Araştırma Çıktıları
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Item Efficacy and safety profile of COVID-19 vaccine in cancer patients: a prospective, multicenter cohort study(FUTURE MEDICINE LTD, 2022-01-01) Yasin, Ayse Irem; Aydin, Sabin Goktas; Sumbul, Bilge; Koral, Lokman; Simsek, Melih; Geredeli, Caglayan; Ozturk, Akin; Perkin, Perihan; Demirtas, Derya; Erdemoglu, Engin; Hacibekiroglu, Ilhan; Cakir, Emre; Tanrikulu, Eda; Coban, Ezgi; Ozcelik, Melike; Celik, Sinemis; Teker, Fatih; Aksoy, Asude; Firat, Sedat T.; Tekin, Omer; Kalkan, Ziya; Turken, Orhan; Oven, Bala B.; Dane, Faysal; Bilici, Ahmet; Isikdogan, Abdurrahman; Seker, Mesut; Turk, Haci M.; Gumus, MahmutAim: To compare the seropositivity rate of cancer patients with non-cancer controls after inactive SARS-CoV-2 vaccination (CoronaVac) and evaluate the factors affecting seropositivity. Method: Spike IgG antibodies against SARS-CoV-2 were measured in blood samples of 776 cancer patients and 715 non-cancer volunteers. An IgG level >= 50 AU/ml is accepted as seropositive. Results: The seropositivity rate was 85.2\% in the patient group and 97.5\% in the control group. The seropositivity rate and antibody levels were significantly lower in the patient group (p < 0.001). Age and chemotherapy were associated with lower seropositivity in cancer patients (p < 0.001). Conclusion: This study highlighted the efficacy and safety of the inactivated vaccine in cancer patients. Clinical Trials Registration: ClinicalTrials.gov) Plain language summary Cancer patients are at high risk for infection with SARS-CoV-2 and of developing the associated disease, COVID-19, which therefore puts them in the priority group for vaccination. This study evaluated the efficacy and safety of CoronaVac, an inactivated virus vaccine, in cancer patients. The immune response rate, defined as seropositivity, was 85.2\% in the cancer patient group and 97.5\% in the control group. The levels of antibodies, which are blood markers of immune response to the vaccine, were also significantly lower in the patient group, especially in those older than 60 years and receiving chemotherapy. These results highlight the importance of determining the effective vaccine type and dose in cancer patients to protect them from COVID-19 without disrupting their cancer treatment.Item History of the Rare Cancer Network and past research(PAGEPRESS PUBL, 2014-01-01) Mirimanoff, Rene-Olivier; Ozsahin, Mahmut; Thariat, Juliette; Ozyar, Enis; Schick, Ulrike; Pehlivan, Berrin; Krengli, Marco; Pellanda, Alessandra Franzetti; Vees, Hansjoerg; Cai, Ling; Scandolaro, Luciano; Belkacemi, Yazid; Villa, Salvador; Igdem, Sefik; Lutsyk, Myroslav; Miller, Robert C.Approximately, twenty years ago, the Rare Cancer Network (RCN) was formed in Lausanne, Switzerland, to support the study of rare malignancies. The RCN has grown over the years and now includes 130 investigators from twenty-four nations on six continents. The network held its first international symposium in Nice, France, on March 21-22, 2014. The proceedings of that meeting are presented and contains the abstracts of fourteen oral presentations made at the meeting of prior RCN studies. From 1993 to 2014, 74 RCN studies have been initiated, of which 54 were completed, 10 are in progress or under analysis, and 9 were stopped due to poor accrual. Forty-four peer reviewed publications have been written on behalf of the RCN.Item The Rare Cancer Network: ongoing studies and future strategy(SAGE PUBLICATIONS LTD, 2014-01-01) Ozsahin, Mahmut; Mirimanoff, Rene-Olivier; Thariat, Juliette; Sun, Xu Shan; Atalar, Banu; Lassen-Ramshad, Yasmin; Ugurluer, Gamze; Krishnan, Sunil; Hallemeier, Christopher; Van Houtte, Paul; Krengli, Marco; Zhang, Lan Jun; Chang, Kenneth; Funk, Ryan; Rooney, Jessica; Miller, Robert C.The Rare Cancer Network (RCN) was formed in the early 1990's to create a global network that could pool knowledge and resources in the studies of rare malignancies whose infrequency prevented both their study with prospective clinical trials. To date, the RCN has initiated 74 studies resulting in 46 peer reviewed publications. The First International Symposium of the Rare Cancer Network took place in Nice in March of 2014. Status updates and proposals for new studies were heard for fifteen topics. Ongoing studies continue for cardiac sarcomas, thyroid cancers, glomus tumors, and adult medulloblastomas. New proposals were presented at the symposium for primary hepatic lymphoma, solitary fibrous tumors, Rosai-Dorfman disease, tumors of the ampulla of Vater, salivary gland tumors, anorectal melanoma, midline nuclear protein in testes carcinoma, pulmonary lymphoepithelioma-like carcinoma, adenoid cystic carcinoma of the trachea, osteosarcomas of the mandible, and extra-cranial hemangiopericytoma. This manuscript presents the abstracts of those proposals and updates on ongoing studies, as well a brief summary of the vision and future of the RCN.Item The Mediating Roles of Anxiety, Depression, Sleepiness, Insomnia, and Sleep Quality in the Association between Problematic Social Media Use and Quality of Life among Patients with Cancer(MDPI, 2022-01-01) Imani, Vida; Ahorsu, Daniel Kwasi; Taghizadeh, Nasrin; Parsapour, Zahra; Nejati, Babak; Chen, Hsin-Pao; Pakpour, Amir H.The present study examined the mediating role of anxiety, depression, sleepiness, insomnia, and sleep quality in the association between problematic social media use and quality of life (QoL) among patients with cancer. This cross-sectional survey study recruited 288 patients with cancer to respond to measures on anxiety, depression, sleepiness, insomnia, sleep quality, problematic social media use, and QoL. Structural Equation Modeling was used for the mediation analysis. There were significant relationships between all of the variables used in the study. It was revealed that problematic social media use did not directly influence the QoL of patients with cancer except via anxiety, depression, sleepiness, and insomnia. Sleep quality did not mediate the association between problematic social media use and QoL. Healthcare workers managing cancer should pay attention to the mental health needs of their patients even as they treat their cancer so as to improve their quality of life. Future studies may examine other variables that affect the QoL of patients with cancer as well as other mediating and moderating variables.Item Coronaphobia: A barrier to ongoing cancer treatment?(WILEY, 2022-01-01) Sonmez, Ozlem; Tezcanli, Evrim; Tasci, Elif Senocak; Kazanci, Hande Busra; Altinok, Ayse; Toklucu, Elvan; Tasci, Yusuf; Aydogdu, Cise; Aydin, Aysegul Bakir; Yuce, Sabiha; Oyan, BasakIntroduction Increased stress levels caused by the pandemic might cause delays in cancer treatment. We conducted a survey among cancer patients undergoing treatment to evaluate their psychological wellbeing and treatment adherence during Coronavirus disease 19 (COVID-19) pandemic. Material and Methods Patients receiving active chemotherapy at a private oncology center between January and May 2021 were included. Healthy volunteers were employees of a district health directorate with no history of cancer or chronic disease. Treatment adherence was described as compliant if the prescribed treatment was received within a week and the information was gained from patient charts. Hospital anxiety and depression scale (HADS) and COVID-19 phobia scale (CP19-S) were administered to participants. Results 402 participants were includedItem Epithelial-to-Mesenchymal Transition Is Not a Major Modulating Factor in the Cytotoxic Response to Natural Products in Cancer Cell Lines(MDPI, 2021-01-01) Kucukkaraduman, Baris; Cicek, Ekin Gokce; Akbar, Muhammad Waqas; Canli, Secil Demirkol; Vural, Burcak; Gure, Ali OsmayNumerous natural products exhibit antiproliferative activity against cancer cells by modulating various biological pathways. In this study, we investigated the potential use of eight natural compounds (apigenin, curcumin, epigallocatechin gallate, fisetin, forskolin, procyanidin B2, resveratrol, urolithin A) and two repurposed agents (fulvestrant and metformin) as chemotherapy enhancers and mesenchymal-to-epithelial (MET) inducers of cancer cells. Screening of these compounds in various colon, breast, and pancreatic cancer cell lines revealed anti-cancer activity for all compounds, with curcumin being the most effective among these in all cell lines. Although some of the natural products were able to induce MET in some cancer cell lines, the MET induction was not related to increased synergy with either 5-FU, irinotecan, gemcitabine, or gefitinib. When synergy was observed, for example with curcumin and irinotecan, this was unrelated to MET induction, as assessed by changes in E-cadherin and vimentin expression. Our results show that MET induction is compound and cell line specific, and that MET is not necessarily related to enhanced chemosensitivity.Item Has the COVID-19 Pandemic Affected Breast Cancer Stage and Surgical Volume?(FRONTIERS MEDIA SA, 2022-01-01) Kara, Halil; Arikan, Akif Enes; Dulgeroglu, Onur; Tutar, Burcin; Tokat, Fatma; Uras, CihanBackgroundThis study investigates the effects of COVID-19 on the breast cancer stage and the volume of breast cancer surgery in a specialized breast institute. MethodsData of 332 patients who were diagnosed and treated for breast cancer between December 2019 and November 2020 were evaluated retrospectively according to periods of pandemic. ResultsA significant decrease in the number of operations, especially upfront surgeries rather than surgeries after neoadjuvant chemotherapy, was detected in the early period of the COVID-19 pandemic. It was found that patients with complaints were mostly admitted during this period (p = 0.024). No statistical significance was found for age, sex, side of the tumor, type of tumor, surgery to breast, and axilla. Following the early period of the pandemic, it was observed that patients with mostly luminal, early-stage, and less axillary nodal involvement (p < 0.05) were admitted, and as a result, it was founded that upfront surgeries increased, although no change in TNM staging was observed. However, it did affect the decision of initial treatment. Thus, the number of upfront surgeries was significantly higher than the NCT group (p = 0.027) following the early period. ConclusionSurgical volume is significantly affected in the early period of the COVID-19 pandemic. To overcome overload due to delayed surgeries related to pandemics, some hospitals should be spared for oncological treatments. Following the early period, mostly luminal type, early-stage patients were admitted, probably because of increased self-awareness and short wave duration, but the breast cancer stage was not affected.Item Clinical Outcome and Characteristics of Turkish Breast Cancer Patients who had SARS-Cov-2 Infection(KARE PUBL, 2022-01-01) Isiklar, Aysun; Zengin, Rehile; Balci, Veysel; Sesin Kocagoz, Ayse; Basaran, GulOBJECTIVE COVID-19 pandemic has placed an unprecedented burden on health-care system. Patients with cancer are reported to have a higher risk of infection and a more complicated COVID-19 course. Breast cancer (BC) is the most common cancer in women in Turkey. We report clinical outcomes and characteristics of patients with COVID-19 who were on treatment for BC at our center. METHODS We reviewed medical records of BC patients who had COVID-19 between July 2020 and 2021 at our center. We recorded pathological, clinical, treatment characteristics, and the clinical outcome of COVID-19 infection. RESULTS A total 82 BC patients had COVID-19 between July 2020 and 2021. All patients were female, with a median age of 49 (43-64 years). 85\% of all patients had early and 14.6\% of them had advanced stage BC. COVID-19 had a mild clinical course in 73\%, hospitalization was required in 27\% of patients. Twenty-five patients who required hospitalization were discharged and three patients died due to COVID-19. All of the patients who died from COVID-19 had metastatic BC (p=0.002). Metastatic disease (p=0.002) and chemotherapy within 7 days of COVID-19 diagnosis (p=0.024) have been associated with increased mortality. CONCLUSION Majority of BC patients with COVID-19 have a mild course, patients with risk factors that increase mortality should be followed more carefully.Item Obstructive Sleep Apnea and Cancer(GALENOS PUBL HOUSE, 2016-01-01) Demir, Ceyda Erel KirisogluObstructive sleep apnea (OSA) is a common disorder which is associated with increased morbidity and mortality. There is growing evidence that patients with OSA have higher incidence of cancer, accelerated progression and cancer mortality. Intermittent hypoxia, oxidative stress and sleep fragmentation are hold responsible for cancer development.