Alper Ata

Serum levels of cancer biomarkers in diabetic and non-diabetic proteinuric patients: a preliminary study

Abstract Background: Cancer biomarkers (CBs) can be used in early detection of several cancers as well as in detection of recurrence and following response to treatment. We aimed to investigate the levels of CBs in proteinuric patients with primary glomerular disease (PGD) and diabetes mellitus, and compare them with healthy controls. Methods: One hundred and two patients with untreated PGD, 62 proteinuric patients with diabetic nephropathy, and 84 healthy controls were enrolled. Levels of cancer antigen 125 (CA 125), cancer antigen 15–3 (CA 15–3), carcinoembriogenic antigen (CEA), α-fetoprotein (AFP), total prostate specific antigen (TPSA), free prostate specific antigen (FPSA) and carbohydrate antigen 19–9 (CA 19–9) were measured. Results: Compared to healthy controls, levels of CA 125, CA 15–3 and CA 19–9 were higher in patients with PGD and diabetic patients (all p<0.05), while levels of TPSA, FPSA, AFP and CEA were lower (all p<0.05). There was no correlation between levels of cancer biomarkers and serum fibrinogen and serum amyloid A protein levels (all p>0.05). Both urinary protein excretion rate and serum albumin levels were correlated with all CBs (all p<0.05). Conclusions: CBs levels seem to be changed in different proteinuric patients. This condition should be kept in mind when evaluating CBs levels in proteinuric patients.

Contribution of DOG1 expression to the diagnosis of gastrointestinal stromal tumors.

Gastrointestinal stromal tumors (GIST) are the most common mesenchymal tumors of the gastrointestinal tract, and the majority contain KIT or PDGFRA-activating mutations. However, up to 10% of GISTs are c-kit-negative. Antibodies with increased sensitivity and specificity for the detection of c-kit-negative GIST cases may be of value, especially because some of these cases may also benefit from tyrosine kinase inhibitor therapy. Hematoxylin and Eosin sections of 33 GISTs were re-examined in order to define histopathological criteria used in risk assessment of these tumors. Immunohistochemistry with a panel of antibodies [c-kit, DOG1 (discovered on GIST 1), CD34, smooth muscle actin (SMA), Desmin, S100 and Ki67] was performed on 5μm-thick paraffin sections of all tumors. Statistical analysis of immunohistochemical studies showed that DOG1 and CD117 were the most sensitive and specific antibodies in the diagnosis of GISTs. Other antibodies were unhelpful in confirming a diagnosis of GIST, but were particularly useful in the differential diagnosis. Reactivity for DOG1 may aid in the diagnosis of GISTs, which fail to express c-kit antigen, and lead to appropriate treatment with imatinib mesylate, an inhibitor of the KIT tyrosine kinase.

Impact of Surgery Type on Quality of Life in Breast Cancer Patients

OBJECTIVE Breast cancer can lead to alterations in quality of life of the patients. The aim of this study is to evaluate the changes in quality of life of the female patients who had undergone surgical treatment for breast cancer. MATERIALS AND METHODS A total of 250 female patients (breast-preserving surgery (BPS), n=27, 11%; modified radical mastectomy (MRM), n=194, 77%, and simple mastectomy (SM), n=29; 11%) aged between 28-55 years (47.4±6.4 yrs) were included in the study. Patient information, demographic characteristics, income, and treatment modalities applied were recorded. Validated Turkish versions of EORTC QLQ-C30, and EORTC-BR23 questionnaires were used for all patients. RESULTS Breast-preserving surgery has a more favorable impact on general well-being, physical role, cognitive, psychological, and social functions, and symptom scale scores. When the identical parameters were taken into consideration, relatively favorable outcomes of BPS on the patients were observed relative to mastectomized patients. Besides, though not statistically significant, BPS has more patient-friendly effects on sexual function and sexual satisfaction in comparison with mastectomy. Patients with advanced stage disease and elder patients had more unfavorable health related quality of life (HRQoL) scores than younger patients, and those in their early stages of breast cancer. CONCLUSION Quality of life of BPS patients is less adversely affected relative to mastectomized patients. In the decision-making process, quality of life should be taken into consideration.

Lack of Prognostic Significance of C-erbB-2 Expression in Low- and High- grade Astrocytomas

BACKGROUND Astrocytic tumors, the most common primary glial tumors of the central nervous system, are classified from low to high grade according to the degree of anaplasia and presence of necrosis. Despite advances in therapeutic management of high grade astrocytic tumors, prognosis remains poor. In the present study, the frequency and prognostic significance of c-erb-B2 in astrocytic tumors was investigated. MATERIALS AND METHODS Records of 72 patients with low- and high-grade astrocytic tumors were evaluated. The expression of C-erbB-2 was determined immunohistochemically and intensity was recorded as 0 to 3+. Tumors with weak staining (1+) or no staining (0) were considered Her-2 negative, while tumors with moderate (2+) and strong (3+) staining were considered Her-2 positive. RESULTS Of the 72 patients, 41 (56.9%) had glioblastoma (GBM), 10 (13.9%) had diffuse astrocytoma, 15 (20.8%) had anaplastic astrocytoma, 6 (8.3%) had pilocytic astrocytoma. C-erbB-2 overexpression was detected in the tumor specimens of 17 patients (23.6%). Six (8.3%) tumors, all GBMs, exhibited strong staining, 2 (2.7%) specimens, both GBMs, exhibited moderate staining, and 9 specimens, 5 of them GBMs (12.5%), exhibited weak staining. No staining was observed in diffuse astrocytoma and pilocytic astrocytoma specimens. Median overall survival of patients with C-erbB-2 negative and C-erbB-2 positive tumors were 30 months (95%CI: 22.5-37.4 months) and 16.9 months (95%CI: 4.3-29.5 months), respectively (p=0.244). CONCLUSIONS Although there was no difference in survival, C-erbB-2 overexpression was observed only in the GBM subtype.

Nephrotic syndrome associated with gemcitabine use in a patient with ovarian cancer

Summary Background: Here we present a patient who developed nephrotic syndrome associated with gemcitabine use. Case Report: Gemcitabine therapy was initiated following tumor recurrence in a patient with ovarian cancer, who was previously treated twice with carboplatin and paclitaxel. Radiological findings waned and tumor marker concentrations decreased after gemcitabine treatment. However, edema and ascites development was observed on the fifth treatment cycle. Laboratory results revealed increased blood urea nitrogen and creatinine levels, decreased serum albumin concentrations, and increased 24-hour urinary protein excretion. Renal biopsy findings were compatible with membranous glomerulonephritis. Gemcitabine administration was stopped and the cyclophosphamide and steroid therapy were initiated. The symptoms and findings disappeared after the cessation of gemcitabine and immunosuppressive treatment. Conclusions: Gemcitabine treatment may be associated with proteinuria to the extent of nephrotic syndrome.