GUANABENZ HYDROCHLORIDE

Guanabenz (hydrochloride) is an oral α-2-adrenoceptor agonist, has antihypertensive effect and antiparasitic activity. Guanabenz (hydrochloride) interferes ER stress-signalling and has protective effects in cardiac myocytes. Guanabenz (hydrochloride) also is used for the research of high blood pressure(equivalent).

Research Areas >> Cardiovascular Disease

Signaling Pathways >> GPCR/G Protein >> Adrenergic Receptor

Guanabenz (hydrochloride) (0.5–50 μM, 24 h) is treated with increasing concentrations for 24 hours not affect cell viability. Guanabenz (hydrochloride) (0.5–50 μM, 24 h) alone not affects the UPR targets, neither on mRNA or protein level nor the phosphorylation status of eIF2a. Guanabenz also not induces GADD34 or the constitutively active form CReP. Guanabenz (hydrochloride) (0.5–50 μM, 24 h) alone not induces ER stress in neonatal rat cardiomyocytes[1]. Cell Viability Assay[1] Cell Line: Neonatal rat cardiac myocytes (NRCM) Concentration: 0.5–50 μM Incubation Time: 24 h Result: Did not affect cell survival. RT-PCR[1] Cell Line: Neonatal rat cardiac myocytes (NRCM) Concentration: 0.5–50 μM Incubation Time: 24 h Result: Did not affect levels of UPR targets. Western Blot Analysis[1] Cell Line: Neonatal rat cardiac myocytes (NRCM) Concentration: 0.5–50 μM Incubation Time: 24 h Result: Increased the levels of low panel concentration-dependent UPR targets proteins.

Guanabenz (hydrochloride) (5 mg/kg/day; i.p.; for 3 weeks) can reproducibly reduce brain cyst burden. Guanabenz (hydrochloride) (5 mg /kg/d, i.p., oral; 10 mg/kg/d, gavage; for 3 weeks) reverses Toxoplasma-induced hyperactivity in latently infected mice. Guanabenz (hydrochloride) (100 and 320 μg/kg and 1 mg/kg, i.v., over a period of 5 min at intervals of 40 min) reduces sympathetic outflow, heart rate and blood pressure in debuffered cats[2][3]. Animal Model: BALB/cJ mice[2] Dosage: 5 mg/kg Administration: 5 mg/kg/day; i.p. ; for 3 weeks Result: Reduced the latent brain cysts in both male and female BALB/cJ mice. Animal Model: BALB/cJ mice[2] Dosage: 5 mg/kg; 10 mg/kg Administration: 5 mg /kg/d, i.p., oral; 10 mg/kg/d, gavage; for 3 weeks Result: Reversed parasite-induced hyperactivity to near-baseline levels. Animal Model: Cats[3] Dosage: 100 and 320 μg/kg and 1 mg/kg Administration: 100 and 320 μg/kg and 1 mg/kg, i.v., over a period of 5 min at intervals of 40 min Result: Declined markedly blood pressure and nerve activity.

[1]. Christiane Neuber, et al. Guanabenz interferes with ER stress and exerts protective effects in cardiac myocytes. PLoS One. 2014 Jun 3;9(6):e98893.

[2]. Jennifer Martynowicz, et al. Guanabenz Reverses a Key Behavioral Change Caused by Latent Toxoplasmosis in Mice by Reducing Neuroinflammation. mBio. 2019 Apr 30;10(2):e00381-19.

[3]. T Baum, et al. Studies on the centrally mediated hypotensive activity of guanabenz. Eur J Pharmacol. 1976 May;37(1):31-44.

MOLECULAR FORMULA :

C8-H8-Cl2-N4.Cl-H

MOLECULAR WEIGHT :

267.56

WISWESSER LINE NOTATION :

MUYZMNU1R BG FG &GH

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Subcutaneous

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

100 mg/kg

TOXIC EFFECTS :

Behavioral - convulsions or effect on seizure threshold Behavioral - excitement Behavioral - ataxia

REFERENCE :

YKKZAJ Yakugaku Zasshi. Journal of Pharmacy. (Nippon Yakugakkai, 2-12-15 Shibuya, Shibuya-ku, Tokyo 150, Japan) No.1- 1881- Volume(issue)/page/year: 95,966,1975