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31.
In Turkey, Leishmania infantum is responsible for human visceral leishmaniasis (VL), which is seen mainly in the Aegean, Mediterranean, and Central Anatolia Regions. This study aimed to determine asymptomatic infections in an endemic area of VL in Turkey using the western blot technique. A total of 82 persons including children and adults were chosen randomly in Denizli province which is one of the endemic sites for VL. Serum samples were collected and screened using indirect immunofluorescent test (IFAT), enzyme-linked immunosorbent assay (ELISA) and western blot (WB). One year later, 35 of the 82 persons were sampled and screened serologically for the second time. Seven out of 82 samples were found to be positive by western blot analysis with the presence of 14 and/or 18 kDa bands. Two of these seven sera were also positive by IFAT, but only one of these two was positive by ELISA. Only one person showing seropositivity with all three tests had clinical symptoms and was diagnosed as VL with the presence of amastigotes in bone marrow aspirate. Because six people, including the one found to be seropositive in all two tests, had no clinical symptoms, they were accepted as asymptomatic carriers. The ratio of asymptomatic infection was calculated as 7.41% (6/81) in the region. In the second sampling, the western blot revealed antibodies against the same antigens in all seven subjects. Our findings showed that the presence of antibodies against 14 and 18 kDa antigens are important for the diagnosis of symptomatic and asymptomatic infections. Western blot was found to be effective in the detection of asymptomatic persons in the epidemiological studies in endemic areas. 相似文献
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Guhl S Artuc M Neou A Babina M Zuberbier T 《Bioscience, biotechnology, and biochemistry》2011,75(2):382-384
Human skin mast cells proliferated in the presence of interleukin (IL)-4+SCF (expanding 18-fold in 8 weeks) and acquired profound responsiveness towards high affinity IgE receptor (FcεRI) cross-linking, liberating about 75% of their histamine. In a proof-of-concept, we found that these cells are useful for pharmacological testing. Even a subtle inhibition of degranulation can be visualized. This model might prove valuable in tests of novel anti-allergic drugs. 相似文献
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Sonya C. Bardswell Friederike Cuello Alexandra J. Rowland Sakthivel Sadayappan Jeffrey Robbins Mathias Gautel Jeffery W. Walker Jonathan C. Kentish Metin Avkiran 《The Journal of biological chemistry》2010,285(8):5674-5682
Protein kinase D (PKD), a serine/threonine kinase with emerging cardiovascular functions, phosphorylates cardiac troponin I (cTnI) at Ser22/Ser23, reduces myofilament Ca2+ sensitivity, and accelerates cross-bridge cycle kinetics. Whether PKD regulates cardiac myofilament function entirely through cTnI phosphorylation at Ser22/Ser23 remains to be established. To determine the role of cTnI phosphorylation at Ser22/Ser23 in PKD-mediated regulation of cardiac myofilament function, we used transgenic mice that express cTnI in which Ser22/Ser23 are substituted by nonphosphorylatable Ala (cTnI-Ala2). In skinned myocardium from wild-type (WT) mice, PKD increased cTnI phosphorylation at Ser22/Ser23 and decreased the Ca2+ sensitivity of force. In contrast, PKD had no effect on the Ca2+ sensitivity of force in myocardium from cTnI-Ala2 mice, in which Ser22/Ser23 were unavailable for phosphorylation. Surprisingly, PKD accelerated cross-bridge cycle kinetics similarly in myocardium from WT and cTnI-Ala2 mice. Because cardiac myosin-binding protein C (cMyBP-C) phosphorylation underlies cAMP-dependent protein kinase (PKA)-mediated acceleration of cross-bridge cycle kinetics, we explored whether PKD phosphorylates cMyBP-C at its PKA sites, using recombinant C1C2 fragments with or without site-specific Ser/Ala substitutions. Kinase assays confirmed that PKA phosphorylates Ser273, Ser282, and Ser302, and revealed that PKD phosphorylates only Ser302. Furthermore, PKD phosphorylated Ser302 selectively and to a similar extent in native cMyBP-C of skinned myocardium from WT and cTnI-Ala2 mice, and this phosphorylation occurred throughout the C-zones of sarcomeric A-bands. In conclusion, PKD reduces myofilament Ca2+ sensitivity through cTnI phosphorylation at Ser22/Ser23 but accelerates cross-bridge cycle kinetics by a distinct mechanism. PKD phosphorylates cMyBP-C at Ser302, which may mediate the latter effect. 相似文献
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Kafadar AM Ergen A Zeybek U Agachan B Kuday C Isbir T 《Cell biochemistry and function》2006,24(5):455-460
The purpose of this study was to demonstrate the relationship between serum PON1 activity and PON 192 polymorphism in brain tumours. The distribution of PON 192 polymorphism in 42 high grade gliomas and 42 meningiomas were determined by polymerase chain reaction--based restriction fragment length polymorphism analysis and compared with 50 healthy control subjects. Serum paraoxonase1 activities were also measured and compared in the same population. We found that in both tumour groups serum PON1 activity was significantly lower than the control group (p < 0.001), but did not differ between meningiomas and high grade gliomas. There was no significant difference either in distribution of the AA, AB and BB genotypes or in the allelic frequencies, between the patient group and control subjects (p > 0.05). Our results suggest that serum PON1 as a part of the lipid peroxidation scavenging systems might be involved in the tumourigenesis of brain tumours. 相似文献
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Ortak T Kerem M Uraloğlu M Unlü RE Inözü E Sensöz O 《Plastic and reconstructive surgery》2006,117(6):2082-3; author reply 2083-5
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M Serdar E Sertoglu M Uyanik S Tapan K Akin C Bilgi I Kurt 《Free radical research》2012,46(10):1291-1295
Abstract Background. Measurement of urinary 8-hydroxy-2'-deoxyguanosine (8-OHdG) has recently become more popular as a means of assessing oxidative stress in the human body. The aim of this study is to compare the levels of urine 8-OHdG in patients with type 2 diabetes with and without nephropathy and to evaluate its role as a biochemical marker for distinguishing these patients from healthy and patients without complications. Methods. For this purpose, 52 patients with type 2 diabetes mellitus (32 with nephropathy (DMN), 20 without nephropathy (DM)) and 20 healthy control subjects (C) were included in this study. The urine concentrations of 8-OHdG were measured by modified LC-MS/MS method and compared with the first morning voiding urine albumin/creatinine ratio (UACR) and HbA1c values of the same patients. Results. The concentrations of urine 8-OHdG in DMN and DM patients were higher than those of the control subjects (3.47?±?0.94, 2.92?±?1.73, 2.1?±?0.93 nmol/mol creatinine, respectively). But there was no statistical difference between DMN and DM (p =?0.115). There is significant correlation between urinary 8-OHdG and UACR (r =?0.501, p 0.001). According to ROC analysis, the AUC value of HbA1c was higher than the value of the AUC of 8-OHdG (0.882 and 0.771, respectively). Conclusions. This study shows that the urine 8-OHdG levels increase in diabetic patients. However, urinary 8-OHdG is not a useful clinical marker, compared with UACR, to predict the development of diabetic nephropathy in diabetic patients. 相似文献
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In 2007, the World Health Organization (WHO) received a criticism for a lack of transparency and systematic methods in the development of guidelines, which were at that time perceived as substantially driven by expert opinion. In this paper we assessed the quality of maternal and perinatal health guidelines developed since then. We used the Appraisal of Guidelines for Research and Evaluation (AGREE) II tool to evaluate the quality of methodological rigour and transparency of four different WHO guidelines published between 2007 and 2011. Our findings showed high scores among the most recent guidelines on maternal and perinatal health suggesting higher quality. However, there is still potential for improvement, especially in including different stakeholder views, transparency of guidelines regarding the role of the funding body and presentation of the guideline document. 相似文献