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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: .
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Does ultrasound-guided RNA interference targeting HIF-1 alpha improve the effects of transarterial chemoembolization in rat liver tumors? Context: To investigate whether ultrasound-guided RNA interference (RNAi) targeting hypoxia-inducible factor-1alpha (HIF-1α) can enhance the efficacy of transarterial chemoembolization (TACE) in treating hepatocellular carcinoma. Rats with orthotopic hepatocellular carcinoma were randomized to four groups and treated as follows: 1) control; 2) siHIF-1α; 3) TACE; 4) siHIF-1α+TACE. Lentivirus (4×10(8) transfection units) with or without small interfering RNA (siRNA) expression in 0.6 mL transduction reagent was injected into tumors using a standard 1 mL syringe under ultrasonic guidance. In the siHIF-1α+TACE and siHIF-1α groups, rats received siRNA-expressing lentivirus; the rats in the TACE and control groups received lentivirus without siRNA. TACE was performed by placing a microcatheter into the gastroduodenal artery. The median survival time, body weight, and tumor volume of the siHIF-1α+TACE group were better than those of the TACE, siHIF-1α, and control groups. A comparative analysis of the different treatment groups demonstrated that HIF-1α RNAi could downregulate the levels of HIF-1α and VEGF, inhibit tumor angiogenesis, and lessen metastases; all of these effects were enhanced by TACE.
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HIF-1α RNAi, which was administered in vivo in liver tumors under ultrasound guidance, improved the efficacy of TACE in treating hepatocellular carcinoma in an animal model. Final Decision: yes