PMID: 6970191Jan 1, 1980Paper

Amphibian intestinal brush border enzymes during thyroxine-induced metamorphosis

Histochemistry
M DauçaD Ménard

Abstract

The development of intestinal brush border hydrolytic activities has been studied during thyroxine-induced metamorphosis of Rana catesbeiana. Alkaline phosphatase activity peaks at 3 and 10 days after the beginning of the thyroxine treatment. The cytochemical observations concerning alkaline phosphatase activity are in agreement with the biochemical data. At the ultrastructural level, alkaline phosphatase activity is particularly evident on the microvilli membranes of the enterocytes in the primary epithelium after 3 days and in the secondary epithelium after 10 days. gamma-Glutamyltranspeptidase exhibits an increase of activity between 7 and 10 days. On the other hand, glucoamylase, maltase, trehalase and leucylnapthylamidase activities decrease during thyroxine treatment, these enzymatic activities being lower than that normally observed after natural metamorphosis. The present study indicates that even though thyroxine is able to induce the morphological differentiation of the intestinal epithelium this hormone is unable to complete the enzymatic load of the new mucosa.

References

Feb 1, 1977·General and Comparative Endocrinology·V H Carver, E Frieden
Oct 1, 1977·General and Comparative Endocrinology·H MiyauchiE Frieden
Nov 1, 1979·General and Comparative Endocrinology·P M Mondou, J C Kaltenbach
Jan 1, 1979·Comparative Biochemistry and Physiology. B, Comparative Biochemistry·M DaucaD Menard
Jan 1, 1970·The Journal of Cell Biology·M A Bonneville, M Weinstock
Feb 28, 1972·Biochimica Et Biophysica Acta·S Schlegel-HaueterG Semenza
Sep 1, 1966·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·J Hugon, M Borgers
Nov 1, 1969·Clinica Chimica Acta; International Journal of Clinical Chemistry·L NaftalinD Tracey
Sep 1, 1969·Analytical Biochemistry·J B Lloyd, W J Whelan
Apr 1, 1962·General and Comparative Endocrinology·E DALE
Aug 1, 1963·General and Comparative Endocrinology·J RAPOLA
Jan 1, 1964·Analytical Biochemistry·A DAHLQVIST
Jan 1, 1946·The Anatomical Record·A C TAYLOR, J J KOLLROS
Jan 1, 1946·Journal of Morphology·A H STENGER, H A CHARIPPER

❮ Previous
Next ❯

Citations

Aug 21, 2007·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Atsuko Ishizuya-Oka, Yun-Bo Shi
Jul 1, 1983·Cell Biochemistry and Function·N Borgers, A Verheyen
May 31, 2019·Frontiers in Endocrinology·Laurent M Sachs, Daniel R Buchholz

❮ Previous
Next ❯

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.