Scopolamine

Modify Date: 2024-01-02 09:23:08

Scopolamine Structure
Scopolamine structure
Common Name Scopolamine
CAS Number 51-34-3 Molecular Weight 303.353
Density 1.3±0.1 g/cm3 Boiling Point 460.3±45.0 °C at 760 mmHg
Molecular Formula C17H21NO4 Melting Point 59ºC
MSDS N/A Flash Point 232.2±28.7 °C

 Use of Scopolamine


Scopolamine is a high affinity (nM) muscarinic antagonist. 5-HT3 receptor-responses are reversibly inhibited by Scopolamine with an IC50 of 2.09 μM.

 Names

Name scopolamine
Synonym More Synonyms

 Scopolamine Biological Activity

Description Scopolamine is a high affinity (nM) muscarinic antagonist. 5-HT3 receptor-responses are reversibly inhibited by Scopolamine with an IC50 of 2.09 μM.
Related Catalog
Target

5-HT3 Receptor:2.09 μM (IC50)

mAChR

In Vitro Application of Scopolamine to oocytes expressing 5-HT3 receptors does not elicit a response when applied alone, but causes a concentration-dependent inhibition of the response during a co-application of 2 μM 5-HT. The pIC50 value for Scopolamine is 5.68±0.05 (IC50=2.09 μM, n=6) with a Hill Slope of 1.06 ± 0.05. This gave a Kb of 3.23 μM. The same concentration-dependent effect is also seen when Scopolamine is applied during the 5-HT application. To further test for a competitive binding at the 5-HT3 receptor, the competition of unlabelled Scopolamine is measured with [3H]granisetron, an established high-affinity competitive antagonist at these receptors. Scopolamine displays concentration-dependent competition with 0.6 nM [3H]granisetron (~Kd), yielding an average pKi of 5.17±0.24 (Ki=6.76 μM, n=3)[1].
In Vivo In the histopathology study, there is no significant change in the histology of the brain. However, it is observed that there is a reduction in density of cells in the hippocampus of the control mice pretreated with Scopolamine who received only distilled water[2]. Scopolamine administration alone significantly increases the activity of Acetylcholinesterase enzyme (AchE) (7.98±0.065; P<0.001) when compared to the normal group (3.06±0.296). The animals treated with Scopolamine report a significant increase (34.61±4.85; P<0.01) in levels of malondialdehyde (MDA) as compared to the normal group (12.82±2.86). The Scopolamine-treated group shows significant decrease in reduced glutathione (GSH) level (P<0.001; 0.1504±0.03) as compared to the normal group (0.3906±0.02). The Scopolamine-treated rats show a significant increase in the concentration ofβ amyloid (Aβ1-42) (P<0.001; 146.2±1.74) as compared to the normal group (43.21±3.46)[3].
Kinase Assay Saturation binding (8 point) curves are measured by incubating either crude extracts of HEK 293 cells stably expressing 5-HT3 receptors, or Guinea pig membrane preparations, in 0.5 mL incubations containing 10 mM HEPES buffer (pH 7.4) and 0.1-1 nM [3H]granisetron or 1-10 nM [3H]N-methylScopolamine. Competition binding (10 point) is determined by incubating the same receptors preparations in 0.5 mL HEPES buffer containing either 0.6 nM [3H]granisetron or 0.6 nM [3H]N-methylScopolamine, and differing concentrations of competing ligands. Non-specific binding is determined with 1 mM quipazine or 10 μM Scopolamine respectively. Incubations are terminated by filtration onto Whatman GF/B filters wetted with HEPES buffer+0.3% polyethyleneimine, followed by two rapid washes with ice-cold HEPES buffer. Protein concentration is calculated using a Lowry protein assay with bovine serum albumin standards. Radioactivity is measured using a Tri-Carb 2100 TR scintillation counter[1].
Animal Admin Mice[2] The mice are weighed, labeled and grouped into seven groups of 5 animals each after which all animals are pre-injected intraperitoneally with 3 mg/kg Scopolamine. Groups 1-3 are administered 0.2 mL equivalent doses of 4 mg/kg, 6 mg/kg and 8 mg/kg of the extract of Morinda lucida while groups 4-6 are given same doses of Peltophorum pterocarpum extract and group 7 is given 0.2 mL of distilled water (negative control) for 3 consecutive days. Rats[3] Healthy male Wistar rats (12 months old) weighing 180–200 g are used in this study. Rats are divided into five groups (n=6/group); Group I-normal control, Group II-disease control (Scopolamine hydrobromide 3 mg/kg, i.p.), Group III-Scopolamine+Quercetin (25 mg/kg, p.o.), Group IV-standard treatment (Scopolamine+Donepezil hydrochloride 3 mg/kg, p.o.), and Group V-Scopolamine+Quercetin (25 mg/kg, p.o.)+Donepezil (3 mg/kg, p.o.). Group III, IV, and V rats are dosed every 24 h interval with respective drugs for 14 consecutive days. The acquisition trail for Morris water maze, elevated plus maze, and passive avoidance paradigm is carried out on the 14th day, and Scopolamine (3 mg/kg, i.p.) is administered on the 14th day after the acquisition trail to all groups except normal control group, which provoke the cognitive impairment in rats. Retention of memory is tested on the 15th day, and on the same day, rats are sacrificed and brain tissues are isolated to estimate acetylcholinesterase enzyme (AchE) and brain oxidative stress markers such as lipid peroxidase (LPO), glutathione (GSH) (reduced). ELISA kit is used to estimate β amyloid (Aβ1-42) level. The hippocampus of rat brains is dissected out and studied for histopathological changes.
References

[1]. Lochner M, et al. The muscarinic antagonists Scopolamine and atropine are competitive antagonists at 5-HT3 receptors. Neuropharmacology. 2016 Sep;108:220-8.

[2]. O ET, et al. COGNITIVE-ENHANCING PROPERTIES OF MORINDA LUCIDA (RUBIACEAE) AND PELTOPHORUM PTEROCARPUM (FABACEAE) IN SCOPOLAMINE-INDUCED AMNESIC MICE. Afr J Tradit Complement Altern Med. 2017 Mar 1;14(3):136-141.

[3]. Pattanashetti LA, et al. Evaluation of neuroprotective effect of Quercetin with Donepezil in Scopolamine-induced amnesia in rats. Indian J Pharmacol. 2017 Jan-Feb;49(1):60-64.

 Chemical & Physical Properties

Density 1.3±0.1 g/cm3
Boiling Point 460.3±45.0 °C at 760 mmHg
Melting Point 59ºC
Molecular Formula C17H21NO4
Molecular Weight 303.353
Flash Point 232.2±28.7 °C
Exact Mass 303.147064
PSA 62.30000
LogP 0.76
Vapour Pressure 0.0±1.2 mmHg at 25°C
Index of Refraction 1.614

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
VR3675000
CHEMICAL NAME :
Scopolamine
CAS REGISTRY NUMBER :
51-34-3
LAST UPDATED :
199710
DATA ITEMS CITED :
22
MOLECULAR FORMULA :
C17-H21-N-O4
MOLECULAR WEIGHT :
303.39
WISWESSER LINE NOTATION :
T C356 A AN DOTJ A1 HOVYR&1Q

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Human
DOSE/DURATION :
2 ug/kg
TOXIC EFFECTS :
Brain and Coverings - changes in surface EEG Behavioral - hallucinations, distorted perceptions Behavioral - excitement
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Human - man
DOSE/DURATION :
14 ug/kg
TOXIC EFFECTS :
Behavioral - hallucinations, distorted perceptions Behavioral - ataxia
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Human - woman
DOSE/DURATION :
13 ug/kg
TOXIC EFFECTS :
Behavioral - hallucinations, distorted perceptions Behavioral - ataxia
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intramuscular
SPECIES OBSERVED :
Human - man
DOSE/DURATION :
24 ug/kg
TOXIC EFFECTS :
Behavioral - hallucinations, distorted perceptions
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intramuscular
SPECIES OBSERVED :
Human
DOSE/DURATION :
4 ug/kg
TOXIC EFFECTS :
Sense Organs and Special Senses (Eye) - mydriasis (pupillary dilation) Behavioral - hallucinations, distorted perceptions
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
2650 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 :
1275 mg/kg
TOXIC EFFECTS :
Behavioral - tremor Behavioral - rigidity (including catalepsy)
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
400 mg/kg
TOXIC EFFECTS :
Sense Organs and Special Senses (Eye) - effect, not otherwise specified Behavioral - excitement Behavioral - irritability
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
1700 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 :
100 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 :
Subcutaneous
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
75 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 :
Rodent - rabbit
DOSE/DURATION :
50 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intraperitoneal
DOSE :
1 mg/kg
SEX/DURATION :
female 13 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Newborn - biochemical and metabolic Reproductive - Effects on Newborn - behavioral
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Parenteral
DOSE :
50600 ug/kg
SEX/DURATION :
female 6-16 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Embryo or Fetus - fetal death
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Parenteral
DOSE :
649 mg/kg
SEX/DURATION :
female 6-16 day(s) after conception
TOXIC EFFECTS :
Reproductive - Fertility - post-implantation mortality (e.g. dead and/or resorbed implants per total number of implants)

MUTATION DATA

TYPE OF TEST :
Sister chromatid exchange
TEST SYSTEM :
Human Lymphocyte
DOSE/DURATION :
1 mg/L
REFERENCE :
CMJODS Chinese Medical Journal (Beijing, English Edition). (China International Book Trading Corp., POB 2820, Beijing, Peop. Rep. China) V.1- 1975- Adopted vol. no. 92 in 1979. Volume(issue)/page/year: 101,339,1988 *** REVIEWS *** TOXICOLOGY REVIEW CLANA4 Clinical Anesthesia. (Philadelphia, PA 19103) V.1-11, 1963-76. Volume(issue)/page/year: 10(Pt 1),11,1973 TOXICOLOGY REVIEW DPIRDU Dangerous Properties of Industrial Materials Report. (Van Nostrand Reinhold, 115 Fifth Ave., New York, NY 10003) V.1- 1981- Volume(issue)/page/year: 2(3),16,1982

 Safety Information

Hazard Codes T+
Risk Phrases R26/27/28
Safety Phrases 25-45
RIDADR UN 1544PSN2 6.1 / PGII

 Articles44

More Articles
Evidence for encoding versus retrieval scheduling in the hippocampus by theta phase and acetylcholine.

J. Neurosci. 33(20) , 8689-704, (2013)

The formation of new memories requires new information to be encoded in the face of proactive interference from the past. Two solutions have been proposed for hippocampal region CA1: (1) acetylcholine...

[Effect of acteoside on learning and memory impairment induced by scopolamine in mice].

Zhongguo Zhong Yao Za Zhi 37(19) , 2956-9, (2012)

To study on the effect of acteoside on learning and memory of dementia mice.Mice were orally administered with acteoside for 10 days. Scopolamine was used to establish the acquired learning disability...

M1 and m2 muscarinic receptor subtypes regulate antidepressant-like effects of the rapidly acting antidepressant scopolamine.

J. Pharmacol. Exp. Ther. 351(2) , 448-56, (2014)

Scopolamine produces rapid and significant symptom improvement in patients with depression, and most notably in patients who do not respond to current antidepressant treatments. Scopolamine is a nonse...

 Synonyms

l-Scopolamine
Atrochin
Transderm-V
Tropic Acid Ester with Scopine
TRANSDERM SCOP
Benzeneacetic acid, α-(hydroxymethyl)-, (1R,2R,4S,5S)-9-methyl-3-oxa-9-azatricyclo[3.3.1.0]non-7-yl ester, (αS)-
Transcop
Skopolate
6b,7b-Epoxy-3a-tropanyl S-(-)-Tropate
scopadulcic acid B
Skopyl
1-METHYL-3-NONYLIMIDAZOLIUM BROMIDE, 99%
SCOP
(1R,2R,4S,5S,7s)-9-Methyl-3-oxa-9-azatricyclo[3.3.1.0]non-7-yl (2S)-3-hydroxy-2-phenylpropanoate
Atroscine
[7(S)-(1a,2b,4b,5a,7b)]-a-(Hydroxymethyl)benzeneacetic Acid 9-Methyl-3-oxa-9-azatricyclo[3.3.1.02,4]non-7-yl Ester
(-)-Scopolamine
ATROQUIN
scopolamine
6β,7β-Epoxy-3α-tropanyl S-(-)-tropate
UNII-DL48G20X8X
Scopoderm TTS
6b,7b-Epoxy-1aH,5aH-tropan-3a-ol (-)-Tropate
Scopoderm
(−)-Scopolamine
Scopine tropate
EINECS 200-090-3
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