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Objective: To investigate the effect of silencing sirtuin 3 (Sirt3) on the apoptosis of human ovarian cancer SKOV3 cells induced by resveratrol (Res), and to explore its mechanism of promoting apoptosis. Methods: The human ovarian cancer SKOC3 cells were cultured with different concentrations 0, 2. 5, 5. 0, 10.0, 20.0, 40.0 and 80.0 mg · L-1) of Res for 24 h. The survival rate of cells was measured by MTT assay. The SKOV3 cells were randomly divided into control group, Sirt3 inhibitory 3-1H-1, 2, 3-triazol-4-yl) pyridine 3-TYP group, Res group and 3-TYP+Res group. After 24 h of culture, the inhibitory rates of proliferation of the cells in various groups were detected by MTT assay; the nuclei were stained with Hoechst 33342, and the morphorgy nucleus was observed by laser confocal microscope; reactive oxygen species (ROS) probe was used to detect the intracellular ROS levels; Western blotting method was used to detect the expression levels of Sirt3, Bax, Bcl-2 and cleaved caspase-3 proteins in the cells in various groups. Results: The results of MTT assay showed that the survival rates of SKOV3 cells were significantly decreased with the increase of concentration of Res, and the median inhibitory concentration (IC50) was 42. 73 mg · L-1. Compared with control group, the inhibitory rates of proliferation of cells in Res group and 3-TYP+Res group were significantly decreased (P0.05); the protein expression levels of Sirt3 and Bcl-2 proteins in Res group were significantly decreased (P< 0.05), and the expression levels of Bax and cleaved caspase-3 proteins were significantly increased (P<0.05). Compared with Res group, the expression levels of Bax and cleaved caspase-3 proteins in 3-TYP + Res group were significantly increased (P<0.05), and the expression levels of Bcl-2 and Sirt3 proteins in 3-TYP+Res group were significantly decreased (P<0.05). Conclusion: Res can induce the apoptosis of SKOV3 cells, and the inhibition of Sirt3 expression by 3-TYP can enhance the effect of Res.
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Objective:To observe the effects of myricetin on autophagy and mitochondrial fission in the human ovarian cancer SKOV3 cells,and to explore its induction effect on autophagy and promoting effect on mitochondrial fission.Methods: The SKOV3 cells were cultured in vitro.0,20,40,and 60 g·L-1 myricetin were used in control group and low, middle, high doses of myricetin groups for 12 h.The changes of mitochondrial membrane potential were detected by flow cytometry;the morphology of mitochondria was observed by MitoTracker Red;the expression levels of dynamin related protein1 (Drp1) and fission 1 (Fis1) in various groups were detected by Western blotting method;and the expression levels of autophagy related protein LC3 were detected by both Western blotting method and immunofluorescence method.Results:Compared with control group, the ratios of decreased mitochondria in different doses of myricetin groups were significantly increased(t=3.27, t=6.85, t=5.49,P<0.05).Compared with control group, the numbers of mitochondria in different doses of myricetin groups were increased, and the mitochondria looked more like gravel.Compared with control group,the expression levels of Drp1 in different doses of myricetin groups were significantly increased (t=4.35, t=3.28, t=6.17,P<0.05), and the expression levels of Fis1 were increased also(t=8.32, t=6.74, t=9.27).The immunofluorescence results showed that the expression levels of LC3 in different doses of myricetin groups were significantly increased with the increase of myricetin dose compared with control group.The Western blotting results showed that the ratios of LC3-Ⅱ/LC3-Ⅰ in middle and high doses of myricetin groups were significantly increased compared with control group(t=3.28, t=4.21,P<0.05).Conclusion: Myricetin can induce the autophagy of SKOV3 cells, and it can also promote the mitochondrial fission.
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<p><b>OBJECTIVE</b>To evaluate the application of multidisciplinary treatment (MDT) in patients with liver metastasis of colorectal cancer(CLM).</p><p><b>METHODS</b>Clinical data of 118 patients with liver metastasis of colorectal cancer, including 32 patients with MDT (MDT group) and 86 patients without MDT (control group), from February 2014 to April 2015 in PLA General Hospital were analyzed retrospectively. Compliance of preoperative examination and adjuvant therapy, and efficacy-associated indexes were compared between the two groups.</p><p><b>RESULTS</b>(1) As compared to control group, statistically significant increase in imaging examination ratio was found in MDT group: chest CT [87.5%(28/32) vs. 40.7%(35/86), P=0.0000], abdominal MRI [84.4%(27/32) vs.61.6%(53/86), P=0.019], pelvic MRI [63.7%(7/11) vs. 24.3%(8/33), P=0.017]. The preoperative assessment of TNM staging was also higher in MDT group [100%(32/32) vs. 20.9%(18/86), P=0.0000], while there was no significant difference in accuracy rate of TNM staging between the two groups [81.3%(26/32) vs. 66.7%(12/18), P=0.2465]. (2) Rates of preoperative chemotherapy and chemotherapy completion were also higher in MDT group than those in control group [90.6%(29/32) vs. 62.8%(54/86), P=0.0033; 82.8% (24/29) vs. 57.4% (31/54), P=0.000], but conversion rate of unresectable CLM showed no significant difference [24.0% (6/25) vs. 14.3% (7/49), P=0.299 ]. (3) Rate of one-stage resection or ablation was higher in MDT group compared to control group [76.9%(10/13) vs. 36.0%(9/25), P=0.038], and resection rate of metastasis nidus was also higher in MDT group [77.0%(20/26) vs. 44.9%(13/29), P=0.015]. No significant differences were observed in rates of R0 resection, positive surgical margin, lymph node clearance, ablation of metastasis nidus, pathological complete response, postoperative chemotherapy or postoperative complications (all P>0.05).</p><p><b>CONCLUSION</b>MDT has the advantages on standardization of preoperative examination and perioperative chemotherapy, and can improve the rate of one-stage resection or ablation, as well as resection of metastasis nidus.</p>
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Aged , Female , Humans , Male , Middle Aged , Colorectal Neoplasms , Pathology , Combined Modality Therapy , Hepatectomy , Liver Neoplasms , Therapeutics , Lymph Nodes , Neoplasm Staging , Postoperative Complications , Retrospective Studies , Tomography, X-Ray Computed , Treatment OutcomeABSTRACT
Objective To observe protective effects of allicin on heart and lung in aging mice induced by D-galactose, and try to explore the possible mechanism from the aspect of oxidative stress. Methods Fifty male Kunming mice were randomly divided into 5 groups:normal control group ( group C) ,model control group ( group D) and high-,middle-and low-dose of allicin groups ( H,M,L group) . The rats in group D,L,M and H were injected with D-galactose. At the same time,the rats in group L,M and H were injected with allicin. All of the injection lasted for 6 weeks. After that,athletic ability of the mice was evaluated by behavioral experiments. Malondialdehyde ( MDA ) content, superoxide dismutase ( SOD ) activity and total antioxidant capacity ( T-AOC) in the homogenate of heart and lung tissues were measured,and the expression levels of Bax and Bcl-2 were tested in heart and lung. Results Behavioral experiment showed that standing time on Rota Rod System and continuous running time on mice treadmill were significantly shortened in group D as compared with group C ( P<0.05) ,but those were prolonged in the allicin groups. Compared with group C,MDA content in homogenate of myocardium and lung tissues was significantly increased in group D (P<0.05),the activity of SOD was decreased (P<0.05) and T-AOC was decreased (P<0.05) . As compared with group D,MDA content in allicin groups was significantly decreased ( P<0.05) ,SOD activity increased (P<0.05) and A-TOC increased (P<0.05) in a dose-dependent manner. The results of immunohistochemistry showed that the expression of Bax was significantly increased in group D as compared with group C,and the expression of Bcl-2 was decreased. After the intervention of allicin,expression of Bax was decreased in group L,M and H as compared with group D, and expression of Bcl-2 was increased as compared with group D. Expression levels of Bax and Bcl-2 in lung tissues showed the same changing trend. Conclusion Allicin has a potential protect role on heart and lung in D-galactose-induced aging mice by increasing athletic ability,decreasing oxidative stress and decreasing cell apoptosis of myocardium and lung tissues.
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OBJECTIVE To observe the effect of the autophagy and endoplasmic reticulum stress (ERS) in vascular smooth muscle cells (VSMCs) with hydrogen peroxide (H2O2). METHODS The VSMCs were incubated with different concentrations of H2O2(50, 100, 200, 400, 600, 800, 1200 and 1600 μmol · L-1)for 12 and 24 h. The cell viability was determined by MTT assay. The cell morphology was observed under an inverted phase contrast microscope. The expression of autophagy related protein ubiquitin binding protein p62 and microtubule-associated protein light chain 3(LC3)was detected by indirect immunofluorescence. Western blotting was used to detect autophagy related protein human coiled-coil myosin-like BCL2-interacting protein (Beclin-1),LC3 and mammalian target of sirolimus Rapamycin(mTOR),as well as the expression of endoplasmic reticulum stress(ERS)related protein glucose regulated proteins 78 ku(GRP78)and C/EBP homologous protein(CHOP). RESULTS MTT results showed that H2O2 inhibited the growth of VSMCs cells. The half inhibitory concentration (IC50) was 597.2±2.3 and(447.4±1.7)μmol·L-1 at 12 and 24 h,respectively. The results of the inverted phase contrast microscope showed that VSMCs in H2O2 group shrinked and turned into smaller round cells. The cell survival rate declined from(97.5 ± 0.1)% in normal control group to(74.4 ± 1.0)% and(56.8 ± 0.9)% in H2O2 400μmol·L-1 at 12 and 24 h, respectively. The results of the laser scanning confocal micro?scope showed that H2O2 400 μmol · L- 1 increased the expression of LC3 and p62 protein in a cytoplasmic time-dependent manner, and increased the colocalization of LC3 and p62,especially at 8 h. The results of Western blotting demonstrated that H2O2 increased the expression of ERS related protein GRP78 and CHOP,autophagy related protein Beclin-1 and LC3Ⅱ/LC3Ⅰ(P<0.01),and decreased mTOR(P<0.01)in VSMCs. CONCLUSION H2O2 induces autophagy through ERS in VSMCs.
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Objective To evaluate the effects of laparoscopic radical resection of mid-low rectal cancer on sexual and urinary functions of male patients. Methods The clinical data of 150 patients with mid-low rectal cancer who were admitted to the PLA General Hospital from May 2006 to March 2009 were retrospectively analyzed. Sixty-eight patients were allocated to laparoscopic group and 82 to open group. The incidences of erectile and ejaculatory dysfunction and the short- and long-term urinary dysfunction of patients in the 2 groups were compared seperately at 6 and 12 months after the operation. All data were analyzed using the chi-square test. Results The incidences of erectile and ejaculation dysfunction at 6 months after operation, incidence of ejaculation dysfunction at 12 months after operation, and long-term urinary dysfunction were 15% (10/68), 16% (11/68), 10% (7/68) and 0 in the laparoscopic group, and 22% (18/82), 23% (19/82), 21% (17/82) and 2% (2/82) in the open group, respectively, no significant difference between the two groups was found (x2 = 1. 285, 1. 137, 3. 013, 1.681, P>0. 05). The incidences of erectile dysfunction at 12 months after operation and short-term urinary dysfunction were 7% (5/68) and 4% (3/68) in the laparoscopic group, and 17% (14/82) and 20% (16/82) in the open group, respectively, a significant difference between the two groups was observed (x = 4. 565, 5.930, P <0.05). Conclusion Laparoscopic radical resection of mid-low rectal cancer can reduce the injury of pelvic autonomic nerve and improve the life quality of patients.
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The first few cases of colonic surgery using Da Vinci surgical system were reported in 2002;since then,Da Vinci surgical system has gradually been used in several centers for rectal cancer and with favorable outcomes.Laparoscopy has opened a new era in modern surgery,however,the inherent limitations of traditional laparoscopic surgery may cause certain difficulties during manipulation,especially in the demanding field of colonic laparoscopic surgery,which prolonged the learning curve.The advantages of Da Vinci surgical system include stable camera platform,three-dimensional imaging,excellent ergonomics,tremor elimination,ambidextrous capability,motion scaling,and instruments with multiple degrees of freedom.Low rectal region was regarded as the"forbidden zone"for laparoscopy,so we applied the Da Vinci surgical system in low anterior resection for rectal cancer.Because of mulyiquadrant operations in low anterior resection of rectal cancer,moving the robotic cart twice during the operation is necessary,which increased the operation time.In order to solve the problem,many surgeons use conventional laparoscopy for vessel ligation and flexure mobilization,and adopt the Da Vinci surgical system only in the lower quadrant of the abdomen.We present a technique that allows for the complete isolation of the mesorectum from the same position of the robotic cart,during the process,the enhanced dexterity and precise dissection offered by the Da Vinci surgical system were fully utilized.
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Objective This thesis discusses the present situation of related thesises of childhood asthma.Methods The childhood asthma related thesises in Chinese Scientific Journals Database from 1999 to 2008 were collected as the basic data.Results 2 246 authors from 31 province/city/autonomous region who published 3 121 thesises in 507 periodicals were found.Conclusions The children's hospital of the capital institute of pediatrics is the authority researcher of childhood asthma.