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101.
Yurci A Guven K Torun E Gursoy S Baskol M Akgun H Ozbakir O Yucesoy M 《European journal of gastroenterology & hepatology》2007,19(9):811-815
Interferon therapy is the cornerstone of chronic hepatitis C treatment. Side effects of interferon include possible triggering or exacerbation of immune diseases in consequence of immunomodulatory effects. We describe the unique case, in which pyoderma gangrenosum and exacerbation of psoriasis were developed 8 weeks after pegylated interferon alpha 2a and ribavirin therapy in a 45-year-old woman. The therapy had to be stopped on account of pyoderma gangrenosum and exacerbation of psoriasis in spite of a biochemical response to the therapy for hepatitis C. The evolution was favorable after stopping treatment. Therefore, we propose this would suggest a possible autoimmune mechanism for the development of pyoderma gangrenosum and exacerbation of psoriasis with pegylated interferon therapy. A susceptible patient, who has an autoimmune disease before interferon therapy, had to be informed that interferons may induce de novo or exacerbate existing immune diseases by immunomodulatory actions. To the best of our knowledge, this is the first case report of pyoderma gangrenosum and psoriasis that resulted from pegylated interferon alpha 2a and ribavirin treatment of chronic hepatitis C. 相似文献
102.
Guven M Guven GS Oz E Ozaydin A Batar B Ulutin T Hacihanefioglu S Domanic N 《Heart and vessels》2007,22(6):355-360
Coronary artery disease (CAD) is a multifactorial process that appears to be caused by the interaction of environmental risk
factors with multiple predisposing genes. In this study, we investigated the effects of the XPD Lys751Gln and XRCC1 Arg399Gln
polymorphisms on the presence and the severity of CAD. We also investigated the presence of DNA damage in the peripheral lymphocytes
of patients with CAD by using the micronucleus (MN) test and the effect of XPD Lys751Gln and XRCC1 Arg399Gln polymorphisms
on this damage. The study population consisted of 147 patients with angiographically documented CAD and 48 healthy controls.
No association between XPD Lys751Gln or XRCC1 Arg399Gln polymorphisms and the presence or the severity of CAD was observed.
On the other hand, a significantly higher frequency of MN was observed in CAD patients compared with controls (5.7 ± 1.9 vs
5.0 ± 2.1, respectively, P = 0.018). We found an elevated frequency of MN in CAD patients with the XPD 751Gln allele (Gln/Gln genotype) or the XRCC1
399Gln (Arg/Gln or Gln/Gln genotypes) allele compared with the XPD 751Lys (Lys/Lys genotype) allele or XRCC1 399 Arg (Arg
/Arg genotype) allele, respectively. These preliminary results suggest that XPD Lys751Gln and XRCC1 Arg399Gln polymorphisms
may not be a significant risk factor for developing CAD. In addition, our results indicate that the MN frequency is associated
with presence, but not severity, of CAD and is related to the XRCC1 Arg399Gln and XPD Lys751Gln polymorphisms, suggesting
an elevated frequency of MN in CAD patients with the XPD 751Gln or XRCC1 399Gln alleles. 相似文献
103.
Fusun Sonat Ilker Ercan Senem Turan Ozdemir Guven Ozkaya Behzat Noyan 《Anatomical science international / Japanese Association of Anatomists》2009,84(4):298-304
In this study, we aimed to (1) propose landmarks for the hippocampus in a rat brain using an experimental study and (2) investigate
hippocampus shape changes in a rat brain with epilepsy using the statistical shape analysis method. We have used the statistical
shape analysis method to illustrate hippocampal shape deformation due to epilepsy. Statistical shape analysis is of increasing
interest to the neuroimaging community because of its potential for locating morphological changes. Nineteen rat brains (ten
healthy and nine epileptic) with hematoxylin and eosin images of the hippocampus were used. The results strongly indicated
that the normalized hippocampal shape of the epileptic group was different from the nonepileptic group; deformation was seen
most significantly in the medial regions of the cornu ammonis (CA1 and CA3) of the hippocampus. In conclusion, our landmark-based
methodology detected regional differences in the hippocampus in epilepsy. This study may serve as an initial reference for
future studies on shape alteration of the hippocampus associated with certain medical conditions. 相似文献
104.
Okan F Bereket G Nikain A Guven G 《Pediatric nephrology (Berlin, Germany)》2008,23(4):553-553; discussion 557
105.
Lin WY Guven A Juan YS Neuman P Whitbeck C Chichester P Kogan B Levin RM Mannikarottu A 《BJU international》2008,101(5):621-626
OBJECTIVE
To investigate the use of free‐radical generation as a result of protein carbonylation and nitrotyrosination to characterize the level of bladder dysfunction after partial bladder outlet obstruction (PBOO) and reversal.MATERIALS AND METHODS
We surgically created PBOO in male New Zealand White rabbits; after 4 weeks of PBOO, one group of six rabbits was assessed, while the PBOO was relieved in two additional groups of six rabbits each that were assessed at 4 and 8 weeks after relieving the PBOO. Six sham‐operated rabbits served as controls. Sedated rabbits were assessed by cystometry and the bladders were then removed for contractile, histological and molecular studies. Western blotting was used to determine the level of carbonylation and nitrotyrosination at the protein level.RESULTS
The PBOO group had significant decreases in the contractile responses to field stimulation, ATP, carbachol and KCl. The responses to all forms of stimulation increased significantly at 4 weeks after reversal, and further increased to near normal levels by 8 weeks. Similarly, compliance and cystometric values also returned to near normal values after reversal. The hypertrophied smooth muscle of the obstructed bladders regressed to near‐normal size. There was a significant increase in the level of carbonylation and nitrotyrosination after PBOO, and a progressive decrease in the 4‐week reversal groups, nearing control values by 8 weeks.CONCLUSIONS
Significantly increased carbonylation and nitrotyrosination levels after PBOO correlated with the severe dysfunction in the obstructed rabbits. Similarly, decreased levels of oxidation and nitration correlated with the functional recovery after reversal. 相似文献106.
Focal fibrocartilaginous dysplasia is an uncommon, benign bone lesion that causes deformity of the long bones in young children. It has most commonly been encountered in the proximal tibia, and very rarely in the long bones of the upper limb, that is, the proximal humerus, distal radius, ulna, and proximal phalanx. Only one case of focal fibrocartilaginous dysplasia of the proximal humerus has been reported previously. The present study reports two such additional cases that were diagnosed in late childhood. The clinical presentation and radiographic findings are described with an emphasis on the natural evolution of the disease. Limb-length discrepancy is anticipated in these children in the long-term follow-up and, therefore, surgical intervention should be considered in the treatment. 相似文献
107.
This case report involves a 60-year-old diabetic man who developed septic arthritis as a result of the pathogen Morganella morganii. The patient had complaints of elevated body temperature, malaise, rigors and pain in the left knee, despite no history of
trauma. On examination of the knee, erythema, warmth, tenderness and swelling was observed. Arthrocentesis performed on his
left knee indicated the presence of straw-coloured, cloudy fluid without crystals. Bacterial identification based on biochemical
and automated methods indicated the growth of M morganii. M morganii was also isolated sedimentafrom the exudate of a diabetic ulcer in the left foot, with antibiotic susceptibilities identical
to those from the knee effusion. This case indicates that M morganii may be considered as a possible cause of septic arthritis in diabetic patients, especially those with diabetic foot infections. 相似文献
108.
Lin WY Mannikarottu A Chichester P Guven A Johnson A Neuman P Juan YS Schuler C Kogan B Levin RM 《Journal of andrology》2008,29(2):164-171
Previous studies have demonstrated that partial bladder outlet obstruction (PBOO) in the rabbit induces an increase in corpus cavernosum smooth muscle (CCSM) tone, which may make it difficult for the CCSM to relax. Thus, to determine whether the corpus cavernosum restores relaxation after reversal of PBOO, we investigated the physiologic, histologic, and cell biology in penises obtained from rabbits 4 weeks and 8 weeks after reversal of PBOO. CCSM from bladder outlet-obstructed and obstruction-reversed rabbits showed significant decreases in the contractile responses to phenylephrine. The relaxation responses to electrical field stimulation (EFS), ATP, acetylcholine, and sodium nitroprusside (SNP) were decreased in obstructed and reversed for 4 weeks groups. By 8 weeks of reversal, the relaxation of CCSM was increased gradually in response to EFS, SNP, and acetylcholine. However, the response to ATP did not result in the relaxation of CCSM to control levels. The ratio of SM to collagen decreased after obstruction and remained low after reversal. Expression of both isoforms of Rho kinase (ROK) was increased in obstruction groups. At 4 weeks of reversal, the expression of ROK alpha remained at obstruction level, whereas ROK beta expression decreased in comparison with the obstruction group. By 8 weeks of reversal, expression of both ROK alpha and beta significantly decreased when compared with the obstruction group. These results suggested that the poor relaxation response at reversal of 4 weeks was associated with incomplete decreased expression of both isoforms of ROK, whereas the incomplete recovery of the CCSM relaxation response at reversal of 8 weeks may be associated with structural alterations in the CC and irreversible damage from PBOO. 相似文献
109.
Background/Purpose
This study was designed to investigate the effects of recombinant erythropoietin (EPO), a hormone widely used for treatment of uremic anemia, in rats subjected to testicular ischemia and reperfusion (I/R).Methods
Thirty-five male rats were divided into the following: control, sham operated, ischemia (I), I/R, and I/R + EPO groups. In the I group, 2 hours of left unilateral testicular torsion were performed, and in the I/R and I/R + EPO groups, an additional 2 hours of testicular detorsions were performed. The I/R + EPO group was pretreated intraperitoneally with EPO (500 IU/kg) before reperfusion. Testicular tissue samples were examined for biochemical and histopathologic parameters. Apoptotic cells in all testes were detected by terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling technique and caspase 3 immunohistochemistry.Results
At histopathologic examination, ischemic changes in primary spermatocytes were noted in all torted testes. Cellular damage and apoptosis were more severe in ischemic groups than the EPO-pretreated group. There were statistically significant differences in tissue biochemical parameters in the I and I/R groups compared with the I/R + EPO group.Conclusions
The results of the present study suggest that EPO exerts protective effects against I/R injury via the modulation of free radical scavenger's activities, which decreases lipid peroxidation levels and attenuation of apoptosis. 相似文献110.
Guven A Demirbag S Uysal B Topal T Erdogan E Korkmaz A Ozturk H 《Journal of pediatric surgery》2008,43(8):1474-1479