Peptide alkaloids from Zizyphus sativa bark.
Two new cyclopeptide alkaloids, sativanine-N and sativanine-O were isolated from the stem bark of Zizyphussativa and their structures were established by spectral analysis.
Alkaloids↗
Biomedical subjects
V B Pandey
Publications and source records attributed to V B Pandey.
Individual and combined effect of (+/-)-alpha-hydrastine and (+/-)-beta-hydrastine on spore germination of some fungi.
(+/-)-alpha-Hydrastine and (+/-)-beta-hydrastine were isolated from Corydalis longipes; both exhibited considerable efficacy against spore germination of some saprophytic and phytopathogenic fungi. While (+/-)-alpha-hydrastine was effective against most of the fungi, Helminthosporium echinoclova was least affected even at the highest dose (150 ppm). (+/-)-beta-Hydrastine was equally effective against several fungi. Mixture of both compounds was more effective than each one individually. Helminthosporium species were again the most resistant toward the mixture. The effect of both alkaloids independently on germination and development of E. pisi conidia on excised pea leaves was also shown. After pre-inoculation with (+/-)-alpha-hydrastine, the effect was more pronounced than the addition post-inoculation; maximum inhibition occurred at 200 ppm. (+/-)-beta-Hydrastine also reduced germination of conidia but was less effective than (+/-)-alpha-hydrastine. The number of primary and secondary branches of conidia and number of appressoria were not affected significantly by either compound.
Alkaloids↗
Two plant alkaloids isolated from Corydalis longipes as potential antifungal agents.
The alkaloids N-methylhydrasteine hydroxylactam and 1-methoxyberberine chloride were isolated from Corydalis longipes. Both alkaloids showed high efficacy individually (in concentration of 50-150 ppm) and also in a 1:1 mixture against spore germination of some fungi, viz. Alternaria alternata, A. brassicae, Curvularia maculans, Curvularia sp., Colletotrichum gloeosporioides, Colletotrichum sp., Helminthosporium speciferum, H. pennisetti, Helminthosporium sp., and Ustilago cynodontis. The antifungal effect of single compounds was dose-dependent. If the mutual ratio of the two components in the mixture was changed from 1:1 to a major content of any of the two compounds, the inhibitory effect on spore germination decreased.
Alkaloids↗
Plumieride from Allamanda cathartica as an antidermatophytic agent.
Plumieride has been isolated as an active principle of the leaves of Allamanda cathartica. It showed strong fungitoxicity against some dermatophytes causing dermatomycosis to animals and human beings. It exhibited a noncytotoxic nature against a P(388) mouse leukaemia cell line.
Animals↗
Efficacy of alkaloid (-)-corypalmine against spore germination of some fungi.
Inhibition activity of the alkaloid (-)-corypalmine on spore germination of plant pathogenic and saprophytic fungi (Alternaria solani, A brassicicola, A. brassicae, A. melongenae, Curvularia pallescens, C. lunata, C. maculans, Curvularisa sp., Colletotrichum sp., Helminthosporium speciferum, H. frumentacei, H. pennisetti, Heterosporium sp., Penicillum sp., Ustilago cynodontis) was determined. Spore germination of all the tested fungi was inhibited, Heterosporium sp. and Ustilago cynodontis being the most sensitive (complete inhibition of spore germination was observed at the very low concentration of 200 ppm). Curvularia palliscens, C. maculans and Curvularia sp. were less sensitive; complete inhibition of spore germination occurred at 400 ppm.
Alkaloids↗
Effect of berberine and (+/-)-bicuculline isolated from Corydalis chaerophylla on spore germination of some fungi.
Berberine and (+/-)-bicuculline were isolated from roots and leaves, respectively, of Corydalis chaerophylla. Both were effective in vitro against spore germination of some plant pathogenic fungi (Alternaria brassicicola, A. brassicae, A. cheiranthi, A. melongenae, A. solani, Colletotrichum musae, C. falcatum, Curvularia penniseti, C. lunata, C. maculans, C. pallescens, Curvularia sp., Erysiphe pisi, E. cichoracearum, Erysiphe sp., Fusarium udum, Helminthosporium spiciferum, H. penniseti, H. frumentacei, Heterosporium sp., Oidium erysiphoides and Ustilago cynodontis). Berberine and (+/-)-bicuculline significantly inhibited spore germination of all the fungi at concentrations of 100-1000 ppm. Berberine was effective against all the fungi at all concentrations; most of the fungi did not germinate at 1000 ppm. H. penniseti conidia did not germinate at any concentration of (+/-)-bicuculline. U. cynodontis was the least sensitive fungus at lower concentrations but 800 ppm dose was highly effective.
Antifungal Agents↗
An evaluation of toxicity of Taxus baccata Linn. (Talispatra) in experimental animals.
A toxicological study was performed in albino mice and rat with methanolic extract and isolated alkaloid of Taxus baccata Linn. (family: Taxaceae). LD(50) study showed the higher toxic activity in stem (TXA-1,2,3) as compared with leaf (TXB-1,2,3) extract. As the extract were further fractionated into crude alkaloids and purified by chromatography the toxicity of these fractions were found to be in increasing order as follows: methanolic extract (1) < crude alkaloidal fraction (2) < purified alkaloidal fraction (3). The effects of leaf and stem extract of T. baccata were studied on certain biochemical and haematological parameters of mice and rat after 10, 20 and 30 days of exposure. Among the parameters examined, the exposed animal exhibited significant decrease in total leukocyte count (TLC), lymphocytes and cholesterol level (mg/dl), whereas increase was observed in serum transminases (SGOT, SGPT) and alkaline phosphatase (AP) of TXA-1 and TXB-1 treated groups indicating toxic conditions associated due to liver involvement.
Animals↗
Anti-inflammatory effect of (+)-pinitol.
In the carrageenin-induced paw oedema in rats, (+)-pinitol (2.5-10 mg/kg, i.p.), isolated from Abies pindrow leaves, showed a significant anti-inflammatory effect, the highest dose being comparable to phenylbutazone (100 mg/kg, i.p.).
Animals↗
Cyclopeptide alkaloids from Zizyphus jujuba.
A new cyclopeptide alkaloid, jubanine-C (1), together with known alkaloids scutianine-C (4) and zizyphine-A (5), have been isolated from the stem bark of Zizyphus jujuba and identified by spectral analysis.
Alkaloids↗
Triterpene glycoside from Terminalia arjuna.
A new triterpene glycoside, arjunetoside, together with oleanolic and arjunic acids has been isolated from the root bark of Terminalia arjuna. The structure of arjunetoside has been established as 3-O-beta-D-glucopyranosyl-2alpha,3beta, 19alpha-trihydroxyolean-12-en-28-oic acid, 28-O-beta-D-glucopyranoside by chemical and spectral data.
Chromatography, Thin Layer↗
Eclalbatin, a triterpene saponin from Eclipta alba.
From the whole plant of Eclipta alba, a new triterpene saponin, named eclalbatin, together with alpha-amyrin, ursolic acid and oleanolic acid were isolated. The structure of eclalbatin has been established as 3-O-beta-D-glucopyranosyl-3-beta-hydroxy-olean-12-en-28-oic acid, 28-O-beta-D-arabinopyranoside (1) on the basis of chemical and spectral data.
Asteraceae↗
Flavanone glycosides from Alhagi pseudalhagi.
Two new flavanone glycosides, alhagitin and alhagidin, have been isolated from the whole plant of Alhagi pseudalhagi and their structures established respectively as naringenin 5-methyl ether 4'-glucoside and hesperitin 7-galactosyl(1-->2)[rhamnosyl(1-->6)]glucoside by chemical and spectroscopic methods.
Carbohydrate Conformation↗
An N-formyl cyclopeptide alkaloid from Zizyphus nummularia bark.
A 13-membered N-formylcyclopeptide alkaloid, nummularine-T, has been isolated from the bark of Zizyphus nummularia and its structure established by spectroscopic and chemical methods. It provides the fourth example of a naturally occurring N-formyl cyclopeptide alkaloid.
Alkaloids↗
A chalcone glycoside from Clerodendron phlomidis.
A new chalcone glycoside, together with pectolinarigenin, 7-hydroxyflavone and 7-hydroxyflavanone 7-O-glucoside have been isolated from the flowers and leaves of Clerodendron phlomidis. The structure of the chalcone glycoside has been established as 4,2',4'-trihydroxy-6'-methoxychalcone 4,4'-D-diglucoside by spectroscopic and degradative methods.
Carbohydrate Sequence↗
Antiulcerogenic and anti-inflammatory effects of emodin, isolated from Rhamnus triquerta wall.
Emodin, an anthraquinone derivative, isolated from the whole plant of R. triquerta, in 15 mg/kg dose (ip) exhibited anti-inflammatory activity against carrageenin-induced pedal inflammation in rats. In the same dosage it also showed antiulcer activity against 4 hr pylorus-ligated, aspirin and immobilization stress-induced gastric ulcers in rats. It decreased acid and pepsin output and augmented mucus secretion in terms of total carbohydrate: protein ratio in the gastric juice of aspirin treated pylorus-ligated rats, indicating that the antiulcerogenic effect of emodin may be due to its effect on gastric secretion.
Animals↗
Anti-inflammatory activity of Echinops echinatus.
Anti-inflammatory studies were conducted on an ethanol extract of Echinops echinatus whole plant. The extract effectively inhibited the acute inflammation induced in rats by carrageenan, formaldehyde and adjuvant and the chronic arthritis induced by formaldehyde and adjuvant. The extract was more effective parenterally than orally. The toxicity studies showed reasonable safety warranting further studies.
Administration, Oral↗
Antiinflammatory and antiulcer effects of kaempferol, a flavone, isolated from Rhamnus procumbens.
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Animals↗
Anti-inflammatory studies on Polygonum glabrum.
Anti-inflammatory studies were conducted on a hot water decoction and on an ethanol extract of the stems of Polygonum glabrum. Effective anti-inflammatory activity was demonstrated against acute carrageenan-induced paw oedema, exudate and granuloma formation in the granuloma pouch test, acute and delayed reactions in formaldehyde arthritis, and acute primary and delayed secondary reactions in adjuvant-induced polyarthritis in albino rats. The acute toxicity in albino mice and 1-month studies on subacute toxicity in rats suggested a good margin of safety. The extract was more effective parenterally than by oral administration.
Animals↗