A novel method was developed for the direct analysis of testosterone, androstenedione, methyltestosterone and methenolone in serum samples by fully automated online turbulent flow solid phase extraction coupled with high performance liquid chromatography-tandem mass spectrometry. An aliquot of 50 μL serum sample was preconcentrated directly on a Turboflow SPE column after centrifugation. Turboflow SPE C18-P could be used to remove serum matrix effectively. The optimum loading flow rate and elution time were 4. 0 mL/min and 1. 0 min, respectively. The linearity ranges were from 1. 0 μg/L to 100. 0 μg/L for four target compounds. The method limits of detection ( LODs) were in the range of 0. 2-0. 3 μg/L. The relative standard deviations (RSDs) ranged from 2. 9% to 14. 1% (n=5). The time for one sample analysis including extraction, separation and determination was 32 min. The proposed method has been successfully applied for the analysis of serum samples.

0.05).Chlorpyrifos increased the activity of CYP1A1 in lungs,CYP2B1 in kidneys and lungs.Cypermethrin increased activity of CYP1A1 in livers,kidneys and lungs,CYP2B1 in livers and lungs,CYP3A in livers.These increases were statistically significant (P

Objective: To study the effects of capsaicin applied locally to infraorbital nerve on primary afferent nerve inadult rats. Methods:Capsaicin solution (2% ) was directly applied onto one lateral intraorbital nerve, and the contralateralnerve was used as self-control. Both experimental and control infraorbita1 nerves were observed under electron tnicroscope on3, 7, 14, 21, 28, 35 or 42 d after local administration. Substance P(SP)--like immunoreactive positive granules in both lateralnucleus caudalis spinalis nervi trigemini (CNV) were examined by immunohistochemical method. Results: Degenerated un-myelinated fibers in capsaicin-treated nerves were found under electron microscope, and no myelinated fibers changes werefound. The gray scale value of SP-like immunoreactive positive granules in the experimental side was markedly lower thanthat in the control side (P＜0. 01), while no significant difference was observed between different time groups. Conclusion:Local administration of capsaicin can produce selective destruction of unmyelinated fibers in primary afferent nerves, and canreduce the levels of SP in regions of CNV. The results suggest that local administration of capsaicin has potential therapeuticvalue for trigeminal neuralgia.

AIM and METHOD: In terms of difference value between bleeding blood volume that caused hemorrhagic shouk (HS) and residual blood volume at 2 h after HS, showed that HS at 5.3 kPa level was compen- satory and at 4.0 kPa level was decompensatory. Comparing some blood changes between HS two levels and their changes while pretreated with captopril (Capt. ) to reduce the release of angiotensin Ⅱ (Ang-Ⅱ), so as to inveshgate the significance of Ang - Ⅱ during HS. RESULTS: The residual blood volume in 4.0 kPa HS + Capt. group are again from near "zero" value in simple 4.0 kPa HS group. In both two HS level groups found blood dilution and was not influenced by pretreating with Capt.; contents of K+ and aldosterone increased, but Na+ had no changes, in Capt. + HS group, the former two contents reduced and Na+ had no changes comparing with each HS group. In two HS groups, the bind lactate, lactic dehydrogenase (LDH), blood urea nitrogen (BUN) increased and had more increment in 4.0 kPa HS group. All these changes could be prevented by pretreating with Capt. The blood glucose in 5.3 kPa HS group increased markedly and Capt. had no influence on it, but decreased extremely in 4.0 kPa HS group and Capt. could make it re - increased. CONCLUSIONS: Artery blood pressure (ABP) at 5 .3 kPa level was compensatory HS and ABP at 4 .0 kPa level was decompensatory HS, some changes on decompensatory HS were more serious and severe than compensatory HS, Capt. has protective effects on some changes during HS and could prolong the survival time of decompensatory HS, all that indicated the increment of Aug - Ⅱ is an important pathogenetic factor during HS.

Idiopathic pulmonary fibrosis(IPF), with unknown pathogeny, is an interstitial lung disease.The pathological features are diffuse epithelial-cell lesion, fibroblast proliferation, myofibroblast differentiation and excessive extracellular matrix deposition.CXCR4 is the predominant chemokine receptor on fibrocytes;CXCL12 is the only ligand of CXCR4.A large number of studies have shown that CXCL12/CXCR4 biological axis plays an important role in the pathogenesis of idiopathic pulmonary fibrosis.Under the regulation of hypoxia, HIF-1α and PI3K-Akt-mTOR path, CXCL12/CXCR4 biological axis promotes lung fibroblast proliferation, myofibroblast differentiation and extracellular matrix deposition, resulting in development and progression of IPF.

BACKGROUND: Nano-hydroxyapatite has been widely used as reconstructive and prosthetic material for osseous tissue, owing to its excellent biocompatibility and bioactivity. But, its brittleness is one of the most serious obstacles for its wider applications as load-bearing implants. Therefore, hydroxyapatite/chitosan composites have been widely studied as bone substitute, due to their excellent biocompatibUity and suitable mechanical properties.OBJECTIVE: To review various preparation methods of hydroxya patite/chitosan composites and the development trend in this field.METHODS: Articles were searched in Medline Database (1995-01/2009-03), VIP Database (1995-01/2009-03) and "qinghuatongfang" Database (1995-01/2009-03) with the keywords of "nano-hydroxyapatite, chitosan, preparation, development trend".RESULTS AND CONCLUSION: Total 2 034 related articles were collected, including 1 634 in Chinese and 670 in English. Following excluding earilier published, duplicate, and similar studies, we brought into 37 sub-standard literatures. Hydroxyapatite/chitosan composite in nanometer size, with similar structure as natural bone, has better biological function compared with corresponding micrometer composite. Simultaneously, optimized material composition, structure and technology will obtain more suitable bone substitute in mechanical property compared with natural bone. This paper reviews preparation methods at home and abroad in recent years, with the rapid development of biological materials, hydroxyapatite compositematerials have been wisely used in bone tissue repair and replacement surgery, but its poor mechanical properties limits its clinical application.

Aim To study the inhibitory effects and its mechanisms of oridonin on human pancreas adenocarcinoma SW1990 cells.Methods Cell growth inhibition mediated by oridonin on SW1990cells was measured by MTT assay.The morphological changes were observed by Hoechst33258 fluorochrome staining and electron microscope.Cell cycle and apoptosis rate were analyzed by flow cytometry. The molecular mechanisms involved in the effects of oridonin on SW1990 cells were studied by RT-PCR.Results The growth of humen pancreas adenocarcinoma SW1990 cells was significantly inhibited by oridonin.Apoptosis morphological changes about chromatic agglutination and nuclear condensation were detected by Hoechst 33258 fluorochrome staining and electron microscope in oridonin treated SW1990 cells."Sub-G_1" phase peak and G_2/M growth arrest werer found with flow cytometry.The upregulating mRNA expression of p21 and downregulating mRNA expression of survivin were detected by RT-PCR.Conclusion The inhibitory effect of oridonin on human pancreas adenocarcinoma SW1990 cells through induced apoptosis and G_2/M growth arrest and the mechanisms may be through surviving-p21 co-regluation pathway.

Adolescent ; Adult ; Allyl Compounds ; poisoning ; Chronic Disease ; Female ; Humans ; Occupational Diseases ; diagnosis ; therapy ; Poisoning ; diagnosis ; therapy

Objective To explore the effect of amifostine combined with low-dose cyclosporine in treatment of refractory immune thrombocytopenia effect and related mechanisms.Methods 60 cases of refractory immune thrombocytopenia patients using parallel randomized controlled groups, divided into three groups, 20 cases in each group, amifostine group were treated with amifostine, cyclosporine group were treated with cyclosporine, amifostine+CSA group received amifostine+cyclosporine A treatment.The platelet count, platelet membrane glycoprotein antibody, lymphocyte subsets and bone marrow megakaryocyte count were observed and compared.Results After different treatment of three, six months, the level of platelet count of patients in three groups were compared with the group before treatment were significantly increased, and the treatment of platelet count level of amifostine group and cyclosporine group were significantly lower than that of amifostine +CSA group, the difference was statistically significant (P<0.05), there was no significant difference between amifostine group and cyclosporine group.The total efficacy of amifostine+CSA group was significantly higher than the other two groups, the difference was statistically significant ( P<0.05 ) , there was no significant difference between amifostine group and cyclosporine group.After the treatment, the platelet membrane glycoprotein GPIIb/IIIa antibody levels in three groups were significantly increased, and ring the detection level of amifostine+CSA group after treatment was significantly higher than the other two groups, the difference was statistically significant (P<0.05), there was no significant difference between amifostine group and cyclosporine group.After treatment, the three groups of CD4 +, CD4 +/CD25 +and CD4 +/CD8 +levels were significantly increased, CD8 +decreased significantly, the difference was statistically significant (P<0.05).And the level of change after treatment with amifostine +cyclosporine group was significantly higher than that of the other two groups, the difference was statistically significant (P<0.05), there was no significant difference between amifostine group and cyclosporine group.After treatment, the number of bone marrow megakaryocytes in the three groups was significantly lower than that before treatment , the level of count after treatment with amifostine +cyclosporine was significantly lower than that of the other two groups, the difference was statistically significant (P<0.05).there was no significant difference between amifostine group and cyclosporine group.The adverse reactions of amifostine group and amifostine+CSA group were significantly lower than that in cyclosporine group, the difference was statistically significant (P<0.05).there was no significant difference between amifostine group and amifostine+CSA group.Conclusion Amifostine combined with low dose of cyclosporine in treatment of refractory immune thrombocytopenia can play a synergistic effect, improve the therapeutic effect, and effectively reduce the dosage and adverse reactions.

Objective:To introduce a new style of platysma myocutaneous flap and to evaluate its application value in the restoration of oral-maxiofacial defects.Methods:Platysma myocutaneous flap with apron incision was used for the restoration of oral-maxiofacial defects after oral lesion ablation in 15 cases from January,2014 to September,2015.The platysma muocutaneous flap was harvested with a U shaped apron incision.The skin above the flap pedicle was preserved.The platysma pedicle was widened to ensure the flap survival.All the patients were followed up form 4 to 33 months.Results:Of the 15 platysma myocutaneous flaps,12 survived completely and 3 had partial flap necrosis.The total survival rate of the flaps at the recipient site of buccal mucosa,tongue and alveolar was 8/9,1/3 and 3/3 respectively.Additionally,there were 2 cases of disturbed wound healing in the neck.Except for 1 case of carcinoma of gingiva which had apparent cervical scar and 1 case of tongue carcinoma which had limited tongue mobility,the other cases showed a satisfactory recovery of oral-maxillofacial contour and fucnction.Conclusion:Compared with the traditional platysma myocutaneous flap,the platysma myocutaneous flap with apron incision can provide a larger skin paddle,and is suitable for the restoration of small and medium sized buccal mucosa and alveloar defects,but not for tongue defect.