More and more studies have shown that NOD-like receptor protein 3 (NLRP3) inflammasome has become the regulatory factor of inflammatory response and protective immunity, and the assembly and activation of NLRP3 inflammasomes are closely related to the anti-tumor immunity effect. Depending on the cell type and stimuli, activation of the NLRP3 inflammasome can induce immune cells to become polarized, hyperactive, or pyroptotic, releasing interleukin (IL)-1β and IL-18, which leads to cascade immune or inflammatory responses, and its role in tumor immunity has received extensive attention. Here, we review the mechanisms of the NLRP3 inflammasome enhancing CD8⁺ T cells-mediated anti-tumor immunity by inducing the pyroptosis of tumor cell, the pyroptosis or hyperactive state of dendritic cells (DCs), and the pyroptosis or polarization of the macrophages. Different anti-tumor immune roles of NLRP3 inflammasome activation in tumor cells and immune cells provide new directions for future research and may influence the development of next-generation immunotherapy.

BACKGROUND: There are plentful studies about bioreactor of tissue engineering of blood vessel, tendon, cartilage, heart valve,trachea, bladder and stern cell. OBJECTIVE: To construct small-sized tissue-engineerad blood vessels with human bone marrow stromal stem cells (hBMSCs) in improved bioreactor system.DESIGN, TIME AND SETTING: The single sample observation stuay was performed at the School of Mechanical and Power Engineering, East China University of Science&Technology, and Shanghai Tissue Engineering Research & Development Center from June 2005 to March 2008.MATERIALS: Vessel bioreactor was self-made by East China University of Science&Technology. hBMSCs were harvested from healthy volunteers. METHODS: A set of support bracket constructing tissue engineered blood vessels with the diameter of 2 mm was designed with the application of Finite Element Methods as an analysis method analyzing support bracket of tissue engineered small-sized blood vessel. Primary hBMSCs were first Collected and further cultivated exvivo. The third passage cultured cells were then seeded on the polyglycolic acid (PGA) to fabricate the cell-scaffold composite. Subsequently, this composite was subjected to dynamical culture in the blood vessel bioreactor. After cultured for 4 weeks, the composite was removed from the bioreactor.MAIN OUTCOME MEASURES: The following mentioned references were measured: composite growth; other correlation detection of the hBMSCs-PGA composite, RESULTS: Gross observation and scanning electron microscope were used at4 weeks after hBMSCs-PGA composite culture. It was observed that the tissue-engineered blood vessel had a bright color and certain elasticity. The blood vessel could rebound to its odginal shape after repeated press by the forceps.The secreted collagen matrix arrayed orderly around the cells and smooth muscle elastic acttn could also be detected in the formed tissues using immunohistochemistry. CONCLUSION: The in vivo mechanics conditions of blood vessels can be simulated using the current blood vessel bioreactor system. Using hBMSCs, the construction of tissue engineered small-sized blood vessels can be successfully achieved.

Objective The influencing parameters of solid and fluid computing fields for the scaffolds models with regular square holes were discussed by nonlinear fluid-solid-coupling approaches.The numerical computational resuits of which the models were regarded as both rigid body and non-linear elasticity were compared as well.Method One direct fluid-solid-coupling approach and two indirect fluid-solid-coupling approaches were adopted,and the calculating reliability of three kinds of fluid-solid coupling methods was verified.Rasults The solid-fluidcoupling computational results are obtained in light of 12 kinds of scaffolds models which are constructed by 3 groups of square side length(50,100 and 150 μm)and 4 groups of porosity(61%,65%,77%and 84%).The field parameters of those solid models including stress,strain and displacement and those fluid models including static pressure,velocity,wall shear stress and strain rate are achieved and compared.Conclusion There appear some difference between the results of porous scaffold models as a rigid body and as non-linear elasticity.The different porosity with the same pore radius or the different pore radius with the same porosity would affect the field parameters of solid models and fluid models in varying degrees.

Objective The influencing parameters of solid and fluid computing fields for the scaffolds models with regular square holes were discussed by nonlinear fluid-solid-coupling approaches.The numerical computational resuits of which the models were regarded as both rigid body and non-linear elasticity were compared as well.Method One direct fluid-solid-coupling approach and two indirect fluid-solid-coupling approaches were adopted,and the calculating reliability of three kinds of fluid-solid coupling methods was verified.Rasults The solid-fluidcoupling computational results are obtained in light of 12 kinds of scaffolds models which are constructed by 3 groups of square side length(50,100 and 150 μm)and 4 groups of porosity(61%,65%,77%and 84%).The field parameters of those solid models including stress,strain and displacement and those fluid models including static pressure,velocity,wall shear stress and strain rate are achieved and compared.Conclusion There appear some difference between the results of porous scaffold models as a rigid body and as non-linear elasticity.The different porosity with the same pore radius or the different pore radius with the same porosity would affect the field parameters of solid models and fluid models in varying degrees.

Objective To study the effects of nitric oxide synthase(NOS) and nitric oxide(NO) in post-asphyxial renal injury in neonatal rats.Methods Forty-eight Wistar neonatal rats were randomly divided into 4 groups:controls,2 h,24 h and 48 h post-asphyxia groups (12 in each group).The rats were decapitated in different times(2 h,24 h and 48 h) after asphyxia for 30 minutes.The renals were dissected to determined the concentrations of NO and NOS.And the scores of renal tubules were measured under light microscope.Results Compared with control group,the levels of NO and NOS significantly increased at 2 h and 24 h after asphyxia.The scores of renal tubules were significant difference at 24 h and 48 h after asphyxia compared to controls.Conclusion These findings suggest NOS and NO may play an important role in the development of post-asphyxia renal injury.

BACKGROUNDL-glutamate (L-GLU) is a major neurotransmitter in the nucleus ambiguus (NA), which can modulate respiration, arterial pressure, heart rate, etc. This study investigated the effects and mechanisms of L-GLU microinjected into NA on gastric motility in rats.

METHODSA latex balloon connected with a pressure transducer was inserted into the pylorus through the forestomach for continuous recording of the gastric motility. The total amplitude, total duration, and motility index of gastric contraction waves within 5 minutes before microinjection and after microinjection were measured.

RESULTSL-GLU (5 nmol, 10 nmol and 20 nmol in 50 nl normal saline (PS) respectively) microinjected into the right NA significantly inhibited gastric motility, while microinjection of physiological saline at the same position and the same volume did not change the gastric motility. The inhibitory effect was blocked by D-2-amino-5-phophonovalerate (D-AP5, 5 nmol, in 50 nl PS), the specific N-methyl-D-aspartic acid (NMDA) receptor antagonist, but was not influenced by 6-cyaon-7-nitroquinoxaline-2,3-(1H,4H)-dione (CNQX) (5 nmol, in 50 nl PS), the non-NMDA ionotropic receptor antagonist. Bilateral subdiaphragmatic vagotomy abolished the inhibitory effect by microinjection of L-GLU into NA.

CONCLUSIONSMicroinjection of L-GLU into NA inhibits the gastric motility through specific NMDA receptor activity, not non-NMDA receptor activity, and the efferent pathway is the vagal nerves.

2-Amino-5-phosphonovalerate ; pharmacology ; 6-Cyano-7-nitroquinoxaline-2,3-dione ; pharmacology ; Animals ; Gastrointestinal Motility ; drug effects ; Glutamic Acid ; administration & dosage ; pharmacology ; Male ; Medulla Oblongata ; drug effects ; metabolism ; Rats ; Rats, Wistar ; Receptors, N-Methyl-D-Aspartate ; antagonists & inhibitors ; Vagotomy

Objective:By applying moxibustion to the eight confluent points in different periods of time,to observe the changes in thermal pain threshold latency of acupoints based on Fei Teng Ba Fa.Methods:A total of 468 healthy college student volunteers received moxibustion at the eight confluent points in three different periods of time,i.e.Chen (7:00-9:00),Wu (11:00-13:00) and Xu (19:00-21:00).The thermal pain threshold latency was adopted to measure the changes in pain threshold of the eight confluent points under different conditions (different periods of time,different genders,different acupoints and different states of the acupoints) based on Fei Teng Ba Fa.Results:Finally,thirty subjects dropped out and 438 subjects were included.The comparison of thermal pain threshold latencies of the eight confluent points in the same opening or closing state based on Fei Teng Ba Fa:latencies of the closing points and adjunct points were significantly different in different periods of time (P＜0.05);the latencies of the males were significantly longer than those of the females (P＜0.05);there was no significant difference in the latency between the left and right sides (P＞0.05);in the female group,there was a significant difference in the latency between the lower-limb points and the upper-limb points (P＜0.05).The comparison of thermal point threshold latencies of the eight confluent points in different opening or closing state:in the period of Wu (11:00-13:00),the latencies of the opening points were significantly longer than those of the closing points and adjunct points (P＜0.05);for men,their opening and closing points had significantly longer thermal pain threshold latencies than their adjunct points (P＜0.05);despite the gender,the latencies of the upper limb opening and closing points were significantly longer than the latency of the adjunct points (P＜0.05);in the female group,the latencies of the lower-limb opening points were significantly shorter than those of the lower-limb closing and adjunct points (P＜0.05).Conclusion:Based on Fei Teng Ba Fa,the pain thresholds of the eight confluent points vary in different periods of time,gender,acupoint location and opening/closing state,which can be taken as the evidence of making time-based acupuncture-moxibustion prescriptions.

Based on the wavelet transform, the ways and process of wavelet de-noising are presented in the paper. The detail experimental results show that wavelet de-noising is better than traditional filtering ways, and the soft-threshold denoising is obviously better than the hard- threshold denoising.
Algorithms ; Artifacts ; Electrocardiography ; methods ; Humans ; Signal Processing, Computer-Assisted ; Wavelet Analysis

Adult ; Diagnosis, Differential ; Follow-Up Studies ; Humans ; Knee Joint ; Male ; Mucin-1 ; metabolism ; Neurilemmoma ; metabolism ; pathology ; surgery ; S100 Proteins ; metabolism ; Sarcoma, Synovial ; metabolism ; pathology ; Sweat Glands

Objective To examine the expression of TLR7/8 in monocytes purified from HIV-1 infected individuals and to study its association with disease progression. Methods Sixty-three HIV-1 infected individuals and 18 normal controls were enrolled. Monocytes were purified by MACS system and RNA of them was extracted by RNA mini kit of QIAGEN company. TLR7/8 expression was tested by real-time RT-PCR with ABI7500. Results It was found that the expression of TLR7 was strongly correlated with absolute CD4 count (r =0.614, P＜0.01) , so was TLR8 (r =0.419, P＜0.01). The expression of TLR7 in slow progressor (SP) group was higher than that in HIV-1 infected patients group, AIDS patients group and normal group (P ＜ 0. 05 ) . HIV group and normal group were strongly higher than AIDS group (P ＜ 0. 05). It was no significant differentiation of expression of TLR7 between HIV infection group and normal control group. The expression of TLR8 in SP group and normal group were significantly higher than that in AIDS group (P ＜ 0. 05). The expression of TLR8 was no singnificantly difference between SP group and HIV group or normal control group, so was it between HIV group or normal control group and AIDS group. Conclusion The expression of TLR7/8 in monocytes from HIV-1 infected patients significantly correlated with disease progression.