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Vertebrate reproductive science and technology
RESEARCH ARTICLE

Effect of intra-uterine growth restriction on long-term fertility in boars

Yan Lin A B D , Xu Cheng A , Peter Sutovsky B C , De Wu A , Lian-Qiang Che A , Zheng-Feng Fang A , Sheng-Yu Xu A , Bo Ren A and Hong-Jun Dong A
+ Author Affiliations
- Author Affiliations

A Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education of China, Institute of Animal Nutrition, Sichuan Agricultural University, 46 Xing-kang Road, Ya’an, 62500,China.

B Division of Animal Sciences, University of Missouri, 920 East Campus Drive, Columbia, MO 65211, USA.

C Department of Obstetrics, Gynecology and Women’s Health, University of Missouri, Columbia, MO 65211, USA.

D Corresponding author. Email: linyan936@163.com

*These authors contributed equally to this work.

Reproduction, Fertility and Development 29(2) 374-382 https://doi.org/10.1071/RD15130
Submitted: 10 April 2015  Accepted: 18 July 2015   Published: 21 August 2015

Abstract

The present study assessed the effect of birthweight on reproductive performance, including a possible mechanism, in male pigs. Ten newborn male piglets, including five normal birthweight (NBW) piglets and five intra-uterine growth restricted (IUGR) piglets, were used in the study. All piglets were weaned on Day 28 and fed the same diet during the experiment (10 months). Average daily weight gain, feed intake and the feed conversion ratio were higher in NBW than IUGR piglets. Similarly, testis volume and the number of Leydig and Sertoli cells in the distal portion of the testes were higher in NBW than IUGR piglets (P < 0.05). Semen volume (P < 0.05) and the total number of spermatozoa per ejaculate (P = 0.08) were lower in IUGR boars. Testosterone concentrations on Day 141 and prostaglandin E2 concentrations on Days 82 and 141 were higher in IUGR than NBW boars (P < 0.05). The malondialdehyde content of seminal plasma was higher in IUGR boars, whereas sperm glutathione peroxidase activity was lower in IUGR versus NBW boars (P < 0.05). Expression of DNA methyltransferase (Dnmt) genes Dnmt1, Dnmt3a, histone-lysine N-methyltransferase (Suv39h2), and lysine (K)-specific demethylase Kdm4a was upregulated in testes from IUGR boars. These findings suggest that growth restriction affects sperm production via reproductive organ development and epigenetic regulation.

Additional keywords: epigenetic, normal birthweight, sperm, testis.


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