Masaaki Nakayama

Polymorphonuclear leukocyte injury by methylglyoxal and hydrogen peroxide: a possible pathological role for enhanced oxidative stress in chronic kidney disease (2008)

Nakayama, Masaaki, Nakayama, Keisuke, Zhu, Wan-Jun, Shirota, Yuko, Terawaki, Hiroyuki, Sato, Toshinobu, ...

Background. Accelerated burst of polymorphonuclear leukocytes (PMNs) may be involved in the primary pathology of enhanced oxidative stress in patients with chronic kidney disease (CKD); however, the...

Kidney dysfunction as a risk factor for first symptomatic stroke events in a general Japanese population--the Ohasama study (2007)

Nakayama, Masaaki, Metoki, Hirohito, Terawaki, Hiroyuki, Ohkubo, Takayoshi, Kikuya, Masahiro, Sato, Toshinobu, ...

Background. Chronic Kidney Disease (CKD) has been shown to be a risk factor for mortality as well as for morbidity such as cardiovascular disease (CVD) in the general population. However, in the...

Effect of repeated intravenous iron administration in haemodialysis patients on serum 8-hydroxy-2'-deoxyguanosine levels (2007)

Maruyama, Yukio, Nakayama, Masaaki, Yoshimura, Kazunobu, Nakano, Hirofumi, Yamamoto, Hiroyasu, Yokoyama, Keitaro, ...

Background. Iron supplementation is a mainstay for management of renal anaemia in patients receiving haemodialysis (HD). Although it is well known that a single intravenous iron (IVIR) administration...

Effect of repeated intravenous iron administration in haemodialysis patients on serum 8-hydroxy-2'-deoxyguanosine levels (2007)

Maruyama, Yukio, Nakayama, Masaaki, Yoshimura, Kazunobu, Nakano, Hirofumi, Yamamoto, Hiroyasu, Yokoyama, Keitaro, ...

Background. Iron supplementation is a mainstay for management of renal anaemia in patients receiving haemodialysis (HD). Although it is well known that a single intravenous iron (IVIR) administration...

Quantitative assessment of the peritoneal vessel density and vasculopathy in CAPD patients (2006)

Sherif, Ali M., Nakayama, Masaaki, Maruyama, Yukio, Yoshida, Hiraku, Yamamoto, Hiroyasu, Yokoyama, Keitaro, ...

Background. Peritoneal sclerosis (PS) complicates continuous ambulatory peritoneal dialysis (CAPD). Exploring the peritoneal vascular changes, which are characteristic histological findings in...

Quantitative assessment of the peritoneal vessel density and vasculopathy in CAPD patients (2006)

Sherif, Ali M., Nakayama, Masaaki, Maruyama, Yukio, Yoshida, Hiraku, Yamamoto, Hiroyasu, Yokoyama, Keitaro, ...

Background. Peritoneal sclerosis (PS) complicates continuous ambulatory peritoneal dialysis (CAPD). Exploring the peritoneal vascular changes, which are characteristic histological findings in...

Quantitative assessment of the peritoneal vessel density and vasculopathy in CAPD patients (2006)

Sherif, Ali M., Nakayama, Masaaki, Maruyama, Yukio, Yoshida, Hiraku, Yamamoto, Hiroyasu, Yokoyama, Keitaro, ...

Background. Peritoneal sclerosis (PS) complicates continuous ambulatory peritoneal dialysis (CAPD). Exploring the peritoneal vascular changes, which are characteristic histological findings in...

Photoluminescence properties of CdS and CdMnS quantum dots prepared by a reverse-micelle method (2005)

Kim, DaeGwi, Miyamoto, Masashi, Nakayama, Masaaki

We have investigated photoluminescence properties of CdS and CdMnS quantum dots (QDs) prepared by a reverse-micelle method. Before the surface modification, a broad luminescence band that originates...

Umklapp process in observation of coherent folded longitudinal acoustic phonons in a GaAs/AlAs long-period superlattice (2004)

Mizoguchi, Kohji, Hino, T., Nakayama, Masaaki, Dekorsy, Thomas, Bartels, Albrecht, Kurz, Heinrich, ...

Coherent folded longitudinal acoustic phonons in a GaAs/AlAs long-period superlattice (SL) have been investigated by using a reflection-type two-color pump–probe technique under the condition that...

IRMA (whole PTH) is a more useful assay for the effect of PTH on bone than the Allegro intact PTH assay in CAPD patients with low bone turnover marker (2003)

Tanno, Yudo, Yokoyama, Keitaro, Nakayama, Masaaki, Katoh, Akihiko, Yamamoto, Hiroyasu, Iwasaki, Yoshiko, ...

The common intact parathyroid hormone (i‐PTH) assay detects not only PTH (1–84) but also the PTH (7–84) fragment. Recently, it was reported that the PTH...

Plasma pteridine concentrations in patients with chronic renal failure (2002)

Yokoyama, Keitaro, Tajima, Masamich, Yoshida, Hiraku, Nakayama, Masaaki, Tokutome, Goro, Sakagami, Hiroshi, ...

Background. Pteridine metabolism is impaired in the uraemic state. This may affect cardiovascular function and contribute to malnutrition. We wished to clarify further the impact of impaired...

Development of a Rapid Chemosensitivity Test for Anticancer Drugs With Contact-Sensitive Monolayer of Balb/3T3 Cells (1989)

Nakayama, Masaaki, Nakano, Shuji, Koga, Tatsuhiko, Niho, Yoshiyuki

We investigated whether lethally irradiated, contact-sensitive Balb/3T3 cell confluent monolayers, termed “cell mats,” could be used for the screening of human tumors for sensitivity to...

The Influence of Hormone Spray on the Growth and Pigment Content of Tomato Fruit (1960)

TAKAHASHI, Toshiaki, NAKAYAMA, Masaaki

Experiments were carried out to measure the plant growth and the pigment and carbohydrate contents of fruits affected by hormone spray at Shinshu University Agricultural Faculty in 1959. Variety...

Clustering of Helicobacter pylori VacA in Lipid Rafts, Mediated by Its Receptor, Receptor-Like Protein Tyrosine Phosphatase β, Is Required for Intoxication in AZ-521 Cells▿

Nakayama, Masaaki, Hisatsune, Jyunzo, Yamasaki, Eiki, Nishi, Yoshito, Wada, Akihiro, Kurazono, Hisao, ...

Helicobacter pylori vacuolating cytotoxin, VacA, induces multiple effects on epithelial cells through different cellular events: one involves pore formation, leading to vacuolation, mitochondrial...

Helicobacter pylori VacA Enhances Prostaglandin E2 Production through Induction of Cyclooxygenase 2 Expression via a p38 Mitogen-Activated Protein Kinase/Activating Transcription Factor 2 Cascade in AZ-521 Cells▿

Hisatsune, Junzo, Yamasaki, Eiki, Nakayama, Masaaki, Shirasaka, Daisuke, Kurazono, Hisao, Katagata, Yohtaro, ...

Treatment of AZ-521 cells with Helicobacter pylori VacA increased cyclooxygenase 2 (COX-2) mRNA in a time- and dose-dependent manner. A p38 mitogen-activated protein kinase (MAPK) inhibitor,...

Impact of Uremia, Diabetes, and Peritoneal Dialysis Itself on the Pathogenesis of Peritoneal Sclerosis: A Quantitative Study of Peritoneal Membrane Morphology

Honda, Kazuho, Hamada, Chieko, Nakayama, Masaaki, Miyazaki, Masanobu, Sherif, Ali M., Harada, Takashi, ...

Background and objectives: Peritoneal interstitial fibrosis and hyalinizing vasculopathy were induced by peritoneal dialysis and other associated conditions (e.g., uremia). A quantitative method for...