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RISS 인기검색어
- 검색키워드
- 저자 : Amitabha Dey (검색결과 4 건)
- 무료
- 기관 내 무료
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Analgesic activity of a Withania somnifera extract in stressed mice
Amitabha Dey,Vikas Kumar,Shyam Sunder Chatterjee 경희대학교 융합한의과학연구소 2016 Oriental Pharmacy and Experimental Medicine Vol.31 No.4
Withania somnifera is an important Ayurvedic Rasayana herb, the roots of which are often used in traditionally known systems of medicine as tonic or for rejuvenation purposes. Effects of a single and ten daily oral doses (10, 20 and 40 mg/kg) of an analytically well standardized Withania somnifera root extract against foot shock stress triggered transient hyperthermia and hotplate test for analgesics in male mice were quantified. Body weights and basal rectal temperatures of animals were recorded on all observational days and on the 11th and 12th day of the experiment, all animals were subjected to tail suspension and pentobarbital hypnosis tests respectively. Daily dose dependent efficacy of the tested extract in stress induced hyperthermia test and in hot plate test increased with increasing number of treatment days, and its dose dependent inhibitory effect on immobility time in tail suspension were observed after its 11 daily oral doses. Daily handling and intermittent foot shock stress triggered body weight losses and elevations in basal core temperatures were almost completely prevented even by its lowest daily dose (10 mg/kg/day) tested. Repeated daily low oral doses of the Withania somnifera extract is effective in suppressing diverse stress responses, and its centrally acting analgesics and anxiolytics or antidepressants like efficacies increase with increasing numbers of treatment days. These observations reaffirm that Withania somnifera is an adaptogenic herb, and suggest that its effective therapeutic doses has to be adjusted according to the pre-existing allostatic load of patients.
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A bioassay system for pharmacological standardization of Withania somnifera derived herbal remedies
Dey, Amitabha,Chatterjee, Shyam Sunder,Kumar, Vikas Cellmed Orthocellular Medicine and Pharmaceutical 2019 셀메드 (CellMed) Vol.9 No.1
Background: Contents of bioactive substances extractable from different parts of terrestrial plants vary enormously. Aim: To ascertain that parts of Withania somnifera other than its roots can also be used for prevention and cure of unavoidable stress triggered central hypersensitivity to pain. Material and Methods: Groups of male or female mice treated either with Withania somnifera extracts or with metformin, aspirin, imipramine, diazepam and niacin for 11 consecutive days were subjected to "foot-shock stress-induced hyperthermia" and "hot plate" tests on the 1st, 5th, 7th, and 10th days of the experiments. On the 11th day, they were subjected to tail suspension test and on 12th day pentobarbital hypnosis test. Results: Except for diazepam and imipramine, protective effects of all other tested drugs as well as of the Withania somnifera extracts against stress-induced central hypersensitivity to pain were accompanied by their preventive effects against foot-shock stress-induced body weight losses. All observed stress response suppressing effects of all test agents increased with increasing numbers of treatment days. However, mean duration of pentobarbital-induced sleep was shorter in the extracts treated groups and longer in the diazepam treated ones only. Conclusions: Reported observations reveal that pharmacological activity profile of Withania somnifera extracts in male and female mice are almost identical, and are not like those of several drugs currently often prescribed for the treatment of diabetes-associated comorbidities. Withanolides are not the only extractable bioactive constituents of Withania somnifera. The described bioassay system is well suited for pharmacological standardization of diverse types of Withania somnifera extracts.
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Gastroprotective and digestive potential of an Ayurvedic asava–arishta preparation
Anjan Adhikari,Amitabha Dey,Satyajyoti Kanjilal,Rajarshi Biswas,Deepa Gandhi,Kamarujjaman Mondal,Bibhuti Nath Bhatt,Tapas Kumar Sur,Satyabrata Mohapatra,Avinash Narwaria,Chandra Kant Katiyar 경희대학교 융합한의과학연구소 2018 Oriental Pharmacy and Experimental Medicine Vol.18 No.4
Asavas and arishtas are considered as important Ayurvedic self-fermented dosage forms which are being used widely to promote health and well-being and for management of digestive and metabolic disorders. The present investigation was carried out to study the potential of an Ayurvedic polyherbal asava–arishta preparation (ZP) in gastroprotection, intestinal motility and gastric dyspepsia in experimental rodent models. The gastroprotective effect of ZP at doses 1.5, 3 and 6 ml/ kg of body weight was studied using battery of animal models such as pyloric ligation in rats, intestinal transit time using charcoal meal test, gastric emptying and digestive stimulation action in rats. In addition, anti-spasmodic activity was studied using isolated guinea pig’s ileum. The role digestive enzymes such as pepsin, α-amylase and lipase were accessed by various enzymatic assays. A dose-dependent and statistically significant (p < 0.01) inhibitory effect on reducing gastric volume, free acidity, total acidity and ulcer index were observed in ZP treated animals as compared to the control. ZP also enhanced the mucin content of the gastric juice. Pre-treatment with ZP produced a dose-dependent effect in reducing intestinal motility, intestinal spasms and increased the gastric emptying time in rats. These observations validated the age old claims of ZP for its use as digestive tonic. Thus, results concluded that ZP is having potential to improve digestion and reduces recurrent digestive ailments.
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Chemistry and pharmacology of withania somnifera: An update
Vikas Kumar,Amitabha Dey,Mallinath B. Hadimani,Tatjana Marcović,Mila Emerald 셀메드 세포교정의약학회 2015 TANG Vol.5 No.1
Withania somnifera (Ashwagandha) is an important Rasayana herb and widely considered as Indian ginseng in Ayurveda. In traditional system of Indian medicine, it is used as tonic to rejuvenate the body and increase longevity. In Ayurvedic preparations, various parts of the plant have been used to treat variety of ailments that affect the human health. However, dried roots of the plant are widely used for the treatment of nervous and sexual disorders. The major active chemical constituents of this plant are withanolides, which is responsible for its wide range of biological activities. Since the beginning of the 20th century, a significant amount of research has been done and efforts are ongoing to further explore other bioactive constituents, and many pharmacological studies have been carried out to describe their disease preventing mechanisms. In this chapter, we have reviewed the chemistry and pharmacological basis of W. somnifera in various human ailments.
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