World Journal of Cancer and Oncology Research <p>World Journal of Cancer and Oncology Research(WJCOR) is an international peer-reviewed journal that publishes original and high-quality research papers in all areas of cancer and oncology. As an important academic exchange platform, scientists and researchers can know the most up-to-date academic trends and seek valuable primary sources for reference.</p> en-US World Journal of Cancer and Oncology Research Tight Junctions and Prostate Cancer <p>In this review proteins associated with tight junctions (TJs) is described with an emphasis on prostate cancer. Overall tight junctional proteins do not seem to play a decisive role in prostate carcinoma pathogenesis. Of TJ proteins, expression of some claudins show an association with clinical behaviour of the tumors. Claudin 1 expression appears to be related to a better prognosis partly due to its involvement in EMT abrogation. Claudin 3 and 4 are highly expressed in prostate cancer and their expression is associated with aggressive behaviour. Inhibition of claudin 8 promotes prostate carcinoma invasion and spread but studies are few. CPE has been known to bind to especially claudins 3 and 4 and cause cell lysis. Several experiments with modified CPE have been made in prostate cancer cell lines. Regardless of this effective CPE based human treatment for prostate cancer have not yet been developed.</p> Ylermi Soini Copyright (c) 2022 World Journal of Cancer and Oncology Research 2022-11-05 2022-11-05 39 53 Mental Health among Women after Mastectomy: The Role of Counselling <p>The aim of the present research through the study of the mastectomy experience of women with breast cancer, is the investigation of its consequences in women who took part, as well as the role of counseling therapy in promoting mental their health. Five women voluntarily participated in semi-structured interviews, which they had undergone mastectomy and attended counseling. For in the analysis of the interviews, the Phenomenological Analysis was used. From the analysis of the interviews, it became clear that mastectomy brings about both physical changes, from the sensation of breast loss, as well as changes in their mental world, as their mental health is directly affected in awareness of breast removal. Therefore, the provision of advisory support is one of the main factors contributing to the relief of psychological symptoms, controlling negative thoughts and reducing negative one’s emotions experienced by women. Through the therapeutic process the women besides promoting their mental health, know themselves better through the eyes of others (partner, family). The results of the research contribute significantly to the theoretical and objective understanding of the mastectomy experience, as they highlight important aspects of it her experience regarding the negative effects of mastectomy. Simultaneously highlight the special importance of providing psychological support in order to strengthening their mental world. Finally, they reveal its necessity conducting qualitative research to further explore and understand the experience of women who have undergone a mastectomy.</p> Paraskevi Theofilou Copyright (c) 2022 World Journal of Cancer and Oncology Research 2022-09-30 2022-09-30 8 18 5-fluorouracil Improves the Testicular Antioxidant Status and Alleviates Oxidative Stress in Male Albino Rats Treated with Cyclophosphamide <p>The therapeutic effect of Cyclophosphamide (CPA) is thus attributed to phosphoramide mustard and acrolein leads to the formation of high levels of reactive oxygen species (ROS), which results in decreased antioxidant activity<strong>.</strong> Excessive production of ROS could also culminate in oxidative stress<strong>.</strong> <strong>Objectives:</strong> This study aims to evaluate the effect of sub-lethal dose of the cyclophosphamide, 5-FU, combination of 5-FU, and CPA on testicular antioxidant status, and oxidative stress in male albino rats.<strong> Materials and Methods:</strong> Twenty-eight male adult rats were grouped randomly into four groups (n=5 each group). Group I (control): Rats were injected with saline intraperitoneally and at a dose of 1.0 ml/kg b.w. for 14 days. Group II cyclophosphamide (CPA): Cyclophosphamide at a dose of 10 mg/kg day by day through i.p. to rats for 14 days. Group III Fluorouracil (5-FU): 5-Fluorouracil at a dose of 10 mg/kg day by day in saline was given through i.p. to rats for 14 days. Group IV (CPA+5-FU): Rats were given CPA followed by 5-FU at a dose of 10 mg/kg per day (day by day) through i.p. to rats for 14 days. At the end of the experimental period, rats were anesthetized using light ether. Blood and testes tissue samples were taken and prepared for biochemical measurements. Biochemical parameters in rat serum and tissues were evaluated. <strong>Results:</strong> Individual injection of CPA and 5-FU to rats were reduced testes TAC, GSH concentration, GR, and CAT activities compared to control. However, the combination treatment of rats with 5-FU and CPA increased the levels of these non-enzymatic and enzymatic antioxidant compared with those treated with CPA alone. Also, results showed significantly increased TBARS and NO concentration in the testes of CPA treated rats when compared to normal ones, while 5-FU increased NO only compared with the control. <strong>Conclusion: </strong>It can be concluded that treatment of rats with CPA is associated with the production of free radicals that leads to hazardous alterations in certain non-enzymatic, and enzymatic functions. The increase in lipid peroxidation probably leads to the intracellular accumulation of ROS with the subsequent development of testes tissue injury. However, 5-FU and CPA combination could produce a significant amelioration in most cases for these changes, and it may be considered as a potentially useful candidate in the combination chemotherapy with CPA to combat oxidative stress mediated non target organs injury even if it was not a complete protection. Future work should consider combined chemotherapy regimens, as two or more mechanisms of action of chemotherapeutic drugs could be more powerful than one mechanism.</p> Rabia A M Yahya Azab Elsayed Azab Karema El.M. Shkal Ahmed M. Attia Mona A. Yehia Copyright (c) 2022 World Journal of Cancer and Oncology Research 2022-11-03 2022-11-03 29 38 Prognostic Value and Biological Significance of GUCY1A2 in Gastric Cancer: A Bioinformatics Analysis Base on TCGA Database <p><strong><em>Background. </em></strong>Guanylate cyclase 1 soluble subunit alpha 2 (<em>sGCα2</em>), also known as <em>GUCY1A2</em>, was reported to be upregulated and promoted tumorigenesis in cervical cancer. But whether <em>GUCY1A2</em> was abnormally expressed and its prognostic value in gastric cancer was unknown. The current study aimed to find out the prognostic value of <em>GUCY1A2</em> in gastric cancer by analyzing data from The Cancer Genome Atlas (TCGA) database. <strong><em>Methods.</em></strong> Wilcoxon signed-rank test, cox regression analysis and multivariant analysis were used to analyze the relationship between clinical characteristic and <em>GUCY1A2</em> expression level. Kaplan-Meier method was used to analyze the association of <em>GUCY1A2</em> and overall survival. Gene set enrichment analysis (GSEA) was used to identify <em>GUCY1A2</em>-related signaling pathway. <strong><em>Results.</em></strong> Compared to normal tissue, expression of <em>GUCY1A2</em> was significantly increased in gastric cancer (p&lt;0.001). Increased <em>GUCY1A2</em> was associated with advanced T stage (p=0.012) and poor survival (p=0.022). Univariate analysis showed that high <em>GUCY1A2 </em>expression was associated with a poor overall survival (HR:1.44, 95% confidence interval [CI]: 1.03-2.02, p=0.03). Multivariate analysis indicated that <em>GUCY1A3</em> remained an independent prognostic predictor of overall survival (HR:1.75, 95% confidence interval [CI]: 1.20-2.56, p=0.00). GSEA revealed that calcium signaling pathway, <em>MAPK </em>signaling pathway, <em>TGF-β</em> signaling pathway and <em>Wnt</em> signaling pathway were enriched in <em>GUCY1A2 </em>high expression phenotype. <strong><em>Conclusions.</em></strong> <em>GUCY1A2</em> maybe a potential prognostic predictor of poor survival in gastric cancer. But it need to be further validated clinically.</p> Min Wei Shan Huang Mengyuan Zhu Xiaofen Pan Copyright (c) 2022 World Journal of Cancer and Oncology Research 2022-10-15 2022-10-15 19 28 Epidemiological and Histopathological Features of Ocular Tumors in Bukavu, Democratic Republic of the Congo <p><strong><em>Introduction:</em></strong> The purpose of this study was to describe epidemiological and histopathological features of ocular tumors in Bukavu in the Democratic Republic of the Congo. <strong><em>Methods:</em></strong> it is a cross-sectional descriptive study of the analysis of 103 consecutive anatomical pieces taken after tumor removal from two ophthalmology services in Bukavu city from January 2018 to December 2020. <strong><em>Results:</em></strong> Children accounted for 40% of patients and ocular tumors were unilateral in 84.5% of cases. The most common locations were the retina (34.8%), conjunctiva (33.7%) and eyelids (22.8%). Benign tumors predominated (51.4%), followed by malignant tumors (37.9%), and undetermined tumors (15.5%). The main histological forms found were retinoblastoma (34.8%), conjunctival nevus (20.6%), and palpebral granuloma (16.3%). <strong><em>Conclusion:</em></strong> Ocular tumors are common in Bukavu. Histopathological examination remains essential to guide management to reduce the risk of recurrence and related complications.</p> Baudoin Budwaga Manwa Dany Biraheka Kabesha Olivier Mukuku Eric Heri Nabuloko Rolande Hadisi Nsimire Philippe Bianga Katchunga Zacharie Kibendelwa Tsongo Stanis Okitotsho Wembonyama Théophile Barhwamire Kabesha Raphaël Bulakali Chirimwami Copyright (c) 2022 World Journal of Cancer and Oncology Research 2022-08-24 2022-08-24 1 7