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Datta AK, Chakraborty U, Chandra A. The thalamic hand: an enigmatic sequela of thalamic stroke. QJM 2022; 115:239-240. [PMID: 35176160 DOI: 10.1093/qjmed/hcac050] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A K Datta
- Department of Neurology, Bangur Institute of Neurosciences, IPGMER & SSKM Hospital Annex-1, 52/1a Shambhunath Pandit Street, Kolkata 700025, West Bengal, India
| | - U Chakraborty
- Department of Neurology, Bangur Institute of Neurosciences, IPGMER & SSKM Hospital Annex-1, 52/1a Shambhunath Pandit Street, Kolkata 700025, West Bengal, India
| | - Atanu Chandra
- A. Chandra, Department of Internal Medicine, RG Kar Medical College and Hospital, 1, Khudiram Bose Sarani, Kolkata 700004, West Bengal, India
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Abstract
BACKGROUND Herpes simplex virus encephalitis (HSVE) is one of the most common infectious causes of sporadic encephalitis. Coronavirus disease (COVID-19) has been associated with immune dysregulation of the host that might increase the risk of infections like HSVE following SARS-CoV-2 infection. There is paucity of literature on post COVID-19 HSVE. This study was conducted with the aim of analyzing the clinical presentation, brain imaging, and outcome of patients presenting with HSVE within 6 weeks of COVID-19 and providing a comprehensive review on the possible mechanisms of post-COVID-19 HSVE. METHODS This observational study included patients who had laboratory-confirmed HSVE (type 1 or type 2) and a history of COVID-19 within the previous 6 weeks. Patients were followed up for 3 months. RESULTS Eight patients were included and all of them had type 1 HSVE. The mean latency of onset of neurological symptoms from being diagnosed with COVID-19 is 23.87 days and a majority of the patients have received injectable steroids with a mean duration of 6.5 days. Behavioral abnormality was the commonest neurological presentation and typical brain imaging involved T2 FLAIR hyperintensities of the medial temporal lobes. All patients received intravenous acyclovir 10 mg/kg every eight hourly for atleast 14 days. One patient with concomitant rhinocerebral mucormycosis succumbed while the majority had a complete recovery. CONCLUSION Possible immune dysregulation in COVID-19 may increase the susceptibility of HSVE in patients with a history of recent SARS-CoV-2 infection. The clinical manifestations and laboratory findings of HSVE in such patients are similar to typical HSVE.
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Affiliation(s)
- S Gupta
- From the Department of Neurology, Bangur Institute of Neurosciences, Institute of Post Graduate Medical Education and Research, Annex-1, 52/1a Shambhunath Pandit Street, Kolkata 700025, India
| | - A Dutta
- From the Department of Neurology, Bangur Institute of Neurosciences, Institute of Post Graduate Medical Education and Research, Annex-1, 52/1a Shambhunath Pandit Street, Kolkata 700025, India
| | - U Chakraborty
- Address correspondence to Dr Uddalak Chakraborty, Department of Neurology, Bangur Institute of Neurosciences, Institute of Post Graduate Medical Education and Research, Annex-1, 52/1a Shambhunath Pandit Street, Kolkata 700025, West Bengal, India.
| | - R Kumar
- Department of Neurology, G.S Neuroscience Clinic and Research Center, 3/214, Boring Rd, New Patliputra Colony, Patliputra Colony, Patna, Bihar 800013, India
| | - D Das
- From the Department of Neurology, Bangur Institute of Neurosciences, Institute of Post Graduate Medical Education and Research, Annex-1, 52/1a Shambhunath Pandit Street, Kolkata 700025, India
- Woodlands Multi-Speciality Hospital and C K Birla Hospitals,8/5, Alipur Rd, Alipore, Kolkata, West Bengal 700027, India
| | - B K Ray
- From the Department of Neurology, Bangur Institute of Neurosciences, Institute of Post Graduate Medical Education and Research, Annex-1, 52/1a Shambhunath Pandit Street, Kolkata 700025, India
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Chakraborty U, Hati A, Chandra A. Classical hand and foot deformities in rheumatoid arthritis. QJM 2022; 115:107-108. [PMID: 34904665 DOI: 10.1093/qjmed/hcab316] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- U Chakraborty
- Department of Neurology, Bangur Institute of Neurosciences, IPGMER and SSKM, 52/1a, Sambhunath Pandit Street, Gokhel Road, Kolkata 700020, India
| | - A Hati
- Department of Internal Medicine, RG Kar Medical College and Hospital, 1, Khudiram Bose Sarani, Kolkata 700004, India
| | - A Chandra
- Department of Internal Medicine, RG Kar Medical College and Hospital, 1, Khudiram Bose Sarani, Kolkata 700004, India
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Chakraborty U, Hajra K, Chandra A. Classical neurocutaneous manifestations of tuberous sclerosis complex. QJM 2022; 115:115-116. [PMID: 34963004 DOI: 10.1093/qjmed/hcab332] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- U Chakraborty
- Department of Neurology, Bangur Institute of Neurosciences, IPGMER and SSKM,, 52/1a, Sambhunath Pandit Street, Gokhel Road, Kolkata 700020, India
| | - K Hajra
- Department of Dermatology, School of Tropical Medicine, 108, Chittaranjan Avenue, Kolkata 700073, India
| | - A Chandra
- Department of Internal Medicine, RG Kar Medical College and Hospital, 1, Khudiram Bose Sarani, Kolkata 700004, India
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Hajra K, Chakraborty U, Chatterjee K, Chandra A, Halder S. Multisystem inflammatory syndrome in adults (MIS-A): a new addition to COVID-19 puzzle. J Eur Acad Dermatol Venereol 2021; 36:e182-e185. [PMID: 34839549 PMCID: PMC9011744 DOI: 10.1111/jdv.17841] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/11/2021] [Accepted: 11/26/2021] [Indexed: 01/10/2023]
Affiliation(s)
- K Hajra
- Department of Dermatology and Venereal Disease, School of Tropical Medicine, Kolkata, India
| | - U Chakraborty
- Department of Neurology, Bangur Institute of Neurosciences, IPGMER & SSKM Hospital, Kolkata, India
| | - K Chatterjee
- Department of Dermatology and Venereal Disease, School of Tropical Medicine, Kolkata, India
| | - A Chandra
- Department of Internal Medicine, R.G.Kar Medical College and Hospital, Kolkata, India
| | - S Halder
- Department of Dermatology and Venereal Disease, School of Tropical Medicine, Kolkata, India
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Chakraborty U, Chandra A. Starry sky appearance in Tuberculoma. QJM 2021; 114:605-606. [PMID: 33890673 DOI: 10.1093/qjmed/hcab120] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- U Chakraborty
- Department of Neurology, Bangur Institute of Neurosciences, IPGMER and SSKM Hospital, Annex 1, 52/1 Shambhunath Pandit Street, Kolkata 700020, West Bengal, India
| | - A Chandra
- Department of Internal Medicine, RG Kar Medical College and Hospital, Khudiram Bose Sarani, Kolkata 700004, West Bengal, India
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Chakraborty U, Biswas P, Chandra A, Pal J, Ray AK. Chik sign: post-chikungunya hyperpigmentation. QJM 2021; 114:137-138. [PMID: 33367777 DOI: 10.1093/qjmed/hcaa329] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- U Chakraborty
- Department of Internal Medicine, R.G.Kar Medical College and Hospital, Room No-11, Main Boy's hostel (Inside RG Kar Medical College Campus), 1, Khudiram Bose Sarani, Kolkata 700004, India
| | - P Biswas
- Department of Internal Medicine, R.G.Kar Medical College and Hospital, Room No-6, Girl's hostel (Inside RG Kar Medical College Campus), 1, Khudiram Bose Sarani, Kolkata 700004, India
| | - A Chandra
- Department of Internal Medicine, R.G.Kar Medical College and Hospital, Quarter No-1, Doctor's Quarter (Inside RG Kar Medical College Campus), 1, Khudiram Bose Sarani, Kolkata 700004, India
| | - J Pal
- Department of Internal Medicine, R.G.Kar Medical College and Hospital, 37a, Panpara 1st lane, Talpukur, North 24-parganas, Kolkata 700123, India
| | - A K Ray
- Department of Internal Medicine, R.G Kar Medical College and Hospital, Room No 23, Main Boy's hostel (Inside RG Kar Medical College Campus), 1, Khudiram Bose Sarani, Kolkata 700004, India
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Chakraborty U, Chakraborty BN, Chakraborty AP, Dey PL. Water stress amelioration and plant growth promotion in wheat plants by osmotic stress tolerant bacteria. World J Microbiol Biotechnol 2013. [PMID: 23239372 DOI: 10.1007/s11274-012-1234-1238] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Soil microorganisms with potential for alleviation of abiotic stresses in combination with plant growth promotion would be extremely useful tools in sustainable agriculture. To this end, the present study was initiated where forty-five salt tolerant bacterial isolates with ability to grow in high salt medium were obtained from the rhizosphere of Triticum aestivum and Imperata cylindrica. These bacteria were tested for plant-growth-promoting rhizobacteria traits in vitro such as phosphate solubilization, siderophore, ACC deaminase and IAA production. Of the forty-five isolates, W10 from wheat rhizosphere and IP8 from blady grass rhizosphere, which tested positive in all the tests were identified by morpholological, biochemical and 16SrDNA sequencing as Bacillus safensis and Ochrobactrum pseudogregnonense respectively and selected for in vivo studies. Both the bacteria could promote growth in six varieties of wheat tested in terms of increase in root and shoot biomass, height of plants, yield, as well as increase in chlorophyll content. Besides, the wheat plants could withstand water stress more efficiently in presence of the bacteria as indicated by delay in appearance of wilting symptoms increases in relative water content of treated water stressed plants in comparison to untreated stressed ones, and elevated antioxidant responses. Enhanced antioxidant responses were evident as elevated activities of enzymes such as catalase, peroxidase, ascorbate peroxidase, superoxide dismutase and glutathione reductase as well as increased accumulation of antioxidants such as carotenoids and ascorbate. Results clearly indicate that the ability of wheat plants to withstand water stress is enhanced by application of these bacteria which also function as plant growth promoting rhizobacteria.
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Affiliation(s)
- U Chakraborty
- Plant Biochemistry Laboratory, Department of Botany, University of North Bengal, Siliguri, 734013 West Bengal, India.
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Chakraborty U, Goswami A, Saha S, Mukherjee T, Dey SK, Majumdar S, Pal NK. Tumour necrosis factor-alpha and nitric oxide response in different categories of tuberculosis patients. Int J Tuberc Lung Dis 2013; 17:505-10. [DOI: 10.5588/ijtld.12.0196] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Chakraborty U, Chakraborty B, Allay S, De U, Chakraborty A. DUAL APPLICATION OF BACILLUS PUMILUS AND GLOMUS MOSSEAE FOR IMPROVEMENT OF HEALTH STATUS OF MANDARIN PLANTS. ACTA ACUST UNITED AC 2011. [DOI: 10.17660/actahortic.2011.892.25] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chakraborty U, Chakraborty BN, Basnet M, Chakraborty AP. Evaluation of Ochrobactrum anthropi TRS-2 and its talc based formulation for enhancement of growth of tea plants and management of brown root rot disease. J Appl Microbiol 2009; 107:625-34. [PMID: 19426277 DOI: 10.1111/j.1365-2672.2009.04242.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIM To evaluate Ochrobactrum anthropi TRS-2 isolated from tea rhizosphere and its talc based formulation for growth promotion and management of brown root rot disease of tea. METHODS AND RESULTS Ochrobactrum anthropi TRS-2, isolated from tea rhizosphere could solubilize phosphate, produce siderophore and IAA in vitro and also exhibited antifungal activity against six test pathogens. Application of an aqueous suspension of O. anthropi to the rhizosphere of nursery grown tea seedlings of five varieties of tea (TV-18, T-17, HV-39, S-449, UP-3 and) led to enhanced growth of the treated plants, as evidenced by increase in height, in the number of shoots and number of leaves per shoot. Treatment with O. anthropi also decreased brown root rot of tea, caused by Phellinus noxius. Multifold increase in activities of chitinase, beta-1,3-glucanase, peroxidase and phenylalanine ammonia lyase in tea plants was observed on application of O. anthropi to soil followed by inoculation with P. noxius. A concomitant increase in accumulation of phenolics was also obtained. Further, talc based formulation of O. anthropi was prepared and its survival determined every month up to a period of 12 months. Ochrobactrum anthropi could survive in the formulation up to a period of 9 months with a concentration of 7.0 log(10) CFU g(-1), after which there was a decline. Talc formulation was as effective as aqueous suspensions in both plant growth promotion and disease suppression. CONCLUSION Ochrobactrum anthropi, either in aqueous suspension or as talc formulation induced growth of tea plants and suppressed brown root rot disease. It induced defense responses in tea plants. SIGNIFICANCE AND IMPACT OF THE STUDY Ochrobactrum anthropi and its talc based formulation can be considered as an addition to available plant growth promoting rhizobacteria (PGPR) currently being used for field application. The present study offers a scope of utilizing this bacterium for growth promotion and disease management which would help in reduction of the use of chemicals in tea plantations.
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Affiliation(s)
- U Chakraborty
- Immuno Phytopathology Laboratory, Department of Botany, University of North Bengal, Siliguri-734013, West Bengal, India.
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Holtman J, Johnson-Hardy J, Crooks P, Chakraborty U, Wala E. Novel opioid-nicotinic combination drug therapy for pain. The Journal of Pain 2009. [DOI: 10.1016/j.jpain.2009.01.124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Dalli AK, Saha G, Chakraborty U. Characterization of antimicrobial compounds from a common fern, Pteris biaurita. Indian J Exp Biol 2007; 45:285-90. [PMID: 17373375] [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: 05/14/2023]
Abstract
Methanol extract was prepared from the fronds of Pteris biaurita and partial purification was done by solvent partitioning with diethyl ether and ethyl acetate, followed by hydrolysis and further partitioning with ethyl acetate. The three fractions, thus obtained were bioassayed separately against five test fungi--Curvularia lunata, Fomes lamaoensis, Poria hypobrumea, Fuasrium oxysporum and a bacterium--Bacillus pumilus, by spore germination, radial growth and agar cup techniques. Results revealed that ethyl acetate fraction (III) contained the active principle. TLC plate bioassay of the active fraction revealed inhibition zone at an Rf of 0.5-0.65. Silica gel from this region was scraped, eluted in methanol and subjected to UV-spectrophotometric analysis. An absorption maxima of 278 nm was recorded. HPLC analysis of TLC-eluate revealed a single peak with retention time of 8.1 min. GC-MS analysis revealed six major peaks in the retention time range of 7.2-10.9 min. Comparison with GC-MS libraries revealed that the extracts may contain a mixture of eicosenes and heptadecanes.
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Affiliation(s)
- A K Dalli
- Plant Biochemistry Laboratory, Department of Botany, University of North Bengal, Siliguri 734013, India
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Basak M, Sharma M, Chakraborty U. Biochemical responses of Camellia sinensis (L.) O. Kuntze to heavy metal stress. J Environ Biol 2001; 22:37-41. [PMID: 11480349] [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: 05/23/2023]
Abstract
Three heavy metals-mercury (II), copper (II) and nickel (II), each at a concentration of 10 and 100 micrograms/ml, were tested for their effects on various biochemical constituents of tea leaves. Both NI (II) and Hg (II) decreased the phenolic contents, while Cu (II) increased it to some extent. The metal treatments enhanced the activity of phenyl alanine ammonia lyase (PAL), while the activity of poly phenol oxidase (PPO) showed a decline. Heavy metal stress also decreased the chlorophyll content of the leaves, along with a significant reduction in Hill activity. Proline content increased significantly in all treatments.
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Affiliation(s)
- M Basak
- Plant Biochemistry Laboratory, Department of Botany, University of North Bengal, Siliguri-734 430, India
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Chakraborty BN, Sarkar B, Chakraborty U. Detection of cross-reactive antigens shared by Fusarium oxysporum and Glycine max by indirect ELISA and their cellular location in root tissues. Folia Microbiol (Praha) 1997; 42:607-12. [PMID: 9438359 DOI: 10.1007/bf02815474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 02/05/2023]
Abstract
Pathogenicity test of Fusarium oxysporum on ten cultivars of soybean revealed Soymax and Punjab-1 to be most resistant while JS-2 and UPSM-19 were most susceptible. Antigens were prepared from the roots of all the ten varieties of soybean and the mycelium of F. oxysporum. Polyclonal antisera were raised against the mycelial suspension of F. oxysporum and the root antigen of the susceptible cultivar UPSM-19. Cross reactive antigens shared by the host and the pathogen were detected first by immunodiffusion. The immunoglobulin fraction of the antiserum was purified by ammonium sulfate precipitation and DEAE-Sephadex column chromatography. The immunoglobulin fractions were used for detection of cross-reactive antigens by enzyme-linked immunosorbent assay. In enzyme-linked immunosorbent assay, antigens of susceptible cultivars showed higher absorbance values when tested against the purified anti-F. oxysporum antiserum. Antiserum produced against UPSM-19 showed cross-reactivity with the antigens of other cultivars. Indirect staining of antibodies using fluorescein isothiocyanate indicated that in cross-sections of roots of susceptible cultivar (UPSM-19) cross-reactive antigens were concentrated around xylem elements, endodermis and epidermal cells, while in the resistant variety, fluorescence was concentrated mainly around epidermal cells and distributed in the cortical tissues. CRAs were also present in microconidia, macroconidia and chlamydospores of the fungus.
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Affiliation(s)
- B N Chakraborty
- Plant Pathology Laboratory, University of North Bengal, Siliguri, India
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Chakraborty U, Basu P, Das R, Saha A, Chakraborty BN. Evaluation of antiserum raised againstPestalotiopsis theœ for the detection of grey blight of tea by ELISA. Folia Microbiol (Praha) 1996. [DOI: 10.1007/bf02815691] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chakraborty U, Das G, Chakraborty BN. Factors influencing spore germination, appressoria formation and disease development inCamellia sinensis byGlomerella cingulata. Folia Microbiol (Praha) 1995. [DOI: 10.1007/bf02815415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Chakraborty B, Chakraborty U, Basu K. Antagonism of Erwinia herbicola towards Leptosphaeria maculans causing blackleg disease of Brassica napus. Lett Appl Microbiol 1994; 18:74-76. [DOI: 10.1111/j.1472-765x.1994.tb00807.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Chakraborty U, Chakraborty BN, Kapoor M. Heat shock protein synthesis and restriction fragment length polymorphism in a virulent and a weakly virulent strain of Leptosphaeria maculans. Can J Microbiol 1992. [DOI: 10.1139/m92-183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two strains of Leptosphaeria maculans, differing in virulence on Brassica napus and with distinct cultural characteristics, were tested for their heat shock response. Following exposure to elevated temperatures, both the strains responded by rapidly synthesizing a set of heat shock proteins (HSPs). Protein synthesis profiles, visualized by labelling with [35S]methionine and resolution on one-dimensional Laemmli gels, revealed a classical heat shock specific pattern: three major thermally induced polypeptides corresponding to the 90-, 80-, and 70-kDa HSPs were observed in both strains. At the optimum heat shock temperature of 40 °C, 11 and 5 new polypeptides appeared labelled in the virulent and weakly virulent strains, respectively. At 45 °C only the three prominent high molecular mass polypeptides were synthesized by the virulent strain, while the weakly virulent strain synthesized these and also showed sustained synthesis of several other normal cellular proteins. Protein synthesis was completely abolished on transfer to 48 °C. Qualitative and quantitative differences were detected in the overall polypeptide profiles of the two strains. Southern blots of genomic DNA of the two strains, digested with three restriction endonucleases and probed with a fragment of the Neurospora crassa hsp70 gene, revealed restriction fragment length polymorphisms with all the three enzymes. Key words: Leptosphaeria maculans, virulent–avirulent pathotypes, heat shock proteins, RFLP, hsp70.
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Chakraborty U, Chakraborty BN, Purkayastha RP. Application of growth substances and mineral nutrition affecting disease development and glyceollin production of soybean. Folia Microbiol (Praha) 1989. [DOI: 10.1007/bf02814459] [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: 11/27/2022]
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Musser JH, Chakraborty U, Bailey K, Sciortino S, Whyzmuzis C, Amin D, Sutherland CA. Synthesis and antilipolytic activities of quinolyl carbanilates and related analogues. J Med Chem 1987; 30:62-7. [PMID: 3806604 DOI: 10.1021/jm00384a011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A series of quinolyl carbanilates was prepared and tested as antilipolytic agents. These compounds inhibited production of glycerol from rat adipocytes and inhibited liberation of free fatty acids from triolein by canine cardiac triglyceride lipases. An extensive structure-activity relationship study indicated that 8-quinolyl 4-methoxycarbanilate (1) contained features necessary for maximum potency in vitro. Substituting a benzofuranyl group for the quinolyl group of 1 provided the most interesting compound on the basis of both potency and structural novelty. 7-Benzofuranyl 4-methoxycarbanilate (44) has IC50's of 16 and 0.3 microM in the myocardial lipase and rat adipocyte assays, respectively. In vivo, compound 44 was orally active as an inhibitor (97% at 25 mg/kg) of lipolysis in the rat.
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Abstract
Bacterization of soybean seeds or roots with Rhizobium japonicum significantly reduced charcoal rot disease caused by Macrophomina phaseolina . Rhizobium japonicum inhibited the growth of M. phaseolina on both liquid and solid media. Replacement of nutrient medium with culture filtrate of R. japonicum significantly reduced mycelial growth of M. phaseolina . Whole culture extracts of R. japonicum yielded a toxic substance which was identified as rhizobitoxine after chromatographic, ultraviolet, and infrared spectrophotometric analyses. This compound also was detected in the roots of soybean inoculated with either R. japonicum alone or in combination of R. japonicum and M. phaseolina . Dosage response curves with rhizobitoxine showed it to be antifungal. The possible role of rhizobitoxine in protecting soybean roots from M. phaseolina infection is discussed.
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