Purpose: OBP-301 (Telomelysin) is an attenuated type-5 adenovirus that contains the human telomerase reverse transcriptase promoter to regulate viral replication. OBP-301 sensitises human cancer cells to ionising radiation by inhibiting DNA repair, and radiation enhances coxsackievirus and adenovirus receptor-mediated OBP-301 infection on the contrary. We assessed OBP-301 with radiotherapy in oesophageal cancer patients unfit for standard chemoradiation treatments.
Methods: A phase I dose-escalation study of OBP-301 with radiotherapy was conducted in 13 histologically confirmed oesophageal cancer patients deemed unfit to undergo surgery or chemotherapy. Study treatment consisted of OBP-301 administration by intratumoural needle injection using a flexible endoscope on days 1, 18 and 32. Radiotherapy was administered concurrently over 6 weeks, beginning on day 4, to a total of 60 Gy.
Results: Of the 13 patients, 7, 3 and 3 patients were treated with 10, 10 and 10 virus particles, respectively. Study group comprised 10 males and 3 females, with a median age of 82 years (range, 53-91 years). All patients developed a transient, self-limited lymphopenia. Distribution studies revealed transient virus shedding in the plasma. Eight patients had local complete response (CR); all of them exhibited no pathologically viable malignant cells in biopsy specimens, and 3 patients had a partial response. The objective response rate was 91.7%. The clinical CR rate was 83.3% in stage I and 60.0% in stage II/III. Histopathological examination revealed massive infiltration of CD8 cells and increased PD-L1 expression.
Conclusion: Multiple courses of endoscopic intratumoural OBP-301 injection with radiotherapy are feasible and provide clinical benefits in patients with oesophageal cancer unfit for standard treatments.
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http://dx.doi.org/10.1016/j.ejca.2021.04.043 | DOI Listing |
Cancer Cell Int
December 2024
Department of Applied Chemistry, Graduate Institute of Biomedicine and Biomedical Technology, National Chi Nan University, Puli, Taiwan.
Introduction: Chronic alcohol consumption and tobacco usage are major risk factors for esophageal squamous cell carcinoma (ESCC). Excessive tobacco and alcohol consumption lead to oxidative stress and the generation of reactive carbonyl species (RCS) which induce DNA damage and cell apoptosis. This phenomenon contributes to cell damage and carcinogenesis in various organs including ESCC.
View Article and Find Full Text PDFJ Chest Surg
December 2024
Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
According to 2021 statistics, esophageal cancer ranked as the 18th most common cancer and the 10th leading cause of cancer-related deaths in Korea, predominantly manifesting as squamous cell carcinoma. The incidence of esophageal cancer in Korea has been on a gradual decline, while the proportion of early-stage diagnoses has increased, leading to an improvement in the 5-year relative survival rate. The Health Insurance Review & Assessment Service, reports that around 800 esophagectomy procedures are performed each year.
View Article and Find Full Text PDFJ Thorac Cardiovasc Surg
December 2024
Department of Thoracic Surgery, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China (Sichuan Cancer Hospital), Chengdu, China. Electronic address:
Background: Esophageal squamous cell carcinoma (ESCC) is a prevalent and aggressive gastrointestinal tumor, particularly in East Asia. However, there is a lack of consensus on the long-term survival outcomes of intrathoracic anastomosis and cervical anastomosis following esophagectomy. This study aims to provide a comprehensive summary of the long-term survival outcomes of these two anastomosis techniques.
View Article and Find Full Text PDFJ Hematol Oncol
December 2024
Department of Gastroenterology, Changhai Hospital, Naval Medical University, Shanghai, China.
Cancer Epidemiol
December 2024
College of Public Health, Zhengzhou University, Zhengzhou, Henan Province 450001, China; Henan Key Laboratory of Tumor Epidemiology and State Key Laboratory of Esophageal Cancer Prevention & Treatment, Zhengzhou University, Zhengzhou, Henan Province 450052, China. Electronic address:
Background: High fasting plasma glucose (HFPG) has been indicated as one of the important risk factors for cancers. This study aimed to estimate the disease burden of cancers attributable to HFPG in China from 1990 to 2021 and predict the burden until 2031.
Methods: The data of cancers attributable to HFPG were extracted from Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2021 project.
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