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Green synthesis of biocompatible gold nanoparticles using Fagopyrum esculentum leaf extract

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Frontiers of Materials Science 2011年第4期5卷 379-387页

作者： Punuri Jayasekhar babu Pragya SHARMa.mohan Chandra KALITA Utpal BORA Biotech Hub Centre for the Environment Indian Institute of Technology Guwahati Guwahati Assam-781039 India Biomaterials and Tissue Engineering Laboratory Department of Biotechnology Indian Institute of Technology Guwahati Guwahati Assam-781039 India Department of Biotechnology Gauhati University Guwahati Assam-781039 India

This report describes the use of ethnolic extract of Fagopyrum esculentum leaves for the synthesis of gold nanoparticles. UV-visible spectroscopy analysis indicated the successful formation of gold nanoparticles. The synthesized nanoparticles were characterized by transmission electron microscopy （TEM）, high resolution TEM （HRTEM） and were found to be spherical, hexagonal and triangular in shape with an average size of 8.3 nm. The crystalline nature of the gold nanoparticles was confirmed from *** diffraction （XRD） and selected-area electron diffraction （SAED） patterns. Fourier transform infrared （FT-IR） and *** X-ray analysis （EDX） suggested the presence of organic biomolecules on the surface of the gold nanoparticles. Cytotoxicity tests against human HeLa, MCF-7 and IMR-32 cancer cell lines revealed that the gold nanoparticles were non-toxic and thus have potential for use in various biomedical applications.

关键词： biomaterials crystal growth electron microscopy Fourier transforminfrared spectroscopy adsorption

Chemoprevention of neuroblastoma: progress and promise beyond uncertainties

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Journal of Cancer Metastasis and Treatment 2023年第1期9卷 307-327页

作者： Natarajan Aravindan mohan Natarajan Dinesh babu Somasundaram Sheeja Aravindan Department of Radiation Oncology University of Oklahoma Health Sciences CenterOklahoma CityOK 73104USA Stephenson Cancer Center Oklahoma CityOK 73104USA Department of Pathology and Laboratory Medicine University of Texas Health Sciences Center at San AntonioSan AntonioTX 78229USA

Neuroblastoma is the most common extracranial solid tumor in children and comprises one-tenth of all childhood cancer *** current clinical therapy for this deadly disease is multimodal,involving an induction phase with alternating regimens of high-dose chemotherapeutic drugs and load reduction surgery;a consolidation phase with more intensive chemotherapy,radiotherapy,and stem cell transplant;and a maintenance phase with immunotherapy and immune-activating cytokine *** such intensive treatment,children with neuroblastoma have unacceptable life quality and survival,warranting preventive measures to regulate the cellular functions that orchestrate tumor progression,therapy resistance,metastasis,and tumor relapse/***,active efforts are underway to identify novel chemopreventive agents,define their mechanism(s)of action,and assess their clinical *** chemoprevention strategies(e.g.,retinoids,difluoromethylornithine)have already been adopted clinically as part of maintenance phase *** agents are in the pipeline,while many others are in preclinical *** we review the classes of chemopreventive agents investigated for neuroblastoma,including cellular events targeted,mode(s)of action,and the level of *** review:(i)highlights the pressing need for new and improved chemopreventive strategies for progressive neuroblastoma;(ii)lists the emerging classes of chemopreventive agents for neuroblastoma;and(iii)recognizes the relevance of targeting dynamically evolving hallmark functions of tumor evolution(e.g.,survival,differentiation,lineage transformation).With recent gains in the understanding of tumor evolution processes and preclinical and clinical efforts,it is our strong opinion that effective chemopreventive strategies for aggressive neuroblastoma are a near reality.

关键词： Neuroblastoma chemoprevention secondary and tertiary chemopreventive phytochemicals retinoids polyphenols terpenes DFMO apoptosis

Adenosine A1 receptor ligands bind toα-synuclein:implications forα-synuclein misfolding andα-synucleinopathy in Parkinson’s disease

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Translational Neurodegeneration 2022年第1期11卷 809-834页

作者： Elisabet Jakova Mohamed Taha Moutaoufik Jeremy S.Lee mohan babu Francisco S.Cayabyab Department of Surgery College of MedicineUniversity of SaskatchewanSaskatoonSKCanada Department of Chemistry and Biochemistry Faculty of ScienceUniversity of ReginaReginaSKCanada Department of Biochemistry Microbiology and ImmunologyCollege of MedicineUniversity of SaskatchewanSaskatoonSKCanada.

Background:Accumulatingα-synuclein(α-syn)aggregates in neurons and glial cells are the staples of many synucleinopathy disorders,such as Parkinson’s disease(PD).Since brain adenosine becomes greatly elevated in ageing brains and chronic adenosine A1 receptor(A1R)stimulation leads to neurodegeneration,we determined whether adenosine or A1R receptor ligands mimic the action of known compounds that promoteα-syn aggregation(e.g.,the amphetamine analogue 2-aminoindan)or inhibitα-syn aggregation(e.g.,Rasagiline metabolite 1-aminoindan).In the present study,we determined whether adenosine,A1R receptor agonist N^(6)-Cyclopentyladenosine(CPA)and antago-nist 8-cyclopentyl-1,3-dipropylxanthine(DPCPX)could directly interact withα-syn to modulateα-syn aggregation and neurodegeneration of dopaminergic neurons in the substantia nigra(SN).Methods:Nanopore analysis and molecular docking were used to test the binding properties of CPA and DPCPX withα-syn in ***-Dawley rats were administered with 7-day intraperitoneal injections of the A1R ligands and 1-and 2-aminoindan,and levels ofα-syn aggregation and neurodegeneration were examined in the SN pars compacta and hippocampal regions using confocal imaging and Western ***:Using nanopore analysis,we showed that the A1R agonists(CPA and adenosine)interacted with the N-terminus ofα-syn,similar to 2-aminoindan,which is expected to promote a“knot”conformation andα-syn *** contrast,the A1R antagonist DPCPX interacted with the N-and C-termini ofα-syn,similar to 1-aminoindan,which is expected to promote a“loop”conformation that preventsα-syn *** docking studies revealed that adenosine,CPA and 2-aminoindan interacted with the hydrophobic core ofα-syn N-terminus,whereas DPCPX and 1-aminoindan showed direct binding to the N-and C-terminal hydrophobic *** imaging and Western blot analyses revealed that chronic treatments with CPA alone or in combination with 2-aminoindan increasedα-syn

关键词： Alpha-synucleinopathy Adenosine A1 receptor N6-cyclopentyladenosine 8-cyclopentyl-1 3-dipropylxanthine 1-aminoindan 2-aminoindan Neuroprotection Neurodegeneration Protein misfolding

Predicting suitable habitat of an invasive weed Parthenium hysterophorus under future climate scenarios in Chitwan Annapurna Landscape,Nepal

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Journal of Mountain Science 2019年第10期16卷 2243-2256页

作者： MAHARJAN Seerjana SHRESTHA Bharat babu JOSHI mohan Dev DEVKOTA Anjana MUNIAPPAN Rangaswamy ADIGA Abhijin JHA Pramod Kumar Central Department of Botany Tribhuvan UniversityKirtipurKathmanduNepal Department of Plant Resources ThapathaliKathmanduNepal IPM Innovation Lab Virginia Tech526Prices Fork RoadBlacksburgVA24061USA Biocomplexity Institute and Initiative University of VirginiaUSA

Chitwan-Annapuma Landscape(CHAL)in central Nepal is known for its rich biodiversity and the landscape is expected to provide corridors for species range shift in response to climate *** assessments have identified biological invasions and other anthropogenic activities as major threats to the biodiversity in the *** of the rapidly spreading Invasive Alien Plant species(IAPs)in the CHAL is Parthenium hysterophorus L.,a neotropical invasive weed of global *** study aimed to investigate the current and future projected suitable habitat of *** in the CHAL using MaxEnt modelling in three'Representative Concentration Pathways'(RCPs 2.6,4.5 and 8.5)corresponding to different greenhouse gases emissiontrajectories for the year 2050 and 2070.A total of 288species occurrence points,six bioclimatic variablesmean diurnal range,isothermality,annual precipitation,precipitation of driest month,precipitation seasonality,precipitation of driest quarter and two topographic variables(aspect and slope)were selected for MaxEnt *** range shift in terms of increase or decline in the suitable habitat areas under the projected scenarios were *** and annual precipitation were the most important variables that explained the current distribution of *** percent of the total area of CHAL was predicted to be suitable habitat for the growth of *** in the current climatic *** gain in the suitable habitat of this noxious weed was found under RCP 4.5 scenario in 2050 and *** there will be a loss in thesuitable habitat under RCP 8.5 scenario in 2050 *** of four physiographic regions present in CHAL,three regions-Siwalik,Middle Mountain and High Mountain have suitable habitat for *** under current climatic *** mountainous region is likely to be affected more than the Siwalik region by further spread of *** in the future under low(R

关键词： Parthenium weed Ecological Niche Model MaxEnt Invasive species Habitat suitability

Two types of uranium mineralization in Gulcheru quartzite:Fracture-controlled in Ambakapalle area and litho-controlled in Tummalapalle area,Cuddapah Basin,Andhra Pradesh,India

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China Geology 2019年第2期2卷 142-156页

作者： Sukanta Goswami Pradeep Kumar Upadhyay Bhaskaran Saravanan V Natarajan mohan babu Verma Atomic Minerals Directorate for Exploration and Research Department of Atomic EnergyBangalore 560072India Atomic Minerals Directorate for Exploration and Research Department of Atomic Energy BegumpetHyderabad 500016India

The Cuddapah Basin in southern India has a potential for uranium mineralization due to some favorable factors such as its temporal, stratigraphic and tectonic settings. Systematic exploration program conducted by the Atomic Minerals Directorate for Exploration and Research (AMD) within the Cuddapah Basin resulting in the recognition of distinct types of uranium mineralization, viz., strata bound type, fracture/shear-controlled type and tabular type. The Gulcheru Formation which is the lowermost unit of the Cuddapah Basin is dominantly arenitic in nature. During the exploration works, a number of uranium anomalies were identified with dimensions ranging from 1 m to 1.5 km. Gulcheru quartzite hosted uranium mineralization is intermittent and inconsistent in nature. The anomalous outcrops are distributed over a strike length of ca. 60 km between Gandi in the SE and Ambakapallein the NW. Presently, two different types of uranium mineralization are characterized on the basis of field observations, mapping and structural interpretation, petro-mineralogy and geochemistry. Although the host rock is same for both types, the mechanism of uranium enrichment is totally different. The Ambakapalle uranium mineralization is controlled by fault zone and associated hydrothermal activity. Whereas, the Tummalapalle uranium mineralization is litho-controlled in nature influenced by suitable four ‘P’ factors, i.e., provenance, porositypermeability, precipitation and preservation. The geochemical characterization of Gulcheru quartzite suggest a passive margin type of provenance setting. Petro-mineralogically the quartz arenite suggests enough textural as well as mineralogical maturity. Ambakapalle quartzite is slightly strained and deformed due to faulting. Analysis of selected samples recorded 0.01% to 0.048% U3O8 and <0.01% ThO2. Petrographic observation revealed that the anomalies were appeared due to secondary uranium minerals occurring as surficial encrustations, fracture filling an

关键词： Uranium mineralization Fracture-controlled mineralization Litho-contralled mineralization Gulcheru quartzite Hydrothermal alteration Andhra Pradesh India

Efficacy of pancreatoscopy for pancreatic duct stones:A systematic review and meta-analysis

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World Journal of Gastroenterology 2020年第34期26卷 5207-5219页

作者： Syed M Saghir Harmeet S Mashiana babu P mohan Banreet S Dhindsa Amaninder Dhaliwal Saurabh Chandan Neil Bhogal Ishfaq Bhat Shailender Singh Douglas G Adler Department of Internal Medicine University of Nevada Las Vegas School of MedicineLas VegasNV 89102United States Division of Gastroenterology and Hepatology University of Nebraska School of MedicineOmahaNE 68198-2000United States Division of Gastroenterology and Hepatology University of Utah HealthSalt Lake CityUT 84132United States

BACKGROUND Pancreatic duct stones can lead to significant abdominal pain for *** oral pancreatoscopy(POP)-guided intracorporal lithotripsy is being increasingly used for the management of main pancreatic duct calculi(PDC)in chronic *** uses two techniques:Electrohydraulic lithotripsy(EHL)and laser lithotripsy(LL).Data on the safety and efficacy are limited for this *** performed a systematic review and meta-analysis with a primary aim to calculate the pooled technical and clinical success rates of *** secondary aim was to assess pooled rates of technical success,clinical success for the two individual techniques,and adverse event *** To perform a systematic review and meta-analysis of POP,EHL and LL for management of PDC in chronic *** We conducted a comprehensive search of multiple electronic databases and conference proceedings including PubMed,EMBASE,Cochrane,Google Scholar and Web of Science databases(from 1999 to October 2019)to identify studies with patient age greater than 17 and any gender that reported on outcomes of POP,EHL and *** primary outcome assessed involved the pooled technical success and clinical success rate of *** secondary outcome included the pooled technical success and clinical success rate for EHL and *** also assessed the pooled rate of adverse events for POP,EHL and LL including a subgroup analysis for the rate of adverse event subtypes for POP:Hemorrhage,post-endoscopic retrograde cholangiopancreatography pancreatitis(PEP),perforation,abdominal pain,fever and *** success was defined as the rate of clearing pancreatic duct stones and clinical success as the improvement in *** model was used for *** between study-specific estimates was calculated using the Cochran Q statistical test and I2 *** bias was ascertained,qualitatively by visual inspection of funnel plot and quantitatively by the Egger ***

关键词： Electrohydraulic shockwave lithotripsy Laser lithotripsy Chronic pancreatitis Calculi Extracorporeal shockwave lithotripsy Endoscopic retrograde cholangiopancreatography Systematic review Meta-analysis Outcome

Spontaneous bacterial empyema in cirrhosis:A systematic review and meta-analysis

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World Journal of Hepatology 2022年第6期14卷 1258-1268页

作者： William Reiche Smit Deliwala Saurabh Chandan babu P mohan Banreet Dhindsa Daryl Ramai Abhilash Perisetti Rajani Rangray Sandeep Mukherjee Department of Internal Medicine CHI Creighton University Medical CenterOmahaNE 68124United States Department of Internal Medicine Michigan State University at Hurley Medical CenterFlintMI 48503United States Division of Gastroenterology and Hepatology CHI Creighton University Medical CenterOmahaNE 68124United States Department of Gastroenterology University of UtahSalt Lake CityUT 84132United States Division of Gastroenterology and Hepatology University of Nebraska Medical CenterOmahaNE 68198United States Division of Gastroenterology Parkview HealthFort WayneIN 46845United States

BACKGROUND Spontaneous bacterial empyema(SBE)occurs when a hepatic hydrothorax becomes infected and runs a course similar to spontaneous bacterial peritonitis(SBP).It remains underdiagnosed as patients with cirrhosis do not routinely undergo diagnostic *** understanding is limited by small cohorts,while studies reporting its association with ascites/SBP are *** To explore the incidence of SBE,to determine its association with ascites,and to summarize what is known regarding treatment and outcomes for patients with *** Major databases were searched until June *** include the incidence of SBE in pleural effusions,SBP in peritoneal fluid,and SBE in patients without ascites within our cohort of patients with *** performed a meta-analysis using a randomeffects model with pooled proportions and 95%confidence intervals(CI).We assessed heterogeneity using I^(2)and classic fail-safe to determine *** Eight studies with 8899 cirrhosis patients were *** median age ranged between 41.2 to 69.7 *** majority of the patients were Child-Pugh B and *** MELD score was 18.6±8.09.A total of 1334 patients had pleural effusions and the pooled incidence of SBE was 15.6%(CI 12.6-19;I^(2)50).Amongst patients diagnosed with SBE,the most common locations included right(202),left(64),and bilateral(8).Amongst our cohort,a total of 2636 patients had ascites with a pooled incidence of SBP of 22.2%(CI 9.9-42.7;I^(2)97.8).The pooled incidence of SBE in patients with cirrhosis but without concomitant ascites was 9.5%(CI 3.6-22.8;I^(2)82.5).CONCLUSION SBE frequently occurs with concurrent ascites/SBP;our results suggest high incidence rates of SBE even in the absence of *** pleura can be an unrecognized nidus and our findings support the use of diagnostic thoracentesis in patients with decompensated cirrhosis after exclusion of other causes of pleural *** should be considered particularly in p

关键词： Spontaneous bacterial peritonitis Spontaneous bacterial peritonitis Postparacentesis circulatory dysfunction Refractory ascites Hepatic hydrothorax

Toxicity of Bacillus thuringiensis Crystal Toxins to Field Populations of Rice Leaf Folder, Cnaphalocrocis medinalis （Guenee） and Establishment of Baseline Susceptibility to Cry1Ab

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Journal of Agricultural Science and Technology(A) 2013年第8期3卷 617-621页

作者： Ramesh babu Veegala Shashi Vemuri Chintalapati Padmavathy Muthugounder mohan Sena Balachandran AINP on Pesticide Residues Acharya N.G. Ranga Agricultural University Raj'endranagar Hyderabad 500030 India Directorate of Rice Research Rajendranagar Hyderabad 500030 India

Eight insecticidal crystal proteins of Bacillus thuringiensis, CrylAa, CrylAb, CrylAc, CrylB, Cry2Aa, CrylC, CrylDa and Cry 1Ea were assessed for toxicity against 1 st instar larvae of rice leaf folder, Cnaphalocrocis medinalis （Guenee） at 48 HAT and 72 HAT. Bioassay results depicted CrylAa was the most toxic （LCso 2.35 ppm） followed by CrylBa （LCso 8,50 ppm） and CrylAb （LCso 8.73 ppm） at 48 HAT, whereas, at 72 HAT CrylAb proved to be highly toxic （LC50 0.50 ppm） followed by CrylAa （LCso 4.07 ppm）, CrylAc （LCso 4,84 ppm） and CrylBa （LCso 6.42 ppm）. Toxins Cry2Aa, CrylCa, CrylDa and CrylEa did not resulted in any mortality at 48 HAT and 72 HAT, respectively. Baseline estimates for CrylAb against 1st instar larvae of C. medinalis sampled from seven geographical locations revealed variation in LC50＇s from 0.37 ppm to LC50 16.25 ppm at 48 HAT and LC50 0.50 ppm to LC50 6.49 ppm 72 HAT, respectively with relative resistance ratios of 44-fold and 13-fold at 48 HAT and 72 HAT over the susceptible population.

关键词： Bacillus thuringiensis rice leaf folder Cnaphalocrocis medinalis (Guenee) rice insecticidal crystal proteins.

Carboxylesterase and Glutathione-S-Transferase （GST＇s） Induced Resistance to Bacillus thuringiensis Toxin CrylAb in Rice Leaf Folder, Cnaphalocrocis medinalis （Guenee） Populations

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Journal of Agricultural Science and Technology(A) 2013年第1期3卷 53-59页

作者： Veegala Ramesh babu Vemuri Shashi Bhushan Chintalapati Padmavathy: Muthugonder mohan SenaMahendran. Balachandran Bellamkonda Ramesh AINP on Pesticide Residues Acharya N.G. Ranga Agricultural University Andhra Pradesh Rajendranagar Hyderabad 500030India Division of Crop Protection Directorate of Rice Research Rajendranagar Andhra Pradesh Hyderabad 500030 India Division of Crop Improvement Directorate of Rice Research Rajendranagar Andhra Pradesh Hyderabad 500030 India

The rice leaf folder （RLF）, Cnaphalocrocis medinalis （Guenee）（lnsecta： Lepidoptera： Pyralidae）, is an important pest, widely distributed in many rice growing areas of Asia. The over-use of broad-spectrum chemical insecticides has been cited as a major cause of outbreaks of C. medinalis as excessive spraying of insecticide disrupts natural biological control insecticides still remain the major control tactics against leaf folder. Carbofuran and fenthion, bendiocarb, acephate, carbosulfan, quinolphos, monocrotophos, phosphamidon and fenvalerate are the common ones used against rice leaf folder. Genetically, modified rice lines expressing B. thuringiensis insecticidal crystal proteins produced are highly tolerant to leidopteran pests. Though economic and environmental benefits of GM crops is well established, the matter of concern is the possibility of target insect pest developing resistance to this B. thuringiensis insecticidal toxins, evident from many laboratory and field experiments against many insect pests. The involvement of GSH S-transferase, carboxylesterase, and microsomal monooxygenase in insecticide resistance has been reported in insecticide-resistant strains of many insect species. Hence, the present study was taken up to monitor for cross resistance between B. thuringiensis cry toxins and synthetic insecticides in larvae of leaf folder as it is mediated by carboxylesterase titre and other enzymes by bioassay for two selected rice leaf folder field populations at the Entomology division of Directorate of Rice Research which showed 2-fold resistance ratio. Qualitative and quantitative changes of carboxylesterase （CarE） and glutathione-s-transferase （GST＇s） were worked out with midguts extracts of the two C. medinalis populations in the presence of a-napthyl acetate and chlorodi-nitro benzene substrates.

关键词： Cnaphalocrocis medinalis carboxylesterase and glutathione-s-transferase isozymes B type esterases.