This work was supported by the Sichuan Provincial Department of Science and Technology (2021YJ0175).

The experimental protocol and procedures have received approval from the Administrative and Animal Research Committee of Chengdu University of Traditional Chinese Medicine (Record number: 2022DL-010). Eight-week-old male Sprague Dawley (SD) rats, weighing 180-200 g, were commercially obtained (see Table of Materials) and housed under a natural light/dark cycle with controlled temperature (23 &#177; 2 &#176;C) and relative humidity (55% &#177; 10%). Twelve rats were randomly divided into two groups: the control group and the AR group. All rats were acclimated to these conditions and provided with free access to food and water for one week before the trial.
1. Establishment of a rat model of AR
<ol>
	<li>Preparing the sensitizing solution: suspend 30 mg of ovalbumin (OVA) and 3 g of Al(OH)3 in 100 mL of saline (see Table of Materials)14,15.</li>
	<li>Basic sensitization: grasp and hold the fully awake rat with its abdomen facing up. Disinfect the abdomen using 75% alcohol-soaked cotton balls. Use a 1.5 mL syringe to inject 1 mL of the sensitizing solution prepared in step 1.1 into the left abdominal cavity of the rats in the AR group. Repeat this injection once every two days for 14 days (Figure 1A). 
	NOTE: Ensure that the rat&#39;s head is positioned lower than its tail to prevent damage to the large and small intestines when inserting the syringe. The injection site is located 1.5 cm from the ventral midline. Rats in the control group should receive intraperitoneal injections of 1 mL of normal saline once every two days for 14 days.</li>
	<li>Nasal challenge: Administer 50 &#181;L of 5% OVA via nasal drops using a 100 &#181;L pipette (Figure 1B) on the day following the basal sensitization, repeating this procedure for 7 days (Figure 1C). 
	&#8203;NOTE: Prepare the 5% OVA solution by mixing 5 g of OVA with 100 mL of saline. For the control group, administer drops of the same volume of saline.</li>
</ol>
2. Behavioral scoring of rats
<ol>
	<li>Within 30 min after completing the final nasal challenge, observe and record the rats using a digital camera to identify symptoms such as nose scratching, sneezing, and a runny nose, based on the scoring criteria outlined in Table 1 (Figure 1D). 
	&#8203;NOTE: The confirmation of successful AR modeling is based on achieving a total score of &#8805;5 points14.</li>
</ol>
3. Acquisition of nasal mucosa samples
<ol>
	<li>Sacrificing rats: sacrifice the rats by exposing them to an overdose of CO2. Afterward, disinfect the rats with 75% ethanol (see Table of Materials). Use a scalpel to make an incision along the two corners of the mouth to expose the muscle tissue (Figure 2A). Next, cut the joints of the zygomatic bone and the mandible on both sides of the skull using tissue scissors (Figure 2B), and remove the mandible (Figure 2C).</li>
	<li>Nasal cavity exposure: separate the skin of the maxilla using a hemostat (Figure 2D) to expose the nasal cavity (Figure 2E). Cut the bony connection between the nasal cavity and the maxilla with tissue scissors (Figure 2F). Then, sever the connection between the nasal cavity and the orbital bones on both sides at the infraorbital foramen (Figure 2G) and remove the nasal cavity (Figure 2H).</li>
	<li>Fixation: place the extracted nasal cavity in 4% paraformaldehyde for fixation and store it at room temperature for 24-72 h (see Table of Materials). 
	NOTE: Ensure that the amount of paraformaldehyde fixative used is sufficient to completely cover the sections for proper fixation.</li>
</ol>
4. Pre-processing of nasal mucosa samples
<ol>
	<li>Decalcification: begin by fixing the removed tissues from step 3.1. Wash them three times with PBS for 20 min each. Follow this by washing them three times with distilled water, each time for 20 min. Subsequently, decalcify the tissues in a decalcification solution with a volume of 20-30 times that of the tissues at room temperature.
	<ol>
		<li>The decalcification solution (see Table of Materials) should maintain a pH of 7.2-7.4. Finally, place the decalcified tissue into a dehydration box. 
		NOTE: The decalcifying solution needs to be changed weekly. The decalcification process can be concluded when the tissue softens (approximately 2 months).</li>
	</ol>
	</li>
	<li>Dehydration and waxing: transfer the dehydration box to a dehydrator (see Table of Materials). Begin with 75% alcohol for 4 h, followed by 85% alcohol for 2 h, 90% alcohol for 2 h, and 95% alcohol for 1 h.
	<ol>
		<li>Subsequently, immerse the tissue in anhydrous ethanol for 30 min, repeat the process for another 30 min, use xylene for 5-10 min, repeat this step for another 5-10 min, immerse the tissue in wax for 1 h, repeat this step for another hour, and finally, immerse the tissue in wax for an additional 1 h.</li>
	</ol>
	</li>
	<li>Embedding: place the melted wax block into the embedding box (see Table of Materials) and store it in a -20 &#176;C freezer. Once the wax solidifies, remove it and trim the wax block.</li>
	<li>Slicing: insert the trimmed wax block into a paraffin microtome (see Table of Materials) and cut it into slices with a thickness of 3 &#181;m. Place the slices in a 40 &#176;C water bath on a slide spreader. Flatten the tissue, then lift it with a glass slide and bake it in a 60 &#176;C oven.
	<ol>
		<li>After the water has evaporated, and the wax is properly set, remove the slides and store them at a temperature of 25 &#176;C.</li>
	</ol>
	</li>
</ol>
5. H&#38;E staining of nasal mucosal tissue
<ol>
	<li>Dewaxing and hydration: place the slices in xylene for 20 min, repeat the process for another 20 min, absolute ethanol for 5 min, repeat this step for another 5 min, 75% alcohol for 5 min, and finally, wash for 5 min.</li>
	<li>Hematoxylin staining: dispense 100 &#181;L of hematoxylin staining solution (see Table of Materials) for 3-5 min using a 100 &#181;L pipette, rinse for 5-10 s, add 100 &#181;L of 0.5% hydrochloric acid ethanol for 10-30 s, rinse for 5-10 s, add 100 &#181;L of 0.2% ammonia water for 10-30 s, and rinse for 30 s. 
	NOTE: After hematoxylin staining, differentiation with 0.5% hydrochloric acid ethanol is necessary to remove excessive hematoxylin dye bound to the nucleus and absorbed by the cytoplasm. When eosin staining is performed, the nuclei and cytoplasm will be clearly stained. The slices will appear red or pink after differentiation with 0.5% hydrochloric acid ethanol, so rinse immediately after differentiation to remove the acid from the tissue slices to halt the differentiation. Then, use 0.2% ammonia water to enhance nuclear staining.</li>
	<li>Eosin staining: use a 100 &#181;L pipette to dispense 100 &#181;L of eosin staining solution (see Table of Materials) for 5 min and rinse for 30 s.</li>
	<li>Dehydration and sealing: immerse the slices in absolute ethanol for 5 min, repeat the process for another 5 min, repeat once more for 5 min, dimethyl for 5 min, and xylene for 5 min. Finally, seal with neutral resin (see Table of Materials).</li>
	<li>Placing the stained section on the microscope: position the stained section on the microscope, adjust the microscope&#39;s focus until the image is clearly visible, set the magnification to 40x, and capture the image.</li>
</ol>
6. Multicolor immunostaining of nasal mucosal tissue
<ol>
	<li>Dewaxing and hydration: follow the same as mentioned in step 5.1.</li>
	<li>Citrate-phosphate buffer treatment: place the citrate-phosphate buffer (pH 6.0) (see Table of Materials) into a microwave-safe container. Heat it until boiling, remove it, and then add the slides to the container. Microwave on medium heat for 8 min until boiling, turn off the heat for 8 min, and then switch to medium-low heat for 7 min.
	<ol>
		<li>After natural cooling, transfer the slices to PBS (pH 7.4), shake, and wash them three times using a decolorizing shaker, each time for 5 min. 
		NOTE: Ensure that the buffer does not evaporate during this process, and prevent the slices from drying out.</li>
	</ol>
	</li>
	<li>Blocking endogenous peroxidase: dry the slices, draw a circle around the tissue with an immunohistochemical pen (to prevent the antibody from flowing away), and apply 3% hydrogen peroxide solution (hydrogen peroxide: pure water = 1:9).
	<ol>
		<li>Incubate at room temperature in the dark for 15 min. After natural cooling, place the slices in PBS (pH 7.4) and shake them on a decolorizing shaker for three cycles of 5 min each.</li>
	</ol>
	</li>
	<li>Blocking: apply 5% goat serum within the circle and incubate for 30 min.</li>
	<li>Primary antibody addition: gently remove the blocking solution, add FOXP3 (dilution: 1:200, see Table of Materials) to the slice, and place it in a humid chamber. Incubate at 4 &#176;C overnight. 
	NOTE: Add a small amount of water to the humid chamber to prevent antibody evaporation.</li>
	<li>Secondary antibody addition: place the slices in PBS (pH 7.4) and shake them on a decolorizing shaker for three cycles of 5 min each. Gently dry the slices and apply the secondary antibody (Goat Anti-Rabbit IgG H&#38;L, see Table of Materials) within the circle. Incubate at room temperature for 50 min in the dark.</li>
	<li>Preparation of Tyramide dilution solution: combine 100 &#181;L of 3% H2O2 with 100 mL of 1x TBST (see Table of Materials).</li>
	<li>Addition of TSA working solution: Mix 1 mL of Tyramide diluent with 2 &#181;L of CY3-Tyramide to prepare TSA working solution. Apply 100 &#181;L of TSA working solution to each slice and incubate at room temperature in the dark for 10 min. Then, wash the slices with PBS three times, 5 min each time. 
	NOTE: Prepare and use the TSA working solution immediately, and store it at 4 &#176;C in the dark; it is valid for up to 24 h.</li>
	<li>Repeat Steps 6.2-6.8: switch to a 1:200 dilution of ROR&#947;t (FITC fluorescent dye) and then to a 1:200 dilution of TICAM1 (TYP620 dye) (see Table of Materials).</li>
	<li>DAPI counterstained nuclei: shake the slices gently to dry them, apply DAPI staining solution, and incubate at room temperature for 10 min in the dark.</li>
	<li>Quenching autofluorescence: place the slices in PBS (pH 7.4) and shake them on a decolorizing shaker for three cycles of 5 min each. Apply the autofluorescence quencher (see Table of Materials) to the slices, wait for 5 min, and then wash for 10 min.</li>
	<li>Blocking: place the slices in PBS (pH 7.4) and shake them on a decolorizing shaker for three cycles of 5 min each. Gently shake the slices to dry them and seal them with the anti-fluorescence quencher (see Table of Materials).</li>
	<li>Microscopy: place the stained section on the microscope, adjust the microscope&#39;s focus for clear visibility, set the magnification to 20x and 40x, and capture the image. 
	NOTE: DAPI has a UV excitation wavelength of 330-380 nm and an emission wavelength of 420 nm (blue light). FITC has an excitation wavelength of 465-495 nm and an emission wavelength of 515-555 nm (green light). CY3 has an excitation wavelength of 510-560 nm and an emission wavelength of 590 nm (red light). TYP-690 has an excitation wavelength of 630 nm and an emission wavelength of 690 nm (pink light).</li>
</ol>

Multicolor Immunofluorescence of the Nasal Tissue in an Allergic Rhinitis Rat Model

<ol>
	<li>Bro&#380;ek, J. L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Allergic+rhinitis+and+its+impact+on+asthma+(ARIA)+Guidelines-2016+revision.">Allergic rhinitis and its impact on asthma (ARIA) Guidelines-2016 revision.</a> The Journal of Allergy and Clinical Immunology. 140 (4), 950-958 (2017).</li><li>Maurer, M., Zuberbier, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Undertreatment+of+rhinitis+symptoms+in+Europe:+findings+from+a+cross-sectional+questionnaire+survey.">Undertreatment of rhinitis symptoms in Europe: findings from a cross-sectional questionnaire survey.</a> Allergy. 62 (9), 1057-1063 (2007).</li><li>Ding, Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Alpha-linolenic+acid+improves+nasal+mucosa+epithelial+barrier+function+in+allergic+rhinitis+by+arresting+CD4++T+cell+differentiation+via+IL-4R&#945;-JAK2-STAT3+pathway.">Alpha-linolenic acid improves nasal mucosa epithelial barrier function in allergic rhinitis by arresting CD4+ T cell differentiation via IL-4R&#945;-JAK2-STAT3 pathway.</a> Phytomedicine: International Journal of Phytotherapy and Phytopharmacology. 116, 154825 (2023).</li><li>Zhou, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Activation+of+NLRP3+inflammasome+contributes+to+the+inflammatory+response+to+allergic+rhinitis+via+macrophage+pyroptosis.">Activation of NLRP3 inflammasome contributes to the inflammatory response to allergic rhinitis via macrophage pyroptosis.</a> International Immunopharmacology. 110, 109012 (2022).</li><li>Watts, A. M., Cripps, A. W., West, N. P., Cox, A. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Modulation+of+allergic+inflammation+in+the+nasal+mucosa+of+allergic+rhinitis+sufferers+with+topical+pharmaceutical+agents.">Modulation of allergic inflammation in the nasal mucosa of allergic rhinitis sufferers with topical pharmaceutical agents.</a> Frontiers in pharmacology. 10, 294 (2019).</li><li>Patel, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Fungal+extracts+stimulate+solitary+chemosensory+cell+expansion+in+noninvasive+fungal+rhinosinusitis.">Fungal extracts stimulate solitary chemosensory cell expansion in noninvasive fungal rhinosinusitis.</a> International Forum of Allergy &amp; Rhinology. 9 (7), 730-737 (2019).</li><li>Granier, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tim-3+expression+on+tumor-infiltrating+PD-1(+)CD8(+)+T+cells+correlates+with+poor+clinical+outcome+in+renal+cell+carcinoma.">Tim-3 expression on tumor-infiltrating PD-1(+)CD8(+) T cells correlates with poor clinical outcome in renal cell carcinoma.</a> Cancer Research. 77 (5), 1075-1082 (2017).</li><li>Badoua, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=PD-1-ex+pressing+tumor-infiltrating+T+cells+are+a+favorable+prognostic+biomarker+in+HPV-associated+head+and+neck+cancer.">PD-1-ex pressing tumor-infiltrating T cells are a favorable prognostic biomarker in HPV-associated head and neck cancer.</a> Cancer Research. 73 (1), 128-138 (2013).</li><li>Fedchenko, N., Reifenrath, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Different+approaches+for+interpretation+and+reporting+of+immunohistochemistry+analysis+results+in+the+bone+tissue+-+a+review.">Different approaches for interpretation and reporting of immunohistochemistry analysis results in the bone tissue - a review.</a> Diagnostic Pathology. 9, 221 (2014).</li><li>Faget, L., Hnasko, T. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tyramide+signal+amplification+for+immunofluorescent+enhancement.">Tyramide signal amplification for immunofluorescent enhancement.</a> Methods in Molecular Biology. 1318, 161-172 (2015).</li><li>Parra, E. R., Villalobos, P., Rodriguez-Canales, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+multiple+faces+of+programmed+cell+death+ligand+1+expression+in+malignant+and+nonmalignant+cells.">The multiple faces of programmed cell death ligand 1 expression in malignant and nonmalignant cells.</a> Applied Immunohistochemistry &amp; Molecular Morphology.: AIMM. 27 (4), 287-294 (2019).</li><li>Welsh, A. W., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Standardization+of+estrogen+receptor+measurement+in+breast+cancer+suggests+false-negative+results+are+a+function+of+threshold+intensity+rather+than+percentage+of+positive+cells.">Standardization of estrogen receptor measurement in breast cancer suggests false-negative results are a function of threshold intensity rather than percentage of positive cells.</a> Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology. 29 (22), 2978-2984 (2011).</li><li>Parra, E. R., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Validation+of+multiplex+immunofluorescence+panels+using+multispectral+microscopy+for+immune-profiling+of+formalin-fixed+and+paraffin-embedded+human+tumor+tissues.">Validation of multiplex immunofluorescence panels using multispectral microscopy for immune-profiling of formalin-fixed and paraffin-embedded human tumor tissues.</a> Scientific Reports. 7 (1), 13380 (2017).</li><li>Miao, M., Xiang, L., Miao, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Specification+for+preparation+of+allergic+rhinitis+animal+model+(draft).">Specification for preparation of allergic rhinitis animal model (draft).</a> Chinese Traditional and Herbal Drugs. 49 (1), 50-57 (2018).</li><li>Xu, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Astragalus+polysaccharides+attenuate+ovalbumin-induced+allergic+rhinitis+in+rats+by+inhibiting+nlrp3+inflammasome+activation+and+nod2-mediated+nf-+&#954;+b+activation.">Astragalus polysaccharides attenuate ovalbumin-induced allergic rhinitis in rats by inhibiting nlrp3 inflammasome activation and nod2-mediated nf- &#954; b activation.</a> Journal of Medicinal Food. 24 (1), 1-9 (2021).</li><li>Bousquet, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Allergic+rhinitis.">Allergic rhinitis.</a> Nature reviews. 6 (1), 95 (2020).</li><li>Huang, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Expression+of+activated+signal+transducer+and+activator+of+transcription-3+as+a+predictive+and+prognostic+marker+in+advanced+esophageal+squamous+cell+carcinoma.">Expression of activated signal transducer and activator of transcription-3 as a predictive and prognostic marker in advanced esophageal squamous cell carcinoma.</a> World Journal of Surgical Oncology. 13, 314 (2015).</li><li>Leynaert, B., Bousquet, J., Neukirch, C., Liard, R., Neukirch, F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Perennial+rhinitis:+An+independent+risk+factor+for+asthma+in+nonatopic+subjects:+results+from+the+European+Community+Respiratory+Health+Survey.">Perennial rhinitis: An independent risk factor for asthma in nonatopic subjects: results from the European Community Respiratory Health Survey.</a> The Journal of Allergy and Clinical Immunology. 104 (2), 301-304 (1999).</li><li>Guerra, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Rhinitis+is+an+independent+risk+factor+for+developing+cough+apart+from+colds+among+adults.">Rhinitis is an independent risk factor for developing cough apart from colds among adults.</a> Allergy. 60 (3), 343-349 (2005).</li><li>Greisner, W. A., Settipane, R. J., Settipane, G. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Co-existence+of+asthma+and+allergic+rhinitis:+a+23-year+follow-up+study+of+college+students.">Co-existence of asthma and allergic rhinitis: a 23-year follow-up study of college students.</a> Allergy and Asthma Proceedings. 19 (4), 185-188 (1998).</li><li>Pawankar, R., Mori, S., Ozu, C., Kimura, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Overview+on+the+pathomechanisms+of+allergic+rhinitis.">Overview on the pathomechanisms of allergic rhinitis.</a> Asia Pacific Allergy. 1 (3), 157-167 (2011).</li><li>Van Nguyen, T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Anti-allergic+rhinitis+activity+of+&#945;-lipoic+acid+via+balancing+th17/treg+expression+and+enhancing+nrf2/ho-1+pathway+signaling.">Anti-allergic rhinitis activity of &#945;-lipoic acid via balancing th17/treg expression and enhancing nrf2/ho-1 pathway signaling.</a> Scientific Reports. 10 (1), 12528 (2020).</li><li>Ivanov, I. I., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+orphan+nuclear+receptor+ror&#947;t+directs+the+differentiation+program+of+proinflammatory+IL-17++T+helper+cells.">The orphan nuclear receptor ror&#947;t directs the differentiation program of proinflammatory IL-17+ T helper cells.</a> Cell. 126 (6), 1121-1133 (2006).</li><li>Fontenot, J. D., Gavin, M. A., Rudensky, A. Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Foxp3+programs+the+development+and+function+of+CD4+CD25++regulatory+T+cells.">Foxp3 programs the development and function of CD4+CD25+ regulatory T cells.</a> Nature Immunology. 4 (4), 330-336 (2003).</li><li>Zhou, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Instability+of+the+transcription+factor+Foxp3+leads+to+the+generation+of+pathogenic+memory+T+cells+in+Vivo.">Instability of the transcription factor Foxp3 leads to the generation of pathogenic memory T cells in Vivo.</a> Nature Immunology. 10 (9), 1000-1007 (2009).</li><li>Ziegler, S. F., Buckner, J. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Foxp3+and+the+regulation+of+Treg/Th17+differentiation.">Foxp3 and the regulation of Treg/Th17 differentiation.</a> Microbes and Infection. 11 (5), 594-598 (2009).</li><li>Yaling, Y., Gui, Y., Shuqi, Q. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Recent+research+advances+of+toll-like+receptors+and+allergic+rhinitis.">Recent research advances of toll-like receptors and allergic rhinitis.</a> Medical Recapitulate. 23 (7), 1273-1276 (2017).</li><li>Shan, H., Jie, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Correlation+between+TLR4+gene+polymorphisms+and+allergic+rhinitis.">Correlation between TLR4 gene polymorphisms and allergic rhinitis.</a> Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery. 31 (13), 991-994 (2017).</li><li>Xu, O., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Immunoregulatory+mechanism+of+Treg+cells+and+TICAM-1+patients+with+severe+allergic+rhinitis.">Immunoregulatory mechanism of Treg cells and TICAM-1 patients with severe allergic rhinitis.</a> Chinese Journal of Coal Industry Medicine. 23 (3), 303-306 (2020).</li><li>Granier, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tim-3+expression+on+tumor-infiltrating+PD-1+CD8++T+cells+correlates+with+poor+clinical+outcome+in+renal+cell+carcinoma.">Tim-3 expression on tumor-infiltrating PD-1+CD8+ T cells correlates with poor clinical outcome in renal cell carcinoma.</a> Cancer Research. 77 (5), 1075-1082 (2017).</li><li>Badoual, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=PD-1+expressing+tumor-infiltrating+T+cells+are+a+favorable+prognostic+biomarker+in+hpv-associated+head+and+neck+cancer.">PD-1 expressing tumor-infiltrating T cells are a favorable prognostic biomarker in hpv-associated head and neck cancer.</a> Cancer Research. 73 (1), 128-138 (2013).</li><li>Gustavson, M. D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Development+of+an+unsupervised+pixel-based+clustering+algorithm+for+compartmentalization+of+immunohistochemical+expression+using+automated+quantitative+analysis.">Development of an unsupervised pixel-based clustering algorithm for compartmentalization of immunohistochemical expression using automated quantitative analysis.</a> Applied Immunohistochemistry &amp; Molecular Morphology. 17 (4), 329-337 (2009).</li><li>Lu, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Comparison+of+biomarker+modalities+for+predicting+response+to+PD-1/PD-L1+checkpoint+blockade:+a+systematic+review+and+meta-analysis.">Comparison of biomarker modalities for predicting response to PD-1/PD-L1 checkpoint blockade: a systematic review and meta-analysis.</a> JAMA Oncology. 5 (8), 1195-1204 (2019).</li><li>Hernandez, S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Multiplex+immunofluorescence+tyramide+signal+amplification+for+immune+cell+profiling+of+paraffin-embedded+tumor+tissues.">Multiplex immunofluorescence tyramide signal amplification for immune cell profiling of paraffin-embedded tumor tissues.</a> Frontiers in Molecular Biosciences. 8, 667067 (2021).</li></ol>

The authors have nothing to disclose.

Allergic Rhinitis (AR) is a non-infectious inflammatory disease of the nasal mucosa resulting from a combination of environmental and genetic factors. It has become a global health concern, impacting work efficiency, diminishing the quality of life, impairing sleep, cognitive function, and causing irritability and fatigue. AR affects 10%-20% of the world&#39;s population&#185; and carries substantial economic costs, causing annual losses of up to 30-50 billion euros in EU countries18. Moreover, se...

Allergic rhinitis (AR) is a chronic, non-infectious inflammatory disease of the nasal mucosa primarily mediated by specific immunoglobulin E (IgE)1,2. It is characterized by symptoms such as sneezing, a runny nose, nasal congestion, and nasal itching. With industrialization and urbanization, the prevalence of AR is gradually increasing, affecting approximately 10%-20% of the world&#39;s population1. The immunofluorescence (IF) technique is a fluorescent staining method that utilizes an antibody-antigen binding reaction. It can be employed to detect and quantify the distribution and expression levels of specific proteins in biological tissues or cells. In AR research, IF can simultaneously detect multiple targets, including AR-related cytokines, inflammatory cells, receptors, and more, facilitating the exploration of AR pathogenesis and the effects of drugs3,4,5,6.
The multicolor immunofluorescence (mIF) staining process closely resembles traditional IF, with the addition of an antibody elution step during each round of staining. This modification enables the simultaneous detection of multiple biomarkers on the same tissue section through sequential single-labeling and multiple rounds of re-staining. mIF is based on tyramide signal amplification (TSA), allowing for repeated cycles of TSA fluorescent staining and the use of microwave heating to remove antibodies while retaining fluorescent signals7,8. In comparison to conventional IF, mIF offers several advantages: (1) it can detect weakly expressed antigens that are challenging to identify with conventional IF9,10; (2) it provides high-quality staining with an improved signal-to-noise ratio; (3) it allows for the quantification of tissue-specific structures and regions of interest11; (4) multiplexing multiple pathways efficiently utilizes tissues and conserves limited pathological resources12; (5) multi-parameter analysis through mIF offers deeper insights into tissues, uncovering hidden biological information13.
Overall, mIF allows the observation of different antigen expressions and distributions within the same sample, facilitating the study of target proteins. In the future, researchers seeking to understand the expression and distribution of multiple target proteins will find this technique a valuable choice. This study demonstrates the application of mIF for staining nasal mucosa samples from rats with AR and evaluate the establishment of a rat model of AR.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Al(OH)3</td>
			<td>Sollerbauer Biotechnology Co., Ltd</td>
			<td>A7130</td>
			<td></td>
		</tr>
		<tr>
			<td>75% ethanol</td>
			<td>Anhui Yiren An Co., Ltd</td>
			<td>20210107</td>
			<td></td>
		</tr>
		<tr>
			<td>Ammonia</td>
			<td>Chengdu Kolon Chemical Co., Ltd</td>
			<td>2021070101</td>
			<td></td>
		</tr>
		<tr>
			<td>Anhydrous ethanol</td>
			<td>Chengdu Kolon Chemical Co., Ltd</td>
			<td>2022070501</td>
			<td></td>
		</tr>
		<tr>
			<td>Anti-fluorescence quenching sealer</td>
			<td>SouthernBiotech</td>
			<td>0100-01</td>
			<td></td>
		</tr>
		<tr>
			<td>Automatic dyeing machine</td>
			<td>Thermo scientific</td>
			<td>Varistain Gemini ES</td>
			<td></td>
		</tr>
		<tr>
			<td>Carrier slides</td>
			<td>Nantong Mei Wei De Experimental Equipment Co., Ltd</td>
			<td>220518001</td>
			<td></td>
		</tr>
		<tr>
			<td>Citrate-phosphate buffer&#160;</td>
			<td>Servicebio biotechnology co., Ltd</td>
			<td>G1201</td>
			<td></td>
		</tr>
		<tr>
			<td>Citric acid antigen repair solution (PH 6.0)</td>
			<td>Xavier Biotechnology Co., Ltd</td>
			<td>G1201</td>
			<td></td>
		</tr>
		<tr>
			<td>Coverslip</td>
			<td>Nantong Mei Wei De Experimental Equipment Co.</td>
			<td>220518001</td>
			<td></td>
		</tr>
		<tr>
			<td>Coverslip</td>
			<td>Nantong Mewtech Life Science Co., Ltd</td>
			<td>CS01-2450</td>
			<td></td>
		</tr>
		<tr>
			<td>CY3-Tyramide</td>
			<td>Sawell Biotechnology Co., Ltd</td>
			<td>G1223-50UL</td>
			<td></td>
		</tr>
		<tr>
			<td>DAPI</td>
			<td>Sawell Biotechnology Co., Ltd</td>
			<td>G1012</td>
			<td></td>
		</tr>
		<tr>
			<td>Decoloring shaker</td>
			<td>SCILOGEX</td>
			<td>S1010E</td>
			<td></td>
		</tr>
		<tr>
			<td>EDTA decalcification solution</td>
			<td>Wuhan Xavier Biotechnology Co., Ltd</td>
			<td>CR2203047</td>
			<td></td>
		</tr>
		<tr>
			<td>Electric heating blast dryer&#160;</td>
			<td>Shanghai Yiheng Scientific Instruments Co., Ltd</td>
			<td>DHG-9240A</td>
			<td></td>
		</tr>
		<tr>
			<td>Embedding box marking machine</td>
			<td>Thermo scientific</td>
			<td>&#160;PrintMate AS</td>
			<td></td>
		</tr>
		<tr>
			<td>Embedding machine</td>
			<td>Wuhan Junjie Electronics Co., Ltd</td>
			<td>JB-P5</td>
			<td></td>
		</tr>
		<tr>
			<td>Fast tissue dewatering machine</td>
			<td>Thermo scientific</td>
			<td>STP420 ES</td>
			<td></td>
		</tr>
		<tr>
			<td>Film sealer</td>
			<td>Thermo scientific</td>
			<td>Autostainer 360</td>
			<td></td>
		</tr>
		<tr>
			<td>FITC-Tyramide</td>
			<td>Sawell Biotechnology Co., Ltd</td>
			<td>G1222-50UL</td>
			<td></td>
		</tr>
		<tr>
			<td>Fluorescence microscope</td>
			<td>Sunny Optical Technology Co.Ltd</td>
			<td>CX40</td>
			<td></td>
		</tr>
		<tr>
			<td>Foxp3</td>
			<td>Affinity Biosciences Co., Ltd</td>
			<td>bs-10211R</td>
			<td></td>
		</tr>
		<tr>
			<td>Freezing table</td>
			<td>Wuhan Junjie Electronics Co., Ltd</td>
			<td>JB-L5</td>
			<td></td>
		</tr>
		<tr>
			<td>Goat Anti-Rabbit IgG H&#38;L (HRP)</td>
			<td>Liankebio Co., Ltd</td>
			<td>GAR0072</td>
			<td></td>
		</tr>
		<tr>
			<td>Goat serum</td>
			<td>Biosharp</td>
			<td>BL210A</td>
			<td></td>
		</tr>
		<tr>
			<td>H&#38;E staining kit</td>
			<td>Leagene</td>
			<td>DH0020</td>
			<td></td>
		</tr>
		<tr>
			<td>Hemostatic forceps</td>
			<td>Shanghai Medical Devices Co., Ltd</td>
			<td>J31010</td>
			<td></td>
		</tr>
		<tr>
			<td>Hydrochloric acid</td>
			<td>Sichuan Xilong Science Co., Ltd</td>
			<td>210608</td>
			<td></td>
		</tr>
		<tr>
			<td>Immunohistochemical pen</td>
			<td>Biosharp</td>
			<td>BC004</td>
			<td></td>
		</tr>
		<tr>
			<td>Microwave oven</td>
			<td>Midea</td>
			<td>M1-L213B</td>
			<td></td>
		</tr>
		<tr>
			<td>Neutral gum</td>
			<td>Sinopharm Group Chemical Reagent Co., Ltd</td>
			<td>10004160</td>
			<td></td>
		</tr>
		<tr>
			<td>Ovalbumin&#160;</td>
			<td>Sollerbauer Biotechnology Co., Ltd</td>
			<td>A804010</td>
			<td></td>
		</tr>
		<tr>
			<td>Oven</td>
			<td>Shanghai Yiheng Scientific Instruments Co., Ltd</td>
			<td>DHG-9240A</td>
			<td></td>
		</tr>
		<tr>
			<td>Palm centrifuge</td>
			<td>SCILOGEX</td>
			<td>D1008E</td>
			<td></td>
		</tr>
		<tr>
			<td>Paraformaldehyde</td>
			<td>Beyotime Biotechnology Co., Ltd</td>
			<td>P0099-100ml</td>
			<td></td>
		</tr>
		<tr>
			<td>Pathology section scanner</td>
			<td>3DHISTECH Kft</td>
			<td>Pannoramic SCAN&#160;</td>
			<td></td>
		</tr>
		<tr>
			<td>PBS buffer</td>
			<td>Biosharp</td>
			<td>G4202</td>
			<td></td>
		</tr>
		<tr>
			<td>Pipette&#160;</td>
			<td>Dragon</td>
			<td>KE0003087/KA0056573</td>
			<td></td>
		</tr>
		<tr>
			<td>Ror&#947;t</td>
			<td>Affinity Biosciences Co., Ltd</td>
			<td>DF3196</td>
			<td></td>
		</tr>
		<tr>
			<td>Scalpel</td>
			<td>Quanzhou Excellence Medical Co., Ltd</td>
			<td>20170022</td>
			<td></td>
		</tr>
		<tr>
			<td>Self-fluorescent quenching agent Sudan Black B</td>
			<td>Bioengineering Co., Ltd</td>
			<td>A602008-0025</td>
			<td></td>
		</tr>
		<tr>
			<td>Slicer</td>
			<td>Thermo scientific</td>
			<td>HM325</td>
			<td></td>
		</tr>
		<tr>
			<td>Slicing machine</td>
			<td>Thermo scientific</td>
			<td>HM325</td>
			<td></td>
		</tr>
		<tr>
			<td>Slide</td>
			<td>Nantong Mewtech Life Science Co., Ltd</td>
			<td>PC2-301</td>
			<td></td>
		</tr>
		<tr>
			<td>Sprague Dawley rats</td>
			<td>Sichuan Academy of Traditional Chinese Medicine</td>
			<td>SYX <img alt="Equation 1" src="/files/ftp_upload/65937/65937eq01.jpg" style="margin: auto;" /> 2023-0100</td>
			<td></td>
		</tr>
		<tr>
			<td>TICAM-1</td>
			<td>Affinity Biosciences Co., Ltd</td>
			<td>DF6289</td>
			<td></td>
		</tr>
		<tr>
			<td>Tissue scissors</td>
			<td>Shanghai Medical Devices Co., Ltd</td>
			<td>J22120</td>
			<td></td>
		</tr>
		<tr>
			<td>Tissue spreading baking sheet machine</td>
			<td>Wuhan Junjie Electronics Co., Ltd</td>
			<td>JK-6</td>
			<td></td>
		</tr>
		<tr>
			<td>TYR-690 fluorescent dyes</td>
			<td>Shanghai Rutron Biotechnology Co., Ltd</td>
			<td>RC0086-34RM</td>
			<td></td>
		</tr>
		<tr>
			<td>Vortex mixer</td>
			<td>SCILOGEX</td>
			<td>SLK-O3000-S</td>
			<td></td>
		</tr>
		<tr>
			<td>Water bath-slide drier</td>
			<td>Wuhan Junjie Electronics Co., Ltd</td>
			<td>JK-6</td>
			<td></td>
		</tr>
		<tr>
			<td>Wax trimmer</td>
			<td>Wuhan Junjie Electronics Co., Ltd</td>
			<td>JXL-818</td>
			<td></td>
		</tr>
		<tr>
			<td>Xylene</td>
			<td>Chengdu Kolon Chemical Co., Ltd</td>
			<td>2022051901</td>
			<td></td>
		</tr>
	</tbody>
</table>

immunofluorescent labeling in nasal mucosa tissue sections of allergic rhinitis rats via multicolor immunoassay

Allergic rhinitis (AR) is a chronic, non-infectious inflammatory disease of the nasal mucosa, primarily mediated by specific immunoglobulin E (IgE), affecting approximately 10%-20% of the world's population. While immunofluorescence (IF) staining has long been a standard technique for detecting disease-specific protein expression, conventional IF techniques are limited in their ability to detect the expression levels of three or more proteins in the same sample. Consequently, multicolor IF techniques have been developed in recent years, which allow the simultaneous labeling of multiple targets in cells or tissues.
This protocol provides a comprehensive overview of the process for establishing a rat model of AR, obtaining nasal mucosal samples, and the technical procedures for multicolor immunofluorescence. All rats in the AR group exhibited typical symptoms such as sneezing, a runny nose, and an itchy nose, with behavioral observations scoring &#8805;5 points. Hematoxylin and eosin (H&amp;E) staining revealed increased inflammatory cell counts and disrupted nasal mucosal integrity in the AR group. Multicolor immunofluorescence (mIF) demonstrated increased expression of ROR&#947;t and TICAM-1, while Foxp3 expression decreased in the nasal mucosa tissue of AR rats.

Author Spotlight: Advancing Allergic Rhinitis Research with Multicolor Immunofluorescence

Immunofluorescent Labeling in Nasal Mucosa Tissue Sections of Allergic Rhinitis Rats via Multicolor Immunoassay

Our main research is based on a study of allergic rhinitis. Our research intends to analyze what proteins are associated with allergic rhinitis. Multicolor immunofluorescence is currently used to advance research in our field.In future studies, we will focus on the possible mechanisms of TCM in the treatment of allergic rhinitis.

Six SD rats were successfully induced into the AR model through OVA intraperitoneal injection and nasal challenge. AR was induced in all rats in the AR group, accounting for 100% of the group. All rats in the AR group exhibited typical symptoms such as sneezing, a runny nose, and an itchy nose. All behavioral observations scored &#8805;5 points (Table 2).
H&#38;E staining results on the 21st day of modeling revealed that in the control rats, the nasal mucosa&#39;s e...

Watch this Scientific Journal Video about Advancing Allergic Rhinitis Research with Multicolor Immunofluorescence at JoVE.com

This protocol describes a multicolor immunofluorescence technique for evaluating the rat model of allergic rhinitis.

Allergic rhinitis (AR) is a chronic, non-infectious inflammatory disease of the nasal mucosa, primarily mediated by specific immunoglobulin E (IgE), ...

immunofluorescent-labeling-nasal-mucosa-tissue-sections-allergic

Research

JoVE Journal

Medicine

Acquisition and Pre-Processing of Nasal Mucosal Samples from Rats with Allergic Rhinitis

To begin, with a scalpel, make a precise incision along the two corners of the mouth of a euthanized rat to expose the muscle tissue. Use a pair of tissue scissors to cut the joints of the zygomatic bone and the mandible on both sides of the skull. Then remove the mandible.Use tissue scissors to cut the bony connection between the nasal cavity and the maxilla. Then use a hemostat to separate the skin of the maxilla to expose the nasal cavity. Sever the connection between the nasal cavity and the orbital bones on both sides at the infraorbital foramen, and remove the nasal cavity.Place the extracted nasal cavity in a 4%Paraformaldehyde solution for fixation. To decalcify the tissue, wash the fixed tissue with distilled water. Place the tissues in a decalcification solution with a volume 20 to 30 times that of the tissues at room temperature.Once decalcification is complete, place the tissue in a dehydration box. Transfer the dehydration box to a dehydrator and dehydrate the tissue in increasing alcohol concentrations at different incubation times. Next, place the tissue in anhydrous ethanol for 30 minutes for two cycles.Following this, transfer the tissue to xylene for five to 10 minutes and repeat, then immerse the tissue in wax for one hour. Place the wax block in embedding cassettes. Remove the wax blocks after they have solidified and trim the wax block.Insert the trimmed wax block into a paraffin microtome and cut it into three micrometer thick slices. Hematoxylin and eosin staining of the control rats showed well arranged and cilia. The nasal septum mucosa was damaged and detached in the disease group with notable neutrophil infiltration.

Multicolor Immunostaining of Nasal Mucosal Tissues of Rats with Allergic Rhinitis

To begin, place the hematoxylin and eosin stained rat nasal mucosal tissue sections onto a microscope stage. Adjust the microscope's focus until the image is clearly visible. Capture the tissue image at 40X.Heat the citrate phosphate buffer until it boils. Then add the slides to the container after removing it from the heat. After heating for eight minutes until boiling, turn off the heat for eight minutes and subsequently switch to medium low heat for seven minutes.After allowing the container to cool naturally transfer the slices to PBS. Use a decolorizing shaker to shake the slices for five minutes. Next draw a circle around the dried tissue with an immunohistochemical pen.Add 3%hydrogen peroxide solution to the slices before incubating. Then transfer the slices to PBS for washing as before. To block, apply 5%goat serum within the marked circle.After incubation, carefully remove the blocking solution and add one to two milliliters of FOXP3 to the tissue slices. Then place the slices in a humid chamber for overnight incubation. After washing the slices in PBS, gently dab the slices dry with filter paper.Then add one to two milliliters of the secondary antibody solution to the slices. Next incubate the slices in 100 microliters of tyramide signal amplification working solution for 10 minutes at room temperature in the dark. After incubation, wash the slices with PBS three times for five minutes each.Now apply one to two milliliters of DAPI staining solution to the slices before incubation. Quench the auto fluorescence by incubating the slices in the quencher for five minutes before a 10 minute PBS wash. Then seal them with the anti fluorescence quencher.Capture the microscopic images of the stained sections under 20X and 40X magnification. Hematoxylin and eosin staining of the control rats showed well arranged epithelial cells and cilia. The nasal septum mucosa was damaged and detached in the disease group with notable neutrophil infiltration.Multi immunofluorescent staining revealed that the expressions of ROR Gamma T and TCAM1 were increased in the disease group. However, FOXP3 was under expressed.

1.5K Views.  Hospital of Chengdu University of Traditional Chinese Medicine.  This protocol describes a multicolor immunofluorescence technique for evaluating the rat model of allergic rhinitis.

Multicolor Immunofluorescence of the Nasal Tissue in an Allergic Rhinitis Rat Model

Summary