AI Article Synopsis
- The rat Bone/Liver/Kidney/Placenta Alkaline Phosphatase (ALP) gene can produce two different transcripts from two promoters that are 25 kb apart but share the same coding sequence.
- Researchers used techniques like PCR, RNase protection, and northern blot analysis to study these transcripts in various rat tissues and cells.
- Findings revealed that the upstream promoter is mainly active in calvariae and osteogenic sarcoma cells, while the downstream promoter is more active in the kidney; dexamethasone treatment increases ALP activity and the upstream promoter's transcript levels in osteogenic cells.
Article Abstract
The rat Bone/Liver/kidney/Placenta Alkaline Phosphatase (ALP) is transcribed from two alternative promoters spaced over 25 kb apart, resulting in two variant transcripts that are identical in their coding sequence. We investigated the steady-state levels of the two variant transcripts in various rat tissues and cell lines using the polymerase chain reaction (PCR) amplification for RNA phenotyping, RNase protection, and northern blot analysis. Our results demonstrate that ALP transcripts from the upstream promoter are preferentially expressed in calvariae, and are almost exclusively expressed in ROS17/2.8 osteogenic sarcoma cells. In contrast, the downstream promoter is preferentially expressed in kidney. Moreover, the increase in ALP activity and mRNA levels following dexamethasone treatment of ROS17/2.8 cells is correlated with an increase in the level of transcripts from the upstream promoter. Thus, the two alternative promoters of the rat BLKP ALP gene are involved in cell-specific and dexamethasone-inducible regulation of its expression.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0006-291x(91)90405-v | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Evaluation of the Effect of Bacteriophages and Organic Acids as a Feed Additive to Reduce Salmonella enteritidis in Challenged Chickens.
J Anim Physiol Anim Nutr (Berl)
January 2025
Department Animal Science, Higher Education Complex of Torbat-e Jam, Torbat-e Jam, Iran.
This study aimed to compare the effects of dietary supplementation of bacteriophage (BP) and acidifiers on performance, meat quality, morphology, and intestinal microbiota in chickens challenged and unchallenged with Salmonella enteritidis (SE) and also to investigate the possibility of replacing them in the diet with antibiotics. A total of 1760 male Ross (308) chicks were randomly assigned to 11 dietary treatments (8 pens/with 20 male chickens in each). Dietary treatments were as follows: SE-uninfected (negative control (NC), a basal diet without supplemention; NC+ 500 g/t BP (NBP1); NC+ 1000 g/t BP (NBP2); NC+ 300 mg/kg acidifier A (NAA); NC+ 300 mg/kg acidifier B (NAB)) and SE-infected (positive control (PC), a basal diet without supplemention; PC+ 40 mg/kg Antibiotic enrofloxacin (PA); PC+ 500 g/t BP (PBP1); PC+ 1000 g/t BP (PBP2); PC+ 3000 mg/kg acidifier A (PAA); PC+ 3000 mg/kg acidifier B (PAB)).
View Article and Find Full Text PDFEngineering Resilient CAR T Cells for Immunosuppressive Environment.
Mol Ther
January 2025
Brown Center for Immunotherapy. Indiana University School of Medicine. 975 W. Walnut St., IB554A, Indianapolis, IN 46202. Electronic address:
Chimeric Antigen Receptor (CAR) T cell therapy has revolutionized cancer treatment and is now being explored for other diseases, such as autoimmune disorders. While the tumor microenvironment (TME) in cancer is often immunosuppressive, in autoimmune diseases, the environment is typically inflammatory. Both environments can negatively impact CAR T cell survival: the former through direct suppression, hypoxia, and nutrient deprivation, and the latter through chronic T cell receptor (TCR) engagement, risking exhaustion.
View Article and Find Full Text PDFThe Use of Coffee Cherry Pulp Extract as an Alternative to an Antibiotic Growth Promoter in Broiler Diets.
Animals (Basel)
January 2025
Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand.
Coffee cherry pulp (CCP) is a by-product of coffee bean production. CCP contains amounts of phenolic compounds that are beneficial for animals. This study evaluated the impact of coffee cherry pulp extract (CCPE) supplementation on growth performance, meat quality, carcass characteristics, serum biochemistry, cecum microbial population, intestinal morphology, and immune and antioxidant responses of broilers.
View Article and Find Full Text PDFDuvelisib is a novel NFAT inhibitor that mitigates adalimumab-induced immunogenicity.
Front Pharmacol
January 2025
Center for Pharmacogenetics and Department of Pharmaceutical Sciences, University of Pittsburgh School of Pharmacy, Pittsburgh, PA, United States.
Introduction: TNFα inhibitor (TNFi) immunogenicity in rheumatoid arthritis (RA) is a major obstacle to its therapeutic effectiveness. Although methotrexate (MTX) can mitigate TNFi immunogenicity, its adverse effects necessitate alternative strategies. Targeting nuclear factor of activated T cells (NFAT) transcription factors may protect against biologic immunogenicity.
View Article and Find Full Text PDFKorB switching from DNA-sliding clamp to repressor mediates long-range gene silencing in a multi-drug resistance plasmid.
Nat Microbiol
January 2025
Department of Molecular Microbiology, John Innes Centre, Norwich, UK.
Examples of long-range gene regulation in bacteria are rare and generally thought to involve DNA looping. Here, using a combination of biophysical approaches including X-ray crystallography and single-molecule analysis for the KorB-KorA system in Escherichia coli, we show that long-range gene silencing on the plasmid RK2, a source of multi-drug resistance across diverse Gram-negative bacteria, is achieved cooperatively by a DNA-sliding clamp, KorB, and a clamp-locking protein, KorA. We show that KorB is a CTPase clamp that can entrap and slide along DNA to reach distal target promoters up to 1.
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!