Faculty Profiles - MATSUKAWA Akihiro

Papers - MATSUKAWA Akihiro

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Expression of SPRED2 in the lung adenocarcinoma. Reviewed International journal

Yoko Ota, Tong Gao, Masayoshi Fujisawa, I Wayan Sumardika, Masakiyo Sakaguchi, Shinichi Toyooka, Teizo Yoshimura, Akihiro Matsukawa

Pathology, research and practice 265 155721 - 155721 2024.11

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

SPRED2 (Sprouty-related, EVH1 domain-containing protein 2), a negative regulator of the ERK1/2 pathway, is downregulated in several cancers; however, the significance of SPRED2 expression in lung adenocarcinoma (LUAD) remains unclear. Here, we investigated the pathological expression of SPRED2 and its relationship with ERK1/2 activation (ERK1/2 phosphorylation), Ki67 index and clinicopathological features in 77 LUAD tissues from clinical patients. Immunohistochemically, SPRED2 expression was decreased in invasive adenocarcinoma (IA) compared to adenocarcinoma in situ (AIS). There was a negative correlation between SPRED2 expression and pERK1/2 levels and a positive correlation between SPRED2 expression and Ki67 index. In the database analysis, the survival probability was higher in patients with higher SPRED2 expression than in those with lower expression. In vitro, SPRED2 deletion increased cell proliferation, migration and invasion of three LUAD cell lines (A549:KRAS mutation, H1993:METamplification, and HCC4006:EGFR mutation), whereas SPRED2 overexpression decreased these responses. Thus, SPRED2 appears to be a regulator of LUAD progression and a potential target for the treatment of LUAD.

DOI： 10.1016/j.prp.2024.155721

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Loss of Nr4a1 ameliorates endothelial cell injury and vascular leakage in lung transplantation from circulatory-death donor. Reviewed International journal

Shinichi Kawana, Mikio Okazaki, Tomohisa Sakaue, Kohei Hashimoto, Kentaro Nakata, Haruki Choshi, Shin Tanaka, Kentaroh Miyoshi, Shinji Ohtani, Toshiaki Ohara, Seiichiro Sugimoto, Akihiro Matsukawa, Shinichi Toyooka

The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation 2024.10

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

BACKGROUND: Ischemia-reperfusion injury (IRI) stands as a major trigger for primary graft dysfunction (PGD) in lung transplantation (LTx). Especially in LTx from donation after cardiac death (DCD), effective control of IRI following warm ischemia (WIRI) is crucial to prevent PGD. This study aimed to identify the key factors affecting WIRI in LTx from DCD. METHODS: Previously reported RNA-sequencing dataset of lung WIRI was reanalyzed to identify nuclear receptor subfamily 4 group A member 1 (NR4A1) as the immediate early gene for WIRI. Dynamics of NR4A1 expression were verified using a mouse hilar clamp model. To investigate the role of NR4A1 in WIRI, a mouse model of LTx from DCD was established using Nr4a1 knockout (Nr4a1-/-) mice. RESULTS: NR4A1 was located around vascular cells, and its protein levels in the lungs increased rapidly and transiently during WIRI. LTｘ from Nr4a1-/- donors significantly improved pulmonary graft function compared to wild-type donors (P < 0.001). Histological analysis showed decreased microvascular endothelial cell death (P = 0.007), neutrophil infiltration (P < 0.001), and albumin leakage (P < 0.001). Evans blue permeability assay demonstrated maintained pulmonary microvascular barrier integrity in grafts from Nr4a1-/- donors, correlating with diminished pulmonary edema (P < 0.001). However, NR4A1 did not significantly affect the inflammatory response during WIRI, and IRI was not suppressed when a wild-type donor lung was transplanted into the Nr4a1-/- recipient. CONCLUSIONS: Donor NR4A1 plays a specialized role in the positive regulation of endothelial cell injury and microvascular hyperpermeability. These findings demonstrate the potential of targeting NR4A1 interventions to alleviate PGD and improve outcomes in LTx from DCD.

DOI： 10.1016/j.healun.2024.09.028

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AIを用いた組織圧切片厚の推定法の開発とAI病理診断への応用

大原利章, 樋口拓浩, 藤澤真義, 松川昭博

日本癌治療学会学術集会抄録集 62回 O75 - 2 2024.10

HIF-PHD阻害薬による偽性低酸素はMSS大腸癌の充腫瘍免疫応答を増強する(Pseudohypoxia by HIF-PHD inhibitors activates tumor immune response for MSS colorectal cancer)

大原利章, 陳悦華, 濱田祐輔, 賀島肇, 菊地覚次, 野間和広, 田澤大, 藤澤真義, 藤原俊義, 松川昭博

日本癌学会総会記事 83回 E - 2017 2024.9

Exosomal delivery of miR-200b-3p suppresses the growth of hepatocellular carcinoma cells by targeting ERG- and VEGF-mediated angiogenesis. Reviewed International journal

Yuze Wang, Aye Moh-Moh-Aung, Tianyi Wang, Masayoshi Fujisawa, Toshiaki Ohara, Ken-Ichi Yamamoto, Masakiyo Sakaguchi, Teizo Yoshimura, Akihiro Matsukawa

Gene 148874 - 148874 2024.8

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

Hepatocellular carcinoma (HCC) remains a lethal malignancy with limited treatment options. Recent discoveries have highlighted the pivotal role of miRNAs in HCC progression. We previously reported that the expression of miR-200b-3p was decreased in HCC cells and exosomal miR-200b-3p from hepatocytes inhibited angiogenesis by suppressing the expression of the endothelial transcription factor ERG (erythroblast transformation-specific (ETS)-related gene), leading to the hypothesis that the delivery of this miRNA may inhibit angiogenesis and suppress HCC growth in vivo. Here, we tested this hypothesis by using human HCC inoculation models. First, we transfected the human HepG2 HCC cells and established a stable cell line that overexpressed a high level of miR-200b-3p. When miR-200b-3p-overexpressing cells were injected into severe combined immunedeficiency (SCID)-beige mice, tumor growth was significantly reduced compared to tumors of control cells, with a reduction in the expression of ERG and vascular endothelial growth factor (VEGF) and subsequent angiogenesis. Intra-tumoral injection of exosomes containing high levels of miR-200b-3p also reduced the growth of parental HepG2 tumors with reduced ERG and VEGF expression and angiogenesis. These results validate the inhibitory role of miR-200b-3p in tumor angiogenesis, thereby suppressing HCC tumor growth, and provide a novel insight into its potential therapeutic application.

DOI： 10.1016/j.gene.2024.148874

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日本における医学生の情報リテラシー能力の検討

三好智子, 小崎吉訓, 越智可奈子, 松川昭博

医学教育 55 ( Suppl. ) 351 - 351 2024.7

SPRED2 Is a Novel Regulator of Autophagy in Hepatocellular Carcinoma Cells and Normal Hepatocytes. Reviewed International journal

Tianyi Wang, Tong Gao, Masayoshi Fujisawa, Toshiaki Ohara, Masakiyo Sakaguchi, Teizo Yoshimura, Akihiro Matsukawa

International journal of molecular sciences 25 ( 11 ) 2024.6

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

Sprouty-related enabled/vasodilator-stimulated phosphoprotein homology 1 domain containing 2 (SPRED2) is an inhibitor of the mitogen-activated protein kinase (MAPK)/extracellular signal-regulated kinase (ERK) pathway and has been shown to promote autophagy in several cancers. Here, we aimed to determine whether SPRED2 plays a role in autophagy in hepatocellular carcinoma (HCC) cells. The Cancer Genome Atlas (TCGA) Liver Cancer Database showed a negative association between the level of SPRED2 and p62, a ubiquitin-binding scaffold protein that accumulates when autophagy is inhibited. Immunohistochemically, accumulation of p62 was detected in human HCC tissues with low SPRED2 expression. Overexpression of SPRED2 in HCC cells increased the number of autophagosomes and autophagic vacuoles containing damaged mitochondria, decreased p62 levels, and increased levels of light-chain-3 (LC3)-II, an autophagy marker. In contrast, SPRED2 deficiency increased p62 levels and decreased LC3-II levels. SPRED2 expression levels were negatively correlated with translocase of outer mitochondrial membrane 20 (TOM20) expression levels, suggesting its role in mitophagy. Mechanistically, SPRED2 overexpression reduced ERK activation followed by the mechanistic or mammalian target of rapamycin complex 1 (mTORC1)-mediated signaling pathway, and SPRED2 deficiency showed the opposite pattern. Finally, hepatic autophagy was impaired in the liver of SPRED2-deficient mice with hepatic lipid droplet accumulation in response to starvation. These results indicate that SPRED2 is a critical regulator of autophagy not only in HCC cells, but also in hepatocytes, and thus the manipulation of this process may provide new insights into liver pathology.

DOI： 10.3390/ijms25116269

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Innovative submucosal injection solution for endoscopic resection with phosphorylated pullulan: a preclinical study. Reviewed International journal

Takuya Satomi, Yukari Ochi, Takumi Okihara, Hiroki Fujii, Yasuhiro Yoshida, Katsumi Mominoki, Haruko Hirayama, Junki Toyosawa, Yasushi Yamasaki, Seiji Kawano, Yoshiro Kawahara, Hiroyuki Okada, Motoyuki Otsuka, Akihiro Matsukawa

Gastrointestinal endoscopy 99 ( 6 ) 1039 - 1047 2024.6

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

BACKGROUND AND AIMS: A submucosal injection solution is used to assist in endoscopic surgery. The high viscosity of current solutions makes them difficult to inject. In the present study, we developed an extremely low-viscosity, easy-to-use submucosal injection solution using phosphorylated pullulan (PPL). METHODS: The PPL solutions were prepared at different concentrations, and their viscosities were measured. The mucosal elevation capacity was evaluated using excised porcine stomachs. Controls included 0.4% sodium hyaluronate (SH), 0.6% sodium alginate (SA), and saline. To evaluate the practicality, the catheter injectability of 0.7% PPL was measured, and EMR and endoscopic submucosal dissection (ESD) were performed using the stomach and colorectum of live pigs. As controls, 0.4% SH and saline were used. RESULTS: The PPL solutions were of extremely low viscosity compared to the solutions of 0.4% SH and 0.6% SA. Nevertheless, the mucosal elevation capacity of PPL solutions for up to 0.7% concentration was similar to that of 0.4% SH, and 0.7% PPL was less resistant to catheter infusion than 0.4% SH and 0.6% SA. In live pig experiments with endoscopic mucosal resection and ESD, snaring after submucosal injection of 0.7% PPL was easier than with 0.4% SH, ESD with 0.7% PPL produced less bubble formation than with 0.4% SH, and the procedure time tended to be shorter with 0.7% PPL than with 0.4% SH because of the shorter injection time. CONCLUSIONS: The PPL solution is an innovative and easy-to-use submucosal injection solution.

DOI： 10.1016/j.gie.2024.01.015

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The specific shapes of capillaries are associated with worse prognosis in patients with invasive breast cancer. Reviewed International journal

Hnin-Wint-Wint Swe, Masayoshi Fujisawa, Toshiaki Ohara, Yu Komatsubara, Teizo Yoshimura, Tadahiko Shien, Akihiro Matsukawa

Pathology international 2024.5

Authorship：Last author Language：English Publishing type：Research paper (scientific journal)

Angiogenesis is considered essential for tumor progression; however, whether histological counting of blood vessel numbers, expressed as microvessel density (MVD), can be a prognostic factor in breast cancer remains controversial. It has been suggested that the specific morphology of blood vessels such as glomeruloid microvascular proliferation (GMP) is associated with clinical parameters. Here, we aimed to clarify the significance of MVD with revised immunohistochemistry and to identify new blood vessel shapes that predict prognosis in breast cancer. Four hundred and eleven primary breast cancer specimens were collected, and the sections were immunohistochemically stained with CD31 (single staining) and CD31 and Collagen IV (double staining). The prognosis of patients was examined based on the MVD value, and the presence of GMP and other blood vessels with other specific shapes. As a result, high MVD value and the presence of GMP were not associated with worse prognosis. By contrast, patients with deep-curved capillaries surrounding tumor cell nests (C-shaped) or excessively branched capillaries near tumor cell nests showed a significantly poor prognosis. The presence of these capillaries was also correlated with clinicopathological parameters such as Ki-67 index. Thus, the morphology of capillaries rather than MVD can be a better indicator of tumor aggressiveness.

DOI： 10.1111/pin.13442

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An osteoinductive surface by adhesive bone morphogenetic protein-2 prepared using the bioorthogonal approach for tight binding of titanium with bone. Reviewed International journal

Xueli Ren, Hironori Tsuji, Takahiko Uchino, Izumi Kono, Takashi Isoshima, Akimitsu Okamoto, Noriyuki Nagaoka, Toshifumi Ozaki, Akihiro Matsukawa, Hideyuki Miyatake, Yoshihiro Ito

Journal of materials chemistry. B 12 ( 12 ) 3006 - 3014 2024.3

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

Inorganic biomaterials are used in various orthopedic and dental implants. Nevertheless, they cause clinical issues such as loosening of implants and patient morbidity. Therefore, inspired by mussel adhesive proteins, we aimed to design an adhesive and dimer-forming highly active bone morphogenetic protein-2 (BMP-2) using bioorthogonal chemistry, in which recombinant DNA technology was combined with enzymatic modifications, to achieve long-term osseointegration with titanium. The prepared BMP-2 exhibited substantially higher binding activity than wild-type BMP-2, while the adhered BMP-2 was more active than soluble BMP-2. Therefore, the adhesive BMP-2 was immobilized onto titanium wires and screws and implanted into rat bones, and long-term osteogenesis was evaluated. Adhesive BMP-2 promoted the mechanical binding of titanium to bones, enabling efficient bone regeneration and effective stabilization of implants. Thus, such adhesive biosignaling proteins can be used in regenerative medicine.

DOI： 10.1039/d3tb02838k

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Role of Macrophages in Liver Fibrosis Invited Reviewed

Sun C, Matsukawa A

Acta Med Okayama 78 ( 1 ) 1 - 8 2024.2

Influence of the coronavirus disease 2019 pandemic on the post-graduate career paths of medical students: a cross-sectional study Reviewed

Ayumu Nishimura, Tomoko Miyoshi, Fumio Otsuka, Akihiro Matsukawa

BMC Medical Education 24 ( 1 ) 55 2024.1

Authorship：Last author Publisher：Springer Science and Business Media LLC

Abstract

Background

The World Health Organization first declared the coronavirus disease 2019 (COVID-19) pandemic in March 2020 and announced the end of the emergency in May 2023. Additionally, the COVID-19 pandemic significantly impacted individuals globally, including medical students. Although the COVID-19 pandemic increased online education, it restricted clinical training, extracurricular activities, and interprovincial travel. Therefore, this study aimed to examine whether the COVID-19 pandemic influenced the choice of training hospitals and career paths among 3rd- to 6th-year medical students in Japan.

Methods

We developed a questionnaire comprising 21 multiple-choice and 1 open-ended questions, which was administered anonymously via online platforms. The survey targeted Japanese medical students to obtain insights into their preferences for training hospitals and career paths during the COVID-19 pandemic. Participants included 4th- to 6th-year medical students from 51 medical schools in Japan. The survey was conducted through student networks from 8 February 2022 to 20 March 2022.

Results

Overall, 507 medical students participated in the survey, with representation from various academic years as follows: 102 (20.1%), 134 (26.4%), 121 (23.9%), and 150 (29.6%) students from the 3rd, 4th, 5th, and 6th year, respectively. Of these, 338 (66.6%) students reported that the COVID-19 pandemic had influenced their choice of training hospitals. The degree of the influence varied based on the university region and the student year. However, most of the students (473, 93.3%) did not change their course for clinical, basic research, or administrative pathways due to the COVID-19 pandemic. Among the clinically oriented students, 391 (77.2%) did not change their preferred speciality.

Conclusions

The COVID-19 pandemic influenced medical students’ choice of training hospitals. Although many students believed that the pandemic would not change their career choices, our results indicate a potential subconscious trend to avoid internal medicine, which is the speciality most directly involved in treating patients with COVID-19.

DOI： 10.1186/s12909-023-05021-6

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Other Link： https://link.springer.com/article/10.1186/s12909-023-05021-6/fulltext.html

【COVID-19パンデミック後の医学・医療者教育】ジグソー法とピア評価を取り入れたポストコロナ時代の行動科学社会の中でのコミュニケーション実践と振り返り能力育成プログラム

三好智子, 小崎吉訓, 越智可奈子, 松川昭博

医学教育 54 ( 6 ) 613 - 615 2023.12

In vivo lung perfusion for prompt recovery from primary graft dysfunction after lung transplantation. Reviewed International journal

Kei Matsubara, Kentaroh Miyoshi, Shinichi Kawana, Yujiro Kubo, Dai Shimizu, Yasuaki Tomioka, Toshio Shiotani, Haruchika Yamamoto, Shin Tanaka, Takeshi Kurosaki, Toshiaki Ohara, Mikio Okazaki, Seiichiro Sugimoto, Akihiro Matsukawa, Shinichi Toyooka

The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation 2023.10

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

BACKGROUND: No proven treatment after the development of primary graft dysfunction (PGD) is currently available. Here we established a novel strategy of in vivo lung perfusion (IVLP) for the treatment of PGD. IVLP involves the application of an in vivo isolated perfusion circuit to an implanted lung. This study aimed to explore the effectiveness of IVLP versus conventional post-lung transplant (LTx) extracorporeal membrane oxygenation (ECMO) treatment using an experimental swine LTx PGD model. METHODS: After 1.5-h warm ischemia of the donor lungs, a left LTx was performed. Following the confirmation of PGD development, pigs were divided into three groups (n = 5 each): control (no intervention), ECMO, and IVLP. After 2 h of treatment, a 4-h functional assessment was conducted and samples obtained. RESULTS: Significantly better oxygenation were achieved in the IVLP group (p ≤ 0.001). Recovery was confirmed immediately and maintained during the following 4-h observation. The IVLP group also demonstrated better lung compliance than the control group (p = 0.045). A histological evaluation showed that the lung injury score and terminal deoxynucleotidyl transferase dUTP nick end labeling assay showed significantly fewer injuries and a better result in the wet-to-dry weight ratio in the IVLP group. CONCLUSIONS: A two-hour IVLP is technically feasible and allows for prompt recovery from PGD after LTx. The posttransplant short-duration IVLP strategy can complement or overcome the limitations of the current practice for donor assessment and PGD management.

DOI： 10.1016/j.healun.2023.10.011

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The chemokine monocyte chemoattractant protein-1/CCL2 is a promoter of breast cancer metastasis. Invited Reviewed International journal

Teizo Yoshimura, Chunning Li, Yuze Wang, Akihiro Matsukawa

Cellular & molecular immunology 20 ( 7 ) 714 - 738 2023.7

Authorship：Last author Language：English Publishing type：Research paper (scientific journal)

Breast cancer is the most prevalent cancer worldwide, and metastasis is the leading cause of death in cancer patients. Human monocyte chemoattractant protein-1 (MCP-1/CCL2) was isolated from the culture supernatants of not only mitogen-activated peripheral blood mononuclear leukocytes but also malignant glioma cells based on its in vitro chemotactic activity toward human monocytes. MCP-1 was subsequently found to be identical to a previously described tumor cell-derived chemotactic factor thought to be responsible for the accumulation of tumor-associated macrophages (TAMs), and it became a candidate target of clinical intervention; however, the role of TAMs in cancer development was still controversial at the time of the discovery of MCP-1. The in vivo role of MCP-1 in cancer progression was first evaluated by examining human cancer tissues, including breast cancers. Positive correlations between the level of MCP-1 production in tumors and the degree of TAM infiltration and cancer progression were established. The contribution of MCP-1 to the growth of primary tumors and metastasis to the lung, bone, and brain was examined in mouse breast cancer models. The results of these studies strongly suggested that MCP-1 is a promoter of breast cancer metastasis to the lung and brain but not bone. Potential mechanisms of MCP-1 production in the breast cancer microenvironment have also been reported. In the present manuscript, we review studies in which the role of MCP-1 in breast cancer development and progression and the mechanisms of its production were examined and attempt to draw a consensus and discuss the potential use of MCP-1 as a biomarker for diagnosis.

DOI： 10.1038/s41423-023-01013-0

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医学生は、学内演習でもコミュニケーションにおける成長を自覚するのかコロナ禍での挑戦

三好智子, 川端崇義, 猪田宏美, 小崎吉訓, 越智可奈子, 赤穂宗一郎, 座間味義人, 伊野英男, 成瀬恵治, 松川昭博

医学教育 54 ( Suppl. ) 285 - 285 2023.7

SPRED2: A Novel Regulator of Epithelial-Mesenchymal Transition and Stemness in Hepatocellular Carcinoma Cells. Reviewed International journal

Tong Gao, Xu Yang, Masayoshi Fujisawa, Toshiaki Ohara, Tianyi Wang, Nahoko Tomonobu, Masakiyo Sakaguchi, Teizo Yoshimura, Akihiro Matsukawa

International journal of molecular sciences 24 ( 5 ) 2023.3

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

The downregulation of SPRED2, a negative regulator of the ERK1/2 pathway, was previously detected in human cancers; however, the biological consequence remains unknown. Here, we investigated the effects of SPRED2 loss on hepatocellular carcinoma (HCC) cell function. Human HCC cell lines, expressing various levels of SPRED2 and SPRED2 knockdown, increased ERK1/2 activation. SPRED2-knockout (KO)-HepG2 cells displayed an elongated spindle shape with increased cell migration/invasion and cadherin switching, with features of epithelial-mesenchymal transition (EMT). SPRED2-KO cells demonstrated a higher ability to form spheres and colonies, expressed higher levels of stemness markers and were more resistant to cisplatin. Interestingly, SPRED2-KO cells also expressed higher levels of the stem cell surface markers CD44 and CD90. When CD44+CD90+ and CD44-CD90- populations from WT cells were analyzed, a lower level of SPRED2 and higher levels of stem cell markers were detected in CD44+CD90+ cells. Further, endogenous SPRED2 expression decreased when WT cells were cultured in 3D, but was restored in 2D culture. Finally, the levels of SPRED2 in clinical HCC tissues were significantly lower than those in adjacent non-HCC tissues and were negatively associated with progression-free survival. Thus, the downregulation of SPRED2 in HCC promotes EMT and stemness through the activation of the ERK1/2 pathway, and leads to more malignant phenotypes.

DOI： 10.3390/ijms24054996

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Acrylamide monomers in universal adhesives Reviewed

M. H. Ahmed, K. Yoshihara, N. Nagaoka, C. Yao, A. Matsukawa, Y. Yoshida, B. Van Meerbeek

Dental Materials 39 ( 3 ) 246 - 259 2023.3

Publishing type：Research paper (scientific journal)

Objectives: The mono-functional monomer 2-hydroxyethyl methacrylate (HEMA) is often added to universal adhesives (UAs) to improve surface wetting and prevent phase separation. Nevertheless, HEMA promotes water sorption and hydrolysis at adhesive interfaces, hereby affecting long-term bonding to dentin. This study investigated if two acrylamide monomers could replace HEMA in an UA formulation applied in etch-and-rinse (2E&R) and self-etch (1SE) bonding mode. Methods: Four experimental UAs were bonded to bur-cut dentin. In addition to 12 wt% 10-MDP, 25 wt% Bis-GMA and 10 wt% TEGDMA as common monomer composition, 20 %wt ethanol and 15 %wt water as solvent, and 3 wt% polymerization-related additives, the four formulations solely differed for either the acrylamide cross-linker monomer ‘FAM-201′ as TEGDMA alternative and HEMA replacement, the hydroxyethyl acrylamide monomer ‘HEAA’ as HEMA alternative, HEMA (‘HEMA+’), or extra TEGDMA in a HEMA-free control (‘HEMA-’), all added in a 15 wt% concentration. The split-tooth study design involved application in 2E&R mode on one tooth half versus 1SE mode on the corresponding half. Micro-tensile bond strength of half of the micro-specimens was measured upon 1-week distilled water storage (‘immediate’ 1w μTBS), with the other half measured after additional 6-month storage (‘aged’ 6 m μTBS). Statistics involved linear mixed-effects (LME) modelling (p < .05). Additionally, interfacial TEM characterization, thin-film (TF) XRD surface analysis, LogP determination, and a cytotoxicity assay were carried out. Results: FAM-201 revealed significantly higher μTBS than HEMA+ at 1w and 6 m when applied both in E&R and SE bonding modes. HEAA's μTBS was significantly lower than that of HEMA+ at 1w when applied in SE mode. TF-XRD and TEM revealed similar chemical and ultrastructural interfacial characterization, including stable 10-MDP_Ca salt nano-layering. FAM-201 was least cytotoxic and presented with an intermediary LogP, while HEAA presented with the highest LogP, indicating high hydrophilicity and water-sorption sensitivity. Significance: The acrylamide co-monomer FAM-201 could replace HEMA in an UA formulation, while HEAA not.

DOI： 10.1016/j.dental.2023.01.003

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Highly Metastatic Subpopulation of TNBC Cells Has Limited Iron Metabolism and Is a Target of Iron Chelators Reviewed

Yuze Wang, Toshiaki Ohara, Yuehua Chen, Yusuke Hamada, Chunning Li, Masayoshi Fujisawa, Teizo Yoshimura, Akihiro Matsukawa

Cancers 15 ( 2 ) 468 2023.1

Osteoblast Response of Additively Manufactured Zirconia and Alumina-Toughened Zirconia. Reviewed International journal

Hiroto Nakai, Masanao Inokoshi, Kosuke Nozaki, Kumiko Yoshihara, Akihiro Matsukawa, Noriyuki Nagaoka, Watcharapong Tonprasong, Shunsuke Minakuchi

Materials (Basel, Switzerland) 15 ( 23 ) 2022.12

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

Zirconia ceramics have been widely used in dentistry. Herein, we assess the surface morphology, surface texture, and osteoblast response of additively manufactured zirconia and alumina-toughened zirconia (ATZ) in comparison with titanium. The surface roughness, contact angle, and surface microstructure of titanium sandblasted with large-grit alumina and subsequently acid-etched using 18% HCl and 49% H2SO4 (SLA-titanium), uniaxially pressed zirconia (UP zirconia), additively manufactured zirconia (AM zirconia), and additively manufactured ATZ (AM ATZ) were investigated. Moreover, the cell viability, alkaline phosphatase (ALP) activity, and gene expression of type I collagen on these materials were evaluated. The data were statistically analyzed using one-way ANOVA with Tukey's post hoc test. SLA-titanium showed the highest surface roughness and contact angle. The other three materials showed comparable surface roughness and contact angles. Micro- and nanoroughness were observed on the surface of SLA-titanium. UP zirconia and AM zirconia had similar surface morphologies. The cell viability, ALP activity, and gene expression of type I collagen on AM zirconia were comparable to or better than those on SLA-titanium. Our results indicate that AM zirconia is a promising material for zirconia dental implants.

DOI： 10.3390/ma15238685

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