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Guha P, Roy B, Nahak P, Karmakar G, Karak A, Bykov AG, Akentiev AB, Noskov BA, Dutta K, Ghosh C, Panda AK. Dendrimer Induced Bilayer Disintegration of Hybrid Vesicles. J Oleo Sci 2024; 73:547-562. [PMID: 38556288 DOI: 10.5650/jos.ess23097] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024] Open
Abstract
Physicochemical investigations on the inclusion of anionic polyamidoaminesuccinamic acid dendrimer, generation 5 (PAMAM-SA, G5) with positively charged hybrid vesicles (HCV), prepared using soylecithin, ion pair amphiphile (IPA), cholesterol and dihexadecyldimethylammonium bromide, were investigated by dynamic light scattering, transmission electron/atomic force microscopy (TEM/AFM), differential scanning calorimetry, fluorescence spectroscopy and surface pressure-time isotherm studies. Adsorption of dendrimer onto vesicle surface and subsequent bilayer disruption strongly depends on the bilayer composition and dendrimer concentration. Change in the zeta potential value with increasing dendrimer concentration suggests the dendrimer-vesicle interaction to be electrostatic in nature. AFM studies also confirm the adsorption of dendrimer as well as hole formation in the bilayer. Impact of the inclusion of dendrimer into the bilayer were further investigated through differential scanning calorimetry by monitoring the chain melting temperature and enthalpy of the chain melting processes. Dendrimer at low concentration does not alter bilayer integrity, while hole formations are noted at higher dendrimer concentration. Fluorescence anisotropy studies confirm the adsorption and subsequent bilayer disruption due to dendrimer inclusion. Dendrimer induced vesicle disintegration kinetics conclusively illustrate the transformation of cationic bilayer to monolayer and thereby exposing the role of IPA. In vitro cytotoxicity studies on PAMAM-SA, G5 and HCVs mixtures against human breast cancer cell line suggest that dendrimer-liposome aggregates (dendriosomes) exhibit substantial anticancer activities with insignificant side effects. It is expected that the dendriosomes may have application to host and deliver anticancer drug in the field of targeted drug delivery.
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Affiliation(s)
- Pritam Guha
- Department of Chemistry, University of North Bengal
- Department for Biomaterials Research, Polymer Institute, Slovak Academy of Sciences
| | - Biplab Roy
- Department of Chemistry, University of North Bengal
- Chemistry of Interfaces Group, Luleå University of Technology
| | | | | | - Atanu Karak
- Department of Chemistry, Vidyasagar University
| | - Alexey G Bykov
- Department of Colloid Chemistry, St. Petersburg State University
| | | | - Boris A Noskov
- Department of Colloid Chemistry, St. Petersburg State University
| | - Kunal Dutta
- Department of Human Physiology, Vidyasagar University
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Roy B, Guha P, Chang CH, Nahak P, Karmakar G, Bykov AG, Akentiev AV, Noskov BA, Patra A, Dutta K, Ghosh C, Panda AK. Effect of cationic dendrimer on membrane mimetic systems in the form of monolayer and bilayer. Chem Phys Lipids 2024; 258:105364. [PMID: 38040405 DOI: 10.1016/j.chemphyslip.2023.105364] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/01/2023] [Accepted: 11/26/2023] [Indexed: 12/03/2023]
Abstract
Interactions between a zwitterionic phospholipid, 1, 2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC) and four anionic phospholipids dihexadecyl phosphate (DHP), 1, 2-dimyristoyl-sn-glycero-3-phosphoglycerol (DMPG), 1, 2-dipalmitoyl-sn-glycero-3-phosphate (DPP) and 1, 2-dipalmitoyl-sn-glycero-3-phospho ethanol (DPPEth) in combination with an additional amount of 30 mol% cholesterol were separately investigated at air-buffer interface through surface pressure (π) - area (A) measurements. π-A isotherm derived parameters revealed maximum negative deviation from ideality for the mixtures comprising 30 mol% anionic lipids. Besides the film functionality, structural changes of the monomolecular films at different surface pressures in the absence and presence of polyamidoamine (PAMAM, generation 4), a cationic dendrimer, were visualised through Brewster angle microscopy and fluorescence microscopic studies. Fluidity/rigidity of monolayers were assessed by surface dilatational rheology studies. Effect of PAMAM on the formation of adsorbed monolayer, due to bilayer disintegration of liposomes (DPPC:anionic lipids= 7:3 M/M, and 30 mol% cholesterol) were monitored by surface pressure (π) - time (t) isotherms. Bilayer disintegration kinetics were dependent on lipid head group and chain length, besides dendrimer concentration. Such studies are considered to be an in vitro cell membrane model where the alteration of molecular orientation play important roles in understanding the nature of interaction between the dendrimer and cell membrane. Liposome-dendrimer aggregates were nontoxic to breast cancer cell line as well as in doxorubicin treated MDA-MB-468 cell line suggesting their potential as drug delivery systems.
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Affiliation(s)
- Biplab Roy
- Department of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India; Chemistry of Interfaces Group, Luleå University of Technology, SE-971 87 Luleå, Sweden
| | - Pritam Guha
- Department of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India; Department for Biomaterials Research, Polymer Institute, Slovak Academy of Sciences, 845 41 Bratislava, Slovakia
| | - Chien-Hsiang Chang
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Prasant Nahak
- Department of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Gourab Karmakar
- Department of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Alexey G Bykov
- Department of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Alexander V Akentiev
- Department of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Boris A Noskov
- Department of Colloid Chemistry, St. Petersburg State University, Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Anuttam Patra
- Chemistry of Interfaces Group, Luleå University of Technology, SE-971 87 Luleå, Sweden
| | - Kunal Dutta
- Department of Human Physiology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Chandradipa Ghosh
- Department of Human Physiology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Amiya Kumar Panda
- Department of Chemistry, Vidyasagar University, Midnapore 721102, West Bengal, India.
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Leon M, Guha P, Lewis G, Heckman M, Siddiqui H, Chen A. Complications associated with the use of prophylactic ureteral stents in gynecologic surgery. Am J Obstet Gynecol 2022. [DOI: 10.1016/j.ajog.2021.12.065] [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: 11/01/2022]
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Knížatová N, Massányi M, Roychoudhury S, Guha P, Greifová H, Tokárová K, Jambor T, Massányi P, Lukáč N. Is there impact of the SARS-CoV-2 pandemic on steroidogenesis and fertility? Physiol Res 2021; 70:S161-S175. [PMID: 34913350 DOI: 10.33549/physiolres.934756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
In December of 2019, several cases of unknown atypical respiratory diseases emerged in Wuhan, Hubei Province in China. After preliminary research, it was stated that the disease is transmittable between humans and was named COVID-19. Over the course of next months, it spread all over the world by air and sea transport and caused a global pandemic which affects life of everyone now-a-days. A large number of countries, have since been forced to take precautions such as curfews, lockdowns, wearing facemasks etc. Even with vaccines being produced in mass numbers, lack of targeted therapy continues to be a major problem. According to studies so far it seems that elderly people are more vulnerable to severe symptoms while children tend to by asymptomatic or have milder form the disease. In our review, we focused on gathering data about the virus itself, its characteristics, paths of transmission, and its effect on hormone production and secretion. In such, there is insufficient information in the literature worldwide, especially the ones that focus on the effect of COVID-19 on individual organs systems within the human body. Hence, the present evidence-based study focused on the possible effects of COVID-19 on adrenal gland and gonads i.e. on the process of steroidogenesis and fertility.
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Affiliation(s)
- N Knížatová
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic.
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Guha P, Cardoza F, Chen A, Dinh T, Paul P, DeStephano C. Choosing the Route of Morcellation for Minimally Invasive Gynecologic Surgeries. J Minim Invasive Gynecol 2018. [DOI: 10.1016/j.jmig.2018.09.742] [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: 11/28/2022]
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Jijon A, Guha P, Heckman M, Chen A, Dinh T, DeStephano C. Assessment of Laparoscopic Suturing Performance with the Global Operative Assessment of Laparoscopic Skills (GOALS). J Minim Invasive Gynecol 2018. [DOI: 10.1016/j.jmig.2018.09.636] [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: 11/29/2022]
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Roy B, Guha P, Nahak P, Karmakar G, Maiti S, Mandal AK, Bykov AG, Akentiev AV, Noskov BA, Tsuchiya K, Torigoe K, Panda AK. Biophysical Correlates on the Composition, Functionality, and Structure of Dendrimer-Liposome Aggregates. ACS Omega 2018; 3:12235-12245. [PMID: 31459298 PMCID: PMC6645486 DOI: 10.1021/acsomega.8b01187] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 09/13/2018] [Indexed: 06/10/2023]
Abstract
Interaction between negatively charged liposomes and cationic polyamidoamine dendrimers of different generations was investigated through size, zeta potential, turbidity, electron microscopy, atomic force microscopy, fluorescence spectroscopy, and calorimetric studies. Liposomes with the binary combination of 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC) + dihexadecyl phosphate, DPPC + 1,2-dimyristoyl-sn-glycero-3-phosphoglycerol, DPPC + 1,2-dipalmitoyl-sn-glycero-3-phosphate, and DPPC + 1,2-dipalmitoyl-sn-glycero-3-phosphoethanol were stable up to 60 days. The electrostatic nature of dendrimer-lipid bilayer interaction was evidenced through charge neutralization and subsequent reversal upon added dendrimer to liposome. Dendrimer-liposome interaction depended on its generation (5 > 4 > 3) in addition to the charge, head groups, and hydrocarbon chain length of lipids. Fluorescence anisotropy and differential scanning calorimetry studies suggest the fluidization of the bilayer, although the surface rigidity was enhanced by the added dendrimers. Thermodynamic parameters of the interaction processes were evaluated by isothermal titration and differential scanning calorimetric studies. The binding processes were exothermic in nature. The enthalpy of transition of the chain melting of lipids decreased systematically with increasing dendrimer concentration and generation. Dendrimer-liposome aggregates were nontoxic to healthy human blood cell, suggesting the potential of such aggregates as drug delivery systems.
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Affiliation(s)
- Biplab Roy
- Department
of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Pritam Guha
- Department
of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Prasant Nahak
- Department
of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Gourab Karmakar
- Department
of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Souvik Maiti
- Proteomics
and Structural Biology Unit, CSIR-Institute
of Genomics and Integrative Biology, Mall Road, Delhi 110 007, India
| | - Amit Kumar Mandal
- Chemical
Biology Laboratory, Department of Sericulture, Raiganj University, Uttar Dinajpur 733134, West Bengal, India
| | - Alexey G. Bykov
- Department
of Colloid Chemistry, St. Petersburg State
University, Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Alexander V. Akentiev
- Department
of Colloid Chemistry, St. Petersburg State
University, Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Boris A. Noskov
- Department
of Colloid Chemistry, St. Petersburg State
University, Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Koji Tsuchiya
- Department
of Pure and Applied Chemistry, Tokyo University
of Science, 2641 Yamazaki, Noda, Tokyo 278-8510, Japan
| | - Kanjiro Torigoe
- Department
of Pure and Applied Chemistry, Tokyo University
of Science, 2641 Yamazaki, Noda, Tokyo 278-8510, Japan
| | - Amiya Kumar Panda
- Department
of Chemistry and Chemical Technology, Vidyasagar
University, Midnapore 721102, West Bengal, India
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Nahak P, Gajbhiye RL, Karmakar G, Guha P, Roy B, Besra SE, Bikov AG, Akentiev AV, Noskov BA, Nag K, Jaisankar P, Panda AK. Orcinol Glucoside Loaded Polymer - Lipid Hybrid Nanostructured Lipid Carriers: Potential Cytotoxic Agents against Gastric, Colon and Hepatoma Carcinoma Cell Lines. Pharm Res 2018; 35:198. [PMID: 30151753 DOI: 10.1007/s11095-018-2469-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 04/16/2018] [Accepted: 07/30/2018] [Indexed: 12/30/2022]
Abstract
PURPOSE Orcinol glucoside (OG) - loaded nanostructured lipid carrier (NLC), coated with polyethylene glycol-25/55-stearate (PEG-25/55-SA), were explored for delivering OG to improve in vitro cytotoxicity against gastrointestinal tract (GIT), colon and hepatoma carcinoma cell lines. It is being expected that the PEGylated formulations would possess the sustainability in withstanding the adverse physiological extremities like the most significant metabolic activities and phase I / II enzymatic activities in the intestines. METHODS NLCs were prepared using tristearin, oleic acid and PEG-25/55-stearate by hot homogenization-ultrasonic dispersion; characterized by DLS, TEM, SEM, AFM, entrapment efficiency and drug loading capacity studies. RESULTS NLC diameter ranged from 160 to 230 nm with negative zeta potential of -8 to -20 mV. TEM/SEM and AFM studies suggest spherical and smooth surface morphologies. Differential scanning calorimetry studies reveal the loss of crystallinity when OG was incorporated into the NLC. NLCs showed initial burst release, followed by sustained release of OG. PEG-NLC exhibited superior anticancer activity against GIT and also in hepatoma cancer cell lines. CONCLUSIONS This is the first report demonstrating a practical approach for possible oral delivery of OG in GIT and targeting hepatoma cancer, warranting further in vivo studies for superior management of GIT cancer.
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Affiliation(s)
- Prasant Nahak
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, 734 013, India
| | - Rahul L Gajbhiye
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullcik Road, Jadavpur, Kolkata, West Bengal, 700032, India
| | - Gourab Karmakar
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, 734 013, India
| | - Pritam Guha
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, 734 013, India
| | - Biplab Roy
- Department of Chemistry, University of North Bengal, Darjeeling, West Bengal, 734 013, India
| | - Shila Elizabeth Besra
- Cancer Biology and Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullcik Road, Jadavpur, Kolkata, West Bengal, 700032, India
| | - Alexey G Bikov
- Department of Colloid Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Saint Petersburg, 198504, Russia
| | - Alexander V Akentiev
- Department of Colloid Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Saint Petersburg, 198504, Russia
| | - Boris A Noskov
- Department of Colloid Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Saint Petersburg, 198504, Russia
| | - Kaushik Nag
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Parasuraman Jaisankar
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullcik Road, Jadavpur, Kolkata, West Bengal, 700032, India.
| | - Amiya Kumar Panda
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, West Bengal, 721 102, India.
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Guha P, Roy B, Nahak P, Karmakar G, Chang CH, Bikov AG, Akentiev AB, Noskov BA, Mandal AK, Kumar A, Hassan P, Aswal V, Misono T, Torigoe K, Panda AK. Exploring the dual impact of hydrocarbon chainlength and the role of piroxicam a conventional NSAID on soylecithin/ion pair amphiphiles mediated hybrid vesicles for brain – tumor targeted drug delivery. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.03.025] [Citation(s) in RCA: 2] [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: 12/27/2022]
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Karmakar G, Nahak P, Chettri P, Roy B, Guha P, Tsuchiya K, Torigoe K, Kumar A, Nath RK, Bhowmik S, De UC, Nag K, Panda AK. Physicochemical Characterization of Chrysin-Derivative-Loaded Nanostructured Lipid Carriers with Special Reference to Anticancer Activity. J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gourab Karmakar
- Department of Chemistry; University of North Bengal; Darjeeling 734013 West Bengal India
| | - Prasant Nahak
- Department of Chemistry; University of North Bengal; Darjeeling 734013 West Bengal India
| | - Priyam Chettri
- Department of Biotechnology; University of North Bengal; Darjeeling 734013 West Bengal India
| | - Biplab Roy
- Department of Chemistry; University of North Bengal; Darjeeling 734013 West Bengal India
| | - Pritam Guha
- Department of Chemistry; University of North Bengal; Darjeeling 734013 West Bengal India
| | - Koji Tsuchiya
- Department of Pure and Applied Chemistry; Tokyo University of Science, 2641 Yamazaki, Noda; Tokyo 278-8510 Japan
| | - Kanjiro Torigoe
- Department of Pure and Applied Chemistry; Tokyo University of Science, 2641 Yamazaki, Noda; Tokyo 278-8510 Japan
| | - Anoop Kumar
- Department of Biotechnology; University of North Bengal; Darjeeling 734013 West Bengal India
| | - Ranendu K. Nath
- Department of Chemistry; Tripura University, Suryamaninagar; Agartala 799022 Tripura India
| | - Sukhen Bhowmik
- Department of Chemistry; Tripura University, Suryamaninagar; Agartala 799022 Tripura India
| | - Utpal C. De
- Department of Chemistry; Tripura University, Suryamaninagar; Agartala 799022 Tripura India
| | - Kaushik Nag
- Department of Biochemistry; Memorial University of Newfoundland; St. John's Newfoundland and Labrador Canada
| | - Amiya K. Panda
- Department of Chemistry and Chemical Technology; Vidyasagar University; Midnapore 721102 West Bengal India
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Guha P, Chen A, Pettit P. 33: Robotic excision of pubovaginal sling. Am J Obstet Gynecol 2018. [DOI: 10.1016/j.ajog.2017.12.158] [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: 11/25/2022]
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Espinal M, Guha P, Dinh T, Robertson M, Spaulding A, Colibaseanu D, DeStephano C. Use of Administrative Inpatient and Outpatient Databases to Determine Routes of Hysterectomy: the Different Stories They Tell in Florida. J Minim Invasive Gynecol 2017. [DOI: 10.1016/j.jmig.2017.08.029] [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: 11/30/2022]
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Affiliation(s)
- P. Guha
- Agricultural and Food Engineering Department, Indian Institute of Technology , Kharagpur, West Bengal, India
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Bhadra A, Karmakar G, Nahak P, Chettri P, Roy B, Guha P, Mandal A, Nath R, Panda A. Impact of detergents on the physiochemical behavior of itraconazole loaded nanostructured lipid carriers. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.12.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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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Roy B, Guha P, Bhattarai R, Nahak P, Karmakar G, Chettri P, Panda AK. Influence of Lipid Composition, pH, and Temperature on Physicochemical Properties of Liposomes with Curcumin as Model Drug. J Oleo Sci 2017; 65:399-411. [PMID: 27150333 DOI: 10.5650/jos.ess15229] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The physicochemical properties of large unilamellar vesicles (LUVs) were assessed with respect to lipid composition, pH, time, and temperature by monitoring their size, zeta potential, drug payload, and thermal behavior. A conventional thin film hydration technique was employed to prepare liposomes from soy phosphatidylcholine (SPC), dipalmitoylphosphatidylcholine (DPPC), dipalmitoylphosphatidylglycerol (DPPG), and a 7:3 (M/M) mixture of DPPC+DPPG along with 30 mole% cholesterol in each combination. While the size of liposomes depended on lipid composition, pH and temperature, the zeta potential was found to be independent of the pH of the medium, although it varied with liposome type. Spherical morphology and bilayer were observed by electron microscopy. The phase transition temperature increased with decreasing pH. Membrane micro-viscosity showed the highest value for SPC, and membrane rigidity increased with increasing pH. The entrapment efficiency of liposomes with reference to curcumin was as follows: DPPC>DPPC+DPPG>DPPG>SPC. Sustained release of curcumin was observed for all liposomes. Curcumin-loaded liposomes exhibited substantial antibacterial activity against the gram-positive bacteria Bacillus amyloliquefaciens. Additional studies are needed to improve the understanding of the effect of formulation variables on the physicochemical stability of liposomes.
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Affiliation(s)
- Biplab Roy
- Department of Chemistry and Chemical Technology, Vidyasagar University
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Bhattarai R, Sutradhar T, Roy B, Guha P, Chettri P, Mandal AK, Bykov AG, Akentiev AV, Noskov BA, Panda AK. Double-Tailed Cystine Derivatives as Novel Substitutes of Phospholipids with Special Reference to Liposomes. J Phys Chem B 2016; 120:10744-10756. [PMID: 27659807 DOI: 10.1021/acs.jpcb.6b06413] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ravi Bhattarai
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, West Bengal, India
| | - Tanushree Sutradhar
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, West Bengal, India
| | - Biplab Roy
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, West Bengal, India
| | - Pritam Guha
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, West Bengal, India
| | - Priyam Chettri
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, West Bengal, India
| | | | - Alexey G. Bykov
- Department
of Colloid Chemistry, St. Petersburg State University, Universitetskii
pr. 26, 198504 St.
Petersburg, Russia
| | - Alexander V. Akentiev
- Department
of Colloid Chemistry, St. Petersburg State University, Universitetskii
pr. 26, 198504 St.
Petersburg, Russia
| | - Boris A. Noskov
- Department
of Colloid Chemistry, St. Petersburg State University, Universitetskii
pr. 26, 198504 St.
Petersburg, Russia
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Nahak P, Karmakar G, Chettri P, Roy B, Guha P, Besra SE, Soren A, Bykov AG, Akentiev AV, Noskov BA, Panda AK. Influence of Lipid Core Material on Physicochemical Characteristics of an Ursolic Acid-Loaded Nanostructured Lipid Carrier: An Attempt To Enhance Anticancer Activity. Langmuir 2016; 32:9816-25. [PMID: 27588340 DOI: 10.1021/acs.langmuir.6b02402] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The impact of saturation and unsaturation in the fatty acyl hydrocarbon chain on the physicochemical properties of nanostructured lipid carriers (NLCs) was investigated to develop novel delivery systems loaded with an anticancer drug, ursolic acid (UA). Aqueous NLC dispersions were prepared by a high-pressure homogenization-ultrasonication technique with Tween 80 as a stabilizer. Mutual miscibility of the components at the air-water interface was assessed by surface pressure-area measurements, where attractive interactions were recorded between the lipid mixtures and UA, irrespective of the extent of saturation or unsaturation in fatty acyl chains. NLCs were characterized by combined dynamic light scattering, transmission electron microscopy (TEM), atomic force microscopy (AFM), differential scanning calorimetry, drug encapsulation efficiency, drug payload, in vitro drug release, and in vitro cytotoxicity studies. The saturated lipid-based NLCs were larger than unsaturated lipids. TEM and AFM images revealed the spherical and smooth surface morphology of NLCs. The encapsulation efficiency and drug payload were higher for unsaturated lipid blends. In vitro release studies indicate that the nature of the lipid matrix affects both the rate and release pattern. All UA-loaded formulations exhibited superior anticancer activity compared to that of free UA against human leukemic cell line K562 and melanoma cell line B16.
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Affiliation(s)
- Prasant Nahak
- Department of Chemistry, University of North Bengal , Darjeeling 734 013, West Bengal, India
| | - Gourab Karmakar
- Department of Chemistry, University of North Bengal , Darjeeling 734 013, West Bengal, India
| | - Priyam Chettri
- Department of Biotechnology, University of North Bengal , Darjeeling 734 013, West Bengal, India
| | - Biplab Roy
- Department of Chemistry, University of North Bengal , Darjeeling 734 013, West Bengal, India
| | - Pritam Guha
- Department of Chemistry, University of North Bengal , Darjeeling 734 013, West Bengal, India
| | - Shila Elizabeth Besra
- Cancer Biology and Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology , 4, Raja S. C. Mullick Road, Kolkata 700032,West Bengal, India
| | - Anjana Soren
- Cancer Biology and Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology , 4, Raja S. C. Mullick Road, Kolkata 700032,West Bengal, India
| | - Alexey G Bykov
- Department of Colloid Chemistry, St. Petersburg State University , Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Alexander V Akentiev
- Department of Colloid Chemistry, St. Petersburg State University , Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Boris A Noskov
- Department of Colloid Chemistry, St. Petersburg State University , Universitetsky pr. 26, 198504 St. Petersburg, Russia
| | - Amiya Kumar Panda
- Department of Chemistry and Chemical Technology, Vidyasagar University , Midnapore 721 102, West Bengal, India
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Karmakar G, Nahak P, Guha P, Roy B, Chettri P, Sapkota M, Koirala S, Misono T, Torigoe K, Ghosh S, Panda AK. Effects of Fatty Acids on the Interfacial and Solution Behavior of Mixed Lipidic Aggregates Called Solid Lipid Nanoparticles. J Oleo Sci 2016; 65:419-30. [DOI: 10.5650/jos.ess15234] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Gourab Karmakar
- Department of Chemistry and Chemical Technology, Vidyasagar University
| | - Prasant Nahak
- Department of Chemistry and Chemical Technology, Vidyasagar University
| | - Pritam Guha
- Department of Chemistry and Chemical Technology, Vidyasagar University
| | - Biplab Roy
- Department of Chemistry and Chemical Technology, Vidyasagar University
| | | | - Manish Sapkota
- Department of Pharmaceutics, Himalayan Pharmacy Institute
| | - Suraj Koirala
- Department of Pharmaceutics, Himalayan Pharmacy Institute
| | - Takeshi Misono
- Department of Pure and Applied Chemistry, Tokyo University of Science
| | - Kanjiro Torigoe
- Department of Pure and Applied Chemistry, Tokyo University of Science
| | - Shilpi Ghosh
- Department of Biotechnology, University of North Bengal
| | - Amiya Kumar Panda
- Department of Chemistry and Chemical Technology, Vidyasagar University
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Koirala S, Roy B, Guha P, Bhattarai R, Sapkota M, Nahak P, Karmakar G, Mandal AK, Kumar A, Panda AK. Effect of double tailed cationic surfactants on the physicochemical behavior of hybrid vesicles. RSC Adv 2016. [DOI: 10.1039/c5ra17774j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Hydrodynamic and thermal behavior of vesicles along with the proposed models.
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Affiliation(s)
- Suraj Koirala
- Department of Pharmaceutics
- Himalayan Pharmacy Institute
- India
| | - Biplab Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Pritam Guha
- Department of Microbiology
- Vidyasagar University
- Midnapore-721102
- India
| | - Ravi Bhattarai
- Department of Pharmaceutics
- Himalayan Pharmacy Institute
- India
| | - Manish Sapkota
- Department of Pharmaceutics
- Himalayan Pharmacy Institute
- India
| | - Prasant Nahak
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Gourab Karmakar
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Amit Kumar Mandal
- Department of Microbiology
- Vidyasagar University
- Midnapore-721102
- India
| | - Anoop Kumar
- Department of Biotechnology
- University of North Bengal
- Darjeeling-734013
- India
| | - Amiya Kumar Panda
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
- Department of Chemistry and Chemical Technology
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Guha P, Stovall DW, Guerette NL. The Utility of Near-Infrared Florescence Imaging in Robotic-Assisted Sacrocolpopexy (RASC). J Minim Invasive Gynecol 2015; 22:S13. [DOI: 10.1016/j.jmig.2015.08.039] [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: 12/01/2022]
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21
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Guha P, Roy B, Karmakar G, Nahak P, Koirala S, Sapkota M, Misono T, Torigoe K, Panda AK. Ion-pair amphiphile: a neoteric substitute that modulates the physicochemical properties of biomimetic membranes. J Phys Chem B 2015; 119:4251-62. [PMID: 25715819 DOI: 10.1021/jp512212u] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Ion-pair amphiphiles (IPAs) are neoteric pseudo-double-tailed compounds with potential as a novel substitute of phospholipid. IPA, synthesized by stoichiometric/equimolar mixing of aqueous solution of hexadecyltrimethylammonium bromide (HTMAB) and sodium dodecyl sulfate (SDS), was used as a potential substituent of naturally occurring phospholipid, soylecithin (SLC). Vesicles were prepared using SLC and IPA in different ratios along with cholesterol. The impact of IPA on SLC was examined by way of surface pressure (π)-area (A) measurements. Associated thermodynamic parameters were evaluated; interfacial miscibility between the components was found to depend on SLC/IPA ratio. Solution behavior of the bilayers, in the form of vesicles, was investigated by monitoring the hydrodynamic diameter, zeta potential, and polydispersity index over a period of 100 days. Size and morphology of the vesicles were also investigated by electron microscopic studies. Systems comprising 20 and 40 mol % IPA exhibited anomalous behavior. Thermal behavior of the vesicles, as scrutinized by differential scanning calorimetry, was correlated with the hydrocarbon chain as well as the headgroup packing. Entrapment efficiency (EE) of the vesicles toward the cationic dye methylene blue (MB) was also evaluated. Vesicles were smart enough to entrap the dye, and the efficiency was found to vary with IPA concentration. EE was found to be well above 80% for some stable dispersions. Such formulations thus could be considered to have potential as novel drug delivery systems.
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Affiliation(s)
- Pritam Guha
- †Department of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Biplab Roy
- †Department of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Gourab Karmakar
- †Department of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Prasant Nahak
- †Department of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
| | - Suraj Koirala
- ‡Department of Pharmaceutics, Himalayan Pharmacy Institute, Majhitar, Rangpo, East Sikkim 737136, India
| | - Manish Sapkota
- ‡Department of Pharmaceutics, Himalayan Pharmacy Institute, Majhitar, Rangpo, East Sikkim 737136, India
| | - Takeshi Misono
- §Department of Pure and Applied Chemistry, Tokyo University of Science, 2641 Yamazaki, Noda, Tokyo 278-8510, Japan
| | - Kanjiro Torigoe
- §Department of Pure and Applied Chemistry, Tokyo University of Science, 2641 Yamazaki, Noda, Tokyo 278-8510, Japan
| | - Amiya Kumar Panda
- †Department of Chemistry, University of North Bengal, Darjeeling 734 013, West Bengal, India
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Nahak P, Karmakar G, Roy B, Guha P, Sapkota M, Koirala S, Chang CH, Panda AK. Physicochemical studies on local anaesthetic loaded second generation nanolipid carriers. RSC Adv 2015. [DOI: 10.1039/c4ra16434b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Effect of drug concentration on different properties of NLC.
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Affiliation(s)
- Prasant Nahak
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Gourab Karmakar
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Biplab Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Pritam Guha
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
| | - Manish Sapkota
- Department of Pharmaceutics
- Himalayan Pharmacy Institute
- India
| | - Suraj Koirala
- Department of Pharmaceutics
- Himalayan Pharmacy Institute
- India
| | - Chien-Hsiang Chang
- Department of Chemical Engineering
- National Cheng Kung University
- Tianan
- Taiwan
| | - Amiya Kumar Panda
- Department of Chemistry
- University of North Bengal
- Darjeeling-734013
- India
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23
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Sapkota M, Karmakar G, Nahak P, Guha P, Roy B, Koirala S, Chettri P, Das K, Misono T, Torigoe K, Panda AK. Effect of polymer charge on the formation and stability of anti-inflammatory drug loaded nanostructured lipid carriers: physicochemical approach. RSC Adv 2015. [DOI: 10.1039/c5ra11066a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Proposed model of NSAID-loaded and polymer-coated NLC along with its size dependence ( ), PDI ( ), release rate ( ), and absorption maxima ( ) as well as its morphology and antibacterial activity.
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Affiliation(s)
- Manish Sapkota
- Department of Pharmaceutics
- Himalayan Pharmacy Institute
- Majhitar, Rangpo
- India
| | - Gourab Karmakar
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
| | - Prasant Nahak
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
| | - Pritam Guha
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
| | - Biplab Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
| | - Suraj Koirala
- Department of Pharmaceutics
- Himalayan Pharmacy Institute
- Majhitar, Rangpo
- India
| | - Priyam Chettri
- Department of Biotechnology
- University of North Bengal
- Darjeeling – 734013
- India
| | - Kalipada Das
- Department of Chemistry
- Bose Institute
- Kolkata 700009
- India
| | - Takeshi Misono
- Department of Pure and Applied Chemistry
- Tokyo University of Science
- Tokyo 278-8510
- Japan
| | - Kanjiro Torigoe
- Department of Pure and Applied Chemistry
- Tokyo University of Science
- Tokyo 278-8510
- Japan
| | - Amiya Kumar Panda
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
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Guha P, Bhattacharjee S, Chaudhuri TK. Diversity of killer cell immunoglobulin-like receptor genes in the Bengali population of northern West Bengal, India. Scand J Immunol 2014; 80:441-51. [PMID: 25205074 DOI: 10.1111/sji.12239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 08/06/2014] [Indexed: 11/26/2022]
Abstract
The Indian Subcontinent exhibits extensive diversity in its culture, religion, ethnicity and linguistic heritage, which symbolizes extensive genetic variations within the populations. The highly polymorphic Killer cell Immunoglobulin-like Receptor (KIR) family plays an important role in tracing genetic differentiation in human population. In this study, we aimed to analyse the KIR gene polymorphism in the Bengali population of northern West Bengal, India. To our knowledge, this is the first report on the KIR gene polymorphism in the Bengalis of West Bengal, India. Herein, we have studied the distribution of 14 KIR genes (KIR3DL1-3DL3, KIR2DL1-2DL5, KIR2DS1-2DS5 AND KIR3DS1) and two pseudogenes (KIR3DP1 and 2DP1) in the Bengalis. Apart from the framework genes (KIR2DL4, 3DL2, 3DL3 and 3DP1), which are present in all the individuals, the gene frequencies of other KIR genes varied between 0.34 and 0.88. Moreover, upon comparing the KIR polymorphism of the Bengalis with the available published data of other world populations, it has been found that the Indo-European-speaking Bengalis from the region share both Dravidian and Indo-Aryan gene pool with considerable influences of mongoloid and European descents. Furthermore, evidences from previously published data on human leucocyte antigen and Y-chromosome haplogroup diversity support the view. Our results will help to understand the genetic background of the Bengali population, in illustrating the population migration events in the eastern and north-eastern part of India, in explaining the extensive genetic admixture amongst the different linguistic groups of the region and also in KIR-related disease researches.
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Affiliation(s)
- P Guha
- Cellular Immunology Laboratory, Department of Zoology, University of North Bengal, Siliguri, India
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Moulick A, Jana A, Sarkar N, Guha P, Mahapatra C, Lallawmzuala K. Non pitting edema, arthritis and ichthyosis; presenting manifestation of leprosy. Indian J Lepr 2013; 85:83-86. [PMID: 24236367] [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: 06/02/2023]
Abstract
Leprosy is a chronic granulomatous infection caused by Mycobacterium leprae. Predominantly involving skin and nerves and having classic clinical description, the diagnosis may be clear-cut in majority of patients but may be challenging in others. Non-pitting edema, ichthyosis and arthritis are uncommon in leprosy and very rare in tuberculoid type where the diagnosis may be challenging unlike relatively clear-cut clinical picture in lepromatous type. Musculoskeletal manifestation is seen in 1-5% of cases and usually associated with reactional states where again the diagnosis sometimes becomes evident. High index of suspicion is therefore recommended in patients with unexplained systemic illness especially in endemic areas. Herein we report a young male with non pitting edema and symmetric peripheral arthritis involving all four limbs, and ichthyosis as presenting manifestation of borderline leprosy where the neuro-cutaneous manifestation developed two months after the said presenting features and in absence of a reactional state.
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Affiliation(s)
- A Moulick
- Department of Medicine, Calcutta National Medical College, 24 Gorachand Road, Kolkata-700014, India.
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Datta D, Chattopadhyay RN, Guha P. Community based mangrove management: a review on status and sustainability. J Environ Manage 2012; 107:84-95. [PMID: 22595074 DOI: 10.1016/j.jenvman.2012.04.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Revised: 03/22/2012] [Accepted: 04/09/2012] [Indexed: 05/31/2023]
Abstract
Community Based Mangrove Management (CBMM) has been advocated by both academia and governing agencies as a viable alternative for sustainably managing the ecologically important mangrove forests which are disappearing rapidly worldwide. Drawing insights from diverse sustainability issues, capabilities and performances of worldwide CBMM initiatives were examined in this paper. Higher numbers of CBMM initiatives were reported from South Asia and lesser from South America and Africa. Identification of the causes of degradation at a site and use-specific zonal replantations with respect to species associations were identified as major criteria of ecological sustainability. Regarding economic sustainability, transformation of potential uses of mangroves known by local communities into actual ones was found to be necessary. Proper disbursement of accrued benefits among community members irrespective of their socio-cultural status is also a major concern. Restructuring of CBMM institutions by ensuring participation of subsistence based users in decision-making and resource sharing have been identified as a prime determinant of institutional sustainability. However, limited number of studies on socio-political and institutional aspects as well as impacts of globalization induced socio-cultural transformations of communities on CBMM had been actually found. More focused researches on these aspects had been recommended for better community management of these highly stressed forests.
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Affiliation(s)
- Debajit Datta
- Department of Agricultural and Food Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.
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Guha P, Dey A, Chatterjee A, Chattopadhyay S, Bandyopadhyay SK. Pro-ulcer effects of resveratrol in mice with indomethacin-induced gastric ulcers are reversed by L-arginine. Br J Pharmacol 2010; 159:726-34. [PMID: 20067468 DOI: 10.1111/j.1476-5381.2009.00572.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [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] Open
Abstract
BACKGROUND AND PURPOSE Although resveratrol is currently being evaluated in pre-clinical studies as a potential cancer chemopreventive agent and cardiovascular stress-releasing compound, treatment with resveratrol severely delays healing of pre-existing gastric ulcers. Resveratrol treatment can also induce endothelial NOS (eNOS) expression. Here, we have attempted to modulate NO production via eNOS in order to alleviate the pro-ulcer effects of resveratrol. EXPERIMENTAL APPROACH Gastric ulcers were induced in mice with a single dose of indomethacin. The effects of pretreatment with l-arginine on the pro-ulcer effects of resveratrol in these mice were then assessed. We measured ulcer damage scores (DS), myeloperoxidase (MPO) activity, generation of prostaglandin E(2) (PGE(2)) and NO, along with a gene expression study. KEY RESULTS Resveratrol significantly aggravated damage from indomethacin-induced gastric ulcers, and delayed healing, as shown by increased DS and MPO activity. The mRNA for cyclooxygenase (COX)-1, but not that for COX-2, was inhibited by resveratrol treatment, with reduced synthesis of PGE(2) by gastric tissue. However, resveratrol treatment induced eNOS gene expression and shifted the eNOS/iNOS balance. l-Arginine given before resveratrol in mice with indomethacin-induced ulcers significantly increased tissue NO synthesis and improved ulcer healing. CONCLUSIONS AND IMPLICATIONS Exogenous l-arginine increased NO formation via raised levels of eNOS induced by resveratrol and protected against the pro-ulcer effects of resveratrol. Therefore, l-arginine might be useful for alleviation of the pro-ulcer side effects of resveratrol in patients.
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Affiliation(s)
- P Guha
- Department of Biochemistry, Dr. B.C. Roy Post Graduate Institute of Basic Medical Sciences & IPGME&R, Kolkata, India
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Majumder N, Bhattacharjee S, Bhattacharyya Majumdar S, Dey R, Guha P, Pal NK, Majumdar S. Restoration of impaired free radical generation and proinflammatory cytokines by MCP-1 in mycobacterial pathogenesis. Scand J Immunol 2008; 67:329-39. [PMID: 18282229 DOI: 10.1111/j.1365-3083.2008.02070.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mycobacterium tuberculosis exerts its pathogenic effects mainly via its cell wall glycolipid called Mannosylated Lipoarabinomannan (Man-LAM), which subverts the cellular inflammatory responses by the suppression of superoxide anion generation in earlier hours, and nitric oxide (NO) generation at later hours of pathogenic invasion. In this paper, we have shown the prophylactic effect of C-C chemokines, both in vitro and in vivo. Exogenous administration of C-C chemokines, particularly monocyte chemoattractant protein (MCP)-1, led to the induction of superoxide anion generation via the restoration of impaired protein kinase C (PKC) signalling in Man-LAM-treated macrophages. Monocyte chemoattractant protein-1 could also potently induce NO generation by upregulation of the proinflammatory cytokines tumour necrosis factor-alpha and interleukin-12 from Man-LAM-treated macrophages accompanied by inhibition of anti-inflammatory responses. Our in vivo observations clearly exhibited effective restoration of impaired PKC signalling as well as proinflammatory cytokine expression by MCP-1 in Man-LAM treated as well as M. tuberculosis H37Rv-infected C57BL/6 mice. We also observed, as direct evidence, that MCP-1 induced a significant reduction of the number of viable tubercle bacilli in the lungs and spleen of infected mice. Collectively, our findings strongly suggest the effectiveness of MCP-1 as a potent immunoprophylactic tool for controlling the mycobacterial establishment within the host.
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Affiliation(s)
- N Majumder
- Department of Microbiology, Bose Institute, Kolkata, India.
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Bloomfield JP, Williams RJ, Gooddy DC, Cape JN, Guha P. Impacts of climate change on the fate and behaviour of pesticides in surface and groundwater--A UK perspective. Sci Total Environ 2006; 369:163-77. [PMID: 16914182 DOI: 10.1016/j.scitotenv.2006.05.019] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2006] [Revised: 04/18/2006] [Accepted: 05/25/2006] [Indexed: 05/11/2023]
Abstract
Over the last two decades significant effort has been dedicated to understanding the fate and transport of pesticides in surface water and groundwater and to use this understanding in the development of environmental policy and regulation. However, there have been few studies that have investigated the relationships between pesticides and climate change, and where this work has been undertaken it has principally been in relation to the impacts of climate change on agricultural production rather than in the context of environmental protection. This study addresses that gap by reviewing how climate change may impact the fate and transport of pesticides in surface and groundwaters as a pre-cursor to quantitative studies. In order to structure the review, we have adopted a source-pathway-receptor approach where climate sensitivities of pesticide source terms, environmental pathways and receptors are reviewed. The main climate drivers for changing pesticide fate and behaviour are thought to be changes in rainfall seasonality and intensity and increased temperatures, but the effect of climate change on pesticide fate and transport is likely to be very variable and difficult to predict. In the long-term, indirect impacts, such as land-use change driven by changes in climate, may have a more significant effect on pesticides in surface and groundwaters than the direct impacts of climate change on pesticide fate and transport. The review focuses on climate change scenarios and case studies from the UK; however, the general conclusions can be applied more widely.
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Affiliation(s)
- J P Bloomfield
- Maclean Building, British Geological Survey, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK.
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Guha P, Nizamie HS. Refractory schizophrenia, clozapine and epilepsy : management strategies. Indian J Psychiatry 1998; 40:84-6. [PMID: 21494450 PMCID: PMC2964825] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
This case of refractory schizophrenia in a 28 year old male showed significant improvement with clozapine. But therapeutic doses of clozapine were associated with generalised tonic clonic seizures (GTCS). Addition of sodium valproate allowed adequate control of schizophrenic symptoms as well as seizures. EEG abnormality correlated surprisingly well with development of GTCS and subsequent improvement with anticonvulsant. Factors that lead to seizure-vulnerability in clozapine treated patients are discussed.
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Affiliation(s)
- P Guha
- PRATHAMA GUHA, M.D., Resident, Central Institute of Psychiatry, Ranchi - 834006
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Chakraborty B, Chakraborty S, Guha P, Ghosh KK, Pal SK. Prolactin and cortisol in hypoalbuminemia. Indian Pediatr 1980; 17:875-7. [PMID: 6788691] [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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Chakrabarty BK, Chakrabarty S, Ghosh TK, Guha P. Observation of 50 cases of purpura in childhood. Indian J Dermatol 1980; 25:13-8. [PMID: 7251066] [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: 01/24/2023] Open
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Pelc B, Marshall DH, Guha P, Khan MY, Nordin BE. The relation between plasma androstenedione, plasma oestrone and androstenedione to oestrone conversion rates in post-menopausal women with and without fractures. Clin Sci Mol Med 1978; 54:125-31. [PMID: 620501 DOI: 10.1042/cs0540125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
1. Plasma androstenedione, plasma oestrone and the conversion of plasma androstenedione into oestrone were measured in 19 post-menopausal women without fractures (six of them oophorectomized) and 18 with vertebral or femoral neck fractures (four of them oophorectomized). 2. In the series as a whole, the main determinant of the plasma oestrone level was the plasma androstenedione concentration. Only in the small oophorectomized group did the variation in conversion rate make a significant contribution to the variation in plasma oestrone. 3. The conversion rates were not different as between non-fracture and fracture cases but the mean plasma androstenedione and oestrone concentrations were lower (though not significantly) in the latter.
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Marshall DH, Gallagher JC, Guha P, Hanes F, Oldfield W, Nordin BE. The effect of 1alpha-hydroxycholecalciferol and hormone therapy on the calcium balance of post-menopausal osteoporosis. Calcif Tissue Res 1977; 22 Suppl:78-84. [PMID: 334349 DOI: 10.1007/bf02064045] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Guha P, Bhattacherjee AK. Abnormal haemoglobins in a coal miner and his family. J Indian Med Assoc 1971; 57:204-6. [PMID: 5128805] [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: 01/13/2023]
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