Résumé
Aims: The ethnobotanical herb Hygrophila spinosa T. Anders (Acanthaceae) is native to India and used in traditional ayurvedic medicines for its pharmacologically important phytochemicals. This study aims to isolate and characterize the culturable bacterial endophytes of H. spinosa and evaluate their antimicrobial properties. Place and Duration of Study: The experiments were performed in the Department of Botany, Serampore College, Serampore as well as in the Microbiology Laboratory, Department of Botany, University of Calcutta, Kolkata during 2011 to 2012. Methodology: Bacterial endophytes were isolated from healthy plant tissues following surface sterilization and plating on nutrient agar, glycerol asparagine agar and tryptic soy agar. They were characterized physio-biochemically following standard microbiological and biochemical methods. The endophytes were screened for production of antimicrobial compounds following cross-streak assay against test strains Bacillus subtilis, B. cereus, Escherichia coli, Pseudomonas cepacia, Klebsiella pneumoniae and Staphylococcus aureus on nutrient agar plates. Results: Eleven phenotypically distinguishable bacterial endophytes were isolated from surface sterilized leaf, stem and root tissues and Shannon Weaver diversity index clearly revealed more diverse (0.83) types of endophytes in leaves than in stem (0.48) and root (0.41) tissues. Physio-biochemical features of the isolates clearly indicated distinct variation in their sugar fermentation profiles along with NaCl tolerance. The endophytes produced important enzymes like catalase, amylase, gelatinase, nitrate reductase and lipase. The bacterial isolates belonged to the genera Bacillus, Paenibacillus, Pseudomonas, Ralstonia, Staphylococcus, Micrococcus and Acidomonas. Antibiotic sensitivity profile, however, have indicated that the isolates were mostly resistant to amoxycillin and bacitracin, while they were highly susceptible to tetracycline followed by neomycin and streptomycin. Interestingly, the bacterial endophytes of H. spinosa give a definite stamp on their antimicrobial activity against E. coli and K. pneumoniae followed by S. aureus. Two isolates, Paenibacillus HGS 202 and Acidomonas HGR 302 obtained from stem and root segments respectively showed antimicrobial activity against B. subtilis, B. cereus, E. coli, K. pneumoniae and S. aureus. Conclusion: This study identified 11 bacterial endophytes harbored by the leaves, stem and root of H. spinosa which demonstrated antibacterial activity against Gram-positive as well as Gram-negative bacterial strains. Moreover these endophytic bacterial isolates could be exploited as sources of antibacterial substances.
Résumé
The East Calcutta Wetland (ECW), a Ramsar site in India, acts as the only sink for both city sewages as well as effluents from the surrounding small- scale industries and is alarmingly polluted with heavy metals. The three best edible major carp species rohu (Labeo rohita,), catla (Catla catla,) and mrigala (Cirrhinus mrigala) were undertaken to monitor lactate dehydrogenase (LDH) and malate dehydrogenase (MDH) by cellulose acetate electrophoresis (CAE) to assess the effects of pollutants, if any. Crude tissue extracts were prepared from brain, eye, heart, skeletal muscle and kidney tissue respectively from each type of fish. No differences were not found in MDH of catla from both sites for all tissues analyzed in this study. Rohu also showed similar mobility for all tissues except for heart tissue which was distinctly different in fishes from ECW site than that of its counterpart from non ECW site. On the other hand, MDH of two tissues of mrigala, eye and muscle respectively showed different migration patterns. LDH profiles for all tissues of three fish species from both the sites were consistently similar, only the expression levels of muscle LDH of mrigala and kidney LDH of rohu varied little.
Résumé
OBJECTIVE:To investigate the effects of Shenfu injection on hemodynamecs in patients after the success of cardiopulmonary resuscitation(CPR),and explore the protective effects of which on myocardial injury. METHODS: A total of 178 patients with return of spontaneous circulation in central intensive care unit were randomly assigned to receive 50 mL Shenfu injection iv gtt(group SF) or Mg-contained polarized solution(control group). Hemodynamic indexes were monitored,and serum myocardium enzymes(CK) and cardiac troponin I(CTn I) were determined simultaneously before and after treatment. RESULTS: Patients in both group presented with low blood pressure BP,low cardiac output and myocardial injury after CPR. In the treatment group compared with control group,the hemodynamic indexes were markedly improved,the cardiac pumping function,cardiac output,cardiac index,stroke volume and mean arterial pressure were all significantly increased,while serum CK,CK-MB,LDH,AST and CTn I levels were all decreased obviously after treatment.CONCLUSION: Shenfu injection can markedly improve hemodynamic indexes,enhance the myocardial contractile force,effectively decrease serum myocardium enzymes and repair the damage of myocardial cells caused by the myocardial ischemia and anoxemia after cardiac arrest in patients with return of spontaneous circulation after cardiac arrest.
Résumé
Objective: To investigate the changes of serum myocardium enzyme profile and cardiac troponin I(cTnI) in resuscitated patients,and explore the diagnostic value of cTnI on myocardial injury in patients after cardiopulmonary resuscitation.Methods: Standard cardiopulmonary resuscitation was performed in 82 patients with cardia arrest in emergency ICU.Serum myocardium enzymes and cTnI were determined at the point of cardia arrest and after the return of spontaneous circulation(ROSC).Results: The patients′ plasma cTnI levels was elevated significantly 1 hour after ROSC,and CK?CK-MB?LDH and AST level were increased 2 hours after CPR.The level of the elevated cTnI was responsive to the degree of myocardial injury and the fatality ratio of resuscitated patients.Conclusion: Acute myocardial injuries were present in all resuscitated patients.The level of plasma cTnI could reflect the degree of myocardial injury.