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Nivedha M, Harish S, Angappan K, Karthikeyan G, Kumar KK, Murugan M, Infant Richard J. Profiling of Groundnut bud necrosis orthotospovirus-responsive microRNA and their targets in tomato based on deep sequencing. J Virol Methods 2024; 327:114924. [PMID: 38574773 DOI: 10.1016/j.jviromet.2024.114924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/26/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
Tomato, an extensively cultivated vegetable crop produces miRNAs in response to infection with Groundnut bud necrosis orthotospovirus, a viral pathogen causing significant economic losses. High-throughput miRNA sequencing was performed on tomato leaves inoculated with GBNV and mock-inoculated leaves as controls. Analysis revealed 73 known miRNAs belonging to 24 miRNA families, with variable expression levels. Interestingly, 39 miRNAs were upregulated, and 34 were downregulated in response to GBNV infection. Stem-loop quantitative reverse transcription PCR validated the differential expression of selected miRNAs. Additionally, 30 miRNA encoded proteins were identified to be involved in disease resistance and susceptibility. The miRNA-target interactions were found to play significant roles in cellular and metabolic activities, as well as modulating signaling pathways during the plant-virus interaction. The findings shed light on the intricate regulatory network of miRNAs in tomato response to viral infection and may contribute to developing strategies for improving crop protection against viral diseases.
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Affiliation(s)
- M Nivedha
- Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
| | - S Harish
- Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India.
| | - K Angappan
- Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
| | - G Karthikeyan
- Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
| | - K K Kumar
- Department of Plant Biotechnology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
| | - M Murugan
- Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
| | - J Infant Richard
- Department of Plant Molecular Biology and Bioinformatics, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
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2
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Chandy M, Wei TTT, Nishiga M, Zhang A, Kumar KK, Thomas D, Manhas A, Rhee S, Justesen JM, Chen IY, Wo HT, Yang JY, Khanamiri S, Seidl F, Burns N, Liu C, Sayed N, Shie JJ, Yeh CF, YANG KC, Lau E, Lynch K, Rivas M, Kobilka B, Wu JC. Abstract P3005: Cannabinoid Receptor 1 Antagonist Genistein Attenuates Marijuana-Induced Vascular Inflammation. Circ Res 2022. [DOI: 10.1161/res.131.suppl_1.p3005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Epidemiological studies reveal that marijuana increases the risk of cardiovascular disease (CVD); however, little is known about the mechanism. Δ
9
-tetrahydrocannabinol (Δ
9
-THC), the psychoactive component of marijuana, binds cannabinoid receptor 1 (CB1/CNR1) in the vasculature and is implicated in CVD. A UK Biobank analysis found that cannabis is an independent risk factor for CVD. We found that marijuana smoking activated inflammatory cytokines implicated in CVD.
In silico
virtual screening identified genistein, a soybean isoflavone, as a putative CB1 antagonist. Human-induced pluripotent stem cell-derived endothelial cells (hiPSC-ECs) were used to model Δ
9
-THC induced inflammation and oxidative stress via NF-κB signaling. Knockdown of the CB1 receptor with siRNA, CRISPR interference (CRISPRi), and genistein attenuate the effects of Δ
9
-THC. In mice, genistein blocked Δ
9
-THC-induced endothelial dysfunction in wire myograph, reduced atherosclerotic plaque, and had minimal penetration of the central nervous system (CNS). Genistein is a peripherally restricted CB1 antagonist that attenuates Δ
9
-THC-induced atherosclerosis.
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3
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Ehsan M, Kumar A, Mortensen JS, Du Y, Hariharan P, Kumar KK, Ha B, Byrne B, Guan L, Kobilka BK, Loland CJ, Chae PS. Self-Assembly Behaviors of a Penta-Phenylene Maltoside and Its Application for Membrane Protein Study. Chem Asian J 2019; 14:1926-1931. [PMID: 30969484 PMCID: PMC7239035 DOI: 10.1002/asia.201900224] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/22/2019] [Indexed: 01/07/2023]
Abstract
We prepared an amphiphile with a penta-phenylene lipophilic group and a branched trimaltoside head group. This new agent, designated penta-phenylene maltoside (PPM), showed a marked tendency to self-assembly into micelles via strong aromatic-aromatic interactions in aqueous media, as evidenced by 1 H NMR spectroscopy and fluorescence studies. When utilized for membrane protein studies, this new agent was superior to DDM, a gold standard conventional detergent, in stabilizing multiple proteins long term. The ability of this agent to form aromatic-aromatic interactions is likely responsible for enhanced protein stabilization when associated with a target membrane protein.
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Affiliation(s)
- Muhammad Ehsan
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
- Current address: Department of Chemistry, Mirpur University of Science&Technology (MUST), Mirpur-, 10250 (AJK), Pakistan
| | - Ashwani Kumar
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
| | - Jonas S Mortensen
- Department of Neuroscience, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Yang Du
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock, TX, 79430, USA
| | - Kaavya K Kumar
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Betty Ha
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Bernadette Byrne
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center Lubbock, TX, 79430, USA
| | - Brian K Kobilka
- Molecular and Cellular Physiology, Stanford University, Stanford, CA, 94305, USA
| | - Claus J Loland
- Department of Neuroscience, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Pil Seok Chae
- Department of Bionanotechnology, Hanyang University, Ansan, 15588, Korea
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4
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Bae HE, Du Y, Hariharan P, Mortensen JS, Kumar KK, Ha B, Das M, Lee HS, Loland CJ, Guan L, Kobilka BK, Chae PS. Asymmetric maltose neopentyl glycol amphiphiles for a membrane protein study: effect of detergent asymmetricity on protein stability. Chem Sci 2018; 10:1107-1116. [PMID: 30774908 PMCID: PMC6346398 DOI: 10.1039/c8sc02560f] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 11/04/2018] [Indexed: 12/21/2022] Open
Abstract
An asymmetric MNG, MNG-8,12, provided enhanced stability to human G protein-coupled receptors (GPCRs) compared to the symmetric MNG, MNG-3.
Maintaining protein stability in an aqueous solution is a prerequisite for protein structural and functional studies, but conventional detergents have increasingly showed limited ability to maintain protein integrity. A representative novel agent, maltose neopentyl glycol-3 (MNG-3), has recently substantially contributed to membrane protein structural studies. Motivated by the popular use of this novel agent, we prepared asymmetric versions of MNG-3 and evaluated these agents with several membrane proteins including two G protein-coupled receptors in this study. We found that some new MNGs were significantly more effective than MNG-3 at preserving protein integrity in the long term, suggesting that these asymmetric MNGs will find a wide use in membrane protein studies. In addition, this is the first study addressing the favorable effect of detergent asymmetric nature on membrane protein stability.
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Affiliation(s)
- Hyoung Eun Bae
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 Korea .
| | - Yang Du
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Parameswaran Hariharan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center Lubbock , TX 79430 , USA .
| | - Jonas S Mortensen
- Department of Neuroscience , University of Copenhagen , DK-2200 Copenhagen , Denmark .
| | - Kaavya K Kumar
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Betty Ha
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Manabendra Das
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 Korea .
| | - Hyun Sung Lee
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 Korea .
| | - Claus J Loland
- Department of Neuroscience , University of Copenhagen , DK-2200 Copenhagen , Denmark .
| | - Lan Guan
- Department of Cell Physiology and Molecular Biophysics , Center for Membrane Protein Research , School of Medicine , Texas Tech University Health Sciences Center Lubbock , TX 79430 , USA .
| | - Brian K Kobilka
- Molecular and Cellular Physiology , Stanford , CA 94305 , USA .
| | - Pil Seok Chae
- Department of Bionanotechnology , Hanyang University , Ansan , 15588 Korea .
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5
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Kumar KK, Ewing T, Vaughn BV, Roth HL, Fan Z. 1225 A Case of Phantom Restless Legs Syndrome in a Patient with Unilateral Amputation - Response to Pregabalin. Sleep 2017. [DOI: 10.1093/sleepj/zsx052.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Milekic MH, Xin Y, O'Donnell A, Kumar KK, Bradley-Moore M, Malaspina D, Moore H, Brunner D, Ge Y, Edwards J, Paul S, Haghighi FG, Gingrich JA. Age-related sperm DNA methylation changes are transmitted to offspring and associated with abnormal behavior and dysregulated gene expression. Mol Psychiatry 2015; 20:995-1001. [PMID: 25092244 DOI: 10.1038/mp.2014.84] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 05/14/2014] [Accepted: 06/17/2014] [Indexed: 12/15/2022]
Abstract
Advanced paternal age (APA) has been shown to be a significant risk factor in the offspring for neurodevelopmental psychiatric disorders, such as schizophrenia and autism spectrum disorders. During aging, de novo mutations accumulate in the male germline and are frequently transmitted to the offspring with deleterious effects. In addition, DNA methylation during spermatogenesis is an active process, which is susceptible to errors that can be propagated to subsequent generations. Here we test the hypothesis that the integrity of germline DNA methylation is compromised during the aging process. A genome-wide DNA methylation screen comparing sperm from young and old mice revealed a significant loss of methylation in the older mice in regions associated with transcriptional regulation. The offspring of older fathers had reduced exploratory and startle behaviors and exhibited similar brain DNA methylation abnormalities as observed in the paternal sperm. Offspring from old fathers also had transcriptional dysregulation of developmental genes implicated in autism and schizophrenia. Our findings demonstrate that DNA methylation abnormalities arising in the sperm of old fathers are a plausible mechanism to explain some of the risks that APA poses to resulting offspring.
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Affiliation(s)
- M H Milekic
- Department of Psychiatry, Columbia University and The New York State Psychiatric Institute, New York, NY, USA
| | - Y Xin
- Department of Psychiatry, Columbia University and The New York State Psychiatric Institute, New York, NY, USA
| | - A O'Donnell
- Department of Genetics and Development, Columbia University, New York, NY, USA
| | - K K Kumar
- Department of Psychiatry, Columbia University and The New York State Psychiatric Institute, New York, NY, USA
| | - M Bradley-Moore
- Department of Psychiatry, Columbia University and The New York State Psychiatric Institute, New York, NY, USA
| | - D Malaspina
- 1] Department of Psychiatry, New York University, New York, NY, USA [2] Department of Psychiatry, New York University, and The NY OMH Creedmoor Psychiatric Center, New York, NY, USA
| | - H Moore
- Department of Psychiatry, Columbia University and The New York State Psychiatric Institute, New York, NY, USA
| | - D Brunner
- 1] Department of Psychiatry, Columbia University and The New York State Psychiatric Institute, New York, NY, USA [2] PsychoGenics, New York, NY, USA
| | - Y Ge
- Department of Neurology, Mount Sinai School of Medicine, New York, NY, USA
| | - J Edwards
- Center for Pharmacogenomics, Department of Medicine, Washington University School of Medicine, St Louis, MO, USA
| | - S Paul
- Helen & Robert Appel Institute for Alzheimer's Research, Mind and Brain Institute, Weill Cornell Medical School, New York, NY, USA
| | - F G Haghighi
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - J A Gingrich
- Department of Psychiatry, Columbia University and The New York State Psychiatric Institute, New York, NY, USA
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7
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Prathima PT, Raveendran M, Kumar KK, Rahul PR, Kumar VG, Viswanathan R, Sundar AR, Malathi P, Sudhakar D, Balasubramaniam P. Differential regulation of defense-related gene expression in response to red rot pathogen Colletotrichum falcatum infection in sugarcane. Appl Biochem Biotechnol 2013; 171:488-503. [PMID: 23861092 DOI: 10.1007/s12010-013-0346-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Accepted: 06/17/2013] [Indexed: 02/08/2023]
Abstract
Red rot is a serious disease of sugarcane caused by the fungus Colletotrichum falcatum imposing a considerable economic loss annually in all sugarcane-producing countries. In this study, we analyzed the early resistance response of sugarcane to red rot fungus by comparing the differences between control and inoculated stalk tissues. Differential display reverse transcription polymerase chain reaction (DD-RT-PCR) was employed to identify altered expression of genes in disease-resistant cv Co 93009, in response to pathogen infection. DD-RT-PCR identified 300 differentially expressed transcripts of which 112 were selected for further analysis. Cloning and sequence analysis of the isolated cDNA fragments resulted in functional categorization of these clones into five categories, of which the defense/stress/signaling group was the largest, with clones homologous to genes known to be actively involved in various pathogenesis-related functions in plant species. This group showed overexpression of several transcripts related to ethylene-mediated and jasmonic acid pathway of plant defense mechanisms. Of the 112 expressed sequence tags, validation of expression was carried out for five important genes whose role in plant defense mechanisms is well established. This is the first report of Colletotrichum-mediated gene regulation in sugarcane which has provided a set of candidate genes for detailed molecular dissection of signaling and defense responses in tropical sugarcane during the onset of red rot resistance.
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Affiliation(s)
- P T Prathima
- Sugarcane Breeding Institute, Coimbatore-7, India.
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8
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Kumar KK, Nagoji KEV, Nadh RV. A Validated RP-HPLC Method for the Estimation of Lapatinib in Tablet Dosage form using Gemcitabine Hydrochloride as an Internal Standard. Indian J Pharm Sci 2013; 74:580-3. [PMID: 23798787 PMCID: PMC3687931 DOI: 10.4103/0250-474x.110621] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2011] [Revised: 12/08/2012] [Accepted: 12/10/2012] [Indexed: 01/06/2023] Open
Abstract
A simple, selective, rapid, precise and economical reverse-phase high-performance liquid chromatography method has been developed for the determination of lapatinib in tablet using gemcitabine hydrochloride as an internal standard. Chromatography was carried out on an ODS C-18 RP column (4.6 mm i.d. ×250 mm) using a mixture of acetonitrile and water (50:50 v/v) as the mobile phase at a flow rate of 1.0 ml/min. The drug was monitored at 232 nm. The retention times for lapatinib and gemcitabine hydrochloride were found to be 4.25±0.05 and 6.10±0.05 min, respectively. The method produced linear responses in the concentration range of 2-60 μg/ml of lapatinib. The limit of detection and limit of quantitation were 0.265 and 0.884 μg/ml, respectively.
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Affiliation(s)
- K K Kumar
- Department of Chemistry, Nalanda Degree and P.G. College, Bunder Road, Vijayawada-520 010, India
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Lalhruaitluanga H, Jayaram K, Prasad MNV, Kumar KK. Lead(II) adsorption from aqueous solutions by raw and activated charcoals of Melocanna baccifera Roxburgh (bamboo)--a comparative study. J Hazard Mater 2010; 175:311-318. [PMID: 19883973 DOI: 10.1016/j.jhazmat.2009.10.005] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 10/01/2009] [Accepted: 10/01/2009] [Indexed: 05/28/2023]
Abstract
Melocanna baccifera (Poaceae) is the most abundant and economically important non-timber product in state of Mizoram, India. The communities of the region use this potential resource in many ways, charcoal production is one of them. Bamboo charcoal has application in food, pharmaceutical and chemical industries. Activated charcoal was prepared from M. baccifera charcoal by chemical pretreatment in order to make better use of this abundant biomass material. Batch experiments were conducted under varying range of pH (2.0-6.0), contact time (15-360 min) and metal ion concentrations (50-90 mg L(-1)). The optimum conditions for lead biosorption are almost same for M. baccifera raw charcoal (MBRC) and M. baccifera activated charcoal (MBAC)-pH 5.0, contact time 120 min, adsorption capacity q(max) 10.66 mg g(-1) and 53.76 mg g(-1), respectively. However, the biomass of MBAC was found to be more suitable than MBRC for the development of an efficient adsorbent for the removal of lead(II) from aqueous solutions. FTIR analysis revealed that -OH, C-H bending, C=O stretching vibration and carbonyl functional groups were mainly responsible for Pb(II) biosorption. Thus, this study demonstrated that both the charcoal biomass could be used as adsorbents for the treatment of Pb(II) from aqueous solution.
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Affiliation(s)
- H Lalhruaitluanga
- Department of Plant Sciences, University of Hyderabad, Hyderabad 500046, India
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10
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Venkatesan S, Raja JAJ, Maruthasalam S, Kumar KK, Ramanathan A, Sudhakar D, Balasubramanian P. Transgenic resistance by N gene of a Peanut bud necrosis virus isolate of characteristic phylogeny. Virus Genes 2009; 38:445-54. [PMID: 19255836 DOI: 10.1007/s11262-009-0342-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2008] [Accepted: 02/17/2009] [Indexed: 11/27/2022]
Abstract
The nucleocapsid protein (N) gene of a Tospovirus devastating tomato crop in the south Indian state of Tamil Nadu was cloned and characterized. The high identity of the cloned sequence to a Peanut bud necrosis virus (PBNV) tomato isolate (97.8/99.6% nucleotide/amino acid) and a PBNV peanut isolate (94.4/96.3% nucleotide/amino acid) identified the Tospovirus as an isolate of PBNV, designated PBNV Coimbatore tomato (PBNV CT) isolate. Phylogenetic analysis of PBNV CT N gene provided useful insights into the movement and evolution of PBNV within Indian Territory. The characteristic phylogeny of PBNV CT N gene implied its potential to be an efficient transgene to confer effective PBNV resistance on crop plants. The efficacy of PBNV CT N gene in conferring PBNV resistance was studied by generating tobacco (Nicotiana tabacum L. cv Wisconsin) lines transgenic to the sense or antisense version of the gene. Several transgenic lines showed transgenic mRNA and/or protein accumulation, ranging from very high to undetectable levels, accompanied by different degrees of PBNV resistance. The undetectable or very low levels of transgene transcripts in certain PBNV-resistant sense or antisense N gene transgenic lines suggested RNA-mediated resistance by post-transcriptional gene silencing (PTGS) mechanism. However, PBNV resistance of certain transgenic lines with high levels of N gene transcripts was suggestive of possible operation of RNA-mediated non-PTGS mechanism(s) of resistance in those lines. Moreover, the high levels of N protein in certain PBNV-resistant sense N gene transgenic lines suggested protein-mediated resistance. The results predict the potential of PBNV CT N gene to confer effective PBNV resistance on tomato and other economically important crops.
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Affiliation(s)
- S Venkatesan
- Rice Transformation Laboratory, Department of Plant Molecular Biology and Biotechnology, Center for Plant Molecular Biology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
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11
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Maruthasalam S, Kalpana K, Kumar KK, Loganathan M, Poovannan K, Raja JAJ, Kokiladevi E, Samiyappan R, Sudhakar D, Balasubramanian P. Pyramiding transgenic resistance in elite indica rice cultivars against the sheath blight and bacterial blight. Plant Cell Rep 2007; 26:791-804. [PMID: 17221225 DOI: 10.1007/s00299-006-0292-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Revised: 12/05/2006] [Accepted: 12/14/2006] [Indexed: 05/04/2023]
Abstract
Elite indica rice cultivars were cotransformed with genes expressing a rice chitinase (chi11) and a thaumatin-like protein (tlp) conferring resistance to fungal pathogens and a serine-threonine kinase (Xa21) conferring bacterial blight resistance, through particle bombardment, with a view to pyramiding sheath blight and bacterial blight resistance. Molecular analyses of putative transgenic lines by polymerase chain reaction, Southern Blot hybridization, and Western Blotting revealed stable integration and expression of the transgenes in a few independent transgenic lines. Progeny analyses showed the stable inheritance of transgenes to their progeny. Coexpression of chitinase and thaumatin-like protein in the progenies of a transgenic Pusa Basmati1 line revealed an enhanced resistance to the sheath blight pathogen, Rhizoctonia solani, as compared to that in the lines expressing the individual genes. A transgenic Pusa Basmati1 line pyramided with chi11, tlp, and Xa21 showed an enhanced resistance to both sheath blight and bacterial blight.
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Affiliation(s)
- S Maruthasalam
- Rice Transformation Laboratory, Center for Plant Molecular Biology, Department of Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore 641003, Tamil Nadu, India
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12
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Kumar KK, Singh I, Goel S. A new bracket-positioning gauge. J Clin Orthod 2001; 35:154-5. [PMID: 11314594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Affiliation(s)
- K K Kumar
- Department of Orthodontics and Dentofacial Orthopedics, P.M. Nadagouda Memorial Dental College and Hospital, Bagalkot 587101, India
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13
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Chisholm D, Sekar K, Kumar KK, Saeed K, James S, Mubbashar M, Murthy RS. Integration of mental health care into primary care. Demonstration cost-outcome study in India and Pakistan. Br J Psychiatry 2000; 176:581-8. [PMID: 10974966 DOI: 10.1192/bjp.176.6.581] [Citation(s) in RCA: 122] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Targeting resources on cost-effective care strategies is important for the global mental health burden. AIMS To demonstrate cost-outcome methods in the evaluation of mental health care programmes in low-income countries. METHOD Four rural populations were screened for psychiatric morbidity. Individuals with a diagnosed common mental disorder were invited to seek treatment, and assessed prospectively on symptoms, disability, quality of life and resource use. RESULTS Between 12% and 39% of the four screened populations had a diagnosable common mental disorder. In three of the four localities there were improvements over time in symptoms, disability and quality of life, while total economic costs were reduced. CONCLUSION Economic analysis of mental health care in low-income countries is feasible and practicable. Our assessment of the cost-effectiveness of integrating mental health into primary care was confounded by the naturalistic study design and the low proportion of subjects using government primary health care services.
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Affiliation(s)
- D Chisholm
- Centre for the Economics of Mental Health, Institute of Psychiatry, King's College London
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14
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Lakshmi G, Reddy RP, Kumar KK, Bhavani NV, Dayanand M. Study of the safety, immunogenicity and seroconversion of a hepatitis-B vaccine in malnourished children of India. Vaccine 2000; 18:2009-14. [PMID: 10706962 DOI: 10.1016/s0264-410x(99)00529-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Sixty rural children who were seronegative for HBV markers received three doses of 10 microgram of a new Hepatitis-B vaccine, Revac-B (1 ml of vaccine contains 20 microgram recombinant surface antigen) that was formulated from hepatitis-B surface antigen expressed in a recombinant strain of Saccharomyces cerevisiae. Vaccines were administered on a 0, 30 and 60-day schedule. Levels of anti-HBs titres were determined on the 30th, 60th and 90th days following the initial injection. None of the participants in the trial had serious adverse reactions and the frequencies of minor side effects were minimal. No clinically important adverse effects which could be considered as directly related to the vaccination were recorded. The volunteers showed a very good immune response and were seroprotected on the 30th day after the first dose of vaccination. The present study revealed that the new vaccine, Revac-B is highly immunogenic and is well tolerated.
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Affiliation(s)
- G Lakshmi
- Department of Paediatrics, Unit-III, Niloufer Hospital, Hyderabad, India.
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15
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Abstract
Analysis of the 140-year historical record suggests that the inverse relationship between the El Nino-Southern Oscillation (ENSO) and the Indian summer monsoon (weak monsoon arising from warm ENSO event) has broken down in recent decades. Two possible reasons emerge from the analyses. A southeastward shift in the Walker circulation anomalies associated with ENSO events may lead to a reduced subsidence over the Indian region, thus favoring normal monsoon conditions. Additionally, increased surface temperatures over Eurasia in winter and spring, which are a part of the midlatitude continental warming trend, may favor the enhanced land-ocean thermal gradient conducive to a strong monsoon. These observations raise the possibility that the Eurasian warming in recent decades helps to sustain the monsoon rainfall at a normal level despite strong ENSO events.
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Affiliation(s)
- KK Kumar
- International Research Institute (IRI) for Climate Prediction, Lamont-Doherty Earth Observatory (LDEO) of Columbia University, Post Office Box 1000, Route 9W, Palisades, NY 10964-8000, USA. LDEO of Columbia University, Post Office Box 1000, Rou
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16
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Kotha A, Raman RC, Ponrathnam S, Kumar KK, Shewale JG. Beaded reactive polymers. 3. Effect of triacrylates as crosslinkers on the physical properties of glycidyl methacrylate copolymers and immobilization of penicillin G acylase. Appl Biochem Biotechnol 1998; 74:191-203. [PMID: 10052115 DOI: 10.1007/bf02825965] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Various glycidyl methacrylate (GMA) copolymers were synthesized by suspension polymerization, using pentaerythritol triacrylate (PETA), trimethylolpropane triacrylate (TMPTA), and trimethylolpropane trimethacrylate (TRIM) as crosslinking comonomers. These copolymers were evaluated for the immobilization of penicillin G acylase. Broad pore-size distribution that was observed was in the range 5-300 nm. Both surface area and pore volume increased with increase in the mole fraction of crosslinking comonomer (increasing crosslink density). The pore volume of the copolymers was more than doubled by including lauryl alcohol as porogen. Binding of penicillin G acylase (PGA) was quantitative on highly crosslinked copolymers. The expression of bound PGA was better on the relatively more hydrophilic GMA-TMPTA and GMA-PETA copolymer supports compared to the GMA-TRIM copolymers. Among the different copolymers studied, GMA-TMPTA copolymer 7411 exhibited highest activity of immobilized penicillin G acylase (167.4 IU/g) with 35.1% expression.
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Affiliation(s)
- A Kotha
- Chemical Engineering Division, National Chemical Laboratory, India
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17
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Kumar KK, Deshpande BS, Ambedkar SS, Shewale JG. Evaluation of product analogues for purification of penicillinase by affinity chromatography. Hindustan Antibiot Bull 1996; 38:37-40. [PMID: 9676043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Among different matrices prepared, ampicilloic acid-polymer matrix offered 86.7% adsorption, 95% elution and 82.4% overall recovery of penicillinase. The structure of both the side chain and penicilloic or cephalosporoic acid moieties contribute to the affinity interactions.
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Affiliation(s)
- K K Kumar
- Research and Development, Hindustan Antibiotics Ltd., Pimpri, Pune, India
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18
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Kumar KK, Srivastava R, Sinha VB, Michalski J, Kaper JB, Srivastava BS. recA mutations reduce adherence and colonization by classical and El Tor strains of Vibrio cholerae. Microbiology (Reading) 1994; 140 ( Pt 5):1217-22. [PMID: 8025688 DOI: 10.1099/13500872-140-5-1217] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Two recA mutants of Vibrio cholerae (classical and El Tor biotypes) were constructed by disruption of the wild-type recA gene with mutated recA sequences of V. cholerae cloned in the suicide vector pGP704. Mutants defective in the recA gene were compared with their respective RecA+ parent strains with regard to their adherence to isolated rabbit intestine and colonization of intestine of infant mice. The recA mutation in V. cholerae was found to diminish adherence and markedly affected colonization.
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Affiliation(s)
- K K Kumar
- Division of Microbial Genetics, Central Drug Research Institute, Lucknow, India
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19
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Kumar KK, Sudhakaran V, Deshpande BS, Ambedkar SS, Shewale JG. Cephalosporin acylases: enzyme production, structure and application in the production of 7-ACA. Hindustan Antibiot Bull 1993; 35:111-25. [PMID: 8181946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Cephalosporin acylases have application in the production of 7-aminocephalosporanic acid which forms a key raw material for the preparation of semisynthetic injectable cephalosporins. The enzymes are of industrial importance and hyperproducing genetically engineered strains have been constructed. Different aspects of these enzymes such as subunit structure, post translational modification, primary structure, substrate specificity and their importance in pharmaceutical industry are discussed.
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Affiliation(s)
- K K Kumar
- Research and Development, Hindustan Antibiotics Limited, Pimpri, Pune, India
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20
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Kumar KK, Deshpande BS, Ambedkar SS. Production of extracellular acidic lipase by Rhizopus arrhizus as a function of culture conditions. Hindustan Antibiot Bull 1993; 35:33-42. [PMID: 8181953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Thermophilic strain of Rhizopus arrhizus accumulates an acidic lipase in culture fluid when grown in a medium containing ground nut oil, milk powder and inorganic salts. Addition of 2.0% ground nut oil yielded the highest productivity of enzyme. Soyabean meal and arabinose were found to be the best nitrogen and carbon sources for enzyme production respectively. Addition of metal ions such as MnCl2, SnCl2 and CaCl2 increased the enzyme productivity by 4 fold. The enzyme productivity in the fermenter was much higher (310 U/ml) than in shake-flask (180 U/ml). Crude lipase preparation showed pH and temperature activity optima at 3.5 and 45 degrees C respectively. The enzyme is thermostable and highly active in hydrolysing triglycerides and failed to hydrolyse-methyl esters of caprylate and palmitate.
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Affiliation(s)
- K K Kumar
- Biochemical Division, Hindustan Antibiotics Ltd., Pimpri, Pune, India
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21
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Kotha A, Selvaraj L, Rajan CR, Ponrathnam S, Kumar KK, Ambekar GR, Shewale JG. Adsorption and expression of penicillin G acylase immobilized onto methacrylate polymers generated with varying pore generating solvent volume. Appl Biochem Biotechnol 1991; 30:297-302. [PMID: 1768081 DOI: 10.1007/bf02922033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Adsorption and expression of penicillin G acylase was studied on macroporous methacrylate polymer beads of differing pore volume, generated with kerosene. The absorption and expression of the penicillin G acylase was dependent on pore volume. Maximum expression of 57% of adsorbed enzyme was obtained on beads synthesized with 40 mL of kerosene, indicating minimum pore-diffusion limitations.
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Affiliation(s)
- A Kotha
- Chemical Engineering Division, National Chemical Laboratory, Pune, India
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22
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Kumar KK, Ambekar GR, Shewale JG. Immobilization of penicillin G acylase onto ion exchange and hydrophobic resins. Hindustan Antibiot Bull 1990; 32:84-7. [PMID: 1966686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Penicillin G acylase was immobilized on numerous cation exchange resins and hydrophobic adsorbents. Amberlite XAD-7 was the matrix of choice among the matrices studied for the immobilization of enzyme. Binding of 96.8% and expression of 82.6% of the penicillin G acylase was achieved on XAD-7. Penicillin G acylase immobilised on XAD-7 was used for 80 cycles for the production of 6-PA in a stirred tank reactor.
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Affiliation(s)
- K K Kumar
- Hindustan Antibiotics Ltd., Pimpri, Pune
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Abstract
The present study was undertaken to compare the disturbance in bactericidal power of neutrophils in 25 children having protein caloric malnutrition age and sex matched healthy control subjects. There was a highly significant reduction in the percentage of bacteria killed during incubation in children having PCM as compared to healthy control. A direct relationship existed between total serum proteins and bactericidal activity of neutrophils in children having PCM. The impaired bactericidal power of neutrophils can be attributed to impaired synthesis of lysosomal enzymes, glycolytic activity of neutrophils in children having PCM. The exact mechanisms still remain to be elucidated. Decreased bactericidal activity of neutrophils may be one of the mechanisms responsible for infection.
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Nayak KC, Gupta RK, Aggarwal TD, Chadda VS, Kumar KK. A study of incidence of Australia antigen and derangements in liver function tests in leprosy. Indian J Lepr 1989; 61:23-30. [PMID: 2703743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The present study was conducted in 50 patients of various subtypes of leprosy (Lepromatous, Tuberculoid, Borderline borderline) and 25 healthy control, for detection of Australia antigen and various liver function tests (serum protein, cholesterol, alkaline phosphates, SGOT, SGPT, bilirubin and liver biopsy) to see incidence of Australia Antigen and derangement in liver function. It was concluded that incidence of Australia antigen in study and control group was zero. Total serum protein and serum globulin was increased in lepromatous leprosy. A/G ratio was reversed in 34.3% and 50% in lepromatous and tuberculoid leprosy respectively. Granulomatous hepatitis was seen in 66.66% and 50% cases of lepromatous and tuberculoid leprosy respectively. No relationships was established between hepatic lesion, Australia antigen and liver function test.
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Affiliation(s)
- K C Nayak
- Department of Medicine, S.P. Medical College, Bikaner
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Sharma KK, Lodha SK, Sareen PM, Kumar KK. Serum fucose versus ESR in pulmonary tuberculosis. Indian J Med Res 1982; 75:329-31. [PMID: 7106868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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Goyal HK, Kaushik SK, Dhamieja JP, Suman RK, Kumar KK. A study of granulocyte adherence in protein calorie malnutrition. Indian Pediatr 1981; 18:287-92. [PMID: 6793513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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28
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Srivastava DC, Kumar KK. Immunological basis in the aetiology of rheumatic fever (a review). Indian J Pediatr 1979; 46:368-71. [PMID: 397924 DOI: 10.1007/bf02749271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Kumar KK, Agrawal T, Yadav SK, Dhamija JP. "A study of cell mediated immune response in protein calorie malnutrition". Indian Pediatr 1978; 15:803-8. [PMID: 103818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Paradkar VR, Kumar KK, Gopalkrishnan KS. Studies on the nutrition of some antibiotic producing Streptomycetes. 1. Amino acid requirements. Hindustan Antibiot Bull 1968; 10:212-214. [PMID: 5657500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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31
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Mehta SR, Gupta ML, Kumar KK. Turner's syndrome with patent ductus arteriosus. J Assoc Physicians India 1967; 15:325-7. [PMID: 6075947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Mehta SR, Gupta ML, Kumar KK, Subba Rao VV. Electrocardiographic changes in pseudohypertrophic muscular dystrophy. J Indian Med Assoc 1967; 48:391-4. [PMID: 6039399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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33
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Mehta SR, Kumar KK, Gupta ML. Hodgkin's disease with nephrotic syndrome and erythema multiforme. J Indian Med Assoc 1967; 48:279-82. [PMID: 6038537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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34
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Kasliwal RM, Kumar KK, Gupta ML. Modern trends in the therapy of amoebiasis. J Indian Med Assoc 1966; 47:114-9. [PMID: 5915662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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