File(s) not publicly available
Neonatal lipopolysaccharide exposure impairs sexual development and reproductive success in the Wistar rat
journal contribution
posted on 2011-05-01, 00:00 authored by A K Walker, S A Hiles, Luba SominskyLuba Sominsky, E A McLaughlin, D M HodgsonWe investigated, in rats, whether neonatal exposure to bacterial lipopolysaccharide (LPS) impairs sexual development, sexual decline, and reproductive behaviour in later life. Rats were administered either LPS (Salmonella enterica, serotype enteritidis, 0.05. mg/kg, ip) or saline (equivolume) on days 3 and 5 postpartum. The immediate and long-term effect of treatment on HPA and HPG hormones, testicular morphology, and mating behaviour was assessed. Neonatal LPS exposure induced a significant increase in corticosterone compared to controls, as well as reduced testosterone and LH in males and LH in females immediately following neonatal drug exposure. Neonatal LPS exposure disrupted the normal weight-to-age ratio of puberty onset in males and females, and impaired sexual performance in adulthood. Reproductive function was reflected in significantly diminished sperm presence in rats that had received neonatal LPS. LPS-treated females exhibited LH suppression during puberty, and males demonstrated testosterone suppression in late adulthood. Testosterone and LH surges during mating were significantly reduced in adult offspring treated with LPS as neonates. Furthermore, animals exposed to neonatal LPS and subsequent stress in adulthood, exhibited significantly blunted corticosterone responses. Morphometric assessment of testes taken from neonates revealed reduced gonocyte genesis immediately following LPS exposure and increased seminiferous disorganisation of the epithelium in these animals in adulthood. This research demonstrates the long-term impact of neonatal bacterial exposure on reproductive success given that early life exposure to bacteria disrupted puberty onset and sexual performance. Associated changes in neuroendocrine functioning suggest a possible mechanism through which a subfertile phenotype may arise. © 2011 Elsevier Inc.
History
Journal
Brain, Behavior, and ImmunityVolume
25Issue
4Pagination
674 - 684Publisher DOI
ISSN
0889-1591Publication classification
C1.1 Refereed article in a scholarly journalUsage metrics
Categories
Keywords
Science & TechnologyLife Sciences & BiomedicineImmunologyNeurosciencesPsychiatryNeurosciences & NeurologyLPSPostnatalSexual behaviourHPG axisHPA axisTestesGonocyte developmentSTRESS-INDUCED SUPPRESSIONPITUITARY-ADRENAL AXISFEMALE RATEARLY-LIFEGONADOTROPIN-SECRETIONPUBERTYADULTHOODENDOTOXINALTERSEXPRESSIONImmunology
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC