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Glukokortikoidni receptor — разлика између измена

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== Agonisti i antagonisti ==
== Agonisti i antagonisti ==
[[Deksametazon]] je agonist, a [[RU486]] i [[ciproteron]] su antagonisti GR. Isto tako, [[progesteron]] i [[DHEA]] deluju kao antagonisti na GR.
[[Deksametazon]] je agonist, a [[RU486]] i [[ciproteron]] su antagonisti GR. Isto tako, [[progesteron]] i [[DHEA]] deluju kao antagonisti na GR.

==Interactions==
Glukokortikoidni receptor može da formira [[Protein-protein interakcija|interakcije]] sa:
{{Columns-list|5|
* -{[[BAG1]]}-,<ref name="pmid9603979">{{cite journal | author = Kullmann M, Schneikert J, Moll J, Heck S, Zeiner M, Gehring U, Cato AC | title = RAP46 is a negative regulator of glucocorticoid receptor action and hormone-induced apoptosis | journal = J. Biol. Chem. | volume = 273 | issue = 23 | pages = 14620–5 | year = 1998 | month = June | pmid = 9603979 | doi = 10.1074/jbc.273.23.14620 | url = | issn = }}</ref><ref name="pmid11101523">{{cite journal | author = Schneikert J, Hübner S, Langer G, Petri T, Jäättelä M, Reed J, Cato AC | title = Hsp70-RAP46 interaction in downregulation of DNA binding by glucocorticoid receptor | journal = EMBO J. | volume = 19 | issue = 23 | pages = 6508–16 | year = 2000 | month = December | pmid = 11101523 | pmc = 305849 | doi = 10.1093/emboj/19.23.6508 | url = | issn = }}</ref>
* -{[[CEBPB]]}-,<ref name="pmid9817600">{{cite journal | author = Boruk M, Savory JG, Haché RJ | title = AF-2-dependent potentiation of CCAAT enhancer binding protein beta-mediated transcriptional activation by glucocorticoid receptor | journal = Mol. Endocrinol. | volume = 12 | issue = 11 | pages = 1749–63 | year = 1998 | month = November | pmid = 9817600 | doi = 10.1210/me.12.11.1749 | url = | issn = }}</ref>
* [[CREB vezujući protein|-{CREBBP}-]],<ref name="pmid9649342">{{cite journal | author = Almlöf T, Wallberg AE, Gustafsson JA, Wright AP | title = Role of important hydrophobic amino acids in the interaction between the glucocorticoid receptor tau 1-core activation domain and target factors | journal = Biochemistry | volume = 37 | issue = 26 | pages = 9586–94 | year = 1998 | month = June | pmid = 9649342 | doi = 10.1021/bi973029x | url = | issn = }}</ref>
* -{[[DAP3]]}-,<ref name="pmid10903152">{{cite journal | author = Hulkko SM, Wakui H, Zilliacus J | title = The pro-apoptotic protein death-associated protein 3 (DAP3) interacts with the glucocorticoid receptor and affects the receptor function | journal = Biochem. J. | volume = Pt 3 | issue = | pages = 885–93 | year = 2000 | series = 349 | month = August | pmid = 10903152 | pmc = 1221218 | doi = | url = | issn = }}</ref>
* [[Protein vezan za smrt 6|-{DAXX}-]],<ref name="pmid12595526">{{cite journal | author = Lin DY, Lai MZ, Ann DK, Shih HM | title = Promyelocytic leukemia protein (PML) functions as a glucocorticoid receptor co-activator by sequestering Daxx to the PML oncogenic domains (PODs) to enhance its transactivation potential | journal = J. Biol. Chem. | volume = 278 | issue = 18 | pages = 15958–65 | year = 2003 | month = May | pmid = 12595526 | doi = 10.1074/jbc.M300387200 | url = | issn = }}</ref>
* [[Protein toplotnog šoka 90 kDa alfa (citosolni), član A1|-{HSP90AA1}-]],<ref name=pmid10903152/><ref name="pmid10066374">{{cite journal | author = Jibard N, Meng X, Leclerc P, Rajkowski K, Fortin D, Schweizer-Groyer G, Catelli MG, Baulieu EE, Cadepond F | title = Delimitation of two regions in the 90-kDa heat shock protein (Hsp90) able to interact with the glucocorticosteroid receptor (GR) | journal = Exp. Cell Res. | volume = 247 | issue = 2 | pages = 461–74 | year = 1999 | month = March | pmid = 10066374 | doi = 10.1006/excr.1998.4375 | url = | issn = }}</ref><ref name="pmid12093808">{{cite journal | author = Kanelakis KC, Shewach DS, Pratt WB | title = Nucleotide binding states of hsp70 and hsp90 during sequential steps in the process of glucocorticoid receptor.hsp90 heterocomplex assembly | journal = J. Biol. Chem. | volume = 277 | issue = 37 | pages = 33698–703 | year = 2002 | month = September | pmid = 12093808 | doi = 10.1074/jbc.M204164200 | url = | issn = }}</ref><ref name="pmid9334248">{{cite journal | author = Hecht K, Carlstedt-Duke J, Stierna P, Gustafsson J, Brönnegârd M, Wikström AC | title = Evidence that the beta-isoform of the human glucocorticoid receptor does not act as a physiologically significant repressor | journal = J. Biol. Chem. | volume = 272 | issue = 42 | pages = 26659–64 | year = 1997 | month = October | pmid = 9334248 | doi = 10.1074/jbc.272.42.26659 | url = | issn = }}</ref><ref name="pmid8898375">{{cite journal | author = de Castro M, Elliot S, Kino T, Bamberger C, Karl M, Webster E, Chrousos GP | title = The non-ligand binding beta-isoform of the human glucocorticoid receptor (hGR beta): tissue levels, mechanism of action, and potential physiologic role | journal = Mol. Med. | volume = 2 | issue = 5 | pages = 597–607 | year = 1996 | month = September | pmid = 8898375 | pmc = 2230188 | doi = | url = | issn = }}</ref><ref name="pmid8645634">{{cite journal | author = van den Berg JD, Smets LA, van Rooij H | title = Agonist-free transformation of the glucocorticoid receptor in human B-lymphoma cells | journal = J. Steroid Biochem. Mol. Biol. | volume = 57 | issue = 3-4 | pages = 239–49 | year = 1996 | month = February | pmid = 8645634 | doi = 10.1016/0960-0760(95)00271-5 | url = | issn = }}</ref><ref name="pmid8621522">{{cite journal | author = Stancato LF, Silverstein AM, Gitler C, Groner B, Pratt WB | title = Use of the thiol-specific derivatizing agent N-iodoacetyl-3-[125I]iodotyrosine to demonstrate conformational differences between the unbound and hsp90-bound glucocorticoid receptor hormone binding domain | journal = J. Biol. Chem. | volume = 271 | issue = 15 | pages = 8831–6 | year = 1996 | month = April | pmid = 8621522 | doi = 10.1074/jbc.271.15.8831 | url = | issn = }}</ref>
* -{[[HNRPU]]}-,<ref name="pmid9353307">{{cite journal | author = Eggert M, Michel J, Schneider S, Bornfleth H, Baniahmad A, Fackelmayer FO, Schmidt S, Renkawitz R | title = The glucocorticoid receptor is associated with the RNA-binding nuclear matrix protein hnRNP U | journal = J. Biol. Chem. | volume = 272 | issue = 45 | pages = 28471–8 | year = 1997 | month = November | pmid = 9353307 | doi = 10.1074/jbc.272.45.28471 | url = | issn = }}</ref>
* -{[[MED1]]}-,<ref name=pmid11266503/><ref name=pmid10508170/>
* -{[[MED14]]}-,<ref name="pmid10508170">{{cite journal | author = Hittelman AB, Burakov D, Iñiguez-Lluhí JA, Freedman LP, Garabedian MJ | title = Differential regulation of glucocorticoid receptor transcriptional activation via AF-1-associated proteins | journal = EMBO J. | volume = 18 | issue = 19 | pages = 5380–8 | year = 1999 | month = October | pmid = 10508170 | pmc = 1171607 | doi = 10.1093/emboj/18.19.5380 | url = | issn = }}</ref>
* [[Mineralokortikoidni receptor]],<ref name="pmid11154266">{{cite journal | author = Savory JG, Préfontaine GG, Lamprecht C, Liao M, Walther RF, Lefebvre YA, Haché RJ | title = Glucocorticoid receptor homodimers and glucocorticoid-mineralocorticoid receptor heterodimers form in the cytoplasm through alternative dimerization interfaces | journal = Mol. Cell. Biol. | volume = 21 | issue = 3 | pages = 781–93 | year = 2001 | month = February | pmid = 11154266 | pmc = 86670 | doi = 10.1128/MCB.21.3.781-793.2001 | url = | issn = }}</ref>
* -{[[NRIP1]]}-,<ref name=pmid11266503/><ref name="pmid12773562">{{cite journal | author = Tazawa H, Osman W, Shoji Y, Treuter E, Gustafsson JA, Zilliacus J | title = Regulation of subnuclear localization is associated with a mechanism for nuclear receptor corepression by RIP140 | journal = Mol. Cell. Biol. | volume = 23 | issue = 12 | pages = 4187–98 | year = 2003 | month = June | pmid = 12773562 | pmc = 156128 | doi = 10.1128/MCB.23.12.4187-4198.2003 | url = | issn = }}</ref><ref name="pmid10364267">{{cite journal | author = Subramaniam N, Treuter E, Okret S | title = Receptor interacting protein RIP140 inhibits both positive and negative gene regulation by glucocorticoids | journal = J. Biol. Chem. | volume = 274 | issue = 25 | pages = 18121–7 | year = 1999 | month = June | pmid = 10364267 | doi = 10.1074/jbc.274.25.18121 | url = | issn = }}</ref>
* [[Korepresor nuklearnog receptora 1|-{NCOR1}-]],<ref name="pmid12569182">{{cite journal | author = Stevens A, Garside H, Berry A, Waters C, White A, Ray D | title = Dissociation of steroid receptor coactivator 1 and nuclear receptor corepressor recruitment to the human glucocorticoid receptor by modification of the ligand-receptor interface: the role of tyrosine 735 | journal = Mol. Endocrinol. | volume = 17 | issue = 5 | pages = 845–59 | year = 2003 | month = May | pmid = 12569182 | doi = 10.1210/me.2002-0320 | url = | issn = }}</ref><ref name="pmid12011091">{{cite journal | author = Schulz M, Eggert M, Baniahmad A, Dostert A, Heinzel T, Renkawitz R | title = RU486-induced glucocorticoid receptor agonism is controlled by the receptor N terminus and by corepressor binding | journal = J. Biol. Chem. | volume = 277 | issue = 29 | pages = 26238–43 | year = 2002 | month = July | pmid = 12011091 | doi = 10.1074/jbc.M203268200 | url = | issn = }}</ref>
* [[Koaktivator nuklearnog receptora 1|-{NCOA1}-]],<ref name=pmid11266503/><ref name="pmid12118039">{{cite journal | author = Kucera T, Waltner-Law M, Scott DK, Prasad R, Granner DK | title = A point mutation of the AF2 transactivation domain of the glucocorticoid receptor disrupts its interaction with steroid receptor coactivator 1 | journal = J. Biol. Chem. | volume = 277 | issue = 29 | pages = 26098–102 | year = 2002 | month = July | pmid = 12118039 | doi = 10.1074/jbc.M204013200 | url = | issn = }}</ref>
* [[Koaktivator nuklearnog receptora 2|-{NCOA2}-]],<ref name="pmid11266503">{{cite journal | author = Zilliacus J, Holter E, Wakui H, Tazawa H, Treuter E, Gustafsson JA | title = Regulation of glucocorticoid receptor activity by 14--3-3-dependent intracellular relocalization of the corepressor RIP140 | journal = Mol. Endocrinol. | volume = 15 | issue = 4 | pages = 501–11 | year = 2001 | month = April | pmid = 11266503 | doi = 10.1210/me.15.4.501 | url = | issn = }}</ref><ref name="pmid12151000">{{cite journal | author = Bledsoe RK, Montana VG, Stanley TB, Delves CJ, Apolito CJ, McKee DD, Consler TG, Parks DJ, Stewart EL, Willson TM, Lambert MH, Moore JT, Pearce KH, Xu HE | title = Crystal structure of the glucocorticoid receptor ligand binding domain reveals a novel mode of receptor dimerization and coactivator recognition | journal = Cell | volume = 110 | issue = 1 | pages = 93–105 | year = 2002 | month = July | pmid = 12151000 | doi = 10.1016/S0092-8674(02)00817-6 | url = | issn = }}</ref>
* [[Koaktivator nuklearnog receptora 3|-{NCOA3}-]],<ref name=pmid11266503/><ref name="pmid12917342">{{cite journal | author = Hsiao PW, Fryer CJ, Trotter KW, Wang W, Archer TK | title = BAF60a mediates critical interactions between nuclear receptors and the BRG1 chromatin-remodeling complex for transactivation | journal = Mol. Cell. Biol. | volume = 23 | issue = 17 | pages = 6210–20 | year = 2003 | month = September | pmid = 12917342 | pmc = 180928 | doi = 10.1128/MCB.23.17.6210-6220.2003 | url = | issn = }}</ref>
* -{[[POU2F1]]}-,<ref name=pmid10480874>{{cite journal |doi=10.1074/jbc.274.38.26713 |last=Préfontaine |first=G G |authorlink= |coauthors=Walther R, Giffin W, Lemieux M E, Pope L, Haché R J |year=1999|month=Sep. |title=Selective binding of steroid hormone receptors to octamer transcription factors determines transcriptional synergism at the mouse mammary tumor virus promoter |journal=J. Biol. Chem. |volume=274 |issue=38 |pages=26713–9 |publisher= |location = UNITED STATES| issn = 0021-9258| pmid = 10480874 | bibcode = | oclc =| id = | url = | language = | format = | accessdate = | laysummary = | laysource = | laydate = | quote = }}</ref><ref name="pmid10480874">{{cite journal | author = Préfontaine GG, Walther R, Giffin W, Lemieux ME, Pope L, Haché RJ | title = Selective binding of steroid hormone receptors to octamer transcription factors determines transcriptional synergism at the mouse mammary tumor virus promoter | journal = J. Biol. Chem. | volume = 274 | issue = 38 | pages = 26713–9 | year = 1999 | month = September | pmid = 10480874 | doi = 10.1074/jbc.274.38.26713| url = | issn = }}</ref><ref name="pmid9584182">{{cite journal | author = Préfontaine GG, Lemieux ME, Giffin W, Schild-Poulter C, Pope L, LaCasse E, Walker P, Haché RJ | title = Recruitment of octamer transcription factors to DNA by glucocorticoid receptor | journal = Mol. Cell. Biol. | volume = 18 | issue = 6 | pages = 3416–30 | year = 1998 | month = June | pmid = 9584182 | pmc = 108923 | doi = | url = | issn = }}</ref>
* -{[[RANBP9]]}-,<ref name=pmid12361945>{{cite journal |last=Rao |first=Mira A |authorlink= |coauthors=Cheng Helen, Quayle Alandra N, Nishitani Hideo, Nelson Colleen C, Rennie Paul S |year=2002|month=Dec. |title=RanBPM, a nuclear protein that interacts with and regulates transcriptional activity of androgen receptor and glucocorticoid receptor |journal=J. Biol. Chem. |volume=277 |issue=50 |pages=48020–7 |publisher= |location = United States| issn = 0021-9258| pmid = 12361945 |doi = 10.1074/jbc.M209741200 | bibcode = | oclc =| id = | url = | language = | format = | accessdate = | laysummary = | laysource = | laydate = | quote = }}</ref>
* -{[[RELA]]}-,<ref name="pmid12361945">{{cite journal | author = Rao MA, Cheng H, Quayle AN, Nishitani H, Nelson CC, Rennie PS | title = RanBPM, a nuclear protein that interacts with and regulates transcriptional activity of androgen receptor and glucocorticoid receptor | journal = J. Biol. Chem. | volume = 277 | issue = 50 | pages = 48020–7 | year = 2002 | month = December | pmid = 12361945 | doi = 10.1074/jbc.M209741200 | url = | issn = }}</ref><ref name="pmid10995388">{{cite journal | author = Nissen RM, Yamamoto KR | title = The glucocorticoid receptor inhibits NFkappaB by interfering with serine-2 phosphorylation of the RNA polymerase II carboxy-terminal domain | journal = Genes Dev. | volume = 14 | issue = 18 | pages = 2314–29 | year = 2000 | month = September | pmid = 10995388 | pmc = 316928 | doi = 10.1101/gad.827900 | url = | issn = }}</ref><ref name="pmid7659084">{{cite journal | author = Caldenhoven E, Liden J, Wissink S, Van de Stolpe A, Raaijmakers J, Koenderman L, Okret S, Gustafsson JA, Van der Saag PT | title = Negative cross-talk between RelA and the glucocorticoid receptor: a possible mechanism for the antiinflammatory action of glucocorticoids | journal = Mol. Endocrinol. | volume = 9 | issue = 4 | pages = 401–12 | year = 1995 | month = April | pmid = 7659084 | doi = 10.1210/me.9.4.401 | url = | issn = }}</ref>
* -{[[SMAD3]]}-,<ref name="pmid12902338">{{cite journal | author = Li G, Wang S, Gelehrter TD | title = Identification of glucocorticoid receptor domains involved in transrepression of transforming growth factor-beta action | journal = J. Biol. Chem. | volume = 278 | issue = 43 | pages = 41779–88 | year = 2003 | month = October | pmid = 12902338 | doi = 10.1074/jbc.M305350200 | url = | issn = }}</ref><ref name="pmid10518526">{{cite journal | author = Song CZ, Tian X, Gelehrter TD | title = Glucocorticoid receptor inhibits transforming growth factor-beta signaling by directly targeting the transcriptional activation function of Smad3 | journal = Proc. Natl. Acad. Sci. U.S.A. | volume = 96 | issue = 21 | pages = 11776–81 | year = 1999 | month = October | pmid = 10518526 | pmc = 18362 | doi = 10.1073/pnas.96.21.11776 | url = | issn = }}</ref>
* -{[[SMARCD1]]}-,<ref name=pmid12917342/>
* -{[[SMARCA4]]}-<ref name=pmid12917342/><ref name="pmid10688647">{{cite journal | author = Wallberg AE, Neely KE, Hassan AH, Gustafsson JA, Workman JL, Wright AP | title = Recruitment of the SWI-SNF chromatin remodeling complex as a mechanism of gene activation by the glucocorticoid receptor tau1 activation domain | journal = Mol. Cell. Biol. | volume = 20 | issue = 6 | pages = 2004–13 | year = 2000 | month = March | pmid = 10688647 | pmc = 110817 | doi = 10.1128/MCB.20.6.2004-2013.2000 | url = | issn = }}</ref>
* -{[[STAT3]]}-,<ref name="pmid14522952">{{cite journal | author = Lerner L, Henriksen MA, Zhang X, Darnell JE | title = STAT3-dependent enhanceosome assembly and disassembly: synergy with GR for full transcriptional increase of the alpha 2-macroglobulin gene | journal = Genes Dev. | volume = 17 | issue = 20 | pages = 2564–77 | year = 2003 | month = October | pmid = 14522952 | pmc = 218150 | doi = 10.1101/gad.1135003 | url = | issn = }}</ref><ref name="pmid9388192">{{cite journal | author = Zhang Z, Jones S, Hagood JS, Fuentes NL, Fuller GM | title = STAT3 acts as a co-activator of glucocorticoid receptor signaling | journal = J. Biol. Chem. | volume = 272 | issue = 49 | pages = 30607–10 | year = 1997 | month = December | pmid = 9388192 | doi = 10.1074/jbc.272.49.30607 | url = | issn = }}</ref>
* -{[[STAT5B]]}-,<ref name="pmid8878484">{{cite journal | author = Stöcklin E, Wissler M, Gouilleux F, Groner B | title = Functional interactions between Stat5 and the glucocorticoid receptor | journal = Nature | volume = 383 | issue = 6602 | pages = 726–8 | year = 1996 | month = October | pmid = 8878484 | doi = 10.1038/383726a0 | url = | issn = }}</ref>
* [[Tioredoksin]],<ref name="pmid9915858">{{cite journal | author = Makino Y, Yoshikawa N, Okamoto K, Hirota K, Yodoi J, Makino I, Tanaka H | title = Direct association with thioredoxin allows redox regulation of glucocorticoid receptor function | journal = J. Biol. Chem. | volume = 274 | issue = 5 | pages = 3182–8 | year = 1999 | month = January | pmid = 9915858 | doi = 10.1074/jbc.274.5.3182 | url = | issn = }}</ref>
* -{[[TRIM28]]}-,<ref name="pmid9742105">{{cite journal | author = Chang CJ, Chen YL, Lee SC | title = Coactivator TIF1beta interacts with transcription factor C/EBPbeta and glucocorticoid receptor to induce alpha1-acid glycoprotein gene expression | journal = Mol. Cell. Biol. | volume = 18 | issue = 10 | pages = 5880–7 | year = 1998 | month = October | pmid = 9742105 | pmc = 109174 | doi = | url = | issn = }}</ref> and
* -{[[YWHAH]]}-.<ref name="pmid9079630">{{cite journal | author = Wakui H, Wright AP, Gustafsson J, Zilliacus J | title = Interaction of the ligand-activated glucocorticoid receptor with the 14-3-3 eta protein | journal = J. Biol. Chem. | volume = 272 | issue = 13 | pages = 8153–6 | year = 1997 | month = March | pmid = 9079630 | doi = 10.1074/jbc.272.13.8153 | url = | issn = }}</ref>
}}


== Reference ==
== Reference ==

Верзија на датум 7. новембар 2013. у 20:47

Nuklearni receptor potfamilije 3, grupa C, član 1 (glukokortikoidni receptor)
Kristalografska struktura DNK vezujućeg domena glukokortikoidnog receptora (DBD, levo, 1R4O​ vezan za DNK) i ligand vezujući domen [LBD, desno, 1M2Z​ vezan za deksametazon (beli štapići) i TIF2 koaktivatorski protein (crveno)]. Isprekidane žute linije predstavljaju interakcije vodoničnog vezivanja između receptora i liganda. 2D struktura deksametazona je takođe prikazana u dole desno.
Dostupne strukture
1M2Z​, 1NHZ​, 1P93​, 3BQD​, 3CLD​, 3E7C​, 3H52​, 3K22​, 3K23​, 4HN5​, 4HN6
Identifikatori
Simboli NR3C1; GCCR; GCR; GR; GRL
Vanjski ID OMIM138040 MGI95824 HomoloGene30960 IUPHAR: GeneCards: NR3C1 Gene
Pregled RNK izražavanja
podaci
Ortolozi
Vrsta Čovek Miš
Entrez 2908 14815
Ensembl ENSG00000113580 ENSMUSG00000024431
UniProt P04150 E9PUR6
RefSeq (mRNA) NM_000176 NM_008173
RefSeq (protein) NP_000167 NP_032199
Lokacija (UCSC) Chr 5:
142.66 - 142.82 Mb
Chr 18:
39.41 - 39.49 Mb
PubMed pretraga [1] [2]

Glukokortikoidni receptor (GR, GCR, NR3C1, nuklearni receptor potfamilija 3, grupa C, član 1) receptor je za koji se vezuju kortizol i drugi glukokortikoidi.

GR je izražen u skoro svim ćelijma a telu i reguliše gene koji kontrolišu razviće, metabolizam, i imunski respons. Gen ovog receptora se izražava u nekoliko formi, te stoga GR ima mnoštvo različitih (pleiotropskih) dejstava u različitim delovima tela.

Kad se za GR vežu glukokortikoidi, njegov primarni mehanizam dejstva je regulacija trakripcija gena.[1][2] Nevezani receptor se nalazi u ćelijskom citosolu. Nakon vezivanja glukokortikoida za receptor, receptor-glukortikoidni kompleks može da povisi izražavanje antiinflamatornih proteina u jedru ili da suzbije izražavanje proinflamatornih proteina u citozolu (putem sprečavanja translokacije drugih transkripcionih faktora iz citozola u jedro).

Kod ljudi, GR protein je kodiran NR3C1 genom koji je lociran na hromozomu 5 (5q31).[3][4]

Strukture

Poput drugih steroidnih receptora,[5] glukokortikoidni receptor ima modularu strukturu[6] i sadrži sledeće domene (obležene sa A - F):

Vezivanje liganda i respons

U odsustvu hormona, glukokortikoidni receptor (GR) se nalazi u citosolu u kompleksu sa raznim proteinima uključujući protein toplotnog šoka 90 (hsp90), protein toplotnog šoka 70 (hsp70) i protein FKBP52 (FK506 vezujući protein 52).[7] Endogeni glukokortikoidni hormon kortizol difuzijom prolazi kroz ćelijsku membranu u citoplazmu i vezuje se za glukokortikoidni receptor (GR), što dovodi do oslobađanja proteina toplotnog šoka. Rezultirajuća aktivirana forma GR ima dva moguća mehanizma dejstva, transaktivacija i transrepresija.[8][9]

Transaktivacija

Direktni mehanizam dejstva obuhvata homodimerizaciju receptora, translokaciju putem aktivnog transporta u jedro, i vezivanje za specifiće DNK responsivne elemente, čime se aktivira transkripcija gena. Ovaj mehanizam dejstva se naziva transaktivacija. Biološki respons zavisi od tipa ćelije.

Transrepresija

U odsustvu aktiviranog GR, drugi transkripcini faktori kao što je NF-κB ili AP-1 mogu da transaktiviraju ciljne gene.[10] Aktivirani GR može da formira kompleks as tim drugim transkripcionim faktorima i da spreči njihovo vezivanje za ciljne gene i time suzbije izražavanje gena koje normalno kontrolišu NF-κB ili AP-1. Ovaj indirektni mehanizam dejstva se naziva transrepresija.

Klinički značaj

GR je abnormalan u sučajevima familialne glukokortikoidne otpornosti.[11]

U strukturama centralnog nervnog sistema, glukokortikoidni receptor učestvuje u neuroendokrinoj integraciji. On funkcioniše kao glavna komponenta endokrinog uticaja na mozak, posebno u responsu na stres. Ovaj receptor je impliciran u kratkotrajnu i dugotrajnu adaptaciju u responsu na stresore, i važan je za razumevanje psiholoških poremećaja, uključujući pojedine tipove depresije.[12][13]

Agonisti i antagonisti

Deksametazon je agonist, a RU486 i ciproteron su antagonisti GR. Isto tako, progesteron i DHEA deluju kao antagonisti na GR.

Interactions

Glukokortikoidni receptor može da formira interakcije sa:

Reference

  1. ^ Lu NZ, Wardell SE, Burnstein KL, Defranco D, Fuller PJ, Giguere V, Hochberg RB, McKay L, Renoir JM, Weigel NL, Wilson EM, McDonnell DP, Cidlowski JA (2006). „International Union of Pharmacology. LXV. The pharmacology and classification of the nuclear receptor superfamily: glucocorticoid, mineralocorticoid, progesterone, and androgen receptors”. Pharmacol Revl. 58 (4): 782—97. PMID 17132855. doi:10.1124/pr.58.4.9.  [Free full text]
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