Metformin as a cheap,safe and effective diabetes drug,has been used for many years. Recently,many studies have shown its variety inhibition of tumor cells. Its antitumor mechanism is not entirely clear;may be related to glucose metabolism and protein kinase or inflammatory cytokines mediating tumor kill-ing. Metformin has different cytotoxic effects to various tumor cell,as well as playing some auxiliary roles on other antitumor methods.

Objective To explore the microanatomy of the horizontal segment of the facial nerve (FN)in temporal bone and its adjacent structures,in order to provide microanatomical datag for the clinical works.Methods In 20 adult wet skull specimens(40 temporal bones),horizontal segment of FN and their adjacent structures in temporal bones were observed according to operational layers by simulating transmagtoid approach.Results The lenglh of the horizontal segment was[(8.85±1.01)(7.10～11.25)]mm;The diameter of the horizontal segment wag[(1.88±0.65(1.55～1.90)]mm;The angle opening towards anterior direction between horizontal segment and vertical segment wag[(115.5±6.89)(109.5～128.6)]..The ansh towards posterior direction between horizontal segment of FN and tympanic tegmen wag [(28.5±3.66)(25.8～31.5)°;The vertical distance from the cochlear form process to the horizontal segment of the FN wag[(1.89±0.58)(0.90～3.05)]mm;The vertical distance from the head of the stapes to the horizontal segment of the FN wag[(2.30±0.85)(1.97～3.11)]mm;The distance between the summit of pyramidal segment of FN and the apex of shor limb of incus wag 2.55±0.21(2.10-2.90)mm;The distance between the summit of pyramidal segment of FN and the eminence of the lateral semicircuiar canal wag[(2.86±0.31)(2.23～3.56)]mm;No branching or dislocated nerve of the horizontal segment of the FN wag found in all 40 cases.Five percent(2/40)distal part of the horizontal segment of FN tracks forward lateral to the eminence of the literal semicircular canal.Conclusion Geniculate ganglion,cochlearform process,stapes,tympanic tegmen,lateral semicircular canal,incus are important landmarks by which horizontal segment of FN might be located in manipulation of mastoid;The relations of horizontal segment of FN and its adjacent structures are complicated,compact.It will be good that the manipuliter absorb a great deal of anatomical knowledge about landmarks that can be used in locating horizontal segment of FN.

Objective To explore the clinical features and treatment of thyroid carcinoma in children. Method The clinical data of 19 children under 14 years old with thyroid carcinoma diagnosed and treated from January 2003 to January 2014 were retrospectively analyzed. Results In 19 cases (12 males and 7 females), there were 18 cases of papillocarcinoma and one case pf follicular carcinoma. Unilateral lobectomy plus isthmectomy was performed in 6 cases, subtotal thyroidectomy in 4 cases and total thyroidectomy in 9 cases. Unilateral cervical lymph node dissection was performed in 5 cases and bilateral in 11 cases. After the operation, multiple lesions were confirmed by pathology in 9 cases, thyroid capsular invasion in 14 cases, lymphatic metastasis in 15 cases and distant metastasis in 5 cases. All the patients were treated with TSH, and 10 cases were treated with 131I after operation. The median follow-up time was 63 months. There was no death in all cases, while local residual tumor recurrence was found in 2 cases and cervical lymph node metastasis in 2 cases and distant metastasis in one case. Conclusion Thyroid carcinoma in children is mostly well-differentiated, so the overall prognosis is better. However, children who have extracapsular invasion, multiple lesions in bilateral thyroid, cervical lymph node metastasis and distant metastasis are at high risks and should be treated with comprehensive therapy that includes total thyroidectomy.

Objective To explore the incidence and factors of paranasal sinusitis among nasopharyngeal carcinoma (NPC) patients after radiotherapy. Methods Retrospectively evaluated the clinical data of 144 NPC patients without paranasal sinusitis before radiotherapy, including 82 cases in T1/T2 stage and 62 cases in T3/T4 stage treated in the First Affiliated Hospital of Bengbu Medical College from 2000 to 2005. MRI images before and after radiotherapy were compared. The incidence and factors of paranasal sinusitis were analyzed. There were 58 cases of nasal invasion. Nasopharyngeal carcinoma was given at face-neck joint portal with 6 MV X-ray fractionated irradiation 68-78 Gy during 6-8 weeks. The number of patients who received radiotherapy with less than or equal to 70 Gy, more than 70 Gy radiation doses were 89 and 55, respectively. Cervical part were treated with high-energy electron beam, patients with positive neck lymph nodes and with negative neck lymph nodes received 64-74 Gy doses during 6-8 weeks and 50-54 Gy during 4-5 weeks, respectively. Results Among the 144 NPC patients 86.8%(125/144) developed paranasal sinusitis after radiotherapy, the incidence rates of paranasal sinusitis (IRPS) was higher among stage T3 + T4 patients than that among stage T1 + T2 patients (94% vs 82% ,x2=4.32, P ＜0.05). Among patients who were given radiotherapy with more than 70 Gy,less than or equal to 70 Gy radiation doses on the nasopharynx, the IRPS were 95% and 82.0% (x2 = 4.65, P ＜ 0.05 ). The IRPS in patients with nasal cavity infringement was higher than that in others (95% vs. 81% , x2 = 5.46,P ＜0.05). The IRPS at 3, 6, 12 months, and more than 1 year after radiotherapy were 13.6% ,31.2% ,48.8% and 6.4%, respectively (x2 = 70.48, P ＜ 0.001 ). Conclusions The incidence of paranasal sinusitis in NPC patients after radiotherapy was very high, and reached a peak in one year. It was influeneed by invasion of nasal cavity or not, the dose of radiotherapy and T stage.

OBJECTIVE To observe the effect of natrin from Naja naja atra(Chinese cobra)on intracellular free calcium overload,and to discuss the protective effect and the possible mechanism of natrin on myocardium calcium(Ca2+)and potassium(K+)ion channels in the primary cardiomyocytes of SD neonatal rats. METHODS The primary cardiomyocytes of SD neonatal rats were used,which were respectively pretreated with natrin 5,25 and 125 mg · L-1 for 24 h before injury was induced by H2O2 0.3 mmol · L- 1. The dynamic variation of intracellular calcium was monitored by laser confocal microscopy using Fluo-3 as Ca2+fluorescence probe. Additionally,the cardio myocytes of neonatal rats were pretreated for 24 h using different concentrations of natrin 5,25,125 mg · L-1 and verapamil 5 nmol · L-1,followed by exposure to H2O2 0.3 mmol · L-1 for 15 min. Then,the mRNA expressions of calcium channels subunits Cav1.2,Calm,RyR2 and potassium channel Kir6.2 were analyzed by FQ-PCR method. RESULTS Laser confocal microscopy revealed that H2O2 obviously caused calcium overload in cardiomyocytes, giving rise to 49.37% fluorescence increase in intracellular calcium compared with the control group(P<0.01). However,natrin 5,25 and 125 mg·L-1 resulted in 27.52%, 12.71% and 5.15% fluorescence increase in intracellular calcium,respectively,compared with the control group(P<0.01). Moreover, the PCR results showed that the mRNA expressions of Cav1.2, Calm and RyR2 in the myocardial cells treated with H2O2 were increased 2.78,2.26,and 5.34 times as compared with the control group,while Kir6.2 displayed a 1.79-fold expression level(P<0.01). By contrast, the combination of natrin and verapamil significantly decreased the mRNA expression of Cav1.2,Calm and RyR2,compared to the H2O2-treated group(P<0.01). Meanwhile,the expression of Kir6.2 was considerably higher than that of the H2O2-treated group(P<0.05). CONCLUSION Natrin can reduce the intracellular calcium overload of cardiomyocytes induced by H2O2 and shows a protective effect against oxidative damage for cardiomyocytes. The possible mechanism is that natrin can decrease the mRNA expression of Cav1.2,Calm,RyR2 and increase the expression of Kir6.2 of the H2O2-induced cardiomyocytes.

Aim To explore the lipid-lowering mecha-nisms of curcumin from the molecular levels and pro-vide scientific basis for clinical development of lipid-lowering drugs.Methods Using oil red O staining and enzymic to determinate the levels of cholesterol in HepG2 cells.Moreover,uptaking of DiI-LDL was also measured.The expressions of mRNA and protein were detected by RT-Q-PCR and Western blot.Results The red lipid droplets and the levels of TC and FC sig-nificantly increased in HepG2 cells after treated with curcumin.The orange red fluorescence was higher than that of control.Curcumin could promote the expression levels of mRNA and protein of SREBP2 and LDLR, what′s more,curcumin could reduce the expression of the mature PCSK9 level and IDOL protein.Conclu-sion Curcumin accelerates LDL-C uptake probably via downregulating the expression of PCSK9 and IDOL in HepG2 cells.

AIM:To investigate high-density lipoprotein ( HDL) subclass distribution and to analyze the rela-tionship between HDL subclasses with plasma glucose and lipids in metabolic syndrome ( MS) .METHODS:Apolipopro-tein A-I ( apoA-I) contents of plasma HDL subclasses were determined by two-dimensional gel electrophoresis associated with immunodetection .The concentrations of lipids and apolipoproteins in the plasma were measured by an automated bio -chemical analyzer .RESULTS:Compared with the controls , the levels of fasting plasma glucose ( FPG) , total cholesterol (TC), triglyceride ( TG), low-density lipoprotein cholesterol ( LDL-C), LDL-C/high-density lipoprotein cholesterol (HDL-C), apolipoprotein B100(apoB100), apoB100/apoA-I, systolic blood pressure (SBP), body mass index (BMI) and HDL3b were increased in the MS patients (P<0.05).Meanwhile, HDL-C, apoA-I and preβ2-HDL, HDL2a and HDL2b were decreased in the MS patients (P<0.01).With the increase in the plasma glucose level , the contents of HDL2a and HDL2b were decreased in the MS patients (P<0.05), while preβ1-HDL was increased (P<0.05).With the decrease in the HDL-C level, the content of HDL2b was decreased in the MS patients (P<0.01), while preβ1-HDL was increased (P<0.01).With the increase in the TG level and the decrease in the HDL-C level, the content of HDL2b had a decrea-sing trend and the content of small-particle preβ1-HDL had an increasing trend , indicating that HDL maturation metabolism was disrupted.The correlation analysis showed that FPG was negatively correlated with the levels of HDL 2a and HDL2b, HDL-C was negatively correlated with the level of preβ1-HDL and positively correlated with the level of HDL 2b , and TG was positively correlated with the levels of preβ1-HDL and HDL3b .CONCLUSION:With the increases in the plasma glucose and TG, and the decrease in HDL-C in the MS patients, HDL particles have minifying tendency , and the maturation me-tabolism of HDL particles is disrupted .

Aim To explore the effects of niacin on LDL-C uptake and metabolism in HepG2 cells,and to clarify the functions of niacin in lipid-lowering and slo-wing the atherosclerosis process,thus to provide a sci-entific basis for niacin as a lipid-lowering drug in clini-cal development.Methods Oil red O staining was used to observe HepG2 cells after lipid uptake.Enzy-matic method was used to determine the content of in-tracellular free cholesterol (FC)and total cholesterol (TC).The LDLR levels on the surface of cell mem-brane were detected by immunofluorescence flow cy-tometer.The mRNA and protein expressions of LDLR, SREBP2 and PCSK9 were analyzed by qPCR and Western blot.Results The results of oil red O staining showed that the rate of oil red O-positive cells and the number of red lipid droplets were significantly in-creased in niacin group than control group.Niacin sig-nificantly increased the levels of TC and FC in HepG2 cells(P <0.05 ).What’s more,niacin significantly upregulated the expression of LDLR and significantly downregulated the protein expression of PCSK9,while it had no effect on the expression of SREBP2.Conclu-sion Niacin accelerates LDL-C uptake probably via downregulating the expression of PCSK9 and reducing the degradation of LDLR protein in HepG2 cells.

OBJECTIVE: To explore the cause and the methods of reoperation for recurrent thyroid carcinoma. METHOD: The clinicopathologic data of 87 cases were retrospectively analyzed. The diagnosis on recurrent thyroid carcinoma were confirmed after reoperative pathology. RESULT: Forty-three cases (49.4%) were confirmed as residual carcinoma by pathology. Among 87 cases, 65 cases (74.7%) had lymph node metastasis in group VI and 42 cases (48.3%) had lateral neck lymph nodes metastasis, 3 cases were in the presence of recurrent laryngeal nerve injury temporarily, 1 case was in the presence of recurrent laryngeal nerve injury permanently, 5 cases were convulsed by hypocalcemia. CONCLUSION The nonstandard surgical procedure in the first operation is the main cause for the reoperation of thyroid carcinoma. Increased cognitive level of thyroid carcinoma and appropriate surgical technique may be the important keys to avoid reoperating. It is necessary to protect the parathyroid and recurrent laryngeal nerve in reoperation.
Adult ; Aged ; Female ; Humans ; Lymph Nodes ; pathology ; Lymphatic Metastasis ; pathology ; Male ; Middle Aged ; Neoplasm Recurrence, Local ; surgery ; Reoperation ; Retrospective Studies ; Thyroid Neoplasms ; pathology ; surgery ; Young Adult

Objective: To understand lunch satisfaction and leftovers of Changsha compulsory education schools under different supply modes served by school canteens and specialized enterprises,and to provide scientific basis for the government to formulate school lunch improvement policies. Methods: Multistage stratified cluster sampling method was used to random select 2 203 students from 8 primary and secondary schools in Changsha who were administered with questionnair survey in April to May of 2018. Results: For school lunch, the overall rate of satisfaction was 78.8%.The overall lunch satisfaction of female and primany school students were higher than that of male and junior high school students respectively,and the difference was statistically significant(P<0.05). Totally 76.0% of students had the highest satisfaction in food hygiene and the lowest satisfaction rate was 60.0% in food taste. By comparing different supply modes, the overall satisfaction rate of meal quantity was higher (47.8%) under school canteens, and that of dining environment was relatively high (43.7%) under specialized enterprises. "Don-t like some food" (63.8%) was the main reason for students leftovers under the two supply modes. The lunch leftover rate of specialized enterprises (37.8%) was significantly higher than that of school cafeteria (30.6%)(χ 2=12.81，P<0.05). Conclusion The satisfaction of food taste and the rate of lunch leftovers need to be further improved. School canteens environment and management should be strengthened, as well as the flexibility and communication under specialized enterprises and family-school communication. The joint efforts by school and family are needed for healthy eating education.