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Search: authors:"Takeshi Yoshioka"

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Imaging Mass Spectrometry Revealed the Accumulation Characteristics of the 2-Nitroimidazole-Based Agent “Pimonidazole” in Hypoxia

Hypoxia, or low oxygen concentration, is a key factor promoting tumor progression and angiogenesis and resistance of cancer to radiotherapy and chemotherapy. 2-Nitroimidazole-based agents have been widely used in pathological and nuclear medicine examinations to detect hypoxic regions in tumors; in particular, pimonidazole is used for histochemical staining of hypoxic regions. It...

Imaging Mass Spectrometry Reveals Acyl-Chain- and Region-Specific Sphingolipid Metabolism in the Kidneys of Sphingomyelin Synthase 2-Deficient Mice

Obesity was reported to cause kidney injury by excessive accumulation of sphingolipids such as sphingomyelin and ceramide. Sphingomyelin synthase 2 (SMS2) is an important enzyme for hepatic sphingolipid homeostasis and its dysfunction is considered to result in fatty liver disease. The expression of SMS2 is also high in the kidneys. However, the contribution of SMS2 on renal...

Role of TRPV3 in immune response to development of dermatitis

Background Recently, it has been reported that the Gly573Ser substitution of transient receptor potential V3 (TRPV3) leads to increased ion-channel activity in keratinocytes. Our previous studies have indicated that the spontaneous hairless and dermatitis phenotypes of DS-Nh mice, which were newly established as an animal model of atopic dermatitis (AD), are caused by...

Relation of Streptococcal Pyrogenic Exotoxin C as a Causative Superantigen for Kawasaki Disease

We previously reported that the frequency of TCRBV2 and TCRBV6S5-bearing T-cells was high in patients in the acute phase of Kawasaki disease (KD) and that streptococcal pyrogenic exotoxin C (SPE-C) was a potent stimulator of these TCRBV-bearing T-cells. To further elucidate the pathogenesis of KD, we examined the T-cell receptor (TCR) repertoire, human leukocyte antigen (HLA...

Does Streptococcal Pyrogenic Exotoxin-C Trigger the Onset of Kawasaki Disease? -Association between Superantigens and Autoantibody against Vascular Smooth Muscle Cells-

I) T cell receptor (TCR) usage We investigated TCR usage and antibody responses to streptococcal pyrogenic exotoxin-C (SPE-C) in order to determine whether an association exists between SPE-C and the onset of Kawasaki disease (KD). Patients and Method Fifty-four patients with KD were studied. Analysis of TCR usage was performed by adaptor-ligation PCR and microplate hybridization...