Objective: To investigate the influence of autologous adipose stem cell matrix gel on wound healing and scar hyperplasia of full-thickness skin defects in rabbit ears, and to analyze the related mechanism. Methods: Experimental research methods were adopted. The complete fat pads on the back of 42 male New Zealand white rabbits aged 2 to 3 months were cut to prepare adipose stem cell matrix gel, and a full-thickness skin defect wound was established on the ventral side of each ear of each rabbit. The left ear wounds were included in adipose stem cell matrix gel group (hereinafter referred to as matrix gel group), and the right ear wounds were included in phosphate buffer solution (PBS) group, which were injected with autologous adipose stem cell matrix gel and PBS, respectively. The wound healing rate was calculated on post injury day (PID) 7, 14, and 21, and the Vancouver scar scale (VSS) scoring of scar tissue formed on the wound (hereinafter referred to as scar tissue) was performed in post wound healing month (PWHM) 1, 2, 3, and 4. Hematoxylin-eosin staining was performed to observe and measure the histopathological changes of wound on PID 7, 14, and 21 and the dermal thickness of scar tissue in PWHM 1, 2, 3, and 4. Masson staining was performed to observe the collagen distribution in wound tissue on PID 7, 14, and 21 and scar tissue in PWHM 1, 2, 3, and 4, and the collagen volume fraction (CVF) was calculated. The microvessel count (MVC) in wound tissue on PID 7, 14, and 21 and the expressions of transforming growth factor β₁ (TGF-β₁) and α smooth muscle actin (α-SMA) in scar tissue in PWHM 1, 2, 3, and 4 were detected by immunohistochemical method, and the correlation between the expression of α-SMA and that of TGF-β₁ in scar tissue in matrix gel group was analyzed. The expressions of vascular endothelial growth factor (VEGF) and epidermal growth factor (EGF) in wound tissue were detected by enzyme-linked immunosorbent assay on PID 7, 14, and 21. The number of samples at each time point in each group was 6. Data were statistically analyzed with analysis of variance for repeated measurement, analysis of variance for factorial design, paired sample t test, least significant difference test, and Pearson correlation analysis. Results: On PID 7, the wound healing rate in matrix gel group was (10.3±1.7)%, which was close to (8.5±2.1)% in PBS group (P>0.05). On PID 14 and 21, the wound healing rates in matrix gel group were (75.5±7.0)% and (98.7±0.8)%, respectively, which were significantly higher than (52.7±6.7)% and (90.5±1.7)% in PBS group (with t values of 5.79 and 10.37, respectively, P<0.05). In PWHM 1, 2, 3, and 4, the VSS score of scar tissue in matrix gel group was significantly lower than that in PBS group (with t values of -5.00, -2.86, -3.31, and -4.45, respectively, P<0.05). Compared with the previous time point within the group, the VSS score of scar tissue at each time point after wound healing in the two groups was significantly increased (P<0.05), except for PWHM 4 in matrix gel group (P>0.05). On PID 7, the granulation tissue regeneration and epithelialization degree of the wounds between the two groups were similar. On PID 14 and 21, the numbers of fibroblasts, capillaries, and epithelial cell layers in wound tissue of matrix gel group were significantly more than those in PBS group. In PWHM 1, 2, 3, and 4, the dermal thickness of scar tissue in matrix gel group was significantly thinner than that in PBS group (with t values of -4.08, -5.52, -6.18, and -6.30, respectively, P<0.05). Compared with the previous time point within the group, the dermal thickness of scar tissue in the two groups thickened significantly at each time point after wound healing (P<0.05). Compared with those in PBS group, the collagen distribution in wound tissue in matrix gel group was more regular and the CVF was significantly increased on PID 14 and 21 (with t values of 3.98 and 3.19, respectively, P<0.05), and the collagen distribution in scar tissue was also more regular in PWHM 1, 2, 3, and 4, but the CVF was significantly decreased (with t values of -7.38, -4.20, -4.10, and -4.65, respectively, P<0.05). Compared with the previous time point within the group, the CVFs in wound tissue at each time point after injury and scar tissue at each time point after wound healing in the two groups were significantly increased (P<0.05), except for PWHM 1 in matrix gel group (P>0.05). On PID 14 and 21, the MVC in wound tissue in matrix gel group was significantly higher than that in PBS group (with t values of 4.33 and 10.10, respectively, P<0.05). Compared with the previous time point within the group, the MVC of wound at each time point after injury in the two groups was increased significantly (P<0.05), except for PID 21 in PBS group (P>0.05). In PWHM 1, 2, 3, and 4, the expressions of TGF-β₁ and α-SMA in scar tissue in matrix gel group were significantly lower than those in PBS group (with t values of -2.83, -5.46, -5.61, -8.63, -10.11, -5.79, -8.08, and -11.96, respectively, P<0.05). Compared with the previous time point within the group, the expressions of TGF-β₁ and α-SMA in scar tissue in the two groups were increased significantly at each time point after wound healing (P<0.05), except for the α-SMA expression in matrix gel group in PWHM 4 (P>0.05). There was a significantly positive correlation between the expression of α-SMA and that of TGF-β₁ in scar tissue in matrix gel group (r=0.92, P<0.05). On PID 14 and 21, the expressions of VEGF (with t values of 6.14 and 6.75, respectively, P<0.05) and EGF (with t values of 8.17 and 5.85, respectively, P<0.05) in wound tissue in matrix gel group were significantly higher than those in PBS group. Compared with the previous time point within the group, the expression of VEGF of wound at each time point after injury in the two groups was increased significantly (P<0.05), and the expression of EGF was decreased significantly (P<0.05). Conclusions: Adipose stem cell matrix gel may significantly promote the wound healing of full-thickness skin defects in rabbit ears by promoting collagen deposition and expressions of VEGF and EGF in wound tissue, and may further inhibit the scar hyperplasia after wound healing by inhibiting collagen deposition and expressions of TGF-β₁ and α-SMA in scar tissue.
Male ; Rabbits ; Animals ; Cicatrix ; Vascular Endothelial Growth Factor A ; Epidermal Growth Factor ; Hyperplasia ; Wound Healing ; Stem Cells ; Transforming Growth Factor beta

ObjectiveTo analyze the mental health status and its influencing factors in middle school students under the regular prevention and control of COVID-19， so as to provide references for the intervention and management of their mental health problems. MethodsFrom March 7 to 21， 2021， a stratified random sampling method was used to select 19 352 students from 17 schools in 3 districts and 9 counties of Linyi City， Shandong Province. Basic data were collected through a self-designed questionnaire. All students completed the Symptom Checklist 90 （SCL-90） to assess their mental health status. Then the factors affecting the mental health status of middle school students were screened using independent sample t-test， one-way ANOVA test and multiple stepwise regression analysis. Results① A total of 6 350 （32.81%） middle school students were found to have mental health problems. ② Each SCL-90 factor score and total average score yielded statistical difference among middle school students of different genders， relationships with classmate， closeness to friends， concerns about the epidemic， and pressure exerted by schoolwork （P<0.01）. Each SCL-90 factor score and total average score of middle school students were significant different in terms of the hours of smartphone usage for recreation per day， sleep duration per night in hours and exercise frequency （P<0.01）. ③ Multiple stepwise regression analysis denoted that female gender， poor relationship with classmate， no close friend and long hours of smartphone usage for recreation were the risk factors for mental health of middle school students （β=0.096， 0.183， 0.064， 0.232， P<0.01）. ConclusionThe prevalence rate of mild mental health problems is quite high among middle school students under the regular epidemic prevention and control. Additionally， female gender， poor relationship with classmate， no close friend and long hours of smartphone usage for recreation have a negative impact on middle school students' mental health.

Paclitaxel( PTX) is used as a broad spectrum anti-tumor medicine. However,serious drawbacks restrict clinical application of PTX. In this study,we prepared tumor-targeting and pH-sensitive lipoprotein-mimic nanocarrier containing paclitaxel( BSALC/DOPE-PTX) to study the effective antitumor activity. The in vivo targeting ability of the nanocarrier in tumor bearing nude mice was evaluated by using a Kodak in vivo imaging system FX PRO. The in vivo anti-tumor activity was evaluated in MDA-MB-231 tumor bearing mice,and representative sections were stained with hematoxylin and eosin( H&E),and examined by light microscopy. The results showed that DiR-loaded FA-BSA-LC/DOPE selectively targeted tumor,and had a relatively long residence in the tumor tissue. According to the in vivo anti-tumor activity study,FA-BSA-LC/DOPE-PTX exhibited an outstanding tumor inhibition effect with a tumor growth inhibition rate of 79.3%,and tumor tissue sections stained by hematoxylin and eosin( HE) showed severe necrosis areas and many dead cells with condensed nuclei in the FA-BSA-LC/DOPE-PTX group. Therefore,FA-BSA-LC/DOPE-PTX is a biocompatible,tumor-targeting and pH-sensitive lipoprotein-mimic nanocarrier,with a very marked anti-tumor activity in tumor-bearing mice in vivo.
Animals ; Antineoplastic Agents, Phytogenic ; pharmacology ; Cell Line, Tumor ; Drug Carriers ; Hydrogen-Ion Concentration ; Lipoproteins ; Mice ; Mice, Nude ; Nanoparticles ; Neoplasms, Experimental ; drug therapy ; Paclitaxel ; pharmacology

OBJECTIVETo explore the clinical efficacy of GEMOX regimen on patients with refractory non-hodgkin's lymphoma.

METHODSEighty-two cases of non-Hodgkin's lymphoma were divided into 2 groups: gemcitabine+oxaliplation(Gem+Oxa) group (42 cases) and vinorelbine+oxaliplatin(Vin+Oxa) group (40 cases) according to chemotherapy regimens. The clinical efficacy, side effects, progression-free survival situation in 2 groups were compared.

RESULTSThere was no significant difference on the clinical effects of 2 groups (P>0.05); The therapeutic efficacy for B cell lymphoma was higher than that for T cell lymphoma(P<0.05); The therapeutic effects for I-II stages was lower than that for III-IV stages(P<0.05); The incidences of platelet decline, nausea and vomit, peripheral nerve symptoms in Gem+Oxa group were lower than those in Vin+Oxa group(P<0.05); There was no significant difference in the median progression free survival(P>0.05).

CONCLUSIONThe efficacy of GEMOX regimen for refractory non-Hodgkin's lymphoma has been confirmed to be good, it has distinct clinical curative effect, it can prolong the progression-free survival time in patients with B cell lymphoma, specially for III-IV stages. It can be used as the preferred method for the treatment of patients with refractory NHL.

Objective: To analyze the clinical data and summarize therapeutic experiences of cervicofacial venous malformations involving isthmus faucium area. Methods: Clinical records from 143 patients with venous malformations involving isthmus faucium area treated at our hospital between January 2012 and January 2016 were reviewed. There were 70 males and 73 females. Age ranged from 1 to 52 years old, with a median age of 14.5 years. There were 19 cases with lesions involving in only 1 subanatomic area above and 124 cases with lesions involving in more than 1 subanatomic areas, including 63 cases with lesions involving in more than 2 areas. There were 50 patients presenting with additional maxillofacial and cervical lesions. Clinical symptoms included snoring (n=98), indistinct phonation (n=49), and tonsil hypertrophy more than degree Ⅱ (n=19). Tracheotomy was performed in 3 patients prior to hospitalization, contigency tracheotomy during hospitalization in 10 patients, and oral trachea cannula in other patients. All therapeutic procedures, including single chemical ablation with ethanol injection (n=94), single lesion resection (n=9) and both of them (n=40), were performed under general anesthesia. Treatment remedies included mesh suture, macroglossia reduction and excision of maxillofacial and cervical lesions for patients presenting with extensive malformations extending to maxillofacial and cervical area. Tonsil resection were done in patients having tonsil venous malformations or tonsil hypertrophy more than degree II. Achauer′s 4-grade criterion was applied to evaluate the treatment outcomes. SPSS 18.0 software was used to analyze the data. Results: Trachea cannula were not extubated untill 24 to 48 hours after treatment. Emergency tracheotomy was done in 2 cases after extubations because of dyspnea, and successful extubations were obtained in other cases. There were no advents of pulmonary vascular spasm or pulmonary embolism. There was significant difference between before and after operation (snore: χ²=105.431, ambiguous pronunciation: χ²=59.698, tonsil hypertrophy more than degree Ⅱ: χ²=33.530, all P<0.01). The patients were followed-up for 1-4 years, and there were 123 cases at grade Ⅳ (complete disappear of lesions in 62 cases without recurrence), 17 at grade Ⅲ , 3 at grade Ⅱ, and no case at gradeⅠ. Conclusions Chemical ablation with ethanol injection for venous malformations involving isthmus faucium area is recommended, wheras combined remedies including injection, mesh suture, macroglossia reduction, and excision of cervicofacial lesions are suggested in treatment of extensive lesions extending to maxillofacial and cervical area. Tonsil resection should be done in patients having tonsil venous malformations or tonsil hypertrophy more than degree Ⅱ, which is safe and highly effective, with good reservation of function, in the treatment of maxillofacial and cervical venous malformations involving isthmus faucium area.

Trollius chinensis has a wide range of pharmacological effects ，including anti-oxidative ，antibacterial，antiviral， anti-inflammatory，anti-tumor，anti-aging，antipyretic and analgesic effects ，relieving cough and removing phlegm ，viscera protection，and so on. Flavonoids and phenolic acids are the main medicinal components of it ，especially three monomers have a wide range of efficacy and have been studied more ，such as orientin ，vitexin and 2″-O-galactopyranosyl orientin. T. chinensis is mostly used in clinical practice in the form of Chinese patent medicines ，such as Jinlianhua granules ，Jinlianhua capsules ， Jinlianhua tablets and Jinlianhua oral liquid. These medicines are used to treatment of upper respiratory tract infection ，pharyngitis， tonsillitis，periodontitis，mumps，oral ulcer ，and hand-foot-mouth disease. They are usually used by combining with Western medicine. Due to its definite curative effect and less adverse drug reactions ，T. chinensis related preparations are more suitable for pediatric population ，and they can be used for the treatment of upper respiratory tract infection in children ，acute suppurative tonsillitis in children ，epidemic mumps in children ，hand-foot-mouth disease in children ，which is also one of its drug characteristics. This paper review the relevant literatures in recent 20 years from the respective of pharmacological effects and clinical applicationin order to provide reference for further promoting rational clinical application of T. chinensis and new drug research and development.

OBJECTIVE: To construct a tumor-targeting and pH-sensitive lipoprotein-mimic nanocarrier containing paclitaxel(BSA-LC/DOPE-PTX)for effective antitumor therapy. METHODS: In vitro drug release study was conducted using dialysis method. The stability of BSA-LC/DOPE-PTX was studied by testing the aggregation of BSA-LC/DOPE-PTX in 50% human plasma. The cytotoxicity of drug-loaded nanocarrier against MCF-7 cells was evaluated by standard MTT assay. The subcellular localization and intracellular drug release behavior of BSA-LC/DOPE were evaluated by LSCM. RESULTS: In vitro drug release study demonstrated that paclitaxel(PTX)was released from BSA-LC/DOPE in a pH-dependent manner. The stability study showed that there was no significant change, suggesting that the coupling BSA could increase the stability in plasma. The cellular inhibition of BSA-LC/DOPE-PTX with BSA targeting agents was greater than that of LC/DOPE-PTX. BSA-LC/DOPE facilitated the capacity of endosomal escape, and rapidly released the loaded agents into the cytoplasm under acid conditions in lysosomes. CONCLUSION: BSA-LC/DOPE, as biocompatible, tumor-targeting and pH-sensitive lipoprotein-mimic nanocarrier, is a promising system for effective intracellular delivery of PTX to tumors with optimal anti-tumor efficacy.

Objective: To explore the clinical effect and safety of minor liver resection for hilar cholangiocarcinoma (HC) of Bismuth-Corlette type Ⅲ and Ⅳ. Methods: From May 2007 to May 2017, the clinical data of 108 patients with Bismuth-Corlette type Ⅲ and Ⅳ HC underwent hepatectomy were collected and analyzed retrospectively.There were 56 males and 52 females, aged (57.2±5.3) years (ranged 48-76 years) .Among the 108 cases, there were 51 cases of type Ⅲa, 40 cases of type Ⅲb and 17 cases of type Ⅳ. Small-scale hepatectomy (≤3 hepatectomy) was performed in 70 cases, including 8 cases of 4b segment resection, 28 cases of 4b segment+5 segment resection, and 34 cases of partial 4 segment+partial 7 segment+partial 1 segment resection. Large-scale hepatectomy was performed in 38 cases (>3 segments) , of which 30 cases were treated with 2 segments+3 segments+4 segments+1 segment, and 8 cases were treated with 5 segments+7 segments+8 segments+1 segment. t′ test was used to analyze the data which did not conform to the normal distribution, and χ² test was used to calculate the incidence of postoperative complications and the 1, 3, and 5-year cumulative overall survival rate. Results: (1) The operation time of minor liver resection group ((180±25)minutes) was shorter than that of major liver resection group ((210±35)minutes) (t′=4.676, P<0.05) , the amount of blooding operation time of minor liver resection group ((310±80)ml) was less than that of major liver resection group ((500±110)ml)in the operation (t′=9.385, P<0.05) , and the difference was statistically significant. (2) The incidence of complications was lower in minor liver resection group and major liver resection group, and the difference was statistically significant (χ²=5.230, P<0.05) . (3) The actual 1-, 3- and 5-year survival rates were 87.1%, 58.4%, 30.0% and 84.2%, 57.9%,31.6%, respectively. There were no significant differences in survival rates in two groups in 1-, 3- and 5-year survival rates (χ²=0.177, P=0.674; χ²=0.005, P=0.946; χ²=0.029, P=0.865) . Conclusions Compared to patients with major liver resection, Minor liver resection for selected patients with HC of Bismuth-Corlette Ⅲ and Ⅳaccording to our criteria achieved better long-term outcomes. Chen′s biliojejunostomy is a simple, effective and safe method, which can be widely used when there are multiple biliary intestinal anastomosese.

Objective: This paper constructed the children’s multiple sports activity module from the perspective of Multiple Intelligences, and explored the effect of sports activity module on physical fitness of young children. Methods: A total of 176 children aged 3-6 years were randomly divided into control and experimental classes for 24 weeks, 5 times/week, 30 minutes/time. Children in the experimental class received multi-sports activity module, and children in the control class received general sports activities. Activity duration, intensity and frequency of the experimental class and the control class were basically the same. Results: This study constructed the children’s multiple sports activity module with eight pieces of content from the perspective of Multiple Intelligences. Before the intervention, there was no statistical difference between the experimental class and the control class(P>0.05), and the height of the children aged 3 to 4 years after the intervention in the experimental class [(109.29±6.56)cm] was significantly higher than that before the intervention[(105.11±5.51)cm](P<0.01). After intervention, the walking balance beam, the 10-meter reverse run and the feet continuous jump of the children aged 3 to 4 years in the experimental class were significantly higher than those in the control class(P<0.01). The standing long jump, sitting position forward flexion of the children aged 3 to 4 years were also significantly higher than those in the control class(P<0.05). The balance beam of the children aged 4 to 5 years in the experimental class was significantly higher than that in the control class(P<0.01). Tennis throw, sitting position forward flexion, 10-meter reverse run, feet continuous jump of the children aged 4 to 5 years were also significantly higher than the control class(P<0.05). The walking balance beam of the children aged 5 to 6 years was significantly higher in the experimental class than that in the control class(P<0.01), the standing long jump tennis throw, the sitting position forward flexion, The 10-meter reverse run and the continuous jump of the feet of the children aged 5 to 6 years were also significantly higher than those in the control group(P<0.05). Conclusion The multi-sports activity module is superior to the general sports activities in developing children’s physical fitness and can be promoted as a project to develop children’s physical fitness.

OBJECTIVE: To study the relationship between genetic polymorphisms of GSTM1 GSTT1 and the susceptibility of laryngeal and hypopharyngeal carcinomas (LHC). METHOD: The GSTM1 and GSTT1 genotypes were determined by multiplex PCR analysis in 76 LHC patients and 76 population controls. The association between the genotypes and LHC risk was measured by odds ratios (ORs) and 95% confidence intervals (95% CIs). RESULT: The frequency of GSTM1 null genotype was 59.2% in the LHC patients and 42.1% in controls (OR=1.935, 95% CI=1.069-3.510), the difference was significant (P<0.01). The frequency of GSTT1 null genotype was 57.9% in the LHC patients and 51.3% in controls. The difference was not significant (P>0.05). In smokers, the risk of the LHC increased in subjects of GSTM1 null genotype (OR=5.545, 95% CI=2.158-13.528). CONCLUSION GSTM1 polymorphisms are associated with susceptibility to the LHC. It has the synergistic effects with smoking in the development of the LHC. GSTT1 genotypes might have no association with risk of the LHC in urban Linyi.
Carcinoma, Squamous Cell ; genetics ; Case-Control Studies ; Disease Susceptibility ; Female ; Gene Frequency ; Genotype ; Glutathione Transferase ; genetics ; Humans ; Hypopharyngeal Neoplasms ; genetics ; Laryngeal Neoplasms ; genetics ; Male ; Polymorphism, Genetic