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Combined immunohistochemistry for gonadotropin-releasing hormone (GnRH) and pro-GnRH, and in situ hybridization for GnRH messenger ribonucleic acid in rat brain. 1989

O K Ronnekleiv, and B R Naylor, and C T Bond, and J P Adelman
Department of Physiology, Vollum Institute for Advanced Biomedical Research, Oregon Health Sciences University, Portland 97201.

Experiments were performed to explore the distribution of neurons containing pro-GnRH and GnRH in the rat brain and to determine the correspondence of immunoreactive peptides and pro-GnRH mRNA. Using avidin-biotin immunohistochemistry on free floating vibratome sections it was found that pro-GnRH- and GnRH-containing cells exhibited a similar distribution within the preoptic area-basal hypothalamus region. Within individual neurons pro-GnRH was primarily detected in the cell soma and proximal fibers, whereas the decapeptide was present in cells, fibers, and nerve terminals. Combined avidin-biotin immunohistochemistry for GnRH or pro-GnRH peptides and in situ hybridization for pro-GnRH mRNA using a cRNA probe revealed that the peptides and mRNA could be detected in the same cells. In both male and female rats pro-GnRH mRNA was localized primarily in GnRH-containing cells; however, not all immunoreactive GnRH neurons contained detectable levels of pro-GnRH mRNA, and not all neurons containing pro-GnRH mRNA contained GnRH peptides. In proestrous females a close correlation existed between the total number of neurons containing GnRH and those containing pro-GnRH mRNA (r = 0.84-0.9), while in intact male rats the correlation was not as high (r = 0.56). These results document the distribution of pro-GnRH and GnRH in the rat preoptic area-basal hypothalamus and describe the extent of colocalization of GnRH peptide and pro-GnRH mRNA in proestrous females and intact male rats. Further work will determine how each of the molecular components is regulated during different reproductive states.

UI MeSH Term Description Entries
D007150 Immunohistochemistry Histochemical localization of immunoreactive substances using labeled antibodies as reagents. Immunocytochemistry,Immunogold Techniques,Immunogold-Silver Techniques,Immunohistocytochemistry,Immunolabeling Techniques,Immunogold Technics,Immunogold-Silver Technics,Immunolabeling Technics,Immunogold Silver Technics,Immunogold Silver Techniques,Immunogold Technic,Immunogold Technique,Immunogold-Silver Technic,Immunogold-Silver Technique,Immunolabeling Technic,Immunolabeling Technique,Technic, Immunogold,Technic, Immunogold-Silver,Technic, Immunolabeling,Technics, Immunogold,Technics, Immunogold-Silver,Technics, Immunolabeling,Technique, Immunogold,Technique, Immunogold-Silver,Technique, Immunolabeling,Techniques, Immunogold,Techniques, Immunogold-Silver,Techniques, Immunolabeling
D008297 Male Males
D009474 Neurons The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM. Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D009693 Nucleic Acid Hybridization Widely used technique which exploits the ability of complementary sequences in single-stranded DNAs or RNAs to pair with each other to form a double helix. Hybridization can take place between two complimentary DNA sequences, between a single-stranded DNA and a complementary RNA, or between two RNA sequences. The technique is used to detect and isolate specific sequences, measure homology, or define other characteristics of one or both strands. (Kendrew, Encyclopedia of Molecular Biology, 1994, p503) Genomic Hybridization,Acid Hybridization, Nucleic,Acid Hybridizations, Nucleic,Genomic Hybridizations,Hybridization, Genomic,Hybridization, Nucleic Acid,Hybridizations, Genomic,Hybridizations, Nucleic Acid,Nucleic Acid Hybridizations
D010906 Pituitary Hormone-Releasing Hormones Peptides, natural or synthetic, that stimulate the release of PITUITARY HORMONES. They were first isolated from the extracts of the HYPOTHALAMUS; MEDIAN EMINENCE; PITUITARY STALK; and NEUROHYPOPHYSIS. In addition, some hypophysiotropic hormones control pituitary cell differentiation, cell proliferation, and hormone synthesis. Some can act on more than one pituitary hormone. Hormones, Pituitary Hormone Releasing,Hypophysiotropic Hormones,Hypothalamic Hypophysiotropic Hormone,Hypothalamic Releasing Factor,Hypothalamic Releasing Hormone,Hypothalamic Releasing Hormones,Hormone, Hypothalamic Hypophysiotropic,Hormones, Hypophysiotropic,Hypophysiotropic Hormone, Hypothalamic,Pituitary Hormone Releasing Hormones,Releasing Hormone, Hypothalamic
D011498 Protein Precursors Precursors, Protein
D011919 Rats, Inbred Strains Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding. August Rats,Inbred Rat Strains,Inbred Strain of Rat,Inbred Strain of Rats,Inbred Strains of Rats,Rat, Inbred Strain,August Rat,Inbred Rat Strain,Inbred Strain Rat,Inbred Strain Rats,Inbred Strains Rat,Inbred Strains Rats,Rat Inbred Strain,Rat Inbred Strains,Rat Strain, Inbred,Rat Strains, Inbred,Rat, August,Rat, Inbred Strains,Rats Inbred Strain,Rats Inbred Strains,Rats, August,Rats, Inbred Strain,Strain Rat, Inbred,Strain Rats, Inbred,Strain, Inbred Rat,Strains, Inbred Rat
D001923 Brain Chemistry Changes in the amounts of various chemicals (neurotransmitters, receptors, enzymes, and other metabolites) specific to the area of the central nervous system contained within the head. These are monitored over time, during sensory stimulation, or under different disease states. Chemistry, Brain,Brain Chemistries,Chemistries, Brain
D005260 Female Females
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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