Stromal cell-derived factor-1(SDF-1)is an early cell growth factor which belongs to a subfamily of chemokines.The CXCR4 is SDF-1 receptor.The SDF-1 interacting with CXCR4 plays important roles in physiological and pathological processes such as hematopiesis, stem cell homing,angiogenesis and leukemic cells infiltrating.To study the expression of CXCR4 in leukemia and the relationship between CXCR4 and leukemic cells infiltration can add indicators for leukemic MIC diagnosis of immunology indexes and have great significance to take molecule targeted therapy for preventing leukemia from infiltration or relapse as well.

Patent ductus arteriosus (PDA)is a common disease among premature neonates and the management of which has always been a challenge to the neonatologists. Early treatment has been advocated as the first-line approach, and drug induced closure is yet the most effective, inexpensive, and convenient method. During the last two decades,indomethacin was often given as conservative treatment, and its closure rate in PDA was approximately 46% ～ 89%. However,indomethacin may increase the number of undesirable or harmful effects including renal damage, intraventricular hemorrhage, necrotizing enterocolitis, and enterobrosis,etc. Recently,ibuprofen is rapidly emerging as a new promising drug for treatment of PDA in preterm infants with closure rate of 73.0% ～95.5%. It is used as standard therapy to close PDA,and it has less influence on the hemodynamics of kidneys, brain and gastrointestinal tract. The surgery is needed in patients with drug treatment failure and cardio-pulmonary function damage.

Micronutrients are closely associated with the progression of diabetes and its complications. Diabetic patients are susceptible to micronutrient deficiency. In this article, we summarize the preventive and therapeutic effects of micronutrients including zinc, selenium, magnesium, and chromium on diabetes mellitus.

Malignant obstructive jaundice is biliary obstruction caused by malignant tumors.When a patient presents to a doctor,he/she is usually too late to be operated,so endoscopic treatment has gradually replaced surgery in its management.Diagnostic endoscopic methods include endoscopic retrograde cholangiopancreatography (ERCP),endoscopic ultrasonography (EUS),and per oral cholangioscopy (POCS),etc.Biliary stent placement at ERCP is the mainstay of endoscopic palliation for jaundice.Other methods include EUS-guided bilioenteric drainage (EGBD),endoscopic radiofrequency ablation,intraluminal brachytherapy of bile duct,endoscopic photodynamic therapy,etc.Magnetic Compression Anastomosis Technique (MCAT) is a new technology which has been developed recently,and its role in the management of malignant obstructive jaundice remains to be seen.Science and technology have brought along progress in endoscopic and consumable technologies.It is predicted that in the future,endoscopic diagnosis and treatment will have more applications.

Objective　To study the effect of the combined use of aminoguanidine (AG) and cyclosporine A (CsA) on acute rejection following cardiac allograft. Methods　Except the control group, all other three groups were respectively treated by AG 600mg/kg every day subcutaneously 0 to 7 days after transplantation, low-dose CsA 2mg/kg every day i.m 0 to 7 days after transplantation, and low-dose CsA plus AG. Inducible nitric oxide synthase (iNOS) expression and nitric oxide (NO) production during acute allograft rejection were detected at 4th day after operation, and the graft survival was observed.Results　Compared with the control group, iNOS expression and NO production were significantly inhibited in the AG-treated group (P＜0.05)，the progression of acute rejection was slightly attenuated and allografted heart survival prolonged. The inhibitory effects of iNOS activity and NO production in the recipients receiving the combined treatment of low-dose CsA plus AG were higher than those receiving low-dose CsA alone. Compared with the low-dose CsA group, low-dose CsA plus AG could significantly reduce the histologic grade of acute rejection (P＜0.01) and prolong the graft survival (P＜0.05). Conclusion　The combined use of low-dose CsA and AG could synergistically suppress iNOS activity and NO production, and significantly prolong allografted heart survival.

We reported 2 cases of descending neerotizing mediastinitis (DNM) and reviewed the related literatures. The etiology, clinical manifestations, imaging manifestations, diagnostic criteria and therapeutic strategies of DNM were discussed. It is concluded that descending necrotizing mediastinitis is a life-threatening disease with high mortality and is prone to be misdiagnosed. Early diagnosis, prompt application of sensitive broad-spectrum antibiotics and abscess drainage with proper surgical medality may improve the prognosis of DNM.

OBJECTIVE:To improve response capacity of China to deal with intellectual property rights protection standard terms (Trips-plus terms) beyond the regulations of Agreement on Trade-related Aspects of Intellectual Property Rights (TRIPS), and to provide reference for improving national intellectual property rights protection policy. METHODS:Trips-plus terms and their common types were introduced to analyze their characteristics and consider about their adverse effects. RESULTS & CONCLU-SIONS:Common TRIPS-plus terms involve data protection,patent interlinkage,patent period extension,limitation of compulsory licensing and parallel importation,etc. These terms pose a significant challenge to developing countries,resulting in delaying entry of generics,increasing drug price,influencing drug accessibility and posing a great threat to public health. China,as the largest de-veloping country mostly relying on generic drugs,should scientifically assess the effects of TRIPS-plus on public health,drug ac-cessibility and pharmaceutical industry in the process of domestic legislation and negotiating a free trade agreement,and make effec-tive use of the TRIPS flexibility to protect the public health.

Tuo-Fawas one of three internal treatment rules in traditional Chinese medicine (TCM) surgery. It had been widely used in the treatment of superficial suppurative diseases, visceral suppurative diseases and other diseases. This article was aimed to clarify the action mechanism ofTuo-Fa for carrying forward better services in the clinic. This article reviewed and recapitulated related literatures on experimental researches ofTuo-Fa in recent years. It mainly showed the research status on anti-infection, anti-tumor and anti-gastric ulcer withTuo-Fa and its prescriptions. It summarized the existed shortcomings, which was that experimental researches on the action mechanism ofTuo-Fa was still on the initial stage with a few references and obviously lagged behind clinical applications. However, some achievements were also made. It had initially revealed the action mechanism ofTuo-Fa in treatment of pyogenic infection. It also had research on action mechanism of anti-tumor and anti-gastric ulcer treatment. It developed new field for the clinical practice. Finally, the research on action mechanism ofTuo-Fa and future prospects were expressed.

Journal of Clinical Endocrinology and Metabolism (JCEM), sponsored by U.S. Endocrine Society, is particularly appreciated by clinical endocrine doctors worldwide. It is intimately related to clinical practice while still catching up state of art research methods and recent discoveries and its creativity, novelty, scientific reliability, feasibility and readability are highly appraised. Compared to JCEM, our Chinese Journal of Endocrinology and Metabolism seems to be inadequate in certain aspects and needs to be improved in the future.

BACKGROUND: Iron metabolism disorder has been proved to be a key factor of Parkinson's disease, but research on brain iron metabolism is still immature, and the role of glial cells in the brain iron metabolism remains unclear. Many studies have pointed that microglia plays an important role in the pathogenesis of Parkinson's disease, which closely related to iron.OBJECTIVE: To further explore the relationship between microglia and neurons in iron metabolism based on our previous study, and to clarify the role of microglia in iron-induced selective damaged dopaminergic neurons of Parkinson's disease.METHODS: This was an in vitro cellular experiment, which was finished in the Medical College of Qingdao University, Shandong Province, China. The effects of conditioned medium of microglia on the survival rate of mesencephalic neurons and iron metabolism were observed by changing the iron levels in microglia.Lipopolysaccharide was used to activate different iron-loaded microglia, and then the effects of conditioned medium on the survival rate of mesencephalic neurons and iron metabolism were determined. The effects of different iron levels in microglia on microglia and inflammatory factors and lactoferrin released from the activated microglia were detected by siRNA and ELISA. The effects of these inflammatory factors and lactoferrin on the survival of mesencephalic neurons and iron metabolism were observed. The iron levels in mesencephalic neurons were changed, and then added into the above conditioned medium to observe the survival of neurons and iron metabolism. This experimental protocol was approved by the Hospital Ethics Committee (No. 01482311234). All experimental procedures were performed in accordance with the Guide for the Care and Use of Laboratory Animals issued by the United States National Institutes of Health.RESULTS AND CONCLUSION: Our study results show that the function of microglia is closely related to the iron metabolism in nigra dopaminergic neurons. Research on the rational use of microglia to prevent neuronal degeneration gives a strong impetus to the prevention and treatment of Parkinson's disease.