Benztropine Mesylate

Benzotropine is a centrally-acting, antimuscarinic agent used as an adjunct in the treatment of Parkinson's disease.Target: mAChRBenzotropine is a centrally-acting, antimuscarinic agent used as an adjunct in the treatment of Parkinson's disease. It may also be used to treat extrapyramidal reactions, such as dystonia and Parkinsonism, caused by antipsychotics. Symptoms of Parkinson's disease and extrapyramidal reactions arise from decreases in dopaminergic activity which creates an imbalance between dopaminergic and cholinergic activity. Anticholinergic therapy is thought to aid in restoring this balance leading to relief of symptoms. In addition to its anticholinergic effects, benztropine also inhibits the reuptake of dopamine at nerve terminals via the dopamine transporter. Benzotropine also produces antagonistic effects at the histamine H1 receptor [1, 2].Benztropine (BZT) and its analogues inhibit dopamine uptake and bind with moderate to high affinity to the dopamine transporter (DAT). BZT analogues also exhibit varied binding affinities for muscarinic M(1) and histamine H(1) receptors. The BZT analogues showed a wide range of histamine H(1) receptor (K(i)=16-37,600 nM) and DAT (K(i)=8.5-6370 nM) binding affinities [3].

Signaling Pathways >> GPCR/G Protein >> mAChR

Signaling Pathways >> Neuronal Signaling >> mAChR

Research Areas >> Neurological Disease

[1]. Wszola, B.A., K.M. Newell, and R.L. Sprague, Risk factors for tardive dyskinesia in a large population of youths and adults. Exp Clin Psychopharmacol, 2001. 9(3): p. 285-96.

[2]. van Harten, P.N., et al., Intermittent neuroleptic treatment and risk for tardive dyskinesia: Curacao Extrapyramidal Syndromes Study III. Am J Psychiatry, 1998. 155(4): p. 565-7.

[3]. Kulkarni, S.S., et al., Comparative structure-activity relationships of benztropine analogues at the dopamine transporter and histamine H(1) receptors. Bioorg Med Chem, 2006. 14(11): p. 3625-34.

Carbachol | Darifenacin HBr | Arecoline hydrobromide | Pirenzepine, Dihydrochloride | Glycopyrrolate | Imidafenacin | Xanomeline oxalate | Batefenterol | Bethanechol chloride | Cevimeline hydrochloride hemihydrate | Otilonium Bromide | solifenacin | VU0467154 | Anisodamine | Hyoscyamine

MOLECULAR FORMULA :

C21-H25-N-O.C-H4-O3-S

MOLECULAR WEIGHT :

403.58

WISWESSER LINE NOTATION :

T56 A ANTJ A1 GOYR&R &OSW1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Oral

SPECIES OBSERVED :

Human

DOSE/DURATION :

100 ug/kg

TOXIC EFFECTS :

Behavioral - toxic psychosis

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Intraperitoneal

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

65 mg/kg

TOXIC EFFECTS :

Behavioral - convulsions or effect on seizure threshold Behavioral - somnolence (general depressed activity) Lungs, Thorax, or Respiration - respiratory depression

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Oral

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

940 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Subcutaneous

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

353 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Oral

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

91 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Subcutaneous

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

103 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Intravenous

SPECIES OBSERVED :

Rodent - mouse

DOSE/DURATION :

24 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :

LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :

Intravenous

SPECIES OBSERVED :

Mammal - cat

DOSE/DURATION :

33 mg/kg

TOXIC EFFECTS :

Details of toxic effects not reported other than lethal dose value

REFERENCE :

CLDND* Compilation of LD50 Values of New Drugs. (J.R. MacDougal, Dept. of National Health and Welfare, Food and Drug Divisions, 35 John St., Ottawa, Ont., Canada)

TYPE OF TEST :

LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :

Subcutaneous

SPECIES OBSERVED :

Rodent - guinea pig

DOSE/DURATION :

80 mg/kg

TOXIC EFFECTS :

Autonomic Nervous System - parasympatholytic

MUTATION DATA

TYPE OF TEST :

DNA adduct

TEST SYSTEM :

Bacteria - Escherichia coli

DOSE/DURATION :

10 umol/L

REFERENCE :

MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 89,95,1981 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X5595 No. of Facilities: 46 (estimated) No. of Industries: 1 No. of Occupations: 1 No. of Employees: 1071 (estimated) No. of Female Employees: 681 (estimated)