Membrane Glycosylation and Circadian Rhythms in Plant Systems and in Animal Normal and Transformed Systems

  • Ghislaine M. Petiau-de Vries

Summary

A review is given on the properties of glycoconjugates subjected to circadian rhythms: proteoglycans, glycosylated hormones, enzymes, glycolipids. Membrane receptors and their ligands which appear to be frequently glycosylated can play a role in circadian rhythmicity. Circadian modulation of the glycoconjugates metabolism and the effect of glycosylation inhibitors on the circadian rhythms will be discussed. Rhodopsin, a photoreceptor, is glycosylated and presents an unusual type of glycosylation. The role of ceramides as second messengers has been demonstrated and could interact with metabolites important for the rhythm. The formation of a spatial structure of macromolecules such as helicoids is a circadian or ultradian process. The importance of circadian rhythms in cancer has been reported in a few cases and suggests a critical analysis of many reports.

Keywords

Chitosan Polysaccharide Serotonin Retina Testosterone 

Abbreviations

Ach

acetylcholine

AChE

acetylcholinesterase

CEA

carcinoembryonic antigen

cAMP

cyclic adenosine 5’-monophosphate

CREM

cAMP -responsive element modulator

ELISA

enzyme-linked immunosorbent assay

EPO

erythropoietin

FSH

follicle stimulating hormone

gal

galactose

galNAc

N-acetylgalactosamine

GH

growth hormone

Glc

glucose

GM1

Gal beta 1–3

GalNAc

beta 1–4

Gal(NeuAc alpha 2–3)

beta 1–4

Glc

beta l’-ceramide

cGMP

cyclic guanosine 5’-monophosphate

5-HT

5-hydroxytryptamine or serotonin

LH

luteinizing hormone

man

mannose

NeuAc

sialic acid

PRL

prolactin

TG

threonine/glycine

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Copyright information

© Springer-Verlag Berlin Heidelberg 1996

Authors and Affiliations

  • Ghislaine M. Petiau-de Vries
    • 1
  1. 1.Chimie Générale IUniversité Libre de BruxellesBruxellesBelgium

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