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ZFIN ID: ZDB-PUB-120907-8
HtrA1 Is a Novel Antagonist Controlling Fibroblast Growth Factor (FGF) Signaling via Cleavage of FGF8
Kim, G.Y., Kim, H.Y., Kim, H.T., Moon, J.M., Kim, C.H., Kang, S., and Rhim, H.
Date: 2012
Source: Molecular and cellular biology   32(21): 4482-4492 (Journal)
Registered Authors: Kim, Cheol-Hee, Kim, Hyun-Taek
Keywords: none
MeSH Terms:
  • Animals
  • Body Patterning/genetics
  • Fibroblast Growth Factor 8/genetics
  • Fibroblast Growth Factor 8/metabolism*
  • Gene Expression Regulation, Developmental
  • Morpholinos/genetics
  • Phenotype
  • RNA, Messenger/genetics
  • RNA, Messenger/metabolism
  • Serine Endopeptidases/deficiency
  • Serine Endopeptidases/metabolism*
  • Signal Transduction/genetics
  • Zebrafish/embryology
  • Zebrafish Proteins/deficiency
  • Zebrafish Proteins/genetics
  • Zebrafish Proteins/metabolism*
PubMed: 22949504 Full text @ Mol. Cell. Biol.

Accumulating evidence suggests that High temperature requirement A1 (HtrA1) is involved in modulating crucial cellular processes and implicated in life-threatening diseases, such as cancer and neuropathological disorders; however, the exact functions of this protease in vivo remain unknown. Here, we show that loss of HtrA1 function increases Fibroblast growth factor (FGF) 8 mRNA levels and triggers activation of FGF signaling, resulting in dorsalization in zebrafish embryos. Notably, HtrA1 directly cleaves FGF8 in the extracellular region, and this cleavage results in decreased activation of FGF signaling that is essential for many physiological processes. Therefore, HtrA1 is indispensable for dorsoventral patterning in early zebrafish embryogenesis and serves as a key upstream regulator of FGF signaling through the control of FGF levels. Furthermore, this study offers insight into new strategies to control human diseases associated with HtrA1 and FGF signaling.