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Chen A, Wang J, Wang Y, Jia Y, Gu J, Xie X, Pan D. Effects of pore size and residual Ag on electrocatalytic properties of nanoporous gold films prepared by pulse electrochemical dealloying. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.10.081] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Pan D, Graneri J, Bettucci L. Correlation of rainfall and levels of deoxynivalenol in wheat from Uruguay, 1997-2003. FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE 2014; 2:162-5. [PMID: 24785179 DOI: 10.1080/02652030903213886] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
A total of 286 wheat samples for human consumption collected during 1997-2003 from four wheat-producing localities of south-western Uruguay were screened for deoxynivalenol (DON). Quantification was carried on by an immunochemical method using immunoaffinity columns and fluorimetric detection. The incidence of DON was high during the whole survey (58.5-100%), except in 1998 and 1999 in which no contamination occurred. During 2001 and 2002, 100% of samples contained detectable levels of DON, being the mean DON contents 6593 and 5880 µg kg(-1), respectively. The annual maximum levels ranged from 8800 to 11,400 µg kg(-1). A positive correlation between DON levels and precipitation was seen. The 70% of wheat samples destined for human consumption were contaminated with DON. To avoid the introduction of contaminated materials into the food chain process, the adoption of regular screening of the DON level in wheat is recommended, particularly in years with heavy rainfall during the flowering-to-early stages of grain maturity months.
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Pan D. Markov Model-Based Economic Evaluation of Combination Therapy with Ezetimibe and Statin Monotherapy. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2014; 17:A761. [PMID: 27202785 DOI: 10.1016/j.jval.2014.08.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Xia Y, Xia Y, Xu K, Ma Y, Pan D, Xu T, Lu L, Li D. Predictive value of the novel risk score BETTER (BiomarkErs and compuTed Tomography scorE on Risk stratification) for patients with unstable angina. Herz 2014; 40 Suppl 1:43-50. [PMID: 25171840 DOI: 10.1007/s00059-014-4141-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 07/09/2014] [Accepted: 07/15/2014] [Indexed: 10/24/2022]
Abstract
BACKGROUND The Braunwald classification and TIMI (Thrombolysis In Myocardial Infarction) risk score are used to stratify cardiovascular risk in patients with unstable angina (UA). However, these scores have a limited capacity in the practice of cardiology. OBJECTIVES This study sought to develop a new score, based on blood biomarkers and coronary computed tomographic angiography (CCTA) characteristics, for patients with UA. PATIENTS AND METHODS The study group consisted of 201 patients with confirmed UA. Follow-up time was 1 year; major adverse cardiac events (MACEs) included cardiovascular death, recurrent acute coronary syndrome (ACS), and re-admission to hospital. Blood biomarkers including high-sensitivity cardiac troponin T (Hs-cTnT), high-sensitivity C-reactive protein (Hs-CRP), myeloperoxidase (MPO) N-terminal pro-B-type natriuretic peptide (NT-proBNP), and ischemia-modified albumin (IMA) were measured. CCTA characteristics such as stenosis, plaque, epicardial fat volume (EFV), and calcification were evaluated. After analysis of relationships, the novel risk BETTER (BiomarkErs and compuTed Tomography scorE on Risk stratification) score was assessed in 201 patients. RESULTS In all, 25 MACEs (12.44 %) occurred: 2 cardiac deaths (1.00 %), 13 non-fatal myocardial infarctions (6.47 %), 10 recurrent ACS and re-admission in hospital (4.96 %). Serum levels of MPO, NT-proBNP, Hs-TnT, Hs-CRP, and IMA were correlated with MACEs (r = 0.20, r = 0.40, r = 0.18, r = 0.24, p < 0.01, respectively; r = 0.12, p > 0.05). CCTA characteristics of stenosis, plaque, EFV, and calcification were significantly correlated with MACEs (r = 0.53, r = 0.57, r = 0.42, and r = 0.52, all p < 0.01 respectively) and were significantly higher in the MACEs group than in the non-MACEs group. Thus, a new risk score was created combining biomarkers and CCTA statistics into a Cox multivariable for risk prediction of 1-year MACEs: BETTER risk score = MPO•0.1 + Hs-TnT•50 + Hs-CRP•0.4 + stenosis•9 + plaque•13 + EFV•0.2. The areas under the curve (AUC) for the prediction by Hs-cTnT, Hs-CRP, and MPO were 0.536 (95 % CI 0.409-0.662), 0.745 (95 % CI 0.641-0.850), and 0.650 (95 % CI 0.541-0.760), respectively. The AUC for the prediction of CCTA characteristics of stenosis, plaque, and EFV were 0.905 (95 % CI 0.860-0.950), 0.912 (95 % CI 0.867-0.957), and 0.835 (95 % CI 0.752-0.917), respectively. In addition, the AUC was 0.621 (95 % CI 0.492-0.750) for the Braunwald classification and 0.680 (95 % CI 0.559-0.801) for the TIMI score. The AUC for the BETTER risk score was 0.937 (95 % CI 0.902-0.972). CONCLUSION The BETTER risk score is new tool specifically developed for patients with UA. The score displays higher prediction accuracy in terms of discrimination and calibration than other currently available scores for risk stratification.
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Zhang ZG, Yang G, Pan D, Liang CH. Efficacy of endoscopic stapled transanal rectal resection for the treatment of rectocele. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2014; 18:3921-3926. [PMID: 25555885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE The objective of the study was to determine the efficacy of endoscopic stapled transanal rectal resection for the treatment of rectocele. PATIENTS AND METHODS For this purpose, the data were collected from 61 patients with severe rectocele that underwent endoscopic stapled transanal rectal resection within the time period from April 2010 to April 2012. The pre- and post-operative Longo's obstructed defecation syndrome (ODS) were compared. The reduction of the rectocele was assessed by defecography on visit and from patients' satisfaction obtained through following up. RESULTS We found that the postoperative Longo's ODS was significantly lower than the preoperative value (p < 0.01); and defecography showed that the rectocele was significantly reduced or disappeared. Furthermore, 57 of the 61 (93.4%) patients expressed their satisfaction at follow up. CONCLUSIONS The endoscopic stapled transanal rectal resection can be recommended as the treatment of choice for rectocele since it is an easy-to-perform procedure that has satisfactory short and mid to long-term therapeutic efficacy.
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Zhu C, Du F, Jiao Q, Wang X, Chen A, Liu F, Pan D. Microstructure and strength of pure Cu with large grains processed by equal channel angular pressing. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.matdes.2013.05.029] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Nie SH, Chin YY, Liu WQ, Tung JC, Lu J, Lin HJ, Guo GY, Meng KK, Chen L, Zhu LJ, Pan D, Chen CT, Xu YB, Yan WS, Zhao JH. Ferromagnetic interfacial interaction and the proximity effect in a Co2FeAl/(Ga,Mn)As bilayer. PHYSICAL REVIEW LETTERS 2013; 111:027203. [PMID: 23889435 DOI: 10.1103/physrevlett.111.027203] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Indexed: 06/02/2023]
Abstract
The magnetic properties of a Co2FeAl/(Ga,Mn)As bilayer epitaxied on GaAs (001) are studied both experimentally and theoretically. Unlike the common antiferromagnetic interfacial interaction existing in most ferromagnet-magnetic semiconductor bilayers, a ferromagnetic interfacial interaction in the Co2FeAl/(Ga,Mn)As bilayer is observed from measurements of magnetic hysteresis and x-ray magnetic circular dichroism. The Mn ions in a 1.36 nm thick (Ga,Mn)As layer remain spin polarized up to 400 K due to the magnetic proximity effect. The minor loops of the Co2FeAl/(Ga,Mn)As bilayer shift with a small ferromagnetic interaction field of +24 Oe and -23 Oe at 15 K. The observed ferromagnetic interfacial coupling is supported by ab initio density functional calculations. These findings may provide a viable pathway for designing room-temperature semiconductor spintronic devices through magnetic proximity effect.
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Sudhinaraset A, Pan D, Alexander C, Khorram O. Are There Inequalities in Fertility Service Utilization?: A Comparison of Impaired Fecundity Women Who Seek Care and Those Who Do Not Seek Care from the National Survey of Family Growth (NSFG). Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Barman SN, Pan D, Vosgueritchian M, Zoombelt AP, Galli G, Bao Z. Dispersion of single walled carbon nanotubes in amidine solvents. NANOTECHNOLOGY 2012; 23:344011. [PMID: 22885377 DOI: 10.1088/0957-4484/23/34/344011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The excellent electronic and material properties of single walled carbon nanotubes (SWNTs) makes this nanomaterial very attractive for incorporation into flexible and stretchable electronics. However, the widespread application of SWNTs in electronic devices is still limited. To purify, process and place SWNTs, appropriate solvents for dispersion are needed. However, a fundamental understanding of the reasons why certain solvents are capable of dispersing SWNTs is still missing. Here we report on two new potential solvents containing amidine moieties, 1,8-diazabicycloundec-7-ene (DBU) and 1,5-diazabicyclo(4.3.0)non-5-ene (DBN). Even though these solvents' molecular structures differ by only two -CH(2)- groups, we found that DBU is capable of dispersing SWNTs, while DBN is not. We carried out density functional theory (DFT) calculations to investigate the interaction between DBU and DBN, and we elucidated the reasons for the different performances of the two solvents. DBU has a preferential edge-on interaction with the SWNT, thus allowing for a higher solvent coverage than DBN. In addition, the CH(2)-SWNT interaction present for DBU substantially increases the adsorption energy compared to DBN. Our results point to the important interplay between the interaction of pi electrons, nitrogen lone pairs and the -CH(2)- groups present in aprotic solvent molecules and the delocalized pi electrons in SWNTs.
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Salins N, Krishnamurthi N, Santiago A, Dhall R, Moguel-Cobos G, Sadreddin A, Husain S, Lieberman A, Pan D, Dhanani S. Gait and Posture Control Impairments Predict Falls in Parkinson's Disease (P06.049). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p06.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Lieberman A, Krishnamurthi N, Santiago A, Dhall R, Moguel-Cobos G, Sadreddin A, Husain S, Salins N, Pan D, Dhanani S. Is Difficulty with Balance Different from Difficulty Walking in Parkinson's Disease? (P06.047). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p06.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Lieberman A, Krishnamurthi N, Santiago A, Dhall R, Moguel-Cobos G, Sadreddin A, Husain S, Salins N, Pan D, Dhanani S. Effects of Bradykinesia and Hypokinesia on Falls in Parkinson's Disease (P06.048). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p06.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Husain S, Krishnamurthi N, Santiago A, Dhall R, Moguel-Cobos G, Sadreddin A, Salins N, Pan D, Lieberman A, Dhanani S. The Value of the Barrow Neurological Institute Balance Scale in Predicting Falls (P06.043). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p06.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Teng BS, Wang CD, Zhang D, Wu JS, Pan D, Pan LF, Yang HJ, Zhou P. Hypoglycemic effect and mechanism of a proteoglycan from ganoderma lucidum on streptozotocin-induced type 2 diabetic rats. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2012; 16:166-175. [PMID: 22428467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND AND OBJECTIVES Diabetes mellitus inducing a leading cause of morbidity are widespread in the entire globe. The present study was to investigate the antidiabetic potency and mechanism of a proteoglycan extract, named FYGL (Fudan-Yueyang-G. lucidum), from the fruiting bodies of Ganoderma Lucidum as published recently, using streptozotocin-induced type 2 diabetic mellitus (T2DM) rats. MATERIAL AND METHODS The T2DM model rats were treated with FYGL as well as metformin and rosiglitazone. The levels of plasma glucose and insulin were measured, and the expression and activity of the protein tyrosine phosphatase 1B (PTP1B) and the tyrosine phosphorylation level of the insulin receptor (IR) 3-subunit in the livers and skeletal muscles of the T2DM rats were analyzed by immunoprecipitation and Western blotting methods. In addition, the levels of free fatty acid and serum lipid profile were measured using commercial kits for those trailed rats. RESULTS The decrease in fasting plasma glucose and the increase in insulin concentration dose- and time-dependently in the T2DM rats treated by FYGL, comparable with that by the clinical drugs, metformin and rosiglitazone. The levels of the PTP1B expression and activity were decreased, and the tyrosine phosphorylation level of the IR 1-subunit was increased in the skeletal muscles of the T2DM rats. Furthermore, FYGL significantly decreased the levels of free fatty acid, triglyceride, total cholesterol and low density lipoprotein-cholesterol as well as increased the level of high density lipoprotein-cholesterol. DISCUSSION It is suggested that the hypoglycemic mechanisms of FYGL are caused by inhibition of the PTP1B expression and activity, consequently, regulation of the tyrosine phosphorylation level of the IR 13-subunit. As those results, FYGL also controlled the plasma biochemistry indexes relative to the type 2 diabetes-accompanied metabolic disorders. This is possibly the first report on the underlying mechanisms responsible for the antidiabetic effect of Ganoderma lucidum.
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MESH Headings
- Animals
- Blood Glucose/metabolism
- Blotting, Western
- Diabetes Mellitus, Experimental/chemically induced
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Type 2/chemically induced
- Diabetes Mellitus, Type 2/drug therapy
- Fatty Acids, Nonesterified/blood
- Fruiting Bodies, Fungal/chemistry
- Hypoglycemic Agents
- Insulin/blood
- Lipids/blood
- Liver/metabolism
- Male
- Metformin/pharmacology
- Muscle, Skeletal/metabolism
- Protein Tyrosine Phosphatase, Non-Receptor Type 1/biosynthesis
- Proteoglycans/pharmacology
- Rats
- Rats, Sprague-Dawley
- Reishi/chemistry
- Rosiglitazone
- Thiazolidinediones/pharmacology
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Pan D, Chan M, Deng S, Xia L, Xu X. Numerical studies on the microclimate around a sleeping person and the related thermal neutrality issues. ERGONOMICS 2011; 54:1088-1100. [PMID: 22026952 DOI: 10.1080/00140139.2011.611896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This article reports on two numerical studies on the microclimate around, and the thermal neutrality of, a sleeping person in a space installed with a displacement ventilation system. The development of a sleeping computational thermal manikin (SCTM) placed in a space air-conditioned by a displacement ventilation system is first described. This is followed by reporting the results of the first numerical study on the microclimate around the SCTM, including air temperature and velocity distributions and the heat transfer characteristics. Then the outcomes of the other numerical study on the thermal neutrality of a sleeping person are presented, including the thermal neutrality for a naked sleeping person and the effects of the total insulation value of a bedding system on the thermal neutrality of a sleeping person. STATEMENT OF RELEVANCE: The thermal environment would greatly affect the sleep quality of human beings. Through developing a SCTM, the microclimate around a sleeping person has been numerically studied. The thermal neutral environment may then be predicted and contributions to improved sleep quality may be made.
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Watkins M, Pan D, Wang EG, Michaelides A, VandeVondele J, Slater B. Large variation of vacancy formation energies in the surface of crystalline ice. NATURE MATERIALS 2011; 10:794-8. [PMID: 21892176 DOI: 10.1038/nmat3096] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 07/11/2011] [Indexed: 05/11/2023]
Abstract
Resolving the atomic structure of the surface of ice particles within clouds, over the temperature range encountered in the atmosphere and relevant to understanding heterogeneous catalysis on ice, remains an experimental challenge. By using first-principles calculations, we show that the surface of crystalline ice exhibits a remarkable variance in vacancy formation energies, akin to an amorphous material. We find vacancy formation energies as low as ~0.1-0.2 eV, which leads to a higher than expected vacancy concentration. Because a vacancy's reactivity correlates with its formation energy, ice particles may be more reactive than previously thought. We also show that vacancies significantly reduce the formation energy of neighbouring vacancies, thus facilitating pitting and contributing to pre-melting and quasi-liquid layer formation. These surface properties arise from proton disorder and the relaxation of geometric constraints, which suggests that other frustrated materials may possess unusual surface characteristics.
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Bandyopadhyay S, Das S, Baruah KK, Chakravarty P, Chakrabarty D, Sarkar T, Pal B, De S, Pan D, Bera AK, Bandyopadhyay S, Bhattacharya D. Detection of bovine herpesvirus 1 sequences in yaks (Bos grunniens) with keratoconjunctivitis, using a highly sensitive nested polymerase chain reaction. REV SCI TECH OIE 2011; 29:695-703. [PMID: 21309468 DOI: 10.20506/rst.29.3.2009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Thirty-seven yaks (Bos grunniens) with keratoconjunctivitis and 22 healthy yaks were used to investigate the role of bovine herpesvirus 1 (BoHV-1) in keratoconjunctivitis in yaks. Nucleic acid sequences of BoHV-1 glycoproteins B and E were detected in conjunctival swabs from all yaks with keratoconjunctivitis using a nested polymerase chain reaction (PCR). In 21 yaks, BoHV-1 sequences were detected along with Moraxella bovis (M. bovis) and Neisseria spp. The amplified BoHV-1 sequences were identical, and no nucleotide variation was observed when compared with a BoHV-1 reference strain using single-strand conformation polymorphism analysis of the amplified DNA sequences. Interestingly, BoHV-1 sequences could not be detected in samples from healthy yaks. However, conjunctival swabs from two healthy yaks (9.09%) yielded M. bovis and Neisseria spp. Samples from 35 yaks with keratoconjunctivitis showed positive reactions in an avidin biotin enzyme-linked immunosorbent assay for BoHV-1 antibodies; all the healthy yaks were seronegative. This is the first report of a possible association of BoHV-1 with keratoconjunctivitis in yaks.
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Starr DE, Pan D, Newberg JT, Ammann M, Wang EG, Michaelides A, Bluhm H. Acetone adsorption on ice investigated by X-ray spectroscopy and density functional theory. Phys Chem Chem Phys 2011; 13:19988-96. [DOI: 10.1039/c1cp21493d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Fong A, Leake J, Pan D, Ogunyemi D. Demographic, institutional and obstetrical risk factors for postpartum haemorrhage mortality. J OBSTET GYNAECOL 2010; 30:470-5. [PMID: 20604649 DOI: 10.3109/01443615.2010.487576] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study, initially presented at the SMFM Annual Conference in San Diego on 29 January 2009, sought to explore the risk factors for mortality from postpartum haemorrhage (PPH). A total of 138,316 cases of PPH from 1991 to 2000 were identified using the California Health Discharge Database. Data analysed included demographic information and clinical risk factors. PPH increased from 1.9% to 2.8%, while mortality rate decreased during the study period (1991-2000). Logistic regression showed that hysterectomy, hypertensive disorders, abruption, transverse caesarean delivery, and classical caesarean delivery, increased risk for PPH mortality, while manual placental extraction, episiotomy, and laceration repairs decreased risk. Two geographical regions, Inland Empire and Orange County, were associated with increased PPH mortality, despite having lower incidence of PPH. Teaching status and investor ownership of hospitals increased the risk of PPH mortality. There was no associated change in mortality based on hospital quality rating.
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Tang J, Li X, Wang H, Hu X, Gao W, Wang J, Pan D, Ke Y. e0497 Clinical evaluation on the safety and therapeutic efficacy of Excel drug-eluting stent. BRITISH HEART JOURNAL 2010. [DOI: 10.1136/hrt.2010.208967.497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Pan D, Bera AK, Bandyopadhyay S, Das S, Rana T, Das SK, Bandyopadhyay S, Manna B, Bhattacharya D. Molecular characterization of antigen B2 subunit in two genotypes of Echinococcus granulosus from Indian bubaline isolates, its stage specific expression and serological evaluation. Mol Biol Rep 2010; 38:2067-73. [PMID: 20852940 DOI: 10.1007/s11033-010-0332-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Accepted: 09/03/2010] [Indexed: 03/08/2023]
Abstract
Echinococcus granulosus is a parasitic helminth which affects both man and animals. During infection with larval stage of the organism secretory and membrane-bound (S/M) proteins play a meaningful role for evasion of immune system. Antigen B (AgB) is one of them. Present investigation has defined sequence diversity of AgB2 subunit of cattle and buffalo isolates of the organism. A total of 55 isolates were screened by polymerase chain reaction based single stranded conformation polymorphism (PCR-SSCP). Subsequently, six conformers could be detected. Based on predicted amino acid sequences of 90 amino acid residues, three clusters could be deduced. Sequence information of two buffalo isolates was homologous to AgB4 indicating gene switching phenomenon in between closely related isoforms. Numerical value of Tajima's D test proved negative selection pressure. Using artificial neural network (ANN), B cell linear epitope and stretches of agretope were predicted. Three clusters could be defined on the basis of B cell linear epitope. Out of three clusters, two showed more than 50% binding propensity with same MHCII alleles whereas, cluster 3 exhibited binding propensity with other MHCII alleles (DRB1_1501, DRB1_1502). Relative expression of AgB2 was more in active cysts (1.636 ± 0.092) followed by degenerating (0.449 ± 0.037) and calcified (0.255 ± 0.008). This result suggested that relative expression of AgB2 declines with progression of the disease. Using recombinant AgB2 sensitivity, specificity and accuracy of the ELISA test was 96.7, 94.7 and 95.9%, respectively. No cross reactivity was found with common cestode and trematode infected cattle and buffalo because cross reactive antigen was expressed intracellularly. Finally, this was concluded that AgB2 is the suitable immunological marker for detection, diagnosis and progression of the disease.
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Bera AK, Bhattacharya D, Pan D, Manna B, Bandyopadhyay S, Das SK. Effect of heat killed Mycobacterium phlei on body weight gain and management of caecal coccidiosis in broiler chickens. Res Vet Sci 2010; 89:196-9. [PMID: 20347460 DOI: 10.1016/j.rvsc.2010.03.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2007] [Revised: 02/28/2010] [Accepted: 03/08/2010] [Indexed: 11/26/2022]
Abstract
The objective of this study was to evaluate the immunotherapeutic potential of heat killed Mycobacterium phlei in broiler chicken against experimentally produced Eimeria tenella infection. The selected dose of E. tenella oocyst (5x10(3) sporulated oocysts per bird) was capable of producing a mild form of caecal coccidiosis as observed by significant difference in body weight gain, clinical findings and caecal lesion score. Heat killed M. phlei was fed orally at 10 mg per bird with sterile PBS vehicle at alternate day for four doses. Our study reveals that per day body weight gain was significantly (p<0.01) higher for healthy control compared to coccidia infected group. The group fed M. phlei along with coccidial challenge showed significantly (p<0.05) higher body weight gain than infected control group. Heat killed M. phlei feeding also found effective to reduce the caecal lesion score significantly (p<0.05) in comparison to E. tenella infected untreated group. IgA concentrations in serum and bile at 7-day post challenge of coccidial oocyst was also significantly (p<0.01) higher in M. phlei fed group when compared to coccidia infected and healthy control group. We concluded that use of heat killed M. phlei has a beneficial role as an immunostimulant against caecal coccidiosis in broiler chicken.
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Pan D. A newly discovered viral enzyme capable of alteration of nucleic acid structure via phosphotriester and phosphodiester bonding complex: An event leading to a new frontier of research and development for viral diseases. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Pan D, Roessl E, Proksa R, Schlomka JP, Caruthers SD, Scott MJ, Senpan A, Gaffney PJ, Wickline SA, Lanza GM. CMR2009: 9.04: Multicolored (spectral) CT molecular imaging: the next step in CT imaging. CONTRAST MEDIA & MOLECULAR IMAGING 2009. [DOI: 10.1002/cmmi.346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Jackson L, Shaheen M, Heslin K, Pan D. Racial/Ethnic Differences in the Prevalence of Childhood Caries and Parental Perception of Need for Dental Treatment and Preventive Services. Ann Epidemiol 2009. [DOI: 10.1016/j.annepidem.2009.07.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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