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Colorectal cancer is the third leading cause of cancer death worldwide and is characterized by frequent genetic mutations. Current chemotherapy, radiation, and surgical treatment options face challenges such as cancer recurrence and drug resistance. Treatment of colorectal cancer is often achieved by promoting various forms of programmed cell death. Iron death has been found to be an iron-dependent and lipid peroxide-driven form of programmed cell death. Studies suggest that iron death is an effective therapeutic strategy for colorectal cancer. However, a deeper understanding of the mechanisms of iron death onset, propagation, and drug resistance in colorectal cancer is needed. In this review paper, the mechanisms of iron death and its drug resistance pathways in colorectal cancer formation, metabolism, and treatment were reviewed, and future research directions were prospected to improve the treatment options for colorectal cancer.
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Objective:To detect the expression of replication factor C4(RFC4) in pancreatic ductal adeno-carcinoma, and to explore the clinical prognosis of RFC4 and pancreatic ductal adenocarcinoma. To explore the possibility of RFC4 as a potential biomarker for pancreatic ductal adenocarcinoma.Methods:The mRNA level of RFC4 in pancreatic ductal adenocarcinoma and normal tissues adjacent to the cancer was analyzed by bioinformatics methods, and the relationship between its expression and the survival rate of patients with pancreatic ductal adenocarcinoma was analyzed. The clinicopathological data of 76 patients with pancreatic ductal adenocarcinoma who underwent surgical treatment were retrospectively analyzed. Immunohistochemical method was used to detect the expression level of RFC4 protein in pancreatic ductal adenocarcinoma tissue and normal tissues adjacent to the cancer, and to analyze its relationship with clinicopathological characteristics of patients with pancreatic ductal adenocarcinoma.Results:The results of bioinformatics analysis showed that RFC4 mRNA was significantly highly expressed in pancreatic ductal adenocarcinoma tissue, and was significantly correlated with the overall survival rate ( P=0.046) and disease-free survival rate ( P=0.042) of the patients. Immunohistochemical results showed that the expression of RFC4 in pancreatic ductal adenocarcinoma tissue was significantly higher than that in normal tissues adjacent to the cancer. The high expression of RFC4 in pancreatic ductal adenocarcinoma tissue was related to tumor size ( P=0.043), but not related to age, gender, and tumor grade (all P>0.05). Conclusions:RFC4 is highly expressed in pancreatic ductal adenocarcinoma tissues and indicates a poor prognosis, and its expression level is related to the tumor stage of pancreatic ductal adenocarcinoma. RFC4 may serve as a new prognostic predictor for pancreatic ductal adenocarcinoma.
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Objective:To detect the expression of microchromosome maintenance protein 4 (MCM4) in pancreatic ductal adenocarcinoma, and to explore the clinical prognosis of MCM4 and pancreatic ductal adenocarcinoma. To explore the possibility of MCM4 as a potential biomarker for pancreatic ductal adenocarcinoma.Methods:The mRNA level of MCM4 in pancreatic ductal adenocarcinoma and normal tissues adjacent to the cancer was analyzed by bioinformatics methods, and the relationship between its expression and the survival rate of patients with pancreatic ductal adenocarcinoma was analyzed. The clinicopathological data of 76 patients with pancreatic ductal adenocarcinoma who underwent surgical treatment were retrospectively analyzed. Immunohistochemical method was used to detect the expression level of MCM4 protein in pancreatic ductal adenocarcinoma tissue and normal tissues adjacent to the cancer, and to analyze its relationship with clinicopathological characteristics of patients with pancreatic ductal adenocarcinoma.Results:The results of bioinformatics analysis showed that MCM4 mRNA was significantly highly expressed in pancreatic ductal adenocarcinoma tissue, and was significantly correlated with the overall survival rate and disease-free survival rate of patients (all P<0.05). Immunohistochemical results showed that the expression of MCM4 in pancreatic ductal adenocarcinoma tissue was significantly higher than that in normal tissues adjacent to the cancer. The high expression of MCM4 in pancreatic ductal adenocarcinoma tissue was related to tumor size ( P=0.038), but not related to age, gender, and tumor grade (all P>0.05). Conclusions:MCM4 is highly expressed in pancreatic ductal adenocarcinoma tissues and indicates a poor prognosis, and its expression level is related to the tumor stage of pancreatic ductal adenocarcinoma. MCM4 may serve as a new potential biomarker for pancreatic ductal adenocarcinoma.
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Mucin is widely expressed in various tissues and organs.The abnormal expression of mucin can be found in many digestive system malignancies,which may be related to the Wnt signaling pathway.Mucins 1 and 4 can promote the occurrence,development and malignancy of various digestive system cancers,and even promote tumor invasion and metastasis.The expression levels of Mucin 2 in different types of tumors are different,and the high or low expression has different role in tumor promotion and inhibition.Mucin 15 is abnormally lowly expressed in digestive system cancers,which involves in tumorigenesis and development as well as invasion and metastasis.Mucins 3,5 and 6 are also more closely related to digestive system cancers.In this paper,the research progress on the relationship between mucins and digestive system cancers was reviewed.
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The activation of p21 kinase 2 (PAK2) has a certain value in cancer research, since its participation in a series of intracellular biological activities. There is a relatively little research on its relationship with the development of tumors. PAK2 can be activated by a variety of upstream signals, especially small G protein Rho family of Rac and Cdc42, and it participates in a variety of important signaling pathways and cell function regulation. Abnormal expression of PAK 2 has been reported in various tumors, which involves in cytoskeletal remodeling, cell motility, apoptosis, signal transduction, gene transcription, translation and angiogenesis. Therefore, PAK2 plays an important role in tumor occurrence and development. The study on PAK2 and the targeting therapy for anti-PAK2 provides a new sight on the treatment and prevention of tumor.
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Objective To investigate the experience of diagnosis and treatment of abdominal penetrating injury with large vessels damage.Methods The clinical data of 18 patients with abdominal large vessels injuries in our hospital from Jan 2003 to oct 2014 were analyzed retrospectively.Results 18 cases of large vessels injuries,accounting for 16.21％ during the same period of all penetrating wounds (18/111),emergency laparotomy was performed.There were 8 cases of arterial injury,4 cases of concurrent arteriovenous injury,6 cases of venous injury,Arterial and venous broken walls were repaired,splenic artery and venous ligation and splenectomy were performed.Vascular repair success rate was 100％,Intraoperative blood loss was 500-6 000 ml,average (3 750 ±670) ml.Operating time varied from 2.5 to 7 h,average (3.9 ±0.8) h.All patients were cured.12 cases were followed-up for 2-36 months,mean follow-up time was (15 ± 7) months,ultrasonography showed normal blood flow without complications.Conclusions Emergency surgical exploration and limited fluid resuscitation is the most effective therapy in abdominal penetrating injury involving large vessels.
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Objective To evaluate the role of damage control surgery (DCS) in the diagnosis and treatment of sharp abdominal injury combined with multiple trauma.Methods Sixty patients with sharp abdominal injury accompanied by multiple trauma treated from January 2005 to August 2014 were reviewed retrospectively.There were 55 males and 5 females,aged at 15-79 years (mean,32.08 years).Thirty patients underwent definite operative treatment (control group),and 30 patients had DCS (DCS group).Between-group differences were examined in pre-and post-operative hemodynamic changes,function recovery,cure rate and complication incidence.Results All patients showed improved hemodynamic parameters after operation.The cure rate was 97％ (29/30) in DCS group versus 50％ (15/30) in control group (P ＜ 0.05).Complications were reported in 17％ (5) of the patients in DCS group versus 40％ (12) of the patients in control group (P ＜ 0.05).Conclusion DCS is associated with decreased rate of complications and increased cure rate in the treatment of sharp abdominal injury combined with multiple trauma.
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The complete genome sequence of transmissible Gastroenteritis virus (TGEV) strain TS, previously isolated from Gansu province, was cloned and compared with published sequence data from other TGEV strains.Phylogenetic tree analysis based on the amino acid and nucleotide sequences of the S gene showed that the TGEV strains were divided into 3 clusters. TGEV TS showed a close evolutionary relationship to the American Miller cluster but had a 5' non-translated region (NTR) sequence closely related to the American Purdue cluster.Continued culture in different cell types indicated that TGEV TS virulence could be attenuated alter fifty passages in Porcine kidney (PK-15) cells, and that the Porcine kidney cell line IB-RS-2 (IBRS) was not suitable for culture of the TGEV strain TS.
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The structure genes spike (S), nucleocapsid (N), membrane (M), small membrane (sM) of a porcine epidemic diarrhea virus (PEDV) strain DX isolated in Gansu province, North-west of China, were cloned, sequenced and compared with published sequences of PEDV strains. The nucleotide sequences encoding the entire S, sM, M and N genes open reading frame (ORF) of DX were 4 152, 231, 681 and 1 326 bases long respectively. There were transcription regulatory sequences (TRSs) upstream of the initiator ATG of the S, N and M genes. The amino acids sequences of S, M and N contained 30, 3 and 7 potential asparagine (N)-linked glycosylation sites. Homologous analysis and phylogenetic trees showed that DX had the closest relationship with strains LJB/06, JS-2004-2Z and CH/HLJH/06 that were also isolated from China and indicated the prevalence of some PEDV isolates in China were widespread since the JS-2004-2Z strain originated from the south of the China, and LJB/06 and CH/HLJH/06 were isolated from northeast China. The N gene was cloned using two primers which contained Nco I and BamH I restriction enzyme sites and subcloned into expression vector pET30a. The recombinant plasmid was then transformed into E.coli Rossta. SDS-PAGE showed there was a protein of about 55kDa as expected and Western blot indicated the N protein had biological activity.
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AIM: To investigate the effects of intermittent hypoxic exposure and normoxic convalescence on the parameter of erythrocyte and serum hypoxia inducible factor1 alpha (HIF-1α) and erythropoietin (EPO)levels. METHODS: Rat models of intermittent hypoxic exposure were established, combined with the clinical research on volunteers experiencing the intermittent plateau work. Blood samples for red blood cell (RBC) counts, hemoglobin (Hb) and hematocrit (HCT) were collected, serum HIF-1α and EPO levels were measured using enzymelinked immunosorbentassy. RESULTS: RBC counts, Hb concentration and HCT were significantly higher than the normoxic group (P < 0.05), after exposure of rats to hypoxia from 7 to 28 days. Compared with the normoxic group, serum HIF-1α levels were higher in the group of IH3, 7, 14 days, and EPO had a corresponding increase in the group of IH3, 7 days. Then, a decrease was observed in parameter of erythrocyte and serum HIF-1α and EPO levels after 14 days normoxic convalescence treat. In volunteers studies, RBC counts in 8 monthes group and Hb concentration in 2 years group were significantly higher than the plain group (P < 0.05). The change of HCT was nearly the same as RBC, and HCT in 2 years group was higher than the plain group (P < 0.05). Compared with the plain group, EPO had no significant differences in any of plateau group. CONCLUSION: Intermittent hypoxic exposure can enhance serum hypoxia inducible factor-1 alpha and erythropoietin levels and the generation of red blood cells, which leads to an increase in hemoglobincon concentration and hematocrit. The results have changed with the hypoxic exposure period prolonged. Normoxic convalescence after intermittent hypoxic exposure can make the related indexes reduced, and contribute to the organism recovery.
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Objective To investigate the diagnostic value of EUS with miniprobe on upper gastrointestinal tract mesenchymal tumor(GIMT).Methods The EUS features of 38 patients with GIMT who underwent EUS with miniprobe were studied retrospectively,and the results were compared with the postoperative pathological findings.Results Among 38 GIMT cases detected by EUS,there were 25 cases of gastrointestinal stromal tumor,11 cases of leiomyoma,and 2 cases of leiomyosarcoma.Postoperative histopathological and immunohistochemical examinations confirmed 28 cases of stromal tumor.In which 6 cases were high-risk GIST,8 cases were leiomyoma,1 case was leiomyosarcoma,and 1 case was neurofibroma.The accuracy of diagnosis with EUS was 89%.Conclusion EUS is an accurate method in diagnosis of submucosal tumors,which can make better differentiation diagnosis between GIMT and other submucosal tumors.
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Objective To study the efficacy and clinical value of pulmonary surfactant on premature infant's hyaline menbrace disease.Methods Nineteen high risk premature infant's were received tratment of PS hy injected into trachea in 5 minutes of life at dose of 100mg/kg and were compared with twenty-one cases of same condition,contrasted group received treated without pulmonary surfactant injected.Results The clinical symptoms and results of blood gas analysis in prevented group were improved.The time of inhaled oxygen and mechanical ventilation,and the time of inpatient in prevented group were significantly shorter than the contrasted group(P
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Objective To study the role of Lugol staining for detecting early esophageal cancer and precancerous lesions.Methods 2% Lugol solution was adopted to stain esophageal mucosa in 45 cases with esophageal suspicious lesions,observed and multiple biopsies were taken for pathological study.Results Thirty-nine cases were light or non-stained among the 45 cases with Lugol staining.Which revealed 8 esophageal cancers(5 early cancer,3 advanced cancer),5 Barrett esophagus,,11 mild-moderate dysplasias.The rate of detecting early esophageal cancer and precancerous lesions with Lugol staining was 46.7%.Conclusion Lugol staining is helpful for diagnosis of early esophageal cancer and precancerous lesions,and it is simple in operating.The role of Lugol staining in detecting early esophageal cancer and precancerous lesions has important clinical value.
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AIM: To investigate the effects of angiotensin-Ⅱ (Ang-Ⅱ) on the proliferation and collagen synthesis in rat cardiac fibroblasts and the expression of Ang-Ⅱ receptor on fibroblasts. METHODS: [3H]-TdR and [3H]-prolin at different concentrations were incubated with the confluent fibroblasts of newborn rats stimulated by Ang-Ⅱ. Receptor of Ang-Ⅱ on fibroblasts and intracellular free calcium ions were examined by autoradiograms and fluorescence technique. RESULTS: In the presence of Ang-Ⅱstimulation, the increase in incorporation of [3H]-TdR and [3H]-prolin was much higher than that of control in a dose-dependent manner. Autoradiograms showed that Ang-Ⅱ was uniformly distributed over the membrane of the fibroblasts. The silver grains on fibroblasts were obviously decreased after adding unlabeled Ang-Ⅱ by the autoradiograms. The concentration of free calcium ions was increased in fibroblast. CONCLUSION: These findings suggest that Ang-Ⅱ promotes fibroblast proliferation and the syntheses of collagen protein, in which Ang-Ⅱ binds to the membrane receptor of fibroblasts to activate the signal system in cells, such as intracellular free calcium ions. [