PMID: 2121575Jan 1, 1990Paper

Different expression of the mRNA detected by the cDNA for fetal rat lactase in the jejunum and colon

Gastroentérologie Clinique Et Biologique
I DulucF Raul

Abstract

To study the genetical expression of lactase-phlorizin hydrolase in the jejunum and colon of developing rats we cloned the corresponding cDNA in a cDNA library constructed from the intestinal RNA of fetal rats. The structure of this 6.1 kb-long cDNA was similar to that of the cDNA of adult rabbits and humans, indicating that the enzyme was synthesized as a precursor organized into repeated homologous domains. The mRNA for lactase-phlorizin hydrolase accumulated at a constant level throughout the development in the jejunum despite the decline in lactase activity occurring at weaning. In the colon, the cDNA for lactase-phlorizin hydrolase hybridized to a transcript that was similar in size to the jejunal mRNA. This mRNA was transiently found during the first week after birth. Its rate of accumulation defined the level of lactase activity measured at this stage. We conclude that the expression of lactase-phlorizin hydrolase during the development is essentially regulated at the post-transcriptional level in the jejunum, in contrast to the colon where it is regulated at the pretranslational level.

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.