Visualization of gene expression of short and long forms of prolactin receptor in rat digestive tissues.
Several effects of prolactin have been characterized in various tissues of the gastrointestinal tract. In the present study, the expression of short and long forms of prolactin receptor was explored and quantified in the digestive tract and correlated to the prolactin specific functions. Sections of all digestive tissues were analyzed by in situ hybridization, using 35S-labeled oligoprobes unique to each form of receptor. Macroautoradiogram signals were quantified and expressed in arbitrary units. In rat liver, prolactin receptor mRNAs are expressed to a much greater degree in females than in males. The short-form transcript is significantly expressed to a greater degree in liver, whereas the long form predominates in the pancreas and esophagus. In the remainder of the gastrointestinal tract, there is an equivalent distribution of short- and long-form transcripts. Relatively high signal intensities are seen in the stomach, duodenum, jejunum, ileum, and colon, whereas the rectum is essentially negative. The identification of prolactin receptor gene expression to limited regions should help establish specific functions associated with this hormone in the digestive tissues.
Ouhtit
A
A
Centre National de la Recherche Scientifique Unité de Recherche Associée 1454, Neuroendocrinologie, Faculté de Médecine Lyon-Sud, Oullins, France.
Kelly
P A
PA
Morel
G
G
D000818:Animals; D016375:Antisense Elements (Genetics); D001345:Autoradiography; D001483:Base Sequence; D004064:Digestive System / Q000166:cytology / Q000378:metabolism*; D004947:Esophagus / Q000166:cytology / Q000378:metabolism; D005260:Female; D005753:Gastric Mucosa / Q000378:metabolism; D015870:Gene Expression; D017403:In Situ Hybridization; D007421:Intestine, Small / Q000166:cytology / Q000378:metabolism; D008099:Liver / Q000166:cytology / Q000378:metabolism; D008297:Male; D008969:Molecular Sequence Data; D015345:Oligonucleotide Probes; D009928:Organ Specificity; D010179:Pancreas / Q000166:cytology / Q000378:metabolism*; D012333:RNA, Messenger / Q000032:analysis / Q000096:biosynthesis*; D051381:Rats; D017208:Rats, Wistar; D011981:Receptors, Prolactin / Q000096:biosynthesis*; D012044:Regression Analysis; D012737:Sex Factors; D013270:Stomach / Q000166:cytology; D013462:Sulfur Radioisotopes
D016375:Antisense Elements (Genetics); D015345:Oligonucleotide Probes; D012333:RNA, Messenger; D011981:Receptors, Prolactin; D013462:Sulfur Radioisotopes