Objective: To investigate the role of autophagy inhibitor chloroquine (CQ) in the proliferation of pulmonary arterial smooth muscle cells (PASMCs) in hypoxia conditions.
Methods: The following groups in this study were set up: control group, hypoxia group, 50 micromol/L CQ + hypoxia group, 50 micromol/L CQ group. The viability of PASMCs in every group was detected by MTT assay. Autophagic vacuoles in the cells were observed by MDC staining. Protein expression of microtubule associated protein light chain 3 (LC3) was measured by Western blot. Migration of PASMCs was detected by wound healing assay.
Results: Compared with control group, no effect on the viability of PASMCs was observed treated by CQ alone. In 1% hypoxia group, cell viability increased significantly compared with that in control group. The number of autophagic vacuoles and the rate of cell migration and also protein expression of LC3-II were also markedly increased. Compared with hypoxia group, addition of CQ increased the number of autophagic vacuoles and the levels of LC3-II protein, but decreased the proliferation and migration of PASMCs.
Conclusion: Hypoxia could activates autophagy and contributes to proliferation and migration of PASMCs, and autophagy inhibitor CQ could decrease the effect of hypoxia on PASMCs through inhibiting autophagy process.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Medical Problems of Chronic Hypoxia in Highlanders Living on the Tibetan Plateau.
High Alt Med Biol
January 2025
The Research Center for High Altitude Medicine, Qinghai University, Xining, China.
Ri-Li Ge. Medical problems of chronic hypoxia in highlanders living on the tibetan plateau. 00:00-00, 2024.
View Article and Find Full Text PDFPrognostic Value of Signal Abnormalities on Brain MRI in Post-Anoxic Super-Refractory Status Epilepticus: A Single-Center Retrospective Study.
Eur J Neurol
January 2025
Epilepsy Center, Department of Neurology, Fondazione IRCCS San Gerardo Dei Tintori, Monza, Italy.
Background: Epileptiform activity, including status epilepticus (SE), occurs in up to one-third of comatose survivors of cardiac arrest and may predict poor outcome. The relationship between SE and hypoxic-ischemic brain injury (HIBI) is not established.
Methods: This is a single-center retrospective study on consecutive patients with post-anoxic super-refractory SE.
Nocturnal pulse oxygen saturation dynamics at simulated high altitude: Predictive value for acute mountain sickness in healthy men born pre-term.
Exp Physiol
January 2025
Department for Automatics, Biocybernetics and Robotics, Jožef Stefan Institute, Ljubljana, Slovenia.
The physiological sequelae of pre-term birth might influence the responses of this population to hypoxia. Moreover, identifying variables associated with development of acute mountain sickness (AMS) remains a key practically significant area of altitude research. We investigated the effects of pre-term birth on nocturnal oxygen saturation ( ) dynamics and assessed the predictive potential of nocturnal -related metrics for morning AMS in 12 healthy adults with gestational age < 32 weeks (pre-term) and 12 term-born control participants.
View Article and Find Full Text PDFEfficacy and safety of daprodustat in patients on peritoneal dialysis in the ASCEND-D trial.
Nephrol Dial Transplant
November 2024
Department of Medicine and Nephrology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico.
Background And Hypothesis: Daprodustat, an oral hypoxia-inducible factor prolyl hydroxylase inhibitor, is approved for treatment of anemia in dialysis patients with CKD in some parts of the world. This subgroup analysis examined the efficacy and safety of daprodustat versus darbepoetin alfa in patients with anemia of CKD undergoing peritoneal dialysis (PD).
Methods: ASCEND-D (NCT02879305) was an open-label, Phase 3 trial; patients with CKD were randomized to daprodustat daily and epoetin alfa (HD patients) or darbepoetin alfa (PD patients).
Transarterial chemoembolization combined with lenvatinib and sintilimab lenvatinib alone in intermediate-advanced hepatocellular carcinoma.
World J Gastrointest Oncol
January 2025
Department of Interventional Radiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China.
Background: Hepatocellular carcinoma (HCC) is the most common form of liver cancer that has limited treatment options and a poor prognosis. Transarterial chemoembolization (TACE) is the first-line treatment for intermediate-stage HCC but can induce tumour hypoxia, thereby promoting angiogenesis. Recent studies suggested that combining TACE with anti-angiogenic therapies and immunotherapy might improve efficacy.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!