Growth of rumen papillae in weaned calves is associated with lower expression of insulin-like growth factor-binding proteins 2, 3, and 6

Koki Nishihara, Yutaka Suzuki, Dahye Kim, Sanggun Roh

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This study aimed to characterize the relationship between the growth of rumen papillae in calves and the mRNA expression of insulin-like growth factor-binding proteins (IGFBPs) in the rumen papillae. The length of rumen papillae, the mRNA expression of IGFBPs in rumen papillae by quantitative real-time PCR, and the presence of insulin-like growth factors I and II (IGF-I and II) by immunohistochemistry (IHC) were analyzed in nine Holstein calves divided into three groups: suckling (2 weeks, n = 3), milk-continued (8 weeks, n = 3), and weaned (8 weeks, n = 3). The length of rumen papillae was greater (p < 0.01) in weaned calves than in suckling and milk-continued calves, whereas the expressions of IGFBP2, IGFBP3, and IGFBP6 genes were lower (p < 0.05) in the rumen papillae of weaned calves than in milk-continued calves. Thus, rumen papillae length and IGFBP2, 3, and 6 expressions were negatively correlated. The IHC analysis showed that IGF-I and IGF-II were present in the rumen epithelium of calves. These results suggested that the growth of rumen papillae after weaning is associated with the induction of IGFs by the low levels of IGFBP2, IGFBP3, and IGFBP6.

Original languageEnglish
Pages (from-to)1287-1292
Number of pages6
JournalAnimal Science Journal
Volume90
Issue number9
DOIs
Publication statusPublished - 2019 Sep 1

Keywords

  • insulin-like growth factor-binding proteins
  • insulin-like growth factors
  • rumen papillae growth

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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