Diagnostic and therapeutic progress of multi-drug resistance with anti-HBV nucleos(t)ide analogues

Nucleos(t)ide analogues(NA) are a breakthrough in the treatment and management of chronic hepatitis B.NA could suppress the replication of hepatitis B virus(HBV) and control the progression of the disease.However,drug resistance caused by their long-term use becomes a practical problem,which influences the long-term outcomes in patients.Liver transplantation is the only choice for patients with HBV-related end-stage liver disease.But,the recurrence of HBV after transplantation often caused by the development of drug resistance leads to unfavorable outcomes for the recipients.Recently,the multi-drug resistance(MDR) has become a common issue raised due to the development and clinical application of a variety of NA.This may complicate the antiviral therapy and bring poorly prognostic outcomes.Although clinical evidence has suggested that combination therapy with different NA could effectively reduce the viral load in patients with MDR,the advent of new antiviral agents with high potency and high genetic barrier to resistance brings hope to antiviral therapy.The future of HBV researches relies on how toprevent the MDR occurrence and develop reasonable and effective treatment strategies.This review focuses on the diagnostic and therapeutic progress in MDR caused by the anti-HBV NA and describes some new research progress in this field.

Add-on pegylated interferon augments hepatitis B surface antigen clearance vs continuous nucleos(t)ide analog monotherapy in Chinese patients with chronic hepatitis B and hepatitis B surface antigen≤1500 IU/mL:An observational study

BACKGROUND Nucleos(t)ide analog(NA)has shown limited effectiveness against hepatitis B surface antigen(HBsAg)clearance in chronic hepatitis B(CHB)patients.AIM To evaluate the efficacy and safety of add-on peginterferonα-2a(peg-IFNα-2a)to an ongoing NA regimen in CHB patients.METHODS In this observational study,195 CHB patients with HBsAg≤1500 IU/m L,hepatitis B e antigen(HBeAg)-negative(including HBeAg-negative patients or HBeAg-positive patients who achieved HBeAg-negative after antiviral treatment with NA)and hepatitis B virus-deoxyribonucleic acid<1.0×10^2 IU/mL after over 1 year of NA therapy were enrolled between November 2015 and December2018 at the Second Affiliated Hospital of Xi'an Jiaotong University,China.Patients were given the choice between receiving either peg-IFNα-2a add-on therapy to an ongoing NA regimen(add-on group,n=91)or continuous NA monotherapy(monotherapy group,n=104)after being informed of the benefits and risks of the peg-IFNα-2a therapy.Total therapy duration of peg-IFNα-2a was 48 wk.All patients were followed-up to week 72(24 wk after discontinuation of peg-IFNα-2a).The primary endpoint was the proportion of patients with HBsAg clearance at week 72.RESULTS Demographic and baseline characteristics were comparable between the two groups.Intention-to-treatment analysis showed that the HBsAg clearance rate in the add-on group and monotherapy group was 37.4%(34/91)and 1.9%(2/104)at week 72,respectively.The HBsAg seroconversion rate in the add-on group was 29.7%(27/91)at week 72,and no patient in the monotherapy group achieved HBsAg seroconversion at week 72.The HBsAg clearance and seroconversion rates in the add-on group were significantly higher than in the monotherapy group at week 72(P<0.001).Younger patients,lower baseline HBsAg concentration,lower HBsAg concentrations at weeks 12 and 24,greater HBsAg decline from baseline to weeks 12 and 24 and the alanine aminotransferase≥2×upper limit of normal during the first 12 wk of therapy were strong predictors of HBsAg clearance in patients with peg-IFNα-2a add-on treatment.Regarding the safety of the treatment,4.4%(4/91)of patients in the add-on group discontinued peg-IFNα-2a due to adverse events.No severe adverse events were noted.CONCLUSION Peg-IFNα-2a as an add-on therapy augments HBsAg clearance in HBeAg-negative CHB patients with HBsAg≤1500 IU/m L after over 1 year of NA therapy.

Benefits of nucleos(t)ide analog treatments for hepatitis B virus-related cirrhosis

Chronic hepatitis B infection induces progressive liver disease. Before nucleos(t)ide analogs(NUCs) became established as a safe and effective treatment for hepatitis B,it was difficult to suppress the activity of the hepatitis B virus(HBV). Currently,many patients withhepatitis or cirrhosis associated with HBV are treated with NUCs for an extended period of time,and the effects,benefits,and limitations of these treatments have been apparent. This article reviews HBV-related cirrhosis,its natural course and survival,histological improvement after NUC treatments,treatment effects for decompensated cirrhosis,the incidence of hepatocellular carcinoma(HCC) after NUC treatments,and the efficacy of NUC treatments before and after the treatment of patients for HBV-related HCC. Of particular interest are the histological improvements,including regression of fibrosis,that have been achieved with NUC treatments. Liver function of patients with decompensated cirrhosis has significantly improved regardless of the type of NUC applied,and treatment with NUCs has reduced the incidence of HCC in cirrhotic patients. However,cirrhosis remains the strongest risk factor for HCC occurrence following NUC treatments,and the long-term cumulative incidence of HCC after NUC treatments remains high. When recurrence does occur,it is important to reconsider the treatment modality according to the degree of improved liver function that was achieved.

Risk for hepatocellular carcinoma in the course of chronic hepatitis B virus infection and the protective effect of therapy with nucleos(t)ide analogues

Hepatocellular carcinoma(HCC) is a major health problem worldwide, representing one of the leading causes of death. Chronic hepatitis B virus(HBV) infection(CHB) is the most important etiologic factor of this tumor, accounting for the development of more than50% of the cases in the world. Primary prevention ofHCC is possible by hepatitis B vaccination conferring protection from HBV infection. However, according to the World Health Organization Hepatitis B Fact sheet N° 204(update of July 2014) globally there exists a large pool of > 240 million people chronically infected with HBV who are at risk for development of HCC. These individuals represent a target population for secondary prevention both of cirrhosis and of HCC. Since ongoing HBV replication in CHB is linked with the progression of the underlying liver disease to cirrhosis as well as with the development of HCC, effective antiviral treatment in CHB has also been evaluated in terms of secondary prevention of HCC. Currently, most patients with active CHB are subjected to long term treatment with the first line nucleos(t)ide analogues entecavir and tenofovir. These compounds are of high antiviral potency and have a high barrier to HBV resistance compared to lamivudine, adefovir dipivoxil and even telbivudine. Many studies have shown that patients under antiviral treatment, especially those in virological remission, develop less frequently HCC compared to the untreated ones. However, the risk for development of HCC cannot be eliminated. Therefore, surveillance for the development of HCC of patients with chronic hepatitis B must be lifelong or until a time in the future when new treatments will be able to completely eradicate HBV from the liver particularly in the early stages of CHB infection. In this context, the aim of this review is to outline the magnitude of the risk for development of HCC among patients with CHB, in the various phases of the infection and in relation to virus, host and environmental factors as evaluated in the world literature. Moreover, the benefits of antiviral treatment of CHB with nucleos/tide analogs, which have changed the natural history of the disease and have reduced but not eliminated the risk of HCC are also reviewed.

HBsAg clearance by Peg-interferon addition to a long-term nucleos(t)ide analogues therapy

The ideal endpoint of hepatitis B virus(HBV)antiviral therapy is HBsAg loss,a difficult goal to obtain,especially in HBeAg negative patients.Herein,we report the results obtained by the addition of peg-interferonα-2a to a long-lasting nucleos(t)ide analogues therapy in a HBeAg negative,genotype D patient with steadily HBV-DNA negative/HBsAg positive values.In 2002,our Caucasian 44-year-old male patient received lamivudine and,4 years later,added adefovir because of a virological breakthrough.In 2011,considering his young age,liver stiffness(4.3 kPa)and HBsAg levels(3533IU/mL),we added Peg-interferonα-2a for six months(3in combination with nucleos(t)ide analogues followed by 3 mo of Peg-interferonα-2a monotherapy).A decrease of HBsAg levels was observed after 1 mo(1.21log)of Peg-interferon and 3 mo(1.88 log)after the discontinuation of all drugs.Later,a complete clearance of HBsAg was obtained with steadily undetectable HBVDNA serum levels(<9 IU/mL).HBsAg clearance by the addition of a short course of Peg-interferonα-2a represents an important result with clinical and pharmacoeconomic implications,considering that nucleos(t)ide analogues therapy in HBeAg negative chronic hepatitis B patients is considered a long-lasting/life-long treatment.

Is it possible to stop nucleos(t)ide analogue treatment in chronic hepatitis B patients?

Chronic hepatitis B(CHB) remains a challenging global health problem, with nearly one million related deaths per year. Nucleos(t)ide analogue(NA) treatment suppresses viral replication but does not provide complete cure of the hepatitis B virus(HBV) infection. The accepted endpoint for therapy is the loss of hepatitis B surface antigen(HBs Ag), but this is hardly ever achieved. Therefore, indefinite treatment is usually required. Many different studies have evaluated NA therapy discontinuation after several years of NA treatment and before HBs Ag loss. The results have indicated that the majority of patients can remain off therapy, with some even reaching HBs Ag seroconversion. Fortunately, this strategy has proved to be safe, but it is essential to consider the risk of liver damage and other comorbidities and to ensure aclose follow-up of the candidates before considering this strategy. Unanswered questions remain, namely in which patients could this strategy be effective and what is the optimal time point at which to perform it. To solve this enigma, we should keep in mind that the outcome will ultimately depend on the equilibrium between HBV and the host's immune system. Viral parameters that have been described as good predictors of response in HBe Ag(+) cases, have proven useless in HBe Ag(-) ones. Since antiviral immunity plays an essential role in the control of HBV infection, we sought to review and explain potential immunological biomarkers to predict safe NA discontinuation in both groups.

Serum hepatitis B surface antigen levels predict treatment response to nucleos(t)ide analogues

Quantification of hepatitis B surface antigen(HBsAg)has been suggested to be helpful in the management of chronic hepatitis B(CHB)patients.Nucleos(t)ide analogs(NAs)are the therapy of choice for CHB and are used in the majority of CHB patients.NAs are able to induce hepatitis B virus(HBV)viral suppression,normalization of alanine aminotransferase(ALT)levels,and improvement in liver histology.Automated quantitative assays for serum HBsAg have recently become available,facilitating standardized quantification of serum HBsAg.This has led to increased interest in the clinical application of quantitative serum HBsAg for predicting therapeutic response to NAs.Recent studies have shown that a decline in serum HBsAg levels in patients receiving peginterferon may signal successful induction of immune control over HBV,and can therefore be used to predict therapeutic response.NA treatment typically induces a less rapid decline in HBsAg than interferon treatment;it has been estimated that full HBsAg clearance can require decades of NA treatment.However,a rapid HBsAg decline during NA therapy may identify patients who will show clearance of HBsAg.Currently,there is no consensus on the clinical utility of serum HBsAg monitoring for evaluating patient responses to NA therapy.This review focuses on recent findings regarding the potential application of HBsAg quantification in the management of CHB patients receiving NA therapy.

When to stop nucleos(t)ide analogues treatment for chronic hepatitis B? Durability of antiviral response

Introduction of nucleos(t)ide analogues(NAs)for oral antiviral therapy has dramatically improved the clinical outcome in patients with chronic hepatitis B(CHB).Although current international guidelines for the management of CHB provide information regarding when to begin the antiviral therapy with NAs,there is no clear consensus on when to stop the treatment,especially for those who respond to the therapy.Hepatitis B surface antigen loss has been regarded as an ideal endpoint of oral antiviral therapy with NAs,however since this is rarely achieved,practical endpoints have been suggested by the international guidelines.Despite the stopping rules recommended by the international guidelines,whether oral antiviral therapy with NAs can be safely discontinued is of major concern.While attention has been drawn to whether antiviral treatment with NAs can be a finite therapy,there is lack of sufficient data on off-treatment durability of highly potent NAs.Based on the available evidences,current guidelines for stopping NA therapy seems to be inadequate in terms of off-treatment durability,with relapse rates of more than 40%for both hepatitis Be antigen(HBeAg)-positive and HBeAg-negative patients.Therefore,further studies are required to accumulate data on off-treatment durability of highly potent NAs,and future studies are warranted to identify adequate predictive markers that could provide supplementary information to guide the timing of stopping NA therapy.

Hepatocellular carcinoma progression in hepatitis B virus-related cirrhosis patients receiving nucleoside(acid)analogs therapy:A retrospective cross-sectional study

BACKGROUND Antiviral therapy cannot completely block the progression of hepatitis B to hepatocellular carcinoma(HCC).Furthermore,there are few predictors of early HCC progression and limited strategies to prevent progression in patients with HBV-related cirrhosis who receive nucleos(t)ide analog(NA)therapy.AIM The study aim was to clarify risk factors and the diagnostic value of alphafetoprotein(AFP)for HCC progression in NA-treated hepatitis B virus(HBV)-related cirrhosis patients.METHODS In this retrospective cross-sectional study,we analyzed the clinical data of 266 patients with HBV-related cirrhosis who received NA treatment between February 2014 and April 2020 at Zhejiang Provincial People’s Hospital.The patients were divided into two groups,145 who did not progress to HCC(No-HCC group),and 121 who progressed to HCC during NA treatment(HCC group).The logistic regression analysis was used to analyze the risk factors of HCC progression.The diagnostic value of AFP for HCC was evaluated by receiver operating characteristic(ROC)curve analysis.RESULTS Univariate analysis showed that age≥60 years(P=0.001),hepatitis B and alcoholic etiology(P=0.007),smoking history(P<0.001),family history of HBV-related HCC(P=0.002),lamivudine resistance(P=0.011),HBV DNA negative(P=0.023),aspartate aminotransferase>80 U/L(P=0.002),gamma-glutamyl transpeptidase>120 U/L(P=0.001),alkaline phosphatase>250 U/L(P=0.001),fasting blood glucose(FBG)≥6.16(mmol/L)(P=0.001)and Child-Pugh class C(P=0.005)were correlated with HCC progression.In multivariate analysis,age≥60 years[hazard ratio(HR)=3.089,95%confidence interval(CI):1.437-6.631,P=0.004],smoking history(HR=4.001,95%CI:1.836-8.716,P<0.01),family history of HBV-related HCC(HR=6.763,95%CI:1.253-36.499,P<0.05),lamivudine resistance(HR=2.949,95%CI:1.207-7.208,P=0.018),HBV DNA negative(HR=0.026,95%CI:0.007-0.139,P<0.01),FBG≥6.16 mmol/L(HR=7.219,95%CI:3.716-14.024,P<0.01)were independent risk factors of HCC progression.ROC of AFP for diagnosis of HCC was 0.746(95%CI:0.674-0.818).A cutoff value of AFP of 9.00 ug/L had a sensitivity of 0.609,and specificity of 0.818 for diagnosing HCC.CONCLUSION Age≥60 years,smoking history,family history of HCC,lamivudine resistance,HBV DNA negative,FBG≥6.16 mmol/L were risk factors of HCC progression.Serum AFP had limited diagnostic value for HCC.

Nucleos(t)ide analogs in the prevention of hepatitis B virus related hepatocellular carcinoma

Hepatocellular carcinoma(HCC) is among the most common cancer types and causes of cancer related mortality worldwide.Almost 50% of all HCC cases globally are attributable to chronic hepatitis B virus(HBV) infection.The incidence rates of HCC in untreated Asian subjects with HBV infection was estimated to be 0.2% in inactive carriers,0.6% for those with chronic hepatitis without cirrhosis,and 3.7% for those with compensated cirrhosis.In Western populations,HCC incidences are reported to be 0.02% in inactive carriers,0.3% in subjects with chronic hepatitis without cirrhosis,and 2.2% in subjects with compensated cirrhosis.Despite effective antiviral treatment options which are able to transform chronic hepatitis into an inactive carrier state,the risk of HCC cannot be fully ruled out to exclude those patients from surveillance.Newer nucleos(t)ide analogues(NAs) as entecavir and tenofovir are very potent in terms of sustained virological suppression which leads to improved liver histology.However,they do not have any influence on the ccc DNA or integrated DNA of HBV in the liver.Nonetheless,viral replication is the only modifiable component among the established risk factors for HBV-related HCC with the current treatment options.In this review,it was aimed to summarize cumulative evidence behind the concept of prevention of HBV related HCC by NAs,and to discuss remaining obstacles to eliminate the risk of HCC.

Nucleos(t)ide analogues to treat hepatitis B virus-related hepatocellular carcinoma after radical resection

Significant advances have been made in nucleos(t)ideanalogue(NA) therapy to treat chronic hepatitis B,and this therapy reduces the risk of hepatitis B virus(HBV)-related hepatocellular carcinoma(HCC) in somepatients.However,whether NAs can also prevent recurrence after radical resection of HBV-related HCC remains controversial and is an important question,giventhat most patients will experience recurrence within afew years of curative surgery.Here we systematicallyreviewed the literature since 2004 on outcomes afteradministering NAs to patients with HBV-related HCCfollowing radical resection.We focused on treatmentindications,duration,effects on recurrence-free survivaland overall survival,and the management of NA resistance.We find that patients with HCC should stronglyconsider NA therapy if they are positive for HBV-DNA,and that the available evidence suggests that postoperative NA therapy can increase both recurrence-free andoverall survival.To minimize drug resistance,cliniciansshould opt for potent analogues with higher resistancebarriers,and they should monitor the patient carefully for emergence of NA-resistant HBV.

Efficacy compared between entecavir and adefovir dipivoxil on HBeAg-positive nucleos(t)ide-naive patients with chronic hepatitis B at week 12 and week 48

Objective:To evaluate the efficacy of entecavir and adefovir dipivoxil on HBeAg-positive nucleos(t)ide-naive patients with chronic hepatitis B with the method of Meta analysis.Methods:We searched PUBMED,EMBASE,CNKI (China National Knowledge Infrastructure),the Cochrane Central Register of Controlled Trials and the Cochrane Database of Systematic Reviews with reference to all data documented before May 2010.The dosage of entecavir and adefovir dipivoxil was 0.5 mg/d and 10 mg/d,respectively.Heterogeneity was examined by Chi-square test,the relative risk calculated and forest plot drawn.Rates of undetected serum HBV DNA,serum alanine aminotransferase (ALT) normalization,HBeAg clearance,HBeAg seroconversion and adverse effect occurrence were analyzed.Results:Six articles were included,which fit well in with this study.Meta analysis showed that the rate of undetected serum HBV DNA(P=0.000 2 at week 12,P=0.002 at week 48)and that of serum ALT normalization(P=0.04 at week 12,P=0.008 at week 48)in the entecavir group were higher than those in the adefovir dipivoxil group.However,no statistic significance existed between the two groups in the rate of HBeAg clearance (P=0.17),the rate of HBeAg seroconversion(P=0.53)or the rate of adverse effect occurrence(P=0.92)at week 48.Conclusion:Entecavir was superior to adefovir dipivoxil in decreasing serum HBV DNA and normalizing serum ALT in the HBeAg-positive nucleos(t)ide-naive patients with chronic hepatitis B.

Nationwide cohort study suggests that nucleos(t)ide analogue therapy decreases dialysis risk in Taiwan Residents chronic kidney disease patients acquiring hepatitis B virus infection

AIM To investigate the risk of end-stage renal disease(ESRD) in hepatitis B virus(HBV)-infected patients with chronic kidney disease(CKD) with and without nucleos(t)ide analogue(NA) therapy.METHODS This nationwide cohort study included 103444 Taiwan Residents CKD adults without hepatitis C virus infection from the Taiwan Longitudinal Health Insurance Database 2005 between 1997 and 2012. We identified 2916 CKD patients who acquired HBV infection and did not receive NAs(untreated cohort), and they were propensitymatched 1:4 with 11664 uninfected counterparts. We also identified 442 CKD patients who acquired HBV infection and received NAs(treated cohort), and they were propensity-matched 1:3 with 1326 untreated counterparts. The association between HBV infection, NA use, and ESRD was analyzed using competing risk analysis.RESULTS Multivariable Cox regression analysis showed a 1.67-fold higher risk(P < 0.0001) of ESRD in the untreated cohort(16-year cumulative incidence, 10.1%) than in the matched uninfected cohort(16-year cumulative incidence, 6.6%), which was independent of cirrhosis or diabetes. The treated cohort(16-year cumulative incidence, 2.2%) had an 87% lower ESRD risk(P < 0.0001) compared with the matched untreated cohort(16-year cumulative incidence, 11.9%). The number needed to treat for one fewer ESRD after NA use at 12 years was 12. Multivariable stratified analyses verified these associations in all subgroups.CONCLUSION This study suggests that untreated HBV infection and NA therapy are associated with increased and decreased risk of ESRD, respectively, in CKD patients. Identification of HBV status and targeted monitoring for ESRD development are important in CKD patients living in HBV-endemic areas.

Exploration of nucleos(t)ide analogs cessation in chronic hepatitis B patients with hepatitis B e antigen loss

BACKGROUND Nucleos(t)ide analogs(NAs)cessation in chronic hepatitis B(CHB)patients remains a matter of debate in clinical practice.Current guidelines recommend that patients with hepatitis B e antigen(HBeAg)seroconversion discontinue NAs after relatively long-term consolidation therapy.However,many patients fail to achieve HBeAg seroconversion after the long-term loss of HBeAg,even if hepatitis B surface antigen(HBsAg)loss occurs.It remains unclear whether NAs can be discontinued in this subset of patients.AIM To investigate the outcomes and factors associated with HBeAg-positive CHB patients with HBeAg loss(without hepatitis B e antibody)after cessation of NAs.METHODS We studied patients who discontinued NAs after achieving HBeAg loss.The Cox proportional hazards model was used to identify predictors for virological relapse after cessation of NAs.The cut-off value of the consolidation period was confirmed using receiver operating characteristic curves;we confirmed the cut-off value of HBsAg according to a previous study.The log-rank test was used to compare cumulative relapse rates among groups.We also studied patients with CHB who achieved HBeAg seroconversion and compared their cumulative relapse rates.Propensity score matching analysis(PSM)was used to balance baseline characteristics between the groups.RESULTS We included 83 patients with HBeAg loss.The mean age of these patients was 32.1±9.5 years,and the majority was male(67.5%).Thirty-eight patients relapsed,and the cumulative relapse rate at months 3,6,12,24,36,60,120,and 180 were 22.9%,36.1%,41.0%,43.5%,45.0%,45.0%,45.0%,and 52.8%,respectively.Twentysix(68.4%)patients relapsed in the first 3 mo after NAs cessation,and 35 patients(92.1%)relapsed in the first year after NAs cessation.Consolidation period(≥24 mo vs<24 mo)(HR 0.506,P=0.043)and HBsAg at cessation(≥100 IU/mL vs<100 IU/mL)(HR 14.869,P=0.008)were significant predictors in multivariate Cox regression.In the PSM cohort,which included 144 patients,there were lower cumulative relapse rates in patients with HBeAg seroconversion(P=0.036).CONCLUSION HBeAg-positive CHB patients with HBeAg loss may be able to discontinue NAs therapy after long-term consolidation,especially in patients with HBsAg at cessation<100 IU/mL.Careful monitoring,especially in the early stages after cessation,may ensure a favorable outcome.

Nationwide retrospective study of hepatitis B virological response and liver stiffness improvement in 465 patients on nucleos(t)ide analogue

BACKGROUND Hepatitis B virus(HBV)nucleos(t)ide analog(NA)therapy reduces liver disease but requires prolonged therapy to achieve hepatitis B surface antigen(HBsAg)loss.There is limited North American real-world data using non-invasive tools for fibrosis assessment and few have compared 1st generation NA or lamivudine(LAM)to tenofovir disoproxil fumarate(TDF).AIM To assess impact of NA on virological response and fibrosis regression using liver stiffness measurement(LSM)(i.e.,FibroScan®).METHODS Retrospective,observational cohort study from the Canadian HBV Network.Data collected included demographics,NA,HBV DNA,alanine aminotransferase(ALT),and LSM.Patients were HBV monoinfected patients,treatment naïve,and received 1 NA with minimum 1 year follow-up.RESULTS In 465(median 49 years,37%female,35%hepatitis B e antigen+at baseline,84%Asian,6%White,and 9%Black).Percentage of 64(n=299)received TDF and 166 were LAM-treated with similar median duration of 3.9 and 3.7 years,respectively.The mean baseline LSM was 11.2 kPa(TDF)vs 8.3 kPa(LAM)(P=0.003).At 5-year follow-up,the mean LSM was 7.0 kPa in TDF vs 6.7 kPa in LAM(P=0.83).There was a significant difference in fibrosis regression between groups(i.e.,mean-4.2 kPa change in TDF and-1.6 kPa in LAM,P<0.05).The last available data on treatment showed that all had normal ALT,but more TDF patients were virologically suppressed(<10 IU/mL)(n=170/190,89%)vs LAM-treated(n=35/58,60%)(P<0.05).None cleared HBsAg.CONCLUSION In this real-world North American study,approximately 5 years of NA achieves liver fibrosis regression rarely leads to HBsAg loss.

On-treatment quantitative hepatitis B e antigen predicted response to nucleos(t)ide analogues in chronic hepatitis B

AIMTo investigate potential predictors for treatment response to nucleos(t)ide analogues (NAs) in hepatitis B e antigen (HBeAg)-positive chronic hepatitis B (CHB) patients. METHODSSeventy-six HBeAg-positive CHB patients received 96-wk NAs optimized therapy (lamivudine and adefovir dipivoxil) were studied retrospectively. Serum hepatitis B surface antigen, HBeAg, hepatitis B core antibody, hepatitis B virus (HBV) DNA and alanine aminotransferase levels were quantitatively measured before and during the treatment at 12 and 24 wk. Stepwise logistic regression analyses were performed to identify predictors for treatment response, and areas under the receiver operating characteristic curves (AUROC) of the independent predictors were calculated. RESULTSForty-three CHB patients (56.6%) achieved virological response (VR: HBV DNA &le; 300 copies/mL) and 15 patients (19.7%) developed HBeAg seroconversion (SC) after the 96-wk NAs treatment. The HBeAg level (OR = 0.45, P = 0.003) as well as its declined value (OR = 2.03, P = 0.024) at 24-wk independently predicted VR, with the AUROC of 0.788 and 0.736, respectively. The combination of HBeAg titer 1.6 lg PEIU/mL at 24-wk predicted VR with a sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) of 85%, 100%, 100% and 83%, respectively, and the AUROC increased to 0.923. The HBeAg level (OR = 0.37, P = 0.013) as well as its declined value (OR = 2.02, P = 0.012) at 24-wk also independently predicted HBeAg SC, with the AUROC of 0.828 and 0.814, respectively. The HBeAg titer 2.2 lg PEIU/mL at 24-wk predicted HBeAg SC with a sensitivity, specificity, PPV, NPV of 88%, 98%, 88% and 98%, respectively, and the AUROC reached 0.928. CONCLUSIONThe combination of HBeAg level and its declined value at 24-wk may be used as a reference parameter to optimize NAs therapy.

Treatment of HBeAg-Negative Chronic Hepatitis B Patients with Nucleos(t)ide Analogues in Burkina Faso

The treatment of chronic hepatitis B (CHB) has increased significantly in recent years. In patients affected by HBeAg-negative CHB, it is necessary to distinguish the inactive carriers (low viral DNA 2000 IU/mL, normal ALT, histological lesions absent or minimal) who does not need treatment, and patients suffering from active CHB (DNA > 2000 IU/ml, high transaminases or fluctuating, significant fibrosis and/or necro-inflammatory activity > 1) who must be treated. The main purpose of treatment is to obtain a long-lasting viral suppression to improve the histological lesions and reduce the risk of evolution towards cirrhosis, liver failure and hepatocellular carcinoma (HCC). It about an indefinite treatment (unless HBsAg seroclearance) expensive and often inaccessible for the majority of our patients. Our study aimed to report the results of four years follow-up of HBeAg-negative patients treated by Nucleos(t)ide analogues (NAs) in Ouagadougou (Burkina Faso). It was a clinical observational study with 133 patients including 95 men;the average age was 41.2 years, completing the criteria of treatment. One hundred and twelve patients were treated by tenofovir (TDF), fourteen by lamivudine and seven co-infected HIV/HBV patients by Atripla® (combination TDF, Emtricitabine and Efavirenz). Virological and biochemical responses were respectively 100% and 94% after 4 years. The rate of HBsAg seroclearance was 1.5%. Twelve of fourteen patients (85.7%) had lamivudine resistance and no cases of resistance in the TDF and Atripla® groups. One co-infected patient developed HCC during treatment. Among patients treated by TDF, two cases of hypophosphatemia were noticed and no case of kidney failure. The treatment of CHB is certainly progressing;updated guidelines (EASL, AASLD) exist but should be adapted to the African context.

Antiviral therapy with nucleos(t)ide analogues for severe chronic hepatitis B

To the Editor:I read the paper by Chen et al[1]with great interest.The authors performed a retrospective study to evaluate the short-term efficacy of antiviral therapy with

Early renal injury indicators can help evaluate renal injury in patients with chronic hepatitis B with long-term nucleos(t)ide therapy

BACKGROUND Patients with chronic hepatitis B(CHB)with long-term nucleos(t)ide therapy may experience renal insufficiency.Traditional renal function indicators,such as urine protein,serum urea nitrogen(BUN),and serum creatinine,are normal when early mild lesions occur.Therefore,more sensitive renal function indicators are needed.AIM To investigate the significance of early renal injury indicators in evaluating renal injury in patients with CHB with long-term nucleos(t)ide therapy.METHODS We collected the clinical data of 69 outpatients with CHB at Peking University First Hospital from March 2018 to January 2020 who had been treated with longterm nucleos(t)ide therapy and analyzed the results of early renal injury indicators.Continuous normal distribution data were analyzed by the t-test to determine the difference between two groups.Continuous non-normally distributed data were analyzed by the Mann-Whitney U-test between two groups.The Kruskal-Wallis H test was used to determine the differences among multiple groups.Enumeration data were analyzed by the chi-square test.The related factors of early renal injury indicators were analyzed by logistic regression analysis.RESULTS The average treatment duration with nucleos(t)ide analogs of the 69 patients with CHB was 99.7±28.7 mo.The cases of patients with elevated BUN and hypophosphatemia were 6(8.7%)and 13(18.8%),respectively;31(44.9%)patients had abnormal early renal injury indicators,including 9 patients with abnormal urine microalbumin,7 patients with abnormal urine immunoglobulin,6 patients with abnormal urine transferrin,and 19 patients with abnormalα1 microglobulin.There were no significant differences in the mean values of age,sex,BUN,estimated glomerular filtration rate(eGFR),serum uric acid,serum calcium,or serum phosphorus between the two groups of patients with and without early renal injury indicators.However,the mean levels of serum creatinine and urine creatinine,N-acetyl-β-D-glucosidase enzyme,α1 microglobulin,and urine immunoglobulin in the former group of patients were significantly higher than those in the latter group of patients(P<0.05).The incidence of early renal injury in patients with eGFR≥90,60-89,and 30-59 mL/(min·1.73 m2)was 36.4%(8/22),47.6%(20/42),and 60%(3/5),respectively.Logistic regression analysis results showed that gamma-glutamyl transpeptidase[odds ratio(OR)=1.05(1.008-1.093),P=0.020],direct bilirubin[OR=1.548(1.111-2.159),P=0.010],serum creatinine[OR=1.079(1.022-1.139),P=0.006],and age[OR=0.981(0.942-1.022),P=0.357]were independent predictors of early renal injury.CONCLUSION Patients with CHB treated with long-term nucleos(t)ide analog therapy had a high probability of early renal injury,and early renal injury indicators were highly sensitive and could be used to monitor early renal impairment.

Chinese Consensus on Antiviral Treatment of Chronic Hepatits B Patients with Nucleos(t)ide Analogues

Antiviral treatment is the main method for chronic hepatitis B(CHB).After antiviral treatment,some patients may obtain satisfactory therapeutic effect,but some patients still show primary non-response,suboptimal response,even resistance to nucleos(t)ide analogues or relapse,which are becoming the key problems and confusing the clinical staffs.Thus,in January 2013,editorial department of Chinese Journal of Experimental and Clinical Infectious Diseases(Electronic Edition),Chinese Journal of Liver Diseases(Electronic Edition)