acquisition and pre-processing of nasal mucosal samples from rats with allergic rhinitis

过敏性鼻炎大鼠模型中鼻组织的多色免疫荧光

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.

作者聚焦：利用多色免疫荧光推进过敏性鼻炎研究

通过多色免疫测定法对过敏性鼻炎大鼠鼻粘膜组织切片进行免疫荧光标记

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.

Watch this Scientific Journal Video about Acquisition and Pre-Processing of Nasal Mucosal Samples from Rats with Allergic Rhinitis at JoVE.com

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

过敏性鼻炎大鼠鼻粘膜样本的采集和预处理

首先，用手术刀沿着安乐死大鼠嘴的两个角做一个精确的切口，以暴露肌肉组织。用一把组织剪刀剪断颅骨两侧的颧骨和下颌骨的关节。然后取下下颌骨。使用组织剪刀剪断鼻腔和上颌骨之间的骨连接。然后使用止血器分离上颌骨的皮肤，露出鼻腔。在眶下孔处切断鼻腔与眶骨两侧的连接，切除鼻腔。将提取的鼻腔置于4%多聚甲醛溶液中固定。要使组织脱钙，请用蒸馏水清洗固定组织。将组织置于室温下体积为组织 20 至 30 倍的脱钙溶液中。脱钙完成后，将组织放入脱水盒中。将脱水箱转移到脱水机中，并在不同的孵育时间以增加的酒精浓度使组织脱水。接下来，将组织置于无水乙醇中 30 分钟，循环两个循环。之后，将组织转移到二甲苯中 5 到 10 分钟并重复，然后将组织浸入蜡中一小时。将蜡块放入嵌入盒中。凝固后取出蜡块并修剪蜡块。将修剪好的蜡块插入石蜡切片机中，并将其切成三微米厚的切片。对照大鼠的苏木精和伊红染色显示排列良好，纤毛良好。该病组的鼻中隔黏膜受损并脱离，伴有明显的中性粒细胞浸润。

acquisition-pre-processing-nasal-mucosal-samples-from-rats-with

Research

JoVE Journal

Medicine

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

262 次观看.  Hospital of Chengdu University of Traditional Chinese Medicine. 首先，用手术刀沿着安乐死大鼠嘴的两个角做一个精确的切口，以暴露肌肉组织。用一把组织剪刀剪断颅骨两侧的颧骨和下颌骨的关节。然后取下下颌骨。使用组织剪刀剪断鼻腔和上颌骨之间的骨连接。然后使用止血器分离上颌骨的皮肤，露出鼻腔。在眶下孔处切断鼻腔与眶骨两侧的连接，切除鼻腔。将提取的鼻腔置于4%多聚甲醛溶液中固定。要使组织脱钙，请用?...

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

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.

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), ...

科研

医学

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.