AIM:To evaluate the covalently closed circle DNA (cccDNA) level of hepatitis B virus (HBV) in patients' liver and sera. METHODS:HBV DNA was isolated from patients' liver biopsies and sera.A sensitive real-time...AIM:To evaluate the covalently closed circle DNA (cccDNA) level of hepatitis B virus (HBV) in patients' liver and sera. METHODS:HBV DNA was isolated from patients' liver biopsies and sera.A sensitive real-time PCR method,which is capable of differentiation of HBV viral genomic DNA and cccDNA,was used to quantify the total HBV cccDNA.The total HBV viral DNA was quantitated by real-time PCR using a HBV diagnostic kit (PG Biotech,LTD,Shenzhen,China) described previously. RESULTS:For the first time,we measured the level of HBV DNA and cccDNA isolated from ten HBV patients' liver biopsies and sera.In the liver biopsies,cccDNA was detected from all the biopsy samples.The copy number of cccDNA ranged from from 0.03 to 173.1 per cell,the copy number of total HBV DNA ranged from 0.08 to 3 717 per cell.The ratio of total HBV DNA to cccDNA ranged from 1 to 3 406.In the sera, cccDNA was only detected from six samples whereas HBV viral DNA was detected from all ten samples.The ratio of cccDNA to total HBV DNA ranged from 0 to 1.77%.To further investigate the reason why cccDNA could only be detected in some patients' sera,we performed longitudinal studies.The cccDNA was detected from the patients' sera with HBV reactivation but not from the patients' sera without HBV reactivation.The level of cccDNA in the sera was correlated with ALT and viral load in the HBV reactivation patients. CONCLUSION:HBV cccDNA is actively transcribed and replicated in some patients' hepatoo/tes,which is reflected by a high ratio of HBV total DNA vs cccDNA.Detection of cccDNA in the liver biopsy will provide an end-point for the anti-HBV therapy.The occurrence of cccDNA in the sera is an early signal of liver damage,which may be another important clinical parameter.展开更多
AIM:To identify the incidence and etiology of anemia after gastrectomy in patients with long-term follow-up after gastrectomy for early gastric cancer.METHODS:The medical records of those patients with early gastric a...AIM:To identify the incidence and etiology of anemia after gastrectomy in patients with long-term follow-up after gastrectomy for early gastric cancer.METHODS:The medical records of those patients with early gastric adenocarcinoma who underwent curative gastrectomy between January 2006 and October 2007 were reviewed.Patients with anemia in the preoperative workup,cancer recurrence,undergoing systemic chemotherapy,with other medical conditions that can cause anemia,or treated during follow up with red cell transfusions or supplements for anemia were excluded.Anemia was defined by World Health Organization criteria(Hb < 12 g/dL in women and < 13 g/dL in men).Iron deficiency was defined as serum ferritin < 20 g/dL.Vitamin B12 deficiency was defined as serum vitamin B 12 < 200 pg/mL.Iron deficiency anemia was defined as anemia with concomitant iron deficiency.Anemia from vitamin B 12 deficiency was defined as megaloblastic anemia(mean cell volume > 100 fL) with vitamin B 12 deficiency.The profile of anemia over 48 mo of follow-up was analyzed.RESULTS:One hundred sixty-one patients with gastrectomy for early gastric cancer were analyzed.The incidence of anemia was 24.5% at 3 mo after surgery and increased up to 37.1% at 48 mo after surgery.The incidence of iron deficiency anemia increased during the follow up and became the major cause of anemia at 48 mo after surgery.Anemia of chronic disease and megaloblastic anemia were uncommon.The incidence of anemia in female patients was significantly higher than in male patients at 12(40.0% vs 22.0%,P = 0.033),24(45.0% vs 25.0%,P = 0.023),36(55.0% vs 28.0%,P = 0.004),and 48 mo(52.0% vs 31.0%,P = 0.022) after surgery.Patients with total gastrectomy showed significantly higher incidence of anemia than patients with subtotal gastrectomy at 48 mo after surgery(60.7% vs 31.3%,P = 0.008).The incidence of iron deficiency was significantly higher in female patients than in male patients at 6(35.4% vs 13.3%,P = 0.002),12(45.8% vs 16.8%,P < 0.001),18(52.1% vs 22.3%,P < 0.001),24(60.4% vs 20.9%,P < 0.001),36(62.5% vs 29.2%,P < 0.001),and 48 mo(66.7% vs 34.7%,P = 0.001) after surgery.CONCLUSION:Anemia was frequent after gastrectomy for early gastric cancer,with iron deficiency being the major cause.Evaluation for anemia including iron status should be performed after gastrectomy and appropriate iron replacement should be considered.展开更多
Objective:Surface-enhanced laser desorption/ionization time-of-flight mass spectrometry(SELDI-TOF-MS) is one of the currently used techniques to identify biomarkers for cancers.This study was planned to make a proteom...Objective:Surface-enhanced laser desorption/ionization time-of-flight mass spectrometry(SELDI-TOF-MS) is one of the currently used techniques to identify biomarkers for cancers.This study was planned to make a proteomic analysis on the serum of stage I gastric cancer patients and establish a early diagnostic model for identifying stage I gastric cancer preliminarily.Methods:A total of 229 serum samples including 169 pathologically confirmed gastric cancer patients(stage I:n = 47;stage II:n = 39;stage III:n = 46;stage IV:n = 37) and 60 gastritis patients were analyzed by SELDI-TOF-MS Protein Chip array technology.The resulting SELDI-TOF-MS spectral data were analyzed using the Biomarker WizardTM and Biomarker Patterns software to find differential proteins and develop a classification tree for early gastric cancer.Results:Twelve proteins were significantly over expressed(P<0.05,Student t-test) in patients with gastric cancer compared to patients with gastritis.Among them,three protein masses with 2873,6121 and 7778 m/z was found to be differentially expressed solely in patients suffering from stage I gastric cancer.The three protein masses construct the decision tree which could effectively distinguish stage I gastric cancer samples from control samples,achieving a sensitivity and specificity of 89.36(42/47) and 97.32%(182/187),respectively.Conclusion:Serum Proteomic Patterns can be used for the quick diagnosis of stage I gastric cancer.SELDI-TOF-MS is a useful tool for the detection and identification of new protein markers in serum.展开更多
AIM:To determine if serum inter-cellular adhesion molecule 1(ICAM-1)is an early marker of the diagnosis and prediction of severe acute pancreatitis(SAP) within 24 h of onset of pain,and to compare the sensitivity,spec...AIM:To determine if serum inter-cellular adhesion molecule 1(ICAM-1)is an early marker of the diagnosis and prediction of severe acute pancreatitis(SAP) within 24 h of onset of pain,and to compare the sensitivity,specificity and prognostic value of this test with those of acute physiology and chronic health evaluation(APACHE)Ⅱscore and interleukin-6(IL-6). METHODS:Patients with acute pancreatitis(AP)were divided into two groups according to the Ranson's criteria:mild acute pancreatitis(MAP)group and SAP group.Serum ICAM-1,APACHEⅡand IL-6 levels were detected in all the patients.The sensitivity,specificity and prognostic value of the ICAM-1,APACHEⅡscore and IL-6 were evaluated. RESULTS:The ICAM-1 level in 36 patients with SAP within 24 h of onset of pain was increased and was significantly higher than that in the 50 patients with MAP and the 15 healthy volunteers(P<0.01).The ICAM-1 level(25 ng/mL)was chosen as the optimum cutoff to distinguish SAP from MAP,and the sensitivity,specificity,positive predictive value,negative predictive value(NPV),positive likelihood ratio and negative likelihood ratio were 61.11%,71.42%,0.6111,0.7142, 2.1382 and 0.5445,respectively.The area under the curve demonstrated that the prognostic accuracy of ICAM-1(0.712)was similar to the APACHE-Ⅱscoring system(0.770)and superior to IL-6(0.508)in distinguishing SAP from MAP. CONCLUSION:ICAM-1 test is a simple,rapid and reliable method in clinical practice.It is an early marker of diagnosis and prediction of SAP within the first 24 h after onset of pain or on admission.As it has a relatively low NPV and does not allow it to be a stand-alone test for the diagnosis of AP,other conventional diagnostic tests are required.展开更多
Inflammatory bowel diseases(IBD),including ulcerative colitis(UC) and Crohn's disease(CD),are chronic,progressive and disabling disorders.Over the last few decades,new therapeutic approaches have been introduced w...Inflammatory bowel diseases(IBD),including ulcerative colitis(UC) and Crohn's disease(CD),are chronic,progressive and disabling disorders.Over the last few decades,new therapeutic approaches have been introduced which have led not only to a reduction in the mortality rate but also offered the possibility of a favorable modification in the natural history of IBD.The identification of clinical,genetic and serological prognostic factors has permitted a better stratification of the disease,thus allowing the opportunity to indicate the most appropriate therapy.Early treatment with immunosuppressive drugs and biologics has offered the opportunity to change,at least in the short term,the course of the disease by reducing,in a subset of patients with IBD,hospitalization and the need for surgery.In this review,the crucial steps in the natural history of both UC and CD will be discussed,as well as the factors that may change their clinical course.The methodological requirements for high quality studies on the course and prognosis of IBD,the true impact of environmental and dietary factors on the clinical course of IBD,the clinical,serological and genetic predictors of the IBD course(in particular,which of these are rel-evant and appropriate for use in clinical practice),the impact of the various forms of medical treatment on the IBD complication rate,the role of surgery for IBD in the biologic era,the true magnitude of risk of colorectal cancer associated with IBD,as well as the mortality rate related to IBD will be stressed;all topics that are extensively discussed in separate reviews included in this issue of World Journal of Gastroenterology.展开更多
Early detection of pregnancy is advantageous to breeders. However, tools that were used in the early pregnancy detection are expensive, laboratory-based and not efficient and applicable enough in the field to farmers....Early detection of pregnancy is advantageous to breeders. However, tools that were used in the early pregnancy detection are expensive, laboratory-based and not efficient and applicable enough in the field to farmers. Thus, there is a need to find a biomarker which not only can detect pregnancy but also could be applied to the livestock on the field. Proteomic approach was used in this study as to search for early pregnancy biomarker. When goat sera at day 14 of gestation were resolved by using two dimensional gel electrophoresis, five differentially expressed proteins were detected. Four of the proteins were identified as albumin precursors, immunoglobulin lambda light chain and zinc-alpha-2-glycoprotein. Pregnancy associated glycoprotein-1 was detected by using liquid chromatography mass spectrometry and the protein was validated by immunoblotting. These proteins have potential to be used as a biomarker for early pregnancy detection, however, more extensive analysis are needed to validate its possibility.展开更多
基金SuppoSed by CRCG grant from the University of Hong KongCERG grant from University Grant Council of Hong Kong Research Fund from Science and Technology Commission of Shanghai,China
文摘AIM:To evaluate the covalently closed circle DNA (cccDNA) level of hepatitis B virus (HBV) in patients' liver and sera. METHODS:HBV DNA was isolated from patients' liver biopsies and sera.A sensitive real-time PCR method,which is capable of differentiation of HBV viral genomic DNA and cccDNA,was used to quantify the total HBV cccDNA.The total HBV viral DNA was quantitated by real-time PCR using a HBV diagnostic kit (PG Biotech,LTD,Shenzhen,China) described previously. RESULTS:For the first time,we measured the level of HBV DNA and cccDNA isolated from ten HBV patients' liver biopsies and sera.In the liver biopsies,cccDNA was detected from all the biopsy samples.The copy number of cccDNA ranged from from 0.03 to 173.1 per cell,the copy number of total HBV DNA ranged from 0.08 to 3 717 per cell.The ratio of total HBV DNA to cccDNA ranged from 1 to 3 406.In the sera, cccDNA was only detected from six samples whereas HBV viral DNA was detected from all ten samples.The ratio of cccDNA to total HBV DNA ranged from 0 to 1.77%.To further investigate the reason why cccDNA could only be detected in some patients' sera,we performed longitudinal studies.The cccDNA was detected from the patients' sera with HBV reactivation but not from the patients' sera without HBV reactivation.The level of cccDNA in the sera was correlated with ALT and viral load in the HBV reactivation patients. CONCLUSION:HBV cccDNA is actively transcribed and replicated in some patients' hepatoo/tes,which is reflected by a high ratio of HBV total DNA vs cccDNA.Detection of cccDNA in the liver biopsy will provide an end-point for the anti-HBV therapy.The occurrence of cccDNA in the sera is an early signal of liver damage,which may be another important clinical parameter.
文摘AIM:To identify the incidence and etiology of anemia after gastrectomy in patients with long-term follow-up after gastrectomy for early gastric cancer.METHODS:The medical records of those patients with early gastric adenocarcinoma who underwent curative gastrectomy between January 2006 and October 2007 were reviewed.Patients with anemia in the preoperative workup,cancer recurrence,undergoing systemic chemotherapy,with other medical conditions that can cause anemia,or treated during follow up with red cell transfusions or supplements for anemia were excluded.Anemia was defined by World Health Organization criteria(Hb < 12 g/dL in women and < 13 g/dL in men).Iron deficiency was defined as serum ferritin < 20 g/dL.Vitamin B12 deficiency was defined as serum vitamin B 12 < 200 pg/mL.Iron deficiency anemia was defined as anemia with concomitant iron deficiency.Anemia from vitamin B 12 deficiency was defined as megaloblastic anemia(mean cell volume > 100 fL) with vitamin B 12 deficiency.The profile of anemia over 48 mo of follow-up was analyzed.RESULTS:One hundred sixty-one patients with gastrectomy for early gastric cancer were analyzed.The incidence of anemia was 24.5% at 3 mo after surgery and increased up to 37.1% at 48 mo after surgery.The incidence of iron deficiency anemia increased during the follow up and became the major cause of anemia at 48 mo after surgery.Anemia of chronic disease and megaloblastic anemia were uncommon.The incidence of anemia in female patients was significantly higher than in male patients at 12(40.0% vs 22.0%,P = 0.033),24(45.0% vs 25.0%,P = 0.023),36(55.0% vs 28.0%,P = 0.004),and 48 mo(52.0% vs 31.0%,P = 0.022) after surgery.Patients with total gastrectomy showed significantly higher incidence of anemia than patients with subtotal gastrectomy at 48 mo after surgery(60.7% vs 31.3%,P = 0.008).The incidence of iron deficiency was significantly higher in female patients than in male patients at 6(35.4% vs 13.3%,P = 0.002),12(45.8% vs 16.8%,P < 0.001),18(52.1% vs 22.3%,P < 0.001),24(60.4% vs 20.9%,P < 0.001),36(62.5% vs 29.2%,P < 0.001),and 48 mo(66.7% vs 34.7%,P = 0.001) after surgery.CONCLUSION:Anemia was frequent after gastrectomy for early gastric cancer,with iron deficiency being the major cause.Evaluation for anemia including iron status should be performed after gastrectomy and appropriate iron replacement should be considered.
基金Supported by a grant from the Key Project of Shandong Scientific andTechnology (No. 2008GG30002034)
文摘Objective:Surface-enhanced laser desorption/ionization time-of-flight mass spectrometry(SELDI-TOF-MS) is one of the currently used techniques to identify biomarkers for cancers.This study was planned to make a proteomic analysis on the serum of stage I gastric cancer patients and establish a early diagnostic model for identifying stage I gastric cancer preliminarily.Methods:A total of 229 serum samples including 169 pathologically confirmed gastric cancer patients(stage I:n = 47;stage II:n = 39;stage III:n = 46;stage IV:n = 37) and 60 gastritis patients were analyzed by SELDI-TOF-MS Protein Chip array technology.The resulting SELDI-TOF-MS spectral data were analyzed using the Biomarker WizardTM and Biomarker Patterns software to find differential proteins and develop a classification tree for early gastric cancer.Results:Twelve proteins were significantly over expressed(P<0.05,Student t-test) in patients with gastric cancer compared to patients with gastritis.Among them,three protein masses with 2873,6121 and 7778 m/z was found to be differentially expressed solely in patients suffering from stage I gastric cancer.The three protein masses construct the decision tree which could effectively distinguish stage I gastric cancer samples from control samples,achieving a sensitivity and specificity of 89.36(42/47) and 97.32%(182/187),respectively.Conclusion:Serum Proteomic Patterns can be used for the quick diagnosis of stage I gastric cancer.SELDI-TOF-MS is a useful tool for the detection and identification of new protein markers in serum.
文摘AIM:To determine if serum inter-cellular adhesion molecule 1(ICAM-1)is an early marker of the diagnosis and prediction of severe acute pancreatitis(SAP) within 24 h of onset of pain,and to compare the sensitivity,specificity and prognostic value of this test with those of acute physiology and chronic health evaluation(APACHE)Ⅱscore and interleukin-6(IL-6). METHODS:Patients with acute pancreatitis(AP)were divided into two groups according to the Ranson's criteria:mild acute pancreatitis(MAP)group and SAP group.Serum ICAM-1,APACHEⅡand IL-6 levels were detected in all the patients.The sensitivity,specificity and prognostic value of the ICAM-1,APACHEⅡscore and IL-6 were evaluated. RESULTS:The ICAM-1 level in 36 patients with SAP within 24 h of onset of pain was increased and was significantly higher than that in the 50 patients with MAP and the 15 healthy volunteers(P<0.01).The ICAM-1 level(25 ng/mL)was chosen as the optimum cutoff to distinguish SAP from MAP,and the sensitivity,specificity,positive predictive value,negative predictive value(NPV),positive likelihood ratio and negative likelihood ratio were 61.11%,71.42%,0.6111,0.7142, 2.1382 and 0.5445,respectively.The area under the curve demonstrated that the prognostic accuracy of ICAM-1(0.712)was similar to the APACHE-Ⅱscoring system(0.770)and superior to IL-6(0.508)in distinguishing SAP from MAP. CONCLUSION:ICAM-1 test is a simple,rapid and reliable method in clinical practice.It is an early marker of diagnosis and prediction of SAP within the first 24 h after onset of pain or on admission.As it has a relatively low NPV and does not allow it to be a stand-alone test for the diagnosis of AP,other conventional diagnostic tests are required.
文摘Inflammatory bowel diseases(IBD),including ulcerative colitis(UC) and Crohn's disease(CD),are chronic,progressive and disabling disorders.Over the last few decades,new therapeutic approaches have been introduced which have led not only to a reduction in the mortality rate but also offered the possibility of a favorable modification in the natural history of IBD.The identification of clinical,genetic and serological prognostic factors has permitted a better stratification of the disease,thus allowing the opportunity to indicate the most appropriate therapy.Early treatment with immunosuppressive drugs and biologics has offered the opportunity to change,at least in the short term,the course of the disease by reducing,in a subset of patients with IBD,hospitalization and the need for surgery.In this review,the crucial steps in the natural history of both UC and CD will be discussed,as well as the factors that may change their clinical course.The methodological requirements for high quality studies on the course and prognosis of IBD,the true impact of environmental and dietary factors on the clinical course of IBD,the clinical,serological and genetic predictors of the IBD course(in particular,which of these are rel-evant and appropriate for use in clinical practice),the impact of the various forms of medical treatment on the IBD complication rate,the role of surgery for IBD in the biologic era,the true magnitude of risk of colorectal cancer associated with IBD,as well as the mortality rate related to IBD will be stressed;all topics that are extensively discussed in separate reviews included in this issue of World Journal of Gastroenterology.
文摘Early detection of pregnancy is advantageous to breeders. However, tools that were used in the early pregnancy detection are expensive, laboratory-based and not efficient and applicable enough in the field to farmers. Thus, there is a need to find a biomarker which not only can detect pregnancy but also could be applied to the livestock on the field. Proteomic approach was used in this study as to search for early pregnancy biomarker. When goat sera at day 14 of gestation were resolved by using two dimensional gel electrophoresis, five differentially expressed proteins were detected. Four of the proteins were identified as albumin precursors, immunoglobulin lambda light chain and zinc-alpha-2-glycoprotein. Pregnancy associated glycoprotein-1 was detected by using liquid chromatography mass spectrometry and the protein was validated by immunoblotting. These proteins have potential to be used as a biomarker for early pregnancy detection, however, more extensive analysis are needed to validate its possibility.