【Abstract】ObjectiveTo construct an mdr1 expression vector and detect its expression in HepG2 cells in vitro. MethodsThe 4.5-kb mdr1 cDNA was obtained from the plasmid pHaMDR1 cloned into the PCIneo mammalian expression vector, which was later transferred into human hepatocarcinoma cell line HepG2 by liposome. Then the HepG2 cells resisting G418 were clustered and proliferated,and the specific fragment of mdr1 cDNA, mRNA and the Pgp in these HepG2 cells were detected by means of PCR, RT-PCR and FCM respectively. ResultsThe mdr1 expression vector was constructed successfully,and the stable multidrug resistance(MDR) hepatocarcinoma cell line (HepG2/mdr1) was developed as well. The outcome of PCR analysis showed that the specific fragment of mdr1 cDNA could be found in HepG2/mdr1 cells, but not in the nontransfection HepG2 cells. Furthermore,the content of the specific fragment of mdr1 mRNA and the expression of P-gp in HepG2/mdr1 cells were (59.7±7.9)% and (12.5±5.45)% respectively, the corresponding value in HepG2 cells were (16.9±3.2)% and (4.63±2.59)% respectively. The difference was statistically significant (P<0.05). ConclusionIt is praticable to develop MDR hepatocarcinoma cell line by transferring mdr1 cDNA into HepG2 cells, which is useful in the research of MDR mechanism.
In response to the current situation of regional medical and health hierarchical diagnosis and treatment services and the existing problems in the continuity of medical services, this article applies supply chain management methods, system collaboration theory, and service ecosystem concepts to treat medical consortia as an organic whole. Based on the quality and efficiency of disease management in the whole life cycle of patients with difficult, complex and severe diseases, a multi-level and multi-disciplinary medical service supply chain model of difficult, complex and severe disease medical consortium is constructed with four core elements: patient flow, service flow, technology flow and information flow. This article provides a certain reference for the implementation of regional hierarchical diagnosis and treatment and the formulation of relevant policies in China from the perspective of theoretical research.
Multi-disciplinary team (MDT) is a leading diagnosis and treatment model widely respected in modern international medical field, which plays an important role in clarifying disease diagnosis, determining treatment direction, and reducing patient time and labor cost. In recent years, China has issued relevant policies to encourage hospitals to vigorously develop MDT. West China Hospital of Sichuan University established a MDT clinic in 2013. Through continuous innovation and bold breakthrough in terms of experience accumulation, clinical resource integration, disciplinary collaboration and other aspects, the hospital breaks the barriers of MDT, timely helps complex severe diseases patients to solve the diagnosis and treatment needs, provides patients with the best personalized treatment plan, and continuously improves the medical experience of patients. Therefore, this article introduces and summarizes the implementation process and experience of MDT outpatient clinic in West China Hospital of Sichuan University.