The University of Tokyo · Medicine
Professor Hiroshi Nishi's research lab focuses on renal pathophysiology, with a particular emphasis on the interplay between mineral metabolism, inflammation, and kidney injury. Key research directions include the role of vitamin D metabolites and fibroblast growth factor-23 (FGF-23) in mineral bone disorders, neutrophil-mediated glomerular inflammation in glomerulonephritis and lupus nephritis, and the development of uremic sarcopenia and chronic kidney disease after transplantation. The lab also investigates complications such as thrombotic microangiopathy in transplant recipients, especially in the context of calcineurin inhibitor use. These studies aim to identify novel therapeutic targets and improve outcomes in chronic kidney disease and post-transplantation settings.
Figures are computed from collected data and may differ slightly.
Intravenous calcitriol decreased serum intact PTH level and increased serum FGF-23 levels significantly. Extremely high levels of serum FGF-23 in these patients may be attributed, at least in part, to the cumulative dose of vitamin D.
The kidney glomerular capillaries are frequent sites of immune complex deposition and subsequent neutrophil accumulation in post-infectious and rapidly progressive glomerulonephritis. However, the mechanisms of neutrophil recruitment remain enigmatic, and there is no targeted therapeutic to avert this proximal event in glomerular inflammation. The uniquely human activating Fc receptor FcγRIIA promotes glomerular neutrophil accumulation and damage in anti-glomerular basement membrane-induced (ant
Sustained physical activity extends healthy life years while a lower activity due to sarcopenia can reduce them. Sarcopenia is defined as a decrease in skeletal muscle mass and strength due not only to aging, but also from a variety of debilitating chronic illnesses such as cancer and heart failure. Patients with chronic kidney disease (CKD), who tend to be cachexic and in frail health, may develop uremic sarcopenia or uremic myopathy due to an imbalance between muscle protein synthesis and cata
A greater understanding of the neutrophil dependent mechanisms that promote lupus nephritis may potentially inform on newer therapeutic options that target neutrophil accumulation and reactivity in the nephritic kidney.
Thrombotic microangiopathy (TMA) is a well-documented but severe complication that occurs after solid-organ transplant. Administration of calcineurin inhibitors is considered a major cause of this fatal complication; prompt initiation of plasma exchange therapy after reduction or conversion of calcineurin inhibitors has been recommended. Nevertheless, little is known about clinical evidence of this strategy against TMA after solid-organ, especially non-renal-organ, transplantation. Medical recor
Chronic kidney disease (CKD) is one of the common complications after deceased donor liver transplantation. Although the worldwide pressing shortage in deceased donors has directed attention to living donor liver transplantation (LDLT), LDLT cohort data focusing on chronic renal dysfunction is limited. A total of 280 adult LDLT recipients (median 49 yr, 156 men) at the University of Tokyo hospital between 1996 and 2006 were reviewed. A total of 224 pre-transplant liver failure patients (80.0%) s
Although venous thrombosis is one of the common complications in nephrotic patients, cerebral venous thrombosis (CVT) is rarely reported. CVT is so difficult to be detected by conventional diagnostic methods that it is sometimes overlooked despite its potential severity. We report a 79-year-old female with nephrotic syndrome due to systemic amyloidosis who suddenly altered mental status during her hospitalization. The underlying etiology had been not identified by physical examinations, various
Autoimmune pancreatitis (AIP) is a rare subtype of chronic pancreatitis. AIP has been suggested to be complicated by tubulointerstitial nephritis or glomerulonephritis, implying that the kidney is involved as a phenotype of IgG4-positive multi-organ lymphoproliferative syndrome; however, the clinical significance of this novel entity is not well-defined.We conducted a retrospective cohort analysis of 47 (male, 39; female, 8) AIP patients.The patients (mean age, 70.3 +/- 9.5 years) had a mean obs
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