TIM3 on natural killer cells regulates antibody-dependent cellular cytotoxicity in HER2-positive gastric cancer.

Therapies targeting HER2 are the standard treatment for HER2-positive gastric cancer (GC). Trastuzumab, a monoclonal antibody against HER2, exerts anti-tumor activity through cell growth regulation and antibody-dependent cellular cytotoxicity (ADCC). ADCC is induced by the binding of trastuzumab to Fcγ receptor III (CD16) in natural killer (NK) cells.

[A Case of Hepatocellular Carcinoma with Simultaneous Bone Metastasis Successfully Treated with Multidisciplinary Therapy].

The patient was a 52-year-old male, who, after experiencing lower back pain, underwent further investigation and was diagnosed with hepatocellular carcinoma with sacral metastasis. The hepatocellular carcinoma was a 9 cm tumor with a risk of rupture. Liver resection was performed, and lenvatinib was initiated at a dose of 4 mg/day postoperatively.

A Novel Series of Coumarin Derivatives That Exert Osteoblastogenic Effects in Mesenchymal Stem Cells and Osteogenic Effects in Ovariectomized Female Rats.

Osteoporosis is treated with oral and parenteral resorption inhibitors and parenteral osteogenic drugs. However, orally active small-molecule osteogenic drugs are not clinically available. Natural coumarin derivatives, such as osthole, exert osteoblastogenic effects.

Booster COVID-19 mRNA vaccination ameliorates impaired B-cell but not T-cell responses in older adults.

Age-associated differences in the effect of repetitive vaccination, particularly on memory T-cell and B-cell responses, remain unclear. While older adults (aged ≥65 years) exhibited enhanced IgG responses following COVID-19 mRNA booster vaccination, they produced fewer spike-specific circulating follicular helper T cells-1 than younger adults. Similarly, the cytotoxic CD8 T-cell response remained diminished with reduced PD-1 expression even after booster vaccination compared with that in younger adults, suggesting impaired memory T-cell activation in older adults.