title: Gestational and neonatal-onset hypothyroidism alters androgen receptor status in rat prostate glands at adulthood.
abstract: BACKGROUND
  Infertility associated with congenital and early childhood hypothyroidism is an important reproductive health problem in men. Nevertheless, the exact mechanism underlying hypothyroidism-induced changes in the prostate gland, an androgen-dependent organ that contributes a significant portion of the seminal plasma remains obscure. The present study tested the hypothesis "transient gestational- or neonatal-onset hypothyroidism may have duration dependent and lobe specific effect on androgen receptor (AR) status in the prostate glands of adult rats."
  
  
  METHODS
  Hypothyroidism was induced in pregnant and lactating rats by feeding 0.05% methimazole (MMI) through drinking water during fetal and neonatal milestones of testicular and prostatic development. Pregnant dams had MMI exposure from 9th day post-coitum (dpc) to 14 dpc (group II) or 21 dpc (group III). Lactating mothers had MMI exposure from day 1 post-partum (dpp) to 14 dpp (group IV) or up to 29 dpp (group V). AR status in the dorsolateral and ventral prostate lobes (DLP and VP) of the pups was assessed by RT-PCR, western blot and radio receptor assay.
  
  
  RESULTS
  AR mRNA expression consistently decreased in the DLP of all groups, whereas it increased in VP of group III and V rats. AR protein consistently decreased in both DLP and VP of all experimental rats. AR nuclear ligand-binding activity diminished in groups II and IV, whereas it increased in groups III and V.
  
  
  CONCLUSIONS
  The results obtained support the proposed hypothesis and indicate that an optimum thyroid activity during pre- and neonatal period determines AR status in the prostate glands at adulthood.
authors.affiliation: Department of Endocrinology, Dr. ALM Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai, Tamil Nadu, India. aruldhasmm@gmail.com
authors.forename: Michael Maria
authors.initials: MM
authors.lastname: Aruldhas
authors.forename: Neelamohan
authors.initials: N
authors.lastname: Ramalingam
authors.forename: Anbalagan
authors.initials: A
authors.lastname: Jaganathan
authors.forename: Arokya Mary
authors.initials: AM
authors.lastname: John Sashi
authors.forename: Jone Arulrajadurai
authors.initials: JA
authors.lastname: Stanley
authors.forename: Arumugam Suriyam
authors.initials: AS
authors.lastname: Nagappan
authors.forename: Jyothilakshmi
authors.initials: J
authors.lastname: Vasavan
authors.forename: Annapoorna
authors.initials: A
authors.lastname: Kannan
authors.forename: Venkatesh Nagamangalam
authors.initials: VN
authors.lastname: Seshadri
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D000831:Animals, Newborn; D015153:Blotting, Western; D004958:Estradiol / Q000097:blood; D005260:Female; D007037:Hypothyroidism / Q000139:chemically induced / Q000378:metabolism*; D008297:Male; D008713:Methimazole; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects / Q000378:metabolism*; D011467:Prostate / Q000378:metabolism*; D011863:Radioimmunoassay; D051381:Rats; D017208:Rats, Wistar; D011944:Receptors, Androgen / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013739:Testosterone / Q000097:blood; D013972:Thyrotropin / Q000097:blood; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D011944:Receptors, Androgen; D014284:Triiodothyronine; D013739:Testosterone; D004958:Estradiol; D008713:Methimazole; D013972:Thyrotropin; D013974:Thyroxine