Publications by authors named "Kazuki Takada"

Article Synopsis
  • - The study examined the role of programmed cell death-ligand 1 (PD-L1) expression and epidermal growth factor receptor (EGFR) mutations as biomarkers for lung adenocarcinoma, analyzing data from 847 patients across 21 centers in Japan from 2015 to 2018.
  • - Results showed that while PD-L1 expression was linked to shorter recurrence-free survival (RFS) in both EGFR-mutant and wild-type patients, it had no effect on overall survival (OS) in EGFR-mutant patients.
  • - The findings suggest that PD-L1 expression is a poor predictor of OS for EGFR-mutant patients and does not influence the effectiveness of post-relapse treatment with EGFR-
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The potential impact of concomitant medications such as systemic antibiotics, proton pump inhibitors (PPIs), and probiotics in patients with extensive-stage small cell lung cancer (ES-SCLC) receiving first-line chemo-immunotherapy combinations remains unclear. We ran a post hoc analysis of the IMpower133 phase I/III trial, which randomized patients with ES-SCLC to receive carboplatin/etoposide with either atezolizumab or placebo for 4 cycles, followed by maintenance therapy. We included any systemic antibiotic/probiotic exposure within 42 days prior to treatment initiation and any PPIs treatment within 30 days prior to treatment initiation.

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  • - The study investigates the role of CD155 expression in lung squamous cell carcinoma (LUSC) and its potential as a target for cancer immunotherapy, revealing its importance in tumor progression and immune evasion.
  • - Out of 264 patients analyzed, over half showed high CD155 expression, which correlated with worse outcomes and specific clinical features, such as pleural and vascular invasion.
  • - High CD155 expression was found to be an independent negative prognostic factor, particularly affecting overall survival in patients with PD-L1-positive tumors, while not impacting disease-free survival.
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Compared to other malignancies, few studies have investigated the role of family history of cancer (FHC) in patients with lung cancer, yielding largely heterogeneous results. We performed a systematic literature review in accordance with PRISMA guidelines, searching the PubMed and Scopus databases from their inception to November 25, 2023, to identify studies reporting on the role of FHC in patients with lung cancer. A total of 53 articles were included, most with a retrospective design and encompassing a variety of geographical areas and ethnicities.

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Background: Most Japanese medical schools likely continue to rely on peer physical examination (PPE) as a tool to for teaching physical examination skills to students. However, the attitudes of medical students in Japan toward PPEs have not be identified. Therefore, we evaluated students' attitudes toward PPE in a Japanese medical school as a preparation for developing a PPE policy tailored to the context of Japanese culture.

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Background: Cluster of differentiation (CD) 155 is a transmembrane protein that belongs to the nectin-like molecule family, which is widely overexpressed in several types of cancer. However, the clinical significance of CD155 in pathologic stage I lung adenocarcinoma remains poorly understood.

Methods: We analyzed 320 patients diagnosed with pathologic stage I lung adenocarcinoma who underwent surgical treatment at Kyushu University Hospital between 2006 and 2015.

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  • - The study analyzed the effects of central nervous system (CNS) metastasis on performance status, treatment responses, and survival rates in lung adenocarcinoma patients with common EGFR mutations following surgical resection.
  • - Out of 4181 patients, 78 experienced CNS metastasis, which was more common in those receiving conventional adjuvant chemotherapy; however, this treatment showed no significant benefits in relapse-free survival or overall survival post-relapse.
  • - The findings suggest that CNS metastasis doesn't noticeably impact performance status or alter treatment efficacy with EGFR-tyrosine kinase inhibitors, indicating a need for more studies on managing CNS metastasis in the context of adjuvant TKI therapies.
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Background: Numerous meta-analyses have examined immunotherapy-induced adverse events (AEs) in non-small cell lung cancer (NSCLC). However, there is limited research comparing AEs from combination chemoimmunotherapy versus chemotherapy alone in the first-line NSCLC treatment, particularly regarding specific toxic symptoms and hematological toxicities associated with the addition of immune checkpoint inhibitors (ICIs).

Methods: We conducted a meta-analysis of randomized clinical trials (RCTs) comparing ICIs + non-ICIs versus non-ICIs alone as first-line therapy in NSCLC, sourced from PubMed and Scopus databases.

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Introduction: Osimertinib is an irreversible EGFR tyrosine kinase inhibitor approved for the first-line treatment of patients with metastatic NSCLC harboring EGFR exon 19 deletions or L858R mutations. Patients treated with osimertinib invariably develop acquired resistance by mechanisms involving additional EGFR mutations, MET amplification, and other pathways. There is no known involvement of the oncogenic MUC1-C protein in acquired osimertinib resistance.

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Several clinical trials are currently underway to evaluate immune checkpoint inhibitors (ICIs) as neoadjuvant treatment for patients with early-stage non-small-cell lung cancer (NSCLC), and their use in clinical practice is expected to increase in the future. Therefore, a proper assessment of surgical outcomes and perioperative complications after neoadjuvant ICIs is essential to establish recommendations and guidelines. We performed a systematic literature review in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines (PRISMA), searching the PubMed and Scopus databases from the January 1, 2017, to the July 27, 2023, to identify potentially relevant published trials of neoadjuvant ICIs in patients with reseactable NSCLC with available information on surgical outcomes and perioperative complications.

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Background: Granzyme B (GZMB) is a serine protease produced by cytotoxic lymphocytes that reflects the activity of anti-tumor immune responses in tumor-infiltrating lymphocytes (TILs); however, the prognostic significance of GZMB+ TILs in lung adenocarcinoma is poorly understood.

Methods: We analyzed 273 patients with pathological stage (pStage) I-IIIA lung adenocarcinoma who underwent surgery at Kyushu University from 2003 to 2012. We evaluated GZMB+ TIL counts by immunohistochemistry.

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Background: Immunotherapy has become a standard-of-care for patients with non-small-cell lung cancer (NSCLC). Although several biomarkers, such as programmed cell death-1, have been shown to be useful in selecting patients likely to benefit from immune checkpoint inhibitors (ICIs), more useful and reliable ones should be investigated. The prognostic nutritional index (PNI) is a marker of the immune and nutritional status of the host, and is derived from serum albumin level and peripheral lymphocyte count.

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Purpose: The incidence of delayed chemotherapy-induced nausea and vomiting (CINV) in patients with non-small cell lung cancer (NSCLC) receiving carboplatin (CBDCA)-based chemotherapy (CBDCA + pemetrexed or paclitaxel) has not been clearly described. Therefore, we attempted to evaluate whether delayed CINV could be controlled using a combination of three antiemetics and identify individual risk factors.

Methods: We pooled data from two prospective observational studies, namely a nationwide survey of CINV and a prospective, observational study in Japan, to assess whether delayed CINV could be controlled using a combination of three antiemetics and identified individual risk factors via inverse probability treatment-weighted analysis.

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Introduction: Recently, several meta-analyses have investigated the association between sex and the efficacy of immune checkpoint inhibitors (ICIs) in non-small-cell lung cancer (NSCLC). However, this issue remains controversial, because the results have been inconsistent. Moreover, the effect of sex on outcomes in patients with NSCLC receiving combination chemoimmunotherapy as a first-line therapy is poorly understood.

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Background: Consolidation tumor ratio (CTR) is associated with cancer progression and histological invasiveness in lung adenocarcinoma (LAD). However, little is known about the association between CTR and immune-related factors, including tumor-infiltrating lymphocytes (TILs) density or tumor expression of programmed death ligand 1 (PD-L1) and indoleamine 2,3-dioxygenase 1 (IDO1) in small-sized LAD.

Methods: This study included 258 patients with LAD (<3 cm) who underwent surgery.

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Background: We previously validated in European patients with NSCLC treated with programmed death-1 (PD-1) checkpoint inhibitors the cumulative detrimental effect of concomitant medications.

Materials And Methods: We evaluated the prognostic ability of a "drug score" computed on the basis of baseline corticosteroids, proton pump inhibitors, and antibiotics, in an independent cohort of Japanese patients with advanced NSCLC treated with PD-1 monotherapy. Subsequently, we assessed the impact of baseline probiotics on the score's diagnostic ability and their interaction with antibiotics in influencing survival.

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Article Synopsis
  • Recent studies suggest that medications taken alongside cancer treatments can influence patient outcomes in non-small-cell lung cancer (NSCLC), but the specific effects of statin therapy remain unclear.
  • A study analyzed 390 NSCLC patients on PD-1 immunotherapy, finding that those on statins had longer overall survival compared to non-statin users, although no strong independent positive effect was established.
  • The researchers propose that statins could potentially enhance immunotherapy effectiveness in NSCLC patients, but further research with larger groups is necessary to confirm these results.
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  • A study found that using proton pump inhibitors (PPIs) in patients with advanced non-small-cell lung cancer (NSCLC) undergoing immune checkpoint inhibitors (ICIs) led to worse clinical outcomes, but the effects on patients with postoperative recurrence were not previously known.
  • Researchers analyzed outcomes from 95 patients across three medical centers in Japan and determined that those who did not use PPIs had significantly longer progression-free survival (PFS) compared to those who did.
  • The study concluded that PPI use was an independent negative factor affecting PFS and overall survival (OS), suggesting that PPIs should be prescribed cautiously to postoperative NSCLC patients on ICIs, with the need for further verification through prospective studies.
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Background: The number of reports of multiple primary cancer (MPC) is increasing because of the advancement in diagnostic imaging technology. However, the treatment strategy for MPCs involving pancreatic cancer is controversial because of the extremely poor prognosis. We herein report a patient with synchronous triple cancer involving the pancreas, esophagus, and lung who underwent conversion surgery after intensive chemotherapy for unresectable locally advanced pancreatic cancer.

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