Koji Sawada

Dr. Koji Sawada

orcid

Research Focus & Metrics

Academic Career Length

33Years (1994-Present)

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

Representative Publications

View All Publications
21 November 2019 in Journal of Gastroenterology and Hepatology
Verified
Journal Article
Closed access
PDF file
KSKoji Sawada
Koji Sawada
HHHidemi Hayashi
Hidemi Hayashi
SNShunsuke Nakajima
Shunsuke Nakajima
THTakumu Hasebe
Takumu Hasebe
MFMikihiro Fujiya
Mikihiro Fujiya
TOToshikatsu Okumura
Toshikatsu Okumura

22 April 2023 in Nutrients
Verified
Journal Article
Open access
PDF file
Hirokazu TakahashiHirokazu Takahashi
Hirokazu Takahashi
MKMiwa Kawanaka
Miwa Kawanaka
HFHideki Fujii
Hideki Fujii
MIMichihiro Iwaki
Michihiro Iwaki
HHHideki Hayashi
Hideki Hayashi
J(Japan Study Group of Nonalcoholic Fatty Liver Disease (JSG-NAFLD)
Japan Study Group of Nonalcoholic Fatty Liver Disease (JSG-NAFLD)
The relationship between baseline serum albumin level and long-term prognosis of patients with nonalcoholic fatty liver disease (NAFLD) remains unknown. This is a sub-analysis of the CLIONE (Clinical Outcome Nonalcoholic Fatty Liver Disease) study. The main outcomes were: death or orthotopic liver transplantation (OLT), liver-related death, and liver-related events (hepatocellular carcinoma [HCC], decompensated cirrhosis, and gastroesophageal varices/bleeding). 1383 Japanese patients with biopsy-confirmed NAFLD were analyzed. They were divided into 3 groups based on serum albumin: high (>4.0 g/dL), intermediate (3.5–4.0 g/dL), and low (<3.5 g/dL). Unadjusted hazard ratio [HR] of the intermediate albumin group, compared with the high albumin group, were 3.6 for death or OLT, 11.2 for liver-related death, 4.6 for HCC, 8.2 for decompensated cirrhosis, and 6.2 for gastroesophageal varices (all risks were statistically significant). After adjusting confounding factors, albumin remained significantly associated with death or OLT (intermediate vs. high albumin group: HR 3.06, 95% confidence interval [CI] 1.59–5.91, p < 0.001; low vs. high albumin group: HR 22.9, 95% CI 8.21–63.9, p < 0.001). Among biopsy-confirmed NAFLD patients, those with intermediate or low serum albumin had a significantly higher risk of death or OLT than those with high serum albumin.

15 June 2019 in Internal Medicine
Verified
Journal Article
Open access
PDF file
KSKoji Sawada
Koji Sawada
TSTatsuya Shonaka
Tatsuya Shonaka
YNYuji Nishikawa
Yuji Nishikawa
KHKimiharu Hasegawa
Kimiharu Hasegawa
HHHidemi Hayashi
Hidemi Hayashi
TOToshikatsu Okumura
Toshikatsu Okumura
The patient was a 76-year-old man who was treated with nivolumab due to recurrent gastric cancer. A blood examination revealed grade 3 alkaline phosphatase (ALP) elevation. A histopathological examination revealed marked portal infiltration, including eosinophils and CD4+ and CD8+ T lymphocytes, suggesting nivolumab-related cholangitis accompanied by the features of both an immune-related adverse event (irAE) and drug-induced liver injury (DILI) with allergic reaction. The patient's ALP level immediately decreased after the administration of prednisolone. Although nivolumab-related cholangitis, a rare irAE, has been reported to be refractory to steroid therapy, patients with features of irAE and allergic DILI might immediately respond to prednisolone.

11 May 2017 in Journal of Gastroenterology and Hepatology
Verified
Journal Article
Open access
PDF file
SNShunsuke Nakajima
Shunsuke Nakajima
HTHiroki Tanaka
Hiroki Tanaka
KSKoji Sawada
Koji Sawada
HHHidemi Hayashi
Hidemi Hayashi
THTakumu Hasebe
Takumu Hasebe
TOToshikatsu Okumura
Toshikatsu Okumura
Background and Aim: Some single‐nucleotide polymorphisms (SNPs) are associated with the development of non‐alcoholic fatty liver disease (NAFLD). As one of the genetic factors, PNPLA3 rs738409 (I148M) is important to associate with pathogenesis of NAFLD. Because other SNPs remain unclear in Japan, we performed a high‐throughput sequencing that targeted more than 1000 genes to identify a novel genetic variant in Japanese patients with NAFLD.Methods: The present study in 36 NAFLD patients and 27 healthy volunteers was performed. A high‐throughput sequencer was used to detect the gene variations. Candidate genes were validated by TaqMan SNP genotyping assay in 53 NAFLD patients and 41 healthy volunteers. To investigate the function of candidate gene, we performed biochemical analyses in cultured hepatocytes and liver tissues.Results: EXO1 rs1047840, PTPRD rs35929428, IFNAR2 rs2229207, CPOX rs1131857, IL23R rs1884444, IL10RA rs2228055, and FAM3B rs111988437 were identified as candidate genetic variants, and PTPRD rs35929428 was only extracted as a SNP predicting to cause protein dysfunction. In validation analysis, PTPRD rs35929428 associated with the development of NAFLD (P = 0.015, odds ratio = 5.00, 95% confidence interval: 1.33–18.70). In addition, PTPRD rs35929428 was associated with Fib‐4 index and with hepatic fat droplets. Biochemical analyses indicated that PTPRD rs35929428 promoted dephosphorylation of tyrosine 705 signal transducer and activator of transcription 3 (Tyr 705) in hepatocytes.Conclusion: PTPRD rs35929428 was a novel SNP in patients with NAFLD. Through exacerbation of the dephosphorylation of signal transducer and activator of transcription 3 (Tyr 705) in hepatocytes, PTPRD rs35929428 might play a role in hepatic lipid accumulation and fibrosis, followed by the development of NAFLD.

25 April 2024 in Hepatology Research
Verified
Journal Article
Closed access
Kazuhiro NousoKazuhiro Nouso
Kazuhiro Nouso
MKMiwa Kawanaka
Miwa Kawanaka
HFHideki Fujii
Hideki Fujii
KKKazuya Kariyama
Kazuya Kariyama
HTHidenori Toyoda
Hidenori Toyoda
J(Japan Study Group of Nonalcoholic Fatty Liver Disease (JSG‐NAFLD)
Japan Study Group of Nonalcoholic Fatty Liver Disease (JSG‐NAFLD)

14 January 2016 in Therapeutic Apheresis and Dialysis
Verified
Journal Article
Open access
PDF file
KSKoji Sawada
Koji Sawada
MOMaiko Ohdo
Maiko Ohdo
TITomoko Ino
Tomoko Ino
TNTakashi Nakamura
Takashi Nakamura
TNToyoko Numata
Toyoko Numata
THToshifumi Hibi
Toshifumi Hibi
Nafamostat mesilate is the first anticoagulant of choice for leukocytapheresis (LCAP) with a Cellsorba E column for treating ulcerative colitis (UC). However, because of complications, mainly due to allergy to nafamostat mesilate, heparin may be used as a substitute. To evaluate the safety and tolerability of nafamostat mesilate and heparin as anticoagulants in LCAP for UC, we conducted post hoc analysis of data from a large‐scale, prospective, observational study of LCAP, which was conducted at 116 medical facilities in Japan between May 2010 and December 2012. Of 832 patients included in this analysis, nafamostat mesilate and heparin were used in 676 (81.3%) and 113 (13.6%), respectively. There were no significant differences in the incidence of adverse reactions (8.6% vs. 7.1%) and intrafilter pressure increases (12.7% vs. 16.8%) between the nafamostat mesilate and heparin groups. Adverse reactions of hemorrhage or blood pressure decreases associated with heparin use were not observed. There were no significant differences in rates of clinical remission (69.1% vs. 68.1%) and mucosal healing (62.9% vs. 63.6%) between the nafamostat mesilate and heparin groups. Thus, the safety and tolerability were comparable in the nafamostat mesilate and heparin groups, indicating that both nafamostat mesilate and heparin can be well tolerated as anticoagulants in LCAP for UC.