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The Relationships between Plasma Insulin-like Growth Factor (IGF)-1 and IGF-Binding Proteins (IGFBPs) to Growth Pattern, and Characteristics of Plasma IGFBPs in Steers
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hidari, Hisashi Kang, S. K. Kim, Sung Zoo Seo, Kwon-Il Yoon, Duhak Choi, Yun Jae |
| Copyright Year | 2005 |
| Abstract | This study was conducted to determine the characteristics of IGFBPs in plasma of steers, and to profile the relationship between growth and plasma IGF-1 and IGFBPs with aging in Holstein steers. Four blots of IGFBP at molecular weights of 38-43, 34, 29-32 and 24 kDa bands were detected by western ligand blot assay using 125 I-IGF-1. On the basis of immunoblotting with anti-bovine IGFBP-2 and -3 antiserums, we observed the band for IGFBP-2 at approximately 34 kDa, and the IGFBP-3 band was detected at 38-43 kDa and 34 kDa in adult steers and calves. The IGFBP-3 antiserum used on the blots exhibited significant cross-reactivity with 34 kDa IGFBP-2. Furthermore, the 38-43 kDa IGFBP-3 bands were reduced to a 36 kDa band after deglycosylation, whereas the 34 kDa IGFBP-2 was intact. The plasma IGF-1, IGFBP-3 and other IGFBPs showed stability throughout a whole day. The change in live weight was found to be positively correlated to the plasma IGF-1 concentration (r = 0.6801, n = 64, p<0.05) and plasma IGFBP-3 (r = 0.6321, n = 64, p<0.05), while inversely correlated to plasma IGFBP-2 (r = -0.2919, n = 64, p<0.05). Furthermore, plasma IGF-1 was positively correlated to plasma IGFBP-3 (r = 0.6191, p<0.001), but was not correlated to plasma IGFBP-2. The portion of IGFBP-2 for total IGFBPs in calves was higher than in adult steers (p<0.05) and was decreased with growth, whereas that of IGFBP-3 was increased with increased live weight (p<0.05). The ratio IGFBP-3 for IGFBP-2 (BP-3/BP-2) was increased with growing of liveweight. Therefore, the changes in plasma IGF-1 level with increased liveweight may be related to the changes in plasma IGFBP-3 level and IGFBP-2 may give an important role in anabolic action of IGF-1 with the growth of body during calfhood in Holstein steers. (Asian-Aust. J. Anim. Sci. 2005. Vol 18, No. 11 : 1575-1581) |
| Starting Page | 1575 |
| Ending Page | 1581 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.5713/ajas.2005.1575 |
| Volume Number | 18 |
| Alternate Webpage(s) | https://www.ajas.info/upload/pdf/18_247.pdf |
| Alternate Webpage(s) | https://doi.org/10.5713/ajas.2005.1575 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
