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Arnab Khasnobis,Tapan Seal,J. Rajan Vedasiromoni,Malaya Gupta,Biswapati Mukherjee 한국생약학회 1999 Natural Product Sciences Vol.5 No.3
Tliacora racemosa Colebr. belonging to the family Menispermaceae is the biggest storehouse of diphenyl bisbenzylisoquinoline (DBBI) alkaloids. Exhaustive chemical processing of the root of T. racemosa by the application of modern separation techniques yielded a DBBI alkaloid which was identified as tiliacorine using sophisticated spectroscopic methods (UV, IR, ¹H-NMR, Mass). Tiliacorine potentiated the sleeping time induced by standard hypnotics viz. chlorpromazine (CPZ), pentobarbitone (PB) and diazepam (DZ) in a dose dependent manner. Tiliacorine potentiated the analgesic action of standard analgesic agents viz., morphine and meperidine. It was also found to possess anti-convulsive activity in the strychnine induced convulsion model.
Effects of Tiliacorine on Voluntary Muscle and Blood Pressure
Khasnobis, Arnab,Seal, Tapan,Vedasiromoni, J. Rajan,Gupta, Malaya,Mukherjee, Biswapati The Korean Society of Pharmacognosy 2000 Natural Product Sciences Vol.6 No.1
Tiliacora racemosa Colebr. belongs to the family Menispermaceae, the biggest storehouse of diphenylbisbenzylisoquinoline (DBBI) alkaloids. Exhaustive chemical processing of the root of T. racemosa by the application of modern separation techniques yielded a DBBI alkaloid which was identified as tiliacorine using sophisticated spectroscopic methods $(UV,\;IR,\;^1H-NMR,\;Mass)$. Tiliacorine possesses neuromuscular blocking activity. It produces a dose dependent hypotensive effect in rats and cats, and this effect is blocked by atropine.
Maitra, Suparna,Seal, Tapan,Mallik, Sujit,Khasnobis, Arnab,Nandi, RP,Vedasiromoni, J. Rajan,Mukherjee, Biswapati Kyung Hee Oriental Medicine Research Center 2003 Oriental pharmacy and experimental medicine Vol.3 No.3
Stephania hernandifolia belonging to the family Menispermaceae is the biggest storehouse of diphenylbisbenzylisoquinoline (DBBI) alkaloids. Exhaustive chemical processing of the bulb of S. hernandifolia by the application of modern separation techniques yielded a DBBI alkaloid which was identified as cycleanine using spectroscopic methods (UV, IR, $^1HNMR$. $^{13}CNMR$, Mass). Cycleanine showed significant anti-inflammatory activity against carrageenin induced paw oedema, comparable to that produced by diclofenac sodium, used as standard drug. It exhibited potent analgesic effects against chemical and thermal noxious stimuli. It was also found to possess anticonvulsive activity in the strychnine induced convulsion model.
Rico, Cyren M.,Lee, Sang Chul,Rubenecia, Rosnah,Mukherjee, Arnab,Hong, Jie,Peralta-Videa, Jose R.,Gardea-Torresdey, Jorge L. American Chemical Society 2014 Journal of agricultural and food chemistry Vol.62 No.40
<P>The implications of engineered nanomaterials on crop productivity and food quality are not yet well understood. The impact of cerium oxide nanoparticles (<I>n</I>CeO<SUB>2</SUB>) on growth and yield attributes and nutritional composition in wheat (<I>Triticum aestivum</I> L.) was examined. Wheat was cultivated to grain production in soil amended with 0, 125, 250, and 500 mg of <I>n</I>CeO<SUB>2</SUB>/kg (control, <I>n</I>CeO<SUB>2</SUB>-L, <I>n</I>CeO<SUB>2</SUB>-M, and <I>n</I>CeO<SUB>2</SUB>-H, respectively). At harvest, grains and tissues were analyzed for mineral, fatty acid, and amino acid content. Results showed that, relative to the control, <I>n</I>CeO<SUB>2</SUB>-H improved plant growth, shoot biomass, and grain yield by 9.0%, 12.7%, and 36.6%, respectively. Ce accumulation in roots increased at increased <I>n</I>CeO<SUB>2</SUB> concentration but did not change across treatments in leaves, hull, and grains, indicating a lack of Ce transport to the above-ground tissues. <I>n</I>CeO<SUB>2</SUB> modified S and Mn storage in grains. <I>n</I>CeO<SUB>2</SUB>-L modified the amino acid composition and increased linolenic acid by up to 6.17% but decreased linoleic acid by up to 1.63%, compared to the other treatments. The findings suggest the potential of nanoceria to modify crop physiology and food quality with unknown consequences for living organisms.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jafcau/2014/jafcau.2014.62.issue-40/jf503526r/production/images/medium/jf-2014-03526r_0002.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jf503526r'>ACS Electronic Supporting Info</A></P>
Effect of Tilliacorine on Haematological and Biochemical Parameters
A. Roychowdhuri,J. Rajan Vedasiromoni,Malaya Gupta,S. K. Mitra,Biswapati Mukherjee,Arnab Khasnobis,Tapan Seal 한국생약학회 2000 Natural Product Sciences Vol.6 No.3
Tiliacora racemosa Colebr. belonging to the family Menispermaceae, is the biggest storehouse of diphenyl bisbenzylisoquinoline (DBBI) alkaloids. Exhaustive chemical processing of the root of T. racemosa by the application of modern separation techniques yielded a DBBI alkaloid which was identified as tiliacorine using sophisticated spectroscopic methods (UV, IR, ¹H-NMR, MS). Haematological study with tiliacorine proved that there was no abnormal haematological results in comparison with the normal values. Chronic toxicity study with tiliacorine revealed that the alkaloid is devoid of any hepatotoxic and nephrotoxic action.
Arresting an Unusual Amide Tautomer Using Divalent Cations
Kashid, Somnath M.,Singh, Reman K.,Kwon, Hyejin,Kim, Yung Sam,Mukherjee, Arnab,Bagchi, Sayan American Chemical Society 2019 The Journal of physical chemistry B Vol.123 No.40
<P>Ion-specific effects on peptides and proteins are key to biomolecular structure and stability. The subtle roles of the cations are far less understood, compared to the pronounced effects of the anions on proteins. Most importantly, divalent cations such as Ca<SUP>2+</SUP> and Mg<SUP>2+</SUP> are crucial to several biological functions. Herein, we demonstrate that an amide-iminolate equilibrium is triggered by the binding of the divalent cations to the amide oxygen in aqueous solution. The excellent agreement between the experimental and theoretical results confirms the arrest of an unusual amide tautomer by the divalent cations, which is a rarely known phenomenon that might open up an array of applications in chemistry and biology.</P> [FIG OMISSION]</BR>