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https://www.readbyqxmd.com/read/29780135/the-real-world-efficacy-and-safety-of-ombitasvir-paritaprevir-ritonavir-for-hepatitis-c-genotype-1
#1
Akio Miyasaka, Yuich Yoshida, Toshimi Yoshida, Akihiko Murakami, Koichi Abe, Ken Ohuchi, Tadashi Kawakami, Daisuke Watanebe, Takao Hoshino, Kei Sawara, Yasuhiro Takikawa
Objective There are few reports on the outcomes of 12-week paritaprevir, ombitasvir, and ritonavir (PTV/OBV/r) treatment in real-world clinical settings. We aimed to evaluate the efficacy and safety of 12-week treatment with ritonavir-boosted paritaprevir and ombitasvir in patients with hepatitis C virus (HCV) genotype 1 infection in a real-world setting. Methods Fifty-eight patients with chronic hepatitis or compensated hepatic cirrhosis and genotype-1 HCV infection were treated with PTV/OBV/r and followed for 24 weeks after the completion of treatment in 10 centers in northern Tohoku...
May 18, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29621544/prevalence-of-ns5a-resistance-associated-variants-in-ns5a-inhibitor-treatment-failures-and-an-effective-treatment-for-ns5a-p32-deleted-hepatitis-c-virus-in-humanized-mice
#2
Yuji Teraoka, Takuro Uchida, Michio Imamura, Mitsutaka Osawa, Masataka Tsuge, Hiromi Abe-Chayama, C Nelson Hayes, Grace Naswa Makokha, Hiroshi Aikata, Daiki Miki, Hidenori Ochi, Yuji Ishida, Chise Tateno, Kazuaki Chayama
Patients with chronic hepatitis C virus (HCV) infection who have failed to respond to direct-acting antiviral (DAA) treatment often acquire drug resistance-associated variants (RAVs). The NS5A-P32 deletion (P32del) RAV confers potent resistance to NS5A inhibitors; therefore, patients who acquire this deletion are likely to fail to respond to DAA re-treatment. We investigated the prevalence of N55A-P32del in patients who failed to respond to prior NS5A inhibitor treatment using direct sequencing and analyzed the efficacy of DAA combination treatment in the presence of NS5A-P32del RAVs using human hepatocyte transplanted mice...
April 2, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29616399/techniques-of-adrenal-venous-sampling-in-patients-with-inferior-vena-cava-or-renal-vein-anomalies
#3
Kenji Endo, Satoru Morita, Shingo Suzaki, Hiroshi Yamazaki, Yu Nishina, Shuji Sakai
PURPOSE: To review the techniques and technical success rate of adrenal venous sampling (AVS) in patients with inferior vena cava (IVC) or renal vein anomalies. MATERIALS AND METHODS: The techniques and success rate of AVS in 15 patients with anomalies [8 with double IVC (dIVC), 3 with left IVC (ltIVC), 2 with retroaortic left renal vein (LRV), and 2 with circumaortic LRV] underwent AVS was retrospectively reviewed. RESULTS: Among 11 patients with IVC anomalies, the success rates for sampling the right and left adrenal veins (RAV and LAV) were 81...
April 3, 2018: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29579872/therapy-with-direct-acting-antiviral-agents-for-hepatitis-c-in-liver-transplant-recipients
#4
F Nogueras López, A López Garrido, E J Ortega Suazo, F Vadillo Calles, F Valverde López, M D Espinosa Aguilar
BACKGROUND: Recurrent infection with the hepatitis C virus (HCV) after liver transplantation (LT) is associated with decreased graft and patient survival. Direct-acting antiviral (DAA) therapies have changed the landscape of HCV due to their excellent safety profile and cure rates. Our aim was to evaluate the efficacy and tolerability of antiviral therapy in recurrent HCV after LT with DAA therapy. METHODS: Our retrospective analysis included 46 LT recipients with HCV recurrence...
March 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29459139/right-adrenal-vein-comparison-between-adaptive-statistical-iterative-reconstruction-and-model-based-iterative-reconstruction
#5
Y Noda, S Goshima, S Nagata, T Miyoshi, H Kawada, N Kawai, Y Tanahashi, M Matsuo
AIM: To compare right adrenal vein (RAV) visualisation and contrast enhancement degree on adrenal venous phase images reconstructed using adaptive statistical iterative reconstruction (ASiR) and model-based iterative reconstruction (MBIR) techniques. MATERIAL AND METHODS: This prospective study was approved by the institutional review board, and written informed consent was waived. Fifty-seven consecutive patients who underwent adrenal venous phase imaging were enrolled...
June 2018: Clinical Radiology
https://www.readbyqxmd.com/read/29435197/successful-retreatment-with-sofosbuvir-plus-ledipasvir-for-cirrhotic-patients-with-hepatitis-c-virus-genotype-1b-who-discontinued-the-prior-treatment-with-asunaprevir-plus-daclatasvir-a-case-series-and-review-of-the-literature
#6
Yuki Haga, Tatsuo Kanda, Shin Yasui, Masato Nakamura, Yoshihiko Ooka, Koji Takahashi, Shuang Wu, Shingo Nakamoto, Makoto Arai, Tetsuhiro Chiba, Hitoshi Maruyama, Osamu Yokosuka, Nobuo Takada, Mitsuhiko Moriyama, Fumio Imazeki, Naoya Kato
Background: Interferon-free treatment results in higher sustained virologic response (SVR) rates, with no serious adverse events in hepatitis C virus (HCV)-infected patients. However, in some patients with treatment-failure in HCV NS5A inhibitor-including interferon-free regimens, the treatment-emergent HCV NS5A resistance-associated variants (RAVs), which are resistant to interferon-free retreatment including HCV NS5A inhibitors, are observed. In HCV-infected Japanese patients with daclatasvir and asunaprevir treatment failure, retreatment with sofosbuvir and ledipasvir could lead to only ∼70% SVR rates...
January 12, 2018: Oncotarget
https://www.readbyqxmd.com/read/29410796/environmental-and-social-factors-impacting-on-epidemic-and-endemic-tuberculosis-a-modelling-analysis
#7
Chacha M Issarow, Nicola Mulder, Robin Wood
Tuberculosis (TB) transmission results from the interaction between infective sources and susceptible individuals within enabling socio-environmental conditions. As TB is an airborne pathogen, the transmission probability is determined by the volume of air inhaled from an infected source and the concentration of Mycobacterium tuberculosis containing respirable particles (doses) per volume of air. In this study, we model the contributions of infectious dose production, prevalence of infectious cases and daily rebreathed air volume (RAV) for defining the boundary conditions necessary to sustain endemic TB transmission at the population level...
January 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29384920/the-radiographic-parameter-risk-factors-of-rapid-curve-progression-in-lenke-5-and-6-adolescent-idiopathic-scoliosis-a-retrospective-study
#8
Zhikun Li, Gengwu Li, Chao Chen, Yifan Li, Changwei Yang, Ming Li, Wei Xu, Xiaodong Zhu
Various parameters related to growth and maturity have been shown to be risk factors for scoliosis curve progression. We previously identified correlations between curve progression and radiographic parameters in clinical practice, but there is a lack of research.The aim of this study was to investigate and identify the radiographic parameters that are risk factors for rapid curve progression in Lenke 5 or 6 adolescent idiopathic scoliosis (AIS).A retrospective review of patients who were prospectively enrolled at the initiation of brace wear and followed through completion of bracing or surgery was performed...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29363407/prophylaxis-and-treatment-of-hiv-1-infection-in-pregnancy-swedish-recommendations-2017
#9
Lars Navér, Jan Albert, Christina Carlander, Leo Flamholc, Magnus Gisslén, Olof Karlström, Veronica Svedhem-Johansson, Anders Sönnerborg, Katarina Westling, Aylin Yilmaz, Karin Pettersson
Prophylaxis and treatment with antiretroviral drugs have resulted in a very low rate of mother-to-child transmission (MTCT) of HIV during recent years. Registration of new antiretroviral drugs, modification of clinical praxis, updated general treatment guidelines and increasing knowledge about MTCT have necessitated regular revisions of the recommendations for 'Prophylaxis and treatment of HIV-1 infection in pregnancy'. The Swedish Reference Group for Antiviral Therapy (RAV) has updated the recommendations from 2013 at an expert meeting 19 September 2017...
January 24, 2018: Infectious Diseases
https://www.readbyqxmd.com/read/29362671/the-global-origins-of-resistance-associated-variants-in-the-non-structural-proteins-5a-and-5b-of-the-hepatitis-c-virus
#10
Bradley R Jones, Anita Y M Howe, P Richard Harrigan, Jeffrey B Joy
New, costly, fast acting, therapies targeting the non-structural proteins 5A and 5B (NS5A and NS5B) regions of the hepatitis C virus (HCV) genome are curative in the majority of cases. Variants with certain mutations in the NS5A and NS5B regions of HCV have been shown to reduce susceptibility to direct-acting NS5A and NS5B therapy and are found in treatment naïve patients. Despite this, the ease with which these variants evolve is poorly known, as are their evolutionary and geographic origins. To address this crucial gap we inferred the evolutionary and geographic origins of resistance-associated variants (RAVs) in the HCV NS5A and NS5B regions of subtypes 1a, 1b, and 3a sequences available from global databases...
January 2018: Virus Evolution
https://www.readbyqxmd.com/read/29346834/twelve-week-ravidasvir-plus-ritonavir-boosted-danoprevir-and-ribavirin-for-non-cirrhotic-hcv-genotype-1-patients-a-phase-2-study
#11
Jia-Horng Kao, Min-Lung Yu, Chi-Yi Chen, Cheng-Yuan Peng, Ming-Yao Chen, Huoling Tang, Qiaoqiao Chen, Jinzi J Wu
BACKGROUND AND AIM: The need for all-oral hepatitis C virus (HCV) treatments with higher response rates, improved tolerability, and lower pill burden compared with interferon-inclusive regimen has led to the development of new direct-acting antiviral agents. Ravidasvir (RDV) is a second-generation, pan-genotypic NS5A inhibitor with high barrier to resistance. The aim of this phase 2 study (EVEREST study) was to assess the efficacy and safety of interferon-free, 12-week RDV plus ritonavir-boosted danoprevir (DNVr) and ribavirin (RBV) regimen for treatment-naïve Asian HCV genotype 1 (GT1) patients without cirrhosis...
January 18, 2018: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29337848/transmission-networks-of-hcv-genotype-1a-enriched-with-pre-existing-polymorphism-q80k-among-hiv-infected-patients-with-acute-hepatitis-c-in-poland
#12
Miłosz Parczewski, Iwona Cielniak, Justyna Kordek, Bogusz Aksak-Wąs, Anna Urbańska, Magdalena Leszczyszyn-Pynka, Ewa Siwak, Monika Bociąga-Jasik, Anna Nowak, Aleksandra Szymczak, Małgorzata Zalewska, Władysław Łojewski, Anne-Mieke Vandamme, Nadine Lübke, Lize Cuypers
BACKGROUND: Hepatitis C virus (HCV) resistance-associated variants (RAVs) have been shown to adversely affect treatment response of direct-acting antivirals. Identifying pre-existing RAVs and transmission networks among HIV/HCV genotype 1 (G1)-infected patients from Poland will assist in shaping surveillance strategies for HCV. METHODS: NS3 and NS5A sequences were obtained from samples of 112 direct-acting antiviral-naive G1 patients (45 G1a and 67 G1b), of which 74 were chronically infected and 38 were diagnosed with acute hepatitis C (AHC)...
April 15, 2018: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29337135/defining-bedaquiline-susceptibility-resistance-cross-resistance-and-associated-genetic-determinants-a-retrospective-cohort-study
#13
Nazir A Ismail, Shaheed V Omar, Lavania Joseph, Netricia Govender, Linsay Blows, Farzana Ismail, Hendrik Koornhof, Andries W Dreyer, Koné Kaniga, Norbert Ndjeka
BACKGROUND: Bedaquiline (BDQ) is a novel agent approved for use in combination treatment of multi-drug resistant tuberculosis (MDR-TB). We sought to determine BDQ epidemiological cut-off values (ECVs), define and assess interpretive criteria against putative resistance associated variants (RAVs), microbiological outcomes and cross resistance with clofazimine (CFZ). METHODS: A retrospective cohort study was conducted. Minimal inhibitory concentrations (MIC) to BDQ were determined using 7H9 broth microdilution (BMD) and MGIT960...
February 2018: EBioMedicine
https://www.readbyqxmd.com/read/29279155/image-quality-and-radiation-dose-of-low-tube-voltage-ct-with-reduced-contrast-media-for-right-adrenal-vein-imaging
#14
Yuki Takahashi, Hideki Ota, Kensuke Omura, Yutaka Dendo, Katharina Otani, Tomonori Matsuura, Masahiro Kitami, Kazumasa Seiji, Yuta Tezuka, Masahiro Nezu, Yoshikiyo Ono, Ryo Morimoto, Fumitoshi Satoh, Kei Takase
OBJECTIVES: To compare image quality and radiation dose of right adrenal vein (RAV) imaging computed tomography (CT) among conventional, low kV, and low kV with reduced contrast medium protocols. METHODS: One-hundred-and-twenty patients undergoing adrenal CT were randomly assigned to one of three protocols: contrast dose of 600mgI/kg at 120-kV tube voltage setting (600-120 group), 600mgI/kg at 80kV (600-80 group), and 360mgI/kg at 80kV (360-80 group). Iterative reconstruction was used for 80-kV groups...
January 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29164151/naturally-occurring-resistance-associated-variants-to-hepatitis-c-virus-direct-acting-antiviral-agents-in-treatment-naive-hcv-genotype-6a-infected-patients
#15
Zhanyi Li, Ying Liu, Ying Zhang, Xiaoqiong Shao, Qiumin Luo, Xiaoyan Guo, Guoli Lin, Qingxian Cai, Zhixin Zhao, Yutian Chong
Background and Objective: The direct-acting antiviral agents (DAAs) antiviral therapy has drastically improved the prognosis of hepatitis C virus (HCV) patients. However, the viral drug resistance-associated variants (RAVs) can limit the efficacy of DAAs. For the HCV-6a is not the predominant prevalent genotype; the data on the prevalence of naturally occurring RAVs in it is scarce. Our study aims to assess the prevalence of RAVs in treatment-naive HCV-6a patients. Methods: Nested PCR assays were performed on 95 HCV-6a patients to amplify HCV viral regions of NS3, NS5A, and NS5B...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29151275/rav-transcription-factors-are-essential-for-disease-resistance-against-cassava-bacterial-blight-via-activation-of-melatonin-biosynthesis-genes
#16
Yunxie Wei, Yanli Chang, Hongqiu Zeng, Guoyin Liu, Chaozu He, Haitao Shi
With 1 AP2 domain and 1 B3 domain, 7 MeRAVs in apetala2/ethylene response factor (AP2/ERF) gene family have been identified in cassava. However, the in vivo roles of these remain unknown. Gene expression assays showed that the transcripts of MeRAVs were commonly regulated after Xanthomonas axonopodis pv manihotis (Xam) and MeRAVs were specifically located in plant cell nuclei. Through virus-induced gene silencing (VIGS) in cassava, we found that MeRAV1 and MeRAV2 are essential for plant disease resistance against cassava bacterial blight, as shown by the bacterial propagation of Xam in plant leaves...
January 2018: Journal of Pineal Research
https://www.readbyqxmd.com/read/29143142/prevalence-of-ns5b-resistance-associated-variants-in-treatment-na%C3%A3-ve-asian-patients-with-chronic-hepatitis-c
#17
Song Yang, Huichun Xing, Shenghu Feng, Wei Ju, Shunai Liu, Xiaomei Wang, Weini Ou, Jun Cheng, Calvin Q Pan
There is little information on the association between baseline non-structural protein (NS) 5b resistance-associated variants (RAVs) and treatment failure in hepatitis C patients. This study examined the frequencies of natural hepatitis C virus (HCV) NS5B resistance-associated variants (RAVs) in an Asian cohort. Samples from Asian HCV patients enrolled between October 2009 and September 2014 were analyzed for NS5B RAVs within the region from amino acid 230 to 371. Serum samples were tested by PCR genotyping, with sequence alignment performed using the neighbor-joining method...
February 2018: Archives of Virology
https://www.readbyqxmd.com/read/29103467/visualization-of-right-adrenal-vein-comparison-with-three-phase-dynamic-contrast-enhanced-ct
#18
Yoshifumi Noda, Satoshi Goshima, Shoma Nagata, Hiroshi Kawada, Nobuyuki Kawai, Hiromi Koyasu, Masayuki Matsuo
PURPOSE: To evaluate the visualization of the right adrenal vein (RAV) on dynamic contrast-enhanced computed tomography (CT) images in patients with primary aldosteronism. MATERIALS AND METHODS: We evaluated 27 consecutive patients with primary aldosteronism who underwent contrast-enhanced dynamic CT and subsequent adrenal venous sampling. Scan delays were 10-, 20- and 60-s after a bolus-tracking program detected that the threshold of a 100 Hounsfield units (HU) increase in the abdominal aorta had been achieved...
November 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/29082495/high-content-positional-biosensor-assay-to-screen-for-compounds-that-prevent-or-disrupt-androgen-receptor-and-transcription-intermediary-factor-2-protein-protein-interactions
#19
Yun Hua, Daniel P Camarco, Christopher J Strock, Paul A Johnston
Transcriptional Intermediary Factor 2 (TIF2) is a key Androgen receptor (AR) coactivator that has been implicated in the development and progression of castration resistant prostate cancer (CRPC). This chapter describes the implementation of an AR-TIF2 protein-protein interaction (PPI) biosensor assay to screen for small molecules that can induce AR-TIF2 PPIs, inhibit the DHT-induced formation of AR-TIF2 PPIs, or disrupt pre-existing AR-TIF2 PPIs. The biosensor assay employs high content imaging and analysis to quantify AR-TIF2 PPIs and integrates physiologically relevant cell-based assays with the specificity of binding assays by incorporating structural information from AR and TIF2 functional domains along with intracellular targeting sequences using fluorescent protein reporters...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29080280/usefulness-of-semiquantitative-pcr-invader-assay-for-selecting-candidates-for-daclatasvir-plus-asunaprevir-combination-therapy-among-patients-with-hepatitis-c-virus-genotype-1b
#20
Koichi Honda, Masataka Seike, Junya Oribe, Mizuki Endo, Mie Arakawa, Masanori Tokoro, Masao Iwao, Tetsu Mori, Junko Nishimura, Yukou Takahashi, Kaoru Omori, Tsutomu Yamashita, Toyokichi Muro, Kazunari Murakami
AIMS: PCR-Invader is a highly sensitive assay for detecting non-structural protein 5A (NS5A) resistance-associated variants (RAVs) of hepatitis C virus (HCV). Here, we validated the accuracy of the semiquantitative PCR-Invader (SQ-PI) assay compared to direct sequencing (DS) for identifying NS5A RAVs, and we evaluated the treatment efficacy of daclatasvir plus asunaprevir (DCV + ASV) for patients judged to be non-positive for NS5A RAVs by SQ-PI. METHODS: Detection rates of NS5A RAVs by SQ-PI and DS were compared for 204 patients with HCV genotype 1b...
October 28, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
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