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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Vascular Alterations Underlie Developmental Problems Manifested in Cloned Cattle before or after Birth

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Author(s):
Maiorka, Paulo Cesar [1] ; Favaron, Phelipe Oliveira [2] ; Mess, Andrea Maria [2] ; dos Santos, Caio Rodrigues [1] ; Alberto, Miryan Lanca [2] ; Meirelles, Flavio Vieira [3] ; Miglino, Maria Angelica [2]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Sch Vet Med, Dept Pathol, Sao Paulo - Brazil
[2] Univ Sao Paulo, Sch Vet Med, Dept Surg, Sao Paulo - Brazil
[3] Univ Sao Paulo, Fac Anim Sci & Food Engn, Pirassununga - Brazil
Total Affiliations: 3
Document type: Journal article
Source: PLoS One; v. 10, n. 1 JAN 13 2015.
Web of Science Citations: 6
Abstract

Although assisted reproductive techniques are commonly applied in humans and animals, they are frequently associated with major developmental deficits and reduced viability. To explore abnormalities associated with cloning or nuclear transfer (NT) as the most invasive of these methods, we used a bovine model to characterize abnormalities. Detailed necropsy examinations were done on 13 calves that died soon after birth; in addition, we included data from embryos and fetuses (produced by NT) that terminated prematurely. Bovine clones that survived until the neonatal period differed quantitatively and qualitatively from in-vivo-derived cattle. Although alterations affected a variety of organs (e.g. heart, lung and liver), there was a clear association with abberant vascular developmental during the early intrauterine phase. Therefore, we concluded that vascular problems were key alterations induced by cloning (presumably via epigenetic modifications). (AU)