OBJECTIVETo study the effect of Astragali Radix on the denervated tibial muscle atrophy in rats, and discuss its mechanism.

METHODTotally 60 SPF-grade Sprague-Dawley rats were selected in the common peroneal nerve crush model, and then randomly divided into 6 groups: Astragali Radix high-dose, medium-dose, low-dose groups, the Mecobalamin group, the model group, and the sham operation group. They were administered with drugs after the operation. At 18 d, the pathological section staining and morphological analysis were performed. The wet-weight ratio and section area of tibial muscles were also measured. The real-time fluorescence quantification was adopted to detect the differential expression between Angptl4 and PI3K genes.

RESULT(1) Wet-weight ratio: The wet-weight ratio in Astragali Radix high-dose, medium-dose groups was much higher than that in the model group (P < 0.05 or P < 0.01). (2) Section area: The sham operation group was higher, with regular morphology; Whereas the model group showed significant decrease, with chaotic structure and obvious connective tissue proliferation; Astragali Radix groups and the mecobalamin group showed relatively small section areas, with chaotic structure and unobvious connective tissue proliferation. Compared with the model group, Astragali Radix groups showed significant increase (P < 0.01). (3) Motor end plate: The sham operation group was in uniform brownish black color and oval or round shape; Astragali Radix medium-dose and high-dose group and the mecobalamin group showed rough line edges; Astragali Radix medium-dose and low-dose groups and the model group showed decline in the number, with irregular morphology, rough line edges and a light color. (4) Angptl4 and PI3K: Compared with the model group, the Astragali Radix high-dose group showed significant increase (P < 0.05).

CONCLUSIONAstragali Radix has a significant effect in preventing and treating denervated tibial muscle atrophy. It may delay the muscle atrophy by increasing Angptl4 and PI3K gene expressions.

Angiopoietin-like 4 Protein ; Angiopoietins ; genetics ; Animals ; Astragalus Plant ; Astragalus membranaceus ; chemistry ; Dose-Response Relationship, Drug ; Drugs, Chinese Herbal ; pharmacology ; therapeutic use ; Gene Expression Regulation ; drug effects ; Male ; Muscular Atrophy ; drug therapy ; genetics ; pathology ; prevention & control ; Phosphatidylinositol 3-Kinases ; genetics ; Rats ; Rats, Sprague-Dawley ; Tibia

Objective To study the efficacy of complement depletion with CVF in preventing a-cute rejection after heart allotransplantation in inbred strain rats. Methods Inbred male Lewis rats were used as recipients and Brown-Norway rats as donors, and the heterotopic heart transplantation model was established. The allografts were divided into 2 groups (n=8 in each group). After infusing low-dose CVF 20?g/kg to the CVF-treated group, cardiac allograft survival time was observed on 4 rats of each group. The remaining 4 rats in each group were killed respectively at day 1,3,5 and 6, the pathological grade for acute rejection, the complement activity in serum, the deposition of C3 on tissue, and the extent of infiltration by CD3+ T cells were compared. Results The mean survival time of heart allograft was (11. 69?0. 72) days and (6. 65?0. 35) days in CVF-treated group and control group respectively (P

Objective To summarize the experiences of ultrasonic liposuction in 204 cases, and to analyze the advantages and disadvantages of this technique. Methods The ultrasonic system (SILBERGEE E.U.A. TM ) and the liposuction equipment (HEROULES TM , American) were applied with the tumescent technique in 204 cases. Results Satisfactory rate was 90.69 %. After operation the highest sucked fat quantity was 6 800 ml, and the fewest quantity 250 ml, with an average of 1 907.6 ml for each case. Average volume of sucked fat in each position was 1 005.5 ml, which exceeded that by the traditional method. Advantages of this technique were larger fat quantity, obvious effect, less bleeding and pain, and safety. Disadvantages and complications were rough and uneven surface, accumulation of the liquid, bilateral asymmetry, slow wound healing, subcutaneous ecchymosis and hardening nodule, and even decreased blood pressure. The corresponding processing technique was recommended after liposuction. Conclusion This method is a simple and convenient, safe and reliable technique. It is suggested that multiple times and less portions of liposuction may be of benefit to patients.

Objeact:To study the stress distribution of angled dowe l crown in anterior maxillary teeth. Method:A 3-dimensio nal finite element model (3-DFEM) of a maxillary central incisor with a dowel, a core and the supporting tissues was established.The stress in various angled d owel designs with a 150 N force applied along the long axis of the crown in a v ertical load on the incisal edge was mesured on the 3-DFEM and analyzed with AN SYS sorft ware.Results:The maximum stress was found in la bical cervical zone of the cortical bone around the teeth,the compressive stress in labical and tensile stress in palatal respectively. Conclusion: In anterior maxilla with angled dowel crown maximum stress is in the cervical zone of cortical bone,and the magnitude of stress increases with the i ncreace of the angulation of dowel crown.

Chinese herbal nature combination (CHNC) is the particular combination of nature, taste and channel tropism, which can be used to express the effect of Chinese herbal medicine in the clinical application concisely. The complex system model for the relationship between CHNC and viscera was constructed in this paper based on the thinking model of viscera theory. The model is able to reveal the functional features of CHNC. The model will promote research on the relationship between CHNC and viscera and provide new ideas for clinical applications of CHNC.

Objective To investigate clinical and pathological characteristics of acquired digital fibrokeratoma (ADF).Methods Clinical data were collected from 12 patients with ADF,and their clinical manifestations,histopathological features,treatment and prognosis were analyzed retrospectively.Results The mean age at onset of ADF was 39.75 ± 17.69 years (range,17-64.5 years),and the average disease duration was 4.83 ± 5.77 years (range,0.5-20 years).The ratio of male to female was 1.4:1.Most skin.lesions were polymorphic,and mainly involved fingers,toes and nail grooves.Sometimes non-extremity sites are also involved.Histopathological examination of skin lesions showed epidermal hyperkeratosis,acanthosis and broadened dendroid rete ridges.The dermis consisted of mature collagen bundles,fibroblasts and a large number of dilated capillaries.The characteristic manifestation was that most collagen bundles were vertical to the epidermis.Conclusions ADF,a rare benign fibrous tumor with unknown etiology,usually occurs in adults as a solitary lesion on fingers or toes,sometimes in non-extremity sites.Surgery and laser therapy are common treatments for ADF with low recurrence rate.

Objective To investigate whether N-methyl-D-aspartate(NMDA) signal pathway is involved in platelet-activating factor(PAF)-induced apoptosis in neurons.Methods Mice cortex neurons were treated by PAF in different dose for 24 hours or pretreated by a PAF receptor antagonist BN52021, an NMDA receptor antagonist MK801 and a nitric oxide synthase(NOS) inhibitor L-NAME for 30 min. Then the neurons were stained by propidium iodide(PI)/calcein AM and the images were taken by a digital camera on a fluorescent microscope. Neuron death ratio(%) was calculated. In the mean time, neuron NOS(nNOS) expression of the cells was detected by Western Blot method, as well as nNOS activity was measured by 3H radioimmunoassay.Results (1)Neuronal death increased after neurons were treated with 0.01, 0.1, 0.3 and 0.6 ?mol/L PAF 24 h. There were signifitantly changed in 0.3 ?mol/L and 0.6?mol/L comparing control. (2)PAF-induced neurotoxicity was prevented not only by BN5021, but also by MK-801 or L-NAME. (3)PAF enhanced nNOS expression and activity in neurons.Conclusion NMDA signal pathway is involved in platelet-activating factor-induced neurotoxicity.

Objective To study whether neuronal injury induced by platelet activating factor (PAF) was involved in NMDA /PSD 93 signaling pathway.Methods Primary cortex neurons culture were from wild type and PSD 93 knockout mice.Then the neurons were pretreated with 0.3 ?mol/L PAF for 24 hours, 5 ?mol/L BN52021, 10 ?mol/L MK-801, or 60 ?mol/L L-NAMA, respectively. The cells were stained with PI/Calcein for apoptosis detection. Varied protein expressions were also observed in the neurons by western blot. Proteins colocalized on neuraxon were detected by cell immunochemistry and confocol microscopy, and cGMP activity was measured by radioimmunoassay.Results (1) PSD 95, NR2A, and nNos except PSD 93 expressed in the cortex neurons from PSD 93 knockout mice. (2) PSD 93, NR2A and nNos colocalized on neurite. (3) Neurotoxicity and cGMP avtivity induced by PAF decreased in PSD 93 knockout cortex neurons.Conclusion NMDA/PSD 93 signaling pathway is involved in neuronal injury induced by PAF.

The severity of ischemic brain injury was closely associated with the mortality and disability of stroke. How to limit ischemic brain injm-y to the greatest extent and promote the recovery of neurological function is one of the most concerned hotspots at present in the field of neuroscience. A large number of studies have shown that a variety of factors involve in the pathological process of ischemic brain injury, in which, the role of T lymphocyte-mediated immune inflammatory response in ischemic brain injury has received increasing attention. This article mainly reviews the role of T cells in ischemic brain injury.