1.Hypoxic preconditioning: effect, mechanism and clinical implication (Part 1).
Chinese Journal of Applied Physiology 2014;30(6):489-501
Hypoxic preconditioning (HPC) refers to exposure of organisms, systems, organs, tissues or cells to moderate hypoxia/ischemia that is able to result in a resistance to subsequent severe hypoxia/ischemia in tissues and cells. The effects exerted by HPC are well documented. The original local in situ (LiHPC) is now broadened to remote ectopic organs-tissues (ReHPC) and extended crossly to cross pluripotential HPC(CpHPC) induced by a variety of stresses other than hypoxia/ischemia, including cancer, for example. We developed a unique animal model of repetitive autohypoxia in adult mice, and studied systematically on the effects and mechanisms of HPC on the model in our laboratory since the early 1960s. The tolerances to hypoxia and protection from injury increased significantly in this model. The adult mice behave like hypoxia-intolerant mammalian newborns and hypoxia-tolerant adult animals during their exposure to repetitive autohypoxia. The overall energy supply and demand decreased, the microorganization of the brain maintained and the spacial learning and memory ability improved but not impaired, the detrimental neurochemicals such as free radicals down-regulated and the beneficial neurochemicals such as adenosine(ADO) and antihypoxic gene(s)/factor(s) (AHGs/AHFs) up-regulated. Accordingly, we hypothesize that mechanisms for the tolerance/protective effects of HPC are fundamentally depending on energy saving and brain plasticity in particular. It is thought that these two major mechanisms are triggered by exposure to hypoxia/ischemia via oxygen sensing-transduction pathways and HIF-1 initiation cascades. We suggest that HPC is an intrinsic mechanism developed in biological evolution and is a novel potential strategy for fighting against hypoxia-ischemia and other stresses. Motivation of endogenous antihypoxic potential, activation of oxygen sensing--signal transduction systems and supplement of exogenous antihypoxic substances as well as development of HPC appliances and HPC medicines such as AHFs are encouraged based on our basic research on HPC. HPC may result in therapeutic augmentation of the endogenous cytoprotection in hypoxic-ischemic or suffering from other diseases' patients. Evolutionary consideration of HPC and clinical implications of HPC are both discussed to guide future research. The product of AHF is expected to be one of the most effective first aid medicines to rescue patients in critical condition. HPC is beginning to be used in surgery and is expected to be developed into a feasible adaptive medicine in the near future.
Animals
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Brain
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physiology
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Disease Models, Animal
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Hypoxia, Brain
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physiopathology
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Hypoxia-Inducible Factor 1
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Ischemic Preconditioning
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Mice
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Signal Transduction
2.Changes of psychological state and family relationship in process of treatment for depression and anxiety
Journal of Shanghai Jiaotong University(Medical Science) 2006;0(02):-
Objective To investigate the changes of psychological state and family environment of the patients with neurosis (including depression and anxiety) in the process of treatment. Methods The Hamilton depression scale (HAMD), Hamilton anxiety scale(HAMA), self-rating depression scale(SDS), self-rating anxiety scale(SAS), family environment scale(FES), and family adaptability and cohesion scale(FACESⅡ-CV) were used to evaluate the changes of psychological state and family relationship in the process of treatment among patients with depression and anxiety hospitalized in general hospitals (n=45) and their family members (n=45). Results Before intervention, values of HAMD, HAMA, SDS and SAS in patients were higher than normal ones, and were in line with the corresponding diagnostic criteria. After psychological intervention and medication for 2 to 3 months, symptoms such as depression and anxiety were improved significantly, and values of the above scales were within normal ranges. Besides, there was also significant improvement in FES and FACESⅡ-CV after intervention among the patients. All the values of the family members were in the normal ranges before intervention, however, significantly positive changes were observed after intervention. Conclusion With the improvement in depression and anxiety after intervention among patients, the psychological pressure of family members is released, and family relationship is partially restored. The rehabilitation of patients plays an important role in the restoration of family function.
3.Relation between atrial septal motion and atrial load using omni-directional M-mode echocardiography
Wei GUO ; Lihong LU ; Bin CHEN
Chinese Journal of Ultrasonography 2003;0(09):-
Objective To study the relation between changed atrial load and atrial septal motion.Methods Forty one patients with valve diseases,7 patients with congenital heart diseases, and 12 normal subjects were involved.Two dimensional image was obtained by transesophageal echocardiography.The thickness,wave time and velocity were showed during atrial septal motion by omni directional M mode echocardiography (OME).Results With increase of the volume load and pressure load in the atrium,the atrial septal thickness increased, and the velocity of atrial septal motion increased or reduced.Conclusions OME shows that the thickness and velocity of atrial septal motion relates with condition of atrial load.
4.Culture of Donor Cells in Extracranial Pituitary Implantation
Journal of Chinese Physician 2001;0(08):-
Objective To culture human pituitary adenoma cells to provide some useful experimental foundations to practice pituitary adenoma cells as donor cells in the extracranial implantation. Methods Human pituitary adenoma cells obtained by operation were cultured in vitro, and their growth state was dynamically observed. Immunohistochemical staining and RIA were used to evaluate their functional status. Results The cultured pituitary adenoma cells still had secretory function in vitro. 6 cases of GH adenoma cells secreted a large amount of GH, 5 cases of PRL adenoma cells secreted a large amount of PRL, and 3 cases of pituitary adenoma cells without function could also secrete a small quantity of FSH, LH and PRL. Conclusion 14 cases of cultured human pituitary adenoma cells had secretory function in vitro, which provides the useful experimental data to perform extracranial implantation with pituitary adenoma cells as donor cells.
5.Content Determination of Compound Ofloxacin Ear Drops by HPLC Simultaneously
Wei LU ; Hua GUO ; Fantao ZENG
China Pharmacy 2001;0(10):-
OBJECTIVE:To develop a HPLC method for simultaneous determinatio n of ofloxacin and dexamethasone ac?etate in compound ofloxacin ear drops.METHODS:The analysis was carried on a XDB-C 8 ,the mobile phase was composed of methanol-potassium dihydrogen phosphate(0.02mol/L)by gradient elution,the flow rate was1.0ml/min,the column tem?perature was30℃and the detection wavelength was at240nm.RESULTS:The detectable concentrations of ofloxacin and dexamethasone acetate showed good linear correlation in the ranges of100~500?g/ml and10~30?g/ml respectively,the av?erage recoveries of ofloxacin and dexamethasone acetate were100.6%(RSD=0.46%,n=9)and101.3%(RSD=0.72%,n=9)respectively.CONCLUSION:The method is accurate and reproducible and can be used for determination of ofloxacin and dexamethasone acetate in compound ofloxacin ear drops.
6.Research progress and application of the aortic taper angle
Weihang LU ; Wei GUO ; Xin JIA
International Journal of Surgery 2016;43(12):840-843
Endovascular repair has gained worldwide popularity for the treatment of aortic dissection and aortic aneurysm.The non-tapered stents are selected usually.The aortic diameters vary in different level.High incidence of distal stent-induced complications is closely related to the aortic taper angle.According to several published studies,the aortic taper angle could be evaluated by establishing geometric model.Applications of tapered stents can significantly reducing the incidence of distal stent-induced comnplications.This review summaries the latest researches in the studies of the progress and the application of the aortic taper angle and the tapered stents,providing a reference for endovascular stent-graft selecting in the treatment of aortic dissection and aortic aneurysm.
7.Effects and optimum concentration of Rhizoma Chuanxiong on osteoblasts in vitro
Chinese Journal of Tissue Engineering Research 2016;20(37):5483-5488
BACKGROUND:It has been proved that Rhizoma Chuanxiong can promote osteoblast proliferation and differentiation.
OBJECTIVE:To further observe the effects of tetramethylpyrazine (Ligustrazine) extracted from Rhizoma Chuanxiong on osteoblast proliferation and type I col agen expression.
METHODS:Mouse osteoblast cel line MC3T3-E1 was cultured in medium containing 1, 5, 10, 15 and 20 mg/L Ligustrazine, respectively. Osteoblast proliferation was detected by cel counting kit-8 assay, and alkaline phosphatase activity and type I col agen level measured using ELISA method.
RESULTS AND CONCLUSION:Different concentrations of Ligustrazine al significantly promoted the osteoblast proliferation and type I col agen level compared with the blank control group (P<0.005). The activity of alkaline phosphatase in al Ligustrazine groups except 15 and 20 mg/L groups was significantly higher than that in the blank control group (P<0.005). These results show that Ligustrazine isolated from Rhizoma Chuanxiong can effectively promote the osteoblast proliferation and type I col agen expression, with the optimum concentration of 10 mg/L.
8.Clinical Application of Portable Auto-haemostat Machine on Limbs
Mingxian GUO ; Wei LU ; Yan CUI
Chinese Medical Equipment Journal 1989;0(04):-
Objective To prove the clinical effect of portable auto-haemostat machine on body's limbs. Methods Portable auto-haemostat machine was applied to the indicated patients in their clinical aid treatments course, i.e. the rapid hemostasis on limbs. Results The hemostasis was rapid and accurate with hemostatic pressure in the range from 190 to 230 mmHg. The excellent effect guarantees the diagnosis, observation, bandaging and secure transmission of victims until they were sent to the operation room. Conclusion It is reliable to use portable auto-haemostat machine on body's limbs in clinic works.
9.Expermental study of Pioglitazone on treating vascular dementia
Minxia GUO ; Ting WEI ; Lu GAO
Journal of Clinical Neurology 1997;0(06):-
Objective To investigate the effects of peroxisome proliferator-activated receptor-? (PPAR?) agonist Pioglitazone on treating the vascular dementia (VD) model.Methods SD rats were randomly divided into the sham-operated group,VD group,Pioglitazone high-dose group [20 mg/(kg?d)] and low-dose group [5 mg/(kg?d)].The VD models were made by modified Pulsinelli four-vessel occlusion method,and each group received corresponding treatment for 7 d.Then,Morris water maze test was applied to examine the place navigation escape latency.The number of PPAR? positive neurons and expression of PPAR? in the cerebral tissue were detected by immunohistochemistry.Results Compared to the VD group,the place navigation escape latencies in the two Pioglitazone treated groups were significantly shorter(all P
10.Clinical application of Cheatham-Platinum covered stent in treatment of aortic coarctation
Chinese Journal of Postgraduates of Medicine 2012;(32):18-21
Objective To evaluate the clinical safety and efficacy of Cheatham-Platinum(CP)covered stent in treatment of aortic coarctation.Methods The therapeutic efficacy was retrospectively analyzed in 15 patients with aortic coarctation who were treated by BIB balloon dilation and CP covered stent implantation.Results All patients were well recovered,the stent did not appear displaced,folded,aorta dissection and rupture.The pressure difference was 5-10 mm Hg(1 mm Hg=0.133 kPa)between proximal part and distal end after operation.Following up(20±12)months,the therapy efficacy of all the patients was stable and there was no fracture,removal,aortic stenosis or dysarteriotony.Heart ultrasounds demonstrated good close of the cases with patent ductus arteriosus.Conclusion CP covered stent is a safe and available clinical therapy,featured by minimum aorta injuries.