Namiki Izumi

Namiki Izumi


Research Focus & Metrics

Academic Career Length

28Years (1999-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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31 July 2019 in Cancers
Verified
Journal Article
Open access
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Masatoshi KudoMasatoshi Kudo
Masatoshi Kudo
KUKazuomi Ueshima
Kazuomi Ueshima
SCStephen L. Chan
Stephen L. Chan
TMTomohiro Minami
Tomohiro Minami
HCHirokazu Chishina
Hirokazu Chishina
Naoshi NishidaNaoshi Nishida
Naoshi Nishida
Although transcatheter arterial chemoembolization (TACE) is the standard of care for intermediate-stage hepatocellular carcinoma (HCC), this is a largely heterogeneous disease that includes a subgroup of patients who do not benefit from TACE. The treatment strategy for this subgroup of patients currently remains an unmet need in clinical practice. Here, we performed a proof-of-concept study that lenvatinib may be a more favorable treatment option over TACE as an initial treatment in intermediate-stage HCC patients with large or multinodular tumours exceeding the up-to-seven criteria. This proof-of-concept study included 642 consecutive patients with HCC initially treated with lenvatinib or conventional TACE (cTACE) between January 2006 and December 2018. Of these patients, 176 who received lenvatinib or cTACE as an initial treatment and met the eligibility criteria (unresectable, beyond the up-to-seven criteria, no prior TACE/systemic therapy, no vascular invasion, no extrahepatic spread and Child–Pugh A liver function) were selected for the study. Propensity score matching was used to adjust for patient demographics. After propensity-score matching, the outcome of 30 patients prospectively treated with lenvatinib (14 in clinical trials, one in an early access program and 15 in real world settings) and 60 patients treated with cTACE as the initial treatment was compared. The change of albumin-bilirubin (ALBI) score from baseline to the end of treatment were −2.61 to −2.61 for 30 patients in the lenvatinib group (p = 0.254) and −2.66 to −2.09 in the cTACE group (p < 0.01), respectively. The lenvatinib group showed a significantly higher objective response rate (73.3% vs. 33.3%; p < 0.001) and significantly longer median progression-free survival than the cTACE group (16.0 vs. 3.0 months; p < 0.001). Overall survival was significantly longer in the lenvatinib group than in the cTACE group (37.9 vs. 21.3 months; hazard ratio: 0.48, p < 0.01). In patients with large or multinodular intermediate-stage HCC exceeding the up-to-seven criteria with Child–Pugh A liver function, who usually do not benefit from TACE, lenvatinib provides a more favorable outcome than TACE.

13 May 2011 in Hepatology
Verified
Journal Article
Open access
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HYHaruhiko Yoshida
Haruhiko Yoshida
YSYasushi Shiratori
Yasushi Shiratori
Masatoshi KudoMasatoshi Kudo
Masatoshi Kudo
SSShuichiro Shiina
Shuichiro Shiina
TMToshihiko Mizuta
Toshihiko Mizuta
MOMasao Omata
Masao Omata
Hepatocellular carcinoma (HCC) is characterized by frequent recurrence, even after curative treatment. Vitamin K2, which has been reported to reduce HCC development, may be effective in preventing HCC recurrence. Patients who underwent curative ablation or resection of HCC were randomly assigned to receive placebo, 45 mg/day, or 90 mg/day vitamin K2 in double-blind fashion. HCC recurrence was surveyed every 12 weeks with dynamic computed tomography/magnetic resonance imaging, with HCC-specific tumor markers monitored every 4 weeks. The primary aim was to confirm the superiority of active drug to placebo concerning disease-free survival (DFS), and the secondary aim was to evaluate dose-response relationship. Disease occurrence and death from any cause were treated as events. Hazard ratios (HRs) for disease occurrence and death were calculated using a Cox proportional hazards model. Enrollment was commenced in March 2004. DFS was assessed in 548 patients, including 181 in the placebo group, 182 in the 45-mg/day group, and 185 in the 90-mg/day group. Disease occurrence or death was diagnosed in 58, 52, and 76 patients in the respective groups. The second interim analysis indicated that vitamin K2 did not prevent disease occurrence or death, with an HR of 1.150 (95% confidence interval: 0.843-1.570, one-sided; P = 0.811) between the placebo and combined active-drug groups, and the study was discontinued in March 2007. Conclusion: Efficacy of vitamin K2 in suppressing HCC recurrence was not confirmed in this double-blind, randomized, placebo-controlled study. (Hepatology 2011;)

21 April 2018 in Hepatology Research
Verified
Journal Article
Closed access
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NTNobuharu Tamaki
Nobuharu Tamaki
YKYohei Koizumi
Yohei Koizumi
MHMasashi Hirooka
Masashi Hirooka
NYNorihisa Yada
Norihisa Yada
HTHitomi Takada
Hitomi Takada
NINamiki Izumi
Namiki Izumi

18 June 2018 in PLOS ONE
Verified
Journal Article
Open access
PDF file
HTHitomi Takada
Hitomi Takada
MKMasayuki Kurosaki
Masayuki Kurosaki
HNHiroyuki Nakanishi
Hiroyuki Nakanishi
YTYuka Takahashi
Yuka Takahashi
JIJun Itakura
Jun Itakura
NINamiki Izumi
Namiki Izumi
The present study aimed to investigate the impact of pre-sarcopenia on the prognosis of patients with advanced hepatocellular carcinoma (HCC) treated with sorafenib. We enrolled 214 patients (71 ± 10 years old; 166 men and 48 women; 90% Child–Pugh grade A and 10% Child–Pugh grade B) treated with sorafenib in our hospital from July 2009 to August 2016. The muscle volume was measured from CT images just before sorafenib administration using software (SliceOmatic). Skeletal muscle mass index was calculated, and the presence of pre-sarcopenia was judged according to the standard (42 cm2/m2 for men and 38 cm2/m2 for women) proposed by the Japan Society of Hepatology. Pre-sarcopenia was found in 123 patients (57%). The overall survival (OS) in patients with pre-sarcopenia tended to be worse than in patients without pre-sarcopenia (median 252 vs. 284 days, respectively; p = 0.16). Multivariate Cox hazard analysis revealed a baseline serum albumin level of ≤3.5 g/dl [hazard ratio (HR) 1.9; p = 0.0006], a baseline alpha-fetoprotein(AFP) level of ≥100 ng/ml (HR 2.1; p = 0.002), presence of lesions in bilateral hepatic lobes (HR 1.7; p = 0.03), and presence of major portal vein invasion (HR 1.8; p = 0.01) to be independent prognostic factors. In the 68 patients who had three or more negative prognostic factors, the presence of pre-sarcopenia did not correlate with prognosis. Of the 146 patients who had two or less prognostic factors, OS was significantly worse in 84 patients (58%) with pre-sarcopenia than in 62 patients without pre-sarcopenia (median 417 vs. 562 days, respectively; p = 0.047), and Cox hazard analysis revealed pre-sarcopenia to be an important prognostic factor (HR 1.6; p = 0.047). In sorafenib treatment for advanced HCC, pre-sarcopenia is a significant prognostic factor in patients with two or less negative prognostic factors, and could be the target of intervention to improve prognosis.

9 August 2023 in American Journal of Gastroenterology
Verified
Journal Article
Open access
HCHenry L.Y. Chan
Henry L.Y. Chan
MBMaria Buti
Maria Buti
YLYoung-Suk Lim
Young-Suk Lim
KAKosh Agarwal
Kosh Agarwal
PMPatrick Marcellin
Patrick Marcellin
OIon behalf of the GS-US-320-0110 and GS-US-320-0108 investigators
on behalf of the GS-US-320-0110 and GS-US-320-0108 investigators
INTRODUCTION: The results from 2 phase 3 studies, through 2 years, in chronic hepatitis B infection showed tenofovir alafenamide (TAF) had similar efficacy to tenofovir disoproxil fumarate (TDF) with superior renal and bone safety. We report updated results through 5 years. METHODS: Patients with HBeAg-negative or HBeAg-positive chronic hepatitis B infection with or without compensated cirrhosis were randomized (2:1) to TAF 25 mg or TDF 300 mg once daily in double-blind (DB) fashion for up to 3 years, followed by open-label (OL) TAF up to 8 years. Efficacy (antiviral, biochemical, and serologic), resistance (deep sequencing of polymerase/reverse transcriptase and phenotyping), and safety, including renal and bone parameters, were evaluated by pooled analyses. RESULTS: Of 1,298 randomized and treated patients, 866 receiving TAF (DB and OL) and 432 receiving TDF with rollover to OL TAF at year 2 (n = 180; TDF→TAF3y) or year 3 (n = 202; TDF→TAF2y) were included. Fifty (4%) TDF patients who discontinued during DB were excluded. At year 5, 85%, 83%, and 90% achieved HBV DNA <29 IU/mL (missing = failure) in the TAF, TDF→TAF3y, and TDF→TAF2y groups, respectively; no patient developed TAF or TDF resistance. Median estimated glomerular filtration rate (by using Cockcroft-Gault) declined <2.5 mL/min, and mean declines of <1% in hip and spine bone mineral density were seen at year 5 in the TAF group; patients in the TDF→TAF groups had improvements in these parameters at year 5 after switching to OL TAF. DISCUSSION: Long-term TAF treatment resulted in high rates of viral suppression, no resistance, and favorable renal and bone safety.

1 August 2015 in Clinical Gastroenterology and Hepatology
Verified
Journal Article
Closed access
HNHiroyuki Nakanishi
Hiroyuki Nakanishi
MKMasayuki Kurosaki
Masayuki Kurosaki
KTKaoru Tsuchiya
Kaoru Tsuchiya
NNNatsuko Nakakuki
Natsuko Nakakuki
HTHitomi Takada
Hitomi Takada
NINamiki Izumi
Namiki Izumi