Resistin (ADSF, Adipose Tissue-Specific Secretory Factor, FIZZ3, Found in Inflammatory Zone)

Resistance to insulin characterizes type 2 diabetes, the most common form of diabetes. There is a strong link between type 2 diabetes and obesity, as most patients tend to be obese. Thiozolidinediones (TZDs), a new class of anti-diabetic drugs, enhances target-tissue sensitivity to insulin. A screen of genes down regulated by TZD in adipocyte led to the discovery of a new protein hormone called resistin (for resistance to insulin). Resistin, specifically produced and secreted by adipocyte, is present at elevated levels in the blood of obese animals, and is down regulated by fasting and anti-diabetic drugs. Antibody to resistin stimulated glucose uptake and improved insulin sensitivity in obese mice. Some other protein related to resistin has been called resistin-related molecules (RELM-alpha and beta). Resistin family of proteins was also identified as proteins (FIZZ1-3, for Found in Inflammatory zone) involved in allergy and inflammation.\nResistin is also described as serine/cysteine-rich Adipocyte-Specific Secretory Factor (ADSF or FIZZ3). Resistin (pre peptide length: human 108 aa; mouse/rat 114 aa; mol wt ~12.5kD) is characterized by the presence of a hydrophobic signal peptide that is cleaved before its secretion. Resistin proteins show ~55% homology in human and mouse. It is 45-55% related to RELM-alpha/FIZZ1/PMNG1 (Parasite-induced Macrophage Novel Gene 1). RELM-alpha mRNA was most abundant in white adipose tissue. It is also expressed in mammary tissue with significant fat pads. Unlike resistin, RELM-alpha is not expressed in 3T3-L1 adipocyte or in preadipocytes. It is also found in heart, lung and tongue, where resistin is absent. In mice, RELM-alpha/FIZZ1 is found at low levels in a subset of bronchial epithelial cells and in non-neuronal cells adjacent to neurovascular bundles in the peribronchial stroma, and in the wall of the large and small bowel.\n\nApplications: \nSuitable for use in ELISA and Western Blot. Other applications not tested.\n\nRecommended Dilution:\nWestern Blot: 1-5ug/ml using Chemiluminescence (~9kD)\nELISA: 1:10,000-1:100,000 using 50-100ng of control peptide/well.\nOptimal dilutions to be determined by the researcher.\n\nControl Peptide: \nR1585-22I\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. For long-term storage, store at -20 degrees C. Aliquots are stable for at least 12 months at -20 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

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SPECIFICATIONS

Catalog Number

R1585-22F

Size

50ug

Applications

ELISA, WB

Hosts

Rabbit

Reactivities

Hum

Form

Supplied as a liquid in PBS, pH 7.4, 0.1% BSA, 0.05% sodium azide and 40% glycerol.

P Type

Pab

Purity

Purified by immunoaffinity chromatography.

Isotype

IgG

References

1. Steppan CM et al (2001) Nature 409, 307. 2. Steppan CM et al (2001) PNAS 98, 502. 3. Holcomb IN et al (2000) EMBO J. 19, 4046-4055. 4. Kim K-H et al (2001) J. Biol. Chem. 276, 11252-11256.

Additional Info

Recognizes Human resistin. No significant sequence was found with RELMs. Species sequence homology: porcine-76% and mouse-35%.