We investigated the intracellular localization of CRH in transiently transfected COS-7 cells expressing the full-length rat corticotropin-releasing hormone (CRH) precursor cDNA. CRH synthesized by transfected COS-7 cells is mainly stored intracellularly. In contrast, CHO-K1 cells expressing the same CRH precursor stored and released equal amounts of immunoreactive (IR)-CRH. Ultrastructural analysis revealed that CRH is stored in electron-dense aggregates in the RER of transiently transfected COS-7 cells and does not migrate into the Golgi apparatus. On the basis of the different intracellular localization, storage, and release of CRH in COS-7 and CHO-K1 cells, we hypothesize that the intracellular trafficking of CRH within the constitutive secretory pathway for protein secretion not only depends on its primary amino acid sequence but might also be influenced by intracellular conditions or factors.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1177/002215549804601012 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Phenolic and Iridoid Glycosides from L. and Their Effects on the α, δ, and γ Subtypes of the PPAR System-Including the Discovery of the Novel Phenylethanoid Cardiaphenyloside A and the Most Active 7-Chloro-6-desoxy-harpagide.
Molecules
January 2025
Department of Pharmaceutical Biology, Leipzig University, Johannisallee 21, 04103 Leipzig, Germany.
L. is known in Europe for its cardioactivity-also in interrelation with known risk factors of the metabolic syndrome-just as Houtt. in East Asia; however, up to now, no active constituents could be identified.
View Article and Find Full Text PDFHGS Promotes Tumor Growth, Whereas the Coiled-Coil Domain and Its Oligopeptide of HGS Suppress It.
Int J Mol Sci
January 2025
Biomembrane Group, Tokyo Metropolitan Institute of Medical Science, 6-1-2, Kamikitazawa, Setagaya-Ku, Tokyo 113-8613, Japan.
We previously isolated a cDNA clone for galactosylceramide expression factor 1, which is the rat homologue of hepatocyte-growth-factor-regulated tyrosine kinase substrate (HGS) and induces galactosylceramide expression and morphological changes in COS-7 cells, and reported that overexpression of HGS induced morphological changes in canine kidney epithelial MDCK cells. HGS is a component of the endosomal sorting complexes required for transport machinery that mediates endosomal multivesicle body formation. In this study, the overexpression of HGS induced epithelial-mesenchymal transition and caused transformation in MDCK cells, whereas the overexpression of a coiled-coil domain of HGS inhibited induction of epithelial-mesenchymal transition by HGF stimulation.
View Article and Find Full Text PDFProtective Effects of Chitosan Oligosaccharide Against Lipopolysaccharide-Induced Inflammatory Response and Oxidative Stress in Bovine Mammary Epithelial Cells.
Mar Drugs
January 2025
The Key Laboratory of Animal Genetic Resource and Breeding Innovation, College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, China.
Chitosan oligosaccharide (COS) is receiving increasing attention as a feed additive in animal production. COS has a variety of biological functions, including anti-inflammatory and antioxidant activities. Mastitis is a major disease in dairy cows that has a significant impact on animal welfare and production.
View Article and Find Full Text PDFSelection and Engineering of Novel Brighter Bioluminescent Reporter Gene and Color- Tuning Luciferase for pH-Sensing in Mammalian Cells.
Biosensors (Basel)
January 2025
Laboratory of Biochemistry, Molecular Biology and Bioluminescent Systems Technology, Department of Physics, Chemistry and Mathematics, Federal University of Sao Carlos (UFSCAR), Rodovia João Leme dos Santos, km 110, Sorocaba 18052-780, SP, Brazil.
Firefly luciferases have been extensively used for bioanalytical applications, including their use as bioluminescent reporters, biosensors, and for bioimaging biological and pathological processes. Due to their intrinsic pH- sensitivity, in recent years we have demonstrated that firefly luciferases can also be harnessed as color- tuning sensors of intracellular pH. However, it is known that mammalian cells require temperatures higher than 36 °C, which red-shift the bioluminescence spectra of most firefly luciferases, decreasing their activities and the resolution of ratiometric pH analysis.
View Article and Find Full Text PDFDevelopment and application of 3D cardiac tissues derived from human pluripotent stem cells.
Drug Metab Pharmacokinet
January 2025
Department of Clinical Regenerative Medicine, Fujita Medical Innovation Center Tokyo, Fujita Health University, Tokyo, Japan; Department of Cardiology, Keio University School of Medicine, Tokyo, Japan. Electronic address:
Recently human pluripotent stem cell-derived cardiomyocytes (hPSC-CMs) have become an attractive platform to evaluate drug responses for cardiotoxicity testing and disease modeling. Moreover, three-dimensional (3D) cardiac models, such as engineered heart tissues (EHTs) developed by bioengineering approaches, and cardiac spheroids (CSs) formed by spherical aggregation of hPSC-CMs, have been established as useful tools for drug discovery and transplantation. These 3D models overcome many of the shortcomings of conventional 2D hPSC-CMs, such as immaturity of the cells.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!