Publications by authors named "Hiroyasu Kobayashi"

Adjuvant chemotherapy is commonly indicated in lung cancer patients undergoing surgical therapy because tumor recurrence is frequent. A biomarker that can predict tumor recurrence in the postoperative period is currently unavailable. CXCR4 receptor and its ligand CXCL12 play important roles in metastasis.

View Article and Find Full Text PDF

Radiation-induced lung damage (RILD) is a critical problem in lung cancer radiotherapy, and it is difficult to predict its severity. Although no biomarkers for RILD have been established, tenascin C (TNC) is an extracellular matrix glycoprotein involved in the remodeling of damaged tissues and has been implicated in inflammation and fibrosis. We report the unique case of a 36-year-old man with adenocarcinoma of the lung, Union for International Cancer Control stage IIIB, who was treated with radiotherapy before lung surgery.

View Article and Find Full Text PDF

The long-term effects of using a high-flow nasal cannula for chronic hypercapnic respiratory failure caused by chronic obstructive pulmonary disease remain unclear. To assess whether long-term high-flow nasal cannula use reduces the number of exacerbations and improves other physiological parameters in patients with chronic hypercapnic respiratory failure caused by chronic obstructive pulmonary disease. We enrolled 104 participants (aged ⩾40 yr) with daytime hypercapnia (Global Initiative for Chronic Obstructive Lung Disease stages 2-4) receiving long-term oxygen therapy (⩾16 h/d for ⩾1 mo) and randomly assigned them to high-flow nasal cannula/long-term oxygen therapy and long-term oxygen therapy groups.

View Article and Find Full Text PDF
Article Synopsis
  • Current pneumonia treatment typically depends on where the infection was acquired (like community or hospital), but this study suggests focusing on individual risk factors for multidrug-resistant (MDR) pathogens instead.
  • In a study of 1,089 patients with different types of pneumonia, about 83% were treated according to a new algorithm based on MDR risks, leading to better outcomes and lower inappropriate treatments (4.3%).
  • The findings revealed that patients with multiple MDR risk factors had a significantly higher prevalence of MDR pathogens and a higher 30-day mortality rate compared to those with fewer risks, highlighting the importance of personalized risk assessment over pneumonia classification.
View Article and Find Full Text PDF

Introduction: Alectinib and crizotinib have been approved for the therapy of NSCLC caused by anaplastic lymphoma kinase gene (ALK) rearrangement. The effect of alectinib or crizotinib on overall survival (OS) in patients with ALK-rearranged NSCLC remains unknown.

Methods: A multicenter retrospective study was conducted to compare OS between patients receiving alectinib and crizotinib and between patients treated with alectinib and those treated sequentially with crizotinib and then alectinib after crizotinib failure.

View Article and Find Full Text PDF

Background: Optimal empiric therapy for hospitalized patients with healthcare-associated pneumonia (HCAP) is uncertain.

Methods: We prospectively applied a therapeutic algorithm, based on the presence of risk factors for multidrug-resistant (MDR) pathogens in a multicenter cohort study of 445 pneumonia patients, including both community-acquired pneumonia (CAP; n = 124) and HCAP (n = 321).

Results: MDR pathogens were more common (15.

View Article and Find Full Text PDF

Background And Objective: Interstitial lung diseases (ILD) are characterized by progressive interstitial pulmonary fibrosis and a decline in lung function. Fibrocytes are bone marrow-derived mesenchymal progenitor cells that may play a role in the pathogenesis of pulmonary fibrosis. Circulating fibrocyte numbers have been correlated with the prognosis of patients with idiopathic pulmonary fibrosis.

View Article and Find Full Text PDF

Background: Bronchial asthma is an inflammatory disease of the airways. Thrombin-activatable fibrinolysis inhibitor (TAFI) is a carboxypeptidase that besides inhibiting fibrinolysis, also regulates inflammatory processes. The only validated substrate known for TAFI is fibrin.

View Article and Find Full Text PDF

Introduction: Benign metastasizing leiomyoma in the lung is a very rare disease characterized by the growth of uterine leiomyoma tissue. In most cases there is a previous history of hysterectomy for uterine leiomyoma.

Case Presentation: A 50-year-old Asian woman underwent a total abdominal hysterectomy for uterine leiomyoma at the age of 37 years old.

View Article and Find Full Text PDF
Article Synopsis
  • A 64-year-old man with diabetes was hospitalized after his condition worsened despite treatment with voriconazole for a lung infection.
  • A chest CT scan revealed a large fungus ball and consolidation in his right lung, leading to a diagnosis of invasive aspergillosis caused by Aspergillus fumigatus.
  • The patient was treated with high-dose liposomal amphotericin B for 8 weeks, resulting in significant improvement and the elimination of the fungus ball, with no major side effects.
View Article and Find Full Text PDF
Article Synopsis
  • * The symptoms of pneumonia caused by the resistant strain were similar to those caused by the sensitive strain, indicating no obvious clinical differences.
  • * Genetic analysis revealed specific mutations in the 23S rRNA gene, leading to high resistance to erythromycin; while common in children, doctors should also consider this resistance in adult patients.
View Article and Find Full Text PDF

Objective: To determine the efficacy of a 23-valent pneumococcal polysaccharide vaccine in people at high risk of pneumococcal pneumonia.

Design: Prospective, randomised, placebo controlled double blind study.

Setting: Nursing homes in Japan.

View Article and Find Full Text PDF
Article Synopsis
  • - The study examined seasonal changes in throughfall (TF) and stemflow (SF) chemistry in a Japanese cedar forest, revealing distinct trends in ion fluxes influenced by seasonal winds.
  • - Canopy interactions significantly affected the fluxes of NH4+ and K+ ions, with water droplet behavior on leaves changing as they aged, impacting ion absorption and leaching.
  • - A decrease in the contact angle (CA) of water droplets on older leaves correlated with higher NH4+ fluxes, while K+ levels were negatively affected, suggesting that increased wettability may enhance nutrient uptake and leaching.
View Article and Find Full Text PDF

To assess the interaction of Pneumocystis carinii with dendritic cells (DCs), and the consequences of the response of the host immune system to P. carinii antigens when DC are pulsed with P. carinii, murine DC were pulsed with P.

View Article and Find Full Text PDF

Radiological and histological correlation was evaluated in patients with malignant tumors of the lung that underwent radiofrequency ablation (RFA). One of the patients had a primary lung tumor and another patient had three metastatic lung tumors. RFA was performed under computed tomography (CT) fluoroscopic guidance.

View Article and Find Full Text PDF

Lung radiofrequency (RF) ablation was performed for the treatment of a primary lung cancer measuring 2.5 cm in maximum diameter in a 78-year-old man. A contrast-enhanced computed tomography (CT) study performed 3 months after RF ablation showed incomplete ablation of the lung tumor and the appearance of a chest wall tumor 4.

View Article and Find Full Text PDF

X-linked immunodeficiency with hyper-IgM (HIGM1), characterized by failure of immunoglobulin isotype switching, is caused by mutations of the CD40 ligand (CD40L), which is normally expressed on activated CD4(+) T cells. As constitutive expression of CD40L induces lymphomas, we corrected the mutation while preserving the natural regulation of CD40L using pre-mRNA trans-splicing. Bone marrow from mice lacking CD40L was modified with a lentivirus trans-splicer encoding the normal CD40L exons 2-5 and was administered to syngenic CD40L-knockout mice.

View Article and Find Full Text PDF