title: A comparative study on expression profile of developmentally important genes during pre-implantation stages in buffalo hand-made cloned embryos derived from adult fibroblasts and amniotic fluid derived stem cells.
abstract: Abnormal gene expression in somatic cell nuclear transfer embryos due to aberrant epigenetic modifications of the donor nucleus may account for much of the observed diminished viability and developmental abnormalities. The present study compared the developmentally important gene expression pattern at 4-cell, 8- to 16-cell, morula, and blastocyst stages of buffalo nuclear transfer (NT) embryos from adult fibroblasts (AFs) and amniotic fluid stem cells (AFSCs). In vitro fertilized embryos were used as control embryos. Alterations in the expression pattern of genes implicated in transcription and pluripotency (OCT4, STAT3, NANOG), DNA methylation (DNMT1, DNMT3A), histone deacetylation (HDAC2), growth factor signaling, and imprinting (IGF2, IGF2R), apoptosis (BAX, BCL2), oxidative stress (MnSOD), metabolism (GLUT1) regulation were observed in cloned embryos. The expression of transcripts in AFSC-NT embryos more closely followed that of the in vitro fertilized embryos compared with AF-NT embryos. It is concluded that AFSCs with a relatively undifferentiated genome may serve as suitable donors which could be reprogrammed more efficiently to reactivate expression of early embryonic genes in buffalo NT.
authors.affiliation: Division of Animal Physiology and Reproduction, ICAR-Central Institute for Research on Buffaloes, Hisar, 125001, India. sadeeshcirb@gmail.com.
authors.forename: Sadeesh
authors.initials: S
authors.lastname: Em
authors.affiliation: Department of Veterinary Physiology and Biochemistry, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, 125004, India.
authors.forename: Fozia
authors.initials: F
authors.lastname: Shah
authors.affiliation: Division of Biochemistry, ICAR-Indian Veterinary Research Institute, Bareilly, 243122, India.
authors.forename: Meena
authors.initials: M
authors.lastname: Kataria
authors.affiliation: Division of Animal Physiology and Reproduction, ICAR-Central Institute for Research on Buffaloes, Hisar, 125001, India.
authors.forename: P S
authors.initials: PS
authors.lastname: Yadav
keywords: Adult fibroblasts; Amniotic fluid stem cells; Buffalo; Gene expression; Hand-made cloning