76
|
Mishra SK, Khan AA, Narayan R, Singh SP, Pratap SO, Saxena D, Chaudhuri D. Inheritance of plumage colour variations in a large flock of Japanese quail. Br Poult Sci 2012; 52:686-93. [PMID: 22221234 DOI: 10.1080/00071668.2011.640306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
1. The inheritance of various plumage colour variants and their underlying interactions were investigated in a large flock of Japanese quail maintained at CARI (India) by conducting reciprocal crosses between four breeding stocks inheriting Pharaoh, White Breasted, White and Brown plumages, followed by test crosses. 2. Based on the proportion of plumage-colour types in the progeny, putative genotypes were determined for parents and offspring for each of the crosses. 3. The White and Brown phenotypes were attributed to the Panda (S) and Roux (Br) loci respectively in agreement with contemporary quail stocks. 4. The White Breasted plumage type present in our stock was caused by a novel mutation with dominant gene action at an autosomal locus that was not allelic to either Panda or the White feather locus. 5. A recessive epistatic action of the Panda locus (S) on White Breasted (Wb) resulted in a White colour phenotype. 6. A novel phenotype, White Breasted-Brown was co-expressed with the Br and Wb loci. 7. It was concluded that breeding for customized feather colour phenotypes in Japanese quail using colour mutations was feasible and would be advantageous in order to overcome the limitations of legislation to protect wildlife in India.
Collapse
|
77
|
Arora G, Mishra SK, Nautiyal B, Pratap SO, Gupta A, Beura CK, Singh DP. Genetics of hyperpigmentation associated with the Fibromelanosis gene (Fm) and analysis of growth and meat quality traits in crosses of native Indian Kadaknath chickens and non-indigenous breeds. Br Poult Sci 2012; 52:675-85. [PMID: 22221233 DOI: 10.1080/00071668.2011.635637] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
1. The study investigated the extent of hyperpigmentation (a trait fixed in native Indian Kadaknath chickens), bodyweight, carcase quality and leanness at 12 weeks of age in F(1) and back-crosses of Kadaknath with White Leghorn, White Plymouth Rock and Aseel Peela chickens. 2. The objective of the study was to determine if hyperpigmentation was affected by the major gene Fibromelanosis (Fm) and to evaluate the effects of different proportions of Kadaknath genes on growth and carcase quality. 3. The pigmentation pattern of skin indicated that Fm behaved as the primary locus affecting dermal-hyperpigmentation and that the sex-linked Id locus produced an epistatic effect. 4. The results suggested that variable allelic forms of Id were acting in different crosses, which resulted in variation in melanosis of the host. However, no conclusive pattern for shank pigmentation could be explained through genotyping of the Id and Fm loci. 5. Analysis of quantitative traits indicated the positive impact of a Kadaknath genomic proportion of 50% or more on meat texture and carcase leanness. Improvement in leanness occurred in White Rock crosses but not in White Leghorn and Aseel Peela crosses. 6. Thigh-meat texture was influenced more by enhanced Kadaknath genomic proportions than the breast-meat. It was concluded that introgression of Kadaknath genomic proportion beyond 50% in a cross with meat-type chickens, irrespective of the impact Fm, brought improvement in meat quality whereas no such advantage was obtained for growth traits. 7. The beneficial impact of the Kadaknath genome on meat quality calls for further studies to identify causative genes for their selective use to improve meat quality in Kadaknath crossbred chickens.
Collapse
|
78
|
Mishra SK, Tiwari BR, Yadav BK. Status of pathology professionals. JOURNAL OF NEPAL HEALTH RESEARCH COUNCIL 2012; 10:37-40. [PMID: 22929635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND The status of basic, general and specialist workforces in pathology services in Nepal needs to be defined and explored for better pathology services. The objective of the study was to find out the status of laboratory medicine professionals (pathology workforces) and the regulation of ethics and limitations of the different level of workforces. METHODS A cross-sectional descriptive study was conducted by observing and taking interview with the head of the clinical private institutions from August 2008 to January 2009. A total of 373 private pathology laboratories and the workforces working over there were included in the study. RESULTS The workforces heading private pathology services showed that 153 (41%) of laboratories were headed by laboratory assistant, 79 (21%) by laboratory technician, 90 (24%) by (medical technologist) pathology officer, 30 (8%) by histocytopathologist and 21 (6%) by non pathology professionals. Officer level Pathology workforce (eligible to work independently) was 113 (30%) whereas 260 (70%) of laboratories had no such workforces. Intermediate level Pathology workforce (eligible to work dependently and for some investigation independently) was 34% (127/373) where as 66% (246/373) of laboratories were lacking such workforces. Specialist level (MD/M. Sc) workforces in histocytopathology, clinical microbiology and cytopatholgy & hematology were 43 (11%), 10 (3%) and 3 (1%) respectively. CONCLUSIONS The workforces heading the private laboratories were not according to the norms of good laboratory practices. The workforces had crossed their limitations and ethical barrier in performing pathological investigations which did not abide by the rules and regulations made by respective councils of Nepal by pathology workforces. There was intervention of non medical/clinical workforce in laboratory services especially in microbiology and biochemistry.
Collapse
|
79
|
Tewari RK, Mishra SK, Kumar A, Garg AK, Jindal MK, Juneja H. Single Step Endodontic Management of Immature Apices using MTA. Int J Clin Pediatr Dent 2011; 4:260-3. [PMID: 27678239 PMCID: PMC5034091 DOI: 10.5005/jp-journals-10005-1122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2011] [Accepted: 07/24/2011] [Indexed: 11/23/2022] Open
Abstract
AIM To examine the clinical and radiographic appearance of teeth with immature apices that were treated by single step procedure using mineral trioxide aggregate (MTA). SUMMARY Creation of a physiological hard tissue barrier with calcium hydroxide in a nonvital tooth although quite predictable has certain limitations, such as the very long duration of the treatment spread over multiple visits and increased risk of root fracture. Plugging the root canal end with MTA has been advocated as an alternative treatment modality for open apices. The technique has been proven to be successful in many recently reported cases. The cases reported here present the successful treatment of two traumatized maxillary central incisors with open apices and periapical lesions using MTA. In this case report, MTA has been used to create a hard tissue barrier after disinfection of the root canal.
Collapse
|
80
|
Singh TU, Garg SK, Mishra SK. Evaluation of effects of eicosapentaenoic acid on Na⁺-K⁺-ATPase in sheep pulmonary artery. Hum Exp Toxicol 2011; 31:579-87. [PMID: 21844071 DOI: 10.1177/0960327111417909] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In the present study, we have evaluated the effects of eicosapentaenoic acid (EPA) on Na(+)-K(+)-ATPase in sheep pulmonary artery. Acute (30 min) and prolonged (24 h) exposure of arterial rings to EPA (30 μM) significantly decreased potassium chloride (KCl)-induced relaxation, an index of functional Na(+)-K(+)-ATPase activity. In acute exposure, the pD(2) and E (max) (the maximal response) values for KCl-induced relaxation were 3.21 ± 0.33 and 61.58 ± 11.30% (n = 5) versus control 3.58 ± 0.07 and 82.44 ± 2.36% (n = 24), respectively. The pD(2) and E (max) values for KCl-induced relaxation in arterial rings exposed to EPA for 24 h in organ culture were 2.52 ± 0.11 and 55.00 ± 5.72% versus control 3.04 ± 0.19 and 80.74 ± 11.96%, respectively; n = 4. Exposure of the arterial rings to EPA (30 μM) for 24 h in organ culture, significantly decreased (17.58 ± 2.15%) the protein expression of α(1) isoform of Na(+)-K(+)-ATPase. Acute exposure to EPA for 30 min significantly decreased (21.06 ± 5.89%) the Na(+)-K(+)-ATPase activity as measured by inorganic phosphate (Pi) release. EPA, up to 100 μM concentration, marginally (<10% of 80 mM KCl contraction) increased the basal tone of the pulmonary artery. Additionally, EPA (10-30 μM) had no effect on Mg(2+)-ATPase activity as well as on cyclic guanosine monophosphate (cGMP) production. All these results show that EPA has inhibitory effect on Na(+)-K(+)-ATPase in sheep pulmonary artery but prolonged exposure had no additional effect on sodium pump, and EPA-induced inhibition of Na(+)-K(+)-ATPase may be due to attenuation in protein expression of α(1) isoform of Na(+)-K(+)-ATPase independent of cGMP production.
Collapse
|
81
|
Ahuja T, Tanwar VK, Mishra SK, Kumar D, Biradar AM. Immobilization of uricase enzyme on self-assembled gold nanoparticles for application in uric acid biosensor. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2011; 11:4692-4701. [PMID: 21770094 DOI: 10.1166/jnn.2011.4158] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An enzyme immobilization matrix is described by preparing a self-assembly of gold nanoparticles (GNPs) over a self-assembled monolayer (SAM) of 3-aminopropyltriethoxysilane (APTES) on an indium-tin-oxide (ITO) coated glass plate. The surface of the GNPs was modified with a mixed (1:9) SAM of 11-mercaptoundecanoic acid (MUA) and 3-mercapto-propionic acid (MPA). The enzyme, uricase was covalently immobilized to the carboxyl groups of the mixed SAM of MUA/MPA through carbodiimide coupling reaction. The whole assembly was constructed on 1 cm2 area of ITO-glass plate and was tested as an amperometric biosensor for the detection of uric acid in aqueous solution. The biosensor assembly was characterized by atomic force microscopy (AFM) and electrochemical techniques. The AFM of the enzyme biosensor assembly reveals an asymmetrical sharp regular island-like structure with an average roughness parameter value of 2.81 nm. Chronoamperometric response was measured as a function of uric acid concentration in aqueous solution (pH 7.4), which exhibits a linear response over a concentration range of 0.07 to 0.63 mM with a sensitivity of 19.27 microAmM(-1) and a response of 25 s with excellent reproducibility. These results are not influenced by the presence of interfering reagents such as ascorbic acid, urea and glucose. GNPs-biomolecule assemblies constructed using this method may facilitate development of new hybrid biosensing materials.
Collapse
|
82
|
Priyambada L, Bhatia V, Krishnani N, Agarwal V, Bhattacharyya A, Jain S, Mishra SK, Marwaha RK. Primary hypothyroidism, precocious puberty and hypothalamic obesity in Langerhans cell histiocytosis. Indian J Pediatr 2011; 78:351-3. [PMID: 21038089 DOI: 10.1007/s12098-010-0271-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Accepted: 10/06/2010] [Indexed: 12/01/2022]
Abstract
A 5 year old girl presented with central diabetes insipidus and primary hypothyroidism. No clinical or radiological evidence of Langerhans cell histiocytosis (LCH) was present. Absent posterior pituitary bright spot was seen in magnetic resonance imaging of the brain. She subsequently developed severe headache, massive obesity, accelerated growth and thelarche. A repeat MRI of the brain revealed hypothalamic tumor. Hormonal investigations revealed, paradoxically, undetectable growth hormone on a clonidine stimulation test. Langerhans cell histiocytosis was proved on electron microscopy of the thyroid tissue. There needs to be a high degree of suspicion for LCH as an etiology of primary hypothyroidism, especially in the presence of diabetes insipidus. Precocious puberty, accelerated growth despite growth hormone deficiency, hypothalamic obesity may occur in pediatric LCH. CNS lesions may have an evolving course, thus repeat neuroimaging is important.
Collapse
|
83
|
Sharma DR, Pradhan B, Mishra SK. Multiple drug resistance in bacterial isolates from liquid wastes generated in central hospitals of Nepal. Kathmandu Univ Med J (KUMJ) 2011; 8:40-4. [PMID: 21209506 DOI: 10.3126/kumj.v8i1.3220] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND Healthcare liquid wastes are the reservoirs of harmful infectious agents such as the pathogens and multiple drug resistant microorganisms. Potential infectious risks include the spread of infectious diseases and microbial resistance from health-care establishments into the environment and thereby posing risks of getting infections and antibiotic resistance in the communities. OBJECTIVES The objectives of this study were to assess the bacterial load of healthcare liquid waste generated in central hospitals and to explore the antimicrobial resistance pattern of these bacterial isolates. MATERIALS AND METHODS A descriptive study was carried out in 10 conveniently selected central hospitals of Nepal during the period of May to December 2008. Effluent specimens from each hospital were subjected to total viable count studies by spread plate method in nutrient agar plate and incubated for 24 hours at 37 °C using standard laboratory protocol. Similarly, all the specimens were cultured in Mac Conkey Agar media supplemented with 30 μg/ml of Chloramphenicol and 20 μg/ml of Gentamycin for the enumeration of multiple drug resistant (MDR) bacteria, which were further subjected to in-vitro antibiotic susceptibility test by modified Kirby Bauer disc diffusion technique for resistance patterns. RESULTS Total viable counts of hospital effluents significantly exceeded the standard heterotrophic plate count (p=0.000). Similarly, the numbers of multiple drug resistant bacteria were alarmingly high in three (more than 30% in 2 and 50% in 1) hospitals of this study. Drug resistant hospital effluent isolates showed simultaneous resistance for most of the antibiotics including Penicillin, Cephalosporin, Cotrimoxazole, Gentamycin and Quinolones. CONCLUSION Healthcare liquid wastes were laden with MDR bacteria and seemed to pose a huge public health threat in the transfer of such resistance to the bacterial pathogens causing community acquired infections, thereby limiting our antibiotic pool.
Collapse
|
84
|
Verma AK, Chand G, Mishra A, Agarwal G, Agarwal A, Mishra SK, Ramakant P. Salutary effect of parathyroidectomy on neuropsychiatric symptoms in patients with primary hyperparathyroidism: Evaluation using PAS and SF-36v2 scoring systems. J Postgrad Med 2011; 57:96-101. [DOI: 10.4103/0022-3859.81859] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
85
|
Chowdhary R, Chowdhary N, Mishra SK. Re-osseointegration of loosened implant in a splinted fixed prosthesis. Niger J Clin Pract 2011; 14:102-5. [DOI: 10.4103/1119-3077.79259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
86
|
Ramakant P, Verma AK, Misra R, Prasad KN, Chand G, Mishra A, Agarwal G, Agarwal A, Mishra SK. Changing microbiological profile of pathogenic bacteria in diabetic foot infections: time for a rethink on which empirical therapy to choose? Diabetologia 2011; 54:58-64. [PMID: 20835702 DOI: 10.1007/s00125-010-1893-7] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Accepted: 07/26/2010] [Indexed: 12/15/2022]
Abstract
AIMS/HYPOTHESIS We studied the bacterial aetiology and antibiotic sensitivity pattern of diabetic foot ulcers in India. METHODS Records of 447 hospitalised patients between 1991 and 2008 were retrospectively analysed between two time periods (before and after 1999) to compare bacterial aetiology and antimicrobial sensitivity patterns. The first three consecutive cultures from the same wound during treatment were evaluated. RESULTS Of 1,632 cultures, 66% were polymicrobial, 23% monomicrobial and 11% sterile. In the monomicrobial group, 14% (n = 228) of cultures were Gram-negative, whereas 9% (n = 147) were Gram-positive. The most common pathogens in the first culture were Pseudomonas aeruginosa (20.1%), Staphylococcus aureus (17.2%) and Escherichia coli (16.3%). Results for the third cultures showed persistence of P. aeruginosa (15.3%) and E. coli (14.2%). Gram-negative isolates dominated over Gram-positive ones (25.3% vs 15.1%, p < 0.05). Antibiotic sensitivity patterns before and after 1999 were: piperacillin-tazobactam 74% vs 66% (p < 0.005), imipenem 77% vs 85% (NS), cefoperazone-sulbactam 47% vs 44% (p < 0.005), amikacin 62% vs 78% (NS), ceftriaxone 41% vs 36% (p < 0.005), amoxicillin-clavulanate 51% vs 43% (p < 0.05) and clindamycin 43% vs 36% (p < 0.005), respectively. CONCLUSIONS/INTERPRETATION Unlike in the West, in India Gram-negative bacteria were found to have always been dominant in the wounds of patients with diabetic foot infections. Infection with polymicrobial multidrug-resistant Gram-negative bacilli is common. The policy of empirical antimicrobial therapy at tertiary care needs to be changed.
Collapse
|
87
|
Mishra SK, Jindal MK, Singh RP, Stark TR, Hashmi GS. Submerged and Impacted Primary Molars. Int J Clin Pediatr Dent 2010; 3:211-3. [PMID: 27616846 PMCID: PMC4993830 DOI: 10.5005/jp-journals-10005-1080i] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Accepted: 06/17/2010] [Indexed: 11/23/2022] Open
Abstract
Submerged tooth is the one that is depressed below the occlusal plane. Dental ankylosis is thought to be a major cause of submergence. Submerged deciduous teeth have the potential to cause malocclusion not only by prevention of their exfoliation and subsequent replacement by permanent teeth but also by causing tilting of proximal teeth and extrusion of opposing tooth. The purpose of this report is to present three different cases of submerged deciduous teeth and their clinical effects.
Collapse
|
88
|
Lakshmi V, Singh N, Shrivastva S, Mishra SK, Dharmani P, Mishra V, Palit G. Gedunin and photogedunin of Xylocarpus granatum show significant anti-secretory effects and protect the gastric mucosa of peptic ulcer in rats. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2010; 17:569-574. [PMID: 19962286 DOI: 10.1016/j.phymed.2009.10.016] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Revised: 09/18/2009] [Accepted: 10/12/2009] [Indexed: 05/28/2023]
Abstract
In the present study, the gastroprotective mechanism of Xylocarpus granatum fruit and its active constituents gedunin and photogedunin was investigated. Chloroform fraction (Fr-CHCl(3)) of X. granatum fruit was evaluated against cold restraint (CRU), aspirin (AS), alcohol (AL) and pyloric ligation (PL) induced gastric ulcer models in rats and histamine (HA) induced duodenal ulcer model in guinea pigs. Potential anti-ulcer activity of Fr-CHCl(3) was observed against CRU (58.28%), AS (67.81%), AL (84.38%), PL (65.66%) and HA (61.93%) induced ulcer models. The standard drug omeprazole (10mg/kg, p.o.) showed 68.25% protection against CRU, 57.08% against AS and 69.42% against PL model and 70.79% against HA induced duodenal ulcer. Sucralfate, another standard drug (500 mg/kg, p.o.) showed 62.72% protection in AL induced ulcer model. Fr-CHCl(3) significantly reduced free acidity (51.42%), total acidity (30.76%) and upregulated mucin secretion by 58.37% respectively. Phytochemical investigations of Fr-CHCl(3) yielded gedunin (36%), photogedunin (2%). Further, Fr-CHCl(3) and its compounds gedunin and photogedunin significantly inhibited H(+) K(+)-ATPase activity in vitro with IC(50) of 89.37, 56.86 and 66.54 microg/ml respectively as compared to the IC(50) value of omeprazole (30.24 microg/ml) confirming their anti-secretory activity. Conclusively, Fr-CHCl(3) of Xylocarpus granatum was found to possess anti-ulcerogenic activity which might be due to its anti-secretory activity and subsequent strengthening of the defensive mechanism. This study is the first of its kind to show significant anti-secretory effect of gedunin and photogedunin. Therefore it could act as a potent therapeutic agent against peptic ulcer disease.
Collapse
|
89
|
Shivam K, Mishra SK. Response surface optimization of the critical medium components for the production of alpha-galactosidase from Aspergillus parasiticus MTCC-2796. Folia Biol (Praha) 2010; 56:78-82. [PMID: 20492760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Response surface methodology was used to evaluate the effect of main variables such as concentration of galactose, yeast extract and wheat bran on alpha-galactosidase production from Aspergillus parasiticus MTCC-2796 under submerged fermentation conditions. A full factorial Central Composite Design was applied to study these main factors that affected alpha-galactosidase production. The experimental results showed that the optimum concentration of galactose, yeast extract and wheat bran were 1.5 %, 0.06 % and 1.5 %, respectively. This method was efficient as only 20 experiments were necessary to asses these conditions, and model adequacy was very satisfactory as the coefficient of determination was 0.9921.
Collapse
|
90
|
Mathur V, Parihar JKS, Maggon R, Mishra SK. Role of Transpupillary Thermotherapy in Central Serous Chorio-Retinopathy. Med J Armed Forces India 2009; 65:323-7. [PMID: 27408285 PMCID: PMC4921371 DOI: 10.1016/s0377-1237(09)80092-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Accepted: 06/11/2009] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND To assess the efficacy of transpupillary thermo therapy (TTT) in cases of chronic central serous chorio- retinopathy (CSCR). METHODS A prospective evaluation was carried out on 25 cases of chronic CSCR who were subjected to TTT. Resolution of CSCR and improvement in visual acuity was noted after six weeks of therapy. RESULT Out of 25 patients, 13 (52%) had complete success (resolution of CSCR and improvement in visual acuity > 2 lines on Snellen's chart), 10 (42%) had qualified success (resolution of CSCR but no improvement in visual acuity) and two (8%) had failure to therapy (no resolution of CSCR or improvement in visual acuity). CONCLUSION TTT maybe a good modality in aiding resolution of subretinal fluid in cases of chronic CSCR. However, improvement in visual function is dependent upon integrity of photo receptor layer of retina which is not influenced by this modality. A controlled study could be undertaken to compare outcome of TTT with conservative management in cases of early CSCR such that deleterious effects of chronic CSCR on the retinal photoreceptor layer are avoided.
Collapse
|
91
|
Chaube SK, Tripathi A, Khatun S, Mishra SK, Prasad PV, Shrivastav TG. Extracellular calcium protects against verapamil-induced metaphase-II arrest and initiation of apoptosis in aged rat eggs. Cell Biol Int 2009; 33:337-43. [PMID: 19385030 DOI: 10.1016/j.cellbi.2009.01.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Non-specific L-type calcium channel blockers, such as verapamil (> or =50 microM), induce metaphase-II (M-II) arrest and apoptosis in aged rat eggs cultured in Ca(2+)-deficient medium. However, the effects of extracellular Ca(2+) on verapamil-induced M-II arrest and apoptosis have not yet been reported. We have demonstrated that postovulatory aging induced exit from M-II arrest by extruding a second polar body, a morphological sign of spontaneous egg activation (SEA). Verapamil inhibited SEA and induced egg apoptosis in a dose-dependent manner in Ca(2+)-deficient medium. The initiation of apoptotic features was observed at 50 microM of verapamil. Extracellular Ca(2+) (1.80 mM) reduced intracellular H2O2 level, bax protein expression, caspase-3 activity, DNA fragmentation and protected against 50 microM, but not higher concentrations of > or =100 microM in verapamil-induced egg apoptosis. These results suggest that extracellular Ca(2+) ions have a role during SEA and protect against verapamil induced apoptosis in aged rat eggs.
Collapse
|
92
|
Pradeep PV, Tiwari P, Mishra A, Agarwal G, Agarwal A, Verma AK, Mishra SK. Pulmonary function profile in patients with benign goiters without symptoms of respiratory compromise and the early effect of thyroidectomy. J Postgrad Med 2009; 54:98-101. [PMID: 18480524 DOI: 10.4103/0022-3859.40774] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND A large number of patients in our country develop goiters which seem to be apparently asymptomatic. Conventional radiography does not address the abnormal air flow dynamics. Flow volume loop studies have shown characteristic dampening of both inspiratory and expiratory curves. Pulmonary function tests (PFT) can provide a simple noninvasive method of assessing airway compromise. AIM To address the effect of longstanding asymptomatic, benign goiter by performing PFT on the preoperative airway dynamics and the early postoperative changes at six weeks. SETTING AND DESIGN Tertiary care center, Prospective study. MATERIALS AND METHODS Sixty-four patients with benign goiters were included after they satisfied the necessary exclusion and inclusion criteria. Pulmonary function tests were performed in the pre and postoperative period. STATISTICAL ANALYSIS USED SPSS ver. 10 software, Pearson's Bivariate correlation and students T test. RESULTS The preoperative PFT showed significant reduction in the Vital capacity (VC), Forced Vital Capacity (FVC), Forced expiratory volume in one second (FEV1), mid expiratory flow (MEF 25) and MEF 50 in the females and VC, FVC and FEV1 in males. Postoperatively significant improvement was observed in the tidal volume (VT) and FEV1 in the females and airway resistance in males. CONCLUSIONS Pulmonary function tests can demonstrate the unmanifested abnormal airflow dynamics in benign asymptomatic goiters, which would have otherwise taken years to manifest. This abnormality improved after thyroidectomy, especially the forced expiratory maneuvers. The duration and weight of the goiter correlated well with reduction in FEV1 and its subsequent improvement after surgery in females.
Collapse
|
93
|
Mishra SK, Radu F, Dürr HA, Eberhardt W. Training-induced positive exchange bias in NiFe/IrMn bilayers. PHYSICAL REVIEW LETTERS 2009; 102:177208. [PMID: 19518827 DOI: 10.1103/physrevlett.102.177208] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2008] [Indexed: 05/27/2023]
Abstract
Positive exchange bias has been observed in the Ni81Fe19/Ir20Mn80 bilayer system via soft-x-ray resonant magnetic scattering. After field cooling of the system through the blocking temperature of the antiferromagnet, an initial conventional negative exchange bias is removed after training, i.e., successive magnetization reversals, resulting in a positive exchange bias for a temperature range down to 30 K below the blocking temperature (450 K). This new manifestation of magnetic training is discussed in terms of metastable magnetic disorder at the magnetically frustrated interface during magnetization reversal.
Collapse
|
94
|
Mishra A, Agrawal V, Krishnani N, Mishra SK. Prevalence of RET/PTC expression in papillary thyroid carcinoma and its correlation with prognostic factors in a north Indian population. J Postgrad Med 2009; 55:171-5. [DOI: 10.4103/0022-3859.57390] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
95
|
Sundaraiya S, Pradhan PK, Gupta A, Jain M, Mishra SK, Das BK. Coexistence of carcinoma breast and Paget's disease of bone. J Cancer Res Ther 2008; 4:48-9. [PMID: 18417905 DOI: 10.4103/0973-1482.39608] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
We report a case of a patient with carcinoma breast who was incidentally diagnosed to be also suffering from Paget's disease of bone on a routine radionuclide bone scan. CT-guided biopsy and histopathology later confirmed the diagnosis.
Collapse
|
96
|
Goswami R, Mishra SK, Kochupillai N. Prevalence & potential significance of vitamin D deficiency in Asian Indians. Indian J Med Res 2008; 127:229-238. [PMID: 18497436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
Studies from our center and other parts of India have drawn attention towards wide prevalence of vitamin D deficiency (VDD) in our country. VDD has been reported in all age groups including toddlers, school children, pregnant women and their neonates and adult males and females residing in rural and urban India. We reviewed implications of VDD in our population based on the preliminary data available from Indian studies on skeletal health. Besides, a brief review is made on the importance of VDD in various other disorders prevalent in equivalent proportions among Indians such as type 2 diabetes mellitus (DM), cardiovascular diseases (CVD), immune competence including relation to tuberculosis, malignancy and osteoarthritis. Data from the West have also associated VDD with increased prevalence of type 2DM, CVD, autoimmune disorders, tuberculosis, prostate, breast and colon malignancy and osteoarthritis. Such association has not been studied to date in our country. Overall results of various studies conducted to date in urban and rural Indians indicate that widely prevalent VDD is functionally relevant to skeletal health including osteomalacia and rickets. However, there is a need to explore its association with osteoporosis related fractures and various other non skeletal disorders linked with VDD.
Collapse
|
97
|
Singh N, Agarwal A, Chand G, Agarwal G, Verma AK, Mishra SK. Minithyroidectomy: a preliminary report from a specialised thyroid unit. JOURNAL OF THE INDIAN MEDICAL ASSOCIATION 2008; 106:107-108. [PMID: 18705254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In the past few years, minimally invasive surgery has replaced the open conventional surgery as the gold standard for many procedures. Here a modified technique was used for thyroid surgery with a 2.5-4.0 cm incision and the results of this technique have been evaluated. During the 3 years of study period, 14 patients underwent hemithyroidectomy using a small incision (2.5-4 cm), placed higher than the conventional incision in selected patients. Mean operative time was 86.2 minutes with an average blood loss of 42.5 ml with two conversions. Mean hospital stay was 32 hours and no drains were used. All patients were satisfied with the scar mark. We found this technique of minithyroidectomy to be feasible and easily reproducible.
Collapse
|
98
|
Mishra SK, Mohanty S, Satpathy SK, Mohapatra DN. Cerebral malaria in adults -- a description of 526 cases admitted to Ispat General Hospital in Rourkela, India. ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY 2007; 101:187-93. [PMID: 17362593 DOI: 10.1179/136485907x157004] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Although the clinical picture of cerebral malaria in children has been reported extensively, scant information is available about cerebral malaria in adults. This report relates to one of the largest series of adult cases of cerebral malaria patients ever described. At Rourkela, in eastern India, 526 adults (aged >12 years) who each satisfied the World Health Organization's criteria for cerebral malaria were admitted to Ispat General Hospital between 1995 and 2001. These cases represented 18% of the 2994 adult patients who were admitted with Plasmodium falciparum malaria over the same period. Most (76%) of the adult cases of cerebral malaria were male, 48% were aged 21-40 years, and only 4% were older than 60 years. The most common presenting symptoms were fever (97.7%), vomiting (54.6%), headache (30.8%) and seizures (17.1%). Most (62.4%) of the cases had associated severe complications: jaundice (47.5%), acute renal failure (28.9%), and/or severe anaemia (9.7%). Overall, 175 (23%) of the cases were fatal, mortality being particularly high (59%) among those with multi-organ failure. Of the fatal cases, 107 (61%) died within the first 24 h of hospitalization, presumably indicative of late presentation. As the management of multiple complications may be inadequate at primary centres, early referral to higher centres is recommended.
Collapse
|
99
|
Pradeep PV, Agarwal A, Baxi M, Agarwal G, Gupta SK, Mishra SK. Safety and efficacy of surgical management of hyperthyroidism: 15-year experience from a tertiary care center in a developing country. World J Surg 2007; 31:306-12; discussion 313. [PMID: 17219271 DOI: 10.1007/s00268-006-0572-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Ideal management of toxic goiter still remains elusive. Though surgical management of toxic multinodular goiter (MNG) is well accepted, surgical treatment of Graves' disease (GD) is still controversial in view of the presumed increased incidence of complications. In this paper, we discuss the experience of the surgical management of hyperthyroidism at a specialized tertiary care endocrine center in a developing country, highlighting the minimal morbidity and satisfactory outcome in experienced hands. MATERIALS AND METHODS We retrospectively reviewed 325 consecutive patients with hyperthyroidism managed surgically from 1990 to 2005. The etiologic diagnoses were Graves' disease (185), toxic MNG (105), and autonomously functioning thyroid nodules (AFTN) (n = 35). The indications for surgery in Graves' patients were large goiter, relapse after antithyroid drug therapy (ATD), Graves' ophthalmopathy, and presence of nodule. The indications for surgery in toxic MNG were retrosternal extension (n = 15), compressive symptoms (n = 20), and large size (grade II). Among the AFTN nodule size, those greater than 4 cm (85%) formed the major indication for surgery. Subjects with GD and toxic MNG were subjected to subtotal thyroidectomy (n = 93 prior to 1995) or total thyroidectomy (n = 205 post-1995). Hemithyroidectomy was the procedure of choice in patients with AFTN. RESULTS Patients with Graves' disease were younger in age, with shorter mean duration of goiter when compared with the other 2 groups. Eight percent of patients with Graves' disease without a clinically palpable nodule and 25% of those with nodules had associated differentiated carcinoma, including papillary, follicular, and medullary thyroid cancer. Four percent of patients with toxic MNG had malignancy. Complications included temporary hypocalcemia (24%), permanent hypocalcemia (3%), and permanent vocal-cord palsy (1%). CONCLUSIONS Surgery for hyperthyroidism has negligible mortality and acceptable morbidity in experienced hands. It is a definite option in selected cases. Immediate and permanent cure of hyperthyroidism is achieved, with no recurrences, after total thyroidectomy. The cosmetic outcome is good, with excellent patient satisfaction and acceptance.
Collapse
|
100
|
Mehrotra PK, Agarwal A, Kumar N, Mishra A, Agarwal G, Verma AK, Mishra SK. Comments on 'Technetium-99m-sestamibi subtraction scintigraphy vs. ultrasonography combined with a rapid parathyroid hormone assay in parathyroid aspirates in preoperative localization of parathyroid adenomas and in directing surgical approach'. Clin Endocrinol (Oxf) 2007; 66:899. [PMID: 17388797 DOI: 10.1111/j.1365-2265.2007.02795.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|