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耳疗调节巨噬细胞极化以减少痤疮大鼠模型的炎症反应

文字:[大][中][小] 2024-7-22    浏览次数:561    

Materials and Methods
1. Animals. Male Sprague-Dawley rats (n = 25) weighing180-200 g (6-7 weeks old) were purchased from Beijing Vital   River Laboratory Animal Technology Co., Ltd. and housed at the Experimental Animal Center of Hebei University of  Chinese Medicine. All rats were acclimatized and fed for  one week prior to the experiment and housed in a controlled  environment (12 h light/dark cycle, 22 ± 2 ° C, and 55 ± 5%  relative humidity) with free access to food and water. The environment and animals in this study were SPF grade and  were never used for other research procedures. All experimental procedures were performed in strict accordance with  the Guidance Suggestions for the Care and Use of Laboratory Animals (developed by the Ministry of Science and   Technology, China). The study protocol was obtained from
the Experimental Animal Management and Ethics Committee of Hebei University of Chinese Medicine (license number: DWLL202203131), and all animal handling procedures   were performed in accordance with the Guidelines for the    Protection and Use of Laboratory Animals of Hebei University of Chinese Medicine.
2. Experimental Grouping. After 1 week of acclimatization, the 25 SD rats were randomly divided into five groups: blank  control group (control), acne model group (acne), auricular  bloodletting therapy (ABT), auricular point sticking (APS),and auricular bloodletting therapy combined with auricular  point sticking (ABPS).

3. Interventions. Rats in the blank group (n = 5) were injected subcutaneously with 0.9% saline in the right ear.
The remaining four groups of rats (n = 20) were modeled by subcutaneous injection of P. acnes (3 × 109 cfu/ml, 20 μl/  each, Shanghai Yan Sheng) in the right ear for seven consec utive days [15]. Rats were fifixed by rat fifixators when they  were intervened. ABT was performed by pricking the ear  tip using a sterile 1 ml syringe using the left ear contralateral  point as the stimulation point. The site was subject to bleed  ing (fifive drops). This was repeated two times a week for one  week of intervention. In the APS group, the auricular nail
patch was applied to the left auricular concha with a pres  sure of about 2-5 ibf (WAGNER, USA) for two minutes in   the morning, two minutes at noon, and two minutes in the evening; the auricular nail patch was removed after the pres    sure was applied. The ABPS group performed ABT fifirst  followed by APS. The specifific schedule and interventions   of the experiment are shown in Figure 
4. General Observation of the Rat. The redness and swellingof the rats’ ears were monitored throughout the experimental period. In detail, on day 6, we used an electronic vernier  caliper (AIRAJ, Germany, arz-1331) on the right ear of the  rat to measure the thickness of acne. This measurement procedure would be repeated 3 times, and then, its average value would be calculated. Finally, the local thickness of the acne  was obtained. Similarly, we photographed and preserved   localized acne in the ears of rats.
5. Histological Analysis. We used 20% uratan (0.7 ml/100 g)to anesthetize the rats on day 6. The right ear was taken and   placed in 4% paraformaldehyde and fifixed at room tempera   ture for at least 24 hours. After fifixation, it was paraffiffiffin    embedded, sectioned (5 μm), dewaxed, rehydrated, and  stained with hematoxylin and eosin (HE). Histopathological  changes were examined by light microscopy with any range
of magnifification for each microscopic fifield of view at 40x magnifification.


Mediators of InflammationFigure 1: Experimental roadmap and interventions. (a) The roadmap of this experiment. (b) The schematic diagram of the operation of
auricular bloodletting therapy (ABT). (c) The schematic diagram of the operation of auricular point sticking (APS).minced, and placed in a 50 ml test tube with a   stainless-steel screen. A single cell suspension was prepared  by grinding the spleen with a 5 ml rubber tip syringe while  adding ImunoSep cell sorting solution dropwise. Erythrocyte  lysis was performed using erythrocyte lysis solution (PBM,China). The cell suspensions were incubated with CD68-PE-Vio770 (Miltenyi, Germany), CD86-PE (Thermo Fisher,USA), and CD163-FITC (Bio-Rad, USA) for 30 min at room  temperature followed by flflow cytometry (ThermoFisherAttune NxT, USA) for detection. The experimental data were analyzed by Attune NxT software.at 4° C. PVDF membranes were washed fifive times with TBST at room temperature and incubated with a secondary anti body at room temperature for 1 h. PVDF membranes were rinsed again with TBST fifive times. The ECL kit (Sharebio,China) chemoflfluorescence method was used to cover thestrips, and a fully automated exposure machine was used

for exposure (GelView 6000Plus, China). Band densities were quantifified using ImageJ software (version 1.52a,National Institutes of Health, Bethesda, MD, USA). In this experiment, primary antibodies were used including NF-κB p65 (Cell Signaling Technology, USA), TLR2 (Abcam,UK), p-NF-κB p65 (Cell Signaling Technology, USA),β-actin (Abways, China), and HRP (Abways, China).

引用文献:辛德维   炎症介质    第2023卷,文章编号6627393,共9页     https://doi.org/10.1155/2023/6627393


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