Human Cystatin C,Cys-C ELISA Kit

Code CSB-E08384h
Size 96T,5×96T,10×96T
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Product Details

Target Name
cystatin C
Alternative Names
AD 8 ELISA Kit; AD8 ELISA Kit; Amyloid angiopathy and cerebral hemorrhage ELISA Kit; ARMD11 ELISA Kit; bA218C14.4 (cystatin C) ELISA Kit; bA218C14.4 ELISA Kit; Cst 3 ELISA Kit; Cst3 ELISA Kit; CST3 protein ELISA Kit; Cystatin 3 ELISA Kit; Cystatin-3 ELISA Kit; Cystatin-C ELISA Kit; Cystatin3 ELISA Kit; CystatinC ELISA Kit; CYTC_HUMAN ELISA Kit; Epididymis secretory protein Li 2 ELISA Kit; Gamma trace ELISA Kit; Gamma-trace ELISA Kit; HCCAA ELISA Kit; HEL S 2 ELISA Kit; MGC117328 ELISA Kit; Neuroendocrine basic polypeptide ELISA Kit; Post gamma globulin ELISA Kit; Post-gamma-globulin ELISA Kit
Abbreviation
Uniprot No.
Species
Homo sapiens (Human)
Sample Types
serum, plasma, urine, saliva, tissue homogenates
Detection Range
7.8 ng/mL-500 ng/mL
Sensitivity
5.824 ng/mL
Assay Time
1-5h
Sample Volume
50-100ul
Detection Wavelength
450 nm
Research Area
Cardiovascular
Assay Principle
quantitative
Measurement
Sandwich
Precision

 

Intra-assay Precision (Precision within an assay): CV%<8%

Three samples of known concentration were tested twenty times on one plate to assess.

Inter-assay Precision (Precision between assays):CV%<10%

Three samples of known concentration were tested in twenty assays to assess.

 

Linearity

To assess the linearity of the assay, samples were spiked with high concentrations of human CYSC in various matrices and diluted with the Sample Diluent to produce samples with values within the dynamic range of the assay.

Typical Data

 

These standard curves are provided for demonstration only. A standard curve should be generated for each set of samples assayed.

 

Troubleshooting
and FAQs
Storage
Store at 2-8°C. Please refer to protocol.
Shelf Life
6 months
Lead Time
3-5 working days after you place the order, and it takes another 3-5 days for delivery via DHL or FedEx.
Description

The human Cystatin C (CysC) ELISA Kit is suitable for qualitatively determining human CysC levels from samples including serum, plasma, urine, saliva, or tissue homogenates. It uses the Sandwich-ELISA mechanism in combination with the enzyme-substrate chromogenic reaction to measure the NGF content in the sample. The color intensity is positively correlated with CysC content in the sample. The CysC concentration can be calculated according to the standard curve. This kit is tested with high sensitivity, strong specificity, good linearity, high precision and recovery, as well as lot-to-lot consistency.

Human CysC, also called CST3, is a relatively stable protein in serum and heparinized plasma. Serum CysC concentration is the potential to be a convenient measure of glomerular filtration rate (GFR) because it is freely filtered at the level of the glomerulus and virtually all are resorbed and metabolized by the proximal tubular cells. Serum CysC level is a marker of renal function that has been proposed as potentially superior to serum creatinine level for evaluating renal function due to its generation by most nucleated cells at a constant rate. The production of CysC is not affected by age, gender, or muscle mass.

Customer Reviews and Q&A

 Customer Reviews
Average Rating:
5.0 - 1 reviews

Submit a Review here

Sample type: Biological fluids(Urine)

Sample species: Human

Sample dilution: No dilution

Review: We used Cusabio ELISA kits for determination of pediatric reference intervals for urinary Cystatin-C, which requires a greater degree of reliability. Cusabio arranged the shipment within a few days and ensured fastest possible delivery of the kits. The kits were well packed with high thermal insulation with frozen gel packs to ensure thermal protection of the kits during shipment. Customer service was also very friendly and responsive. We are very satisfied about the quality of the products and customer support, and we highly recommend Cusabio ELISA kits for researchers. The ELISA kit contained two vials containing standards and diluents in quite adequate amounts. The contents were well packed with a detailed instruction manual that can be easily understood. Following payment confirmation, Cusabio arranged the shipment within a few days and ensured fastest possible delivery of the kits. The kits were well packed with high thermal insulation with frozen gel packs to ensure thermal protection of the kits during shipment. Customer service was also very friendly and responsive. We are very satisfied about the quality of the products and customer support, and we highly recommend Cusabio ELISA kits for researchers.

By Sameera Gunasekara

 Q&A
Q:

Can I measure cystatin C with macerated tissue in this kit (CSB-E08384h)?

A:

Is it soaking? What kind of solution is it soaking in? Is it formaldehyde? We have never processed similar samples before, and the uniformity of tissue samples is quite different. No matter what processing method it is, gradient pre-experiment is essential; For CSB-E08384h, it is necessary to avoid reagents that could affect protein structure as much as possible, such as formaldehyde.

Target Background

Function
(From Uniprot)
As an inhibitor of cysteine proteinases, this protein is thought to serve an important physiological role as a local regulator of this enzyme activity.
Gene References into Functions
  1. Urinary cystatin-C levels were increased in type 2 diabetic patients with early diabetic nephropathy. PMID: 29673928
  2. Age and cystatin C were found to be significant risk factors for cardiovascular events in a pre-diabetic cohort. PMID: 29661604
  3. Increased cystatin C levels may be associated with enhanced risks of composite endpoints in patients with ST-elevation acute myocardial infarction undergoing elective percutaneous coronary intervention PMID: 29891036
  4. Data suggest that kinetics of degradation/proteolysis versus of aggregation of amyloid beta(1-40) and amyloid beta(1-42) at specific concentrations of amyloid beta, cathepsin B, and cystatin C can be modeled and predicted. PMID: 29046353
  5. Serum CysC, at the time of CRRT (Continuous Renal Replacement Therapy cessation), is an independent predictor of the successful weaning from CRRT in critically ill patients with acute kidney injury. PMID: 29870981
  6. The serum levels of cystatin C and urine NGAL, urine OPN can be used as a good marker for assessing the renal effect of obesity which can lead end stage renal disease in pediatric population. PMID: 30035656
  7. The average of estimated glomerular filtration rate (eGFRave) based on creatinine (eGFRcre) and eGFR based on cystatin C (eGFRcys) best predicted the exacerbation of renal function in allogeneic hematopoietic cell transplantation (allo-HCT). PMID: 29086660
  8. Studied serum Cystatin C as a biomarker in bladder urothelial neoplasm; results found serum Cystatin C not to be a reliable marker in predicting bladder urothelial tumors tumorigenesis and clinicopathological characteristics. PMID: 29789781
  9. bladder cancer (BCa) patients have lower serum cysC concentration than the control group. Serum cysC may be considered as a potential marker of BCa but not its aggressiveness. PMID: 29749360
  10. Postoperative serum Cystatin C, IL-18 and Uric acid after 24h were significantly associated with acute kidney injury PMID: 29627485
  11. Serum CysC is a strong predictor of AKI and the short-term prognosis of CCU patients. PMID: 29179178
  12. Neutrophil gelatinase-associated lipocalin concentrations in the urine and serum on the second day of intensive care unit admission could be used to predict the development of acute kidney injury in the following three to seven days in the intensive care unit; however, the cystatin C concentration did not have predictive value PMID: 28142264
  13. Study demonstrated that the binding of CST3 and PSAP decreased the inhibitory effects of CST3 on proteinase in vitro. The co-localization of both proteins was detected in cultured cells and in Bunina body-containing motor neurons from patients with amyotrophic lateral sclerosis, suggesting that they might be involved in the process of Bunina body formation. PMID: 29249381
  14. elevated cystatin C is independently associated with adverse vascular outcomes in people with suspected or established CAD in terms of all-cause mortality, cardiovascular mortality, and total adverse vascular events [meta-analysis] PMID: 28599259
  15. Cognitive function was significantly and inversely associated with cystatin C and microalbuminuria, in the relatively younger general Japanese population. PMID: 28865325
  16. This paper discusses the current findings regarding the role of Cyst C in cancer progression and the clinical implications emerging from these studies--{review} PMID: 29654808
  17. We enrolled 43 stable coronary artery disease (CAD) male patients to examine the relationship between cystatin C-adiponectin (CysC-APN) complex and coronary plaque characteristics. In multivariate analysis, CysC-APN complex levels were identified as the strongest negative factor for fibrotic components and the strongest positive factor for both necrotic and lipidic plus necrotic components. PMID: 28321013
  18. Urinary cystatin C is an independent risk predictor in patients with acute myocardial infarction. PMID: 28778467
  19. serum Cys-C levels predict renal function in patients with prostate neoplasia, but were not a biomarker for the development of prostate neoplasia, and were not correlated with the clinicopathological characteristics of prostate cancer . PMID: 28812020
  20. There were no associations between serum cysC levels and renal involvement in patients with primary Sjogren's syndrome. PMID: 25367815
  21. cystatin-C should be considered an early biomarker of AKI PMID: 28552392
  22. CysC is as an early acute kidney injury biomarker and predictive of persistent acute kidney injury on aminoglycoside treatment. PMID: 27743042
  23. Cystatin C may be considered a biological marker for vascular dysfunction and subclinical atherosclerosis in SCD. PMID: 27582023
  24. Serum cystatin C level was significantly associated with subclinical atherosclerosis. An increase in cystatin C level could be a valuable surrogate marker for the risk of cardiovascular disease in patients with type 2 diabetes mellitus. PMID: 29090609
  25. Mild-to-moderate kidney dysfunction modifies the relationship between CysC and high-risk coronary lesion, but not NGAL. PMID: 27680774
  26. Increasing cystatin C and cathepsin B reported in serum of colorectal cancer patients. PMID: 28182342
  27. Both cystatin C and beta 2 macroglobulin are elevated in type 2 diabetics with diabetic nephropathy. Cystatin C may be useful in the early diagnosis of diabetic nephropathy PMID: 28182344
  28. Results from nuclear magnetic resonance structural data and molecular dynamics modeling point to conformational requirements and special importance of some amino acid residues in cystatin 3 C-terminal for the its interaction with amyloid beta fragments. PMID: 27714883
  29. The findings of the current studies may be important for future design of hCC dimerization inhibitors. PMID: 27573935
  30. High cystatin C was associated with increased risk of mortality but not with poor functional outcome in patients with acute intracerebral hemorrhage. PMID: 27578255
  31. this results identified cystatin 3 as a biomarker in patients with seasonal allergic rhinitis PMID: 28633877
  32. Serum and urine levels of cystatin C were significantly higher in children with acute kidney injury. [Review and Meta-Analysis] PMID: 28372557
  33. serum level in acute kidney injury patients helps predict risk of chronic kidney disease stage 3 PMID: 27658322
  34. Circulating CysC and Gal-3 were associated with greater left atrial dilatation in patients with heart failure with reduced left ventricular ejection fraction. PMID: 28830298
  35. Application of the cystatin C-based equations most accurately estimate glomerular filtration rate in Chinese patients with chronic kidney disease. PMID: 27125433
  36. This study tested the utility of neutrophil gelatinase-associated lipocalin (NGAL) and cystatin C (CysC) in addition to standard creatinine for early determination of Acute Kidney Injury (AKI) After Heart Operations Using Cardiopulmonary Bypass. The results support the notion that CysC and NGAL should be viewed as comparable for early AKI detection. PMID: 27862029
  37. The strong association between epicardial adipose tissue (EAT) and cystatin C demonstrated herein indicates that EAT accumulation may play an important role in Cystatin C secretion, possibly contributing to cardiometabolic risk in T2DM patients. PMID: 28922364
  38. A high CysC level had predictive value regarding the severity of vascular lesions in acute coronary syndrome. PMID: 28143410
  39. Elevated levels of cystatin C were detected in early diagnosis of right heart failure in patients with systemic sclerosis. PMID: 27414726
  40. biomarker of renal dysfunction, acute-on-chronic liver failure, and hepatorenal syndrome in decompensated liver cirrhosis PMID: 28545169
  41. Data suggest that melanoma cells internalize/absorb cystatin C from culture media, leading to increased intracellular cystatin C levels; cystatin E/M is internalized as well but at modest rate due to down-regulation of cell migration; however, the effect of intracellular cystatin E/M on down-regulation of legumain activity is pronounced. PMID: 28630039
  42. An elevated preoperative Cys-C level was demonstrated to be related with worse survival in patients with renal cell carcinoma(RCC). Measuring preoperative serum Cys-C might be a simple way for finding poor prognostic patients and patients with elevated preoperative Cys-C level should be more closely followed up PMID: 28586363
  43. Acute kidney injury is common following deliberate self-poisoning with a combination washing powder containing oxalic acid and potassium permanganate and cystatin C monitoring may under estimate the severity of poisoning. PMID: 28535124
  44. Cystatin C significantly decreased the lipopolysaccharide-stimulated release and expression of interleukin-1beta and tumor necrosis factor-alpha in monocyte and peripheral blood mononuclear cultures from healthy donors and Crohn's patients. Cystatin C was internalized by monocytes via an active endocytic process, decreased phosphorylation of the MAP kinase pathway ERK-1/2, and altered surface markers. PMID: 27190304
  45. Fibrillation of CysC therefore likely initiates from the monomer and does not require domain-swapping. The non-swapped oligomers likely represent a dead-end offshoot of the amyloid pathway and must dissociate to monomers prior to rearranging to amyloid fibrils. These prefibrillar CysC oligomers were potent inhibitors of aggregation of the Alzheimer's-related peptide, beta-amyloid. PMID: 28487367
  46. CysC plays an important regulatory role in combating cell death via the autophagic pathway in atherosclerosis. PMID: 27079462
  47. Data show that cystatin C deposition in minimally affected samples was limited to the basement membrane (BM) between the dermis and epidermis. PMID: 28067897
  48. Urinary cystatin C levels in the acute kidney injury (AKI) preterm infant group were not significantly higher than in no-AKI group on day of life 1, 3 and 7. PMID: 27020372
  49. Serum cystatin C level was found to be associated with the development and worsening of AKI [Acute kidney injury ] in ICU [intensive care unit ] patients with sepsis. PMID: 28332367
  50. Elevated cystatin C levels at admission were independently associated with impaired myocardial perfusion, poor cardiac functional recovery and development of congestive heart failure in patients with anterior STEMI undergoing PCI. PMID: 26498756

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Involvement in disease
Amyloidosis 6 (AMYL6); Macular degeneration, age-related, 11 (ARMD11)
Subcellular Location
Secreted.
Protein Families
Cystatin family
Tissue Specificity
Expressed in submandibular and sublingual saliva but not in parotid saliva (at protein level). Expressed in various body fluids, such as the cerebrospinal fluid and plasma. Expressed in highest levels in the epididymis, vas deferens, brain, thymus, and ov
Database Links

HGNC: 2475

OMIM: 105150

KEGG: hsa:1471

STRING: 9606.ENSP00000366124

UniGene: Hs.304682

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