Browsing by Author "R.K. Goel"

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Anti-inflammatory & anti-ulcerogenic activity of amentoflavone
(1987) S.S. Gambhir; R.K. Goel; G. Das Gupta
[No abstract available]
Anti-ulcer drugs from indigenous sources with emphasis on Musa sapientum, Tamrabhasma, Asparagus racemosus and Zingiber officinale
(2002) R.K. Goel; K. Sairam
Sula, Parinamasula and Amlapitta are clinical entities recognized by ayurveda, akin to peptic ulcer and functional dyspepsia. Many indigenous drugs have been advocated in ayurveda for treatment of dyspepsia. Our laboratory has been engaged in screening of various indigenous herbal and metallic drugs for their potential use in peptic ulcer diseases, taking lead from Ayurveda and have reported anti-ulcer and ulcer-healing properties of Tectona grandis (lapachol), Rhamnus procumbens (kaempferol), Rhamnus triquerta (emodin), Withania somnifera (acylsteryl glycoside), Shilajit (fulvic acid and carboxymethoxybiphenyl), Datura fastuosa (withafastuosin E), Fluggea microcarpa and Aegle marmelos (pyrano- and iso- coumarins) etc., along with their mechanism of action. The present article includes the detailed exploration of ulcer protective and healing effects of unripe plantain banana, tambrabhasma and Asparagus racemosus on various models of experimental gastroduodenal ulceration and patients with peptic ulcer. Their effects on mucin secretion, mucosal cell shedding, cell proliferation, anti-oxidant activity, glycoproteins, and PG synthesis have been reported. Clinical trials of these drugs for evaluating their potential ulcer healing effects in peptic ulcer patients have been done. Their potential ulcer protective effects both, experimental and clinical seemed to be due to their predominant effects on various mucosal defensive factors rather than on the offensive acid-pepsin secretion. Thus, the above herbal / herbo-mineral drugs do have potential usefulness for treatment of peptic ulcer diseases.
Anti-ulcerogenic activity of GABA and GABA mimetic agents in rats
(1996) R.K. Goel; W.R. Abbas; R.N. Maiti; S.K. Bhattacharya
To elucidate the involvement of peripheral γ-aminobutyric acid (GABA) and some GABA-mimetic agents in different models of gastric and duodenal ulcerations in rats and guinea pigs, effects of GABA, baclofen (GABA(B) agonist), diazepam, γ-butyrolactone (GABA receptor agonist), sodium valproate, isoniazid (GABA-T inhibitor) and glycine (an inhibitory neurotransmitter), given po or ip were studied. All the drugs significantly reduced the ulcer index, incidence and number of ulcer in various models of gastric ulcers except glycine which failed to protect in reserpine-induced ulcers in rats. None of the drugs, except diazepam, had any protective effect on histamine-induced gastric ulcers in guinea pigs. Similarly, no protection was observed by any drug against cysteamine-induced duodenal ulcers in rats, while sodium valproate, isoniazid and glycine significantly decreased number of ulcers against histamine-induced duodenal ulcers in guinea pigs. The results suggest that GABA and GABA-mimetic agents, and glycine, an inhibitory neurotransmitter, afforded protection against some experimental models of peptic ulcer in rats. The effects appear to be due to their inhibitory effect on mucosal defensive factors.
Anti-ulcerogenic effect of banana powder (Musa sapientum var. paradisiaca) and its effect on mucosal resistance
(1986) R.K. Goel; Saroj Gupta; R. Shankar; A.K. Sanyal
Orally administered banana pulp powder (Musa sapientum var. paradisiaca) was shown to have significant anti-ulcerogenic activity in rats subjected to aspirin, indomethacin, phenylbutazone, prednisolone and cysteamine and in guinea-pigs subjected to histamine. Banana powder not only increased mucosal thickness but also significantly increased [3H]thymidine incorporation into mucosal DNA. Relative to untreated control sections, histological studies showed that banana treatment increased staining by alcian blue in the apical cells with staining noted in the deeper layers of the mucosal glands. Banana-treated and control sections were also stained for DNA by the Feulgen reaction. The banana-treated sections showed a greater aggregation and intensity of pink spots when compared to controls. The present study suggests that banana powder treatment not only strengthens mucosal resistance against ulcerogens but also promotes healing by inducing cellular proliferation. © 1986.
Antidepressant activity of standardized extract of Bacopa monniera in experimental models of depression in rats
(Urban und Fischer Verlag Jena, 2002) K. Sairam; M. Dorababu; R.K. Goel; S.K. Bhattacharya
Bacopa monniera Wettst. (syn. Herpestis monniera L.; Scrophulariaceae) is a commonly used Ayurvedic drug for mental disorders. The standardized extract was reported earlier to have significant anti-oxidant effect, anxiolytic activity and improve memory retention in Alzheimer's disease. Presently, the standardized methanolic extract of Bacopa monniera (bacoside A - 38.0 ± 0.9) was investigated for potential antidepressant activity in rodent models of depression. The effect was compared with the standard antidepressant drug imipramine (15 mg/kg, ip). The extract when given in the dose of 20 and 40 mg/kg, orally once daily for 5 days was found to have significant antidepressant activity in forced swim and learned helplessness models of depression and was comparable to that of imipramine.
Antidiabetic and antiulcer effects of extract of Eugenia jambolana seed in mild diabetic rats: Study on gastric mucosal offensive acid-pepsin secretion
(2009) Aditi Chaturvedi; G. Bhawani; P.K. Agarwal; Shalini Goel; A. Singh; R.K. Goel
Diabetes has been reported to increase propensity to peptic ulceration through its effect both on offensive and defensive mucosal factors. Seeds of Eugenia jambolana (EJ) have been reported to have both antidiabetic as well as ulcer protective effects. The present study evaluates the antidiabetic effects of ethanolic extract of dried seed kernel of Eugenia jambolana (EJE) and its comparative effect on gastric ulceration and acidpepsin secretion with standard antisecretory FL-blocker. Ranitidine and antidiabetic glibenclamide with a premise that Eugenia jambolana may show better ulcer healing effects by promoting defensive or reducing offensive mucosal factors in mild diabetes (MD) rats. MD was produced in adult rats by administration of streptozotocin (45 mg/kg, ip). EJE was given orally in the doses of 100-400 mg/kg for 10 days and in the dose of 200 mg/kg for 30 days respectively to study its dose- and time-dependent effects on various diabetic parameters like blood glucose, serum cholesterol and triglycerides, insulin level and glycosylated hemoglobin. For ulcer protective and gastric secretion studies, EJE (200 mg/kg) was given orally for 10 days against 2 h cold restraint stress (CRS)-, 4 h pylorus ligation (PL), aspirin (ASP, 200 mg/kg, 4 h) - and 95% ethanol (EtOH, 1 ml/200 g, 1 h)-induced gastric ulcers and offensive acid-pepsin secretion after 4 h PL with cooccurring MD in rats. EJE showed dose-dependent decrease in blood glucose level in MD rats. Blood glucose level remained stable in mild diabetic rats from 3rd day onwards after streptozotocin administration (taken as 1st day for treatment) and EJE (200 mg/kg) showed anti-hyperglycemic effect on 10th day of its administration. Further, EJE in the above dose also decreased cholesterol level with little or no effect on triglycerides level and reversed the decrease and increase in insulin and glycosylated hemoglobin level near to the normal level as observed alter 30 days treatment in MD rats. MD rats exhibited an increased propensity to gastric ulceration induced by CRS, ASP, EtOH and PL and caused increase in acid-pepsin secretion. EJE was not only effective in reversing the increased propensity to ulceration in diabetic rats but also decreased the acid-pepsin output better than glibenclamide. The ulcer protective effect of Eugenia Jambolana seems to be due to its antidiabetic and gastric antisecretory effects.
Antiinflammatory and antiulcer effects of Kaempferol, a flavone, isolated from Rhamnus procumbens
(1988) R.K. Goel; V.B. Pandey; S.P.D. Dwivedi; Y.V. Rao
[No abstract available]
Antioxidant capacity and radical scavenging effect of polyphenol rich Mallotus philippenensis fruit extract on human erythrocytes: An in vitro study
(Hindawi Publishing Corporation, 2014) Mayank Gangwar; Manish Kumar Gautam; Amit Kumar Sharma; Yamini B. Tripathi; R.K. Goel; Gopal Nath
Mallotus philippinensis is an important source of molecules with strong antioxidant activity widely used medicinal plant. Previous studies have highlighted their anticestodal, antibacterial, wound healing activities, and so forth. So, present investigation was designed to evaluate the total antioxidant activity and radical scavenging effect of 50% ethanol fruit glandular hair extract (MPE) and its role on Human Erythrocytes. MPE was tested for phytochemical test followed by its HPLC analysis. Standard antioxidant assays like DPPH, ABTS, hydroxyl, superoxide radical, nitric oxide, and lipid peroxidation assay were determined along with total phenolic and flavonoids content. Results showed that MPE contains the presence of various phytochemicals, with high total phenolic and flavonoid content. HPLC analysis showed the presence of rottlerin, a polyphenolic compound in a very rich quantity. MPE exhibits significant strong scavenging activity on DPPH and ABTS assay. Reducing power showed dose dependent increase in concentration absorption compared to standard, Quercetin. Superoxide, hydroxyl radical, lipid peroxidation, nitric oxide assay showed a comparable scavenging activity compared to its standard. Our finding further provides evidence that Mallotus fruit extract is a potential natural source of antioxidants which have a protective role on human Erythrocytes exhibiting minimum hemolytic activity and this justified its uses in folklore medicines. © 2014 Mayank Gangwar et al.
Antiulcer activity of naturally occurring pyrano- coumarin and isocoumarins and their effect on prostanoid synthesis using human colonic mucosa
(1997) R.K. Goel; R.N. Maiti; M. Manickam; A.B. Ray
Oral administration of bergenin and norbegenin, two isocoumarins, isolated from the leaves and roots of Flueggea microcarpa and luvangetin, a pyranocoumarin isolated from the seeds of Aegle marmelos, Correa, showed significant protein against pylorus-ligated and aspirin-induced gastric ulcers in rats and cold restraint stress-induced gastric ulcers in rats and guinea pigs. The study on prostaglandins release by human colonic mucosal incubates, indicated a concentration-dependent (1-10 μg/ml) stimulatory effect of bergenin and norbergenin, while luvangetin (1-10 mg/ml) did not produce any effect. The results suggest that gastroprotective effects of bergenin and norbergenin could be due to increased prostaglandin while, some other mucosal defensive factors may be involved for luvangetin.
Antiulcerogenic activity of Satavari mandur-An ayurvedic herbo-mineral preparation
(2002) G.K. Datta; K. Sairam; S. Priyambada; P.K. Debnath; R.K. Goel
Satavari mandur (SM) is a herbo-mineral preparation containing Asparagus racemosus, which finds mention in ancient Indian texts for treatment of gastric ulcers. The ulcer protective effect of SM, 125-500 mg/kg given orally, twice daily for three, five and seven days, was studied on cold restraint stress-induced gastric ulcer in rats. The effective regimen was found to be 250 mg/kg given for five days and hence was used for further experiments. SM showed significant protection against acute gastric ulcers induced by pyloric ligation but was ineffective against aspirin- and ethanol-induced ulcers. Further, gastric juice studies showed that, SM significantly increased the mucosal defensive factors like mucus secretion, but had little of no effect on offensive factors like acid and pepsin secretion.
Antiulcerogenic and anti-inflammatory effects of emodin, isolated from Rhamnus triquerta wall
(1991) R.K. Goel; G. Das Gupta; S.N. Ram; V.B. Pandey
[No abstract available]
Antiulcerogenic and antiinflammatory studies with shilajit
(1990) R.K. Goel; R.S. Banerjee; S.B. Acharya
In folk medicine, shilajit has been used to treat diverse clinical conditions ranging from peptic ulcer to bone healing. The present study was conducted to evaluate the possible antiulcerogenic and antiinflammatory activities of shilajit obtained from the rocky mountains of Zarlek, Badekshan, Afghanistan. Shilajit increased the carbohydrate/protein ratio and decreased gastric ulcer index, indicating an increased mucus barrier. Shilajit was found to have significant antiinflammatory effect in carrageenan-induced acute pedal oedema, granuloma pouch and adjuvant-induced arthritis in rats. The results of the present study thus substantiate the use of shilajit in peptic ulcer and inflammation. © 1990.
Azadirachta indica attenuates colonic mucosal damage in experimental colitis induced by trinitrobenzene sulfonic acid
(2013) M.K. Gautam; Shalini Goel; R.R. Ghatule; A. Singh; V.K. Joshi; R.K. Goel
Azadirachta indica leaves indicated the presence of active principles with proven antioxidants, antiinflammatory, immunomodulatory, free radical scavenging and healing properties. In the present study we evaluated the healing effects of 50% ethanol extract of dried leaves of Azadirachta indica on trinitrobenzene sulfonic acid-induced colitis in rats. Azadirachta indica extract (500 mg/kg) was administered orally, once daily for 14 days and studied for its effects on diarrhoea, food and water intake, body weight changes, colonic damage and inflammation, histology, antibacterial activity and free radicals (nitric oxide and lipid peroxidation), antioxidants (superoxide dismutase, catalase and reduced glutathione) and myeloperoxidase activities in colonic tissue. Intracolonic trinitrobenzene sulfonic acid increased colonic mucosal damage and inflammation, diarrhea, but decreased body weight which were reversed by Azadirachta indica extract and sulfasalazine (positive control) treatments. Azadirachta indica extract showed antibacterial activity. Azadirachta indica extract and sulfasalazine enhanced the antioxidants but decreased free radicals and myeloperoxidase activities affected in trinitrobenzene sulfonic acid-induced colitis. Azadirachta indica extract, thus seemed to be effective in healing trinitrobenzene sulfonic acid-induced colitis in rats.
Curative effect of Terminalia chebula extract on acetic acid-induced experimental colitis: Role of antioxidants, free radicals and acute inflammatory marker
(2013) M.K. Gautam; Shalini Goel; R.R. Ghatule; A. Singh; G. Nath; R.K. Goel
The present study has evaluated the healing effects of extract of dried fruit pulp of Terminalia chebula (TCE) on acetic acid (AA)-induced colitis in rats. TCE (600 mg/kg) showed healing effects against AA-induced colonic damage score and weight when administered orally daily for 14 days. TCE was further studied for its effects on various physical (mucus/blood in stool and stool frequency, food and water intake and body weight changes), histology, antibacterial activity and free radicals (NO and LPO), antioxidants (SOD, CAT and GSH) and myeloperoxidase in colonic tissue. Intra-colonic AA administration increased colonic mucosal damage and inflammation, mucus/bloody diarrhoea, stool frequency, but decreased body weight which were reversed by TCE and sulfasalazine (SS, positive control) treatments. TCE showed antibacterial activity and both TCE and SS enhanced the antioxidants, but decreased free radicals and myeloperoxidase activities affected in acetic acid-induced colitis. TCE indicated the presence of active principles with proven antioxidants, anti-inflammatory, immunomodulatory, and free radical scavenging and healing properties. Thus, TCE seemed to be safe and effective in healing experimental colitis. © 2012 Springer Basel AG.
Drug prescription in elderly
(1999) K. Sairam; Ch.V. Rao; R.K. Goel
[No abstract available]
Effect of 5 hydroxytryptamine antagonist on gastric secretion in albino rats
(1975) P.K. Debnath; R.K. Goel; A.K. Sanyal
[No abstract available]
Effect of aqueous extract of neem (Azadirachta indica) leaves on offensive and diffensive gastric mucosal factors in rats
(2006) M. Dorababu; M.C. Joshi; G. Bhawani; M. Mohan Kumar; Aditi Chaturvedi; R.K. Goel
Standardized aqueous extract of Neem (Azadirachta indica) leaves (AIE) has been reported to show both ulcer protective and ulcer healing effects in normal as well as in diabetic rats. To study the mechanism of its ulcer protective/healing actions, effects of AIE (500 mg/kg) was studied on various parameters of offensive acid-pepsin secretion in 4 hr pylorus ligation, pentagastrin (PENTA, 5 μg/kg/hr)- stimulated acid secretion and gastric mucosal proton pump activity and defensive mucin secretion including life span of gastric mucosal cells in rats. AIE was found to inhibit acid-pepsin secretion in 4 hr pylorus ligated rats. Continuous infusion of PENTA significantly increased the acid secretion after 30 to 180 min or in the total 3 hr acid secretion in rat stomach perfusate while, AIE pretreatment significantly decreased them. AIE inhibited the rat gastric mucosal proton pump activity and the effect was comparable with that of omeprazole (OMZ). Further, AIE did not show any effect on mucin secretion though it enhanced life span of mucosal cells as evidenced by a decrease in cell shedding in the gastric juice. Thus, our present data suggest that the ulcer protective activity of AIE may be due to its anti-secretary and proton pump inhibitory activity rather than on defensive mucin secretion. Further, acute as well as sub acute toxicity studies have indicated no mortality with 2.5 g/kg dose of AIE in mice and no significant alterations in body or tissues weight, food and water intake, haematological profile and various liver and kidney function tests in rats when treated for 28 days with 1 g/kg dose of AIE.
Effect of Azadirachta indica leaves extract on acetic acid-induced colitis in rats: Role of antioxidants, free radicals and myeloperoxidase
(2012) R.R. Ghatule; Goel Shalini; M.K. Gautam; A Singh; V.K. Joshi; R.K. Goel
Objective: To evaluate the healing effects of extract of dried leaves of Azadirachta indica (Neem) on acetic acid-induced colitis in rats. Neem tree is known as 'arishtha' in Sanskrit, meaning 'reliever of sicknesses'. Methods: 50% ethanolic extract of Azadirachta indica leaves was administered orally, once daily for 14 days in rats after the induction of colitis with acetic acid and 500 mg/kg dose of extract was found to have an optimal effect against acetic acid-induced colonic damage score, weight and adhesions (Macroscopic). Effect of Azadirachta indica extract was then further studied on various physical (mucous/blood in stool, food and water intake and body weight changes), colonic mucosal damage and inflammation (microscopic), antibacterial and biochemical parameters viz. i) antioxidants (superoxide dismutase, catalase and reduced glutathione) and ii) free radicals (nitric oxide and lipid peroxidation) and myeloperoxidase (acute inflammatory marker) activities in acetic acid-induced colitis. Results: Azadirachta indica extract decreased colonic mucosal damage and inflammation (macroscopic and microscopic), mucous/bloody diarrhea, fecal frequency and increased body weight. Azadirachta indica extract showed intestinal antibacterial activity and enhanced the antioxidants but decreased free radicals and myeloperoxidase activities. Acute toxicity study indicated no mortality or other ANS or CNS related adverse effects even with 5.0 g/kg dose (10 times of effective dose) indicating its safety. Conclusions: Azadirachta indica seemed to be safe and effective in colitis by its predominant effect on promoting antioxidant status and decreasing intestinal bacterial load, free radicals and myeloperoxidase responsible for tissue damage and delayed healing. © 2012 Asian Pacific Tropical Medicine Press.
Effect of Bacopa monniera and Azadirachta indica on gastric ulceration and healing in experimental NIDDM rats
(2004) M. Dorababu; T. Prabha; S. Priyambada; V.K. Agrawal; N.C. Aryya; R.K. Goel
Gastric ulcers were induced in normal/ NIDDM rats by various physical (2 hr cold restraint stress and 4 hr pylorus ligation) and chemical agents (ethanol, 1 ml/200 g, oral, 1 hr before; aspirin, 200 mg/kg, oral, 4 hr) and duodenal ulcers were induced by cysteamine (40 mg/200 g). Ulcer healing activity was studied in gastric ulcers induced by acetic acid (50%) and HCl (0. 6 M). The result indicated that in both, normal and NIDDM rats, B. monniera extract (BME, 20-100 mg/kg) did not show any significant effect on blood glucose level, while A. indica (AIE, 250-1000 mg/kg) significantly decreased it. However, both BME (50 mg/kg) and AIE (500 mg/kg) showed significant anti-ulcer and ulcer-healing activities in normal and NIDDM rats. Further, the present results also indicated that the ulcer protective effects of BME was more pronounced in non-diabetic, while that of AIE was more in NIDDM rats. The anti-ulcer and ulcer-healing activities of BME and AIE may be due to their effects on various mucosal offensive and defensive factors, and correction of blood sugar level by AIE may help to have more ulcer protective effect in NIDDM rats.
Effect of banana powder (Musa sapientum var. paradisiaca) on gastric mucosal shedding
(1987) K. Mukhopadhyaya; D. Bhattacharya; A. Chakraborty; R.K. Goel; A.K. Sanyal
Banana pulp powder (Musa sapientum Linn. var. paradisiaca) was studied for its effects on gastric mucosal resistance. Banana-treated (0.5 g/kg orally, twice daily for 3 days) rats of either sex showed: (i) a significant increase in the [3H]thymidine incorporation into mucosal cell DNA; (ii) a significant increase in the total carbohydrate (sum of total hexoses, hexosamine, fucose and sialic acid) content of gastric mucosa; (iii) a significant decrease in gastric juice DNA and protein; (iv) a significant increase in the total carbohydrates and carbohydrate/protein ratio of gastric juice. Aspirin treatment to rats caused similar effects as banana on the [3H]thymidine incorporation into mucosal cell DNA but showed opposite effects on the other parameters. These results suggest that banana treatment increased and aspirin decreased the gastric mucosal resistance as evidenced by a respective decrease and increase in gastric juice DNA, the latter serving as an index of the rate of mucosal shedding. Increased cellular mucus may be the factor for increased mucosal resistance. The results of the present study tend to confirm that plantain banana powder strengthens mucosal resistance and promotes the healing of ulcers. © 1987.