Publications by authors named "Kadoaki Ohashi"

Pulmonary sclerosing pneumocytoma (PSP) is a rare form of lung cancer that occasionally presents with lymph node and extrapulmonary metastases, and multiple lesions. The treatment of metastatic PSP remains undefined. This study reports the case of a 48-year-old female patient diagnosed with PSP following surgical intervention for a solitary nodule in the left lower lobe.

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Objectives: There is limited consensus on resectability criteria for Stage IIIA-N2 non-small cell lung cancer (NSCLC). We examined the patient characteristics, N2 status, treatment decisions, and clinical outcomes according to the treatment modality for Stage IIIA-N2 NSCLC in Japan.

Materials And Methods: Patients with Stage IIIA-N2 NSCLC in Japan were consecutively registered in the SOLUTION study between 2013 and 2014.

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What Is This Summary About?: This is a summary of a phase 2 clinical study called DeLLphi-301. The study looked at how effective and safe a medicine called tarlatamab was in participants with small cell lung cancer (SCLC). Participants previously received at least two other treatments for their SCLC.

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A 56-year-old woman who received CD19 chimeric antigen receptor-T cell therapy for refractory diffuse large B-cell lymphoma developed severe coronavirus disease 2019 (COVID-19) and was treated with nirmatrelvir/ritonavir in April 2022. However, she experienced persistent fatigue and cough and fever in June. Computed tomography revealed bilateral ground-glass opacities (GGO), and the patient was treated with corticosteroids for organizing pneumonia after COVID-19.

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A 55-year-old man presented to our hospital with idiopathic pulmonary fibrosis (IPF). He was registered with the Japan Organ Transplant Network the following year due to disease progression. Treatment with clarithromycin, ethambutol, and rifampicin for complications of Mycobacterium avium pulmonary disease was initiated, but sputum conversion could not be achieved.

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Background: MET exon 14 skipping mutations occur in 3-4% and MET high amplifications occur in < 1% of patients with non-small-cell lung cancer (NSCLC). Crizotinib, a selective ATP-competitive small-molecule inhibitor of c-Met, ALK, and ROS1 tyrosine kinases, has shown activity in cancer models with various types of MET activation.

Methods: The Co-MET study is a single-arm phase 2 trial to assess the safety and efficacy of crizotinib in MET inhibitor-naïve patients with advanced NSCLC harboring MET exon 14 skipping mutation (cohort 1) or high MET gene copy number of ≥ 7 (cohort 2).

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The concurrent incidence of lung cancer and tuberculosis is expected to escalate due to the projected growth in the older population. Combination therapy with osimertinib and antituberculosis drugs has not been well-established. We report a case of successful treatment involving the concomitant administration of osimertinib and antituberculosis drugs in an older patient, an 89-year-old female, diagnosed with epidermal growth factor receptor (EGFR)-mutant lung cancer and pulmonary tuberculosis.

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Objectives: In this study, we explored the clinical outcomes of non-small cell lung cancer (NSCLC) patients with EGFR Exon20 in-frame insertions (Exon20ins), and the impact of the location of Exon20ins on these clinical outcomes.

Materials And Methods: The efficacies of current systemic therapies in NSCLC patients harboring Exon20ins were investigated using a large-scale clinico-genomic database of LC-SCRUM-Asia, and compared with that of amivantamab in the CHRYSALIS trial.

Results: Of the 11,397 patients enrolled in LC-SCRUM-Asia, Exon20ins were detected in 189 patients (1.

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Nuclear protein of the testis carcinoma (NUTC) is a rare and aggressive malignancy. We herein report a case of NUTC in the lung characterized by a bronchial lesion and elevated alpha-fetoprotein levels. A 35-year-old Japanese man presented to our institution with suspected advanced lung cancer based on a histological examination.

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Purpose: Immune checkpoint inhibitors (ICIs) are ineffective against epidermal growth factor receptor (EGFR)-mutant non-small cell lung cancer (NSCLC). This study aimed to investigate the clinical characteristics of patients who were treated or not treated with ICIs, and of those who benefit from immunotherapy in EGFR-mutant NSCLC.

Methods: We analyzed patients with unresectable stage III/IV or recurrent NSCLC harboring EGFR mutations using a prospective umbrella-type lung cancer registry (CS-Lung-003).

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Article Synopsis
  • Persister cells are a type of cancer cell that resist treatment by slowing their growth and adapting to drugs, ultimately creating pathways for cancer to develop resistance.
  • The resistance is mainly due to epigenetic changes rather than permanent genetic mutations, with factors like stem-cell-like properties, changes in the tumor environment, and immune escape playing a role.
  • The article focuses on EGFR lung cancer, discussing why current treatments like EGFR tyrosine kinase inhibitors often fail and exploring potential new strategies to tackle resistance caused by persister cells.
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Background: Epidermal growth factor receptor () mutations, such as exon 19 deletion and exon 21 L858R, are driver oncogenes of non-small cell lung cancer (NSCLC), with EGFR tyrosine kinase inhibitors (TKIs) being effective against -mutant NSCLC. However, the efficacy of EGFR-TKIs is transient and eventually leads to acquired resistance. Herein, we focused on the significance of cell cycle factors as a mechanism to attenuate the effect of EGFR-TKIs in -mutant NSCLC before the emergence of acquired resistance.

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Article Synopsis
  • Tarlatamab is a bispecific T-cell engager immunotherapy that showed promising results in a phase 1 trial for patients with previously treated small-cell lung cancer.
  • In a phase 2 trial involving 220 patients, tarlatamab was administered intravenously every 2 weeks at doses of 10 mg or 100 mg, with an objective response rate of 40% and 32% respectively.
  • The study found that common side effects included cytokine-release syndrome, decreased appetite, and fever, with overall survival rates at 9 months being 68% for the 10-mg group and 66% for the 100-mg group.
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Article Synopsis
  • * About 100 days into treatment, he developed confusion, a high fever, and showed signs of liver and kidney dysfunction, eventually experiencing severe convulsions that led to an intensive care unit admission.
  • * He was diagnosed with cytokine release syndrome and immune effector cell-associated neurotoxicity syndrome, but his condition was managed with immunosuppressive drugs, allowing him to be discharged despite the rarity of successful outcomes in such cases during immunotherapy.
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Gilteritinib is a multitarget tyrosine kinase inhibitor (TKI), approved for the treatment of FLT3-mutant acute myeloid leukemia, with a broad range of activity against several tyrosine kinases including anaplastic lymphoma kinase (ALK). This study investigated the efficacy of gilteritinib against ALK-rearranged non-small cell lung cancers (NSCLC). To this end, we assessed the effects of gilteritinib on cell proliferation, apoptosis, and acquired resistance responses in several ALK-rearranged NSCLC cell lines and mouse xenograft tumor models and compared its efficacy to alectinib, a standard ALK inhibitor.

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Intracranial metastases are common in nonsmall-cell lung cancer (NSCLC) patients, whose prognosis is very poor. In addition, intracranial progression is common during systemic treatments due to the inability to penetrate central nervous system (CNS) barriers, whereas the intracranial effects of cancer immunotherapies remain unclear. We analyzed clinical data to evaluate the frequency of intracranial progression in advanced NSCLC patients treated with PD-1 blockade therapies compared with those treated without PD-1 blockade therapies, and found that the frequency of intracranial progression in advanced NSCLC patients treated with PD-1 blockade therapies was significantly lower than that in patients treated with cytotoxic chemotherapies.

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Introduction: BRAF non-V600E mutations occur in 1% to 2% of NSCLCs. Because of their rarity, the clinical backgrounds and outcomes of cytotoxic chemotherapy or immunotherapy remain unclear, and no targeted therapies are approved for BRAF non-V600E-mutant NSCLC.

Methods: In this multi-institutional prospective lung cancer genomic screening project (LC-SCRUM-Asia), we evaluated the clinicogenomic characteristics and therapeutic outcomes of BRAF non-V600E-mutant NSCLC.

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Article Synopsis
  • The KEYNOTE-407 trial found that combining pembrolizumab with chemotherapy improved overall and progression-free survival in patients with metastatic squamous non-small-cell lung cancer compared to placebo plus chemotherapy.
  • In the study involving Japanese patients, those receiving pembrolizumab had a median overall survival of 17.3 months versus 11.0 months for the placebo group, indicating better efficacy of the treatment.
  • Both treatment groups experienced significant adverse events, but the safety profile of pembrolizumab plus chemotherapy was in line with global findings, supporting its use in this population.
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Objectives: No immunotherapeutic protocol has yet been established in never-smoking patients with lung cancer harboring driver oncogenic mutations, such as epidermal growth factor receptor (EGFR) mutations. The immunostimulatory effect of Ad-REIC, a genetically engineered adenovirus vector expressing a tumor suppressor gene, reduced expression in immortalized cells (REIC), has been investigated in clinical trials for various solid tumors. However, the immunostimulatory effect of the Ad-REIC in EGFR-mutant lung cancer with a non-inflamed tumor microenvironment (TME) has not been explored.

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We encountered a woman with re-enlarged axillary lymph nodes during a computed tomography (CT) scan for surveillance of lung adenocarcinoma with axillary lymph node metastasis at the initial diagnosis that had shrunk with standard chemotherapy. We first suspected cancer recurrence and considered a change in the chemotherapeutic regimen. However, after careful history taking regarding the timing of her Coronavirus Disease 2019 (COVID-19) vaccination, and subsequent careful, close follow-up, radiological shrinkage suggested a strictly benign cause.

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Background: Selpercatinib is a first-in-class, highly selective RET kinase inhibitor with CNS activity that has shown efficacy in RET fusion-positive lung and thyroid cancers. RET fusions occur rarely in other tumour types. We aimed to investigate the efficacy and safety of selpercatinib in a diverse group of patients with RET fusion-positive non-lung or thyroid advanced solid tumours (ie, a tumour-agnostic population).

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Epidermal growth factor receptor (EGFR) is the most frequently mutated driver oncogene in nonsmoking-related, non-small cell lung cancer (NSCLC). EGFR-mutant NSCLC has a noninflamed tumor microenvironment (TME), with low infiltration by CD8+ T cells and, thus, immune-checkpoint inhibitors, such as antiprogrammed cell death-1 (anti-PD-1), have weak antitumor effects. Here, we showed that CD8+ T-cell responses were induced by an EGFR-tyrosine kinase inhibitor (TKI) in syngeneic Egfr-mutant NSCLC tumors, which was further pronounced by the sequential dual blockade of PD-1 and vascular endothelial growth factor receptor 2 (VEGFR2).

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Article Synopsis
  • Selpercatinib, a selective RET inhibitor, is being studied for its effectiveness and safety in Japanese patients with RET fusion-positive non-small cell lung cancer (NSCLC) in the ongoing LIBRETTO-001 trial.
  • The study found that out of 44 previously treated patients, 55.3% showed a positive response to the treatment, with some achieving partial or complete responses.
  • The main side effects reported were increases in liver enzymes and diarrhea, indicating that while the drug is generally effective, it does have some adverse reactions similar to previous findings.
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Tepotinib, the novel MET-tyrosine kinase inhibitor, shows an antitumor effect for patients with non-small-cell lung cancer (NSCLC) harboring MET exon 14 skipping mutation. In January 2022, the AmoyDx® Pan Lung Cancer polymerase chain reaction Panel (AmoyDx® panel), which had a shorter turnaround time than the conventional test, was launched in Japan as a tepotinib companion test. We report a patient with an advanced MET-mutant NSCLC promptly diagnosed using the AmoyDx® panel and successfully treated with tepotinib.

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Synopsis of recent research by authors named "Kadoaki Ohashi"

  • - Kadoaki Ohashi's recent research focuses on innovative therapies and treatment outcomes for various lung cancers, particularly targeting mutations associated with non-small cell lung cancer (NSCLC) and their responses to immunotherapies and targeted drugs.
  • - His studies include cases of complex conditions such as the interaction between coronavirus disease and chimeric antigen receptor-T cell therapy, as well as the successful treatment of lung cancer in patients with concurrent pulmonary diseases, highlighting the intricacies of managing dual diagnoses.
  • - Ohashi also investigates the mechanisms behind drug resistance in cancer cells, specifically addressing how persister cells can lead to treatment failure, thus emphasizing the need for new strategies in oncology that consider these resistance pathways.