Publications by authors named "Yuko Ogawa"

The efficacy of hematopoietic stem cell (HSC) therapy for cerebral infarction has been previously demonstrated. However, the lack of response in some patients has hindered its widespread use. To establish HSC therapy as a standard treatment, it is important to examine the causes of non-responsiveness.

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Chimeric mice with humanized livers were used to evaluate drug-induced liver injury (DILI). However, lipid accumulation is observed in the human hepatocytes of chimeric mice because of human growth hormone deficiency (GHD), which is an obstacle in the evaluation of drug-induced fatty liver disease (DIFLD), a common type of DILI. Previously, we showed that lipid droplets were reduced by the administration of human growth hormone (h-GH) to chimeric mice.

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Article Synopsis
  • The study investigated the feasibility and effectiveness of a modified behavioral activation program aimed at helping individuals who have lost loved ones to cancer, specifically in reducing depressive symptoms.
  • The program included a series of pre-interviews and seven 50-minute sessions, with participants showing high completion rates of 95% for the intervention and 90% for follow-up.
  • Results indicated significant reductions in depression and anxiety symptoms, with large effect sizes measured three months post-intervention, suggesting that the program effectively supports bereaved individuals.
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Article Synopsis
  • Research shows that stem cell therapy relies on their ability to grow and differentiate, but the exact mechanisms behind their healing effects are unclear.
  • A study discovered that umbilical cord blood cells, even after being damaged by X-irradiation, can still promote recovery in a mouse stroke model by rapidly transferring small metabolites to help repair tissue.
  • These findings suggest that instead of relying solely on the growth of stem cells, the therapeutic benefits might come from stimulating new blood vessel and neuron formation through the metabolites released by X-irradiated cells.
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Extracellular vesicles (EVs), which are found in almost all cells and human body fluids, are currently being studied as a source of pathophysiological information. Previously, we demonstrated that at least two types of EVs can be isolated from human whole saliva (WS) using enzymatic activity of dipeptidyl peptidase IV (DPP IV) as a marker for differentiating the EV subsets. In the present study, EV fractions, termed EV-I 20 k-ppt and EV-II 100 k-ppt, were prepared by a combination of size-exclusion chromatography of improved condition and sequential centrifugation.

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Adolescent and young adult (AYA) patients with cancer have few opportunities to connect with patients of the same generation while hospitalized. Although anxiety is frequently reported by them, there are no reports on the psychological effectiveness of an in-hospital patient support program based on peer support. This study aimed to evaluate the effectiveness of a program, termed Adolescent and Young Adult Hiroba (AYA Hiroba), for anxiety in AYA patients with cancer.

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Background: Though the effectiveness of behavioral activation (BA) for patients with cancer and depression were reported, there is no evidence in Japan.

Objectives: This study aimed at examining the feasibility and preliminary effectiveness of BA for patients with cancer and depression in Japan.

Methods: This pre-post study without a control group was conducted in patients with cancer and depression in Japan.

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Postoperative delirium is an important issue in cancer patients, affecting surgical outcomes and the quality of life. Ramelteon is a melatonin receptor agonist with high affinity for MT1 and MT2 receptors. Clinical trials and observational studies in Japan, including in surgical cancer patients, have shown efficacy of ramelteon in delirium prevention, with no serious safety concerns.

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Background: Though behavioral activation (BA) has been shown to be effective for depression, evidence in patients with advanced cancer has not been established. This study aimed to examine the effectiveness of a BA program on depression in this population.

Methods: A randomized controlled trial with a wait-list control group (waiting group) of 38 patients with advanced cancer and depression will be conducted at three sites in Japan.

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Somatolactin alpha (SLα) is a fish-specific hormone involved in body color regulation. The growth hormone (GH) is another hormone that is expressed in all vertebrates and promotes growth. These peptide hormones act by binding to receptors (SLα receptor (SLR) and GH receptor (GHR)); however, the relationships between these ligands and their receptors vary among species.

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We have previously demonstrated that small molecular transfer, such as glucose, between hematopoietic stem cells (HSCs) or mesenchymal stem cells (MSCs) and vascular endothelial cells via gap junctions constitutes an important mechanism of stem cell therapy. Cell metabolites are high-potential small-molecule candidates that can be transferred to small molecules between stem cells and vascular endothelial cells. Here, we investigated the differences in metabolite levels between stem cells (HSCs and MSCs), vascular endothelial cells, and the levels of circulating non-hematopoietic white blood cells (WBCs).

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The effect of a surface pre-reacted glass ionomer (S-PRG)-containing sealant on the demineralization inhibition and remineralization of intact enamel adjacent to the sealant material was investigated. BeautiSealant (BTS, S-PRG sealant, Shofu), Teeth Mate F-12.0 (TMF, fluoride-releasing sealant, Kuraray Noritake Dental), and an experimental silica-filler sealant were investigated.

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This study was conducted to evaluate the safety and efficacy of human peripheral blood CD34 positive (CD34) cells transplanted into a murine chronic stroke model to obtain pre-clinical proof of concept, prior to clinical testing. Granulocyte colony stimulating factor (G-CSF) mobilized human CD34 cells [1 × 10 cells in 50 μl phosphate-buffered saline (PBS)] were intravenously (iv) or intra-carotid arterially (ia) transplanted 4 weeks after the induction of stroke (chronic stage), and neurological function was evaluated. In this study, severe combined immune deficiency (SCID) mice were used to prevent excessive immune response after cell therapy.

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Circulating white blood cells (WBC) contribute toward maintenance of cerebral metabolism and brain function. Recently, we showed that during aging, transcription of metabolism related genes, including energy source transports, in the brain significantly decreased at the hippocampus resulting in impaired neurological functions. In this article, we investigated the changes in RNA transcription of metabolism related genes (glucose transporter 1 [Glut1], Glut3, monocarboxylate transporter 4 [MCT4], hypoxia inducible factor 1-α [Hif1-α], prolyl hydroxylase 3 [PHD3] and pyruvate dehydrogenase kinase 1 [PDK1]) in circulating WBC and correlated these with brain function in mice.

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Adolescent and young adult (AYA) patients with cancer have few opportunities to interact with peers in their lives. To meet peers safely during the coronavirus disease 2019 (COVID-19) pandemic, a hospital-based online patients support program called Online AYA Hiroba was launched for AYA patients with cancer and held regularly by the National Cancer Center Hospital in Japan. This retrospective study suggested the degree of satisfaction with this program and issues about facilitating the sessions that are unique to the online environment.

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Article Synopsis
  • Nonalcoholic fatty liver disease (NAFLD) and its more severe form, steatohepatitis (NASH), are prevalent liver disorders in developed nations but have no approved drugs for treatment yet.
  • The study introduces a new model using human liver chimeric mice that mimics human NASH, overcoming challenges related to animal testing due to species differences.
  • The research successfully demonstrated that treating these chimeric mice with a drug called Elafibranor significantly improved liver damage, indicating this model could help discover new therapies and understand NASH better.
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Although adult patients with attention-deficit hyperactivity disorder (ADHD) and autism spectrum disorder (ASD) often have sleep problems, few studies have verified the effect of a psychological approach specific to sleep-wake rhythms on these sleep disturbances. Therefore, the aim of this pilot study was to develop a trans-diagnostic approach with sleep scheduling and regularity of sleep duration as core modules, and to examine the effect of the intervention in adult ADHD and/or ASD subjects with sleep disturbances. This was a within-group pilot study.

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Adolescent and young adult (AYA) cancer patients have few opportunities to interact with peers in the hospital. AYA Hiroba, a peer support system for AYA cancer patients, was launched and held regularly at the National Cancer Center Hospital in Japan. This questionnaire survey was conducted to investigate the degree of satisfaction and opinions of AYA cancer patients regarding this program.

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Objectives: Bone marrow mononuclear cells (BM-MNC) show a significant therapeutic effect in combination with training even in the chronic phase of stroke. However, the mechanism of this combination therapy has not been investigated. Here, we examined its effects on brain metabolism in chronic stroke mice.

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Background: Extracellular vesicles (EVs) have been isolated from various sources, including primary and cultured cell lines and body fluids. Previous studies, including those conducted in our laboratory, have reported the stability of EVs under various storage conditions.

Methods: EVs from human whole saliva were separated via size-exclusion chromatography.

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Objectives: To synthesize the literature describing quality improvement in PICUs and to appraise the quality of extant research.

Data Sources: We searched the PubMed, Cumulative Index to Nursing and Allied Health Literature, and the Cochrane Central Register of Controlled Trials databases between May and June 2020.

Study Selection: Peer-reviewed articles in English that report quality improvement interventions in PICUs were included.

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We have shown previously that transplanted bone marrow mononuclear cells (BM-MNC), which are a cell fraction rich in hematopoietic stem cells, can activate cerebral endothelial cells via gap junction-mediated cell-cell interaction. In the present study, we investigated such cell-cell interaction between mesenchymal stem cells (MSC) and cerebral endothelial cells. In contrast to BM-MNC, for MSC we observed suppression of vascular endothelial growth factor uptake into endothelial cells and transfer of glucose from endothelial cells to MSC in vitro.

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Objective: This study sought to validate the Japanese version of the Sleep Hygiene Practices Scale (SHPS-J).

Patients/methods: A cross-sectional questionnaire-based study was conducted via the internet. In total, 854 participants (435 men, 419 women; mean age, 42.

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Objectives: To retrospectively evaluate whether the early dark cortical band (EDCB) on CT can be a predictor to differentiate clear cell renal cell carcinoma (ccRCC) from fat poor angiomyolipoma (Fp-AML) and to detect peritumoral pseudocapsules in ccRCC.

Methods: The EDCBs, which are comprised of unenhanced thin lines at the tumor-renal cortex border in the corticomedullary phase, on the CT images of 342 patients who underwent partial nephrectomy were evaluated. Independent predictors among the clinical and CT findings for differentiating ccRCC from Fp-AML were identified using multivariate analyses.

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Acute distress immediately following an F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) scan is an exceedingly rare event. We report a case whose condition was suddenly deteriorated in the nuclear medicine laboratory, and whose diagnosis was confirmed by FDG-PET/CT. A 67-year-old woman with left renal cell carcinoma (RCC) suddenly complained of dyspnea and tachycardia just after undergoing FDG-PET/CT.

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