Publications by authors named "Sirachainan E"

Article Synopsis
  • DPYD polymorphisms are linked to toxicities from the chemotherapy drug 5-FU, and this study focused on identifying associations between specific DPYD gene variations and blood-related side effects in Thai colorectal cancer patients.
  • Genetic testing revealed distinct frequencies of DPYD variants, with the homozygous variant DPYD*9A significantly correlating with neutropenia and other hematological toxicities during the first cycle of treatment.
  • The findings suggest that the DPYD*5 variant may act as a predictive marker for lower toxicity levels, highlighting the importance of genetic profiling in managing 5-FU treatment risks.
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Article Synopsis
  • * Recent advancements in targeted therapy and immune-checkpoint inhibitors are now becoming available for treating unresectable HCC and preventing recurrence after curative procedures.
  • * This clinical practice guideline aims to provide updated recommendations from Asia-Pacific experts on systemic therapy for HCC, addressing key questions about patient selection, effective treatments, and management strategies for immunotherapy.
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Background: Epstein-Barr virus-specific cytotoxic T lymphocyte (EBV-CTL) is an autologous adoptive T-cell immunotherapy generated from the blood of individuals and manufactured without genetic modification. In a previous phase II trial of locally recurrent or metastatic nasopharyngeal carcinoma (R/M NPC) patients, first-line gemcitabine and carboplatin (GC) and EBV-CTL combination demonstrated objective antitumor EBV-CTL activity and a favorable safety profile. The present study explored whether this combined first-line chemo-immunotherapy strategy would produce superior clinical efficacy and better quality of life compared with conventional chemotherapy treatment.

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The European Society for Medical Oncology (ESMO) Clinical Practice Guidelines for the diagnosis, treatment and follow-up of patients with gastric cancer (GC), published in late 2022 and the updated ESMO Gastric Cancer Living Guideline published in July 2023, were adapted in August 2023, according to previously established standard methodology, to produce the Pan-Asian adapted (PAGA) ESMO consensus guidelines for the management of Asian patients with GC. The adapted guidelines presented in this manuscript represent the consensus opinions reached by a panel of Asian experts in the treatment of patients with GC representing the oncological societies of China (CSCO), Indonesia (ISHMO), India (ISMPO), Japan (JSMO), Korea (KSMO), Malaysia (MOS), the Philippines (PSMO), Singapore (SSO), Taiwan (TOS) and Thailand (TSCO), coordinated by ESMO and the Japanese Society of Medical Oncology (JSMO). The voting was based on scientific evidence and was independent of the current treatment practices, drug access restrictions and reimbursement decisions in the different Asian regions represented by the 10 oncological societies.

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Background: EGFR inhibitor and immunotherapy have been approved for adjuvant treatment in resectable non-small cell lung cancer (NSCLC). Limited reports of molecular and clinical characteristics as prognostic factors in NSCLC have been published.

Methods: Medical records of patients with resectable NSCLC stage I-III diagnosed during 2015-2020 were reviewed.

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This report summarizes the presentations and discussions in the first Asian Clinical Trials Network for Cancers (ATLAS) international symposium that was held on 24 April 2022, in Bangkok, Thailand, and hosted by the National Cancer Center Hospital (NCCH), co-hosted by the Pharmaceuticals and Medical Devices Agency (PMDA), Clinical Research Malaysia (CRM) and the Thai Society of Clinical Oncology (TSCO), and supported by Embassy of Japan in Thailand. Since 2020, the NCCH has conducted the ATLAS project to enhance research environments and infrastructures to facilitate international clinical research and cancer genomic medicine in the Asian region. The purpose of the symposium was to discuss what we can achieve under the ATLAS project, to share the latest topics and common issues in cancer research and to facilitate mutual understanding.

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Background: Despite significant benefits of epidermal growth factor receptor-tyrosine kinase inhibitor (EGFR-TKI) treatment in patients with -mutated NSCLC, access remains limited in Thailand and elsewhere.

Methods: Retrospective analysis of patients with locally advanced/recurrent NSCLC and known mutation (m) status treated at Ramathibodi Hospital (2012-2017). Prognostic factors for overall survival (OS), including treatment type and healthcare coverage, were analyzed using Cox regression.

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Background: In Thailand, data on colorectal cancer (CRC) patient characteristics and overall survival (OS) rates are limited. We aimed to describe the overall 5-year, 10-year survival and to examine factors effecting the survival outcome among patients who were diagnoses of colorectal cancer.

Methods: We reviewed medical records of patients diagnosed with invasive CRC from 2007 through 2016.

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Background: Information on genetic alterations, notably EGFR mutations, is important for guiding non-small-cell lung cancer (NSCLC) treatment. Circulating tumor DNA (ctDNA) analysis represents a less invasive alternative to tissue biopsy for analyzing mutation status, but its clinical value may vary across disease stages.

Objective: To explore clinical correlates of ctDNA and tissue/plasma-based EGFR mutation (EGFRm) status across all NSCLC stages.

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Purpose: Atezolizumab plus bevacizumab treatment is a first-line therapy for unresectable hepatocellular carcinoma (HCC) worldwide. The efficacy, safety, and patient-reported outcomes (PROs) of HCC in Thailand have not yet been reported. This study aimed to evaluate the efficacy, safety, and PROs of atezolizumab plus bevacizumab.

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Article Synopsis
  • This study compares the clinical effectiveness of a chemotherapy treatment (FOLFOX) to a multikinase inhibitor (Sorafenib) for advanced hepatocellular carcinoma (aHCC) in real-life scenarios, especially in resource-limited settings.
  • An analysis of 504 patients from Thai hospitals found that Sorafenib provided a median overall survival of 11.38 months, while FOLFOX resulted in 8.22 months, indicating that FOLFOX had significantly shorter overall survival and progression-free survival.
  • Despite the shorter survival rates, FOLFOX still offers a potential treatment option for aHCC, extending overall survival and providing alternative therapy for patients in developing countries.
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Background: The two common methylenetetrahydrofolate reductase () polymorphisms 677G>A and 1298A>C may have been affecting 5-FU toxicity in cancer patients for decades. Drug efficacy has also been shown by previous studies to be affected. In this study, we investigated the effects of these polymorphisms on 5-FU hematological toxicity and treatment efficacy, to provide enhanced pharmacological treatment for cancer patients.

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Background: Current guidelines recommend anti-epidermal growth factor receptor monoclonal antibodies (anti-EGFR Ab) as first-line treatment only in patients with left-sided wild type ) metastatic colorectal cancer (mCRC). However, there are no guideline recommendations specific to tumor sidedness in subsequent-line treatment. This study aimed to investigate the effect of primary tumor location on second- or later-line treatment outcomes in patients with mCRC.

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Malignant ascites is an abnormal accumulation of fluid within the peritoneal cavity, caused by metastasis of several types of cancers, including colorectal cancer (CRC). Cancer cells in ascites reflect poor prognosis and serve as a good specimen to study tumour heterogeneity, as they represent a collection of multiple metastatic sites in the peritoneum. In the present study, we have employed single-cell RNA-sequencing (scRNA-seq) to explore and characterise ascites-derived cells from a CRC patient.

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Aims: Clinical decision making is challenging in men with metastatic prostate cancer (mPC), as heterogeneity in treatment options and patient characteristics have resulted in multiple scenarios with little or no evidence. The South East Asia Expert Panel 2019 addressed some of these challenges.

Methods: Based on evidence in the literature and expert interviews, 19 statements were formulated for key challenges in the treatment of men with castration-sensitive and -resistant prostate cancer in clinical practice.

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Genetic polymorphisms in drug metabolizing enzymes and drug transporters may affect irinotecan toxicity. Although genetic polymorphisms have been shown to influence the irinotecan toxicity, data are limited in Thai population. Thus, the aim of this study was to assess the allele and genotype frequencies and the relationship between CYP3A4/5, DPYD, UGT1A1, ABCB1, and ABCC2 genetic variations and irinotecan-induced toxicity in Thai colorectal cancer patients.

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Objective: BIM is a modulator of apoptosis that is triggered by EGFR-TKIs. This study evaluated the role of BIM deletion and its expression as predictor of EGFR-TKI treatment outcome.

Methods: The medical record of 185 EGFR-positive advanced non-small cell lung cancer (NSCLC) patients with/ without EGFR-TKI treatment between 9/2012 and 12/2014 were retrospectively reviewed.

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Background: No predictive biomarker of immune checkpoint inhibitors in head and neck squamous cell carcinoma (HNSCC) has been well established. The impact of programmed death-ligand 1 (PD-L1) expression, CD8+ tumor-infiltrating lymphocytes (TILs), and p16 status in HNSCC is unclear and may vary according to ethnicity.

Methods: HNSCC patients treated between 2007 and 2013 were reviewed.

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Objectives: Immunotherapies that target the programmed death-1/ programmed death-1 ligand (PD-1/PD-L1) immune checkpoint pathway have shown promise in nasopharyngeal carcinoma (NPC) in early phases clinical studies. Here, we evaluated PD-1 and PD-L1 expression and CD8+ tumor-infiltrating lymphocytes (TILs) in NPC patients.

Materials And Methods: Newly diagnosed NPC patients were identified through the institutional database between January 2007 and December 2012.

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This study explores genomic alterations in cholangiocarcinoma (CCC) tissues in Thai patients. We identified and reviewed the records of patients who had been diagnosed with CCC and for whom sufficient tumor samples for DNA and RNA extraction were available in our database. The specimens were explored for , , , and mutations and translocation in 81 samples.

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Background: Irinotecan (CPT-11) is chemotherapy used mainly in the metastatic colorectal cancer. The purpose of this study was to develop and validate the LC-MS/MS for the simultaneous determination of CPT-11, SN-38, and SN-38G.

Methods: A 100 μL of plasma was prepared after protein precipitation and analyzed on a C18 column using 0.

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Article Synopsis
  • The APEC study explored the effectiveness of administering cetuximab every two weeks alongside chemotherapy in patients with KRAS wild-type metastatic colorectal cancer (mCRC), aiming to improve treatment outcomes.
  • Results showed a best overall response rate (BORR) of 58.8%, with median progression-free survival (PFS) of 11.1 months and overall survival (OS) of 26.8 months, indicating promising efficacy, especially in patients with RAS wild-type mutations.
  • The study concluded that bi-weekly cetuximab has a similar safety profile to the weekly regimen, suggesting it could be a viable alternative for first-line treatment in mCRC patients.
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Background: Preoperative combined chemoradiation treatment (CRT) is now accepted as the treatment of choice due to its benefits of decreasing the primary tumor volume and enhancing the sphincter preservation surgery. Determining whether a patient is responding to therapy is crucial for rectal cancer patients who may benefit from prompt treatment modifications.

Objective: To evaluate the use of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in predicting the treatment response.

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Background: Genetic polymorphisms of drug-metabolizing enzymes and transporters have been extensively studied with regard to tamoxifen treatment outcomes. However, the results are inconclusive. Analysis of organ-specific metastasis may reveal the association of these pharmacogenetic factors.

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UDP-glucuronosyltransferase1A1 (UGT1A1) polymorphisms have been related with irinotecan toxicity. The purpose of this study was to determine the associations between UGT1A1(*)28 and (*)6 polymorphisms and irinotecan toxicity in Thai patients with metastatic colorectal cancer. 44 metastatic colorectal cancer patients received irinotecan-based chemotherapy.

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