Basic Research Progress and Thinking of Acupuncture Treatment for Primary Dysmenorrhea / 世界科学技术-中医药现代化

The mechanism of acupuncture in treating primary dysmenorrhea(PD)in rats was reviewed.The research on the mechanism of acupuncture in the treatment of PD involves endocrine,nervous,immune,metabolic and other aspects.However,the basic research did not actively pay attention to the clinical problems encountered in the treatment of PD by acupuncture and moxibustion,including the rule of point selection and the correlation mechanism between acupoints and uterus in the treatment of PD by acupuncture and moxibustion,the key technical parameters of the treatment of PD by acupuncture and moxibustion and the rule of the action of acupuncture and moxibustion.The basic research of acupuncture treatment of primary dysmenorrhea should pay attention to translational medicine.

Current situation and existing problems of acupuncture for primary hypertension / 中国针灸

<p><b>OBJECTIVE</b>To analyze the present situation and existing problems of acupuncture for primary hypertension (PH) based on clinical research literature in recent 20 years.</p><p><b>METHODS</b>The clinical research literature regarding acupuncture for PH were searched from China National Knowledge Infrastructure (CNKI), VIP data network (VIP) and database from 1997 through 2016; a total of 218 papers met the inclusive criteria. Microsoft Excel and Apriori algorithm of SPSS Clementine software were applied to analyze the data.</p><p><b>RESULTS</b>The main acupoints of acupuncture for PH were Taichong (LR 3), Quchi (LI 11), Zusanli (ST 36) and Hegu (LI 4), but its support degree was only 12.21%. 127 papers were randomized controlled trials, accounting for 58.26%. 158 papers had clear diagnostic criteria, accounting for 72.48%. 138 papers had clear efficacy evaluation criteria, accounting for 63.30%. Only 5.05% of the papers were classified as high-quality literature by using Jadad scale.</p><p><b>CONCLUSION</b>In recent 20 years, some rules existed in acupoint selection for PH, but the support degree was low so it could not accurately guide clinical treatment. Although the clinical literature quality of acupuncture for PH was gradually increasing, the proportion of high-quality literature was low, therefore modern medical research model and foreign similar research should be followed to design a more rigorous trial protocol. As a result, the quality of clinical research is increased to provide reference for future clinical treatment.</p>

Addition of an alginate to a modified zeolite improves hemostatic performance in a swine model of lethal groin injury.

BACKGROUND: QuikClot is a zeolite-based hemostatic agent that can control severe hemorrhage through adsorption of water in an exothermic reaction. Ion exchanging the calcium ions in zeolite type 5A with cations of a reduced hydration enthalpy can reduce heat generation, but its effect on the hemostatic efficacy is not clear. We developed a new compound zeolite hemostat and tested it against controls in a modified swine model of battlefield injury. METHODS: A modified complex groin injury was created in 42 swine (39.4 +/- 2.6 kg). This included semitransection of the proximal thigh (level of inguinal ligament) and semidivision of the femoral artery and vein. After 3 minutes, the animals were assigned to (1) no dressing (ND), (2) standard dressing (SD), (3) SD + zeolite hemostat (QC), (4) SD + chemically modified zeolite hemostat, where calcium was substituted with silver (Ag) and zinc (Zn) simultaneously, (Ag.Zn-zeolite), and (5) SD+ the compound hemostat composed of Ag.Zn-zeolite and alginate. Resuscitation was started 15 minutes after application of dressing (500 mL of 6% hetastarch during 30 minutes). Survival for 180 minutes was the primary endpoint for this study. Blood loss, wound temperatures, and histologic tissue damage were recorded as well. In addition, the antibacterial activities of these hemostatic agents were tested on agar plates. At the end of experiment, the strength of clots was carefully measured by a Tablet Hardness Analyzer. RESULTS: Mortality in the group treated with the application of the compound hemostat composed of Ag.Zn-zeolite and alginate was 10% versus 100% in the ND group and 71% in the SD group (p < 0.001 vs. ND group, p < 0.05 vs. SD group). The QC group had a mortality rate of 22%, whereas application of Ag- and Zn-substituted zeolite associated with a mortality rate of 37.5%. Ag and Zn substitution of zeolite reduced the in vivo temperature peak to 39.8 degrees C +/- 2.3 degrees C and no thermal injury of tissue was noted in these groups. Ag- and Zn-substituted zeolite posed an antibacterial ability against Pseudomonas aeruginosa, Staphylococcus aureus, and Escherichia coli. Addition of an alginate into the modified zeolite hemostat reinforced the strength of clots to 18.52 N +/- 1.33 N. CONCLUSIONS: Application of the compound zeolite hemostat can effectively control hemorrhage and dramatically reduce mortality from a lethal groin wound. In addition to its antibacterial properties, Ag- and Zn-substituted zeolite hemostat can decrease the exothermic reaction and greatly attenuate the heat-induced tissue injury.

Differentiation of the pericyte in wound healing: The precursor, the process, and the role of the vascular endothelial cell.

Pericytes play a crucial role in the homeostasis and maturation of newly formed vessels, but their precursor and the process of their differentiation remain unclear. In this study, we show that in vivo, pericytes in human granulation tissue taken from burn patients expressed CD13 and collagen I, which are cell markers of peripheral blood fibrocytes (PBFCs). Mouse PBFCs, ex vivo labeled by PKH-26 and administered intravenously back to mice, formed lumens in the granulation tissue and expressed pericyte marker NG2. Furthermore, in cell culture, human PBFCs in co-culture with human umbilical vascular endothelial cells or human dermal microvascular endothelial cells (HDMECs) expressed pericyte markers desmin and myosin heavy chain of smooth muscle cell, and some migrated to the membrane of human umbilical vascular endothelial cells or HDMECs to form PBFC/vascular endothelial cell clusters, or formed round PBFC only clusters with their nuclei aligned along a circle. The formation of PBFC/vascular endothelial cell clusters and round PBFC clusters were inhibited by an antibody against monocyte chemotactic protein-1. PBFCs cultured with homogenate of granulation tissue also expressed desmin and myosin heavy chain of smooth muscle cell. Our findings support that the PBFC is a precursor of pericytes, the differentiation of PBFCs is induced by vascular endothelial cells in a paracrine fashion.

The effect of microencapsulated NGF-expressing NIH-3T3 cells on bioengineered dermis function in vitro / 生物医学工程学杂志

Nerve growth factor (NGF) can promote the regeneration of peripheral nerve as well as contraction and reepithelization of wound. We constructed a bioengineered dermis containing microencapsulated NGF-expressing NIH-3T3 cells and study the effect of the microencapsule to the bioengineered dermis and seed cells. NGF gene was transfected into NIH-3T3 cells and enclosed into alginate-poly-L-lysine-alginate (APA) microencapsulation and cultivated in vitro. Content of NGF in microencapsules culturing supernatant was measured by enzyme linked immunosorbent assay (ELISA) method. These microencapsules were co-cultured with epidermic cells and fibroblast cells. Bioengineered dermis was constructed with NGF-expressing micorencapsules as seed cells using tissue engineering method. NIH-3T3 microencapsules, empty microencapsules, normal culture media were control groups. After one week culture, the characteristics of the dermis were described by MTT test, the content of hydroxyproline (HP), HE staining and ultrastructure photograph. We found the NGF-expressing microencapsulates can secret NGF steadly after cultured 8w in vitro, promot the proliferation of epidermic cells and secret collagen of fibroblast cells. These functions can maintaine in bioengineered dermis. So NGF-expressing NIH-3T3 microencapsulates can promote the quality of bioengineered dermis.

Effect of Transplanting Encapsulated Cells Transfected with Nerve Growth Factor Gene on Peripheral Nerve Regeneration Following Nerve Injury / 中国康复理论与实践

@#ObjectiveTo investigate the effect of microencapsules cells transfected with nerve growth factor (NGF) gene to the sciatic nerve regeneration following sciatic nerve injury in rats.MethodsMicroencapsules containing cells transfected with NGF gene were prepared using drop generative technique and cells were cultured in vitro. Animal model of sciatic nerve cut and sutured was established with Sprague-Dawely rats, and ninety-six animals were randomly divided into group A (in vivo implantation of microencapsules cells transfected with NGF gene), group B (in vivo implantation of microencapsule), group C (in vivo implantation of cells transfected with NGF gene), and group D (negative control group). The nerve conductive velocity (NCV), nerve action potential (NAP), sciatic nerve function index (SFI) were detected in the 4th, 8th and 12th week postimplantation.ResultsThe microencapsules cells transfected with NGF gene in microencapsules retained reliable cell viability and function. The expanded cells formed cell aggregates, with confocal laser scanning microscopy (CLSM), exhibited green fluorescence material in the cell. The NGF concentration in supernatant were arriving at 269 pg/ml when cultured for 10 days. The results of NCV, NAP and SFI tests in group A were higher than those in the other groups (P<0.05).ConclusionAfter implantation, microencapsules cells transfected with NGF gene may secrete NGF continuously in vivo, and has significant improvement effect on nerve regeneration following sciatic nerve injury.

Granule tissue remodeling under neoepithelium in pig's full thickness dermal wounds / 中华创伤杂志

Objective To observe the granule tissue remodeling under neoepithelium in minitype pigs' full thickness dermal wounds and discuss the relation between the remodeling and possible ulcers or scars. Methods After the establishment of eight full-thickness dermal wound models with the diameter of 4 cm on the back of six minitype pigs, the specimens were collected from wound edge and wound center immediately, 3, 6, 9, 12, 15, 20, 25, 30 and 45 days, respectively after injury for HE staining, immunohistochemical staining and Van Gieson staining and then observed under light microscope to count the cell number, fibroblasts and vascular endothelial cells as well as evaluate the quantity and arrangement of collagens. Results The mean wound healing time was (29.3?1.8) days. After 9-25 days, the granule tissues in the wound center contained more cells, fibroblasts, collagen and vascular endothelial cells than those under neoepithelium of wound edge (P 0.01). Meanwhile, the collagen quantity and arrangement style of granule tissues under neoepithelium during wounds healing (12-30 days) assembled those under neoepithelium 15 days after wound healing. Conclusion Granule tissue remodeling exists during the healing of full thickness dermal wound.

Repair of peripheral nerve defects using acellular allogeneic nerve grafting combined with exogenous basic fibroblast growth factor / 中华创伤杂志

Objective To evaluate the long term effect of acellular allogeneic nerve grafting combined with exogenous basic fibroblast growth factor (bFGF) in peripheral nerve repair. Methods Sixteen big-ear Japanese rabbits were divided into experimental and control groups randomly. In the experimental group, 3 cm-long acellular allogeneic nerves from New Zealand rabbit were used to bridge the rabbit tibial nerve defects; and 1 ml bFGF solution was given from the second day once daily for 2 weeks and twice a week for another 6 weeks after surgery. In the control group, normal saline solution was given. Morphological and functional results were evaluated 20 weeks after the nerve repair. Results The recovery rates of the evoked potential and the nerve conduction velocity in the experimental group were 67.59%?29.63% and 59.79%?21.11%, respectively, significantly higher than that (49.07%? 15.74% and 36.85%?18.69% respectively) in the control group (P

Experimental study of microencapsulated nerve cell/tissue for transplantation / 中国康复理论与实践

@#ObjectiveTo investigate the feasibility of poly l lysne to preparation microencapsules for cell transplantation therapies.MethodsUsing drop generative technique preparation Alginate poly l lysne Alginate (APA) microencapsules containing nerve cell/tissue. The concentration of nerve growth factor in supernatant was detected by two antibody sandwich method of enzyme linked immunosorbent assay.ResultsThe nerve cell/tissue in microencapsules retain reliable cell viability and function. Conclusions The APA is proved with reliable biocompatibility and strength,would work as an immunoisolation tools to exert important function in nerve renovate.

The effect of vacuum-assisted drainage on granulation tissue formation of infected soft tissue explosive injury in pig / 解放军医学杂志

Objective To observe the effect of vacuum-assisted drainage (VAC) technique on the granulation tissue formation of infected soft tissue explosive injury in pig. Methods 16 wounds produced by explosion with electric detonators,which were fixed on the skin of the shoulders and hips of 4 small white pigs. The wounds were divided into 2 groups randomly: in group A the wounds were treated with conventional method,and in group B the wounds were treated with VAC set with a pressure of -15kPa. All wounds were infected on the third day after explosion. The depth of wounds was measured,and specimens were talcen from wound bed,immediately before treatment,and 1,3,6,9,14,19,and 24 days after treatment. The specimens were bistopathologieally studied with HE staining to assess the wound healing process of the two groups. Furthermore,immunohistochemistry for Factor Ⅷ related antigen and Ki67 was done to estimate the number of vascular endothelial cells and proliferating cells. Results From 1 to 19 days after the treatment,the depth of the wounds in group B were shallower than those of group A ( P

A study on the functions of the regenerated axons in end-to-side neurorrhaphy / 中华显微外科杂志

ObjectiveTo probe the possibility of functional sensory endings regeneration after end-to-side neurorrhaphy. MethodsFifteen New Zealand rabbits were used in this study. The left greater auricular nerve served as the donor nerve. A nerve graft taken from the right ear served as the receptive nerve which anastomosed to the donor nerve with the other end implanting into the denervated skin flap. Normal skin and denervated skin flap without nerve implantation served as control groups 5 animals in each group. The single nerve fibre recording technique was used to investigate the number,distribution and types of regenerated discharging nerve fibers 4 months after operation. ResultsThe inductive discharges of nerve fibres wave observed in all types of regenerated sensory nerves ,the total discharging fibers was about 58% of that in normal skin. Few discharging fibers were observed in denervated skin flap without nerve implantation. Conclusion End-to-ide neurorrhaphy can regenerate functional axons.

A study on the functions of the regenerated axons in end-to-side neurorrhaphy / 中华显微外科杂志

Objective To probe the possibility of functional sensory endings regeneration after end to side neurorrhaphy Methods Fifteen New Zealand rabbits were used in this study The left greater auricular nerve served as the donor nerve A nerve graft taken from the right ear served as the receptive nerve which anastomosed to the donor nerve with the other end implanting into the denervated skin flap Normal skin and denervated skin flap without nerve implantation served as control groups 5 animals in each group The single nerve fibre recording technique was used to investigate the number,distribution and types of regenerated discharging nerve fibers 4 months after operation Results The inductive discharges of nerve fibres wave observed in all types of regenerated sensory nerves,the total discharging fibers was about 58% of that in normal skin Few discharging fibers were observed in denervated skin flap without nerve implantation Conclusion End to ide neurorrhaphy can regenerate functional axons

Acceleraton of nerve regeneration following acellular allogeneic nerve grafting by bFGF / 中华显微外科杂志

Objective To evaluate the promoting effect by bFGF on nerve regeneration following acellular allogeneic nerve grafting,and the effects of various concentration of bFGF on axon growth. Methods The animals were divided into 1 000U/ml, 500U/ml, 250U/ml,100U/ml and normal saline groups. Immunohistochemistry staining of neurofilament-160 and S-100 was used to show the length of axonal growth and Schwann cell infiltration 10 days after the surgery. Results The average distance of regenerated nerve fibers in the high dose groups (1 000U/ml and 500U/ml) was longer than that in the normal saline control group;but there was no difference between the low dose groups (250U/ml and 100U/ml) and the control group. Conclusion Early use of bFGF when acellular allogeneic nerve grafted to bridge peripheral nerve defect may obviously promote axon growth speed.

The study of biocompatibility of polyurethane sponges made in China / 医疗卫生装备

Objective To evaluate the biocompatibility of four kinds of polyurethane sponges made in China. Methods According to ASTM Standards for Medical Devices of America, polyurethane sponges are used to perform such biological tests as cytotoxicity test, acute toxicity test, pyrogenic reactions test, stimulation test of conjunctiva and cornea, sensitization test. The data are analyzed and evaluated according to the criterion. Results Reaction scales of these polyurethane sponges in cytotoxicity are 0 or 1 level. No toxicity effects and pyrogenic reactions are observed in vivo test. No conjunctiva and cornea irritation reactions and no sensitization reactions are found. Conclusions The four kinds of polyurethane sponges have high biocompatibility and can become ideal dressings of Vacuum-Assisted Closure.

Biocmpatibility research of a hemostatic agent-ZSM-5 zeolite / 医疗卫生装备

Objective To evaluate the biocompatibility of ZSM-5 zeolite and provide an experimental basis for developing the first-aid hemostatic agent.Methods According to Chinese evaluation standards on medical devices and biological tests,the cytotoxicity in vitro,hemolysis test,acute toxicity of system,pyrogen test,intracutaneous stimulation,sensitization and micronucleus test were studied in ZSM-5 zeolite.In order to find out the side-effect of the zeolite granules' remains left in the wounds to body,muscle implantation test was studied.Results There were no obvious cytotoxity,hemolysis reaction.Acute tocicity,pyrogen reaction,intraeutaneous stimulation,sensitization and potential mutagenesis in themicronucleus test were observed.Their results were a11 consistent with the Chinese biological evaluation of medical devices.Obvious inflammatory reaction was observed when ZSM-5 zeolite was implanted in muscle for 12 weeks.Conclusion The ZSM-5 zeo1ite has reliable biocompatibility.But zeolite can cause inflammatory reaction when it is remained in the wound surface for long term.

Effect of negative pressure on the rate of skin donor site re-epithelialization in pig model / 西安交通大学学报(医学版)

Objective To test the effect of negative pressure on the rate of skin donor site re-epithelialization in pig model.Methods Five pigs were selected for this study,and two split-thickness skin graft defects were harvested from the back of each animal.Half of the donor sites were treated with 120 mmHg negative pressure as the experimental group for 10 days and half were treated with vaseline gauze as the control.Changes in each wound were assessed every two days.Results The rate of re-epithelialization increased significantly.The donor sites healed after 4 to 6 days of negative pressure treatment, 2 to 4 days earlier than the control group.The level of inflammatory reaction occurring in wounds treated with negative pressure appeared less severe than that in wounds treated with vaseline gauze.Negative pressure could facilitate cell proliferation.The ratios of S,G2 and M phase increased significantly,and higher expression of PCNA was observed and detected in hair hollicle epithelium,regenerative basal cells and glandular epithelium on day 4 and 8 after negative pressure treatment.Conclusion Negative pressure could significantly increase the rate of skin donor site re-epithelialization