Prospective Study Outreach onsite treatment with a simplified pangenotypic directacting anti-viral regimen for hepatitis C virus microelimination in a prison

Chun-Ting Chen,Ming-Ying Lu,Meng-Hsuan Hsieh,Pei-Chien Tsai,Tsai-Yuan Hsieh,Ming-Lun Yeh,Ching-I Huang,Yi-Shan Tsai,Yu-Min Ko,Ching-Chih Lin,Kuan-Yu Chen,Yu-Ju Wei,Po-Yao Hsu,Cheng-Ting Hsu,Tyng-Yuan Jang,Ta-Wei Liu,Po-Cheng Liang,Ming-Yen Hsieh,Zu-Yau Lin,Chung-Feng Huang,Jee-Fu Huang,Chia-Yen Dai,Wan-Long Chuang,Yu-Lueng Shih,Ming-Lung Yu

Chun-Ting Chen,Yu-Lueng Shih,Division of Gastroenterology and Hepatology,Department of Internal Medicine,Tri-Service General Hospital Penghu Branch,National Defense Medical Center,Penghu County 88041,Taiwan

Chun-Ting Chen,Tsai-Yuan Hsieh,Yu-Lueng Shih,Division of Gastroenterology and Hepatology,Department of Internal Medicine,Tri-Service General Hospital,National Defense Medical Center,Taipei 11490,Taiwan

Ming-Ying Lu,Meng-Hsuan Hsieh,Pei-Chien Tsai,Ming-Lun Yeh,Ching-l Huang,Yi-Shan Tsai,Yu-Min Ko,Ching-Chih Lin,Kuan-Yu Chen,Yu-Ju Wei,Po-Yao Hsu,Cheng-Ting Hsu,Tyng-Yuan Jang,Ta-Wei Liu,Po-Cheng Liang,Ming-Yen Hsieh,Zu-Yau Lin,Chung-Feng Huang,Jee-Fu Huang,Chia-Yen Dai,Wan-Long Chuang,Ming-Lung Yu,Division of Hepatobiliary,Department of Internal Medicine and Hepatitis Center,Kaohsiung Medical University Hospital,Kaohsiung 80708,Taiwan

Meng-Hsuan Hsieh,Ming-Lun Yeh,Ching-l Huang,Yi-Shan Tsai,Yu-Min Ko,Ching-Chih Lin,Kuan-Yu Chen,Yu-Ju Wei,Po-Yao Hsu,Cheng-Ting Hsu,Tyng-Yuan Jang,Ta-Wei Liu,Po-Cheng Liang,Ming-Yen Hsieh,Zu-Yau Lin,Chung-Feng Huang,Jee-Fu Huang,Chia-Yen Dai,Wan-Long Chuang,Ming-Lung Yu,School of Medicine and Hepatitis Research Center,College of Medicine,and Center for Liquid Biopsy and Cohort Research,Kaohsiung Medical University,Kaohsiung 80708,Taiwan

Ming-Lung Yu,National Pingtung University of Science and Technology,Pingtung 912,Taiwan

Abstract BACKGROUND Prisoners are at risk of hepatitis C virus (HCV) infection,especially among the people who inject drugs (PWID).We implemented an outreach strategy in combination with universal mass screening and immediate onsite treatment with a simplified pan-genotypic direct-acting antivirals (DAA) regimen,12 wk of sofosbuvir/velpatasvir,in a PWID-dominant prison in Taiwan.AIM To implement an outreach strategy in combination with universal mass screening and immediate onsite treatment with a simplified pan-genotypic DAA regimen in a PWID-dominant prison in Taiwan.METHODS HCV-viremic patients were recruited for onsite treatment program for HCV micro-elimination with a pangenotypic DAA regimen,12 wk of sofosbuvir/velpatasvir,from two cohorts in Penghu Prison,either identified by mass screen or in outpatient clinics,in September 2019.Another group of HCV-viremic patients identified sporadically in outpatient clinics before mass screening were enrolled as a control group.The primary endpoint was sustained virological response (SVR12,defined as undetectable HCV ribonucleic acid (RNA) 12 wk after end-of-treatment).RESULTS A total of 212 HCV-viremic subjects were recruited for HCV micro-elimination campaign;91 patients treated with sofosbuvir/Ledipasvir or glecaprevir/pibrentasvir before mass screening were enrolled as a control.The HCV microelimination group had significantly lower proportion of diabetes,hypertension,hyperlipidemia,advanced fibrosis and chronic kidney diseases,but higher levels of HCV RNA.The SVR12 rate was comparable between the HCV microelimination and control groups,95.8% (203/212) vs 94.5% (86/91),respectively,in intent-to-treat analysis,and 100% (203/203) vs 98.9% (86/87),respectively,in perprotocol analysis.There was no virological failure,treatment discontinuation,and serious adverse event among sofosbuvir/velpatasvir-treated patients in the HCV micro-elimination group.CONCLUSION Outreach mass screening followed by immediate onsite treatment with a simplified pangenotypic DAA regimen,sofosbuvir/velpatasvir,provides successful strategies toward HCV micro-elimination among prisoners.

Key Words:Direct-acting antivirals;Sofosbuvir;Velpatasvir;People who inject drugs;Universal screen

lNTRODUCTlON

Hepatitis C virus (HCV) infection is a progressive and blood-borne infectious disease that can lead to end stage liver diseases,such as hepatic decompensation,liver cirrhosis,and hepatocellular carcinoma[1,2].Iatrogenic transmission of HCV,such as blood transfusion and surgery,has decreased in developed countries.Whereas people who inject drugs (PWID) has become the major population of HCV transmission,which could consist of approximately 80% of HCV-infected patients[3].Given that lack of vaccine available,“treatment as prevention”for HCV transmission in PWID is very important for HCV elimination.

Prisoners are at high risk of HCV infection,with prevalence rates ranging from 3.1%to 38%[4,5].The high prevalence of HCV infection in prisoners is resulted from unsafe lifestyles,psychiatric disorders,and social problems before they are incarcerated.Recently,PWID has been the most important risk factor of HCV infection in prisoners[6].The anti-HCV prevalence rate could be as high as 91% among PWID prisoners[7].Screening and eliminating HCV infection in prisoners is therefore an important social health issue.

According to the American Association for the Study of Liver Diseases and European Association for the Study of the Liver (EASL) guidelines,all HCV viremic patients should be treated if life span is expected more than one year[8,9].HCV therapeutic strategies have been revolutionized significantly because of the availability of direct-acting antivirals (DAA)[10].Interferon (IFN)-based regimens for HCV infection have serious side effects,long therapeutic duration,and contraindications,leading to the huge gaps in HCV care cascade[11].The current IFN-free DAA regimens provide shorter treatment duration,very high treatment efficacy and safety profiles,not only for general population[12],but also for special populations[13],such as HCV/human immunodeficiency virus (HIV) coinfected patients,hepatitis B virus(HBV)/HCV coinfected patients and patients with chronic kidney diseases in realworld clinical settings[14,15].

World Health Organization (WHO) set a global goal of HCV elimination by 2030[16],and Taiwan authority is even ambitious by 2025[17].To achieve the goal,implementation of the concept of HCV micro-elimination is regarding as an efficient and practical strategy[18].We have proved that“universal mass screening plus outreach onsite treatment”is the key to achieve HCV micro-elimination among patients under maintenance hemodialysis[19].

Recently,the latest EASL HCV guideline recommended simplified,genotyping/subtyping-free,pangenotypic anti-HCV treatment,either sofosbuvir/ velpatasvir or glecaprevir/pibrentasvir,to increase the accessibility and global cure rates among patients with ＞ 12 years,chronic hepatitis C without cirrhosis or with compensated cirrhosis,with or without HIV co-infection,whatever treatment-na?ve or IFNexperienced[8].

Since HCV treatment is not frequently administered to prisoners due to unawareness of HCV infection,difficultly management,easily loss to follow-up,and lack of hepatologist in prison[20],collaboration between hepatologists and prison authorities to carry out strategies for HCV diagnosis and treatment in prisoners in highly demanded.Herein,we implemented an outreach strategy in combination with universal mass screen and onsite treatment with a simplified pan-genotypic DAA regimen,12 wk of sofosbuvir/velpatasvir,toward HCV micro-elimination in a PWIDdominant prison in Taiwan.

MATERlALS AND METHODS

Patients linked to onsite treatment program for HCV micro-elimination

HCV-viremic patients were recruited from two cohorts in Penghu Prison (Agency of Corrections,Ministry of Justice,Taiwan),a PWID-dominant prison (Figure 1).

Figure 1 Patient flowchart of hepatitis C virus treatment with a simplified pan-genotypic directly-acting antivirals regimen in Penghu Prison.HCV:Hepatitis C virus;DAA:Directly-acting antivirals;SOL/VEL:Sofosbuvir/velpatasvir;GEL/PIB:Glecaprevir/pibrentasvir;EOTVR:Virological response at end-of-treatment;SVR12:Sustained viral response at post-treatment wk 12.

HCV-viremic patients identified by a universal mass screening

In September 2019,we conducted a 5 d universal mass screening of viral hepatitis in Penghu Prison.These inclusion criteria were prisoners,who were at least 20 years old,being willing to enter the study for screening of viral hepatitis.The study of mass screening was approved by the Institutional Review Board of Kaohsiung Medical University Hospital (IRB:KMUHIRB-SV(I)-20190033).All participants provided written informed consents.A total of 1137 subjects from 1697 inmates participated the mass screening[21].Among them,396 (34.8%) subjects had anti-HCV seropositivity;208 (52.5%) of the 396 subjects were seropositive for HCV ribonucleic acid (RNA) and linked to the onsite HCV treatment program with universal sofosbuvir/velpatasvir regimen.

HCV-viremic patients identified in outpatient clinics during the period of HCV mass screening

Another 26 HCV-viremic subjects identified in outpatient clinics of Penghu Prison between August to December 2019 were also linked to the onsite HCV treatment program with universal sofosbuvir/velpatasvir regimen.

All patients received pretreatment evaluation in December 2019,including medical history,liver and renal function tests,complete blood cell counts,HCV viral loads and genotyping,abdominal sonography and assessment of potential drug-drug interactions.A 12 wk,oral pan-genotypic regimen of sofosbuvir/velpatasvir 400/100 mg fixed-dose combination once daily was initiated in January-February 2020.

Patients identified and treated by DAAs in outpatient clinics before mass screening

A total of 91 HCV-viremic patients identified in outpatient clinics of Penghu Prison and treated with DAA before mass screening from 2017 to 2019 were enrolled as a control.The selection of DAA regimens were based on physician’s discretion according to the viral genotype and criteria of reimbursement of National Health Insurance Administration,Taiwan.All patients received pretreatment evaluation,including medical history,liver and renal function tests,complete blood cell counts,HCV viral loads and genotyping,abdominal sonography and assessment of potential drug-drug interactions.

All participants signed informed consent forms.These enrolled inmates of our study were protected according to the guidelines of the Declaration of Helsinki.The current study of DAA therapy was approved by the Institutional Review Board of Tri-Service General Hospital (IRB:TSGHIRB 2-107-05-080).

Assessment,monitoring and endpoints

Anti-HCV antibody was determined by the third generation,commercially available immunoassay (Ax SYM HCV III;Abbott Laboratories,North Chicago,IL).HCV RNA viral loads and genotype were determined by real-time PCR assays [RealTime HCV;Abbott Molecular,Des Plaines IL,United States;detection limit:12 IU/mL])[22].Liver cirrhosis was defined by the presence of clinical,radiological,endoscopic or laboratory evidence of cirrhosis and/or portal hypertension or fibrosis-4 index (FIB-4) (＞ 6.5).Laboratory data monitoring and assessment of side effects were performed at treatment wk 2,4,8 and end-of-treatment (EOT),and 12 wk after EOT.

The primary endpoint was sustained virological response (SVR12,defined as undetectable HCV RNA throughout 12 wk of the post-treatment follow-up period).

Statistical analyses.

The efficacy of all DAA regimens was determined in a intent-to-treat (ITT) population(all enrolled patients with at least one dose of DAA) and a per-protocol (PP)population (subjects receiving at least one dose of DAA and retained in Penghu Prison throughout the DAA treatment and follow-up period).Safety assessments reported adverse event (AE),serious adverse event (SAE) and laboratory abnormalities in the ITT population.Continuous variables are expressed as means ± standard deviation(SD),and categorical variables are expressed as percentages.The differences of continuous variables are estimated by the Student’sttest.The differences in categorical variables are analyzed using the Chi-square test.The on-treatment and offtreatment virological response rates were analyzed in number and percentages with 95% confidence interval (CI).All data analyses were performed using the SPSS software version 18.0 (SPSS Inc.,Chicago,Illinois,United States).

RESULTS

Patient flowchart of HCV micro-elimination campaign

The patient flowchart of HCV mass screen,assessment and treatment was shown in Figure 1.A total of 234 HCV-viremic patients,208 from mass screening and 26 from outpatient clinics in Penghu Prison were assessed for eligibility of group therapy with sofosbuvir/velpatasvir in December 2019.Twenty-two patients were excluded from anti-HCV therapy due to scheduled to be released from jail (n=16) or transferred to other jails (n=3) within 6 mo,unwilling to receive therapy (n=2) and prior glecaprevir/pibrentasvir treatment failure (n=1).Finally,212 patients were recruited for sofosbuvir/velpatasvir therapy initiated in January-February 2020.

Patient characteristics

The baseline characteristics of 303 HCV-viremic patients,including 212 in HCV microelimination campaign and 91 sporadic controls from outpatient clinics before microelimination campaign were listed in Table 1.They mean age was 48.4 years with male dominant (99.7%).Thirty (9.9%) had HBV coinfection.The mean FIB-4 was 1.3,with 20(6.6%) had advanced fibrosis (FIB-4 ＞ 3.25).Only one patient (0.3%) had liver cirrhosis.The mean HCV RNA levels was 6.5 Logs IU/mL,dominant with HCV genotype 1(HCV-GT1,42.2%),followed by HCV-GT6 (35.3%),HCV-GT3 (11.6%) and HCV-GT2(10.6%).Three (1%) patients were prior IFN-experienced.The two groups had comparable characteristics in terms of age,gender,HBV co-infection,liver and renal function tests,FIB-4 score,HCV genotype distribution,and prior history of IFN-based therapy.However,the sporadic patients identified in outpatient clinics had significantly higher proportion of comorbidities,including diabetes,hypertension,hyperlipidemia and an estimated glomerular filtration rate (eGFR) ＜ 60 mL/min/1.73 m2,but significantly lower HCV viral loads.None of patient had decompensated cirrhosis nor liver cancer.

Treatment efficacy

All of 212 patients in HCV micro-elimination campaign received sofosbuvir/velpatasvir treatment;while among 91 sporadic patients with DAA therapy before HCV micro-elimination campaign,78 (85.7%) received 12 wk of sofosbuvir/Ledipasvir and 13 (14.3%) received 8-12 wk of glecaprevir/pibrentasvir according to the Taiwan HCV guideline[12,13].

In ITT analysis,the overall SVR12 rate was 95.4% (289/303) with comparable SVR12 rates between sporadic HCV control group (94.5%,86/91) and HCV micro-elimination group (95.8%,203/212,P=0.126,Table 2).

During DAA treatment period,all of patients in sporadic HCV control group completed DAA therapy,while 3 patients in HCV micro-elimination group lost-tofollow (2 transferred;1 released).During the post-treatment follow-up period,4 patients in sporadic HCV control group lost-to-follow (4 released),while 6 patients in HCV micro-elimination group lost-to-follow (2 transferred;4 released).In PP analysis,the overall SVR12 rate was 99.7% (289/290) with comparable SVR12 rates betweensporadic HCV control group (98.9%,86/87) and HCV micro-elimination group (100%,203/203,P=0.126,Table 2).Only one patient experienced virological failure (54 years old male,treatment-na?ve,HCV-GT3 infection with baseline viral loads of 62,883 IU/mL and FIB-4 of 2.37;relapsed from a 12 wk regimen of glecaprevir/pibrentasvir).

Table 1 Baseline characteristics of hepatitis C virus-infected patients receiving directly-acting antivirals therapy between sporadic hepatitis C virus therapy in outpatient clinics and campaign of hepatitis C virus micro-elimination in Penghu prison

Table 2 Virological responses of hepatitis C virus-infected patients receiving directly-acting antivirals therapy before and during campaign of hepatitis C virus micro-elimination in Penghu prison in Penghu prison

Safety profiles

The safety profiles of both groups were shown in Table 3.None of patients had treatment discontinuation other than released or transferred.None experienced serious adverse event.The frequency of adverse events was 4.3% (4/91) and 1.4%(3/212),respectively,among patients in sporadic control group and HCV microelimination group.The most reported adverse events were rash in 3 of 13 (23.1%)patients treated with glecaprevir/pibrentasvir and pruritus in 2 of 212 (0.9%) patients treated with sofosbuvir/velpatasvir.None of patients experienced grade 3 or 4 Laboratory abnormality.

Table 3 Safety profiles of hepatitis C virus-infected patients receiving direct-acting antivirals therapy in Penghu prison

DlSCUSSlON

In the current study,we demonstrated that mass screening combined with onsite group therapy by using a simplified pan-genotypic DAA regimen,12 wk of sofosbuvir/velpatasvir,provides an“one-size fits all”solution toward the achievement of HCV micro-elimination in prisoners.The SVR rate was 95.6% in ITT population and 100% in PP population after excluding the inmates released or transferred before end-of-follow-up.The high SVR rate was observed in this PWIDdominant population,which HCV genotype distribution was diverse,including genotypes 1a,1b,2,3 and 6.

Recent advance in the development of IFN-free pan-genotypic DAA regimens has remarkably improved the treatment efficacy with an overall SVR rates of ＞ 90%.Therefore,WHO set the global of HCV elimination by 2030,through the achievement of ＞ 90% diagnosis rate and ＞ 80% treatment rate for eligible patients[16].Nevertheless,there are many barriers in each HCV care cascade toward HCVelimination at the population level[11,23].To overcome the barriers,combining the concept of micro-elimination and an outreach strategy with immediate onsite treatment would be a more efficient and practical approach to achieve that goal[18,24].The current study compared the HCV-infected inmates identified sporadically in outpatient clinics of Penghu Prison from 2017 to 2019 before mass screening and the patients identified by mass screening.We found that mass screening identified 208 HCV-viremic patients in a 5 d screening program from 1137 inmates (encountered around two-third of total inmates in Penghu Prison),compared to 91 HCV-viremic inmates treated in outpatient clinics from 2017 to September 2019.Our results demonstrated that mass screening with immediate onsite treatment provide much more efficient and practical solution to overcome the gaps of disease awareness and link-to-care in the HCV care cascades toward HCV micro-elimination in prisoners.In addition,we implemented“HCV reflex testing”in the mass screening program to scale-up and speed-up the diagnosis and link-to-care for treatment uptake of HCV infections[25].

PWID is known as the major risk factor of HCV infection and transmission.Although the anti-HCV prevalence in PWID prisoners decreased from 91% in 2014 to 34.8% in 2019 by the strategy of safe injection in Taiwan[21],almost all (97.6%) of HCV-infected prisoners were PWID.Given the lack of vaccine available and high risk of transmission,the strategy of universal screening and concept of“treatment as prevention”are the keys to HCV elimination in prison as well as PWID.

We observed that the sporadic HCV-infected prisoners identified in outpatient clinics had significantly higher proportion of comorbidities,including diabetes,hypertension,hyperlipidemia and eGFR,than those participating in the HCV microelimination campaign.It implicated that a great proportion of identified sporadically in outpatient clinics were due to concomitant morbidities;by contrast,many HCVinfected patients were unaware to their HCV diseases.In our mass screening,only 36.6% (145/396) of HCV-infected prisoners were aware of HCV infection before screening[21].It indicates that the implementation of an outreach strategy with universal mass screen is necessary for HCV micro-elimination in prison.

Despite of the advances in the management of HCV infections,DAA therapy in incarcerated HCV-infected people remains many obstacles to be resolved,including disease unawareness,lack of updated information about the benefits of new DAA treatment,uncertainty of treatment right[26],poor accessibility due to of onsite treatment facilities or HCV treaters.Another difficulty for HCV treatment in prisoners is the unexpected or scheduled releasing from prison or transferring to other prisons,which frequently leads to the interruption of treatment or lost-to-follow up[20,27].We are lucky that the Taiwan Health Insurance covered all incarcerated people,including all of the laboratory tests and ultrasound sonography and the cost of DAA regimens.Each prison has a contracted hospital providing point-of-care facility.Before initiating DAA therapy,we excluded the patients with expected release or transfer within 24 wk,and negotiated with the authority to avoid unnecessary transferring to other prisons during the period of HCV treatment and follow-up once the inmates entering the DAA course.Eventually we achieved a high treatment rate of 90.6% (212/234) and a high treatment complete rate of 95.8% (203/212),with a high cure rate at 100%(212/212).

Before the IFN-free DAA available,the lower SVR rate,much longer treatment duration and frequent adverse events of IFN-based treatment discouraged HCVinfected prisoners from receiving treatment[10].IFN-free DAA regimens revolutionized HCV treatment which has largely extended the indication for various HCVinfected patients.Nevertheless,the application of typical DAA regimens are based on HCV genotype,presence of decompensated cirrhosis,renal function,and prior treatment experience.The two pangenotypic DAA regimens,sofosbuvir/velpatasvir,and glecaprevir/pibrentasvir,have achieved very high SVR rates of ＞ 95%,regardless of HCV GTs,except for treatment-experienced cirrhotic HCV GT3 patients or GT3b patients[8,12,13].Recently,to improve the access to anti-HCV therapy,reduce the cost of laboratory tests and the relative complexity of genotype-based treatment strategies,simplified treatment without many information needed for treatment decision are recommended to facilitate the care cascade among populations who are historically less engaged in healthcare,such as PWIDs and prisoners[8].EASL recommends simplified,genotyping/subtyping-free regimens for IFN-free DAA treatment-na?ve(except sofosbuvir plus ribavirin),HCV-infected or HCV-HIV coinfected adolescent and adult patients without cirrhosis or with compensated cirrhosis,regardless of HCV genotypes[8].These recommendations are a universal 12 wk regimen of sofosbuvir/velpatasvir for all patients or glecaprevir/pibrentasvir,8 wk for non-cirrhotic,12 wk for compensated cirrhotic,and 16 wk for HCV GT3 patients,respectively.There are only four information needed before treatment,including the presence of HCV viremia,potential drug-drug interactions,and prior treatment experience,and presence of cirrhosis.The advantages of glecaprevir/pibrentasvir is a shorter 8 wk regimen for treatment-na?ve HCV patients and IFN-experienced non-cirrhotic patients with compensated liver diseases,which would be benefit for prisoners who are expected to be released or transferred in a short term.However,glecaprevir,a protease inhibitor,is contraindicated for patients with hepatic decompensation and at risk for rare occurrence of serious drug-induced liver injury[28].Also,glecaprevir/pibrentasvir has higher pill burden,three tablets a d.The advantages of sofosbuvir/velpatasvir include a universal fixed 12 wk regimen,one tablet a d,for all HCV patients with compensated liver diseases,less frequency of potential drug-drug interactions[29],and safety for those with hepatic decompensation.However,a 12 wk regimen with sofosbuvir/velpatasvir needs one more visit and monitoring when compared to an 8 wk regimen with glecaprevir/pibrentasvir.Therefore,we select sofosbuvir/velpatasvir as the antiviral regimen for our outreach onsite treatment.In our study,all HCV-viremic prisoners fit the criteria of simplified,genotyping/subtyping-free regimens,except one who failed to prior glecaprevir/pibrentasvir therapy and was not enrolled for sofosbuvir/velpatasvir treatment.In our PP analysis,the overall SVR12 rate was comparable between HCV patient group (98.9%,86/87)and HCV micro-elimination group (100%,203/203).Our study provided evidence for the concept that simplified,genotyping/subtyping-free regimens can achieve high SVR12 rate in HCV-infected PWID-dominant prisoners.

In our study,none of prisoners had DAA treatment discontinuation due to adverse events.None experienced serious adverse event.These data indicated that the simplified,genotyping/subtyping-free regimen,sofosbuvir/velpatasvir,was safe and well tolerated for HCV-infected PWID-dominant prisoners.Very few adverse events were reported in both groups,whatever using sofosbuvir/Ledipasvir,glecaprevir/pibrentasvir and sofosbuvir/velpatasvir,when compared to the data from clinical trials[30,31].It might be due to that current population was younger and less patients with advanced fibrosis or chronic kidney diseases.

There were some limitations in our study.First,not all inmates in Penghu Prison participated our mass screening.Strategies and policy to encourage inmates to receive HCV screening is mandatory to achieve the goal of WHO.Second,unexpected prisoners’ transferral and release could not be completely avoided,which caused incomplete treatment and follow-up.Successfully linking the released or transferred people to another HCV treaters could help completing HCV treatment and follow-up.Third,there was no reimbursement for the retreatment of prior DAA failed patients in Taiwan at the time of the current study.

CONCLUSlON

Well-designed strategies for mass screening and treatment for HCV-infected prisoners can be implemented successfully by the collaboration between physicians and prison authorities.We demonstrated that mass screening followed by immediate onsite treatment with a simplified pangenotypic DAA regimen,sofosbuvir/velpatasvir,provides successful strategies toward HCV micro-elimination among prisoners.

ARTlCLE HlGHLlGHTS

Research background

Prisoners are at high risk of hepatitis C virus (HCV) infection.To screen and treat HCV infection in prisoners is an important social health issue.It can be the start for HCV micro-elimination.

Research motivation

HCV treatment is not frequently administered to prisoners due to multiple factors.Therefore,we implemented an outreach strategy in combination with universal mass screen and onsite treatment in a prison..

Research obiectives

To implement an outreach strategy.HCV-infected prisoners received a simplified pan genotypic direct-acting antivirals (DAA) regimen,12 wk of sofosbuvir/ velpatasvir.The primary endpoint was sustained virological response (SVR12,defined as undetectable HCV RNA throughout 12 wk of the post-treatment follow-up period).

Research methods

All participants received blood tests.We used reflex testing.All HCV-infected prisoners received DAA therapy.Laboratory data monitoring and assessment of side effects were performed at treatment wk 2,4,8 and end-of-treatment (EOT),and 12 wk after EOT.

Research results

DAA regimen with sofosbuvir/ velpatasvir achieved high SVR12 rate.There was no virological failure,treatment discontinuation,and serious adverse event among sofosbuvir/ velpatasvir-treated patients in the HCV micro-elimination group.

Research conclusions

Well-designed strategies for mass screening and treatment for HCV-infected prisoners can be implemented successfully by the collaboration between physicians and prison authorities.

Research perspectives

Our study provided evidence for the concept that simplified,genotyping/subtypingfree regimens can achieve high SVR12 rate in HCV-infected prisoners.In the future,it is possible to implement the strategy to all prisoners in our country.