BACKGROUND: Bone defects forming after resection of bone tumor and tumor-like lesion are often packed with autogeneic bone. But sample amount cannot completely meet the clinical demand and different degrees of complications are often left in the bone graft donor region. All these problems remarkably limit the application of autogeneic bone. Allogenic bone is increasingly widely used in the clinical practice due to its structure and biological characteristics similar to autogeneic bone, rich sources, long-term preservation, easy to use and other advantages. OBJECTIVE: To investigate the biocompatibility and clinical application effects of allogeneic bone in filling and repairing benign bone tumor and tumor-like lesion after resection and curettage.DESIGN: A retrospective analysis. SETTING: Department of Pelvis Surgery, Second Affiliated Hospital of Inner Mongolia Medical College. PARTICIPANTS: Totally 230 patients (156 males and 74 females, with age of 5-56 years) were admitted to Department of Bone Tumor, Second Affiliated Hospital of Inner Mongolia Medical College from December 1999 to December 2005 to undergo curettage and hyperthermia inactivation due to benign bone tumor and tumor-like lesion and to receive the treatment by filling and repairing bone defects with lyophilized small-segment allogeneic bone, and were recruited for this study. Written informed consents of treatment were obtained from all the patients. The protocol was approved by the Hospital's Ethics Committee. METHODS: Allogeneic bone grafts (Shanxi Aorui Biomedical Co.,Ltd /Shanxi Provincial Medical Tissue Banking) were used to fill and repair bone defects. Patients who had benign bone tumor, bone cyst or osteofibrous dysplasia underwent cyst curretage. Allogeneic bones were used to pack empty cavity. Therapeutic effects were assessed according to the scoring criteria of allogeneic bone transplantation from Mankin et al, consisting of satisfactory and unsatisfactory two levels. X-ray plain films of surgery sites were taken at postoperative 3, 6 and 12 months. The patients were followed up for 38 months on average in order to observe the therapeutic effects. MAIN OUTCOME MEASURES: Histocompatibility of allogeneic bone in filling and repairing bone tumor defects. RESULTS: All 230 patients participated in the final analysis. ① Biocompatibility of allogeneic bone: Postoperatively, minority of patients had mild immunological rejections. Such allogeneic bone grafts had a good biocompatibility. They could directly fuse with bone tissue in the implantation location of patients, but not inhibit the normal activity of osteocytes on the allogeneic bone grafts or interfere the natural substitution of autogeneic osteocytes, i.e. there were no or less immunological rejections. Bone union was obtained in all the patients at postoperative 6-18 months (6.5 months on average). Thirty-four patients presented exudation of light yellow liquid from incision. Incisions healed in 30 (14.8%) patients at postoperative 2 weeks and in 4 (1.7%) in later time. Altogether 196 (85.2%) patients obtained satisfactory therapeutic effects, but 34 (14.8%) obtained unsatisfactory therapeutic effects. CONCLUSION: Small-segment allogeneic bones have good histocompatibility and osteogenesis, and they are good bone grafts in the bone transplantation.

Acute Disease ; Adult ; Female ; Herbicides ; poisoning ; Humans ; Male ; Middle Aged ; Paraquat ; poisoning ; Retrospective Studies ; Young Adult

Objective To study the growth inhibitory and apoptosis inducting effect of paclitaxel on human osteoblastic cell line U-2 OS. Methods U-2 OS cells were treated with various concentrations of paclitaxel. Proliferation was determined by cell count in a Neubauer cytometer chamber. Viability was assessed by trypanblau dye exclusion. Paclitaxel induced morphologic alterations were visualized, using light and transmission electron microscopy. The extent of paclitaxel induced apoptosis was determined by flow cytometry and immunohistochemical detection (TdT mediated dUTP nick end labeling technique, TUNEL). Results Paclitaxel had a growth inhibitory and apoptosis inducting effect on U-2 OS cell. The cell treated with paclitaxel initially show G2/M arrest; follow by apoptosis. A characteristic apoptosis change including nuclear disintegration and chromatin agglomerate were displayed. Lots of multinucleate cells appeared, which was not seen on the cell treated with other chemotherapeutic agents such as cisplatin and adriamycin. Also, extensive DNA cleavage was detected by immunohistochemical technique. Conclusion Paclitaxel has an obvious growth inhibitory and apoptosis inducting effect on osteosarcoma cell line by induce a G2/M arrest and inhibit the mitosis. The effect of paclitaxel displays a time dependent and dose dependent manner.

Objective To research the relationship among the disc protrusion on MRI, sex, age, course and the clinical types. Methods MRI was performed for 102 patients. The disc protrusion was divided into three types. According to clinical types, the patients were divided into four types. Statistically, age, course, clinical type and protrusion on MRI were analyzed by SPSS13.0. Results The age was not related with the clinical types and disc protrusion on MRI. There were obvious relations between clinical types and course. There were obvious relations between clinical types and disc protrusion. Conclusion The clinical types are very important on diagnosis of disease stages and choice of therapy in treating lumbar disc protrusion.

Enhanced biological phosphorus removal (EBPR) is widely accepted as one of the most economical and sustainable processes to remove phosphorus from wastewater.Poor performance or complete failure of EBPR processes has been substantially reported because of the proliferation of glycogen-accumulating organisms (GAOs) in the system.This paper presented the GAOs' metabolic mechanism and the impact factors, such as influent substrate, P/C ratio, pH value, temperature and SRT, on competition between GAOs and PAOs to better understand GAOs' characteristics and improve the performance and reliability of EBPR systems.

Objective Improve the level of education of medical information to promote faster and better development of medical information.Methods According to the disciplinary development lag,weak teachers' drawbacks of medical education and medical information technology status quo,research talent development solutions.Results Departure from the practice of medical information is proposed to establish and improve the incentive mechanism,curriculum system and teaching content changes,the establishment of hospital information system simulation laboratory recommendations.Conclusion For the development and maturation of the education of medical information,to promote the cultivation of medical information,certain referential significance.

Adult ; Air Pollution, Indoor ; adverse effects ; Benzene ; adverse effects ; Control Groups ; Female ; Humans ; Leukocyte Count ; Male ; Middle Aged ; Occupational Exposure ; adverse effects ; Paint

Adenocarcinoma ; drug therapy ; pathology ; surgery ; Adenoma, Villous ; drug therapy ; pathology ; surgery ; Adult ; Cell Transformation, Neoplastic ; Follow-Up Studies ; Humans ; Male ; Neoplasm Recurrence, Local ; Urinary Bladder Neoplasms ; drug therapy ; pathology ; surgery

A Review: A concept of tissue adaptation to hypoxia (i. e. hypoxic preconditioning) was developed and its corresponding animal models were reproduced in 1966s. The methods of model reproduction in rat, rabbit, and mouse in particular and the main results are briefly introduced in this review. The tolerance to hypoxia of preconditioned animals is significantly increased. Regular changes in animals' behavior, neurophysiology, respiratory and circulatory physiology, neuron morphology in vivo and function of brain and spinal cord in vitro are briefly demonstrated. The protective effects in vivo and in vitro of homogenate extract taken from the brain of preconditioned animals, neurochemicals and molecular neurobiological alterations are briefly presented. The essence and significance of tissue adaptation to hypoxia/hypoxic preconditioning are discussed in the review in terms of evolution and practical implication.
Animals ; Brain ; metabolism ; physiology ; Disease Models, Animal ; Hypoxia ; metabolism ; Mice ; Rabbits ; Rats

BACKGROUND: Nitric oxide in the central nervous system is involved in controlling the sympathetic outflow. The authors' recent data show that the reduction of nitric oxide in the rostral ventrolateral medulla (RVLM)enhanced the cardiac sympathetic afferent reflex (CSAR) evoked by stimulating the cardiac sympathetic afferent nerves in rats with chronic heart failure (CHF).OBJECTIVE: To further investigate the effect of nitric oxide in the RVLM on modulating the CSAR evoked by epicardial chemical stimulation in rats with CHF.DESIGN: Randomized controlled experiment.SETTING: Department of Physiology, Nanjing Medical University, and Department of Cellular and Integrative Physiology, University of Nebraska College of Medicine.MATERIALS: This study was carried out in the Department of Physiology, Nanjing Medical University from July 2003 to May 2004. A total of 52male Sprague-Dawley rats weighing 360-420 g were used, and were randomly divided into chronic heart failure group and control group with 23 in each group.METHODS: The rats were carried out either sham surgery or the left coronary artery ligation. Six to eight weeks later, all rats were anesthetized with α-chloralose and urethane and baroreceptor denervated and vagotomized. The CSAR was evoked by epicardial application of bradykinin (BK, 0.04 μg and 0.4 μg in 2.0 μL) to mimic the effect of chemical stimulation on the heart in the CHF state. The renal sympathetic nerve activity (RSNA), mean arterial pressure (MAP) and heart rate (HR) were recorded at baseline and during elicitation of the CSAR. Cannulae were inserted into the RVLM for microinjections.croinjection of MeTC, a nitric oxide synthase inhibitor, into the RVLM on Effects of epicardial pretreatment with lidocaine on the CSAR in CHF rats.infarction of (30.6±2.0) % of the left ventricular (LV) surface. The systolic arterial pressure, pulse pressure, left ventricle peak systolic pressure and maximum of the first differentiation of left ventricular pressure were decreased and the left ventricular end-diastolic pressure was significantly ininto the RVLM had no significant effects on the CSAR in rats with CHF,of SNAP (50 nmol) into the RVLM inhibited the CSAR in both sham rats ventricle abolished the CSAR evoked by epicardial application ofBK on the same area.CONCLUSION: Nitric oxide in the RVLM inhibits the CSAR evoked by epicardial application of BK in normal rats and CHF rats, and the reduction of nitric oxide in the RVLM led to the augmentation of the CSAR in CHF rats.