Cheek ; pathology ; Choristoma ; Humans ; Salivary Ducts

Since the instability of the spine caused by trauma,tumor,tuberculosis,deformity cor-rection and other reasons requires reconstruction,many scholars have conducted a large number of thorough researches,but the treatment options for unstable cervical spine still plague the clinicians.Considering the factors of stability and safety,more and more clinicians choose cervical pedicle screw placement as the treatment for spinal instability.In this work,the most common methods and the latest technologies of cervi-cal pedicle screw placement at home and abroad are summarized and reviewed.It provides references for clinical practices and presents the significance of high-tech assisted screw placement in the future.

With the development of nanotechnology,nanomaterials have great application potential in drug delivery system.Understanding the cellular uptake mechanism of nanoparticles has important scientific significance and application value in understanding life processes in cellular level,mechanisms of drug action and gene therapy,which provides the basis for developing safer and more effective nanosized drug carrier.This review summarizes the latest advancement about cellular uptake mechanisms of nanopatricles.Based on a brief introduction of the endocytic pathway of nanoparticles,influencing factors of endocytosis pathway are discussed,and the common methods used to study nanoparticle endocytosis pathways are also introduced in detail.

Agarases are glycoside hydrolases.They are grouped into?and?types,which hydrolyze?-1,3 linkages and?-1,4 linkages respectively.The paper is about advance in research of agarase including the research of biology,the classcification,the crystal structure,the catalysis mechanism and application of agarases.

Low back pain has a serious impact on people's lives in t he world.With the approaching of aging society in China,the number of low back pain increased rapidly.Though many of the pathological factors in spine might lead to low back pain,Modic changes (MCs) was one of the most important factors.Therefore,to get familiar with MCs in the etiology and pathology has a positive practical significance.Although a large number of studies have analyzed the epidemiological and imaging characteristics of MCs,there are relatively few studies on the histological and pathological fields of MCs.In recent years,researchers have gradually shed some light on etiology of MCs and found that low toxic bacterial infection and autoimmune reaction may play a vital role in the development of MCs.The damage of vertebral body or endplate is closely related to the etiopathogenesis of MCs.In addition,to reveal the pathological characteristic of MCs is also a good attempt for better understanding of MCs.There are various imaging changes in MCs,however,what is the pathological basis behind it.It is also unclear that why different types of MCs are capable of transformation? When MCs occur,the activation of some cytokines (such as IL-6,RANKL,etc.) and certain receptors (TLR,PPARγ,etc.) can interfere with the formation and metabolism of the nearby bone marrow cells,break the balance of formation and absorption in trabecular beam and further change their microstructures through various pathways.During this dynamic balance process,the different types of MCs can be transformed into each other.The specific type may not only depend on the intensity and duration of inflammatory stimulus,but also rely on the composition and metabolic status of the bone marrow.Although the study of animal models has made some progress,some limitations still exist in practical course.Due to the unclear mechanism of MCs,the study on etiology and pathology of MCs may play a great important role in clarifying this issue.

Objective To determine multiple inorganic anions in drinking water with ion chromatography,such as F~-,Cl~-, NO_2~-,Br~-,HPO_4~(2-),NO_3~-,SO_4~(2-).Methods The ion chromatography was used.The optimized conditions were explored.Results Under the selected flow rate(1.5 ml/min),the optimal concentration of eluent NaHCO_3 and Na_2CO_3 was 2.0?10~(-3)and 3.0?10~(-3) mmol/L,under the concentration of eluent,the optimum pump flow rate was 1.5 ml/min,the recovery rate was 94.69%-102.20%. Conclusion This method is applicable to the determination of multiple inorganic anions in drinking water.

Prostate cancer is a common malignancy that affects men's health in the Western countries. Single nucleotide polymorphisms (SNPs), as the third generation of genetic markers, can influence the development, progression, and prognosis of prostate cancer. The same SNP may be related differently with prostate cancer among different races. This paper describes the relationship between SNPs and prostate cancer according to their related genes. SNPs can predict the risk of prostate cancer as well as the possible adverse reactions in its treatment, but at present they do have some limitations.
Humans ; Male ; Polymorphism, Single Nucleotide ; Prostatic Neoplasms ; genetics

OBJECTIVETo evaluate the efficacy and safety of percutaneous pedicle screw fixation (PPSF) and open pedicle screw fixation (OPSF) in the treatment of single level of thoracolumbar fracture.

METHODSDatabases including Pubmed, Embasem, CNKI were searched to collect clinical trials of the clinical safety and efficiency of PPSF and OPSF for single level of thoracolumbar unstable fracture, relevant proceedings and references were also retrieved manually. Studies from 1990 to 2014 that met the inclusion and exclusion standards were researched. The data were extracted and the methods from the studies were also evaluated. Data analysis was conducted with the Review Manager 5.3 software. Observation targets included operation time, intraoperative bleeding, postoperative bleeding, hospitalization time, the bed time, postoperative vertebral Cobb angle, vertebral body height, pain score and the length of incision operation.

RESULTSFifteen papers were finally studied, including 2 randomized controlled trials (RCT) and 13 case-control studies, involving 789 patients. Compared with OPSF, the PPSF in treating thoracolumbar fracture had shorter operation time, smaller operation incision, less intraoperative and postoperation bleeding, shorter hospitalization days, fewer pain (P<0.00001), the less improvement in the change of Cobb angle (P=0.0006). There was no significant difference in the improvement of vertebral body height (P=0.36), the bed time from operation to exercise (P=0.38) between OPSF and PPSF.

CONCLUSIONCompared with OPSF, PPSF is better, safer, and has fewer pain. But there is no evidence that the PPSF is better in the recovery of the spinal height, and they have the same effect in the long-term follow-up for thoracolumbar fractures. PPSF brines minimally invasive to patients with better effect. It is worth further study and clinical research.

Adult ; Aged ; Female ; Fracture Fixation, Internal ; methods ; Humans ; Male ; Middle Aged ; Minimally Invasive Surgical Procedures ; methods ; Pedicle Screws ; Spinal Fractures ; surgery ; Thoracic Vertebrae ; surgery ; Treatment Outcome

OBJECTIVETo compare the difference in the clinical efficacy on post-stroke insomnia between the low-frequency electric stimulation at the acupoints and the conventional western medication.

METHODSOne hundred and twenty patients of post-stroke insomnia were randomized into a low-frequency electric stimulation group, a medication group and a placebo group, 40 cases in each one. In the low-frequency electric stimulation group, the low-frequency electric-pulsing apparatus was used at Dazhui (GV 14) and Shenshu (BL 23), once a day; the treatment of 15 days made one session and 2 sessions were required. In the medication group, estazolam was taken orally, 1 mg each time. In the placebo group, starch capsules were taken orally, 1 capsule each time. All the drugs were taken before sleep every night, continuously for 15 days as one session, and 2 sessions were required. PSQI changes and clinical efficacy were observed before and after treatment in each group.

RESULTSPitlsburgh sleep quality index (PSQI) score was reduced in every group after treatment (all P < 0.01). In the low-frequency electric stimulation group and medication group, the score was reduced much more significantly as compared with the placebo group (both P < 0.01). In the placebo group, 1 case was rejected. The total effective rates were 95.0% (38/40), 92.5% (37/40) and 17.9% (7/39) in the low-frequency electric stimulation group, medication group and placebo group separately. The efficacy in the low-frequency electric stimulation group and medication group was better apparently than that in the placebo group (both P < 0.01).

CONCLUSIONThe low-frequency electric stimulation at the acupoints effectively and safely treats post-stroke insomnia and the efficacy of it is similar to that of estazolam.

Acupuncture Points ; Aged ; Aged, 80 and over ; Electric Stimulation ; Female ; Humans ; Male ; Middle Aged ; Sleep Initiation and Maintenance Disorders ; etiology ; therapy ; Stroke ; complications ; Treatment Outcome

0.05). There was no neoplasia appeared at 12 weeks after implantation. Pathological section showed that nerve cell and medullary sheath were integrated without fibroplasia or necrosis, and only a little of infiltration of lymphocytes appeared. CONCLUSION: Activity and secretion function can be kept by the microencapsulation technique on PC12 cells. When microencapsulated PC12 cells were implanted into subarachnoid cavity, the cells can maintain good activity and secretion without oncogenicity.