Matsudaira Kazunari

写真a

Title

Assistant Professor
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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Graduate School of Medicine   Assistant Professor  

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Published Papers 【 display / non-display 】

  • Viral load of Torquetenovirus correlates with Sano's score and levels of total bilirubin and aspartate aminotransferase in Kawasaki disease

    Pietro Giorgio Spezia, Kazunari Matsudaira, Fabio Filippini, Takako Miyamura, Keiko Okada, Yoshiro Nagao, Takafumi Ishida, Tetsuya Sano, Mauro Pistello, Fabrizio Maggi, Junichi Hara

    Scientific Reports ( Springer Science and Business Media LLC )  13 ( 1 )   2023.10 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    Abstract Cause of Kawasaki disease (KD) is unknown. KD is often resistant to treatment with intravenous immunoglobulin (IVIG). Sano's score, which is derived from total bilirubin (TBIL), aspartate aminotransferase (AST) and C-reactive protein (CRP), is predictive of IVIG resistance in Japan. A recent study reported that Torquetenovirus (TTV), especially TTV7, was present at a high viral load in the patients with KD. We used PCR to quantify TTV load and amplicon next generation sequencing to detect individual TTV species. We used serum samples that were collected between 2002 and 2005 from 57 Japanese KD patients before IVIG treatment. Correlations between TTV load and Sano's score, the biomarkers that constitute this score, and IVIG resistance were examined. TTV load was positively correlated with Sano's score (P = 0.0248), TBIL (P = 0.0004), and AST (P = 0.0385), but not with CRP (P = 0.6178). TTV load was marginally correlated with IVIG resistance (P = 0.1544). Presence of TTV7 was correlated with total TTV load significantly (P = 0.0231). The correlations between biomarkers for KD and TTV load suggested that TTV may play a role in the pathophysiology of KD. We hypothesize that TTV7 may be associated with a higher total viral load in KD.

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  • Time-series analysis of satellite imagery for detecting vegetation cover changes in Indonesia

    Takuro Furusawa, Takuya Koera, Rikson Siburian, Agung Wicaksono, Kazunari Matsudaira, Yoshinori Ishioka

    Scientific Reports ( Springer Science and Business Media LLC )  13 ( 1 ) 8437   2023.05 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    Abstract Indonesia has one of the world's largest tropical forests; thus, its deforestation and environmental degradation are a global concern. This study is the first to perform comprehensive big data analyses with coherent vegetation criteria to measure the vegetation change at a high temporal resolution (every 16-day period) for 20 years and the high administrative resolution (regency or city) all over Indonesia. The normalized difference vegetation index (NDVI) of the Moderate Resolution Imaging Spectroradiometer is analyzed through state space modeling. The findings reveal that the NDVI increases in almost all regencies, except in urban areas. A high correlation between the NDVI change and the time is observed in Sumatra, Papua, and Kalimantan. The gain of the NDVI values is obvious in the Central and Eastern Java Island. Human activities, such as the expansion of agriculture and forestry and forest conservation policies, are the key factors for the observed pattern.

  • Macaque progressions: passing order during single-file movements reflects the social structure of a wild stump-tailed macaque group

    Aru Toyoda, Tamaki Maruhashi, Suchinda Malaivijitnond, Kazunari Matsudaira, Zin Arai, Ikki Matsuda, Hiroki Koda

    Primates ( Springer Science and Business Media LLC )    2023.02 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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  • Genetic Diversity of White-Handed Gibbon Hylobates lar (Linnaeus, 1771) at Ywar Kaing Kaung Village in Dawna Mountain Range Corridor

    No No Wai, Kazunari Matsudaira, Takafumi Ishida, Aye Mi San

    Journal of the Myanmar Academy of Arts and Science   21 ( 3 ) 1 - 10   2023 [ Peer Review Accepted ]

    Type of publication: Research paper (other science council materials etc.)

  • Phylogeography of Long-tailed Macaque, Macaca fascicularis aurea I. Geoffroy [1831] from Mon and Kayin States, Myanmar

    Phyu Pyar Tin, Kazunari Matsudaira, Aye Mi San

    Journal of the Myanmar Academy of Arts and Science   21 ( 3 ) 11 - 20   2023 [ Peer Review Accepted ]

    Type of publication: Research paper (other science council materials etc.)

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Other Papers 【 display / non-display 】

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