Aberrant gene expression in organs of bovine clones that die within two days after birth

Biology of Reproduction
Shijie LiNing Li

Abstract

Cloning by somatic nuclear transfer is an inefficient process in which some of the cloned animals die shortly after birth and display organ abnormalities. In an effort to determine the possible genetic causes of neonatal death and organ abnormalities, we used real-time quantitative reverse transcription-polymerase chain reaction to examine expression patterns of eight developmentally important genes (PCAF, Xist, FGFR2, PDGFRa, FGF10, BMP4, Hsp70.1, and VEGF) in six organs (heart, liver, spleen, lung, kidney, and brain) of both cloned bovines that died soon after birth (n=9) and normal control calves produced by artificial insemination. In somatic cloning of cattle, fibroblasts have often been used for doner nuclei, and the effect of the age of the fibroblast donor cells on gene expression profiles was investigated. Aberrant expressions of seven genes were found in these clones. The majority of aberrantly expressed genes were common in clones derived from adult fibroblast (AF) and in clones derived from fetal fibroblast (FF) compared to controls, whereas some genes were dysregulated either in AF cell-derived or in FF cell-derived clones. For the studied genes, kidney was the organ least affected by gene dysregulation, and heart ...Continue Reading

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Methods Mentioned

BETA
protein folding
biopsy
genetic
transgenic
Reverse
PCR
electrophoresis
histone acetylation

Software Mentioned

Opticon Monitor
SPSS

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