scholarly journals Localization of retinaldehyde dehydrogenases and retinoid binding proteins to sustentacular cells, glia, Bowman's gland cells, and stroma: Potential sites of retinoic acid synthesis in the postnatal rat olfactory organ

2006 ◽  
Vol 496 (2) ◽  
pp. 149-171 ◽  
Author(s):  
Mary Ann Asson-Batres ◽  
W. Bradford Smith



Author(s):  
Helen B. Everts ◽  
Kathleen A. Silva ◽  
Adriana N. Schmidt ◽  
Susan Opalenikx ◽  
F. Jason Duncan ◽  
...  




1999 ◽  
Vol 55 (11) ◽  
pp. 1850-1857 ◽  
Author(s):  
Barnali Neel Chaudhuri ◽  
Gerard J. Kleywegt ◽  
Isabelle Broutin-L'Hermite ◽  
Terese Bergfors ◽  
Hans Senn ◽  
...  

Retinoids play important roles in diverse cellular processes including growth, cell differentiation and vision. Many natural and synthetic retinoids are used as drugs in dermatology and oncology. A large amount of data has been accumulated on the cellular activity of different synthetic retinoids. They are stabilized and transported inside the cell cytoplasm by binding and transport proteins, such as cellular retinol-binding proteins and cellular retinoic acid binding proteins (CRABPs). The structures of human CRABP II in complex with two different synthetic retinoids, Ro13-6307 and Ro12-7310 (at 2.1 and 2.0 Å resolution, respectively) and of bovine CRABP I in complex with a retinobenzoic acid, Am80 (at 2.8 Å resolution) are described. The binding affinities of human CRABP I and II for the retinoids studied here have been determined. All these compounds have comparable binding affinities (nanomolar range) for both CRABPs. Apart from the particular interactions of the carboxylate group of the retinoids with specific protein groups, each structure reveals characteristic interactions. Studying the atomic details of the interaction of retinoids with retinoid-binding proteins facilitates the understanding of the kinetics of retinoid trafficking inside the cytoplasm.





1993 ◽  
Vol 208 (1) ◽  
pp. 137-147 ◽  
Author(s):  
Michelina Plateroti ◽  
Yula Sambuy ◽  
Fabio Nobili ◽  
Giovanna Bises ◽  
Giuditta Perozzi


1992 ◽  
Vol 46 (5-7) ◽  
pp. 288
Author(s):  
JL Napoli ◽  
PD Fiorella ◽  
MHEM Boerman ◽  
KC Posch


Development ◽  
1993 ◽  
Vol 118 (1) ◽  
pp. 267-282 ◽  
Author(s):  
E. Ruberte ◽  
V. Friederich ◽  
P. Chambon ◽  
G. Morriss-Kay

We have studied the transcript distribution of the retinoic acid receptors (RARs) and the cytoplasmic retinoid binding proteins during embryonic development of the mouse nervous system. Of the three retinoic acid receptors, only RAR-gamma was not expressed in developing neural structures. RAR-beta and RAR-alpha both showed rostral limits of expression in the medulla oblongata equivalent to their patterns of expression in the neuroepithelium of the early hindbrain neural tube. Within their expression domains in the spinal cord and brain, RAR-alpha was ubiquitously expressed, whereas RAR-beta transcripts showed very specific patterns of expression, suggesting that this receptor is involved in mediating retinoic acid-induced gene expression in relation to the development of specific neural structures or pathways. The cytoplasmic binding proteins, cellular retinoic acid binding proteins type I and II (CRABP I and CRABP II) and cellular retinol binding protein type I (CRBP I), were widely distributed in developing neural structures. Their differential spatiotemporal patterns of expression suggest that fine regional control of availability of retinoic acid (RA) to the nuclear receptors plays an important role in organization and differentiation of the nervous system. For instance, expression of CRABP I in the migrating cells that give rise to the olivary and pontine nuclei, which develop abnormally in conditions of retinoid excess, is consistent with observations from a variety of other systems indicating that CRABP I limits the access of RA to the nuclear receptors in normal physiological conditions. Similarly, expression of CRBP I in the choroid plexuses, which develop abnormally in conditions of vitamin A deficiency, is consistent with observations indicating that this binding protein mediates the synthesis of RA in tissues requiring high levels of RA for their normal developmental programme. RAR-beta and CRABP II, which are both RA-inducible, were coexpressed with CRBP I in the choroid plexus and in many other sites, perhaps reflecting the fact that all three genes are RA-inducible. The function of CRABP II is not well understood; its domains of expression showed overlaps with both CRABP I and CRBP I.



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