BACKGROUND: Under wear particles stimulation, mononuclear macrophages, fibroblasts, and osteoblasts can produce a large amount of inflammatory factors, leading to periprosthetic osteolysis. But the precise mechanisms remain unclear. OBJECTIVE: To analyze the molecular biological mechanism underlying osteolysis induced by titanium wear particles . RESULTS AND CONCLUSION: Cleaned titanium particles stimulation induced an unbalanced ratio of RANK mRNA to OPG mRNA. Over-expressed RANK bound to RANK ligand and promoted osteolysis. No RANK mRNA expression was detected in the LPS group, but OPG mRNA expression was transiently increased at 4 hours. NF-κB/inflammatory cytokine, rather than RANK/OPG, is the main signal pathway for LPS to induce osteolysis. After LPS binding to titanium particles, these two signal mechanisms, RANK/OPG and NF-κB/inflammatory cytokine, have synergistic effects during artificial joint loosening.

AIM: To study regional cerebral blood flow (rCBF) and neuronal apoptosis in penumbra following focal cerebral infarction in rats.METHODS: To establish the model of focal cerebral infarction based on the principle of photochemical initiation of thrombosis.Laser Doppler flowmetry was used to measure rCBF in ischemic core and penumbra.The numbers and anatomic distribution of apoptosis cells were examined in situ histologically with terminal deoxynucleotidyl transferase(TdT)-mediated dUTP-fluorescein nick end-labeling(TUNEL) assay in adjacent sections.RESULTS: rCBF in penumbra decreased to the minimum at(6 h) in which it was 30.88%?7.11% of normal.From 9 h to 48 h,rCBF in penumbra increased gradually.At 48 h,91.90%?4.56% of normal cerebral blood flow was recovered which was significant differences than others.Terminal deoxynucleotidyl transferase(TdT)-mediated dUTP-fluorescein nick end-labeling(TUNEL) assay demonstrated that TUNEL-positive cells occurred at 6 h and were expending in a radial fashion only in penumbra.The numbers of apoptosis cells were progressively increased with time and to the maximum in penumbra after 48 h following focal cerebral infarction.CONCLUSION: There were delayed neuronal apoptosis following focal cerebral infarction.The mechanism may be related to ischemia-reperfusion injury induced by the recovery of rCBF in penumbra.

The morbidity of diabetes has been increasing rapidly in recent years. Delayed wound healing has become a common complication in diabetes, which seriously affects the orthobiosis of patients. Exploring and finding the molecular mechanisms of diabetic wound healing and the effective therapies to promote wound healing have important clinical significances. Stem cells transplant has become a research hotspot in accelerating diabetic wound healing. This article reviewed the present approaches concerning stem cells transplant in diabetic wound healing both at domestic and abroad, and looked forward the clinical therapy of stem cells on diabetic wound healing.
Diabetes Mellitus ; therapy ; Humans ; Stem Cell Transplantation ; Stem Cells ; Wound Healing

Objective To discuss the safety of nephron sparing surgery for central renal tumors. Methods Thirty-eight cases of partial nephrectomies for central type renal masses were performed.One hundred and seventeen cases of partial nephrectomies with peripheral type renal tumors were compared. Results For the patients with central renal tumors,mean operative time was 118 minutes.Mean isehemic time was 34 minutes.Mean blood loss was 150 ml.The major postoperative complication included leakage of urine(1 case).For the patients with peripheral based tumors,mean operative time was 95 minutes.Mean ischemic time was 21 minutes(only renal artery clamped)and 17 minutes(complete block).Mean blood loss was 250 ml(only renal artery clamped)and 100 ml(complete block).The major postoperative complication included postoperative bleeding(4 cases). Conclusion According to the standard operative procedure,the nephron sparing surgery for central renal tumors is a safe procedure.

Background and purpose:Correct target positioning is an important factor affecting the precision of stereotactic body radiotherapy (SBRT) in patients with lung tumors. This study investigated the setup errors in patients with malignant lung tumors receiving SBRT with cone-beam CT (CBCT) and analyzed the factors influencing setup errors.Methods:Twenty-nine patients with solitary malignant lung tumors were enrolled in the study. Each patient underwent SBRT with CBCT before each treatment. Setup errors in CBCT were obtained according to the matched and planned CT images in anterior-posterior (AP), superior-inferior (SI) and left-right (LR) directions. The expanding margins of clinical target volume (CTV) to planning target volume (PTV) according to the analyzed setup errors were then calculated. And the influencing factors of setup errors were analyzed.Results:A total of 155 CBCT images from 29 patients were obtained during the treatment. The setup errors were (-1.68±3.62), (-1.34±3.90) and (0.36±2.15) mm in the AP, SI and LR directions, respectively. The absolute setup errors were (3.16±2.42), (3.29±2.48) and (1.74±1.30) mm in the AP, SI and LR directions, respectively. The suggested expanding margins of CTV to PTV were 9.6, 10.0 and 5.3 mm in the AP, SI and LR directions according to the setup errors. The setup errors in the AP direction of peripheral lesions and in the SI direction of inferior, right and metastatic lesions were relatively larger(P=0.007, 0.008, 0.000 and 0.000)..Conclusion:In patients with malignant lung tumors receiving SBRT, the setup errors were more obvious in the SI and AP directions. Tumor motion management techniques including CBCT, breath-holding technique are required to reduce the setup error in patients with lung tumors receiving SBRT.

Aim To develop a modified model of subarachnoid hemorrhage in rats. Motheds The SAH model was induced by injecting autologous blood into the cisterna magna without exposing the occipitoaxial ligament.The main modified point was a hole bored by a dental drill at the middle point of the boundary between the parietal bone and the occipital bone,then a catheter was inserted 8 mm to cisterna magna and the autologous blood was injected . Hemorrheological parameters were measured after the model was created.The intrinsic oversxidase method was used to show the microvessel of CA_1 region. The diameter, density ,and the aera of microvessel were measured and ananlyzed by Image-Pro Plus image analysis system. Results The total blood viscosity(?b) and erythroagglutation index(AL) in SAH model group increased significantly,however,the microvesse area and microvesse density in SAH model group decreased obviously. Conclusion The modified model of subarachnoid hemorrhage in rats is reliable and easy to operate on.

This article describes the development,components and function of the laboratory automation system (LAS) and laboratory information system(LIS). And it also discusses the construction and application laboratory automation,and the operation of the automated laboratory information system.

Purpose To describe the clinical and pathological features of atypical vascular lesions (AVLs) after conservative surgery and radiation of the breast cancer,and to discuss the association with post-radiation angiosarcoma.Methods The clinical and pathological features in one case of AVLs was evaluated.The literatures were reviewed.Results The patient is a 57-yeAR~-old female who underwent a conservative surgery of the right breast because of a carcinoma.She received standard dose of radiation as adjuvant therapy.Three years later, multiple erythematous plaques developed around the former scar, which radiated to the nipple.Clinically,the plaques were considered as relapses of the carcinoma.However, fine needle aspiration gave negative results.Biopsy of one large plague revealed a circumscribed vascular lesion confined to the superficial dermis.It was composed of thin-walled anastomosing lymphatic vessels lined by attenuated endothelial cells.In focal areas, the vessels extended to the mid-dermis.Immunohistochemically, the endothelial cells were positive for CD31, CD34 and D2-40,with absent of α-SMA positive pericytes.Review of the breast tumor sections showed an invasive micropapillary carcinoma.Conclusions AVLs is a rare vascular lesion related with conservative surgery and post-radiation therapy of the breast.AVLs may represent as a precursor of breast angiosarcoma.Being familiar with the clinicopathologic characteristics of AVLs is important not only for the pathologists but also for the clinicians.

AIM:To investigate the effect and the mechanism of Zhibai Dihuang Pill(Radix Rehmanniae praeparata,Fructus Corni,Rhizoma Dioscoreae,Rhizoma Anemarrhenae,Cortex phellodendri Chinensis,etc.) on patients with hyperthyroidism. METHODS: Eighty-five hyperthyroid patients were randomly divided into two groups.The control group(40 cases) were treated with propylthiouracil,while the treatment group(45 cases) were treated with propylthiouracil and Zhibai Dihuang Pill;in the 12-week long treatment period,the heart rate,body weight,thyroid free FT_3、FT_4 and TSH and the serum level of FAA,resistin,adiponectin,leptin of patients in both groups were measured. RESULTS: After treatment,the heart rate,the serum of FT_3,FT_4 decreased and the body weight,TSH increased in both groups(P0.05).(CONCLUSION): Zhibai Dihuang Pill can improve the abnormal metabolism of sugar and fat in patients with hyperthyroidism by its actions on the serum level of FFA,resistin,adiponectin,leptin.

Objective　To explore the role of acute infection of Chlamydia pneumoniae (Cpn) in respiratory diseases. Methods　Microimmunofluorescence test was used to detect IgG antibodies for Cpn in serum obtained from 93 inpatients and PCR was used to test Cpn in detection of Cpn DNA in throat specimens from 55 of the 99 patients. Results　Acute Cpn infection was diagnosed in 35.5% of the respiratory diseases. Antibodies for Cpn (titer of ≥512) were present in 47.6% of the pneumonia group, which may suggest that during 1998 to 1999, Cpn caused an epidemic in Beijing. They were also present in 50% of asthma group, 50.0% of pulmonary heart disease group and 26.3% of lung cancer group. Only five patients (9.1%) were positive by PCR. There exists discrepancy between serological and PCR results. Conclusion　Detection of IgG antibodies for Cpn conduces to diagnosis of acute Cpn infection and give advice for appropriate therapy.