{"title":"Cell-Based Assay Kits","description":"\u003cp\u003eWe offer cell-based assays designed for biomedical research, drug screening, and diagnostic fields. Cell-based assays are essential to facilitate research in many areas, including cell analysis, oxidative stress, enzyme activity, organelle analysis, metabolite level, and the status of cell growth, etc.\u003c\/p\u003e","products":[{"product_id":"endothelial-transwell-permeability-assay-kit","title":"Endothelial Transwell Permeability Assay Kit","description":"\u003cp\u003e\u003cb\u003eEndothelial Transwell Permeability Assay Kit (24 SPL PC inserts, 100 assays)\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eIntroduction\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eThe microvascular endothelial cell monolayer localized at the critical interface between the blood and vessel wall has the vital functions of regulating tissue fluid balance and supplying the essential nutrients needed for the survival of the organism. The endothelial cells are able to dynamically regulate its paracellular and transcellular pathways for transport of plasma proteins, solutes, and liquid. The endothelial barrier is a well-regulated structure, which maintains a minimal and selective permeability to fluid and molecules under normal physiological conditions. Vascular leakage is an important feature in several diseases, such as septic shock, inflammation, disruption of blood-brain barrier (BBB)-related neurological disorders, viral hemorrhagic fever, cancer and ischemia-reperfusion injuries. It is emergent to develop a highly sensitive and reliable assay to measure endothelial permeability.\u003c\/p\u003e\u003cp\u003eA simple, reproducible, sensitive, quantitative transwell permeability assay is developed to measure endothelial barrier function for wide analyses of multiple types of endothelial permeability \u003ci\u003ein vitro\u003c\/i\u003e. The assay will be performed by a spectrometer-based absorbance reader (ELISA plate reader) at 450 nm within one hour post endothelial treatment. The assay kit is suitable for primary endothelial cells and immortal cell lines from multiple species. \u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/cellbiologics.com\/document\/1565209608.pdf\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eFor more information, please see Related Documents CB6929 PDF. \u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePulications\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC11274668\/\" target=\"_blank\" rel=\"noopener\"\u003eCerebral Endothelial CXCR2 Promotes Neutrophil Transmigration into Central Nervous System in LPS-Induced Septic Encephalopathy\u003c\/a\u003e\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC7324198\/pdf\/jci-130-136908.pdf\" target=\"_blank\" rel=\"noopener\"\u003eIL-1\u003cstrong\u003eβ\u003c\/strong\u003e suppression of \u003cem\u003eVE-cadherin\u003c\/em\u003e transcription underlies sepsis-induced inflammatory lung injury\u003c\/a\u003e\u003c\/p\u003e\u003ch2\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC8321794\/\" target=\"_blank\" rel=\"noopener\"\u003eEthanol-induced lymphatic endothelial cell permeability via MAP-kinase regulation\u003c\/a\u003e\u003c\/h2\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Cell Biologics","offers":[{"title":"100 assays","offer_id":54527919063324,"sku":"CB6929","price":610.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0937\/8198\/3516\/files\/cb-product-22f3021ff1.jpg?v=1791766978"},{"product_id":"myeloperoxidase-mpo-assay-kit-500-assays","title":"Myeloperoxidase (MPO) Assay Kit (500 assays)","description":"\u003cp\u003e\u003cb\u003eMyeloperoxidase Assay Kit (500 assays)\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eCatalog Number: CB6937\u003c\/p\u003e\u003cp\u003eStorage Temperature: 4 °C\u003c\/p\u003e\u003cp\u003e\u003cb\u003eIntroduction\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eMyeloperoxidase (MPO) is the most abundant proinflammatory enzyme in neutrophilic granulocytes, accounting for approximately 5% of their dry mass. It catalyzes the formation of hypochlorous acid from hydrogen peroxide, generates other highly reactive molecules such as tyrosyl radicals, and cross-links proteins. MPO is implicated in a multitude of diseases, including atherosclerosis, myocardial infarction, atrial fibrillation, multiple sclerosis, Alzheimer’s disease, lung cancer, and transplant rejection. \u003c\/p\u003e\u003cp\u003eWe have developed a simple, rapid and highly sensitive assay to measure cell and tissue MPO activity for wide analyses of multiple types of tissues, organs. The assay will be performed within two hours from sample preparation to data availability.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eKit Components (for 500 assays in 96 well plates)\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eA: Sample preparation buffer (100 ml) – Buffer A\u003c\/p\u003e\u003cp\u003eB: Pre-reaction buffer (50 ml) – Buffer B\u003c\/p\u003e\u003cp\u003eC: Stop buffer (50 ml) – Buffer C\u003c\/p\u003e\u003cp\u003eD: H\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e2\u003c\/sub\u003e solution (500 µl) – Buffer D\u003c\/p\u003e\u003cp\u003eE. Dianisidine dihydrochloride solution (500 ul) – Buffer E\u003c\/p\u003e\u003cp\u003e\u003cb\u003eNote:\u003c\/b\u003e To make 1 ml of \u003cb\u003e\u003cu\u003eReady-to-use Reaction Buffer\u003c\/u\u003e\u003c\/b\u003e, freshly add Solution D (10 ul) and Solution E (10 ul) into the Pre-reaction Butter B (980 ul).\u003c\/p\u003e\u003cp\u003e\u003cb\u003eReagents and Equipment Required but Not Provided\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e· 96 well flat-bottom plate or spectrophotometer cube\u003c\/p\u003e\u003cp\u003e· Spectrophotometric multi-well plate reader or Beckman spectrophotometer\u003c\/p\u003e\u003cp\u003e· Tissue glass homogenizer or grinder\u003c\/p\u003e\u003cp\u003e· PBS\u003c\/p\u003e\u003cp\u003e· Proteinase inhibitor\u003c\/p\u003e\u003cp\u003e\u003cb\u003eProcedure\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003eAll samples and standards should be run in triplicate.\u003c\/p\u003e\u003cp\u003e1. Sample Preparation: Tissues were homogenized in PBS containing proteinase inhibitor and centrifuged at 8,000 ´ g for 5minutes at 4 °C. Remove supernatants, and the pellets were solved in sample preparation Buffer A (Freshly add proteinase inhibitor cocktails) and rotated at 4 °C cold room for 1 hour. Centrifuge at 13,000 ´ g for 10 minutes at 4 °C. The supernatants were collected for direct MPO assay. Sample protein concentration was determined by BCA method.\u003c\/p\u003e\u003cp\u003eNote: Serum samples may be assayed directly or diluted in MPO reaction Buffer\u003c\/p\u003e\u003cp\u003e2. MPO reaction: 20 µl of the protein samples (about 20 µg) were added into 100 µl of freshly prepared \u003cb\u003e\u003cu\u003eready-to-use Reaction Buffer\u003c\/u\u003e\u003c\/b\u003e (98 µl Buffer B + 1 µl Buffer D + 1 µl Buffer E, freshly prepared) for 1-5 min.\u003c\/p\u003e\u003cp\u003e3. Reaction was stopped by adding 80 µl of Stop Buffer C for 5 minutes.\u003c\/p\u003e\u003cp\u003e4. Absorption was measured at 460 nm to estimate MPO activity.\u003c\/p\u003e\u003cp\u003eData are expressed as A460\/Min\/g sample protein.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eReference\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eImmunity. 2018 Jul 17;49(1):56-65. The TWIK2 Potassium Efflux Channel in Macrophages Mediates NLRP3 Inflammasome-Induced Inflammation. Di A1, Xiong S1, Ye Z1, et al.J Clin Invest. 2017 Nov 1;127(11):4124-4135. Caspase-11-mediated endothelial pyroptosis underlies endotoxemia-induced lung injury. Cheng KT, Xiong S, Ye Z, et al.\u003c\/p\u003e","brand":"Cell Biologics","offers":[{"title":"500 assays","offer_id":54527919096092,"sku":"CB6937","price":510.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0937\/8198\/3516\/files\/cb-product-5fd6b8e0d6.jpg?v=1791766977"}],"url":"https:\/\/jkpgye-36.myshopify.com\/collections\/cell-based-assay-kits.oembed","provider":"Cell Biologics","version":"1.0","type":"link"}