The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
Gene Review

IGFBP4  -  insulin-like growth factor binding protein 4

Ovis aries

 
 
Welcome! If you are familiar with the subject of this article, you can contribute to this open access knowledge base by deleting incorrect information, restructuring or completely rewriting any text. Read more.
 

Disease relevance of IGFBP-4

  • Circulating IGF-I is positively correlated with fetal weight (r = 0.66, P = 0.03), circulating IGFBP-3 (r = 0.54, P = 0.01) and IGFBP-4 (r = 0.52, P = 0.01) [1].
 

High impact information on IGFBP-4

  • C-terminal, but not N-terminal, proteolytic fragments derived from IGFBP-3 (aa 161-264), as well as heparin-binding domain-containing peptides derived from the C-terminal domain of IGFBP-3 and -5 also induced the inhibition of IGFBP-4 proteolytic degradation [2].
  • Other heparin-binding domain-containing peptides derived from the connective tissue growth factor (CTGF) and from proteins not related to IGFBP, heparan/heparin interacting protein (HIP) and vitronectin, but not from p36 subunit of annexin II tetramer, inhibited IGFBP-4 degradation [2].
  • The addition of an excess of IGF-I enhanced IGFBP-4 proteolytic degradation, whereas addition of IGFBP-2 or -3 or monoclonal antibodies against IGF-I and -II dose dependently inhibited IGFBP-4 proteolytic degradation [2].
  • This inhibition might be partly mediated by direct interaction of IGFBP-4 proteinase(s) and heparin-binding domain within the C-terminal region from IGFBP-3 and -5 [2].
  • Follicular fluid from preovulatory follicles contains proteolytic activity degrading exogenous IGFBP-4 [2].
 

Biological context of IGFBP-4

 

Anatomical context of IGFBP-4

 

Associations of IGFBP-4 with chemical compounds

  • Estradiol increased serum IGF-I, IGFBP-3, and IGFBP-4 throughout the treatment period, but it did not influence other IGFBPs in serum [8].
  • In fetal plasma, the circulating IGF-II/mannose-6-phosphate (M6P) receptor, IGFBP-3 and IGFBP-4 were reduced during starvation [9].
  • While circulating IGF-II/M6P receptor and IGFBP-4 levels were increased following the fetal insulin or glucose infusion, IGFBP-3 was unchanged and increased only after 48 h of maternal refeeding [9].
  • The concurrent provision of the C19 aromatase substrate androstenedione (10(-7) mol/L) to the culture medium from 72 hours enhanced the inhibitory effect of FSH (100 ng/mL) for a maximal decrement in IGFBP-4 transcripts of 49% (P < .05) [6].
 

Other interactions of IGFBP-4

 

Analytical, diagnostic and therapeutic context of IGFBP-4

  • Conditioned culture media were subjected to Western ligand blot before and after immunoprecipitation with a rat IGFBP-4-directed polyclonal antiserum (alpha-B104) [6].
  • A modest, biphasic, time-dependent response was noted for IGFBP-4 transcripts after treatment with high-dose FSH (100 ng/mL), an effect characterized by 24- and 48-hour increments (51% [P < .05] and 26% [P = .052] over untrated controls, respectively) and a 72-hour decrement (25%; P = .16) [6].

References

  1. Circulating insulin-like growth factors (IGFs), IGF-binding proteins (IGFBPs) and tissue mRNA levels of IGFBP-2 and IGFBP-4 in the ovine fetus. Carr, J.M., Owens, J.A., Grant, P.A., Walton, P.E., Owens, P.C., Wallace, J.C. J. Endocrinol. (1995) [Pubmed]
  2. Insulin-like growth factor binding protein-4 proteolytic degradation in ovine preovulatory follicles: studies of underlying mechanisms. Mazerbourg, S., Zapf, J., Bar, R.S., Brigstock, D.R., Lalou, C., Binoux, M., Monget, P. Endocrinology (1999) [Pubmed]
  3. Pregnancy-specific alterations in the expression of the insulin-like growth factor system during early placental development in the ewe. Reynolds, T.S., Stevenson, K.R., Wathes, D.C. Endocrinology (1997) [Pubmed]
  4. Insulin-like growth factor (IGF)-binding protein production by primary cultures of ovine granulosa and theca cells. The effects of IGF-I, gonadotropin, and follicle size. Armstrong, D.G., Hogg, C.O., Campbell, B.K., Webb, R. Biol. Reprod. (1996) [Pubmed]
  5. Insulin-like growth factors and their binding proteins in the ovine oviduct during the oestrous cycle. Stevenson, K.R., Wathes, D.C. J. Reprod. Fertil. (1996) [Pubmed]
  6. Characterization and hormonal regulation of granulosa cell-derived insulin-like growth factor binding protein-4. Choi, D., Putowski, L.T., Fielder, P.J., Rosenfeld, R.G., Rohan, R.M., Adashi, E.Y. J. Soc. Gynecol. Investig. (1996) [Pubmed]
  7. The IGF system in the neonatal ovine uterus. Hayashi, K., Carpenter, K.D., Welsh, T.H., Burghardt, R.C., Spicer, L.J., Spencer, T.E. Reproduction (2005) [Pubmed]
  8. Estradiol increases relative amounts of insulin-like growth factor binding protein (IGFBP)-3 in serum and expression of IGFBP-2 in anterior pituitaries of ewes. Clapper, J.A., Snyder, J.L., Roberts, A.J., Hamernik, D.L., Moss, G.E. Biol. Reprod. (1998) [Pubmed]
  9. Circulating insulin-like growth factor II/mannose-6-phosphate receptor and insulin-like growth factor binding proteins in fetal sheep plasma are regulated by glucose and insulin. Gallaher, B.W., Oliver, M.H., Eichhorn, K., Kessler, U., Kiess, W., Harding, J.E., Gluckman, P.D., Breier, B.H. Eur. J. Endocrinol. (1994) [Pubmed]
 
WikiGenes - Universities