Objective To analyze the advances of cancer stem cell (CSC) in recent years, and to propose a prospect for CSC research and cancer therapy. Methods Articles about important advances of CSC theory and cancer therapy were reviewed, and then selected and summarized. Results In 2001, CSC was first put forward as a concept, till now, which has been confirmed in many tissues. In recent years, efforts were dedicated to such topics including: identification of CSC in sol id tumors, the origin of CSC, its niche and growth mechanism, cancer therapy, etc. According to the CSC theory, traditional therapeutic methods have deficiencies, and new treatment targeting CSC may thoroughly el iminate tumors. Conclusion At present, CSC theory is still controversial, while it proposed revolutionary methods and directions for the therapy of cancer.
ObjectiveTo analyze the relation between the place of residence of patients with colorectal cancer (CRC) and patient compliance or regimen decision-making or outcomes for neoadjuvant therapy (NAT) in the current version of the Database from Colorectal Cancer (DACCA). MethodsThe version of DACCA selected for this analysis was updated on June 29, 2022. The patients were enrolled according to the established screening criteria and then assigned into inside and outside of Sichuan Province groups as well as inside and outside of Chengdu City groups. The differences in the patient compliance or regimen decision-making or outcomes (changes of symptom and imaging, and cancer marker carcinoembryonic antigen) for NAT were analyzed. ResultsA total of 3 574 data that met the screened criteria were enrolled, 3 142 (87.91%) and 432 (12.09%) were inside of Sichuan Province group and outside of Sichuan Province group, respectively; 1 340 (42.65%) and 1 802 (57.35%) were inside of Chengdu City group and outside of Chengdu City group in Sichuan Province, respectively. ① The constituent ratios of the patient compliance for NAT had no statistical differences between the inside and outside of Sichuan Province groups (χ2=0.299, P=0.585) as well as between the inside and outside of Chengdu City groups (χ2=3.109, P=0.078). ② In terms of the impact of the place of residence on the decision-making of NAT: For the patients with targeted therapy or not, there was a statistical difference between the inside and outside of Sichuan Province groups (χ2=5.047, P=0.025), but which had no statistical difference between the inside and outside of Chengdu City groups (χ2=0.091, P=0.762); For the patients with radiotherapy or not, there were no statistical differences in the constituent ratios of patients between the inside and outside of Sichuan Province groups as well as between the inside and outside of Chengdu City groups (χ2=2.215, P=0.137; χ2=2.964, P=0.085); For the neoadjuvant intensity, there was a statistical difference between the inside and outside of Sichuan Province groups (χ2=12.472, P=0.002), but which had no statistical difference between the inside and outside of Chengdu City groups (χ2=2.488, P=0.288). ③ The outcomes for NAT: The changes of carcinoembryonic antigen had no statistical differences between the inside and outside of Sichuan Province groups as well as between the inside and outside of Chengdu City groups (H=1.762, P=0.184; H=3.531, P=0.060); In the symptom changes, there was a statistical difference between the inside and outside of Sichuan Province groups (χ2=3.896, P=0.048), which had no statistical difference between the inside and outside of Chengdu City groups (χ2=0.016, P=0.900); In the image changes, the difference was statistically significant between the inside and outside of Chengdu City groups (χ2=7.975, P=0.005), but which had no statistical difference between the inside and outside of Sichuan Province groups (χ2=0.063, P=0.802). ConclusionsThrough data analysis in DACCA in this study, it is found that there are no statistical differences in compliance and carcinoembryonic antigen changes. However, decision-making of NAT for patients of inside and outside of Sichuan Province has different choices on whether to assist targeted therapy and chemotherapy intensity for NAT; Symptom changes of NAT in patients of inside of Sichuan Province has a better effect than in patients of outside of Sichuan Province; Imaging change of NAT in patients of inside of Chengdu City has a better effect than in patients of outside of Chengdu City.
ObjectiveTo systematically review the efficacy of different nucleosides (acids) in preventing hepatitis B virus reactivation after chemotherapy in cancer patients. MethodsThe Cochrane Library, PubMed, EMbase, Web of Science, CNKI, WanFang Data, and VIP databases were electronically searched to collect randomized controlled trials (RCTs) of different nucleosides (acids) to prevent HBV reactivation after chemotherapy in cancer patients from inception to June 7th, 2021. Two reviewers independently screened literature, extracted data, and assessed the risk of bias of included studies. Network meta-analysis was then performed by using Stata 16.0 software. ResultsA total of 43 RCTs involving 3 269 patients were included. There were 7 interventions, namely entecavir (ETV), lamivudine (LAM), adefovir dipivoxil (ADV), telbivudine (LdT), tenofovir dipivoxil (TDF), lamivudine combined with entecavir (LAM+ETV), and lamivudine combined with adefovir dipivoxil (LAM+ADV). The results of network meta-analysis showed that the efficacy of reducing the reactivation rate of ETV, LAM, ADV, LdT, TDF, LAM+ETV, LAM+ADV were superior than the control group. The ETV, LAM and ADV were not as effective as LAM+ETV. The leading drug combinations were LAM+ETV (94.8%), LdT (81.5%) and LA+ADV (58.0%). ConclusionsCurrent evidence shows that LAM+ETV, LdT, and LA+ADV are more effective in preventing hepatitis B virus reactivation after chemotherapy in cancer patients. Due to limited quality and quantity of the included studies, more high-quality studies are required to verify the above conclusions.
Objective To investigate the cause of the positive cancer cell incisal margin in gastrectomy for gastric carcinoma. Methods Thirty-two cases with positive incisal margin in gastrectomy for gastric carcinoma from 1988-1993 in this hospital were retrospectively studied. Results The overall cancer cell positive rate (CCPR) was 7.5%, and that of radical and palliative resection were 5.5% and 12.6%, respectively (Ｐ＜0.05). The CCPR of distal and proximal incisal margin were 5.9% and 13.0% respectively (Ｐ＜0.05), which was related to the gross type, size of cancer, and the degree of differentiation and infiltration. Conclusion The CCPR is high in the infiltrating type, lesions larger than 5 cm in diameter and undifferentiated cancer. To prevent the incisal margin positive for cancer cell in gastrectomy, frozen biopsy should be done if possible.
ObjectiveTo evaluate the degree of psychological pain for cancer patients undergoing surgical treatment and analyze the contributory factors to provide the theoretical basis for psychological intervention for cancer patients with surgical treatment.MethodsThe clinical data of 455 cancer patients who received surgeries in our hospital from November 2020 to January 2021 were retrospectively analyzed, including 225 males and 230 females aged 53.80±13.50 years. By applying the method of convenient sampling, a cross-sectional survey was carried out by gathering the general information of the patients and evaluating their mental condition with the distress thermometer. The contributory factors were discussed by logistic regression analysis.ResultsThe score for the psychological pain of the patients was 4.11±2.49 points. The main factors contributing to the psychological pain were physical problems, emotional problems and family matters. The logistic regression analysis showed that the main factors related to the degree of psychological pain were cancer types (P=0.023), religious belief (P=0.046), number of niduses (P=0.016), respiratory status (P=0.004), medical expense (P=0.007), grief (P=0.001) and anxiety (P=0.040).ConclusionNearly half of the patients have been subjected to apparent psychological pain, and emotion and physical problems are the main factors. It is crucial to pay attention to the patients’ mental problems, seek convenient tools for psychological evaluation, and take actions to deal with the psychological problems and physical symptoms.
Objective o explore the effect and mechanisms of transmembrane 4 super family (TM4SF) in digestive system cancer. Methods Articles were reviewed to discuss the biological characteristics of TM4SF in digestive system cancer. Results TM4SF played an important role in migration and invasion of digestive system cancer, including pancreatic cancer, gastric cancer, colorectal cancer, hepatic cancer, esophageal cancer, and so on. TM4SF modulated the cell biological activities by microdomains which were fixed on cell membrane, such as adhesion, migration, invasion, and proliferation. Conclusion TM4SF may be used to predict the metastasis and prognosis of digestive system cancer and may be the targets of therapy of it in the future.
Carcinoembryonic antigen (CEA)was measured with ABC immunohistochemistry method in fourty-one gastric cancer tissues and sixty-six tissue from normal stomach and gastric benign lesions. The study revealed that the reactive signals in the former were ber than those in the latter. Simultaneously, CEA localized mainly in the cytoplasm or stroma in the cancerous tissue, but in normal gastric tissue or benign gastric lession, CEA distributed mainly in the margin of gland with gastric depression or membranous type. The result also revealed that the distribution patterns of ECA were linked with the cell growth types and infiltrating of gastric cancer. The authors consider that the expression state of CEA in gastric cancer is correlated with its biological behavior, and distribution patterns of CEA are more clinically significant than reactive intensities in the tissue. Patients have different prognosis with different CEA distribution patterns in tissue though their pathological types and TNM stages are the same.
ObjectiveTo investigate the clinical and pathological characteristics of advanced colorectal adenomatous polyps. MethodsPatients with colorectal adenomatous polyps diagnosed after colonoscopy in the Division of Gastroenterology of Zigong First People’s Hospital from January 2013 to March 2019 were selected. The patients were divided into advanced colorectal adenomatous polyps group (advanced group) and non advanced colorectal adenomatous polyps group (non advanced group), to analyze the location distribution, pathological type and the relationship with carcinogenesis of advanced colorectal adenomatous polyps. Results A total of 1 555 patients were included. There were 223 cases (14.34%) in the advanced group and 1 332 cases (85.66%) in the non advanced group. There was no significant difference in the distribution of canceration in postoperative pathological examination (P=1.000), but there was significant difference in other indexes between the two groups (P<0.05). The detection rate of high-grade intraepithelial neoplasia in the advanced group was higher in tubular adenoma than that in villous-tubular adenoma (41.18% vs. 13.74%; χ2=18.959, P<0.001). There was no significant difference in the detection rate of high-grade intraepithelial neoplasia between tubular adenoma and villous adenoma (41.18% vs. 25.00%; χ2=1.992, P=0.220). In the advanced group, 40 cases (17.94%) were at the right colon and 183 cases (82.06%) at the left colon. In the detection rate of high-grade intraepithelial neoplasia in the left colon, there was no significant difference between villous adenoma and villous-tubular adenoma (17.65% vs. 14.41%; χ2=2.801, P=0.094) or tubular adenoma (17.65% vs. 41.82%; χ2=3.289, P=0.088); the rate in tubular adenoma was higher than that in villous-tubular adenoma (41.82% vs. 14.41%; χ2=9.322, P=0.002). There was no significant difference in the detection rate of canceration among tubular adenoma, villous-tubular adenoma and villous adenoma in the advanced group (χ2=3.002, P=0.249). Conclusions At present, colorectal adenomatous polyps should be paid attention to. Endoscopic physicians should master the clinical and pathological characteristics of advanced colorectal adenomatous polyps, in order to raise the detection efficiency of advanced adenoma polyps and cancerous cases.
Increasing evidence suggests that many types of cancers contain a population of cells that display stem cell properties. These cells are called cancer stem cells （CSCs），which are closely related to tumor initiation，growth，metastasis and chemoresistance. CSCs are also found in esophageal squamous cell carcinoma （ESCC）. These cells are characterized by potential of self-renewal and differentiation，tumor formation in nude mice and chemotherapy resistance，and thus may play an important role in targeted cancer therapies. Current methods for culturing and sorting CSCs in ESCC mainly include fluorescence activated cell sorting （FACS），magnetic activated cell sorting （MACS），suspension culture，and side population （SP） cell sorting. In this review，we focus on current research methods for CSCs in ESCC，their biological characteristics and areas for improvement. We believe that a combination of multiple cell-surface makers is needed for research of CSCs in ESCC.
In 2022, the National Cancer Center (NCC) of China reported the nationwide statistics of 2016 using population-based cancer registry data from all available cancer registries in China, which was mainly about the cancer incidence and mortality. Cancer remains a major health problem currently in our country and requires long term cooperation to deal with. This article provided a key point interpretation and analysis of cancer prevalence data in China, and provided an analysis of several main risk factors for cancer, which was conducive to the development of cancer prevention and control programs in different regions.