Description_x000D_ General description_x000D_ The Human TGF-β 1 ELISA (Enzyme-Linked mmunosorbent Assay) kit is an in vitro enzyme-linked immunosorbent assay for the quantitative measurement of human TGF-β 1 in serum, plasma, cell culture supernatants and urine._x000D_ Immunogen_x000D_ Recombinant Human TGF-β 1_x000D_ Application_x000D_ For research use only. Not for use in diagnostic procedures._x000D_ Human transforming growth factor-β1 (TGF-β1) ELISA Kit has been used to measure level of TGF-β1 released from tubular cells._x000D_ Biochem/physiol Actions_x000D_ Transforming growth factor-β1 (TGF-β1) is a pluripotential cytokine that plays a vital role in the homeostasis of peripheral CD4+CD25+ regulatory T cells and regulation of FOXP3 (forkhead box P3) expression in vivo. Binding of TGF-β1 to its receptor, activates members of the SMAD protein family involved in gene regulation. Study shows that reduced expression of circulating transforming growth factor-β1 (TGF-β1) might contribute to systemic lupus erythematosus (SLE) development. Polymorphism of TGF-β1 is associated with pathogenesis of rheumatoid arthritis (RA) and pneumoconiosis. Serum TGF-β1 expression is elevated in systemic sclerosis (SSc) patients. Serum TGF-β1 functions as a potential biomarker of Guillain-Barré syndrome (GBS) and SSc._x000D_ Other Notes_x000D_ A sample Certificate of Analysis is available for this product._x000D_ Please type the word sample in the text box provided for lot number.