Receptor 5-HT2A

5HT-2A é um tipo de receptor que pertence à família de receptores de serotonina e é um membro da família de receptores acoplados às proteínas G (GPCR). 5HT2A está envolvido na contração do músculo liso traqueal, broncoconstrição e no controle da produção de aldosterona entre outras funções fisiológicas. O receptor também é necessário para a propagação do vírus do polioma humano chamado vírus JC. 5HT2A é amplamente expresso em todo o sistema nervoso central (SNC) e em várias partes do corpo de Mamíferos. É expressa perto da maioria das áreas ricas em serotonina, incluindo Neocórtex e tubérculo olfatório. O aumento da estimulação dos receptores 5HT2A parece opor-se às ações terapêuticas de aumento da estimulação de outros receptores de serotonina em tratamentos antidepressivos e ansiolíticos.^[1]

Antagonistas

Nefazodona (não seletivo) antidepressivo
Mirtazapina (não seletivo) antidepressivo
Ritanserina (não seletivo) produto para pesquisa
Olanzapina (não seletivo) antipsicótico
Risperidona (seletivo em baixa dose) antipsicótico
Pimavanserina (seletivo) antiparkinsoniano/antipsicótico
Existem muitos outros, como, amitriptilina, trazodona, maprotilina; etc. (todos não seletivos).^[2]

Referências

↑ «5HT2A Receptor Antibody, pAb, Rabbit- GenScript, AAALAC International Accredited Animal Facility». www.genscript.com. Consultado em 25 de novembro de 2016
↑ «Sobre todos os remédios no autismo». Universo Autista. 23 de agosto de 2015

Receptores transmembrana: Receptores acoplados às proteínas G

Classe A: Tipo rodopsina

Neurotransmissor

Adrenérgico	α1 (A, B, D) · α2 (A, B, C) · β1 · β2 · β3
Purinérgico	Adenosina (A1, A2A, A2B, A3) · P2Y (1, 2, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14)
Serotonina	(todos, exceto 5-HT3) 5-HT1 (A, B, D, E, F) · 5-HT2 (A, B, C) · 5-HT (4, 5A, 6, 7)
Outros	Acetilcolina (M1, M2, M3, M4, M5) · Dopamina (D1, D2, D3, D4, D5) · Histamina (H1, H2, H3, H4) · Melatonina (1A, 1B, 1C) · TAAR (1, 2, 3, 5, 6, 8, 9)

Metabólitos e
moléculas de sinalização

Eicosanoide	CysLT (1, 2) · LTB4 (1, 2) · FPRL (1, 2, 3) · OXE · Prostaglandina (DP (1, 2), EP (1, 2, 3, 4), FP) · Prostaciclina · Tromboxano
Outros	Ácido biliar · Ácido graxo livre (1, 2, 3, 4) · Ácido hidroxicarboxilíco (1, 2, 3) · Ácido lisofosfatídico (1, 2, 3, 4, 5, 6) · Canabinoide (CB1, CB2, GPR (18, 55, 119)) · EBI2 · Estrogênio · Lisofosfolipídeo (1, 2, 3) · Oxoglutarato · PAF · Esfingosina-1-fosfato (1, 2, 3, 4, 5) · Succinato

Peptídeos

Neuropeptídeo

B/W (1, 2) · FF (1, 2) · S · Y (1, 2, 4, 5) · Neuromedin (B, U (1, 2)) · Neurotensina (1, 2)

Outros

Anafilatoxina (C3a, C5a) · Angiotensina (1, 2) · Apelina · Bombesina (BRS3, GRPR, NMBR) · Bradicinina (B1, B2) · Quimiocina · Colecistoquinina (A, B) · Endotelina (A, B) · Formil peptídeo (1, 2, 3) · FSH · Galanina (1, 2, 3) · Receptor GHB · Hormônio liberador de gonadotrofina (1, 2) · Ghrelina · Kisspeptina · Hormônio luteinizante/coriogonadotropina · MAS (1, 1L, D, E, F, G, X1, X2, X3, X4) · Melanocortina (1, 2, 3, 4, 5) · MCHR (1, 2) · Motilina · Opioide (δ, κ, μ, Nociceptina & ζ, mas não σ) · Orexina (1, 2) · Oxitocina · Procineticina (1, 2) · Peptídeo liberador de prolactina · Relaxina (1, 2, 3, 4) · Somatostatina (1, 2, 3, 4, 5) · Taquicinina (1, 2, 3) · Tirotrofina · Hormônio liberador de tirotropina · Urotensina-II · Vasopressina (1A, 1B, 2)

Miscelânea

Órfão	GPR (1, 3, 4, 6, 12, 15, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 31, 32, 33, 34, 35, 37, 39, 42, 44, 45, 50, 52, 55, 61, 62, 63, 65, 68, 75, 77, 78, 81, 82, 83, 84, 85, 87, 88, 92, 101, 103, 109A, 109B, 119, 120, 132, 135, 137B, 139, 141, 142, 146, 148, 149, 150, 151, 152, 153, 160, 161, 162, 171, 173, 174, 176, 177, 182, 183)
Outros	Olfatório · Opsina (3, 4, 5, 1LW, 1MW, 1SW, RGR, RRH) · Ativado por protease (1, 2, 3, 4) · SREB (1, 2, 3)

Classe B: Tipo secretina

Órfãos

GPR (56, 64, 97, 98, 110, 111, 112, 113, 114, 115, 116, 123, 124, 125, 126, 128, 133, 143, 144, 155, 157)

Outros

ADCYAP1R1 · Caderina (1, 2, 3) · Calcitonina · CALCRL · CD97 · EMR (1, 2, 3) · Glucagon (GR, GIPR, GLP1R, GLP2R) · Hormônio liberador de corticotrofina (1, 2) · Hormônio liberador do hormônio do crescimento · Hormônio paratireoide (1, 2) · GPR · Inibidor de angiogênese específico do cérebro (1, 2, 3) · Latrofilina (1, 2, 3, ELTD1 · Peptídeo intestinal vasoativo (1, 2) · Proteínas tipo-Matusalém · Secretina

Classe C: Metabotrópico
glutamato / feromona

Sabor	TAS1R (1, 2, 3) · TAS2R (1, 3, 4, 5, 8, 9, 10, 12, 13, 14, 16, 19, 20, 30, 31, 38, 39, 40, 41, 42, 43, 45, 46, 50)
Outros	Sensor de cálcio · GABA B (1, 2) · Glutamato (Metabotrópico de glutamato (1, 2, 3, 4, 5, 6, 7, 8)) · GPRC6A · GPR (156, 158, 179) · RAIG (1, 2, 3, 4)

Class F:
Frizzled / Smoothened

Frizzled	Frizzled (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
Smoothened	Smoothened

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