Objective To evaluate the effect of recombinant human growth hormone(rhGH) on growth of human colonic cancer cells (COLO-320) in vitro. Methods Human COLO-320 cells in logarithm growing period were cultured for 24 h,48 h or 72 h with variant concentrations of rhGH,camptothecine (CPT) or rhGH combined CPT in calf serum(serum group) or calf serum-free (serum-free group). Light density of cells were determined by MTT method, so that cellular inhibition rate were calculated.Results No influence on cell growth or inhibition rate was observed from cultures with variant concentrations and different acting times of rhGH (P＞0.05). Inhibition rate of single CPT or CPT combined rhGH were much more increased than single rhGH used (P＜0.01) with no statistical significance (P＞0.05).Conclusion The results show that rhGH has neither direct COLO-320 cells stimulation nor any evidence of COLO-320 cells inhibition, and has no influence of CPT on COLO-320 cells inhibition in vitro.
ObjectiveTo detect 5-FU concentration and investigate the changes of pathology， and Ki-67 protein expression after intraoperative regional chemotherapy (RC) for colon cancer. MethodsAll the patients were randomized into two groups: RC group (n=20), received intraoperational RC with 100 ml physiological saline contained 5-FU (15 mg/kg) and camptothecine (0.06 mg/kg)； control group (n=20), saline alone. The samples from portal vein blood, peripheral blood, peritoneal fluid， and peri-cancerous tissues in RC group were taken to detect the 5-FU concentration by high performance liquid chromatography (HPLC), respectively at 2, 5, 10, 20, 30, and 60 minutes after treatment. The pathological changes were observed and Ki-67 protein expressions were examined by immunohistochemical staining for all the cancer tissues postoperatively in two groups. ResultsPeak concentration of 5-FU appeared at 2 min after treatment, and decreased gradually. 5-FU concentration in peritoneal fluid was the highest, and the lowest in the peripheral blood (Plt;0.01). In RC group， light karyopyknosis, nuclear swelling, and coagulative necrosis of cancer cells, and light intercellular substance hydropsia, inflammatory cells invasion were observed under light microscopic examination; light vasculitis presented also in five cases. Nuclear swelling, heterochromatin agglutination, perinuclear gap expansion, mitochondrial swelling, endoplasmic reticulum expansion, and Golgi complex expansion were observed with transmission electron microscope. Ki-67 protein expression of colon cance tissues in RC group was lower than that in control group （Plt;0.05）. Conclusions Intraoperative RC for colon cancer may sustain a high concentration of chemotherapy drugs in peritoneal fluid and portal vein blood, and alter histopathological morphology of cancer cells, and suppress Ki-67 protein expression. So, intraoperative RC may play an important role in preventing intraoperative spreading and postoperative recurrence of colon cancer.
The results of 2389 patients exmained by colonofiverscope in past nine years are reported. Polyps were found in 561 cases, including 1256 polyps in the large intestine and 82 polyps in the terminal ileum. All 1299 polyps were removed with biopsy forceps. Pathology demonstrated that there were 406 adenomas, including 89 atypical hyperplasia and 23 cases with malignant change and 932 non-canerous polyps with 102 atypical hyperplasia. Since adenoma is seen to be a precancerous change, the polypectomy by colonofiberscope , ecpecially atypical hyperplastic polyps may decrease morbidity of large intestinal cancer. Cancer associated with adenoma may be as high as 51.28%, so the recrudescence of polyps may possibly be found even afer the cancer removal. These data showed that an early discovery of small malignant adenoma is key to improve efficiency.
【Abstract】ObjectiveTo investigate the inhibitory effects of somatostatin analogue (SSTA) on the colonic carcinoma cell growth in vitro and in vivo and its possible mechanism. MethodsThe somatostatin receptor type Ⅱ (SSTR2) mRNA of colonic carcinoma cell line HCT116 was detected by using RTPCR and hybridization in situ. The effects of octreotide (Oct) or NC-8-12 (specific agonist of SSTR2 ) on the proliferation of HCT116 was measured with MTT after HCT116 stimulated by insulin or epidermal growth factor (EGF) and incubated with Oct or NC-8-12 simultaneously for 24 hours. The expression of cyclin D1 was detected with flow cytometry. The HCT116 were implanted in nude mice subcutaneously and treated with Oct or NC-8-12. The tumor volume and tumor weight were measured according to schedule. Results①SSTR2 mRNA was detected in HCT116 and the tumor implanted in nude mice; ②Insulin and EGF increased the proliferation of HCT116 significantly, and this proliferation could be inhibited by Oct and NC-8-12 partially; ③Insulin increased the Cyclin D1 expression of HCT116, its level decreased slightly when treated with Oct or NC-8-12 but not significantly (Pgt;0.05); ④The weight and volume of implanted tumor in nude mice treated with Oct or NC-8-12 showed no significant difference compared with the control group (Pgt;0.05). ConclusionBoth Oct and NC-8-12 could inhibit the proliferation of colonic carcinoma cell line HCT116 in vitro, which indicated that SSTR2 may mediated the inhibition. Oct and NC-8-12 have no effect on the growth of implanted HCT116 in nude mice in this experiment.
ObjectiveTo investigate healing of rat colonic anastomoses after early postoperative intraperitoneal chemotherapy (EPIC).MethodsFortyfive Wistar rats with colonic anastomoses were divided randomly into 3 groups (15 rats each). From postoperative 1 day to 5 day, rats were injected with normal saline (NS) to the peritoneal cavity with 20 ml/(kg·d) for the NS group; 5Fu with 20 mg/(kg·d) for the 5Fu group; 5Fu with 20 mg/(kg·d) and leucovorin with 10 mg/(kg·d) for the 5Fu+LV group. On the 7th postoperative day, rats were killed and the anastomoses were evaluated whether anastomotic complications (leakage or dehiscence) occurred, the anastomotic bursting pressure (ABP) and hydroxypoline content (HPC) were measured. ResultsIn the NS group, 1 rat had incision dehiscence, another one had anastomostic leakage with but no death. In the 5Fu+LV group, 2 rats showed anastomotic leakage and 1 death. On the 7th postoperative day, the ABP in NS, 5Fu and 5Fu+LV groups were (169.1±32.6) mm Hg, (116.8±25.5) mm Hg and (154.9±31.2) mm Hg respectively; the HPC was (1.54±0.28) μg/mg, (0.9±0.33) μg/mg and (1.24±0.29) μg/mg respectively. Both the ABP and HPC, in the NS group were much significantly higher than in 5Fu group (P＜0.01). Both the ABP and HPC in the 5Fu+LV group were significantly higher than which in the 5Fu group (P＜0.05).ConclusionEPIC with 5Fu significantly impairs healing of the colonic anastomosis. 5Fu combined with LV for EPIC might reduce this inhibition to the process of the anastomotic healing.
Objective To analyse the clinico-pathological characteristics of young patients with colorectal cancer. Methods From January 1980 to January 2000, among 1 030 patients with colorectal cancer admitted for surgical treatment, 143 (13.9%) patients were ＜35 years of age. The clinicopathological data of these young patients were reviewed and compared with those of patients in the other age groups. Results In this series of young patients, males were predominat. Most of them were with poorly differentiated (37.8%) and muco-cellular (29.6%) adenocarcinoma. The mast common gross morphology was infiltrating type (56.6%) and colloid carcinoma type (31.5%). The majority of patients (89.5%) were in Dukes stage B and stage C. Conclusion The prognosis of young patients with colorectal cancer surgically treated is worse, due to the fact that most of them are in late stage and their cancers are worse in differentiation. To increase the awareness of cancer in the young is important for early diagnosis and treatment and better prognosis.
Objective To investigate the value of bronchial mucosa biopsy and quantitative culture in the differential diagnosis of lower airway bacterial colonization and infection. Methods A prospective observational cohort survey onMDR Pseudomonas aeruginosa and Acinetobacter baumannii was carried out in intubed or tracheotomized patients with invasive ventilation in respiratory intensive care unite ( RICU) . A total of 50 ICU patients were followed for the detection of MDR pathogen colonization or infection from June 2008 to October 2009. All subjects were divided into an infection group and a colonization group according to the outcome of patients discharged fromthe RICU. Baseline information, APACHEⅡ scores, and CPIS scores were recorded on individual forms for each patient untill discharge or death. Bronchial mucosa biopsy was conducted on appropriate time to identify whether the patient was comfirmed as infection. Microbiological diagnosis was performed with quantitative culture. Results Fifty patients were enrolled in this study, of which infected in 23 cases and colonized in 27 cases. The time of invasive mechanical ventilation, length ofICU stay, catheter indwelling time, and the kinds of disease were significantly different between the two groups( P lt; 0. 05) . The kinds of using antibiotics before onset of multi-drug resistance of bacteria showed that cefoxitin/ cefmetazole and mezlocillin also had significant difference between the infection group and the colonization group. The results of dynamic CPIS score of the infection group showed that scores at each timepoint were higher than those in the colonization group. However, the results of t-test showed that there was higher score in the infection group than that in the colonization group on 14 days after intubation ( P lt;0. 05) . The bronchial mucosa biopsy showed that airway inflammation was detected in 19 cases in the infection group and 9 cases in colonization group. The positive rate in the infection and the colonization group were 55. 6% and 25. 0% , respectively assessed by traditional threshold of 103 cfu/mL for PSB in quantitative bacterial culture. In addition, there was more inflammatory cells in the patients with drug-resistant pathogens infection than that in the patients without nosocomial infection. The combination of bronchial mucosa biopsy and microorganism quantitative cultures had the highest sensitivity and specificity and the highest diagnostic accuracy. Conclusions Bronchial mucosa biopsy combining microorganism quantitative culture is feasible in identifying colonized or infected bacteria. Invasive mechanical ventilation time, length of ICU stay and the catheter indwelling time extending are risk factors for bacterial colonization.
Objective To explore the expressions of caudal-related homeodomain transcription factor-2 （CDX-2）and tumor suppressor gene KAI-1 in colon carcinoma tissues and to analyze their clinical significances. Methods Immu-nohistochemical SP method was used to detect the expressions of CDX-2 and KAI-1 in 50 cases of colon carcinoma tissues and corresponding adjacent tissues （from cancer tissue ≤2cm） and 25 cases of normal colon mucosa tissues. The relation-ships of the expressions of CDX-2 and KAI-1 to the clinicopathologic features were analyzed. Results ①The positive rates of CDX-2 expression and KAI-1 expression in the colon carcinoma tissues were significantly lower than those in the normal colon mucosa tissues 〔CDX-2：34% （17/50） versus 88% （22/25）， P＜0.05；KAI-1：30% （15/50） versus 92% （23/25）， P＜0.05〕 and adjacent tissues of colon carcinoma 〔CDX-2：34% （17/50） versus 54% （27/50）， P＜0.05；KAI-1：30% （15/50） versus 58% （29/50）， P＜0.05〕， which in the adjacent tissues of colon carcinoma were significantly lower than those in the normal colon mucosa tissues （P＜0.05）. ②The positive expressions of CDX-2 and KAI-1 were related to lymph node metastasis， depth of invasion， and degree of tumor differentiation （P＜0.05）. ③Spearman rank correl-ation analysis showed that the CDX-2 expression was positively correlated with KAI-1 expression （rs=0.544， P＜0.01）. Conclusions CDX-2 and KAI-1 may be closely related to the development， invasion， metastasis， and prognosis of colon carcinoma， the combination of CDX-2 and KAI-1 in evaluation of their function has a certain guiding significance in the treatment for colon carcinoma.
Objective To evaluate the effect of visual and audiovisual distraction on anxiety and acceptance levels among patients undergoing colonoscopy. Methods A total of 180 consecutive patients undergoing colonoscopy were randomly divided into three groups: group A received visual distraction; group B received audiovisual distraction; and group C received routine care alone. Levels of anxiety and willingness to accept the same intervention if the procedure needed to be repeated were compared among the three groups. Results The reduction of anxiety score after colonoscopy in group A and group B was greater than that in group C, but the difference was not statistically significant. The rate of willingness to accept the same intervention if the procedure needed to be repeated was significantly different among the three groups: the rates for group A and group B were higher than for group C (Plt;0.05). Conclusions Both visual distraction and audiovisual distraction can significantly improve patients’ acceptance of colonoscopy. Visual distraction and audiovisual distraction have no significant effect on reducing anxiety.
ObjectiveTo explore the expressions of polo-like kinase 1(PLK1) and serine/threonine kinase 15 (STK15) mRNA and protein in colon cancer cells, and to explore the inhibitive effect of SBE13 and VX-680 for PLK1 protein and STK15 protein. MethodsOne kind of cervical cancer cells(Hela cells) and 3 kinds of colon cancer cells (HCT-116 cells, HT-29 cells, and CACO-2 cells) were selected for experiment. Expression levels of PLK1 mRNA, STK15 mRNA and its protein of 4 kinds of cells were detected by reverse transcription polymerase chain reaction(RT-PCR) and Western blot method respectively. Inhibitive effect of SBE13 and VX-680 were evaluated in vitro by methylthiazolyldiphenyl-tetrazolium bromide(MTT) assay in 4 kinds of cells, which divided into 5 groups, receiving Dulbecco's modification of Eagle's medium(DMEM), dimethylsulfoxide(DMSO), SBE13, VX-680, and SBE13+VX-680 respectively. ResultsCompared with Hela cells, expression levels of PLK1 mRNA, STK15 mRNA and its protein in HCT-116 cells,HT-29 cells, and CACO-2 cells were higher(P<0.05). ① Hela cells:Compared with DMEM group, the proliferative activity were not inhibited in SBE13 group, VX-680 group, and SBE13+VX-680 group(P>0.05). ② HCT-116 cells and HT-29 cells:Compared with DMEM group, the proliferative activity were inhibited in VX-680 group and SBE13+VX-680 group(P<0.05), but was not inhibited in SBE13 group(P>0.05). ③ CACO-2 cell:Compared with DMEM group, the proliferative activity were inhibited in SBE13 group, VX-680 group, and SBE13+VX-680 group(P<0.05). ConclusionsExpression levels of PLK1 mRNA, STK15 mRNA and its protein increase in HCT-116, HT-29, and CACO-2 cells compared with Hela cells. SBE13 and VX-680 can inhibit PLK1 and STK15 protein partly in colon cancer cell lines.