[Inhibitory effect of low-intensity pulsed ultrasound on apoptosis of splenic lymphocytes in septic rats]

Anti-tumor effect of innovative tumor treatment device OM-100 through enhancing anti-PD-1 immunotherapy in glioblastoma growth

Glioblastoma (GBM) is associated with a median survival rate of less than 15 months, necessitating innovative treatment approaches. This study investigates the safety and efficacy of the low-frequency magnetic field (LFMF) OM-100 instrument in GBM therapy. In vitro experiments utilized normal astrocyte and GBM cell lines, determining that OM-100 at 100 kHz for 72 h selectively targeted GBM cells without harming normal cells. Subsequent analyses revealed OM-100's impact on cell viability, apoptosis, migration, invasion, reactive oxide species levels, and PD-L1 expression. In vivo studies on mice with U87-induced GBM demonstrated OM-100's synergy with anti-PD-1 therapy, leading to significant tumor volume reduction and increased apoptosis. Notably, OM-100 exhibited safety in healthy mice. Overall, OM-100 could enhance anti-PD-1 immunotherapy effectiveness probably by directly inhibiting tumor proliferation and migration as well as promoting PD-L1 expression, offering a promising therapeutic strategy for GBM treatment.

[Huangpu Tongqiao Capsule improves cognitive impairment in rats with Wilson disease by inhibiting endoplasmic reticulum stress-mediated apoptosis pathway]

OBJECTIVE

To investigate the neuroprotective effect of Huangpu Tongqiao Capsule (HPTQ) in a rat model of Wilson disease (WD) and explore the underlying mechanisms.

METHODS

SD rat models of WD were established by feeding of coppersupplemented chow diet and drinking water for 12 weeks, and starting from the 9th week, the rats were treated with low-, moderate- and high-dose HPTQ, penicillamine, or normal saline by gavage on a daily basis for 3 weeks. Copper levels in the liver and 24-h urine of the rats were detected, and their learning and memory abilities were evaluated using Morris water maze test. HE staining was used to observe morphological changes of CA1 region neurons in the hippocampus, and neuronal apoptosis was detected with TUNEL staining. Hippocampal expressions of endoplasmic reticulum stress (ERS)-mediated apoptosis pathway-related proteins GRP78, CHOP, caspase-12, cleaved caspase-9, and cleaved caspase-3 at both the mRNA and protein levels were detected using RT-qPCR, immunofluorescence assay or Western blotting.

RESULTS

Compared with normal control rats, the rat models with copper overload-induced WD exhibited significantly increased copper levels in both the liver and 24-h urine, impaired learning and memory abilities, obvious hippocampal neuronal damage in the CA1 region and increased TUNEL-positive neurons (P<0.01), with also lowered mRNA and protein expressions of GRP78, CHOP, caspase-12, cleaved caspase-9, and cleaved caspase-3 in the hippocampus (all P<0.01). Treatments with HPTQ and penicillamine significantly lowered copper level in the liver but increased urinary copper level, improved learning and memory ability, alleviated neuronal damage and apoptosis in the hippocampus, and decreased hippocampal expressions of GRP78, CHOP, caspase-12, cleaved caspase-9, and cleaved caspase-3 in the rat models (P<0.01 or 0.05).

CONCLUSION

HPTQ Capsule has neuroprotective effects in rat models of WD possibly by inhibiting ERS-mediated apoptosis pathway.