Haci Mehmet Turk

Prof. Dr. Haci Mehmet Turk

orcid

Research Focus & Metrics

Academic Career Length

23Years (2004-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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31 July 2023 in Nature Medicine
Verified
Journal Article
Open access
PDF file
MSManish A Shah
Manish A Shah
KSKohei Shitara
Kohei Shitara
Jaffer AjaniJaffer Ajani
Jaffer Ajani
Yung-Jue BangYung-Jue Bang
Yung-Jue Bang
PEPeter Enzinger
Peter Enzinger
RXRui-Hua Xu
Rui-Hua Xu
There is an urgent need for first-line treatment options for patients with human epidermal growth factor receptor 2 (HER2)-negative, locally advanced unresectable or metastatic gastric or gastroesophageal junction (mG/GEJ) adenocarcinoma. Claudin-18 isoform 2 (CLDN18.2) is expressed in normal gastric cells and maintained in malignant G/GEJ adenocarcinoma cells. GLOW (closed enrollment), a global, double-blind, phase 3 study, examined zolbetuximab, a monoclonal antibody that targets CLDN18.2, plus capecitabine and oxaliplatin (CAPOX) as first-line treatment for CLDN18.2-positive, HER2-negative, locally advanced unresectable or mG/GEJ adenocarcinoma. Patients (n = 507) were randomized 1:1 (block sizes of two) to zolbetuximab plus CAPOX or placebo plus CAPOX. GLOW met the primary endpoint of progression-free survival (median, 8.21 months versus 6.80 months with zolbetuximab versus placebo; hazard ratio (HR) = 0.687; 95% confidence interval (CI), 0.544–0.866; P = 0.0007) and key secondary endpoint of overall survival (median, 14.39 months versus 12.16 months; HR = 0.771; 95% CI, 0.615–0.965; P = 0.0118). Grade ≥3 treatment-emergent adverse events were similar with zolbetuximab (72.8%) and placebo (69.9%). Zolbetuximab plus CAPOX represents a potential new first-line therapy for patients with CLDN18.2-positive, HER2-negative, locally advanced unresectable or mG/GEJ adenocarcinoma. ClinicalTrials.gov identifier: NCT03653507.

19 August 2022 in The Breast Journal
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Journal Article
Open access
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MSMelih Simsek
Melih Simsek
AAAliyev Aliyev
Aliyev Aliyev
TBTuba Baydaş
Tuba Baydaş
MBMehmet Besiroglu
Mehmet Besiroglu
TDTarik Demir
Tarik Demir
HTHaci Mehmet Turk
Haci Mehmet Turk
The prognosis of breast cancer patients with brain metastasis is poor. It was aimed to define the clinicopathological features of breast cancer patients with brain metastases and to determine the risk factors and survival outcomes associated with brain metastasis. This is a single-center, retrospective, cross-sectional study. A total number of 127 patients diagnosed with breast cancer and who developed brain metastasis between January 2011 and March 2021 were retrospectively analyzed. The survival and clinicopathological data of these patients according to 4 biological subtypes were evaluated (luminal A, luminal B, HER-2 overexpressing, and triple-negative). The median overall survival for all patients was 45.6 months. The median time from the diagnosis of breast cancer to the occurrence of brain metastasis was 29.7 months, and the median survival time after brain metastasis was 7.2 months. The time from the diagnosis of breast cancer to brain metastasis development was significantly shorter in HER-2 overexpressing and triple-negative subtypes than in luminal A and B subtypes. The median time from breast cancer diagnosis to brain metastasis was 33.5 months in luminal A, 40.6 months in luminal B, 16.8 months in HER-2 overexpressing, and 22.8 months in the triple-negative groups ( ). We found the worst median survival after brain metastasis in the triple-negative group with 3.5 months. Early and close surveillance of high-risk patients may help early diagnosis of brain metastasis and may provide to perform effective treatments leading to longer overall survival times for this patient population.

22 July 2021 in Future Oncology
Verified
Journal Article
Closed access
AYAyse Irem Yasin
Ayse Irem Yasin
ATAtakan Topcu
Atakan Topcu
ASAbdallah Tm Shbair
Abdallah Tm Shbair
ZIZehra Sucuoglu Isleyen
Zehra Sucuoglu Isleyen
AOAhmet Ozturk
Ahmet Ozturk
HTHaci Mehmet Turk
Haci Mehmet Turk
Aim: To assess the anxiety levels of breast cancer patients during the COVID-19 pandemic. Materials & methods: A total of 298 patients completed the State-Trait Anxiety Inventory (STAI-S and STAI-T... Lay abstract COVID-19 pandemic is related to rapidly rising anxiety levels worldwide. Because of the high mortality of COVID-19 in cancer patients, changing treatment routines and disruptions of th...

9 September 2023 in Journal of Clinical Ultrasound
Verified
Journal Article
Closed access
MGMehmet Ali Gultekin
Mehmet Ali Gultekin
APAbdusselim Adil Peker
Abdusselim Adil Peker
AOAyse Betul Oktay
Ayse Betul Oktay
HTHaci Mehmet Turk
Haci Mehmet Turk
DCDilek Hacer Cesme
Dilek Hacer Cesme
AAAlpay Alkan
Alpay Alkan

31 January 2012 in Asian Pacific Journal of Cancer Prevention
Verified
Journal Article
Closed access
HTHaci Mehmet Turk
Haci Mehmet Turk
CCCelalettin Camci
Celalettin Camci
ASAlper Sevinc
Alper Sevinc
SBSuleyman Bukyukberber
Suleyman Bukyukberber
ISIbrahim Sari
Ibrahim Sari
MAMustafa Adli
Mustafa Adli
Cyclooxygenase-2 (COX-2) has been claimed to play role in carcinogenesis and be related to a bad prognosis in tumours. The aim of this study was to investigate the relationship between COX-2 expression and clinical and pathological parameters in early and advanced stage lung cancer patients. A total of 73 patients with lung cancer (27 adenocarcinomas, 33 squamous cell carcinomas, 4 large cell carcinomas and 9 small cell cancer) were analysed retrospectively. COX-2 expression was evaluated by immunohistochemistry in resection materials or lung biopsies. Tumor cells demonstrating more intense staining than smooth muscle and endothelial cells were recorded as COX-2 positive. We investigated the correlation between increased COX-2 expression and histological type of the tumor, the stage of the disease and survival. COX-2 expression was observed in 55% of the adenocarcinomas, 45% of the squamous cell carcinomas and 22% of the small cell carcinomas. No correlation was apparent between COX-2 expression and disease stage, histological type and the survival. The results of this study do not support COX-2 expression as an independent prognostic factor in lung cancer. However, since results of the literature are different, further studies made in larger series are needed.

14 May 2022 in Bosnian Journal of Basic Medical Sciences
Verified
Journal Article
Open access
ATAtakan Topcu
Atakan Topcu
AOAkin Ozturk
Akin Ozturk
IYIsmail Yurtsever
Ismail Yurtsever
MBMehmet Besiroglu
Mehmet Besiroglu
AYAyse Irem Yasin
Ayse Irem Yasin
MSMesut Seker
Mesut Seker
Erlotinib, a tyrosine kinase inhibitor, has been shown to improve the survival of patients with epidermal growth factor receptor (EGFR)-mutated non-small cell lung cancer. Sarcopenia is a status with increasing importance in lung cancer, and it may predict a poor prognosis. We aimed to evaluate the impact of sarcopenia on erlotinib therapy and prognosis in patients with EGFR-mutated (exon 19 or 21 L858R) metastatic lung adenocarcinoma. Sarcopenia was defined as skeletal muscle index ≤39 cm2/m2 for women and ≤55 cm2/m2 for men. The patient characteristics, inflammation parameters, clinical and survival outcomes of the erlotinib therapy were examined according to sarcopenia status. We also analyzed the erlotinib treatment-related toxicity. Seventy-two patients were included in our retrospective study, and the mean age of the patients was 63.7 years. A total of 39 (54.2%) patients were diagnosed with sarcopenia. Patients with sarcopenia had a poor prognosis and had a shorter median progression-free survival (PFS) than patients without sarcopenia (10.5 months vs. 21.8 months, p=0.002). Sarcopenia (HR 2.08) and C-reactive protein > 6.5 mg/L (HR 2.57) were determined as independent poor prognostic factors for PFS of erlotinib therapy. Treatment-related toxicity occurred in 34.7% of patients treated with erlotinib, and sarcopenia did not significantly affect treatment-related toxicity. We also found that sarcopenia significantly affected the response to erlotinib. The expected survival outcomes may be low when erlotinib therapy is used in patients with sarcopenia and metastatic lung adenocarcinoma. This study showed that survival and clinical outcomes could be better predicted by detecting sarcopenia in patients with lung cancer using erlotinib.