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"Molecular pathology of lung cancer bridges the gap between the molecular specialist and the clinical practitioner, including the surgical pathologist who now has a key role in decisions regarding molecular targeted therapy for lung cancer. Molecular pathology of lung cancer provides the latest information and current insights into the molecular basis for lung cancer, including precursor and preinvasive lesions, molecular diagnosis, molecular targeted therapy, molecular prognosis, molecular radiology and related fields for lung cancer generally and for the specific cell types. As many fundamental concepts about lung cancer have undergone revision in only the past few years, this book will likely be the first to comprehensively cover the new molecular pathology of lung cancer. It provides a foundation in this field for pathologists, medical oncologists, radiation oncologists, thoracic surgeons, thoracic radiologists and their trainees, physician assistants, and nursing staff."

"This book provides a state-of-the-art approach to the molecular basis of hematologic diseases and its translation into improved diagnostics and novel therapeutic strategies. Several representative hemato-oncologic malignancies are analyzed in detail: acute lymphoblastic leukemia, acute myeloid leukemia, B-cell Non-Hodgkin lymphomas, multiple myeloma, chronic lymphocytic leukemia, chronic myeloid leukemia, myelodysplastic syndromes, and myeloproliferative neoplasms. Experts in the field describe the molecular methods applied for modern diagnostics and therapies, such as hematopoietic stem cell transplantation, donor recipient matching, banking of biological material, analyses of post-transplant chimerism, and minimal residual disease monitoring. The volume concludes with an extensive section comprising thorough step-by-step protocols of molecular techniques in hematology, all of them validated in the authors? own laboratories."

"PendahuluanMicroRNA (miR)-544a telah diidentifikasi sebagai pengatur potensial dalam jalur WNT/β-Catenin, namun perannya yang spesifik pada kanker paru-paru non-sel kecil (KPKBSK) dan hubungannya dengan resistensi kemoterapi berbasis platinum masih belum jelas. Oleh karena itu, kami bertujuan untuk menentukan hubungan antara ekspresi miR-544a dan GSK-3β, β-catenin, dan CD44 dengan resistensi kemoterapi berbasis platinum pada pasien KPKBSK stadium lanjut.MetodePenelitian ini dirancang sebagai studi kasus kontrol di mana individu yang didiagnosis dengan KPKBSK stadium lanjut (III-IV) dari Januari 2018 hingga Juli 2023 dari 6 rumah sakit berbeda di Indonesia. Analisis tingkat miR-544a dilakukan menggunakan Kit PCR QuantiTect SYBR Green secara real-time. Ekspresi GSK, β-catenin, dan CD44 menggunakan pewarnaan imunohistokimia (IHK) dilakukan dari formalin-fixed paraffin embedded (FFPE). Evaluasi intensitas IHK dibagi menjadi empat kategori ekspresi: negatif atau tidak berwarna, positif lemah, positif sedang, dan positif kuat. Dari 500 sel, kami menggunakan rumus semi-kuantitatif H-score.HasilStudi ini melibatkan 62 pasien KPKBSK stadium lanjut yang menjalani kemoterapi berbasis platinum dan menemukan miR-544a lebih tinggi pada responden yang buruk, dengan nilai p yang signifikan sebesar 0,009. Model prediktif untuk miR-544a menunjukkan nilai Roctab sebesar 0,6957. Nilai batas miR-544a sebesar 2,08 menghasilkan sensitivitas 64% dan spesifisitas 67,57%. Tingkat miR-544a di atas 2,08 secara signifikan terkait dengan respons pengobatan yang lebih buruk (OR 2,159, 95% CI 1,132 - 4,117, p = 0,016).KesimpulanStudi ini menunjukkan bahwa tingkat miR-544a merupakan biomarker yang signifikan untuk memprediksi respons kemoterapi pada pasien dengan KPKBSK stadium lanjut.

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Introduction

MicroRNAs (miR)-544a has been identified as a potential regulator in the Wnt/β-Catenin pathway, but its specific role in non-small cell lung cancer (NSCLC) and its relationship with platinum-based chemotherapy resistance, remains unclear. Thus, we aim to determine the relationship between the expression of miR-544a and GSK-3β, β-catenin, and CD44 with platinum-based chemotherapy resistance in advanced stage NSCLC patients.

Methods

The research is designed as a case control study in which individuals diagnosed with advanced stage (III-IV) NSCLC from January 2018 and July 2023 from 6 different hospitals in Indonesia.

The analysis of miR-544a levels was done using the real-time QuantiTect SYBR Green PCR Master Kit. The expression of GSK, β-catenin, and CD44 expression using immunohistochemistry (IHC) staining was performed from the formalin-fixed paraffin embedded (FFPE). The evaluation of IHC intensity was divided into four expression categories: negative or unstained, weakly positive, moderately positive, and strongly positive. From 500 cells, we used the semi-quantitative H-score formula.

Results

This study of 62 advance NSCLC patients undergoing platinum-based chemotherapy and found miR-544a were higher in poor responders, with a significant p-value of 0.009. The predictive model for MiR-544a demonstrated a Roctab value of 0.6957. A miR-544a cutoff value of 2.08 yielded sensitivity of 64% and specificity of 67.57%. MiR-544a levels above 2.08 were significantly associated with poorer treatment response (OR 2.159, 95% CI 1.132 - 4.117, p = 0.016).

Conclusions

The study demonstrates that miR-544a levels are a significant biomarker for predicting chemotherapy response in patients with advance NSCLC."