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公司新闻
Chondrex 膜通透性检测试剂一级代理(现货)
发布时间:2023-10-27 17:03 | 点击次数:
膜通透性检测
肠道细菌及其毒素的移位可能是自身免疫性疾病发病的重要因素。这种猜测在一段时间内被认为是正确的。但是由于没有合适的研究工具,因此没有得到广泛研究。事实上,研究表明压力、手术和轻微胃肠道疾病等显著增加了黏膜通透性。因此,这种情况下显著增加了细菌从肠黏膜进入人体的机率。
Chondrex公司提供FITC标记的右旋糖苷及D-木糖检测试剂盒用于评估体内和体外大分子对半透膜的通透性。
通透性评估试剂盒FITC-Dextran
货号 | 中文名称 | 英文名称 | 规格 |
6601 | D-木糖检测试剂盒 | D-Xylose Assay Kit | 1Kit |
货号 | 中文名称 | 英文名称 | 分子量 | 规格 |
4013 | FITC标记的右旋糖苷 | FITC-Dextran | 4 kDa | 425 mg/ml x 5 ml |
4009 | FITC标记的右旋糖苷 | FITC-Dextran | 40 kDa | 25 mg/ml x 5 ml |
4014 | FITC标记的右旋糖苷 | FITC-Dextran | 70 kDa | 25 mg/ml x 5 ml |
FITC-标记的右旋糖苷
一些研究表明压力、手术和轻微胃肠道疾病等显著增加了黏膜通透性。荧光标记的右旋糖苷提供了简单,可靠的方法用于评估半透膜功能。关于FITC-标记的右旋糖苷的分子量,( 40kDa),有研究表明在大肠杆菌中大多数蛋白分子量为25-120kDa,这表明最具生物学意义的蛋白质在该范围内。因此Chondrex提供40kDa FITC-右旋糖苷作为相关大分子标记物,用于体外或体内半透膜通透性研究。
检测流程:
1)饲喂前和实验过程中,禁食4小时。
2)口服40 kDa FITC-Dextran (10 mg/250 µl/mouse)。
3)3小时后,收集血浆。
4)1:2 (或更大)用PBS稀释血浆
5)取50-100ul上去到96孔板。读取荧光值:Ex: 490 nm Em: 530 nm
参考文献:
1.Aoki S, Y.K., Yokoyama T, Nonogaki T, Iwasaki S, Mitsui T, Niwa S., Role of enteric bacteria in the pathogenesis of rheumatoid arthritis: evidence for antibodies to enterobacterial common antigens in rheumatoid sera and synovial fluids. Ann Rheum Dis., 55: 363-9 (1996).
2.Peltonen R, Kjeldsen-Kragh J, Haugen M, Tuominen J, Toivanen P, Førre O, Eerola E. Changes of faecal flora in rheumatoid arthritis during fasting and one-year vegetarian diet. Br J Rheumatol, 33: 638-43 (1994).
3.Peltonen R, N.M., Helve T, Hänninen O, Toivanen P, Eerola E. Faecal microbial flora and disease activity in rheumatoid arthritis during a vegan diet. Br J Rheumatol, 36: 64-8 (1997).
4.Terato K, Harper DS, Griffiths MM, Hasty DL, Ye XJ, Cremer MA, Seyer JM. Collagen-induced arthritis in mice: synergistic effect of E.coli lipopolysaccharide bypasses epitope specificity in the induction of arthritis with monoclonal antibodies to type II collagen. Autoimmunity, 22:137-47 (1995).
5.Vaahtovuo J, Munukka E, Korkeamäki M, Luukkainen R, Toivanen P. Fecal microbiota in early rheumatoid arthritis. J Rheumatol, 35(8):1500-5 (2008).
6.Van der Heijden, IM Wilbrink B, Tchetverikov I, Schrijver IA, Schouls LM, Hazenberg MP, Breedveld FC, Tak PP. Presence of bacterial DNA and bacterial peptidoglycans in joints of patients with rheumatoid arthritis and other arthritides. Arthritis Rheum, 43:593-8 (2000).
7.Anderlik P, Szeri I, Bános Z, Barna Z. Bacterial translocation after cold stress in young and old mice. Acta Microbiol Hung, 37:289-94 (1990).
8.Velin AK, Ericson AC, Braaf Y, Wallon C, Söderholm JD. Increased antigen and bacterial uptake in follicle associated epithelium induced by chronic psychological stress in rats. Gut, 53:494-500 (2004).
9.Khalif IL, Quigley EM, Konovitch EA, Maximova ID. Alterations in the colonic flora and intestinal permeability and evidence of immune activation in chronic constipation. Dig Liver Dis, 37: 838-49 (2005).
10.Chong BE, Wall DB, Lubman DM, Flynn SJ. Rapid Profiling of E. coli Proteins Up to 500 kDa from Whole Cell Lysates Using Matrix-assisted Laser Desorption/Ionization time-of-flight mass Spectrometry. Rapid Commun Mass Spectrom, 11(17):1900-8 (1997).
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