Objective To investigate the prognosis and recurrent factors of primary retroperitoneal liposarcoma (PRPLS).Methods The retrospective case-control study was conducted.The clinicopathological data of 51 patients with PRPLS who were admitted to the Southwest Hospital of the Third Military Medical University from January 2005 and March 2015 were collected.Observation indicators:(1) follow-up institution.(2) Analysis of prognostic factors:gender,age,tumor diameter,combined organs resection,pathological type,cancer risk and local recurrence.(3) Analysis of recurrent risk factors:gender,age,tumor diameter,combined organs resection,pathological type and cancer risk.(4) Stratified analysis:the independent risk factors of recurrence were done by the stratified analysis.(5) Correlation between cancer risk and tumor diameter or number of organs invaded.(6) Correlation between adjacent organ invasion and tumor diameter.Follow-up using outpatient examination and telephone interview was performed to detect the survival of patients and tumor recurrence up to October 2015.The survival rate and curve were respectively calculated and drawn by KaplanMeier method.The univariate analysis and survival analysis were done using the Log-rank test.The multivariate analysis was done by the COX regression model.The correlation analysis was done using the Pearson test.Results (1) Follow-up institution:51 patients were followed up for 3-114 months,with a median time of 43 months.The 3-year survival rate of 51 patients was 70.6％.Twenty-two patients had the first local recurrence,with a recurrent time of 3-60 months and a median time of 29 months.(2)Analysis of prognostic factors:the results of univariate analysis showed that tumor diameter,combined organs resection,pathological type,cancer risk and local recurrence were the related factors affecting prognosis of patients with PRPLS (x2 =5.926,4.936,17.856,17.279,14.568,P ＜ 0.05).The results of multivariate analysis showed that combined organs resection,pathological type and cancer risk were the independent factors affecting prognosis of patients with PRPLS [OR =0.538,0.645,9.620,95％ confidence interval (CI):0.238-0.997,0.458-1.058,1.692-18.714,P ＜ 0.05].(3) Analysis of recurrent risk factors:the results of univariate analysis showed that pathological type and cancer risk were the related factors affecting recurrence of patients with PRPLS (x2 =12.375,12.364,P ＜ 0.05).The results of multivariate analysis showed that cancer risk was an independent factor affecting recurrence of patients with PRPLS (OR =6.234,95％ CI:1.419-27.377,P ＜ 0.05).(4) Stratified analysis:the 3-year survival rates of 11 patients with low risk of recurrence of PRPLS and with high risk of recurrence of PRPLS were 63.6％ and 9.1％,respectively,with a statistically significant difference (x2 =12.364,P ＜ 0.05).(5)Correlation between cancer risk and tumor diameter or number of organs invaded.Tumor diameter and number of organs invaded were respectively (17 ±8)cm,1 ± 1 in 33 patients with low risk of PRPLS and (19 ±5)cm,2 ± 1 in 18 patients with high risk of PRPLS,with no statistically significant difference in tumor diameter (r =0.222,P ＞ 0.05) and with a statistically significant difference in number of organs invaded (r =0.666,P ＜ 0.05).(6)Correlation between adjacent organ invasion and tumor diameter.Tumor diameter was (16 ± 8) cm in 19 patients without adjacent organ invasion and (19 ± 7)cm in 32 patients with adjacent organ invasion,respectively,showing no statistically significant difference (r =0.225,P ＞ 0.05).Conclusions The combined organs resection,pathological type and cancer risk are independent factors affecting prognosis of patients with PRPLS,and cancer risk is an independent factor affecting recurrence of patients with PRPLS.The prognosis of patients with low risk of PRPLS is better than that with high risk of PRPLS.The organ invaded is much likely to occur in patients with high risk of PRPLS.

Objective: To study the effect of palate repair operation on middle ear function. Methods: Cleft palate was repaired with double-opposing Z-plasty(DOZ) in 20 cases and with routin method (RM ) in 23 cases. Secretory otitismedia (SOM), high negative pressure (HNP), stapedial reflex(SR) and low acoustic compliance (LAC) were determined 3d before and 6 months after operation respectively. Results: Of the total 86 ears, before operation the persentages of SOM, HNP, SR and LAC were 61. 63, 75. 58, 29. 07 and 65. 15; after operation those were 31.39, 43.02, 66.28 and 33.72, respectively. Of the 40 ears of the cases treated with DOZ the persentages of those were 20.00, 27.50, 72.50 and 25.00) while of the 46 ears of the cases treated with RM those were 41.30, 56.52, 60.87 and 41.30 respectivellly. Conclusion: Middle ear function can be improved by palate repairs surgery, better results may be achieved with double opposing Z-plasty technique.

Objective To investigate the effects of chronic restraint stress on learning and memory in Wistar and Sprague-Dawley (SD) rats.Methods Healthy adult male Wistar rats (n=6) and Sprague-Dawley rats (n=6) were subjected to restraint stress 10 h daily for 28 days.After that, all rats were tested for recognition memory by novel object recognition test , and spatial memory and working memory by Morris water maze test .Results After restraint for 10 h daily for 28 days, the restraint rats of the two strains demonstrated lower discrimination index (DI)than the control group, but on-ly SD rats showed significant difference ( P<0.05 ) .The restraint SD rats showed higher escape latency than the control rats, and on the 5th day the difference became significant (P<0.05), and there was no significant difference between Wistar restraint and control rats .The working memory test showed that restraint SD rats exibited longer escape latency than the control rats (P<0.05), while Wistar rats didn’t show significant difference between the two groups .Conclusions The results of this study demonstrate that the impairments of learning and memory in SD rats subjected to restraint 10 hour per day for 28 days are more serious than that in the Wistar rats .Therefore , SD rats may be a better choice as an animal model to study the effects of chronic restraint stress on learning and memory impairment .

OBJECTIVETo compare the efficacy between laparoscopic and open surgery in the treatment of gastric gastrointestinal stromal tumor (gastric GIST), and to explore the feasibility and safety of laparoscopic resection for gastric GIST.

METHODSClinical data of 226 gastric GIST patients confirmed by pathology with maximal tumor diameter less than 10 cm undergoing operation in our department from January 2002 to December 2013 were retrospectively analyzed. Among them, 158 patients received laparoscopic surgery(laparoscopic group), and 68 open surgery (open group). Related indicators of clinical efficacy were compared between the two groups. Laparoscopic group patients were further divided into 4 groups according to chronological order, including 39 patients in group A, 39 in group B, 39 in group C and 41 in group D. Operating time was compared among 4 groups.

RESULTSCompared with the open group, laparoscopic group had shorter operation time [(138.8±69.2) min vs. (173.3±74.5) min, P=0.001], less intraoperative bleeding [30 ml vs. 125 ml, P=0.000], faster recovery to postoperative first flatus [(3.2±1.1) d vs. (3.8±1.1) d, P=0.000] and resumption of oral intake [(3.9±1.5) d vs. (4.7±1.5) d, P=0.000], and a shorter hospital stay [(8.1±2.3) d vs. (10.0±2.6) d, P=0.001]. The operation time of laparoscopic group A, B, C and D was (181.0±81.2) min, (124.7±57.8) min, (126.9±67.9) min and (123.4±51.8) min respectively, and the difference was statistically significant(F=7.188, P=0.001). Median follow-up time of 226 patients was 32 months(5 to 104 months). In laparoscopic group, 136 cases(86.1%) received follow-up, and the 1-, 3-, and 5-year overall survival were 98.7%, 90.7% and 72.8% respectively. In the open group, 59 cases (86.8%) received follow-up, and the 1-, 3-, and 5-year overall survival were 98.3%, 87.1% and 83.1%, respectively. The survival between two groups were not significantly different(P=0.164).

CONCLUSIONSLaparoscopic surgery removing gastric GIST with a maximal diameter of less than 10 cm is safe and feasible. The learning curve of laparoscopic gastric GIST surgery is about 40 cases.

Gastrectomy ; Gastrointestinal Neoplasms ; Gastrointestinal Stromal Tumors ; Humans ; Laparoscopy ; Length of Stay ; Operative Time ; Postoperative Period ; Retrospective Studies ; Safety

Objective: To compare the clinical efficacy of proximal gastrectomy with double tract reconstruction (PG-DT) and total gastrectomy with Roux-en-Y reconstruction (TG-RY) for proximal gastric cancer. Methods: The retrospective study was conducted. Clinicopathological data of 132 patients with proximal gastric cancer confirmed by pathology who underwent PG-DT (n=51) or TG-RY (n=81) by the same surgeon team in Southwest Hospital of Army Military Medical University between January 2006 and December 2016 were collected. Patients with preoperative neoadjuvant therapy, non-R0 resection and non-adenocarcinoma confirmed by pathology were excluded. Observation indicators included intraoperative (operation time and blood loss); postoperative (time to flatus, hospital stay, total complications, metastasis of lymph nodes around distal side of stomach from cases undergoing TG-RY), follow-up (long-term hemoglobin level, incidence of anemia, and survival) parameters. Survival analysis was conducted using the Kaplan-Meier method, and Log-rank test was used to compare survival difference between two groups. Results: No statistically significant differences were found between two groups in the baseline data, including age, gender, BMI, hemoglobin level before operation, postoperative TNM stage, tumor size and histological differentiation between two groups (all P>0.05). There were no significant differences between PG-DT and TG-RY in intraoperative blood loss [200 (200) ml vs. 200 (195) ml, Z=-1.860, P=0.063], time to flatus [(2.7±1.0) days vs. (2.6±1.1) days, t=0.225, P=0.823], postoperative hospital stay [10(3) days vs. 10 (4) days, Z=-0.449, P=0.654] and morbidity of perioperative complications [5.9% (3/51) vs. 8.6% (7/81), χ²=0.081, P=0.775]. Compared with the TG-RY group, PG-DT group had longer total operative time [294 (97) minutes vs. 255 (71) minutes, Z=–3.148, P=0.002]. The hemoglobin data of 42 patients with PG-DT and 56 patients with TG-RY were collected 1 year after operation. The incidence of anemia in PG-DT group was lower than that of TG-RY group [64.2%(27/42) vs. 82.1% (46/56), χ²=4.072, P=0.045], and PG-DT group had higher level of hemoglobin than TG-RY group [(114.4±16.3) g/L vs. (106.6±15.0) g/L, t=2.435, P=0.017]. There were 4 cases (4/81, 4.9%) with metastasis of lymph nodes around distal side of stomach in TG-RY group. All of these 4 tumors were T4 in depth and were more than 5 cm in diameter. The median follow-up period was 26 (1 to 110) months. One-year, 3-year and 5-year survival rates were 93.2%, 65.3% and 55.0% in PG-DT group, and 85.8%, 63.8% and 47.2% in TG-RY group, respectively without significant difference (χ²=0.890, P=0.345). Conclusions Compared with TG-RY, PG-DT has the same safety and feasibility for proximal gastric cancer. Although the operative time is a little longer than TG-RY, PG-DT has advantages in improving the postoperative hemoglobin level.

Objective: To evaluate the efficiency and safety of low intensity conditional regimen for children with Fanconi anemia (FA) receiving allogenic hematopoietic stem cells transplantation (allo-HSCT). Methods: Four patients diagnosed as Fanconi anemia were enrolled in this study. One patient received HLA-identical sibling donor hematopoietic stem cell transplantation, two patients underwent unrelated donor matched (UD) HSCT, and one patient received unrelated cord blood transplantation. The conditional regimen consisted of Busulfan with low dose of cyclophosphamide. Results: All 4 cases succeeded in allo-HSCT. The median time for neutrophils engraftment was 11(9-15) day, median time to platelets (PLT) engraftment was 12 (8-28) day. One case occurred with grade I of aGVHD, 1 case with hemorrhagic cystitis. No patient happened with hepatic veno-occlusive disease (VOD). Conclusion Low intensity of conditional regimen is efficient and safe which should be recommended for FA patients with HSCT.

Objective: To study the change of STAT1 expression in the anterior cingulate cortex on rats under orthodontic force, and to further explore the roles of STAT1 and related JAK-STAT1 signaling pathway in the mediation and regulation of pain during tooth movement. Methods: 112 male Sprague-Dawley (SD) rats (225±25 g) were used in this study. They were randomly divided into experimental groups (96 rats) and control groups (16 rats). All rats were installed bilateral maxillary device for tooth movement models. Rats in the experimental groups were applied 80g orthodontic force on both sides and were divided into six subgroup 4 h, 12 h, 24 h, 2 d, 3 d, 7 d, with 16 rabbits in each subgroup. The control groups were only installed the same orthodontic devices, without the application of orthodontic force. Brain tissue of the anterior cingulate cortex was isolated after 4 h, 12 h, 24 h, 2 d, 3 d, 7 d since experiment, and the expression level of STAT1 and p-STAT1 was analyzed with the method of immunofluorescence and PCR. Results : For the immunofluorescence result, there was significant difference in STAT1 expression between control groups and different experimental groups at different time points in total (P < 0.05). The STAT1 expression amount in the 4 h group decreased significantly when compared with the control group (P < 0.05); to the 2 d group, the difference is still statistically significant (P < 0.01). 3 d group, 7 d group and control group had no statistically significant difference. The STAT1 expression amount in 4 h group, 12 h group, 24 h group was significantly lower than that in 3 d and 7 d groups, differences were statistically significant (P < 0.05). The STAT1 expression in the 2 d group was significantly lower than that of 7 d (42.35 ± 5.77) group, the difference was statistically significant (P < 0.05). There was significant difference in p-STAT1 expression between control groups and different experimental groups at different time points in total (F = 623.518, P < 0.05). The p-STAT1 expression amount in experimental groups were higher than that in the control group (P < 0.05). The p-STAT1 expression in 4 h group was lower than that in 12 h and 24 h group and higher than that in 2 d, 3 d and 7 d groups, of which the differences were statistically significant (P < 0.05). The p-STAT1 expression in 12 h group was lower than that in 24 h group and higher than that in 2 d, 3 d and 7 d groups, of which the differences were statistically significant (P < 0.05). For the PCR result, the expression of mRNA in STAT1 of experimental groups of 4 h, 12 h, 24 h, 2 d, 3 d, 7 d and the control groups were not statistically significant (P > 0.05). Conclusions After applying orthodontic force, the expression of STAT1 decreased transiently and the expression of p-STAT1 increased transiently. The reduction of STAT1 was probably caused by the phosphorylation of STAT1 and decrease in the translation level of STAT1, rather than changes in the transcriptional levels. The orthodontic pain might be related with the activation of STAT1 into phosphorylated STAT1.

Colorectal cancer (CRC) has a high incidence and mortality rate worldwide. Its lesions are associated to gene mutation, epigenetic changes and activation of related signaling pathways. microRNAs (miRNAs) are a class of non-coding RNAs of 20-24 nt in length that can regulate the expression of target mRNAs and control various cellular mechanisms. As a novel marker for the treatment and prognosis of colorectal cancer, miRNAs are closely related to the occurrence and progression of colorectal cancer. In this review, we summarize the miRNAs dysregulated in CRC tissues, analyze the relationship between specific miRNAs and CRC proliferation, metastasis, apoptosis, and chemotherapy, and present the clinical applications of miRNAs in CRC treatment and prognosis.

Objective    To investigate the perioperative hemodynamic changes of off-pump coronary artery bypass grafting (OPCABG) patients monitored by pulse recorded analysis method (MostCare/PRAM devices) and its relationship with the prognosis. Methods    A total of 89 patients who underwent OPCABG from October 2016 to January 2017 in Beiijng Anzhen Hospital were included, including 53 males and 36 females aged 60.50±8.40 years. The hemodynamic changes were recorded. The patients were divided into two groups (a major adverse cardiovascular events group and a stable group) according to whether major adverse cardiovascular events occurred or not. The difference of hemodynamic changes between the two groups was analysed. Results    The mean percentage increases of stroke volume (SV) in the passive leg raising (PLR) test before opening chest and after chest closure were 23.00%±3.20% and 29.40%±3.70%, respectively. Hemodynamic data were analysed seven times, namely, anaesthesia, opening chest, heparin administration, coronary artery bypass grafting, protamine administration, thoracic closure and after operation. SV was significantly decreased during above periods, while systemic vascular resistance index (SVRI) was significantly increased. Cardiac circle efficiency (CCE) and maximum pressure gradient (dP/dT) were decreased after anaesthesia, and decreased to the lowest value during the procedure of bypass grafting, and then they began to increase gradually after the manipulation of bypass grafting was finished. Stroke volume variation (SVV) and pulse pressure variation (PPV) were slightly decreased during anaesthesia, then increased significantly through the whole surgery. Major adverse cardiovascular events occurred in 9 patients and 4 of them died. The basic mean values of SVRI, SVV and PPV of patients in the major adverse cardiovascular events group before opening chest were significantly higher than those of patients in the stable group. There was no significant difference in the mean values of CCE, dP/dT or SV between the two groups. There was no significant correlation between the prognosis and the mean values of SVRI, SVV, PPV, CCE, dP/dT or SV. Conclusion    The hemodynamic indexes are not stable, thus, it is necessary to monitor the perioperative hemodynamic changes of OPCABG patients timely by MostCare/PRAM device and adjust treatment measures accordingly.

As an important intracellular genetic and regulatory center, the nucleus is not only a terminal effector of intracellular biochemical signals, but also has a significant impact on cell function and phenotype through direct or indirect regulation of nuclear mechanistic cues after the cell senses and responds to mechanical stimuli. The nucleus relies on chromatin-nuclear membrane-cytoskeleton infrastructure to couple signal transduction, and responds to these mechanical stimuli in the intracellular and extracellular physical microenvironments. Changes in the morphological structure of the nucleus are the most intuitive manifestation of this mechanical response cascades and are the basis for the direct response of the nucleus to mechanical stimuli. Based on such relationships of the nucleus with cell behavior and phenotype, abnormal nuclear morphological changes are widely used in clinical practice as disease diagnostic tools. This review article highlights the latest advances in how nuclear morphology responds and adapts to mechanical stimuli. Additionally, this article will shed light on the factors that mechanically regulate nuclear morphology as well as the tumor physio-pathological processes involved in nuclear morphology and the underlying mechanobiological mechanisms. It provides new insights into the mechanisms that nuclear mechanics regulates disease development and its use as a potential target for diagnosis and treatment.
Cell Nucleus ; Biophysics ; Cytoskeleton ; Phenotype ; Signal Transduction