Department of Gastroenterology, Taihe Hospital, Yunyang Medical College, Shiyan 442000, China.
Published: May 2005
AI Article Synopsis
Article Abstract
Objective: To investigate the relationship between the expression of COX-2 and liver cancer and construct a recombinant adenovirus encoding human COX-2 antisense RNA, and then to investigate its effects on liver cancer cell proliferation.
Methods: The expression of COX-2 in 34 cases of hepatocellular carcinoma and in SMMC-7402 and SMMC-7721 cell lines was studied by using immunohistochemical techniques. The shuttle plasmid encoding anti-sense COX-2 was constructed by using cloning COX-2 cDNA fragment in the reverse direction into the pHCMVSPIA. Then the plasmid pJM17 and the shuttle plasmid were co-transferred into 293 cells with lipofectamine for homologous recombination to acquire recombinant adenovirus (Ad-AShcox-2), which was confirmed by PCR. Human hepatocellular carcinoma cell lines SMMC-7402 and SMMC-7721 were transduced in vitro. The cell apoptosis and cell cycle were analyzed by flow cytometry. The cell proliferation was determined by colony-forming efficiency.
Results: We observed COX-2 expression in 82.4% of the hepatocellular carcinomas and SMMC-7402 cell line, but no COX-2 expression in the SMMC-7721 cell line. In addition, the recombinant adenovirus encoding anti-sense COX-2 fragment Ad-AShcox-2 was obtained with a titer of 1.06 x 10(12) PFU/ml. Ad-AShcox-2 reduced the expression of COX-2 and enhanced the percentage of cells into G1/G0 phase in the SMMC-7402 cell line. The difference of apoptotic index between the Ad-AShcox-2 group and the control group was statistically significant in SMMC-7402 but not in SMMC-7721. Similarly, colony-forming rates of SMMC-7402 and SMMC-7721 cell lines after Ad-AShcox-2 being transferred were (2.7+/-0.94)% and (33.6+/-4.24)%, respectively.
Conclusion: By reducing the expression of COX-2 in hepatocellular carcinoma cells with the expression of COX-2, the cells could be inhibited.
Introduction: Osteoarthritis (OA) is a chronic degenerative joint disease characterized by the progressive degradation of articular cartilage, resulting in pain and reduced mobility. Turmeric ( L.) has been widely recognized for its anti-inflammatory and antioxidant properties, but the molecular mechanisms underlying its therapeutic effects remain inadequately explored.
Department of Anesthesiology, West China Second University Hospital, Sichuan University, No. 20, Section 3, South of Renmin Road, Chengdu, 610041, Sichuan, China.
Background: Preterm birth, a leading cause of perinatal mortality and morbidity, is often associated with inflammation and aberrant myometrial contractions. This study investigates the role of Piezo1, a mechanosensitive ion channel, in myometrium contraction and inflammation-associated preterm birth.
Methods: We employed Western blotting, Immunofluorescence, and Quantitative real-time PCR techniques to examine Piezo1 expression in uterine tissues.
L (Malvaceae) was a traditional Chinese medicine with significant anti-inflammatory activity. We isolated 3 compounds from the flowers of L , including a new flavonoid, (1″R)-8-(1-(3,4-dihydroxyphenyl)ethyl)-3,3',5,7-tetrahydroxy-4'-methoxyl flavone (), and 2 known flavonoids (). The structures of these compounds were elucidated by various spectroscopic methods.
The main causes of failure for cartilage tissue engineering implants are tissue integration, inflammation, and infection. The development of biomaterials with antiforeign body response (FBR) is of particular importance. Herein, we developed a hydrogel loaded with anti-inflammatory drugs to reduce the inflammatory response that follows implantation.
Non-steroidal anti-inflammatory drugs (NSAIDs) are popular choices for the mitigation of pain and inflammation; however, they are accompanied by side effects in the gastrointestinal and cardiovascular systems. We compared the effects of naproxen, a traditional NSAID, and celecoxib, a cyclooxygenase - 2 (Cox-2) inhibitor, in humans. Our findings showed a decrease in tryptophan and kynurenine levels in plasma of volunteers treated with naproxen.
