Faculty Profiles - TOYOKUNI Shinya

Papers - TOYOKUNI Shinya

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BRCA1のハプロ不全は発がん過程において、フェロトーシス抵抗性を獲得することにより染色体増幅を促進する(BRCA1 haploinsufficiency promotes carcinogenic chromosomal amplification by ferroptosis-resistance)

孔穎怡, 赤塚慎也, 本岡大社, 鄭好, 白木之浩, 真下知士, 今岡達彦, 豊國伸哉

Biomedical Research on Trace Elements Vol. 33 ( 1 ) page： 130 - 130 2022.9

BRCA1遺伝子ハプロ不全モデルラットを用いた卵巣予備能低下の検証(Validation of reduced ovarian reserve in BRCA1 haploinsufficient rats.)

曽根原玲菜, 本岡大社, 梶山広明, 真下知士, 今岡達彦, 豊國伸哉

日本癌学会総会記事 Vol. 81回 page： P - 3012 2022.9

BRCA1欠損はフェロトーシス抵抗性を誘導することによりアスベスト誘発性腹膜中皮腫を促進する(Ferroptosis resistance is induced by BRCA1 deficiency in asbestos-induced mesothelioma)

羅亜光, 本岡大社, 赤塚慎也, 真下知士, 今岡達彦, 豊國伸哉

日本癌学会総会記事 Vol. 81回 page： P - 2003 2022.9

環境因子であるタルクおよびアスベストの卵巣発がん性とゲノム毒性の検討(Carcinogenic genome toxicity of environmental factors, asbestos and talc in ovary)

本岡大社, 鬼丸洸, 鈴木洋, 片渕充沙子, 近藤英治, 田代浩徳, 片渕秀隆, 豊國伸哉

日本癌学会総会記事 Vol. 81回 page： P - 2007 2022.9

BRCA1のハプロ不全は発がん過程において、フェロトーシス抵抗性を獲得することにより染色体増幅を促進する(BRCA1 haploinsufficiency promotes carcinogenic chromosomal amplification by ferroptosis-resistance) Reviewed International journal

孔穎怡, 赤塚慎也, 本岡大社, 鄭好, 白木之浩, 真下知士, 今岡達彦, 豊國伸哉

Biomedical Research on Trace Elements Vol. 33 ( 1 ) page： 130 - 130 2022.9

個別化予防医療・先制医療 BRCA1のハプロ不全は、腎臓発がん過程において、フェロトーシス抵抗性を獲得することにより染色体増幅を促進する(BRCA1 haploinsufficiency promotes chromosomal amplification under renal carcinogenesis through ferroptosis-resistance) Reviewed International journal

孔穎怡, 赤塚慎也, 本岡大社, 鄭好, 白木之浩, 真下知士, 今岡達彦, 豊國伸哉

日本癌学会総会記事 Vol. 81回 page： S20 - 7 2022.9

BRCA1 haploinsufficiency promotes chromosomal amplification under Fenton reaction-based carcinogenesis through ferroptosis-resistance. Reviewed International journal Open Access

Yingyi Kong, Shinya Akatsuka, Yashiro Motooka, Hao Zheng, Zhen Cheng, Yukihiro Shiraki, Tomoji Mashimo, Tatsuhiko Imaoka, Shinya Toyokuni

Redox biology Vol. 54 page： 102356 - 102356 2022.8

Language：English Publishing type：Research paper (scientific journal)

Germline-mutation in BRCA1 tumor suppressor gene is an established risk for carcinogenesis not only in females but also in males. Deficiency in the repair of DNA double-strand breaks is hypothesized as a responsible mechanism for carcinogenesis. However, supporting data is insufficient both in the mutation spectra of cancers in the patients with BRCA1 germline-mutation and in murine knockout/knock-in models of Brca1 haploinsufficiency. Furthermore, information on the driving force toward carcinogenesis in BRCA1 mutation carriers is lacking. Here we applied Fenton reaction-based renal carcinogenesis to a rat heterozygously knockout model of BRCA1 haploinsufficiency (mutant [MUT] model; L63X/+). Rat MUT model revealed significant promotion of renal cell carcinoma (RCC) induced by ferric nitrilotriacetate (Fe-NTA). Array-based comparative genome hybridization of the RCCs identified significant increase in chromosomal amplification, syntenic to those in breast cancers of BRCA1 mutation carriers, including c-Myc, in comparison to those in the wild-type. Subacute-phase analysis of the kidney after repeated Fe-NTA treatment in the MUT model revealed dysregulated iron metabolism with mitochondrial malfunction assessed by expression microarray and electron microscopy, leading to renal tubular proliferation with iron overload. In conclusion, we for the first time demonstrate that biallelic wild-type BRCA1 provides more robust protection for mitochondrial metabolism under iron-catalyzed oxidative stress, preventing the emergence of neoplastic cells with chromosomal amplification. Our results suggest that oxidative stress via excess iron is a major driving force for carcinogenesis in BRCA1 haploinsufficiency, which can be a target for cancer prevention and therapeutics.

DOI： 10.1016/j.redox.2022.102356

Hippo-TAZ signaling is the master regulator of the onset of triple-negative basal-like breast cancers Reviewed International journal Open Access

Hirotoshi Soyama, Miki Nishio, Junji Otani, Toshiko Sakuma, Shintaro Takao, Shigeo Hara, Takaaki Masuda, Koshi Mimori, Shinya Toyokuni, John P. Lydon, Kazuwa Nakao, Hiroshi Nishina, Takumi Fukumoto, Tomohiko Maehama, Akira Suzuki

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA Vol. 119 ( 29 ) page： e2123134119 2022.7

Language：English Publishing type：Research paper (scientific journal) Publisher：NATL ACAD SCIENCES

Breast cancer is the most frequent malignancy in women worldwide. Basal-like breast cancer (BLBC) is the most aggressive form of this disease, and patients have a poor prognosis. Here, we present data suggesting that the Hippo-transcriptional coactivator with PDZ-binding motif (TAZ) pathway is a key driver of BLBC onset and progression. Deletion of Mob1a/b in mouse mammary luminal epithelium induced rapid and highly reproducible mammary tumorigenesis that was dependent on TAZ but not yes-associated protein 1 (YAP1). In situ early-stage BLBC-like malignancies developed in mutant animals by 2 wk of age, and invasive BLBC appeared by 4 wk. In a human estrogen receptor(+) luminal breast cancer cell line, TAZ hyperactivation skewed the features of these luminal cells to the basal phenotype, consistent with the aberrant TAZ activation frequently observed in human precancerous BLBC lesions. TP53 mutation is rare in human precancerous BLBC but frequent in invasive BLBC. Addition of Trp53 deficiency to our Mob1a/b-deficient mouse model enhanced tumor grade and accelerated cancer progression. Our work justifies targeting the Hippo-TAZ pathway as a therapy for human BLBC, and our mouse model represents a powerful tool for evaluating candidate agents.

DOI： 10.1073/pnas.2123134119

Hepatocyte growth factor derived from senescent cells attenuates cell competition-induced apical elimination of oncogenic cells. Reviewed International journal Open Access

Nanase Igarashi, Kenichi Miyata, Tze Mun Loo, Masatomo Chiba, Aki Hanyu, Mika Nishio, Hiroko Kawasaki, Hao Zheng, Shinya Toyokuni, Shunsuke Kon, Keiji Moriyama, Yasuyuki Fujita, Akiko Takahashi

Nature communications Vol. 13 ( 1 ) page： 4157 - 4157 2022.7

Language：English Publishing type：Research paper (scientific journal)

Cellular senescence and cell competition are important tumor suppression mechanisms that restrain cells with oncogenic mutations at the initial stage of cancer development. However, the link between cellular senescence and cell competition remains unclear. Senescent cells accumulated during the in vivo aging process contribute toward age-related cancers via the development of senescence-associated secretory phenotype (SASP). Here, we report that hepatocyte growth factor (HGF), a SASP factor, inhibits apical extrusion and promotes basal protrusion of Ras-mutated cells in the cell competition assay. Additionally, cellular senescence induced by a high-fat diet promotes the survival of cells with oncogenic mutations, whereas crizotinib, an inhibitor of HGF signaling, provokes the removal of mutated cells from mouse livers and intestines. Our study provides evidence that cellular senescence inhibits cell competition-mediated elimination of oncogenic cells through HGF signaling, suggesting that it may lead to cancer incidence during aging.

DOI： 10.1038/s41467-022-31642-4

Diluted aqueous extract of heat-not-burn tobacco product smoke causes less oxidative damage in fibroblasts than conventional cigarette International journal Open Access

Qinying Lyu, Li Jiang, Hao Zheng, Shotaro Hayashi, Kotaro Sato, Shinya Toyokuni

Journal of Clinical Biochemistry and Nutrition Vol. 71 ( 1 ) page： 55 - 63 2022.7

Language：English Publishing type：Research paper (scientific journal) Publisher：The Society for Free Radical Research Japan

<p>Smoke from conventional cigarettes (C-cigarettes) contains various reactive oxygen species and toxic chemicals, which potentially cause oxidative damage not only to airways but also to the whole body, leading eventually to diseases, including emphysema, advanced atherosclerosis, and cancer. Many heat-not-burn tobacco products (HTPs) have been commercialized recently in Japan to maintain the smoking population by advertising that HTPs are less toxic. However, there were few studies reported from neutral organizations whether HTPs are indeed less damaging. To evaluate the potential capacity of HTPs to induce oxidative stress, we here compared two different HTPs with two types of C-cigarettes, using human fibroblast IMR90SV cells and 5% aqueous extracts in 10-ml phosphate-buffered saline (50-ml smoke/10 s). HTPs exhibited significantly lower oxidative toxicity in comparison to C-cigarettes. Whereas C-cigarettes induced ferroptosis in fibroblasts, the effects of HTPs were significantly reduced by measuring the levels of peroxides, pro-inflammatory cytokine expression, autophagy, catalytic Fe(II) and 8-hydroxy-2'-deoxyguanosine. Notably, major portions of C-cigarettes-induced pathogenic responses were inhibited by catalase. However, HTPs still induced p62 autophagy-adaptor at 5%-dilution and caused lethal effects to fibroblasts with undiluted solution. In conclusion, HTPs smoke <i>per se</i> can be toxic despite less toxicity in comparison to C-cigarettes, which warrants further investigation.</p>

DOI： 10.3164/jcbn.21-134

Guidelines for measuring reactive oxygen species and oxidative damage in cells and in vivo. International journal Open Access

Murphy MP, Bayir H, Belousov V, Chang CJ, Davies KJA, Davies MJ, Dick TP, Finkel T, Forman HJ, Janssen-Heininger Y, Gems D, Kagan VE, Kalyanaraman B, Larsson NG, Milne GL, Nyström T, Poulsen HE, Radi R, Van Remmen H, Schumacker PT, Thornalley PJ, Toyokuni S, Winterbourn CC, Yin H, Halliwell B

Nature metabolism Vol. 4 ( 6 ) page： 651 - 662 2022.6

Language：English Publishing type：Research paper (scientific journal) Publisher：Nature Metabolism

Multiple roles of reactive oxygen species (ROS) and their consequences for health and disease are emerging throughout biological sciences. This development has led researchers unfamiliar with the complexities of ROS and their reactions to employ commercial kits and probes to measure ROS and oxidative damage inappropriately, treating ROS (a generic abbreviation) as if it were a discrete molecular entity. Unfortunately, the application and interpretation of these measurements are fraught with challenges and limitations. This can lead to misleading claims entering the literature and impeding progress, despite a well-established body of knowledge on how best to assess individual ROS, their reactions, role as signalling molecules and the oxidative damage that they can cause. In this consensus statement we illuminate problems that can arise with many commonly used approaches for measurement of ROS and oxidative damage, and propose guidelines for best practice. We hope that these strategies will be useful to those who find their research requiring assessment of ROS, oxidative damage and redox signalling in cells and in vivo.

DOI： 10.1038/s42255-022-00591-z

Cytotoxicity of plasma-irradiated lactate solution produced under atmospheric airtight conditions and generation of the methyl amino group Reviewed International journal

Daiki Ito, Naoyuki Iwata, Kenji Ishikawa, Kae Nakamura, Hiroshi Hashizume, Camelia Miron, Hiromasa Tanaka, Hiroaki Kajiyama, Shinya Toyokuni, Masaaki Mizuno, Masaru Hori

APPLIED PHYSICS EXPRESS Vol. 15 ( 5 ) 2022.5

Language：English Publishing type：Research paper (scientific journal) Publisher：IOP Publishing Ltd

Ringer's lactate solution was irradiated with non-equilibrium plasma under airtight conditions. The plasma-activated lactate (PAL) was produced with argon, oxygen, and nitrogen gases following purging of Ar. Cytotoxicity could be controlled by diluting PAL, and a killing effect was selectively obtained on cancer cells compared to normal cells for Ar+O-2+N-2 PALs. Nonetheless, cytotoxicity was partly reproduced by similar concentrations of H2O2 and NO2 (-) in the PALs. The organics produced by plasma irradiation to lactate were investigated using nuclear magnetic resonance, and the generation of methyl amino species was confirmed.

DOI： 10.35848/1882-0786/ac6360

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PCBP2 knockdown promotes ferroptosis in malignant mesothelioma. Reviewed International journal Open Access

Lin Yue, Yaguang Luo, Li Jiang, Yoshitaka Sekido, Shinya Toyokuni

Pathology international Vol. 72 ( 4 ) page： 242 - 251 2022.4

Language：English Publishing type：Research paper (scientific journal)

Malignant mesothelioma (MM) is still increasing worldwide. The pathogenesis depends on asbestos-induced iron accumulation, which eventually leads to ferroptosis-resistance of mesothelial cells via somatic mutations. Poly (rC)-binding proteins 1 and 2 (PCBP1/2) are recently recognized cytosolic Fe(II) chaperones. Here we studied the role of PCBP1/2 in rat/human mesothelial and MM cells as well as rat/human MM specimens. Normal peritoneal mesothelial cells in rats exhibited PCBP1 but not PCBP2 immunopositivity whereas primary/immortalized mesothelial cells showed PCBP1/2 immunopositivity. Rat MM specimens induced by intraperitoneal injection of chrysotile, including in situ lesion, revealed PCBP1/2 immunopositivity (90% for both) in the nucleus and cytoplasm with a tendency of higher expression in epithelioid subtype. Knockdown of PCBP2 but not PCBP1 significantly decreased both TfR1 and FTH expression in MM cells with inhibition of proliferation, indicating stagnation of intracellular iron transport. Erastin, a cysteine-deprivation type ferroptosis inducer, decreased the expression of both PCBP1/2 in MM cells. Furthermore, PCBP2 knockdown significantly increased the sensitivity of MM cells to erastin-induced ferroptosis with increased catalytic Fe(II). In conclusion, PCBP2 works for ferroptosis-resistance not only during mesothelial carcinogenesis but also in MM, which warrants further investigation as a novel therapeutic target.

DOI： 10.1111/pin.13209

タルクは曝露卵巣に鉄過剰状態とフェロトーシス抵抗性を誘導し発がんに関わる

井上陽太, 本岡大社, 豊國伸哉

日本病理学会会誌 Vol. 111 ( 1 ) page： 353 - 353 2022.3

アスベストはヘモグロビンを吸着し卵巣表層上皮に鉄過剰状態を形成することで卵巣がん形成に関わる

本岡大社, 豊國伸哉

日本病理学会会誌 Vol. 111 ( 1 ) page： 249 - 249 2022.3

CD153/CD30 signaling promotes age-dependent tertiary lymphoid tissue expansion and kidney injury

Sato Yuki, Oguchi Akiko, Fukushima Yuji, Masuda Kyoko, Toriu Naoya, Taniguchi Keisuke, Yoshikawa Takahisa, Cui Xiaotong, Kondo Makiko, Hosoi Takeshi, Komidori Shota, Shimizu Yoko, Fujita Harumi, Jiang Li, Kong Yingyi, Yamanashi Takashi, Seita Jun, Yamamoto Takuya, Toyokuni Shinya, Hamazaki Yoko, Hattori Masakazu, Yoshikai Yasunobu, Boor Peter, Floege Jürgen, Kawamoto Hiroshi, Murakawa Yasuhiro, Minato Nagahiro, Yanagita Motoko

Journal of Clinical Investigation Vol. 132 ( 2 ) 2022.1

Language：English Publishing type：Research paper (scientific journal)

Tertiary lymphoid tissues (TLTs) facilitate local T- and B-cell interactions in chronically inflamed organs. However, the cells and molecular pathways that govern TLT formation are poorly defined. Here we identify TNF superfamily CD153-CD30 signaling between two unique age-dependent lymphocyte subpopulations, CD153⁺PD-1⁺CD4⁺ senescence-associated T (SAT) cells and CD30+T-bet+ age-associated B cells (ABCs), as a driver for TLT expansion. SAT cells, which produced ABC-inducing factors IL21 and IFNγ, and ABCs progressively accumulated within TLTs in aged kidneys after injury. Notably, in kidney injury models, CD153 or CD30 deficiency impaired functional SAT cell induction, which resulted in reduced ABC numbers and attenuated TLT formation with improved inflammation, fibrosis and renal function. Attenuated TLT formation after transplantation of CD153-deficient bone marrow further supported the importance of CD153 in immune cells. Clonal analysis revealed that SAT cells and ABCs in the kidneys arose from both local differentiation and recruitment from the spleen. In the synovium of aged rheumatoid arthritis patients, T peripheral helper/T follicular helper cells and ABCs also expressed CD153 and CD30, respectively. Together, our data reveal a previously unappreciated function of CD153-CD30 signaling in TLT formation and propose targeting CD153-CD30 signaling pathway as a therapeutic target for slowing kidney disease progression.

CiNii Research

CD153/CD30 signaling promotes age-dependent tertiary lymphoid tissue expansion and kidney injury. International journal

Yuki Sato, Akiko Oguchi, Yuji Fukushima, Kyoko Masuda, Naoya Toriu, Keisuke Taniguchi, Takahisa Yoshikawa, Xiaotong Cui, Makiko Kondo, Takeshi Hosoi, Shota Komidori, Yoko Shimizu, Harumi Fujita, Li Jiang, Yingyi Kong, Takashi Yamanashi, Jun Seita, Takuya Yamamoto, Shinya Toyokuni, Yoko Hamazaki, Masakazu Hattori, Yasunobu Yoshikai, Peter Boor, Jürgen Floege, Hiroshi Kawamoto, Yasuhiro Murakawa, Nagahiro Minato, Motoko Yanagita

The Journal of clinical investigation Vol. 132 ( 2 ) 2022.1

Language：English Publishing type：Research paper (scientific journal)

Tertiary lymphoid tissues (TLTs) facilitate local T and B cell interactions in chronically inflamed organs. However, the cells and molecular pathways that govern TLT formation are poorly defined. Here, we identified TNF superfamily CD153/CD30 signaling between 2 unique age-dependent lymphocyte subpopulations, CD153+PD-1+CD4+ senescence-associated T (SAT) cells and CD30+T-bet+ age-associated B cells (ABCs), as a driver for TLT expansion. SAT cells, which produced ABC-inducing factors IL-21 and IFN-γ, and ABCs progressively accumulated within TLTs in aged kidneys after injury. Notably, in kidney injury models, CD153 or CD30 deficiency impaired functional SAT cell induction, which resulted in reduced ABC numbers and attenuated TLT formation with improved inflammation, fibrosis, and renal function. Attenuated TLT formation after transplantation of CD153-deficient bone marrow further supported the importance of CD153 in immune cells. Clonal analysis revealed that SAT cells and ABCs in the kidneys arose from both local differentiation and recruitment from the spleen. In the synovium of aged rheumatoid arthritis patients, T peripheral helper/T follicular helper cells and ABCs also expressed CD153 and CD30, respectively. Together, our data reveal a previously unappreciated function of CD153/CD30 signaling in TLT formation and propose targeting the CD153/CD30 signaling pathway as a therapeutic target for slowing kidney disease progression.

DOI： 10.1172/JCI146071

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CD153/CD30 signaling promotes age-dependent tertiary lymphoid tissue expansion and kidney injury

Journal of Clinical Investigation Vol. 132 ( 2 ) 2022.1

Language：English Publishing type：Research paper (scientific journal)

Enhancement of ethanol production and cell growth in budding yeast by direct irradiation of low-temperature plasma Reviewed International journal Open Access

Hiromasa Tanaka, Shogo Matsumura, Kenji Ishikawa, Hiroshi Hashizume, Masafumi Ito, Kae Nakamura, Hiroaki Kajiyama, Fumitaka Kikkawa, Mikako Ito, Kinji Ohno, Yasumasa Okazaki, Shinya Toyokuni, Masaaki Mizuno, Masaru Hori

Japanese Journal of Applied Physics Vol. 61 ( SA ) 2022.1

Language：English Publishing type：Research paper (scientific journal)

Ethanol production by budding yeast was compared between direct and indirect plasma irradiation. We observed enhancement of ethanol production and cell growth not by indirect plasma irradiation but by direct plasma irradiation. Glucose consumption was increased in budding yeast by direct plasma irradiation. Extracellular flux analysis revealed that glycolytic activity in the budding yeast was elevated by direct plasma irradiation. These results suggest that direct plasma irradiation enhances ethanol production in budding yeast by elevating the glycolytic activity.

DOI： 10.35848/1347-4065/ac2037

Ferroptosis resistance determines high susceptibility of murine A/J strain to iron-induced renal carcinogenesis. Reviewed International journal Open Access

Zhen Cheng, Shinya Akatsuka, Guang Hua Li, Kiyoshi Mori, Takashi Takahashi, Shinya Toyokuni

Cancer science Vol. 113 ( 1 ) page： 65 - 78 2022.1

Language：English Publishing type：Research paper (scientific journal)

Cancer susceptibility is a critical factor in the understanding of carcinogenesis. Intraperitoneal (i.p.) injection of an iron chelate, ferric nitrilotriacetate (Fe-NTA), produces hydroxyl radicals via Fenton reaction to induce ferroptosis in renal proximal tubules. Rats or mice subjected to repeated i.p. injections of Fe-NTA develop renal cell carcinoma (RCC). To elucidate the molecular mechanisms that cause susceptibility to renal carcinogenesis, we first established an inter-strain difference in the susceptibility to Fe-NTA-induced renal carcinogenesis in mice. Based on a previous observation of a low incidence of RCC with this model in C57BL/6J strain mice, we investigated A/J strain mice here, which demonstrated significantly higher susceptibility to Fe-NTA-induced renal carcinogenesis. Homozygous deletion of the Cdkn2a/2b tumor suppressor locus was detected for the first time in A/J strain mice. Focusing on ferroptosis and iron metabolism, we explored the mechanisms involved that lead to the difference in RCC development. We compared the protective responses in the kidney of A/J and C57BL/6J strains after Fe-NTA treatment. After 3-week Fe-NTA treatment, A/J mice maintained higher levels of expression of glutathione peroxidase 4 and xCT (SLC7A11), leading to a lower level of lipid peroxidation. Simultaneously, A/J mice had decreased expression of transferrin receptor and increased expression of ferritin to greater degrees than C57BL/6 mice. After a single Fe-NTA injection, higher levels of oxidative cell damage and cytosolic catalytic Fe(II) were observed in C57BL/6J mice, accompanied by a greater increase in lipocalin-2. Lipocalin-2 deficiency significantly decreased oxidative renal damage. Our results suggest that a genetic trait favoring ferroptosis resistance contributes to high susceptibility to Fe-NTA-induced RCC in A/J strain.

DOI： 10.1111/cas.15175

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Papers - TOYOKUNI Shinya