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Prasanth VG, Rathore RS, Pathak M, Sathiyanarayanan KI. Fluorescent aluminum chelate complexes as modified precursors for nano-structured alumina. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1279280] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Pathak M, Mandal GP, Patra AK, Samanta I, Pradhan S, Haldar S. Effects of dietary supplementation of cinnamaldehyde and formic acid on growth performance, intestinal microbiota and immune response in broiler chickens. ANIMAL PRODUCTION SCIENCE 2017. [DOI: 10.1071/an15816] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
An experiment was conducted to investigate the effects of replacing antibiotic growth promoter (AGP) with a combination of essential oil and organic acids (EO + OA) on growth performance, gut microbiota and immune response in broiler chickens. In Experiment 1, 320 day-old broiler chicks were randomly distributed to 32 pens with 10 birds in each pen and the pens were equally allotted to four treatment groups. In Experiment 2, 120 day-old chicks were divided into the same four treatment groups, each group containing three replicated pens with 10 birds in each pen. The groups were (1) Negative Control (NC) without AGP or other growth-promoting feed additives; (2) AGP (NC + enramycin; 125 mg/kg feed; (3) OA (NC + OA; 500 mg/kg feed); and (4) EO + OA (NC + a combination of cinnamaldehyde and calcium formate; 500 mg/kg feed). Experiment 1 lasted for 40 days, whereas Experiment 2 continued for 28 days. In Experiment 2, all birds were orally challenged with Escherichia coli (108 bacteria/bird) on Day 14. Overall intake, growth and feed conversion ratio (FCR) on Day 40 had no difference (P > 0.05) among the groups in Experiment 1. In Experiment 2, growth, feed intake and FCR were not affected by any dietary treatments until Day 14, but after being challenged with E. coli, bodyweight gain and FCR improved (P < 0.05) for AGP and EO + OA compared with NC. Mortality rate was also lower (P < 0.05) for AGP and EO + OA than NC in Experiment 2. Villi height was higher (P < 0.001) in OA and EO + OA groups compared with NC and AGP groups. Any treatment did not affect (P > 0.05) the counts of total bacteria, E. coli and Lactobacillus in the contents of ileum and caecum. However, Salmonella counts in the ileal and caecal contents decreased (P < 0.001) for AGP, OA and EO + OA compared with NC group. Clostridium counts were lower for EO + OA group than for NC and AGP groups in the ileum, and for AGP, OA and EO + OA groups than for NC in the caeca (P < 0.05). Antibody titer on Day 35 against Newcastle disease vaccine was higher in EO + OA group than in NC, AGP and OA groups (P < 0.001). In conclusion, EO + OA did not affect growth and FCR in broilers. However, AGP and EO + AO improved growth performance and FCR after being challenged with E. coli. Moreover, EO + OA was effective in reducing the Clostridium count in the small intestine and caecum and increasing the villus height and antibody titer against Newcastle disease vaccine.
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Kalita S, Pathak M, Devi G, Sarma HP, Bhattacharyya KG, Sarma A, Devi A. Utilization of Euryale ferox Salisbury seed shell for removal of basic fuchsin dye from water: equilibrium and kinetics investigation. RSC Adv 2017. [DOI: 10.1039/c7ra03014b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Euryale ferox Salisbury (E. ferox) is an environmentally and economically important wetland macrophyte.
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Tummalapalli K, C. S. V, Munusami P, Pathak M, M. M. B. Synthesis, characterization and biological applications of new copper(II) complexes of aryl hydrazones. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3680] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Tummalapalli K, C S V, Munusami P, Pathak M, M M B. Evaluation of DNA/Protein interactions and cytotoxic studies of copper(II) complexes incorporated with N, N donor ligands and terpyridine ligand. Int J Biol Macromol 2016; 95:1254-1266. [PMID: 27838416 DOI: 10.1016/j.ijbiomac.2016.11.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 11/02/2016] [Accepted: 11/03/2016] [Indexed: 12/23/2022]
Abstract
A series of four new copper(II) heteroleptic complexes, [Cu(2‴-pytpy) (L)] (NO3)2·2H2O (1-4), where 2‴-pytpy=4'-(2'''-Pyridyl)-2, 2':6', 2''-terpyridine, L=bipyridyl (bpy), 1, 10 phenanthroline(phen), dipyridoquinoxaline(dpq) and dipyridophenazine (dppz) were synthesized and characterized by spectroscopic techniques. Further, the molecular structure of the complex (2) was confirmed by single crystal X-ray diffraction technique and the data revealed a penta coordinated, distorted square-pyramidal geometry with triclinic system. The interactions of four complexes with calf thymus DNA and bovine serum albumin (BSA) were investigated by electronic absorption, fluorescence and circular dichroism spectroscopy techniques. Spectral studies substantiated an intercalative binding mode of metal complexes with ct-DNA. Significant binding interactions of the complexes with protein have been further revealed from fluorescence studies. Furthermore, all the four complexes show potential cytotoxicity towards the human liver carcinoma cell line (HepG-2).
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Pathak M, Olstad O, Drolsum L, Moe M, Katerina J, Nicolaissen B, Noer A. The effect of culture medium and carrier on explant culture of human limbal epithelium: a comparison of ultrastructure, keratin profile and gene expression. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Reddy BN, Reddy PVG, Reddy BRP, Reddy SRS, Reddy SM, Pathak M. Novel 7-Nitro-1-(Piperidin-4-yl)-4,5-Dihydro-[1,2,4] Triazolo[4,3-a]Quinoline-Sulphonamide Derivatives as Antimicrobial Agents: Design, Synthesis, and Bio-Activity. J Heterocycl Chem 2016. [DOI: 10.1002/jhet.2439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Bhoriwal S, Sultania M, Kumar S, Deo S, Shukla N, Pandey D, Sharma A, Sahoo R, Pathy S, Thulkar S, Pathak M. RM-063 Neoadjuvant chemotherapy for unresectable carcinoma gall bladder: our experience. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw201.59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Reddy BN, Rani CR, Reddy SM, Pathak M. An efficient and green La(OTf)3 catalyzed Petasis borono–Mannich reaction for the synthesis of tertiary amines. RESEARCH ON CHEMICAL INTERMEDIATES 2016. [DOI: 10.1007/s11164-016-2551-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Vuppalapati GP, Rathore RS, Pathak M, Kulathu Iyer S. Hepta-coordinated heteroleptic derivatives of zirconium(IV): Synthesis, structural characterization and ring opening polymerization of ε-caprolactone. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.01.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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36
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Kiran T, Prasanth VG, Balamurali M, Vasavi C, Munusami P, Sathiyanarayanan KI, Pathak M. Synthesis, spectroscopic characterization and in vitro studies of new heteroleptic copper (II) complexes derived from 2-hydroxy napthaldehyde Schiff’s bases and N, N donor ligands: Antimicrobial, DNA binding and cytotoxic investigations. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.04.033] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Giri Prasanth V, Kiran T, Gopal Aravindan P, Iyer Sathiyanarayanan K, Pathak M. Synthesis, structural, and ε-caprolactone polymerization studies of heteroleptic derivatives of aluminum(III). J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1042875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Pathak M, Wilmann P, Awford J, Li C, Hamad BK, Fischer PM, Dreveny I, Dekker LV, Emsley J. Coagulation factor XII protease domain crystal structure. J Thromb Haemost 2015; 13:580-91. [PMID: 25604127 PMCID: PMC4418343 DOI: 10.1111/jth.12849] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 01/12/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND Coagulation factor XII is a serine protease that is important for kinin generation and blood coagulation, cleaving the substrates plasma kallikrein and FXI. OBJECTIVE To investigate FXII zymogen activation and substrate recognition by determining the crystal structure of the FXII protease domain. METHODS AND RESULTS A series of recombinant FXII protease constructs were characterized by measurement of cleavage of chromogenic peptide and plasma kallikrein protein substrates. This revealed that the FXII protease construct spanning the light chain has unexpectedly weak proteolytic activity compared to β-FXIIa, which has an additional nine amino acid remnant of the heavy chain present. Consistent with these data, the crystal structure of the light chain protease reveals a zymogen conformation for active site residues Gly193 and Ser195, where the oxyanion hole is absent. The Asp194 side chain salt bridge to Arg73 constitutes an atypical conformation of the 70-loop. In one crystal form, the S1 pocket loops are partially flexible, which is typical of a zymogen. In a second crystal form of the deglycosylated light chain, the S1 pocket loops are ordered, and a short α-helix in the 180-loop of the structure results in an enlarged and distorted S1 pocket with a buried conformation of Asp189, which is critical for P1 Arg substrate recognition. The FXII structures define patches of negative charge surrounding the active site cleft that may be critical for interactions with inhibitors and substrates. CONCLUSIONS These data provide the first structural basis for understanding FXII substrate recognition and zymogen activation.
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Pathak M, Devi A, Bhattacharyya KG, Sarma HK, Subudhi S, Lal B. Production of a non-cytotoxic bioflocculant by a bacterium utilizing a petroleum hydrocarbon source and its application in heavy metal removal. RSC Adv 2015. [DOI: 10.1039/c5ra08636a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A bacterium isolated from the activated sludge of an oil refinery of Assam, India retained efficient bioflocculating activity through production of the bioflocculant when it was grown on a crude oil amended medium void of any other carbon source.
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Samuel B, Ethiraj KR, Pathak M. Moisture stable heteroleptic titanium (IV) complexes derived from 8-hydroxyquinoline: synthesis, antibacterial, and antifungal studies. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1234-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Manjula Dhevi D, Prabu AA, Pathak M. Miscibility, crystallization and annealing studies of poly(vinylidene fluoride)/hyperbranched polyester blends. POLYMER 2014. [DOI: 10.1016/j.polymer.2013.12.048] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Manjula Dhevi D, Jaisankar S, Pathak M. Effect of new hyperbranched polyester of varying generations on toughening of epoxy resin through interpenetrating polymer networks using urethane linkages. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.06.041] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Samuel B, Tummalapalli K, Giri PV, Pathak M. Novel heteroleptic complexes of titanium(IV) derived from 2-hydroxyacetophenone: synthesis, characterization, antibacterial and molecular docking studies. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0660-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pathak M, Wong SS, Dreveny I, Emsley J. Structure of plasma and tissue kallikreins. Thromb Haemost 2013; 110:423-33. [PMID: 23494059 DOI: 10.1160/th12-11-0840] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 02/27/2013] [Indexed: 12/14/2022]
Abstract
The kallikrein kinin system (KKS) consists of serine proteases involved in the production of peptides called kinins, principally bradykinin and Lys-bradykinin (kallidin). The KKS contributes to a variety of physiological processes including inflammation, blood pressure control and coagulation. Here we review the protein structural data available for these serine proteases and examine the molecular mechanisms of zymogen activation and substrate recognition focusing on plasma kallikrein (PK) and tissue kallikrein (KLK1) cleavage of kininogens. PK circulates as a zymogen bound to high-molecular-weight kininogen (HK). PK is activated by coagulation factor XIIa and then cleaves HK to generate bradykinin and factor XII to generate further XIIa.A structure has been described for the activated PK protease domain in complex with the inhibitor benzamidine. Kallikrein-related peptidases (KLKs) have a distinct domain structure and exist as a family of 15 genes which are differentially expressed in many tissues and the central nervous system.They cleave a wide variety of substrates including low-molecular-weight kininogen (LK) and matrix proteins. Crystal structures are available for KLK1, 3, 4, 5, 6 and 7 activated protease domains typically in complex with S1 pocket inhibitors. A substrate mimetic complex is described for KLK3 which provides insight into substrate recognition. A zymogen crystal structure determined for KLK6 reveals a closed S1 pocket and a novel mechanism of zymogen activation. Overall these structures have proved highly informative in understanding the molecular mechanisms of the KKS and provide templates to design inhibitors for treatment of a variety of diseases.
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Lank P, Pathak M, Crandall M. 325 Outcomes for Older Trauma Patients With Positive Drug or Alcohol Screens in the Emergency Department. Ann Emerg Med 2011. [DOI: 10.1016/j.annemergmed.2011.06.356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pathak M, Deshpande A, Mirashe PK, Sorte RB, Ojha A. Ambient air quality monitoring during the H1N1 influence period in Pune (India). JOURNAL OF ENVIRONMENTAL SCIENCE & ENGINEERING 2010; 52:291-298. [PMID: 22312797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Ambient air quality in an urban area is directly linked with activity level in the city including transport, business and industrial activities. Maharashtra Pollution Control Board (MPCB) has established an ambient air quality network in the city including state-of-the-art continuous air quality monitoring stations which indicate short duration air quality variations for criteria and non-criteria pollutants. The influence of H1N1 outbreak in Pune hitting its worst pandemic condition, led the civic authorities to implement stringent isolation measures including closure of schools, colleges, business malls, cinema halls, etc. Additionally, the fear of such a pandemic brought the city to a stand still. It was therefore necessary to assess the impacts of such activity level on ambient air quality in the city. It has been observed that such events have positive impacts on air quality of the city. There was a decrease in PM concentration almost to the tune of 30 to 40% if the impacts of precipitation, i.e. seasonal variations, are taken into account. Similarly, the non criteria pollutants too showed a marked but unusual decrease in their concentrations in this ever growing city. The influence of these in turn led to lowered concentrations of secondary pollutants, i.e. O3. Overall, the ambient air quality of Pune was found to be improved during the study period.
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Aslam N, Mathew E, Pathak M, Clark J. P920 Is it appropriate for all cervical polyps to be referred to hospital? Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62406-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kumar R, Mohapatra T, Shamim SA, Pathak M, Agarwala S, Bhatnagar V. Glucagon augmented Tc99m-pertechnetate scintigraphy for detection of ectopic gastric mucosa in Meckel′s diverticulum. J Indian Assoc Pediatr Surg 2005. [DOI: 10.4103/0971-9261.16477] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Fan K, Pathak M, Zhou M, Lindner D, Borden E, Yi T. 335 SHP-1 protein tyrosine phosphatase as a target molecule in anti-tumor immune therapies: SHP-1 inhibitor SSG interacts withIL-2 to increase anti-murine renal tumor immunity. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)80342-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Pathak M, Bohra R, Mehrotra R, Lorenz IP, Piotrowski H. Synthetic Studies and Structural Aspects of Some Metallacyclic Compounds of Germanium(IV) Incorporating Nitrogen, Oxygen and Sulfur: 1. Reactions of Germanium(IV) isopropoxide with diols and crystal structure of a diolato bridged germanium(IV) compound [Ge 2(O 2C 2H 4) 4]. JOURNAL OF CHEMICAL RESEARCH 2004. [DOI: 10.3184/0308234041423808] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Germanium(IV) diolates of the type [(OPri)4-2 nGe(O-G-O) n] ( n = 1, 2) have been prepared by the reaction of Ge(OPri)4 with the corresponding diols in 1:1 and 1:2 molar ratios in anhydrous benzene. All these compounds are colourless viscous liquids except the bis(ethanediolato)germanium(IV), which is a white solid. They have been characterised by elemental analysis and IR and NMR (1H and 13C) spectroscopy. Prismatic crystals of [Ge2(O2C2H4)4] were separated out when [(OPri)2Ge(O2C2H4)] was kept for about 3 weeks at room temperature. Single crystal X-ray diffraction study indicates that it is a unique diolato bridged compound in which the geometry around the germanium atom is a distorted trigonal bipyramid of oxygen atoms which belong to one chelating diolato-O,O′ and to a second η1–O, μ2(η1–O′) bound diolato group.
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