Objective To investigate the clinical outlook of hepatic stem cells and its relations with liver cancer. Methods The literatures of recent years on the studies of hepatic stem cells were reviewed. Results Liver cancer may consist of cells of various differentiation grades and it may result from the perodifferentiated hepatic stem cells or abnormal differentiated cells. Conclusion The hypothesis of hepatic stem cells has been identified extensively. Further study maybe helpful for revealing the origin, carcinogenesis of hepatic cancer, and may also be useful for the understanding of the mechanism of metastasis.
ObjectiveTo summarize the current comparison of the efficacy of different treatments for recurrent hepatocellular carcinoma.MethodTo search the literatures about the comparative studies on the efficacy of different treatments for recurrent hepatocellular carcinoma in recent years and analyze them.ResultsIn the treatment of recurrent hepatocellular carcinoma, percutaneous arterial chemoembolization combined with radiofrequency ablation could improve the survival rate and tumor-free survival rate to some extent, compared with the single use of percutaneous arterial chemoembolization. In the short term, there was no difference in efficacy between radiofrequency ablation and surgical resection, but the local recurrence rate of radiofrequency ablation was higher than that of surgical resection group. Salvage liver transplantation offered potential opportunity to reduce the risk of recurrence and tended to improve long-term survival outcomes, but liver sources were scarce and costly. ConclusionsAt present, there is no systematic staging scheme and treatment system for recurrent hepatocellular carcinoma. At the same time, most studies are retrospective, and more prospective studies are needed to further explore the treatment of recurrent hepatocellular carcinoma.
【Abstract】Objective To review the recent advances in the use of marginal liver in liver transplantation. Methods The literatures of recent years on the use of marginal liver for liver transplantation were reviewed and summarized.Results The donors with older age, hemodynamic instability, long stay in the intensive care unit and fatty liver are significantly clinical marginal liver donors.Conclusion Though the use of marginal liver donors negatively influences the results of liver transplantation, marginal liver expands the liver source for liver transplantation with a good result.
Objective To investigate the immunoregulatory effects of immunonutrient ω-3 polyunsaturated fatty acid (PUFA) and its applications in organ transplantation. Methods Relevant literatures of recent years were reviewed. Results The immunoregulatory effects of ω-3 PUFA can inhibit proliferation and activation of the immunocompetent cells including T cell and B cell, reduce cytokine production, modulate immunologic response, improve graft function, pro-long survival, reduce episodes of rejection, and lessen adverse reactions of immunosuppressor.Conclusion ω-3 PUFA should have wide applications in organ transplantation due to its immunoregulatory effects. However, this research should be further studied.
【Abstract】ObjectiveTo report the diagnosis and treatment of hilar cholangiocarcinoma.MethodsThe relevant information about the hispathological feature, transfer ways, clinical manifestation, laboratory examination, imaging feature, immunohistochemical examination and treatment ways were gathered from previous original articles, and checking the latest issues of appropriate journals.ResultsThe clinical manifestation, laboratory examination, and imaging feature of hilar cholangiocarcinoma were due to the neoplasm obstructing bile duct and sequent infection of bile duct. The diagnosis was depanded on the combining clinical manifestation, laboratory examination and imaging feature. The value of immunohistochemical examination was not clear. Radical surgery was the best treatment of unique curing the neoplasm. By-pass surgery was used in the late phase patients to solve the obstruction of bile and digest duct. The effect of unique chemical treatment was not perfect. It did’t generally propose the treatment of orthotopic liver transplantation.ConclusionThe perfect prognosis of hilar cholangiocarcinoma is depended on early diagnosis and redical surgery.
【Abstract】Objective To review the advances in overcoming multidrug resistance of tumors caused by mdr1 gene.Methods Different ways of overcoming multidrug resistance of tumors caused by mdr1 gene in the literatures were reviewed. Results One of the important reasons causing multidrug resistance was due to the overexpression of mdr1 gene and its product Pglycoprotein. There were two ways to overcome multidrug resistance of tumors through mdr1 genes mRNA and its product Pglycoprotein effectively.Conclusion The clinical test of the unitary way to overcome multidrug resistance of tumors is unsatisfactory, combining different ways to overcome multidrug resistance of tumors will be the hot spot of tumors research in the future.
ObjectiveTo study the clinical manifestations, pathologic characteristics, imaging features, diagnosis and treatment of adenomas of extrahepatic bile duct.MethodsTwo cases of adenomas of extrahepatic bile duct in our hospital and 14 cases reported in the literatures were analyzed retrospectively.ResultsThe patients’(male 5, female 11) mean age was 58.4 years (range 21-85). The main manifestations included jaundice (n=11), abdominal pain (n=8),fever (n=6),dyspepsia (n=4),body weight loss (n=3) and claycolored stool (n=1). The locations of tumors were in the left hepatic duct (n=1), right hepatic duct (n=3), hepatic common bile duct(n=3）,the junction of cystic duct and common bile duct (n=1），distal common bile duct (n=8). The pathologic types were tubular adenomas (n=5), papillary (villous) adenomas (n=10),and mucous adenoma (n=1). All the patients underwent surgical therapy. The tumors were identified by postoperative histopathologic examination.ConclusionIt is difficult to correctly diagnose adenomas of extrahepatic bile duct before operation, because the clinical manifestations are usually atypical. The definite diagnosis should depend on histopathologic examination. It is the key to completely resect the tumors. Postoperative followup should be done on regular basis.
Objective To investigate the feasibility of differentiating human umbilical cord blood stem cells into hepatocytes. Methods Thirty-six BALB/c nude mice were randomly divided into experimental group and control group(18 in each of the group), and experimental group was again randomly divided into group A， B and C (six in each of the group). The mice in experimental group and control group were exposed to 350 cGy radiation produced by 60Ｃｏ. After 3 h, karyocytes at different concentrations in the fresh human umbilical cord blood were injected into the mice in experimental group A, B, C via their tail veins, and the equal volume of normal sodium (NS) was also injected into control group via tail veins. After one month, carbon tetrachloride (CCl4) was injected into experimental group A, B and control group via abdominal cavity, and the equal volume of normal sodium was injected into experimental group C. After two months, immunohistochemistry and reverse transcriptase polymerase chain reaction (RT-PCR) were used to detect the expressions of human cytokeratin-18 (CK18), cytokeratin-19 (CK19) and albumin (ALB) in liver tissues of all mice. Results The expressions of CK18, CK19 and ALB in injured liver tissues were all positive, and the expressions of experimental group B were higher than those of experimental group A （P＜0.05）, but the expressions of CK18, CK19 and ALB in the liver tissues of control group and experimental group C, whose were not injured with CCl4, were all negative. Conclusion Human umbilical cord blood-derived stem cells can differentiate into hepatocytes and express ALB under special microenvironment after liver injured by CCl4 , and the expression level of ALB maybe directly related to the number of human umbilical cord blood stem cells.
As a worldwide challenge in the field of neurosurgery, there is no effective treatment method for pediatric skull defects repair in clinic. Currently clinical used cranioplasty materials couldn’t undergo adjustment in response to skull growth and deformation. An ideal material for pediatric cranioplasty should fulfill the requirements of achieving complete closure, good osseointegration, biodegradability and conformability, sufficient cerebral protection and optimal aesthetic, and functional restoration of calvaria. Biomimetic mineralized collagen-based bone material is a kind of material that simulates the microstructural unit of natural bone on the nanometer scale. Because of its high osteogenic activity, it is widely used in repair of all kinds of bone defects. Recently, the biomimetic mineralized collagen-based bone materials have successfully been applied for cranial regeneration and repair with satisfactory results. This review mainly introduces the characteristics of the biomimetic mineralized collagen-based bone materials, the advantages for the repair of pediatric skull defects, and the related progresses.
【Abstract】ObjectiveTo summarize the experience in diagnosis and treatment for chronic lymphocytic thyroiditis or complicated with other thyroid diseases． MethodsSeventyseven patients were diagnosed as chronic lymphocytic thyroiditis or complicated with other thyroid diseases by operation and histological examination at this department from November 2002 to March 2005. All their clinical records including general information, the results of careful physical examination， thyroid correlated hormone tests， color Doppler, fine needle aspiration cytological examination and some intraoperative examinations have been retrospectively analyzed in this report. ResultsThere were 53 cases of simple chronic lymphocytic thyroiditis, 10 cases complicated by papillary carcinoma， 1 case complicated by follicular carcinoma， 2 cases complicated by nonHodgkin’s lymphoma, 6 cases complicated by nodular goiter, 4 cases complicated by follicular adenoma, and 1 complicated by parathyroid adenoma. Almost all the operations were successfull and the symptoms of the diseases were alleviated. Seventytwo patients had been followed up ranging from two months to two years differently and none of them relapsed. Sixtythree of these patients have received thyrine inhibition and vicariousness treatment, 2 patients who complicated by nonHodgkin’s lymphoma had been hospitalized and 7 patients complicated by carcinoma were treated with iodine131. ConclusionThe clinical manifestations of chronic lymphocytic thyroiditis are complex, and it often complicated with other thyroid disease, which make it difficult to diagnose the diseases before operation. However, some ancillary methods such as careful physical examination， thyroid correlated hormone tests， color Doppler and fine needle aspiration cytological examination may improve the accuracy of preoperative diagnosis. Intraoperative thyroid lamellar section and frozen histological examination are also very important for intraoperative diagnosis and operative modality selection．