Membrane androgen receptor

Membrane androgen receptors (mARs) are a group of G protein-coupled receptors (GPCRs) which bind and are activated by testosterone and/or other androgens.^[1]^[2]^[3] Unlike the androgen receptor (AR), a nuclear receptor which mediates its effects via genomic mechanisms, mARs are cell surface receptors which rapidly alter cell signaling via modulation of intracellular signaling cascades.^[2]^[3] Known or proposed mARs include GPRC6A and ZIP9.^[2]^[4]

GPRC6A has been found to be involved in testicular function and prostate cancer.^[2]^[3] mARs have also been found to be expressed in breast cancer cells.^[5] Activation of mARs by testosterone has been found to increase skeletal muscle strength, indicating potential anabolic effects.^[6] mARs have also been implicated in the antigonadotropic effects of androgens.^[7] 3α-Androstanediol, an active metabolite of dihydrotestosterone (DHT) and a weak androgen as well as a neurosteroid via acting as a positive allosteric modulator of the GABA_A receptor, rapidly influences sexual receptivity and behavior in animals, an effect that is GABA_A receptor-dependent.^[7]

References

↑ Bennett NC, Gardiner RA, Hooper JD, Johnson DW, Gobe GC (2010). "Molecular cell biology of androgen receptor signalling". Int. J. Biochem. Cell Biol. 42 (6): 813–27. doi:10.1016/j.biocel.2009.11.013. PMID 19931639.
1 2 3 4 Wang C, Liu Y, Cao JM (2014). "G protein-coupled receptors: extranuclear mediators for the non-genomic actions of steroids". Int J Mol Sci 15 (9): 15412–25. doi:10.3390/ijms150915412. PMC 4200746. PMID 25257522.
1 2 3 Lang F, Alevizopoulos K, Stournaras C (2013). "Targeting membrane androgen receptors in tumors". Expert Opin. Ther. Targets 17 (8): 951–63. doi:10.1517/14728222.2013.806491. PMID 23746222.
↑ Pi M, Quarles LD (June 2011). "GPRC6A regulates prostate cancer progression". Prostate 72 (4): 399–409. doi:10.1002/pros.21442. PMID 21681779.
↑ Papadopoulou N, Papakonstanti EA, Kallergi G, Alevizopoulos K, Stournaras C (2009). "Membrane androgen receptor activation in prostate and breast tumor cells: molecular signaling and clinical impact". IUBMB Life 61 (1): 56–61. doi:10.1002/iub.150. PMID 19109827.
↑ Dent JR, Fletcher DK, McGuigan MR (2012). "Evidence for a Non-Genomic Action of Testosterone in Skeletal Muscle Which may Improve Athletic Performance: Implications for the Female Athlete". J Sports Sci Med 11 (3): 363–70. PMC 3737931. PMID 24149341.
1 2 Foradori CD, Weiser MJ, Handa RJ (2008). "Non-genomic actions of androgens". Front Neuroendocrinol 29 (2): 169–81. doi:10.1016/j.yfrne.2007.10.005. PMC 2386261. PMID 18093638.

Cell surface receptor: G protein-coupled receptors

Class A: Rhodopsin like

Neurotransmitter

Adrenergic	α1 (A B D) α2 (A B C) β1 β2 β3

Purinergic	Adenosine (A1 A2A A2B A3) P2Y (1 2 4 5 6 8 9 10 11 12 13 14)

Serotonin	(all but 5-HT3) 5-HT1 (A B D E F) 5-HT2 (A B C) 5-HT (4 5A 6 7)

Other	Acetylcholine (M1 M2 M3 M4 M5) Dopamine (D1 D2 D3 D4 D5) Histamine (H1 H2 H3 H4) Melatonin (1A 1B 1C) TAAR (1 2 3 5 6 8 9)

Metabolites and
signaling molecules

Eicosanoid	CysLT (1 2) LTB4 (1 2) FPRL1 OXE Prostaglandin (DP (1 2), EP (1 2 3 4), FP) Prostacyclin Thromboxane

Other	Bile acid Cannabinoid (CB1 CB2, GPR (18 55 119)) EBI2 Estrogen Free fatty acid (1 2 3 4) Lactate Lysophosphatidic acid (1 2 3 4 5 6) Lysophospholipid (1 2 3 4 5 6 7 8) Niacin (1 2) Oxoglutarate PAF Sphingosine-1-phosphate (1 2 3 4 5) Succinate

Peptide

Neuropeptide	B/W (1 2) FF (1 2) S Y (1 2 4 5) Neuromedin (B U (1 2)) Neurotensin (1 2)

Other	Anaphylatoxin (C3a C5a) Angiotensin (1 2) Apelin Bombesin (BRS3 GRPR NMBR) Bradykinin (B1 B2) Chemokine Cholecystokinin (A B) Endothelin (A B) Formyl peptide (1 2 3) FSH Galanin (1 2 3) GHB receptor Gonadotropin-releasing hormone (1 2) Ghrelin Kisspeptin Luteinizing hormone/choriogonadotropin MAS (1 1L D E F G X1 X2 X3 X4) Melanocortin (1 2 3 4 5) MCHR (1 2) Motilin Opioid (Delta Kappa Mu Nociceptin & Zeta, but not Sigma) Orexin (1 2) Oxytocin Prokineticin (1 2) Prolactin-releasing peptide Relaxin (1 2 3 4) Somatostatin (1 2 3 4 5) Tachykinin (1 2 3) Thyrotropin Thyrotropin-releasing hormone Urotensin-II Vasopressin (1A 1B 2)

Miscellaneous

Orphan	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)

Other	Adrenomedullin Olfactory Opsin (3 4 5 1LW 1MW 1SW RGR RRH) Protease-activated (1 2 3 4) SREB (1 2 3)

Class B: Secretin like

Adhesion	ADGRG (1 2 3 4 5 6 7)

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

Other	Brain-specific angiogenesis inhibitor (1 2 3) Cadherin (1 2 3) Calcitonin CALCRL CD97 Corticotropin-releasing hormone (1 2) EMR (1 2 3) Glucagon (GR GIPR GLP1R GLP2R) Growth hormone releasing hormone PACAPR1 GPR Latrophilin (1 2 3 ELTD1) Methuselah-like proteins Parathyroid hormone (1 2) Secretin Vasoactive intestinal peptide (1 2)

Class C: Metabotropic glutamate / pheromone

Taste	TAS1R (1 2 3) TAS2R (1 3 4 5 7 8 9 10 13 14 16 19 20 30 31 38 39 40 41 42 43 45 46 50 60)

Other	Calcium-sensing receptor GABA B (1 2) Glutamate receptor (Metabotropic glutamate (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

Androgenics

Receptor
(ligands)

Agonists	4-Chlordehydromethyltestosterone 4-Hydroxytestosterone 5α-Androst-1-ene-3,17-dione 7β-Hydroxyepiandrosterone 11-Ketotestosterone 17-((1-Oxoheptyl)oxy)androstan-3-one 17-((1-Oxopentyl)oxy)androstan-3-one 17-(1-Oxopropoxy)androstan-3-one 17β-Hydroxyandrost-2-ene-2-carbonitrile 19-Norandrostenediol 19-Norandrostenedione 19-Norandrosterone 19-Nordehydrotestosterone Δ¹-Androstenediol Δ¹-Testosterone Δ^1,4-Androstenedione Δ⁴-Androstenediol Δ⁴-Androstenedione Δ^4-Tibolone Δ⁴-Androstenediol Δ⁴-Androstenedione Adrenosterone Androisoxazole Androstanolone Bolandiol Bolasterone Bolazine Boldenone Boldione Bolenol Bolmantalate Calusterone Cl-4AS-1 Clostebol Cloxotestosterone Cortexolone 17α-propionate Danazol Desogestrel Desoxymethyltestosterone DHEA DHEA sulfate Dihydrotestosterone Drostanolone Enestebol Epitiostanol Ethisterone Ethyldienolone Ethylestrenol Fluoxymesterone Formebolone Furazabol Hexabolan Hydroxystenozole Levonorgestrel Mebolazine Medroxyprogesterone acetate Mepitiostane Mesabolone Mestanolone Mesterolone Metandienone/Methandrostenolone Metenolone Metenolone acetate Metenolone enanthate Methandriol Methandriol propionate Methasterone Methylestrenolone Methyltestosterone Metribolone Mibolerone Nandrolone Nandrolone caproate Nandrolone cypionate Nandrolone cyclohexane carboxylate Nandrolone cyclohexylpropionate Nandrolone cyclotate Nandrolone decanoate Nandrolone furylpropionate Nandrolone hexyloxyphenylpropionate Nandrolone hydrogen succinate Nandrolone laurate Nandrolone phenylpropionate Nandrolone propionate Nandrolone undecyclate Norboletone Norclostebol Norethandrolone Norethisterone Norgestrel Oxabolone Oxabolone cypionate Oxandrolone Oxendolone Oxymesterone Oxymetholone Penmesterol Propetandrol Quinbolone Quingestanol acetate Roxibolone Silandrone Stanozolol Stenbolone Stenbolone acetate Testolactone Testosterone Testosterone acetate Testosterone capropate Testosterone cypionate Testosterone decanoate Testosterone enanthate Testosterone isocaproate Testosterone ketolaurate Testosterone nicotinate Testosterone phenylpropionate Testosterone propionate Testosterone undecanoate Tetrahydrogestrinone Thiomesterone Tibolone Tiomesterone Trenboloneca Trenbolone acetate Trestolone

Mixed (SARMs)	AC-262,356 Andarine BMS-564,929 Enobosarm (ostarine) LGD-2226 LGD-3303 LGD-4033 RAD140 S-23 S-40503 TFM-4AS-1

Antagonists	3α-Hydroxytibolone 3β-Hydroxytibolone Abiraterone Abiraterone acetate Apalutamide AZD-3514 Bisphenols (e.g., BADGE, BFDGE, bisphenol A, bisphenol F, bisphenol S) Benorterone Bicalutamide BMS-641,988 BOMT Canrenoic acid Canrenone Chlormadinone acetate Cimetidine Cioteronel Clometerone Cyproterone Cyproterone acetate Delanterone DDT (via metabolite p,p’-DDE) Dieldrin Dienogest Drospirenone Endosulfan Enzalutamide EPI-001 Epitestosterone Fenarimol Flutamide Galeterone Guggulsterone Hydroxyflutamide Inocoterone Ketoconazole Lavender oil Linuron Megestrol acetate Mespirenone Methiocarb Metogest Mifepristone Nilutamide Nomegestrol Nordinone Norgestimate ODM-201 ONC1-13B ORM-15341 Osaterone Oxendolone PF-998425 Potassium canrenoate Prochloraz Procymidone R-2956 Rosterolone RU-58642 RU-58841 Spironolactone Topilutamide (fluridil) Topterone Valproic acid Vinclozolin VT-464 Zanoterone

Enzyme

Modulators	See here instead (modulators of 20,22-desmolase, 17α-hydroxylase/17,20-lyase, 3β-HSD, 17β-HSD, 5α-reductase, and aromatase).

Others

Precursors/prohormones	Cholesterol 22R-Hydroxycholesterol 20α,22R-Dihydroxycholesterol Pregnenolone Pregnenolone sulfate 17-Hydroxypregnenolone Progesterone 17-Hydroxyprogesterone 11-Deoxycortisol (cortodoxone) DHEA DHEA sulfate Δ⁵-Androstenediol Δ⁴-Androstenedione

Indirect	Antigonadotropins (e.g., estrogens, progestogens, prolactin) GnRH agonists (e,g, GnRH, leuprorelin) GnRH antagonists (e.g., cetrorelix) Gonadotropins (e.g., FSH, hCG, LH) Kisspeptin Plasma proteins (ABP, albumin, SHBG)

See also: Estrogenics • Glucocorticoids • Mineralocorticoids • Progestogenics

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