H4666 Sigma-Aldrich

Activin A human

recombinant, expressed in HEK 293 cells, HumanKine®, suitable for cell culture



Related Categories Cell Culture, Growth Factors and Cytokines, HumanKine Growth Factors and Cytokines, Reagents and Supplements, Recombinant Activin proteins,
biological source   human
recombinant   expressed in HEK 293 cells
assay   ≥95% (SDS-PAGE)
form   lyophilized powder
potency   ≤10 ng/mL ED50
quality   endotoxin tested
mol wt   dimer mol wt 25 kDa (non-glycosylated)
packaging   pkg of 5x10 μg
  pkg of 10 μg
impurities   ≤1 EU/mg
suitability   suitable for cell culture
storage temp.   −20°C


Analysis Note

The specific activity was determined by the dose-dependent inhibition of proliferation of the MPC-11 cell line (mouse plasmocytoma cell line).

Biochem/physiol Actions

Activin-A participates in a diverse array of functions that include; hypothalamic/pituitary/gonadal hormone secretion, insulin secretion; cell growth, differentiation and survival (apoptosis); embryonic patterning and development; wound healing; and inflammation/immune response. It was initially identified as a follicle stimulating hormone/FSH-releasing protein (gonadal hormone), Ling N, et al. (1986) and erythroid differentiation factor (EDF), Schwall R, et al. (1989). The FSH activity is linked to an increase in the population of pituitary gonadotrophs by Katayama T, et al. (1990). In addition to gonadotrophs, activin-A also modifies somatotrophs and lactotrophs, Kitaoka, et al. (1988).

Activin-A stimulates glycogenolysis in isolated rat hepatocytes, Mine T ET. al. (1989) and elevates insulin release from rat pancreatic islets, Verspohl EJ et al. (1993). Activin-A stimulates insulin secretion in rat pancreatic islets, Totsuka Y, et al. (1988).

Follistatin, an activin-binding protein, is a principle regulator of activin activity, de Winter JP, et al. (1996); however during embryogenesis, Cripto is an important noncompetitive activin antagonist that facilitates Nodal signaling, Kelber JA, et al. (2008).

A role for activin-A as a regulator of cell proliferation was recognized by Gonzalez-Manchon C and Vale W. (1989); wherein Act-A inhibited the growth of and induced morphological changes in CHO-KI cells in culture, in a way similar to but less potent than TGF-β.

Activin A is involved with the entire process of embryo development from germ cells thru embryonic development to adult tissues. It stimulates spermatogonial proliferation in germ-Sertoli cell cocultures, Mather JP, et al. (1990) and is a maturation factor for oocytes, Itoh M, et al. (1990). Activin A promotes proliferation of human luteinized preovulation granulose cells (ovarian granulose cells), Rabinovici J, et al. (1990).

Legal Information

HumanKine is a registered trademark of HumanZyme Inc.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Certificate of Origin

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Cell Culture Guide
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