2017 Fiscal Year Annual Research Report
The role of Heme Oxygenase-1 in neonatal sepsis using preterm mouse model
Project/Area Number |
16H06971
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Research Institution | Kobe University |
Principal Investigator |
藤岡 一路 神戸大学, 医学部附属病院, 講師 (20568810)
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Project Period (FY) |
2016-08-26 – 2018-03-31
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Keywords | 早産児マウス敗血症モデル / 新生児 / 早産児敗血症 / 動物モデル / Heme Oxygenase / 糞便懸濁液 / ノックアウトマウス / 非外科的敗血症モデル |
Outline of Annual Research Achievements |
本年度は、前年度に引き続き①早産児マウス敗血症モデルにおける部分的HO-1欠損の影響、および②当該モデル対するHemeを用いた薬物的HO-1誘導の有効性の検討を行った。 方法は、免疫学的にヒト早産相当である4日齢の野生型マウス(WT)およびHetに、成獣マウスの虫垂内容物から作成した糞便懸濁液(Cecal slurry, CS 2.0mg/g BW)を腹腔内投与し、肝臓HO活性、死亡率、網羅的遺伝子発現を比較した。次に、3日齢のHetにHO-1誘導薬であるHeme(30 micro mol/kg)を投与後、敗血症を誘導し(H-Het)、HO-1誘導の救済効果を検討した。 結果は、Hetの平常時の肝臓HO活性はWTより30%低く(Het 212±28 vs WT 302±41 pmol CO/h/mg FW, p<0.01)、敗血症誘導24h後でもWTより36%低かった(312±29 vs 485±56, p<0.01)。一方、H-Hetでは敗血症誘導前の肝臓HO活性(335±39)はWT相当に達した。Hetの死亡率はWTと比して有意に高かったが(Het 85% vs WT 41%, p<0.01)、H-Hetでは著明に改善した(24%, p<0.01)。平常時の肝臓遺伝子発現はHetとWTで差が無かったが、敗血症誘導6h後にはHetではWTと比して有意なTLR5の増加、CCR4、CD4、IFNGR1の低下を認めた。同じく敗血症誘導6h後のH-Hetでは、Hetと比して有意な炎症関連遺伝子(Il23a,Irf7,Ticam1)の低下を認めた。 結論として、HO-1誘導不全は早産児マウス敗血症モデルを重症化させる。一方、予防的HO-1誘導により、炎症抑制を介して、これら感受性個体を救済できる可能性が示唆された。
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Research Progress Status |
29年度が最終年度であるため、記入しない。
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Strategy for Future Research Activity |
29年度が最終年度であるため、記入しない。
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[Journal Article] A genome-wide association study identifies only two ancestry specific variants associated with spontaneous preterm birth.2018
Author(s)
Rappoport N, Toung J, Hadley D, Wong RJ, Fujioka K, Jelliffe-Pawlowski LL, Gould JB, Darmstadt GL, Wang X, Bustamante CD, Snyder MP, Ziv E, Patsopoulos NA, Muglia LJ, Burchard E, Shaw GM, O'Brodovich HM, Stevenson DK, Butte AJ, Sirota M, et al.
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Journal Title
Sci Rep.
Volume: 8(1)
Pages: 226
DOI
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Nontypeable Haemophilus Influenzae Sepsis in a Term Neonate2018
Author(s)
SAKI OKUBO, KAZUMICHI FUJIOKA, MEGUMI YAMANE, MARIKO ASHINA, SACHIYO FUKUSHIMA, TOSHIHIKO IKUTA, SHOHEI OHYAMA, KEIJI YAMANA, AKIKO KOBAYASHI, KAZUMOTO IIJIMA, ICHIRO MORIOKA
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Journal Title
Kobe Journal of Medical Sciences
Volume: 4
Pages: 105-108
Peer Reviewed / Open Access
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[Journal Article] A Case of Congenital Complete Atrioventricular Block Treated with Transdermal Tulobuterol2018
Author(s)
TOSHIHIKO IKUTA, KAZUMICHI FUJIOKA, YUMI SATO, MARIKO ASHINA, SACHIYO FUKUSHIMA, SHOHEI OHYAMA, SAKI OKUBO, KEIJI YAMANA, MAYUMI MORIZANE, KENJI TANIMURA, MASASHI DEGUCHI, KAZUMOTO IIJIMA, ICHIRO MORIOKA, HIDETO YAMADA
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Journal Title
Kobe Journal of Medical Sciences
Volume: 4
Pages: 109-112
Peer Reviewed / Open Access
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[Journal Article] Involvement of WNT Signaling in the Regulation of Gestational Age-Dependent Umbilical Cord-Derived Mesenchymal Stem Cell Proliferation.2017
Author(s)
Iwatani S, Shono A, Yoshida M, Yamana K, Thwin KKM, Kuroda J, Kurokawa D, Koda T, Nishida K, Ikuta T, Fujioka K, Mizobuchi M, Taniguchi-Ikeda M, Morioka I, Iijima K, Nishimura N.
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Journal Title
Stem Cells Int.
Volume: 2017
Pages: 8749751
DOI
Peer Reviewed / Open Access
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[Journal Article] Gestational Age-Dependent Increase of Survival Motor Neuron Protein in Umbilical Cord-Derived Mesenchymal Stem Cells.2017
Author(s)
Iwatani S, Harahap NIF, Nurputra DK, Tairaku S, Shono A, Kurokawa D, Yamana K, Thwin KKM, Yoshida M, Mizobuchi M, Koda T, Fujioka K, Taniguchi-Ikeda M, Yamada H, Morioka I, Iijima K, Nishio H, Nishimura N.
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Journal Title
Front Pediatr.
Volume: 5
Pages: 194
DOI
Peer Reviewed / Open Access
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[Journal Article] Evaluation of BiliCare transcutaneous bilirubin device in Japanese newborns.2017
Author(s)
Yamana K, Morioka I, Kurokawa D, Fukushima S, Nishida K, Ohyama S, Nishimura N, Nozu K, Taniguchi-Ikeda M, Nagase H, Fujioka K, Iwatani S, Nakamura H, Iijima K.
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Journal Title
Pediatr Int.
Volume: 59(10)
Pages: 1058-1063.
DOI
Peer Reviewed
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[Presentation] BRAIN MAGNETIC RESONANCE IMAGING FINDINGS IN IN INFANTS WITH CONGENITAL CYTOMEGALOVIRUS INFECTION EARLY IN LIFE2017
Author(s)
Nishida K, Iwatani S, Kurokawa D, Yamana K, Ohyama S, Fujioka K, Nagase H, Sugioka Y, Nishii T, Iijima K, Morioka I
Organizer
Pediatric Academic Societies Meeting
Int'l Joint Research
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[Presentation] POSTNATAL AGE-SPECIFIC REFERENCE RANGES OF SERUM PROCALCITONIN LEVELS IN JAPANESE NEWBORN INFANTS2017
Author(s)
Morioka I, Iwatani S, Ohyama S, Yamana K, Nishida K, Kurokawa D, Fujioka K, Fukuzumi N, Sato I, Osawa K, Iijima K
Organizer
Pediatric Academic Societies Meeting
Int'l Joint Research
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[Presentation] A new evaluation index for left-right unequal ventriculomegaly in very low birth weight infants: Association with walking disabilities at 1.6 years of corrected age2017
Author(s)
Ikuta T, Mizobuchi M, Katayama Y, Yoshimoto S, Ioroi T, Yamane M, Morisawa T, Takatera A, Ueda M, Shibata A, Maeyama K, Fujioka K, Nishimura N, Iijima K, Morioka I.
Organizer
The 2nd Congress of joint European Neonatal Society
Int'l Joint Research
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