BACKGROUND: Dynamic hip screw (DHS) is a standard internal fixation for intertrochanteric fracture, whereas the patient combined with osteoporosis, cut-out incidence of lag screw is common. The articles in China and abroad indicate bone cement augmentation of DHS to achieve firm fixation. As for normal bone, no reports is published that whether bone cement augmentation is effective.OBJECTIVE: To investigate the biomechanics of DHS with bone cement augmentation for the fixation of intertrochanteric fracture specimen that has a normal bone density.DESIGN, TIME AND SETTING: Bilateral contrast observation study of the same sample was performed in the Laboratory of Biomechanics, Hebei Orthopaedic Research Institute (Shijiazhuang, Hebei Province, China) between March and April In 2005.MATERIALS: Bilateral upper femora from the embalmed male cadaver were provided by Anatomy Department of Hebei Medical University (China). X-ray scan results proved the absence of tuberculosis, anatomical deformity and tumor.METHODS: Twenty-four matched pairs of the upper femora (48 sides) were used to make the specimens of the intertrochanteric fracture of type A2. The right femur specimens were fixed with DHS augmented by bone cement, as the augmentation group (The screw track of femoral neck was expended by curette, and the femoral head facing upwards were injected with 2mL low viscosity bone cement. Then lag screw was wrested to keep the position unchanged till the bone cement coagulated. Placing barrel, compressing through tighten tail screw, and cortical screw fixing side-plate were. followed). And the left femur specimen was fixed with DHS conventional fixation, as the control group. The bending and torsional tests were performed in the two groups.MAIN OUTCOME MEASURES: The maximum load and the maximum torque in the two groupsRESULTS: The maximum load and the maximum torque were (3852.1602±143.6031) N and (15.5+2.6) Nm in the augmentation group, and (3702.9667±133.8601) N and (14.7±3.4) Nm in the control group. There was no significant difference in the biomechanical effects between the two groups (P>0.05).CONCLUSION: The augmenting fixation with bone cement for intertrochanteric fracture specimen has no significant effect on the strength of DHS fixation or on the overall stability of the fractured bone in normal bone density.

Aged ; Antineoplastic Combined Chemotherapy Protocols ; adverse effects ; therapeutic use ; Carcinoma, Squamous Cell ; drug therapy ; radiotherapy ; Cisplatin ; administration & dosage ; adverse effects ; Combined Modality Therapy ; Esophageal Neoplasms ; drug therapy ; radiotherapy ; Esophagitis ; etiology ; Female ; Fluorouracil ; administration & dosage ; adverse effects ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Organoplatinum Compounds ; administration & dosage ; adverse effects ; Radiotherapy, Intensity-Modulated ; adverse effects ; Remission Induction ; Survival Rate ; Taxoids ; administration & dosage ; adverse effects ; Vomiting ; chemically induced

Objective To observe the distribution and the effect of the quantum dots(QDs) on mouse abdominal cavity macrophages.Methods The QDs were co-cultured with mouse abdominal cavity macrophages in vitro.The differentiation and effect of the QDs on macrophage ultrastructures were observed under electronic microscope. Results The QDs were enveloped with unit membrane and internalized in the cytoplasm of the macrophage under transmission electron microscope.And it formed vacuolelike structures in the macrophage.There were many lamellar processes on the surface of the macrophage under scanning electron microscope.Conclusion The QDs can promote macrophage activation,and make its surface projection increased.The QDs were internalized by the macrophage,distributed in the cytoplasm,and formed vacuolelike structures enveloped with unit membrane.

AIM: In order to evaluate the applicable value of LDL as a targeted vehicle for chemotherapeutic agents, we investigated and compared the inhibitory effects of LDL-ACM complex and free ACM on nude mice's subcutaneous implanted tumors derived from gastric cancer cell lines, SGC-7901 and NKM-45. METHODS: LDL-ACM complex was prepared and the tumor model of nude mice was established by subcutaneous implantation of SGC-7901 and NKM-45. Then, the groups of nude mice developed subcutaneous implanted tumors were received either LDL-ACM complex or free ACM. Subsequently, the tumor size, weight and leukemia cell counts were measured and the rates of tumor-inhibition and the survival were compared among the groups. RESULTS: The inhibitory effects of LDL-ACM complex on the tumors, especially on SGC-7901 implanted tumors were much more obvious than that of free ACM. It was also indicated that the action of LDL-ACM complex was mediated by LDL receptor. CONCLUSION: These results showed that LDL-ACM complex had significant inhibitory effects on the implanted tumors and the effect might be mediated by LDL receptor.

OBJECTIVE:To establish a method for the content determination of amygdalin in Lianhua qingwen capsule. METH-ODS:HPLC was performed on the column of Phenomenex Kinetex XB-C18 with mobile phase of acetonitrile-0.2%Phosphoric acid so-lution(6∶94,V/V)at a flow rate of 1.0 ml/min,the detection wavelength was 207 nm,column temperature was 30℃,and the injec-tion volume was 10μl. RESULTS:The linear range of amygdalin was 43.16-215.80 μg/ml(r=0.999 7);the limit of detection was 0.431 6μg/ml,the limit of quantitation was 1.294 8μg/ml;RSDs of precision,stability and reproducibility tests no more than 0.69%;recovery was 95.16%-100.49%(RSD=1.67%,n=9). CONCLUSIONS:The method is simple and rapid with high accuracy and well reproducibility,and can be used for the content determination of amygdalin in Lianhua qingwen capsule.

AIMTo study the chemical constituents of Selaginella tamariscina (Beauv.) Spring.

METHODSVarious chromatographic techniques were used to separate and purify the chemical constituents. Their physico-chemical properties and spectral data were used to elucidate the structures.

RESULTSFour compounds were isolated from the n-BuOH fraction of the water-extracts. Their structures were identified as 1-hydroxy-2-[2-hydroxy-3-methoxy-5-(1-hydroxyethyl)-phenyl]-3-(4-hydroxy-3,5-dimethoxy)-propane-1-O-beta-D-glucopyranoside (tamariscinoside B, I), adenosine (II), guanosine (III), arbutin (IV).

CONCLUSIONTamariscinoside B (I) is a new compound, while the others were isolated from Selaginella for the first time.

Adenosine ; chemistry ; isolation & purification ; Arbutin ; chemistry ; isolation & purification ; Glucosides ; chemistry ; isolation & purification ; Guanosine ; chemistry ; isolation & purification ; Molecular Conformation ; Molecular Structure ; Plants, Medicinal ; chemistry ; Selaginellaceae ; chemistry

AIMTo study the chemical constituents of Selaginella tamariscina (Beauv.) Spring.

METHODSThe compounds were isolated and purified by macroporous adsorption resin, Sephadex LH-20 and silica gel column chromatography and identified on the basis of their physicochemical and spectral data.

RESULTSFour compounds were obtained from the n-BuOH fraction of 70% acetone extracts. Their structures were elucidated as (7S, 8R)-7, 8-dihydro-7-(4-hydroxy-3,5-dimethoxyphenyl)-8-hydroxymethyl-[1'-( 7'-hydroxyethyl)-5' methoxyl] benzofuran-4-O-beta-D-glucopyranoside (tamariscinoside C, I), D-mannitol (II), tyrosine (II), shikimic acid (IV).

CONCLUSIONCompound I is a new compound, compounds II and III were obtained from the genius for the first time, compound IV was yielded from the plant for the first time.

Benzofurans ; chemistry ; isolation & purification ; Mannitol ; chemistry ; isolation & purification ; Molecular Conformation ; Molecular Structure ; Monosaccharides ; chemistry ; isolation & purification ; Plants, Medicinal ; chemistry ; Selaginellaceae ; chemistry ; Shikimic Acid ; chemistry ; isolation & purification ; Tyrosine ; chemistry ; isolation & purification

Carcinoma in Situ ; epidemiology ; etiology ; pathology ; Carcinoma, Squamous Cell ; pathology ; surgery ; Disease Progression ; Female ; Humans ; Lichen Sclerosus et Atrophicus ; epidemiology ; etiology ; pathology ; Prevalence ; Vulvar Neoplasms ; epidemiology ; etiology ; pathology

OBJECTIVETo observe the differential effect of joint ultrasound on the syndrome differentiation of rheumatoid arthritis (RA) by observing the high frequency ultrasound performances among inactive stage and different syndromes in active stage.

METHODSTotally 83 RA patients in the active stage were assigned to the dampness heat syndrome group (DHS, 59 cases)and the cold dampness syndrome group (CDS, 24 cases) according to Chinese medicine (CM) syndrome typing. Besides, 20 RA patients in the remission stage were recruited as the control group (abbreviated as the remission group). By using high frequency ultrasound and power Doppler ultrasound technology, a comparative observation of synovitis, tenosynovitis, synovial blood flow, and bone erosion in the 2nd-5th metacarpophalangeal (MCP) joints, proximal interphalangeal (PIP) joints, wrist joints, knee joints, the second and the fifth metatarsophalangeal (MTP) joints (a total of 24 joints) was performed in all patients. Correlation analyses were performed between the ultrasound performance, laboratory indices, and the disease activity. Ultrasound data of each RA patient were analyzed by their total scores. Χ2 test was used for enumeration data. The measurement data was expressed as x ± s. One-way ANOVA was used for data of normal distribution, while non- parametric test was used for data of non-normal distribution. Correlation analysis of two variables was performed for clinical indicators and ultrasound indicators. Its significance was detected using Pearson correlation.

RESULTSCompared with the remission group, the severity degree of synovitis, tenosynovitis, synovial blood flow, and bone erosion significantly increased in the DHS group (P < 0.01). There was statistical difference in ESR, CRP, anti-CCP, DAS28 score, and the positive rate of RF (P < 0.05, P < 0.01). There was statistical difference in the severity degree of synovitis and synovial blood flow, and DAS28 score in the CDS group (P < 0.05). Compared with the CDS group, there was statistical difference in the four ultrasound indices (P < 0.05, P < 0.01), ESR, CRP, anti-CCP, DAS28 score, and the positive rate of RF in the DHS group (P < 0.05, P < 0.01). There was no statistical difference in G, IgG, IgA, or IgM among the three groups (P > 0.05). There existed positive correlation between ESR and the synovitis degree, synovial blood flow, and bone erosion in the DHS group (r = 0.444, 0.397, 0.486, P < 0.05).There existed positive correlation between ESR and the synovitis degree, bone erosion, and synovial blood flow in the DHS group (r = 0.378, 0.270, P < 0.05). There existed positive correlation between the DAS28 score and the synovitis degree and synovial blood flow in the DHS group (r = 0.304, 0.351, P < 0.05).

CONCLUSIONSThe inflammation degree was the most severe in RA patients of DHS. High frequency ultrasound could provide better evidence for Chinese medical syndrome differentiation of RA patients.

Arthritis, Rheumatoid ; diagnostic imaging ; Humans ; Medicine, Chinese Traditional ; Metacarpophalangeal Joint ; ultrastructure ; Syndrome ; Synovitis ; diagnostic imaging ; Ultrasonography

OBJECTIVETo compare clinical outcomes of superior labrum from anterior to posterior (SLAP) repair and biceps tenodesis in treating type I SLAP injury.

METHODSFrom March 2009 to March 2012, 38 patients with type II SLAP injury were treated with SLAP repair and biceps tenodesis, and all patients were unilateral SLAP injury. Sixteen patients treated with biceps tenodesis included 8 males and 7 females with an average age of (49.3±3.7) years old (ranged, 45 to 54); 10 cases were on the left side and 6 cases on the right side; 10 cases were caused by falling down, 2 cases were caused by throwing damage and 4 cases were caused by daily life damage; the time from injury to operation were from 3 to 8 weeks. Twenty-two patients treated with SLAP repair included 14 males and 8 females with an average age of (49.0±2.8) years old (ranged, 44 to 56); 13 cases were on the left side and 9 cases were on the right side; 14 cases were caused by falling down, 5 cases were caused by throwing damage and 3 cases were caused by daily life damage; the time from injury to operation were from 3 to 7 weeks. Preoperative, postoperative at 6 months, 1 year and 2 years' UCLA and SST score were compared between two groups.

RESULTSThere was no significant differences in UCLA and SST score between two groups before operation. At 6 months after operation, UCLA and SST score in biceps tenodesis group was higher than SLAP group, and action,range of anteflexion, strength of anteflexion, degree of satisfaction in biceps tenodesis group was higher than SLAP group. There was no significant meaning in SST and UCLA score between two groups at 1 and 2 years after operation.

CONCLUSIONShort-term efficacy of biceps tenodesis for SLAP injury is better than SLAP repair, but long-term efficacy is fairly.

Aged ; Case-Control Studies ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Shoulder Joint ; injuries ; surgery ; Tendon Injuries ; surgery ; Tenodesis