Comparative proteomic approach in differentiating multicentric occurrence and intrahepatic metastasis in multinodular hepatocellular carcinomas / 癌症

<p><b>BACKGROUND AND OBJECTIVE</b>Multinodular hepatocellular carcinoma(HCC) might originate from multicentric occurrence (MO) or intrahepatic metastasis(IM). This study was to find out proteins which play important roles in clonal origin of multinodular hepatocellular carcinoma bt screening the differentially expressed proteins between the MO and IM tissues using comparative proteomic analysis.</p><p><b>METHODS</b>Total protein extracted was separated by two-dimensional gel electrophoresis. Comparative analyses of the 2-DE protein patterns between the two groups were carried out using computerized imaging techniques. Proteins exhibiting significant alternations were subsequently isolated and identified by mass spectrometry.</p><p><b>RESULTS</b>A total 1025+/-52 and 900+/-98 spots were detected in the protein profile in IM and MO, respectively. Twenty-five protein spots were statistically different at expression levels between the two groups. Twenty of them were identified by MALDI-TOF-MS and bioinformatics.</p><p><b>CONCLUSIONS</b>The protein profile of MO HCC tissues is different from that in IM HCC tissues. The twenty differentially expressed proteins might play a key role in the carcinogenesis and progression of multinodular HCC. These newly identified proteins might be potential and valuable biomarkers for identifying the multinodular HCC of clonal origin.</p>

Diagnosis and treatment of primary clear cell carcinoma of the liver / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To investigate the clinicopathological features, diagnosis, treatment and prognosis of primary clear cell carcinoma of the liver (PCCCL).</p><p><b>METHODS</b>The clinicopathological data of 24 cases with pathologically proven PCCCL in the First Affiliated Hospital of Guangxi Medical University from May 1996 to December 2003 were collected and analyzed.</p><p><b>RESULTS</b>There were 21 males and 3 females in this group, with an average age of 46 years (range: 30 approximately 78 years). HBV infection was detected in 83.3%, and AFP expression was found in 75.0% of them. Of the 24 cases, 28 tumors were found with an average size of (6.64 +/- 5.54) cm. Liver cirrhosis was found in 75.0% of the patients. Macroscopic and microscopic tumor thrombi were found in 20.8% and 29.2%, respectively. Lymph node metastasis was found in 4.2% of the patents. The 1-, 3-, and 5-year overall survival rates of the 24 cases were 75.0%, 41.7% and 27.8%, respectively, with a median survival time of 29 months.</p><p><b>CONCLUSION</b>The clinical characteristics of primary clear cell carcinoma of the liver are similar to that of common hepatocellular carcinoma. It is difficult to be diagnosed preoperatively and final diagnosis depends on pathological examination. Surgical resection is an effective way to achieve favorable treatment outcome and even long-term survival.</p>

Application of polymerase chain reaction with confronting two-pair primers in aldehyde dehydrogenase-2 typing / 中华预防医学杂志

<p><b>OBJECTIVE</b>To study the distribution of aldehyde dehydrogenase-2 (ALDH2) polymorphisms between healthy Zhuang and Han ethnic individuals in Guangxi Autonomous Region and its influence to the behaviors of alcohol consumption.</p><p><b>METHODS</b>Polymerase chain reaction with confronting two-pair primers (PCR-CTPP) and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) techniques were used to genotype ALDH2, respectively, and alcohol consumption was recorded in a constructed questionnaire.</p><p><b>RESULTS</b>The frequencies of ALDH2 alleles (ALDH2(1)/ALDH2(2)) among Zhuang and Han ethnics were 0.511, 0.489 and 0.508, 0.492 respectively (chi2 = 0.001, P > 0.05). The ALDH2 genotypes were verified with PCR-RFLP method. The frequencies of ALDH2(1) genotype in alcoholics (> or = 3 times drinking per week) were 35.59% and 15.67% in Zhuang and Han groups respectively (chi2 = 5.800, P = 0.016).</p><p><b>CONCLUSION</b>There was no significant different distribution of ALDH2 genotype among healthy Zhuang and Han ethnic people. The genotype of ALDH2 in different ethnicity might influence individual behavior of alcohol consumption.</p>