Tissue-specific expression of the insulin-like growth factor binding protein (IGFBP) mRNAs in mouse and rat development

Joseph A. Cerro, Anoop Grewal, Teresa L. Wood, John E. Pintar

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

The insulin-like growth factor binding proteins (IGFBPs) are polypeptides which are thought to modulate the bioactivity of IGF-I and IGF-II, and may also have activities independent of the IGFs. The expression patterns of IGFBPs-1, -3, -4, and -6 in midgestational rodents were analyzed using in situ hybridization to begin to characterize the role of these IGFBPs during development. All IGFBPs are expressed at least as early as rat embryonic day 14 (e14), and each has a unique pattern of expression. IGFBP-1 mRNA is expressed by the liver throughout mid and late gestation. IGFBP-3 mRNA is expressed at high levels in the urogenital tract, several muscle groups, and the nasal epithelia. IGFBP-3 transcripts are also expressed at lower levels by many non-neural tissue types, including the liver, stomach, and heart. IGFBP-4 is abundantly expressed by many tissues in the developing embryo, with the notable exceptions of the spinal cord, specific cartilage groups, and the thymic cortex. IGFBP-6 is expressed in the liver by e14, and also by a previously unrecognized cell population surrounding developing cartilage. Taken together these observations suggest distinct roles in development for each of the IGFBPs.

Original languageEnglish (US)
Pages (from-to)189-198
Number of pages10
JournalRegulatory Peptides
Volume48
Issue number1-2
DOIs
StatePublished - Oct 20 1993

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physiology
  • Endocrinology
  • Clinical Biochemistry
  • Cellular and Molecular Neuroscience

Keywords

  • Embryogenesis
  • IGF
  • In situ hybridization
  • Liver

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