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Bulunan: 9 Adet 0.001 sn
Koleksiyon [4]
Tam Metin [1]
Yazar [20]
Yayın Türü [2]
Konu Başlıkları [20]
Yayın Tarihi [1]
Dergi Adı [6]
Yayıncı [6]
Dil [1]
Yazar Departmanı [1]
The effects of PON1 gene Q192R variant on the development of uterine leiomyoma in Turkish patients

Attar, Rukset | Atasoy, H. | Inal-Gültekin, G. | Timirci-Kahraman, Ö. | Güleç-Yilmaz, S. | Dalan, A.B. | İşbir, Turgay

Article | 2015 | In Vivo29 ( 2 ) , pp.243 - 246

Aim: This study aimed to analyze the relation between uterine leiomyoma (ULM) patients and p.Q192R polymorphism. Materials and Methods: ULM patients (n=76) and healthy women (n=103) were recruited from the Yeditepe University, Department of Gynecology and Obstetrics. The genotype and allele distribution of p.Q192R was analyzed by polymerase chain reaction and restriction fragment length polymorphism methods. Genotype and allele frequencies between study groups were calculated by the chisquare (?2) and Fischer's exact test. Results: The frequency of the B allele was lower in patients (p<0.001) and the AB genotype showed a decrease . . .d risk for ULM development (p<0.001). The variation was unrelated to ULM size and number. There was no significant difference between p.Q192R genotype frequencies and fibroid size and number. Conclusion: The heterogeneous AB genotype of PON1 p.Q192R variation could be recognized as a low-risk parameter for the development of ULM in Turkish women. © 2015, International Institute of Anticancer Research. All rights reserved Daha fazlası Daha az

Natural products are the future of anticancer therapy: Preclinical and clinical advancements of viscum album phytometabolites

Attar, Rukset | Tabassum, S. | Fayyaz, S. | Ahmad, M.S. | Nogueira, D.R. | Yaylim, I. | Ismail, M.

Article | 2015 | Cellular and Molecular Biology61 ( 6 ) , pp.62 - 68

Cancer is a multifaceted and genomically complex disease. Research over the years has gradually provided a near complete resolution of cancer landscape and it is now known that genetic/epigenetic mutations, inactivation of tumor suppressors, Overexpression of oncogenes, spatio-temporally dysregulated intracellular signaling cascades, epithelial to mesenchymal transition (EMT), metastasis and loss of apoptosis are some of the most extensively studied biological mechanisms that underpin cancer development and progression. Increasingly it is being realized that current therapeutic interventions are becoming ineffective because of tumor . . . heterogeneity and rapidly developing resistance against drugs. Considerable biological activities exerted by bioactive ingredients isolated from natural sources have revolutionized the field of natural product chemistry and rapid developments in preclinical studies are encouraging. Viscum album has emerged as a deeply studied natural source with substantial and multifaceted biological activities. In this review we have attempted to provide recent breakthroughs in existing scientific literature with emphasis on targeting of protein network in cancer cells. We partition this review into different sections, highlighting latest information from cell culture studies, preclinical and clinically oriented studies. We summarized how bioactive ingredients of Viscum album modulated extrinsic and intrinsic pathways in cancer cells. However, surprisingly, none of the study reported stimulatory effects on TRAIL receptors. The review provided in-depth analysis of how Viscum album modulated Endoplasmic Reticulum Stress in cancer cells and how bioactive chemicals tactfully targeted cytoskeletal machinery in cancer cells as evidenced by cell culture studies. It is noteworthy that Viscum album has entered into various phases of clinical trials, however, there are still knowledge gaps in our understanding regarding how various bioactive constituents of Viscum album modulate intracellular signaling cascades in cancer. Better and deeper comprehension oncogenic signaling cascades will prove to be helful in getting a step closer to individualized medicine. © 2015 Daha fazlası Daha az

Lack of influence of the ACE1 gene I/D polymorphism on the formation and growth of benign uterine leiomyoma in turkish patients

Gültekin, G.I. | Yilmaz, S.G. | Kahraman, Ö.T. | Atasoy, H. | Burak Dalan, A. | Attar, Rukset | İşbir, Turgay

Article | 2015 | Asian Pacific Journal of Cancer Prevention16 ( 3 ) , pp.1123 - 1127

Uterine leiomyomas (ULM), are benign tumors of the smooth muscle cells of the myometrium. They represent a common health problem and are estimated to be present in 30-70% of clinically reproductive women. Abnormal angiogenesis and vascular-related growth factors have been suggested to be associated with ULM growth. The angiotensin-I converting enzyme (ACE) is related with several tumors. The aim of this study was to identify possible correlation between ULM and the ACE I/D polymorphism, to evaluate whether the ACE I/D polymorphism could be a marker for early diagnosis and prognosis. ACE I/D was amplified with specific primer sets re . . .cognizing genomic DNA from ULM (n=72) and control (n=83) volunteers and amplicons were separated on agarose gels. The observed genotype frequencies were in agreement with Hardy-Weinberg equilibrium (?2=2.162, p=0.339). There was no association between allele frequencies and study groups (?2=0.623; p=0.430 for ACE I allele, ?2=0.995; p=0.339 for ACE D allele). In addition, there were no significant differences between ACE I/D polymorphism genotype frequencies and ULM range in size and number (?2=1.760; p=0.415 for fibroid size, ?2=0.342; p=0.843 for fibroid number). We conclude that the ACE gene I/D polymorphism is not related with the size or number of ULM fibroids in Turkish women. Thus it cannot be regarded as an early diagnostic parameter nor as a risk estimate for ULM predisposition Daha fazlası Daha az

Experimental treatments of endometriosis

Attar, Rukset | Attar, E.

Article | 2015 | Women's Health11 ( 5 ) , pp.653 - 664

Endometriosis is defined as the presence of endometrial gland and stroma outside the uterine cavity. It is an estrogen-dependent disease and is associated with chronic pelvic pain, dysmenorrhea, dyspareunia and infertility. The treatment of endometriosis is conservative or radical surgery, medical therapies or their combination. All currently used hormonally active treatments are effective in the treatment of endometriosis; however, the adverse effects of these hormonal treatments limit their long-term use. Moreover, recurrence rates are high after cessation of therapy, and the treatments have no benefit in endometriosis-associated . . .infertility. Therefore, researchers are working on new treatment modalities with improved side effects, mainly focusing on the molecular targets involved in etiopathogenesis of endometriosis. Here we summarized these novel treatments modalities. © 2015 Future Medicine Ltd Daha fazlası Daha az

The effects of electromagnetic fields on the number of ovarian primordial follicles: An experimental study

Bakacak, M. | Bostanci, M.S. | Attar, Rukset | Yildirim, O.K. | Yildirim, G. | Bakacak, Z. | Han, A.

Article | 2015 | Kaohsiung Journal of Medical Sciences31 ( 6 ) , pp.287 - 292

The aim of this study was to evaluate the effect of an electromagnetic field (EMF), generated close to the ovaries, on primordial follicles. A total of 16 rats were used in this study. The study group consisted of rats exposed to an EMF in the abdominal region for 15 min/d for 15 days. Both the study and control group were composed of eight rats. After the treatment period of 15 days, the ovaries of the rats were extracted, and sections of ovarian tissue were taken for histological evaluation. The independent samples t test was used to compare the two groups. In the study group, the means of the right and left ovarian follicle numbe . . .rs were 34.00 ± 10.20 and 36.00 ± 10.53, respectively. The average total ovarian follicle number was 70.00 ± 19.03. In the control group, the means of the right and left ovarian follicle numbers were 78.50 ± 25.98 and 71.75 ± 29.66, respectively, and the average total ovarian follicle number was 150.25 ± 49.53. The comparisons of the means of the right and left ovarian follicle numbers and the means of the total ovarian follicle numbers between the study and control groups indicated that the study group had significantly fewer follicles (p < 0.001, p = 0.011, and p = 0.002, respectively). This study found a significant decrease in the number of ovarian follicles in rats exposed to an EMF. Further clinical studies are needed to reveal the effects of EMFs on ovarian reserve and infertility. Copyright © 2015, Kaohsiung Medical University. Published by Elsevier Taiwan LLC. All rights reserved Daha fazlası Daha az

Citrus fruits and their bioactive ingredients: Leading four horsemen from front

Farooqi, A.A. | Wang, Z. | Hasnain, S. | Attar, Rukset | Aslam, A. | Mansoor, Q. | Ismail, M.

Note | 2015 | Asian Pacific Journal of Cancer Prevention16 ( 6 ) , pp.2575 - 2580

Cancer is a multifaceted and genomically complex disease and rapidly accumulating high impact research is deepening our understanding related to the mechanisms underlying cancer development, progression and resistance to therapeutics. Increasingly it is being realized that genetic/epigenetic mutations, inactivation of tumor suppressor genes, overexpression of oncogenes, deregulation of intracellular signaling cascades and loss of apoptosis are some of the extensively studied aspects. Confluence of information suggested that rapidly developing resistance to therapeutics is adding another layer of complexity and overwhelmingly increas . . .ing preclinical studies are identifying different natural agents with efficacy and minimal off-target effects. We partition this multi-component review into citrus fruits and their bioactive ingredients mediating rebalancing of pro- and anti-apoptotic proteins to induce apoptosis in resistant cancer cells. We also discuss how oncogenic protein networks are targeted in cancer cells and how these findings may be verified in preclinical studies Daha fazlası Daha az

TRAIL and Bortezomib: Killing cancer with two stones

Qureshi, M.Z. | Romero, M.A. | Attar, Rukset | Javed, Z. | Farooqi, A.A.

Article | 2015 | Asian Pacific Journal of Cancer Prevention16 ( 4 ) , pp.1671 - 1674

Cancer genomics and proteomics have undergone considerable broadening in the past decades and increasingly it is being realized that solid/liquid phase microarrays and high-throughput resequencing have provided platforms to improve our existing knowledge of determinants of cancer development, progression and survival. Loss of apoptosis is a widely and deeply studied process and different approaches are being used to restore apoptosis in resistant cancer phenotype. Modulating the balance between pro-apoptotic and anti-apoptotic proteins is essential to induce apoptosis. It is becoming more understood that pharmacological inhibition o . . .f the proteasome might prove to be an effective option in improving TRAIL induced apoptosis in cancer cells. Keeping in view rapidly accumulating evidence of carcinogenesis, metastasis, resistance against wide ranging therapeutics and loss of apoptosis, better knowledge regarding tumor suppressors, oncogenes, pro-apoptotic and anti-apotptic proteins will be helpful in translating the findings from benchtop to bedside Daha fazlası Daha az

Tumor infiltrating lymphocytes in ovarian cancer

Gasparri, M.L. | Attar, Rukset | Palaia, I. | Perniola, G. | Marchetti, C. | Di Donato, V. | Panici, P.B.

Article | 2015 | Asian Pacific Journal of Cancer Prevention16 ( 9 ) , pp.3635 - 3638

Several improvements in ovarian cancer treatment have been achieved in recent years, both in surgery and in combination chemotherapy with targeting. However, ovarian tumors remain the women's cancers with highest mortality rates. In this scenario, a pivotal role has been endorsed to the immunological environment and to the immunological mechanisms involved in ovarian cancer behavior. Recent evidence suggests a loss of the critical balance between immune-activating and immune-suppressing mechanisms when oncogenesis and cancer progression occur. Ovarian cancer generates a mechanism to escape the immune system by producing a highly sup . . .pressive environment. Immune-activated tumor infiltrating lymphocytes (TILs) in ovarian tumor tissue testify that the immune system is the trigger in this neoplasm. The TIL mileau has been demonstrated to be associated with better prognosis, more chemosensitivity, and more cases of optimal residual tumor achieved during primary cytoreduction. Nowadays, scientists are focusing attention on new immunologically effective tumor biomarkers in order to optimize selection of patients for recruitment in clinical trials and to identify relationships of these biomarkers with responses to immunotherapeutics. Assessing this point of view, TILs might be considered as a potent predictive immunotherapy biomarker Daha fazlası Daha az

The effects of different doses of melatonin treatment on endometrial implants in an oophorectomized rat endometriosis model

Cetinkaya, N. | Attar, Rukset | Yildirim, G. | Ficicioglu, C. | Ozkan, F. | Yılmaz, B. | Yesildaglar, N.

Article | 2015 | Archives of Gynecology and Obstetrics291 ( 3 ) , pp.591 - 598

Aims: To determine the effects of different doses of melatonin treatment on endometrial implants, the activity of antioxidant enzyme superoxide dismutase (SOD), the angiogenesis factor, the vascular endothelial growth factor (VEGF) and the waste metabolite product of lipid peroxidation malondialdehyde (MDA) in an oophorectomized rat endometriosis model.Methods: Thirty-two, female, non-pregnant, nulligravid Sprague–Dawley, albino rats were used in this prospective, randomized, controlled and experimental study. Endometriosis was surgically induced in oophorectomized rats, and estradiol treatment was started after the first operation . . .and continued till the end of the study. Second look, third look and necropsy operations were performed in the 2nd, 4th and 6th weeks. Mean volumes, histological scores and biochemical parameters were evaluated throughout the study.Results: The mean volumes of endometriotic foci were 98.8 mm3 ± 17.2 vs. 108.2 mm3 ± 17.5, 54.1 mm3 ± 15.6 vs. 25.8 mm3 ± 3.6, 42.8 mm3 ± 10.5 vs. 32.7 mm3 ± 6.0 and histopathological scores were 2.2 ± 0.2 vs. 1.7 ± 0.1, 2.6 ± 0.2 vs. 2.2 ± 0.2, 2.6 ± 0.1 vs. 2.7 ± 0.2 in the 10 vs. 20-mg/kg/day melatonin group at the end of the second, fourth and sixth weeks, respectively. When the groups were compared, no significant differences were seen in the histopathologic scores, SOD and VEGF levels between the groups. However, the endometriotic foci volumes were significantly decreased in both melatonin treatment groups with respect to the control group at the end of the fourth and sixth weeks. Moreover, the mean MDA levels were significantly lower in the control group than in the 10-mg/kg/day melatonin group at the end of the fourth and sixth weeks.Conclusion: Melatonin treatment resulted in the regression of endometriotic lesions in oophorectomized rats. Higher doses of melatonin treatment might be more effective in the regression of implants and improvement of histologic scores as well as in the precise evaluation of SOD, MDA and VEGF distributions in the rat experimental models. © 2014, Springer-Verlag Berlin Heidelberg Daha fazlası Daha az

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