Objective We have examined tumor suppressor gene p53 from N- methyl - N- nitrosourea (MNU ) induced the col - orectal tumors in rats. Methods PCR, SSCP and DNA sequence analysis. Results In colorectal tumors induced by MNU, the mobil- ity shifts of p53 gene mutation were observed, p53 gene mutation was a deletion at third position C of codon 244 in exon7. Conclu- sion The present study suggested that MNU induces rat p53 mutations in the colorectal tumors.

Objective To evaluate radical gastrectomy combined with cholecystectomy for gastric cancer patients with concomitant gallbladder disease.Methods Clinical data of 702 gastric cancer patients undergoing radical gastrectomy (614 patients) only or combined with cholecystectomy during radical gastrectomy from October 2009 to September 2014 in our department was retrospectively analyzed.Results The operating time of patients with simultaneous cholecystectomy was(348 ± 111)min.the operating time of patients with radical gastrectomy only was (274 ± 89) min (t =3.812,P ＜ 0.05).Perioperative and postoperative complications,hospitalization expenses and 5-year survival rates were not statistically significant (P ＞ 0.05).Conclusions Radical gastrectomy with cholecystectomy for gastric cancer with gallbladder disease patients is safe and feasible.

Objective As China′s technological development and social progress,China′s enterprises have begun to produce cochlear implant which has high risk in installation and application.While,currently there is not yet the corresponding state or industry level standards,nor is the international conversion demonstrate standard.The evidence of safety and effectiveness submitted by companies vary widely,and they are quite different from the existing requirements of the technical review.This article aims to do preliminary study on safety and efficacy evaluation in order to establish national and industrial standards to objectively evaluate the cochlear implant safety and efficacy.Methods Systematic analysis of the foreign history and status of safety and efficacy evaluation of cochlear implant were performed,with the indication of the current problems in safety and efficacy evaluation and the reference standard of similar products.Results The systemic recommendations of the safety and efficacy standards of cochlear implant system werw provided.Conclusion From the perspective of medical device regulation,it is imperative and possible to develop the reasonable and scientific safety and effectiveness evaluation for cochlear implant with the effort of experts,enterprises and users.

In view of the public academic papers of Professor LIU Zhicheng, his academic track is analyzed, including validating effect, exploring mechanism, improving efficacy, expanding disease variety, deepening mechanism, optimizing program and seeking breakthrough. On this basis, combined with the self-character of TCM, the potential path for the academic cultivation of young scholars is refined: focusing on clinical practice, confirming clinical efficacy, deepening mechanism exploration, improving clinical therapeutic effect, optimizing clinical program, extending clinical disease spectrum, inheriting, seeking, breaking through, innovating, expecting and topping over. It is believed that during the academic cultivation, the importance is to form the stable research direction and continuity, organize research team, absorb actively new knowledge and thoughts, and adopt multidisciplinary cross and coordination so as to achieve the greater success ultimately.
Acupuncture ; education ; history ; Acupuncture Therapy ; history ; China ; History, 20th Century ; History, 21st Century ; Humans ; Male ; Publications ; Teaching ; history

Objective To investigate the clinical value of Physiologic Ability and Surgical Stress ( E?PASS) and modified Estimation of Physiologic Ability and Surgical Stress ( mE?PASS) scoring systems in predicting the mortality and surgical risk of gastric cancer patients, and to analyze the relationship between the parameters of E?PASS and early postoperative complications. Methods Clinical data of 778 gastric cancer patients who underwent elective surgical resection in Tianjin Medical University General Hospital from Jan. 2010 to Jan. 2014 were analyzed retrospectively. E?PASS and mE?PASS scoring systems were used to predict the mortality of gastric cancer patients, respectively. Univariate and unconditioned logistic regression analyses were performed to assess the relationships between nine parameters of E?PASS system and early postoperative complications. Results E?PASS and mE?PASS systems were used to predict the mortality in the death group and non?death group. The Z value was -5. 067 and -4. 492, respectively, showing a significant difference between the two groups (P<0.05). AUCs of mortality predicted by E?PASS and mE?PASS were 0.926 and 0.878 (P>0.05), and the prediction calibration of postoperative mortality showed statistically non?significant difference (P>0.05) between the E?PASS and mE?PASS prediction and actual mortality. Univariate analysis showed that age, operation time, severe heart disease, severe lung disease, diabetes mellitus, physical state index and ASA classification score are related to postoperative complications
( P<0. 05 for all ) . Unconditioned logistic regression analysis showed that severe lung disease, diabetes mellitus, ASA classification score and operation time are risk factors for early postoperative complications ( P<0.05 for all) . Conclusions Both mE?PASS and E?PASS scoring system have good consistency in the predicting postoperative mortality and actual mortality, and both are suitable for clinical application. Moreover, the mE?PASS scoring system is clinically more simple and convenient than E?PASS scoring system. Preoperative severe lung disease, diabetes mellitus, ASA classification score and operation time are independent factors affecting the early postoperative complications.

Cardiovascular diseases (CVDs) are the most common cardiovascular system disorders. Cellular senescence is a key mechanism associated with dysfunction of aged vascular endothelium. Hyaluronic acid and proteoglycan link protein 1 (HAPLN1) has been known to non-covalently link hyaluronic acid (HA) and proteoglycans (PGs), and forms and stabilizes HAPLN1-containing aggregates as a major component of extracellular matrix. Our previous study showed that serum levels of HAPLN1 decrease with aging. Here, we found that the HAPLN1 gene expression was reduced in senescent human umbilical vein endothelial cells (HUVECs). Moreover, a recombinant human HAPLN1 (rhHAPLN1) decreased the activity of senescence-associated β-gal and inhibited the production of senescence-associated secretory phenotypes, including IL-1β, CCL2, and IL-6. rhHAPLN1 also downregulated IL-17A levels, which is known to play a key role in vascular endothelial senescence. In addition, rhHAPLN1 protected senescent HUVECs from oxidative stress by reducing cellular reactive oxygen species levels, thus promoting the function and survival of HUVECs and leading to cellular proliferation, migration, and angiogenesis. We also found that rhHAPLN1 not only increases the sirtuin 1 (SIRT1) levels, but also reduces the cellular senescence markers levels, such as p53, p21, and p16. Taken together, our data indicate that rhHAPLN1 delays or inhibits the endothelial senescence induced by various aging factors, such as replicative, IL-17A, and oxidative stress-induced senescence, thus suggesting that rhHAPLN1 may be a promising therapeutic for CVD and atherosclerosis.

Objective To investigate the clinical value of Physiologic Ability and Surgical Stress ( E?PASS) and modified Estimation of Physiologic Ability and Surgical Stress ( mE?PASS) scoring systems in predicting the mortality and surgical risk of gastric cancer patients, and to analyze the relationship between the parameters of E?PASS and early postoperative complications. Methods Clinical data of 778 gastric cancer patients who underwent elective surgical resection in Tianjin Medical University General Hospital from Jan. 2010 to Jan. 2014 were analyzed retrospectively. E?PASS and mE?PASS scoring systems were used to predict the mortality of gastric cancer patients, respectively. Univariate and unconditioned logistic regression analyses were performed to assess the relationships between nine parameters of E?PASS system and early postoperative complications. Results E?PASS and mE?PASS systems were used to predict the mortality in the death group and non?death group. The Z value was -5. 067 and -4. 492, respectively, showing a significant difference between the two groups (P<0.05). AUCs of mortality predicted by E?PASS and mE?PASS were 0.926 and 0.878 (P>0.05), and the prediction calibration of postoperative mortality showed statistically non?significant difference (P>0.05) between the E?PASS and mE?PASS prediction and actual mortality. Univariate analysis showed that age, operation time, severe heart disease, severe lung disease, diabetes mellitus, physical state index and ASA classification score are related to postoperative complications
( P<0. 05 for all ) . Unconditioned logistic regression analysis showed that severe lung disease, diabetes mellitus, ASA classification score and operation time are risk factors for early postoperative complications ( P<0.05 for all) . Conclusions Both mE?PASS and E?PASS scoring system have good consistency in the predicting postoperative mortality and actual mortality, and both are suitable for clinical application. Moreover, the mE?PASS scoring system is clinically more simple and convenient than E?PASS scoring system. Preoperative severe lung disease, diabetes mellitus, ASA classification score and operation time are independent factors affecting the early postoperative complications.

Objective To investigate the spatio-temporal characteristics of normal gastric electrical activity.Methods From January 1st to February 29th,2016,fasting gastric electric slow wave signal was collected by high resolution mapping (HRM) under anesthesia before operation in patients without gastric lesions but needed laparoscopic surgery.Parameters of slow wave signal activity was calculated,gastric activity map and velocities was drawn and then spatio-temporal characteristics of gastric electrical activity of different part of the stomach were obtained.Independent sample t test was performed for comparison of two groups and one-way analysis of variance was used for multiple group comparisons.Results The normal gastric pacing zone located in the upper middle part of gastric body near greater curvature.Electrical activity of gastric body spread to gastric antrum along the long axis of the stomach.No slow signal was recorded in the gastric fundus and the gastric cardia.The frequencies of slow waves of different parts of gastric was same and the mean value was 2.61 ±0.11 cycle per minute.Compared with that of gastric body,the slow wave amplitude of gastric pacing zone was higher ((4.19±0.73) mV vs (1.67± 0.89) mV) and the speed was faster (7.24± 1.37) mm/s vs (4.94± 0.20) mm/s);the differences were statistically significant (t=18.89 and 4.95,both P＜0.01).The slow wave amplitude of gastric antrum was higher than that of gastric body ((3.21±0.49) mV vs (1.67±0.89) mV) and the speed was also faster ((6.44±0.82) mm/s vs (4.94±0.20) mm/s);the differences were statistically significant (t=4.85 and 4.95,both P＜0.05).The slow wave amplitude of gastric antrum was lower than that of pacemaker area ((3.21±0.49) mV vs (4.19±0.73) mV),and the difference was statistically significant (t =-3.67,P＜0.05);however,there was no significant difference in wave velocity ((6.44±0.82) mm/s vs (7.24±1.37) mm/s,P＞0.05).Conclusions The normal human gastric pacemaker is located in mid and upper corpus near the greater curvature,which produces slow wave and control whole gastric electrical activity.The amplitude and velocity of slow waves are in gradient changes in different gastric regions.HRM is a mature and reliable research method to study the spatio-temporal characteristics of gastric electrical activity,which provides the possibility for the study of abnormal gastric electrical activity.

Hair loss is a common condition that can have a negative impact on an individual’s quality of life. The severe side effects and the low efficacy of current hair loss medications create unmet needs in the field of hair loss treatment. Hyaluronan and Proteoglycan Link Protein 1 (HAPLN1), one of the components of the extracellular matrix, has been shown to play a role in maintaining its integrity. HAPLN1 was examined for its ability to impact hair growth with less side effects than existing hair loss treatments. HAPLN1 was predominantly expressed in the anagen phase in three stages of the hair growth cycle in mice and promotes the proliferation of human hair matrix cells. Also, recombinant human HAPLN1 (rhHAPLN1) was shown to selectively increase the levels of transforming growth factor-β receptor II in human hair matrix cells. Furthermore, we observed concomitant activation of the ERK1/2 signaling pathway following treatment with rhHAPLN1. Our results indicate that rhHAPLN1 elicits its cell proliferation effect via the TGF-β2-induced ERK1/2 pathway. The prompt entering of the hair follicles into the anagen phase was observed in the rhHAPLN1-treated group, compared to the vehicle-treated group. Insights into the mechanism underlying such hair growth effects of HAPLN1 will provide a novel potential strategy for treating hair loss with much lower side effects than the current treatments.

Paraquat dichloride (N,N-dimethyl-4-4'-bipiridinium, PQ) is an extremely toxic chemical that is widely used in herbicides. PQ generates reactive oxygen species (ROS) and causes multiple organ failure. In particular, PQ has been reported to be an immunotoxic agrochemical compound. PQ was shown to decrease the number of macrophages in rats and suppress monocyte phagocytic activity in mice. However, the effect of PQ on macrophage cell viability remains unclear. In this study, we evaluated the cytotoxic effect of PQ on the mouse macrophage cell line, RAW264.7 and its possible mechanism of action. RAW264.7 cells were treated with PQ (0, 75, and 150 muM), and cellular apoptosis, mitochondrial membrane potential (MMP), and intracellular ROS levels were determined. Morphological changes to the cell nucleus and cellular apoptosis were also evaluated by DAPI and Annexin V staining, respectively. In this study, PQ induced apoptotic cell death by dose-dependently decreasing MMP. Additionally, PQ increased the cleaved form of caspase-3, an apoptotic marker. In conclusion, PQ induces apoptosis in RAW264.7 cells through a ROS-mediated mitochondrial pathway. Thus, our study improves our knowledge of PQ-induced toxicity, and may give us a greater understanding of how PQ affects the immune system.
Animals ; Annexin A5 ; Apoptosis* ; Caspase 3 ; Cell Death ; Cell Line ; Cell Nucleus ; Cell Survival ; Herbicides ; Immune System ; Macrophages ; Membrane Potential, Mitochondrial ; Mice ; Mitochondria ; Monocytes ; Multiple Organ Failure ; Paraquat* ; Rats ; Reactive Oxygen Species