NDLI: Previtellogenic oocyte growth and transcriptional changes of steroidogenic enzyme genes in immature female Atlantic cod (Gadus morhua L.) after exposure to the androgens 11-ketotestosterone and testosterone.

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Previtellogenic oocyte growth and transcriptional changes of steroidogenic enzyme genes in immature female Atlantic cod (Gadus morhua L.) after exposure to the androgens 11-ketotestosterone and testosterone.

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Previtellogenic oocyte growth and transcriptional changes of steroidogenic enzyme genes in immature female Atlantic cod (Gadus morhua L.) after exposure to the androgens 11-ketotestosterone and testosterone.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kortner, Trond M. Rocha, Eduardo Arukwe, Augustine
Description	Country affiliation: Norway Author Affiliation: Kortner TM ( Department of Biology, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, 7491 Trondheim, Norway.)
Abstract	We have studied in vivo, the effects of physiological androgen (11-ketotestosterone: 11-KT and testosterone: T) concentrations on the growth of cod previtellogenic oocytes and steroidogenic gene expression patterns. Immature female Atlantic cod were injected three times (days 0, 7 and 14) with 0.05, 0.5 and 5 mg/kg of 11-KT and T. The control group was injected with the carrier solvent (ethanol diluted 1:10 in sunflower oil). Quantitative histological analyses demonstrated growth and development of previtellogenic oocytes after exposure to androgens. The oocyte developmental effect of androgens was more pronounced in fish receiving 11-KT. Quantitative PCR analysis demonstrated dose- and androgen-specific modulation of mRNA expression for genes involved in steroidogenesis (StAR (steroidogenic acute regulatory) protein, P450scc (P450-mediated cholesterol side-chain cleavage), 20beta-HSD (20beta-hydroxysteroid dehydrogenase)) and cell growth control, namely--opioid growth factor receptor (OGF-R), progesterone receptor protein p23 (PR23P) and apoptosis-inducing TAF9-like domain 1 (TAF9). Messenger RNA species associated with the zona pelucida, namely--the zona pellucida protein A domain (ZPA) and egg envelope glycoprotein (EeG) were modulated based on dose and androgen type. Cyclin-B mRNA expression was not affected by androgen exposure. Interestingly, we showed recently that these transcripts were responsive to in vitro androgen exposure in previtellogenic cod ovary. In conclusion, the present study adds further information regarding the effects of androgens on the development of previtellogenic oocytes, suggesting androgen control of early oocyte growth in cod. The enhanced effects of 11-KT on oocyte growth support our hypothesis that non-aromatizable androgens play significant roles in the regulation of early previtellogenic oocyte growth and development.
File Format	HTM / HTML
ISSN	10956433
Issue Number	3
Volume Number	152
e-ISSN	15314332
Journal	Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology
Language	English
Publisher	Elsevier
Publisher Date	2009-03-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Physiology Discipline Molecular Biology Cholesterol Side-chain Cleavage Enzyme Genetics Cortisone Reductase Gadus Morhua Oocytes Drug Effects Phosphoproteins Testosterone Pharmacology Transcription, Genetic Androgens Chemistry Animals Cyclin B Dose-response Relationship, Drug Egg Proteins Female Growth & Development Gene Expression Regulation, Developmental Membrane Glycoproteins Rna, Messenger Receptors, Cell Surface Receptors, Opioid Receptors, Progesterone Reverse Transcriptase Polymerase Chain Reaction Tata-binding Protein Associated Factors Analogs & Derivatives Blood Time Factors Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Physiology Molecular Biology Biochemistry Aquatic Science Animal Science and Zoology

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Androgenic modulation of early growth of Atlantic cod (Gadus morhua L.) previtellogenic oocytes and zona radiata-related genes.

Genomic approach in evaluating the role of androgens on the growth of Atlantic cod (Gadus morhua) previtellogenic oocytes.

Characterizing ovarian gene expression during oocyte growth in Atlantic cod (Gadus morhua).

Optimal temperature for growth and feed conversion of immature cod (Gadus morhua L.)

Epidermal growth factor receptor signaling is required for normal ovarian steroidogenesis and oocyte maturation.

Growth and gonadal development in diploid and triploid Atlantic cod (Gadus morhua).

The effects of 11-ketotestosterone on ovarian physiology of previtellogenic captive hapuku (Polyprion oxygeneios).

Genome-wide microarray analysis of Atlantic cod (Gadus morhua) oocyte and embryo

Synthesis of 17,20beta,21-trihydroxypregn-4-en-3-one by ovaries of reproductively mature Atlantic cod Gadus morhua.

Previtellogenic oocyte growth and transcriptional changes of steroidogenic enzyme genes in immature female Atlantic cod (Gadus morhua L.) after exposure to the androgens 11-ketotestosterone and testosterone.

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Previtellogenic oocyte growth and transcriptional changes of steroidogenic enzyme genes in immature female Atlantic cod (Gadus morhua L.) after exposure to the androgens 11-ketotestosterone and testosterone.