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Background: The molecular testing of KRAS mutation status in metastatic colorectal cancer patients is mandatory to identify patients eligible for anti-epidermal growth factor receptor monoclonal antibody therapy.
Aim: To report the frequency of KRAS gene mutations in Chilean patients with colorectal cancer (CRC).
Material And Methods: A cohort of 262 Chilean patients with CRC aged 26 to 90 years (53% males), was studied. KRAS mutation status was analyzed by real-time polymerase chain reaction and correlated with clinicopathological data.
Results: Ninety-eight patients (37%) were positive for KRAS mutations. G12D was the most common mutation with a frequency of 36.7%, followed by G12V (25.5%), G13D (17.3%), G12A (7.1%), G12C (6.1%), G12S (5.1%) and G12R (2%). The frequency of the mutation in left, right colon and rectal tumors was 37.8, 32.6 and 44.9%, respectively. Among tumors with mutations, 86.7% were well or moderately differentiated tumors and the rest were poorly differentiated. No significant associations between KRAS gene mutations and other clinicopathological features of the tumor were observed.
Conclusions: The frequencies of KRAS mutations reported in this study are similar to frequencies reported for European and North-American populations, lower than in a Spanish study and higher than in a Peruvian study.
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http://dx.doi.org/10.4067/S0034-98872014001100007 | DOI Listing |
Anal Bioanal Chem
December 2024
Departamento de Análisis Instrumental, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile.
Coronavirus disease 2019 is a highly contagious respiratory illness caused by the coronavirus SARS-CoV-2. Symptoms can range from mild to severe and typically appear 2-14 days after virus exposure. While vaccination has significantly reduced the incidence of severe complications, strategies for the identification of new biomarkers to assess disease severity remains a critical area of research.
View Article and Find Full Text PDFBiol Res
December 2024
Unidad de Innovación en Prevención y Oncología de Precisión Centro Oncológico, Facultad de Medicina, Unidad de Innovación en Prevención y Oncología de Precisión Universidad Católica del Maule, Talca, 3480094, Chile.
Background: Breast cancer is a leading cause of cancer-related mortality worldwide, with hereditary forms accounting for approximately 10% of cases. In Chile, significant gaps exist in genetic counseling and testing, particularly within the public health system. This study presents the implementation and outcomes of the first regional hereditary cancer program in the Maule region of Chile, aimed at improving detection and management of hereditary breast cancer.
View Article and Find Full Text PDFBiol Res
December 2024
Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Alameda 340, 8331150, Santiago, Chile.
Introduction: Chile has achieved developed nation status and boasts a life expectancy of 81 + years; however, the healthcare and research systems are unprepared for the social and economic burden of cancer. One decade ago, the authors put forward a comprehensive analysis of cancer infrastructure, together with a series of suggestions on research orientated political policy.
Objectives: Provide an update and comment on policy, infrastructure, gender equality, stakeholder participation and new challenges in national oncology.
Parasit Vectors
December 2024
Laboratorio Clínico, Facultad de Medicina Clínica Alemana, Clínica Alemana de Santiago, Universidad del Desarrollo, Santiago, Chile.
Candidatus Orientia chiloensis causes scrub typhus over a wide geographical range in southern Chile. The life cycle, including vectors and reservoirs of this novel rickettsial pathogen, is incompletely understood. We analyzed rodent tissue and rodent-associated mite samples collected during a field study in six localities on Chiloé Island, where human scrub typhus cases have occurred.
View Article and Find Full Text PDFJ Craniofac Surg
December 2024
Department of Speech, Language and Hearing Disorders, Bauru School of Dentistry, University of Sao Paulo.
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