The Family of Retinoic Acid Nuclear Receptors

2015 ◽  
pp. 10-27 ◽  
Author(s):  
P. Chambon ◽  
A. Zelent ◽  
M. Petkovich ◽  
C. Mendelsohn ◽  
P. Leroy ◽  
...  
Nature ◽  
1987 ◽  
Vol 330 (6147) ◽  
pp. 444-450 ◽  
Author(s):  
Martin Petkovich ◽  
Nigel J. Brand ◽  
Andrée Krust ◽  
Pierre Chambon

2004 ◽  
Vol 40 ◽  
pp. 157-167 ◽  
Author(s):  
Maria Nilsson ◽  
Karin Dahlman-Wright ◽  
Jan-Åke Gustafsson

For several decades, it has been known that oestrogens are essential for human health. The discovery that there are two oestrogen receptors (ERs), ERalpha and ERbeta, has facilitated our understanding of how the hormone exerts its physiological effects. The ERs belong to the family of ligand-activated nuclear receptors, which act by modulating the expression of target genes. Studies of ER-knockout (ERKO) mice have been instrumental in defining the relevance of a given receptor subtype in a certain tissue. Phenotypes displayed by ERKO mice suggest diseases in which dysfunctional ERs might be involved in aetiology and pathology. Association between single-nucleotide polymorphisms (SNPs) in ER genes and disease have been demonstrated in several cases. Selective ER modulators (SERMs), which are selective with regard to their effects in a certain cell type, already exist. Since oestrogen has effects in many tissues, the goal with a SERM is to provide beneficial effects in one target tissue while avoiding side effects in others. Refined SERMs will, in the future, provide improved therapeutic strategies for existing and novel indications.


2002 ◽  
Vol 362 (2) ◽  
pp. 265-271 ◽  
Author(s):  
Manickavasagam SUNDARAM ◽  
Daan M. F. van AALTEN ◽  
John B. C. FINDLAY ◽  
Asipu SIVAPRASADARAO

Members of the lipocalin superfamily share a common structural fold, but differ from each other with respect to the molecules with which they interact. They all contain eight β-strands (A—H) that fold to form a well-defined β-barrel, which harbours a binding pocket for hydrophobic ligands. These strands are connected by loops that vary in size and structure and make up the closed and open ends of the pocket. In addition to binding ligands, some members of the family interact with other macromolecules, the specificity of which is thought to be associated with the variable loop regions. Here, we have investigated whether the macromolecular-recognition properties can be transferred from one member of the family to another. For this, we chose the prototypical lipocalin, the plasma retinol-binding protein (RBP) and its close structural homologue the epididymal retinoic acid-binding protein (ERABP). RBP exhibits three molecular-recognition properties: it binds to retinol, to transthyretin (TTR) and to a cell-surface receptor. ERABP binds retinoic acid, but whether it interacts with other macromolecules is not known. Here, we show that ERABP does not bind to TTR and the RBP receptor, but when the loops of RBP near the open end of the pocket (L-1, L-2 and L-3, connecting β-strands A—B, C—D and E—F, respectively) were substituted into the corresponding regions of ERABP, the resulting chimaera acquired the ability to bind TTR and the receptor. L-2 and L-3 were found to be the major determinants of the receptor- and TTR-binding specificities respectively. Thus we demonstrate that lipocalins serve as excellent scaffolds for engineering novel biological functions.


2012 ◽  
Vol 351 (2) ◽  
pp. 306-316 ◽  
Author(s):  
Brenda J. Mengeling ◽  
Michael L. Goodson ◽  
William Bourguet ◽  
Martin L. Privalsky

Author(s):  
L.Ya. Fedorich

Objective — to study the modern classification, mechanisms of action and clinical effects of vitamin A derivatives, to analyze retinoid for local treatment of various dermatoses with a universal mechanism of action at the epidermis and dermis levels. Materials and methods. A review of the literature and an analysis of the results of international clinical trials of drugs based on the natural retinoid of the first generation — tretinoin (retinoic acid) is presented. The works of dozens of authors since 1980s to the present day are analyzed. Most sources provide detailed information on the results of topical retinoids in acne therapy, which are the base of clinical guidelines. Long-term (6 months or more) studies of retinoic acid-based preparations carried out in recent decades have discovered the unique clinical effects of tretinoin in the treatment of skin photoaging, actinic keratosis, etc. They are achieved due to the effect of tretinoid on the nuclear receptors of keratinocytes and fibroblasts. Results and discussion. The molecular mechanisms of action of retinoic acid, realizing the cellular and tissue effects of the most studied retinoid, are systematized and grouped in a single review. It has been proven that a unique feature of tretinin is its ability to activate directly all subtypes of RARs- and, indirectly, RARs-nuclear receptors of skin cells. A new modern drug for external use is presented — AltrenoТМ lotion containing micronized 0.05 % tretinoin in combination with sodium hyaluronate, soluble collagen and glycerin. This combination exhibits the expected clinical efficacy in acne therapy and prevents side effects such as dryness, redness and exfoliation. AltrenoТМ is approved for use in children of 9 years of age and older. Conclusions. Tretinoin (retinoic acid) is a modern powerful retinoid with a universal mechanism of action, recommended for the treatment of acne.


1993 ◽  
Vol 13 (4) ◽  
pp. 2235-2246
Author(s):  
R J Arceci ◽  
A A King ◽  
M C Simon ◽  
S H Orkin ◽  
D B Wilson

We report the cDNA cloning and characterization of mouse GATA-4, a new member of the family of zinc finger transcription factors that bind a core GATA motif. GATA-4 cDNA was identified by screening a 6.5-day mouse embryo library with oligonucleotide probes corresponding to a highly conserved region of the finger domains. Like other proteins of the family, GATA-4 is approximately 50 kDa in size and contains two zinc finger domains of the form C-X-N-C-(X17)-C-N-X-C. Cotransfection assays in heterologous cells demonstrate that GATA-4 trans activates reporter constructs containing GATA promoter elements. Northern (RNA) analysis and in situ hybridization show that GATA-4 mRNA is expressed in the heart, intestinal epithelium, primitive endoderm, and gonads. Retinoic acid-induced differentiation of mouse F9 cells into visceral or parietal endoderm is accompanied by increased expression of GATA-4 mRNA and protein. In vitro differentiation of embryonic stem cells into embryoid bodies is also associated with increased GATA-4 expression. We conclude that GATA-4 is a tissue-specific, retinoic acid-inducible, and developmentally regulated transcription factor. On the basis of its tissue distribution, we speculate that GATA-4 plays a role in gene expression in the heart, intestinal epithelium, primitive endoderm, and gonads.


2020 ◽  
Vol 21 (23) ◽  
pp. 8945
Author(s):  
Mercedes Fernández ◽  
Micaela Pannella ◽  
Vito Antonio Baldassarro ◽  
Alessandra Flagelli ◽  
Giuseppe Alastra ◽  
...  

While the role of thyroid hormones (THs) during fetal and postnatal life is well-established, their role at preimplantation and during blastocyst development remains unclear. In this study, we used an embryonic stem cell line isolated from rat (RESC) to study the effects of THs and retinoic acid (RA) on early embryonic development during the pre-implantation stage. The results showed that THs play an important role in the differentiation/maturation processes of cells obtained from embryoid bodies (EB), with thyroid hormone nuclear receptors (TR) (TRα and TRβ), metabolic enzymes (deiodinases 1, 2, 3) and membrane transporters (Monocarboxylate transporters -MCT- 8 and 10) being expressed throughout in vitro differentiation until the Embryoid body (EB) stage. Moreover, thyroid hormone receptor antagonist TR (1-850) impaired RA-induced neuroectodermal lineage specification. This effect was significantly higher when cells were treated with retinoic acid (RA) to induce neuroectodermal lineage, studied through the gene and protein expression of nestin, an undifferentiated progenitor marker from the neuroectoderm lineage, as established by nestin mRNA and protein regulation. These results demonstrate the contribution of the two nuclear receptors, TR and RA, to the process of neuroectoderm maturation of the in vitro model embryonic stem cells obtained from rat.


1998 ◽  
Vol 18 (9) ◽  
pp. 1595-1604 ◽  
Author(s):  
Stéphane Bonilla ◽  
Catherine Noël-Suberville ◽  
Maria Puy-Portillo ◽  
Edurne Simon ◽  
Antonio Del Barrio ◽  
...  

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