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Elias AJ, Muralidharan K, Senthil Kumar M, Venugopalan P. Chemistry of diphenyltetrafluorophosphazene: Reactions with dilithiated diols. J Fluor Chem 2006. [DOI: 10.1016/j.jfluchem.2006.05.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kumar MS, Lakshmi V, Rajagopalan R. Occurrence of extended spectrum beta-lactamases among Enterobacteriaceae spp. isolated at a tertiary care institute. Indian J Med Microbiol 2006; 24:208-11. [PMID: 16912442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Increasing resistance to third generation cephalosporins has become a cause for concern especially among Enterobacteriaceae that cause nosocomial infections. The prevalence of extended spectrum beta-lactamases (ESBLs) among members of Enterobacteriaceae constitutes a serious threat to current beta-lactam therapy leading to treatment failure and consequent escalation of costs. A detailed study was initiated to identify the occurrence of ESBLs among the Enterobacteriaceae isolates at a tertiary care hospital using the double disk potentiation technique. Antibiogram profiles were determined to commonly used antibiotics and confirmation of ESBLs production was carried out by the disk diffusion assay using ceftazidime and cefotaxime in the presence and absence of clavulanic acid. Our results indicate that the majority of ESBLs were expressed in Escherichia coli.
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Kumar RS, Sivakumar T, Sunderam RS, Gupta M, Mazumdar UK, Gomathi P, Rajeshwar Y, Saravanan S, Kumar MS, Murugesh K, Kumar KA. Antioxidant and antimicrobial activities of Bauhinia racemosa L. stem bark. Braz J Med Biol Res 2005; 38:1015-24. [PMID: 16007272 DOI: 10.1590/s0100-879x2005000700004] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The present study was carried out to evaluate the antioxidant and antimicrobial activities of a methanol extract of Bauhinia racemosa (MEBR) (Caesalpiniaceae) stem bark in various systems. 1,1-Diphenyl-2-picryl-hydrazyl (DPPH) radical, superoxide anion radical, nitric oxide radical, and hydroxyl radical scavenging assays were carried out to evaluate the antioxidant potential of the extract. The antioxidant activity of the methanol extract increased in a concentration-dependent manner. About 50, 100, 250, and 500 microg MEBR inhibited the peroxidation of a linoleic acid emulsion by 62.43, 67.21, 71.04, and 76.83%, respectively. Similarly, the effect of MEBR on reducing power increased in a concentration-dependent manner. In DPPH radical scavenging assays the IC50 value of the extract was 152.29 microg/ml. MEBR inhibited the nitric oxide radicals generated from sodium nitroprusside with an IC50 of 78.34 microg/ml, as opposed to 20.4 microg/ml for curcumin. Moreover, MEBR scavenged the superoxide generated by the PMS/NADH-NBT system. MEBR also inhibited the hydroxyl radical generated by Fenton's reaction, with an IC50 value of more than 1000 microg/ml, as compared to 5 microg/ml for catechin. The amounts of total phenolic compounds were also determined and 64.7 microg pyrocatechol phenol equivalents were detected in MEBR (1 mg). The antimicrobial activities of MEBR were determined by disc diffusion with five Gram-positive, four Gram-negative and four fungal species. MEBR showed broad-spectrum antimicrobial activity against all tested microorganisms. The results obtained in the present study indicate that MEBR can be a potential source of natural antioxidant and antimicrobial agents.
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Gopinath D, Kumar MS, Selvaraj D, Jayakumar R. Pexiganan-incorporated collagen matrices for infected wound-healing processes in rat. J Biomed Mater Res A 2005; 73:320-31. [PMID: 15800884 DOI: 10.1002/jbm.a.30303] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The use of peptide-based drugs is limited by their rapid degradability and toxicity at high concentration during their therapeutic application. These problems could be managed by the use of a peptide delivery agent for sustained release in the site of action. Collagen is one of the most proven biomaterials of good biocompatibility with an exceptional ligand encapsulating property. In this work, we have shown that pexiganan, an antimicrobial, 22-amino-acid peptide could be incorporated and delivered to the wound-healing site against bacterial strains Pseudomonas aeruginosa and Staphylococcus aureus. The release profiles of pexiganan collagen films with different collagen concentration were studied. The release of pexiganan from 2.5% w/w of collagen film showed a sustainable activity over 72 h with effective antimicrobial concentrations. Pexiganan-incorporated collagen (PIC)-treated groups were compared with open wound (OW)- and collagen film (CF)-treated rats. PIC-treated animals showed a diminishing level of bacterial growth as compared with OW- and CF-treated animals. The biochemical parameters such as hydroxyproline, protein, DNA, uronic acid, hexosamine, SOD, and catalase content in the granulation tissue of the healing wound revealed increased proliferation of cells involved in tissue reconstruction in PIC-treated groups when compared with OW- and CF-treated groups. Furthermore, spectroscopic studies suggested that collagen structure is not perturbed by pexiganan incorporation. This study provides rationale for application of collagen membrane for antimicrobial peptide delivery in infected wounds.
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Khardenavis A, Guha PK, Kumar MS, Mudliar SN, Chakrabarti T. Activated sludge is a potential source for production of biodegradable plastics from wastewater. ENVIRONMENTAL TECHNOLOGY 2005; 26:545-52. [PMID: 15974272 DOI: 10.1080/09593332608618536] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Increased utilization of synthetic plastics caused severe environmental pollution due to their non-biodegradable nature. In the search for environmentally friendly materials to substitute for conventional plastics, different biodegradable plastics have been developed by microbial fermentations. However, limitations of these materials still exist due to high cost. This study aims at minimization of cost for the production of biodegradable plastics P(3HB) and minimization of environmental pollution. The waste biological sludge generated at wastewater treatment plants is used for the production of P(3HB) and wastewater is used as carbon source. Activated sludge was induced by controlling the carbon: nitrogen ratio to accumulate storage polymer. Initially polymer accumulation was studied by using different carbon and nitrogen sources. Maximum accumulation of polymer was observed with carbon source acetic acid and diammonium hydrogen phosphate (DAHP) as nitrogen source. Further studies were carried out to optimize the carbon: nitrogen ratios using acetic acid and DAHP. A maximum of 65.84% (w/w) P(3HB) production was obtained at C/N ratio of 50 within 96 hours of incubation.
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Abraham S, Kumar MS, Sehgal PK, Nitish S, Jayakumar ND. Evaluation of the Inhibitory Effect of Triphala on PMN-Type Matrix Metalloproteinase (MMP-9). J Periodontol 2005; 76:497-502. [PMID: 15857087 DOI: 10.1902/jop.2005.76.4.497] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND This study evaluated the inhibitory activity of triphala on PMN-type matrix metalloproteinase (MMP-9) expressed in adult periodontitis patients and compared its activity with another ayurvedic drug, kamillosan, and doxycycline, which has known inhibitory activity. METHODS Matrix metalloproteinases (MMPs) were extracted from gingival tissue samples from 10 patients (six males, four females) with chronic periodontitis. Tissue extracts were treated with the drug solutions, the inhibition was analyzed by gelatin zymography, and the percentage of inhibition was determined by a gel documentation system. RESULTS The activity of MMPs was significantly decreased with the use of the drugs. Triphala showed a 76.6% reduction of MMP-9 activity, whereas kamillosan showed a 46.36% reduction at a concentration of 1,500 microg/ml (crude extract) and doxycycline showed a 58.7% reduction at a concentration of 300 microg/ml (pure drug). CONCLUSION The present study showed the strong inhibitory activity of triphala on PMN-type MMPs involved in the extracellular matrix (ECM) degradation during periodontitis.
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Manivannan R, Kumar MS, Jawahar N, Ganesh ES, Jubie S. A comparative antimicrobial study on the essential oil of the leaves of various species of cupressus. Anc Sci Life 2005; 24:131-3. [PMID: 22557167 PMCID: PMC3330931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2004] [Accepted: 12/12/2004] [Indexed: 10/25/2022] Open
Abstract
The essential oil of leaves of various cupressus species Viz., C.glauca, C.funebris, C.lawsonia, C. macrocarpa & C. sempervirens have been studied for their antimicrobial activity against certain gram positive [B. substilis, S.aureus], gram negative [E.coli, P.aeruginesa] and fungi (A.niger, A.flavus, C.albicans & A. fumigatus) using two fold serial dilution technique. Our results revealed that, all the species possess significant antibacterial & antifungal activities.
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Laxmisha C, Thappa DM, Kumar MS, Joseph LC, Jayanthi S. Pure neural leprosy presenting with multiple nerve abscesses. INDIAN JOURNAL OF LEPROSY 2004; 76:343-50. [PMID: 16119144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
A 22-year-old male student presented to us with patchy sensory loss over the dorsum of right foot of 6 months' duration and swelling over the left index finger of 2 months' duration. Subsequently, a week later, he developed a painful swelling over the left forehead and right leg. On examination, tender soft, fluctuant subcutaneous saccular swellings were seen varying in size from 2x2 cm to 5x5 cm over the left supratrochlear, left radial cutaneous nerve, left digital nerve, right superficial peroneal nerve and left saphenous nerve. The nerves were tender and thickened above and below these cold swellings (cold nerve abscesses). Nerve biopsy of the left radial cutaneous nerve showed granulomatous infiltrate of epithelioid cells, lymphocytes and caseation necrosis of nerve. No bacilli were demonstrated with acid-fast stain. On the basis of the above findings, a diagnosis of pure neuritic leprosy (BT spectrum) in type 1 lepra reaction with multiple nerve abscesses was made. We present this case of pure neuritic leprosy exhibiting multiple nerve abscesses, for its rarity.
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Yellaboina S, Seshadri J, Kumar MS, Ranjan A. PredictRegulon: a web server for the prediction of the regulatory protein binding sites and operons in prokaryote genomes. Nucleic Acids Res 2004; 32:W318-20. [PMID: 15215402 PMCID: PMC441502 DOI: 10.1093/nar/gkh364] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
An interactive web server is developed for predicting the potential binding sites and its target operons for a given regulatory protein in prokaryotic genomes. The program allows users to submit known or experimentally determined binding sites of a regulatory protein as ungapped multiple sequence alignments. It analyses the upstream regions of all genes in a user-selected prokaryote genome and returns the potential binding sites along with the downstream co-regulated genes (operons). The known binding sites of a regulatory protein can also be used to identify its orthologue binding sites in phylogeneticaly related genomes where the trans-acting regulator protein and cognate cis-acting DNA sequences could be conserved. PredictRegulon can be freely accessed from a link on our world wide web server: http://www.cdfd.org.in/predictregulon/.
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Senthil Kumar M, Kim T, Lee S, Song S, Yang J, Nahm K, Suh EK. Influence of electric field type on the assembly of single walled carbon nanotubes. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2003.11.032] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Lakshmanan E, Kannan R, Senthil Kumar M. Major ion chemistry and identification of hydrogeochemical processes of ground water in a part of Kancheepuram district, Tamil Nadu, India. ACTA ACUST UNITED AC 2003. [DOI: 10.1306/eg100403011] [Citation(s) in RCA: 201] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Viswanathan P, Venkaiah B, Kumar MS, Rasheedi S, Vrati S, Bashyam MD, Hasnain SE. The homologous region sequence (hr1) of Autographa californica multinucleocapsid polyhedrosis virus can enhance transcription from non-baculoviral promoters in mammalian cells. J Biol Chem 2003; 278:52564-71. [PMID: 14570875 DOI: 10.1074/jbc.m309351200] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The Autographa californica multinucleocapsid polyhedrosis virus homologous region sequence hr1 enhances transcription from the viral polyhedrin promoter in Spodoptera frugiperda insect cells and independently functions as an origin of replication (ori) sequence. The binding of the host nuclear protein, hr1-binding protein (hr1-BP), is crucial for the enhancer activity (Habib, S., Pandey, S., Chatterji, U., Burma, S., Ahmad, R., Jain, A., and Hasnain, S. E. (1996) DNA Cell Biol. 15, 737-747 and Habib, S., and Hasnain, S. E. (1996) J. Biol. Chem. 271, 28250-28258). We demonstrate that hr1 can also enhance transcription from non-baculoviral promoters like cytomegalovirus and hsp70 in mammalian cells but does not support ori activity in these cells. Unlike insect cells, hr1 can also function in mammalian cells as an enhancer when present in trans. hr1 DNA sequence binds with high affinity and specificity to nuclear factors in the mammalian cells. The insect hr1-BP- and the hr1-BP-like proteins from mammalian cells (mhr1-BP) have different properties with respect to ion requirements, DNA groove binding, and molecular size. When mammalian cells are infected with a recombinant baculovirus containing two promoters, the baculovirus polyhedrin and Drosophila hsp70 gene promoter, the hsp70 gene promoter alone is active in these cells, and this activity is further enhanced by the presence of an additional hr1 in the recombinant virus. hr1 may thus also have a role in baculovirus-mediated gene delivery in mammalian cells.
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Kumar MS, Kode RK, Pankewycz OG, Laftavi MR, Kumar AM, Damask AM, Vora M, Tomeny MB, Ferry E, Samartino BC, Sierka D, Lingaraju RM, Fyfe B. Simulect, Neoral, Cellcept, and prednisone in kidney recipients with delayed graft function: a prospective controlled study. Transplant Proc 2001; 33:3762-3. [PMID: 11750602 DOI: 10.1016/s0041-1345(01)02592-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kumar AM, Fa K, Vankawala R, Vora M, Kode RK, Pankewycz OG, Lattavi MR, Fyfe B, Damask AM, Ferry E, Stabler S, Tomeny MB, Phillips K, Lingaraju R, Kumar MS. Simulect, calcineurin inhibitor, mycophenolate mofetil, and prednisone is more effective than OKT3, calcineurin inhibitor, hycophendate mofetil, and prednisone in African American kidney recipients in reducing acute rejections and prolonging graft survival. Transplant Proc 2001; 33:3195-6. [PMID: 11750370 DOI: 10.1016/s0041-1345(01)02359-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rao KN, Gopinath R, Kumar MS, Suryanarayana I, Prasad PS. Interaction-induced enhancement in the activity and selectivity of a titania-supported ammonium salt of a 12-molybdophosphoric acid catalyst during ammoxidation of 2-methylpyrazine. Chem Commun (Camb) 2001:2088-9. [PMID: 12240176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
A titania-supported ammonium salt of 12-molybdophosphoric acid has been synthesized, and the salt-support interaction, which enhanced the reaction rate, has been correlated with the activity of the catalyst in the ammoxidation of 2-methylpyrazine.
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Kannan R, Ramprakash B, Kumar MS, Balachander J, Sethuraman KR. Angioplasty of membranous obstruction of inferior vena cava. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 2001; 49:921-2. [PMID: 11837765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Membranous obstruction of vena cava (MOVC) is a common cause of hepatic venous outflow obstruction. Surgical procedures utilized to relieve symptoms carry a high morbidity and mortality. A patient who presented with gradual onset ascites and dilated, tortuous veins over the anterior abdominal wall and the back was found to have MOVC by inferior vena cavogram. Balloon dilatation of the obstruction was done successfully through a transvenous approach. Following this, the patient improved remarkably. The procedure is safe, effective and easy to perform. This balloon angioplasty provides alternative method for treatment of membranous obstruction of vena cava.
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Nagaraja P, Kumar MS, Rangappa KS. Dapsone and iminodibenzyl as novel reagents for the spectrophotometric determination of trace amounts of nitrite in water samples. ANAL SCI 2001; 17:439-42. [PMID: 11990624 DOI: 10.2116/analsci.17.439] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A rapid, simple, sensitive and selective spectrophotometric determination of nitrite using new diazotizing and coupling reagents is described. The method is based on a diazotization-coupling reaction between dapsone and iminodibenzyl in a hydrochloric acid medium. The molar absorptivity and Sandell's sensitivity were found to be 7.5 x 10(4) l mol(-1) cm(-1) and 0.000613 microg ml(-1), respectively. The interference effects of various cations and anions were also studied and reported. This method has been found to be applicable for the determination of nitrite in various water samples.
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Kode RK, Foster CE, Kumar AM, Vankawala R, Damask AM, Fyfe BS, Seirka D, Laftavi MR, Brezin J, Pankewycz O, Chvala R, Kumar MS. Nine year experience with kidney transplantation in patients with positive hepatitis C virus antibody. Transplant Proc 2001; 33:1186-7. [PMID: 11267250 DOI: 10.1016/s0041-1345(00)02378-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kode RK, Kumar AM, Pankewycz O, Damask AM, Seirka D, Lam A, Phillips K, Ardron M, Brezin J, Chvala R, Kumar MS. Simulect induction significantly decreases CMV infection in kidney recipients compared to OKT3. Transplant Proc 2001; 33:1268-9. [PMID: 11267286 DOI: 10.1016/s0041-1345(00)02472-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chowdhury S, Kode RK, Ranganna K, Damask AM, Lam A, Fyfe B, Stabler S, Kumar AM, Tomeny MB, Kumar MS, Pankewycz O. Induction strategy using basiliximab combined with mycophenolate MMF and immediate low-dose cyclosporin is steroid sparing and more effective than OKT3. Transplant Proc 2001; 33:1057-8. [PMID: 11267189 DOI: 10.1016/s0041-1345(00)02414-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abouljoud M, Kumar MS, Brayman K, Emre S, Bynon SJ. Conversion to neoral provides effective rescue therapy for liver and kidney transplant patients intolerant of Prograf. Transplant Proc 2001; 33:1027-8. [PMID: 11267175 DOI: 10.1016/s0041-1345(00)02315-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Abstract
Epiphyseal fractures of the distal radius are common in children but those involving the distal ulna are rare. Distal ulna epiphyseal injuries are usually Salter-Harris type II and are usually reduced closed and held in plaster to produce good results. In this paper we describe a Salter-Harris type IV injury of the distal ulna epiphysis which required open reduction and internal fixation due to soft tissue interposition.
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Al-Abdullah IH, Ayala T, Panigrahi D, Kumar AM, Kumar MS. Neogenesis of pancreatic endocrine cells in copper-deprived rat models. Pancreas 2000; 21:63-8. [PMID: 10881934 DOI: 10.1097/00006676-200007000-00053] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Transplantation of progenitor cells for regeneration of islet cells could prove invaluable in the treatment of diabetes mellitus. This study provides evidence that in rats maintained on a copper-deficient diet containing the copper-chelating agent tetraethylenepentamine pentahydrochloride, regeneration of single alpha and beta endocrine cells in the ductules and acinar tissue of the adult rat pancreata occurred. These regenerated cells both in the ductules and acinar tissue stained positive for glucagon and insulin similar to cells within the islets and in addition to being reactive to proliferative cellular nuclear antigen, an intracellular marker of active proliferation. In contrast, the control group pancreata did not show any evidence of islet regeneration, proliferation, or proliferative cellular nuclear antigen reactivity pre- or posttransplantation. Transplantation of digested pancreatic tissues from the copper-deficient group into the spleen of syngeneic diabetic rats reversed diabetes, and this was confirmed histologically by demonstrating cells within ductules that stained positively for insulin. This study concludes that copper deprivation contributes to the neogenesis of pancreatic alpha and beta cells in the ductules and acinar tissue of adult pancreas in rat model and that transplanted stem cells maintain their functional capacity in the recipient after transplantation.
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Kirker-Head CA, Chandna VK, Agarwal RK, Morris EA, Tidwell A, O'Callaghan MW, Rand W, Kumar MS. Concentrations of substance P and prostaglandin E2 in synovial fluid of normal and abnormal joints of horses. Am J Vet Res 2000; 61:714-8. [PMID: 10850851 DOI: 10.2460/ajvr.2000.61.714] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To correlate substance P content of synovial fluid with prostaglandin E2 content, radiographic evidence of joint abnormality, and anatomic location of the joint for normal and osteoarthritic joints of horses. SAMPLE POPULATION Synovial fluid from 46 normal joints in 21 horses and 16 osteoarthritic joints in 10 horses. PROCEDURE Normal and osteoarthritic joints were identified by clinical and radiographic examination, by response to nerve blocks, during scintigraphy or surgery, or by clinicopathologic evaluation. Substance P and prostaglandin E2 contents of synovial fluid were determined by radioimmunoassay. Radio-graphs of joints were assigned a numeric score reflecting severity of lesions. Joints were assigned a numeric score reflecting anatomic location. RESULTS Median concentrations of substance P and prostaglandin E2 were significantly increased in osteoarthritic joints, compared with normal joints. A significant correlation was found between concentrations of substance P and prostaglandin E2 in synovial fluid, but a correlation was not detected between substance P concentration in synovial fluid and anatomic location of the joint or between radiographic scores of osteoarthritic joints and concentrations of substance P or prostaglandin E2. CONCLUSIONS AND CLINICAL RELEVANCE A correlation existed between concentrations of substance P and prostaglandin E2 in synovial fluid obtained from normal and osteoarthritic joints. However, content of substance P in synovial fluid cannot be predicted by the radiographic appearance of the joint or its anatomic location. Substance P and prostaglandin E2 may share an important and related role in the etiopathogenesis of osteoarthritis, lending credence to the importance of neurogenic inflammation in horses.
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Kumar MS, Kumar PM, Sarnaik HM, Sadhukhan AK. A rapid technique for screening of lovastatin-producing strains of Aspergillus terreus by agar plug and Neurospora crassa bioassay. J Microbiol Methods 2000; 40:99-104. [PMID: 10739348 DOI: 10.1016/s0167-7012(99)00135-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The success of strain improvement programme depends on the number of isolates that can be screened after mutagenic treatment. A technique to rapidly screen large number of high-yielding isolates was developed. The 'agar plug' method that utilizes the anti-fungal property of lovastatin to produce a zone of inhibition against Neurospora crassa was not only economical but also less labour-intensive. We were able to isolate a high-yielding strain, the productivity of which increased by 138% as compared to the parent strain in the submerged fermentation process.
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