Publications by authors named "Masatsugu Ohara"

Aim: Atezolizumab/bevacizumab is a first-line therapy for unresectable hepatocellular carcinoma (HCC). Among several adverse events, grade ≥2 proteinuria is considered a significant adverse event that may cause bevacizumab interruption. Studies have shown that proteinuria might predict improved prognosis, although data are scarce and the association remains controversial, and the mechanisms and predictive factors remain unclear.

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Background And Aims: The prognostic impact of previous-HBV-infection (pHBV) in non-HBV-related hepatocellular carcinoma (non-HBV-related-HCC) and the prevalence, characteristics and significance of recently developed high-sensitivity HBs antigen positivity (hHBsAg+) in these patients remain unclear. We aimed to close these gaps.

Methods: We retrospectively screened patients with newly diagnosed non-HBV-related-HCC (standard HBsAg-test negative) at Hokkaido University.

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Background: While guidelines recommend immune checkpoint inhibitor (ICI) rechallenge as second-line therapy for unresectable hepatocellular carcinoma (HCC), data supporting this remain limited, particularly regarding a standard regimen for first- and second-line treatments. Tremelimumab/durvalumab was recently approved but data on ICI rechallenge are lacking.

Objectives: The purpose of this study was to evaluate the early efficacy and safety of tremelimumab/durvalumab for HCC as an ICI rechallenge following initial ICI therapy with atezolizumab/bevacizumab.

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Background: Endoscopic retrograde cholangiography (ERC)-related procedures, usually performed before biliary tract cancer (BTC) surgery, are associated with increased risk for various complications, which can cause sarcopenia. No study has previously elucidated the relationship between preoperative ERC-related procedures and sarcopenia/skeletal muscle mass loss.

Methods: Patients with BTC who underwent radical surgical resection following ERC-related procedures were included.

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Article Synopsis
  • - The study focused on the impact of muscle atrophy and high subcutaneous adipose tissue (SAT) radiodensity on prognosis in patients with hepatocellular carcinoma (HCC).
  • - In a retrospective analysis of 201 patients, it was found that those with muscle atrophy (33.3%) and high SAT radiodensity (12.9%) had significantly worse survival outcomes compared to those without these conditions.
  • - The findings suggest that recognizing patients with both muscle atrophy and high SAT radiodensity is crucial for developing targeted interventions, like nutritional therapy and exercise, to improve their health outcomes.
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  • Lenvatinib, a treatment for unresectable hepatocellular carcinoma (HCC), can lead to appetite loss, but the reasons and effects were previously unclear.
  • The study examined how changes in the hormone FGF21 during treatment relate to appetite changes in 63 HCC patients, measuring FGF21 levels at different times after starting lenvatinib.
  • Findings revealed that patients who experienced significant appetite loss had a notable increase in FGF21 levels after 4 weeks of treatment, suggesting that monitoring FGF21 could help predict which patients are at higher risk for appetite loss and better understand the treatment’s side effects.
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  • The study investigates the recent prevalence of hepatitis delta virus (HDV) infections among patients with hepatitis B virus (HBV) in Japan, as it has not been updated for over two decades.
  • Researchers screened 1,264 HBV patients at Hokkaido University Hospital, concluding that 1.7% had detectable anti-HDV antibodies.
  • The findings indicate that those with anti-HDV antibodies had a higher prevalence of liver cirrhosis and experienced faster progression of liver fibrosis, emphasizing the need for routine HDV testing in similar patients.
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  • Atezolizumab plus bevacizumab shows effectiveness in treating unresectable hepatocellular carcinoma (HCC), but about 20% of patients may experience progressive disease (PD) shortly after starting treatment, highlighting the need for early detection methods.
  • In a study, patients' serum was analyzed to identify biomarkers related to early PD; results indicated a significant difference in the cytokine CXCL9 levels between patients who developed early PD and those who did not.
  • Lower serum CXCL9 levels (<333 pg/mL) were found to be predictive of early PD, with patients with these lower levels experiencing shorter progression-free survival compared to those without early PD.
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Background: Acute kidney injury (AKI) is associated with liver cirrhosis (LC), water retention, diuretics to treat water retention, and a poor prognosis. Urinary neutrophil gelatinase-associated lipocalin (uNGAL) reportedly predicts a poor prognosis in decompensated LC. This study investigated the usefulness of uNGAL in predicting the short- and long-term effects of tolvaptan (TVP) and the incidence of AKI post-TVP administration.

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Aim: Hepatitis C virus (HCV) infection has been reported to cause liver steatosis. Thus, eradicating HCV with direct-acting antivirals (DAAs) is expected to reduce liver steatosis. We aimed to clarify long-term changes in the prevalence of fatty liver and hyper-low-density lipoprotein (LDL) cholesterolemia and their associations in patients who achieve successful HCV eradication using DAAs.

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The possible mechanisms of resistance to atezolizumab/bevacizumab for unresectable HCC, and the subsequent response to these therapies, remain underexplored. The sequential changes in serum growth factors, including VEGF-A, VEGF-C, VEGF-D, ANG-2, FGF-19, HGF, and EGF during atezolizumab/bevacizumab for unresectable HCC were evaluated in 46 patients. Patients who experienced PD after CR, PR, or SD to atezolizumab/bevacizumab were evaluated.

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Progressive liver fibrosis after anti-HCV treatment is a risk factor for HCC. Angiopoietin-2 (Ang2) is associated with non-regression of liver fibrosis after direct-acting antiviral (DAA). This study evaluated the predictive value of serum Ang2 levels for HCC occurrence or recurrence after DAA administration.

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No prospective study on the efficacy of tenofovir alafenamide (TAF), a novel tenofovir prodrug, in preventing hepatitis B virus (HBV) reactivation has yet been reported. This multicenter prospective study enrolled HBV-carriers who received TAF to prevent HBV reactivation before antitumor or immunosuppressive therapy, and patients with resolved HBV infection who experienced HBV-reactivation and received TAF to prevent HBV reactivation-related hepatitis. The efficacy of prophylactic TAF in preventing HBV reactivation and HBV reactivation-related hepatitis was evaluated at 6 and 12 months after initiating TAF.

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Glycosaminoglycans (GAGs), which are one of the major components of proteoglycans, play a pivotal role in physiological processes such as signal transduction, cell adhesion, growth, and differentiation. Characterization of GAGs is challenging due to the tremendous structural diversity of heteropolysaccharides with numerous sulfate or carboxyl groups. In this present study, we examined the analysis of 2-aminobenzamide (2-AB) labeled GAG disaccharides by high-performance liquid chromatography (HPLC) using a reverse-phase (RP)-column with adamantyl groups.

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De novo hepatitis B virus (HBV) reactivation occurs during direct-acting antiviral (DAA) treatment in hepatitis C virus (HCV)-infected patients with resolved HBV infection. We evaluated the predictive factors, mechanical insight, and differences of cytokine levels during anti-cancer/immunosuppressive and DAA. Eleven, 35, and 19 HCV-infected patients with previous HBV infection with HBV reactivation during DAA treatment, previous HBV infection without HBV reactivation during DAA treatment, and without HBV infection resolution receiving DAA treatment, respectively, were enrolled.

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Background: The Mac-2 binding protein glycosylation isomer (M2BPGi), a fibrosis marker in various liver diseases, is reportedly a prognostic marker in patients with hepatocellular carcinoma (HCC) who underwent hepatectomy.

Aim: To evaluate whether the M2BPGi value, M2BP, and pre-sarcopenia before radiofrequency ablation (RFA) could be useful recurrence and prognostic markers in patients with early-stage HCC.

Methods: In total, 160 patients with early-stage primary HCC treated with RFA were separately analyzed as hepatitis C virus (HCV)-positive and HCV-negative.

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Article Synopsis
  • The IMbrave150 trial showed that the combination of atezolizumab and bevacizumab is effective and safe for treating unresectable hepatocellular carcinoma (HCC).
  • In a study with 115 patients, 72 did not meet the original trial's eligibility criteria due to factors like prior therapy or lower platelet counts.
  • The results indicated that the treatment's effectiveness was similar for both eligible and ineligible patients, but those who did not meet the criteria showed worse liver function at baseline and after 12 weeks, highlighting the need for careful monitoring.
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Covert hepatic encephalopathy (CHE) impairs patient quality of life and occurs in approximately 30% of liver cirrhosis (LC) cases. Japanese clinical practice guidelines recommend rifaximin to treat overt HE (OHE). However, the usefulness of rifaximin against CHE is not thoroughly investigated in Japanese patients.

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Background: Determining the number of chronic hepatitis B (HBV) and C virus (HCV) infections is essential to assess the progress towards the World Health Organization 2030 viral hepatitis elimination goals. Using data from the Japanese National Database (NDB), we calculated the number of chronic HBV and HCV infections in 2015 and predicted the trend until 2035.

Methods: NDB and first-time blood donors data were used to calculate the number of chronic HBV and HCV infections in 2015.

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Aim: A high prevalence of overestimated renal function in patients with liver cirrhosis (LC) has been reported; nonetheless, its impact on prognosis remains unclear. We aimed to evaluate the impact of overestimated renal function on prognosis in patients with LC.

Methods: An overestimated renal function was defined as a >20% increase in the creatinine-based estimated glomerular filtration rate (eGFR), compared with cystatin C-based eGFR.

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Background & Aims: Benefits of nucleos(t)ide analogs (NAs) on hepatitis B surface antigen (HBsAg) reduction and interferon-lambda3 (IFN-λ3) induction are still not known. This study aimed to investigate the effects of NAs on HBsAg reduction and association with serum IFN-λ3 levels in chronic hepatitis B (CHB) patients.

Methods: A total of 91 patients [51 treated with nucleoside analog entecavir hydrate (ETV) and 40 treated with nucleotide analog adefovir dipivoxil (ADV) or tenofovir disoproxil fumarate (TDF)] with clinically evident CHB (chronic hepatitis, 57; liver cirrhosis, 34) were enrolled in this study.

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Article Synopsis
  • Switching from tenofovir-disoproxil-fumarate (TDF) to tenofovir-alafenamide (TAF) in patients with hepatitis B may help prevent kidney issues and bone loss, but its impact on blood lipids is unclear.
  • * A study analyzed blood samples from 69 patients before and after the switch to assess changes in cholesterol levels, revealing significant increases in total cholesterol and oxidized LDL after transitioning to TAF.
  • * The rate of dyslipidemia also rose after the switch, highlighting the need for close lipid monitoring post-TAF treatment due to potential risks for atherosclerosis.*
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Serum growth factor changes and their effect on prognosis during lenvatinib for unresectable hepatocellular carcinoma (HCC) remain underexplored. The sequential changes in serum growth factors during lenvatinib for unresectable HCC were evaluated in 58 patients using complete clinical data, and preserved serum was used to investigate changes in FGF-19, ANG-2, HGF, VEGF, and EGF. Patients with a complete response (CR), partial response (PR), and stable disease (SD) were evaluated for growth factor changes between the best response and progressive disease (PD) points, classified based on these changes, and evaluated by post progression survival (PPS).

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Chronic viral hepatitis is one of the most widespread infectious diseases in Japan. In the 2009 financial year, the Japanese government enacted the Basic Act on Hepatitis Measures, followed by the Basic Guidelines for Promotion of Control Measures for Hepatitis 2 years later. The guidelines emphasize the importance of provision and dissemination of accurate information on viral hepatitis and public awareness-raising.

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