Toshiaki Tachibana

ORCID: 0000-0001-6293-9513
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Research Areas
  • Growth Hormone and Insulin-like Growth Factors
  • Adipose Tissue and Metabolism
  • Birth, Development, and Health
  • Cancer Cells and Metastasis
  • Pluripotent Stem Cells Research
  • Pancreatic function and diabetes
  • Mitochondrial Function and Pathology
  • Inclusion and Disability in Education and Sport
  • Cancer, Hypoxia, and Metabolism
  • Protein Kinase Regulation and GTPase Signaling
  • PI3K/AKT/mTOR signaling in cancer
  • Animal Behavior and Welfare Studies
  • Ovarian cancer diagnosis and treatment
  • Monoclonal and Polyclonal Antibodies Research
  • Liver physiology and pathology
  • Neuroendocrine Tumor Research Advances
  • HER2/EGFR in Cancer Research
  • Behavioral and Psychological Studies
  • Animal Nutrition and Physiology
  • Disability Rights and Representation
  • Animal Behavior and Reproduction
  • Molecular Biology Techniques and Applications
  • Stress Responses and Cortisol
  • Melanoma and MAPK Pathways
  • 3D Printing in Biomedical Research

Jikei University School of Medicine
2015-2024

Nippon Dental University Hospital
2013

The Jikei University Hospital
2010

Nihon University
2004

Aichi Human Service Center
2003-2004

Niigata University
2000-2003

Behavioral Pharma (United States)
2002

Aichi Developmental Disability Center
1984-2000

Kyoto University
1996

Tokyo Metropolitan Institute of Medical Science
1982-1985

Abstract To clarify the role of ghrelin in bone metabolism, we examined effect vitro and vivo. Ghrelin its receptor, GHS-R1a, were identified osteoblasts, promoted both proliferation differentiation. Furthermore, increased BMD rats. Our results show that directly affects formation. Introduction: is a gut peptide involved growth hormone (GH) secretion energy homeostasis. Recently, it has been reported adipocyte-derived leptin, which also regulates homeostasis opposes ghrelin's actions...

10.1359/jbmr.041237 article EN Journal of Bone and Mineral Research 2005-05-01

Elderly people insidiously manifest the symptoms of heart failure, such as dyspnea and/or physical disabilities in an age-dependent manner. Although previous studies suggested that oxidative stress plays a pathological role development no direct evidence has been documented so far. In order to investigate significance heart, we generated heart/muscle-specific manganese superoxide dismutase-deficient mice. The mutant mice developed progressive congestive failure with specific molecular...

10.1074/jbc.m602118200 article EN cc-by Journal of Biological Chemistry 2006-09-08

Animal fetuses may be used for the regeneration of human organs. We have previously generated a transgenic mouse model that allows diphtheria toxin (DT)-induced ablation Six2-positive nephron progenitor cells (NPCs). Elimination existing native host NPCs enables their replacement with donor NPCs, which can generate neo-nephrons. However, this system cannot applied to because DT induces apoptosis in cells. Therefore, present study presents using tamoxifen, does not affect Using system, we...

10.1016/j.celrep.2020.108130 article EN cc-by-nc-nd Cell Reports 2020-09-01

Atrophy or hypofunction of the salivary gland because aging disease causes hyposalivation and has an effect on quality life patients, for example not only dry mouth but deterioration in mastication/deglutition disorder status oral hygiene. Currently conducted therapies atrophy clinical practice are symptomatic treatments with drugs artificial saliva, therefore it is preferable to establish a radical therapy. At this time, as fundamental investigation, by co-culturing mouse early ES (mEES-6)...

10.1007/s13577-013-0061-z article EN cc-by Human Cell 2013-05-16

The effects of dexamethasone (DEX) on the onset GH expression in fetal rat pituitary gland were studied. Pregnant rats received oral administration DEX dissolved drinking water (25 mg/liter) for 40 h before killing days 16-19 pregnancy. number immunoreactive cells control fetus day 18 was very small, whereas it remarkably increased by to a compatible value obtained from fetuses 19. effect induction found be less potent 17 and not evident 16. population 19 doubled, they stained more intensely...

10.1210/endo.132.2.7678792 article EN Endocrinology 1993-02-01

Expression of human protein kinase C delta (PKCδ) has been linked to many types cancers. PKCδ is known be a multifunctional PKC family member and rigorously studied as an intracellular signaling molecule. Here we show that secretory regulates cell growth liver cancer. Full-length was secreted the extracellular space in living cancer cells under normal culture conditions xenograft mouse models. Patients with showed higher levels serum than patients chronic hepatitis or cirrhosis healthy...

10.1158/0008-5472.can-20-2009 article EN Cancer Research 2020-12-14

The regulation of growth hormone (GH) cell development by thyroid and glucocorticoid hormones in the fetal rat pituitary gland was examined. Dexamethasone (Dex) treatment dams induced GH mRNA accumulation on day 17 or 18 gestation when substantial expression has not yet occurred control fetus. additional thyroxine injections apparently enhanced effect Dex, whereas it exhibited no given alone. reduction level methimazole suppressed either Dex induction spontaneous onset 19 gestation. results...

10.1152/ajpendo.1995.268.2.e262 article EN AJP Endocrinology and Metabolism 1995-02-01

Abstract Background Biallelic CLN3 gene variants have been found in either juvenile‐onset neuronal ceroid lipofuscinosis (JNCL) or isolated retinal dystrophy. It has reported that most JNCL patients carry a common 1.02‐kb deletion variant homozygously. Clinical characteristics of with biallelic missense are not well elucidated. Methods We described 26‐year‐old Japanese male patient Whole‐exome sequencing (WES) and transmission electron microscopy (TEM) were performed. Results identified...

10.1002/mgg3.1308 article EN cc-by Molecular Genetics & Genomic Medicine 2020-05-22

Mucopolysaccharidosis type II is a disease caused by organ accumulation of glycosaminoglycans due to iduronate 2-sulfatase deficiency. This study investigated the pathophysiology bone complications associated with mucopolysaccharidosis and effect lentivirus-mediated gene therapy hematopoietic stem cells on lesions mouse models in comparison enzyme replacement therapy. Bone volume, density, strength, trabecular number were significantly higher untreated mice than wild-type mice. Accumulation...

10.1016/j.omtm.2020.09.012 article EN cc-by-nc-nd Molecular Therapy — Methods & Clinical Development 2020-09-20

Protein secretion in cancer cells defines tumor survival and progression by orchestrating the microenvironment. Studies suggest occurrence of active cytosolic proteins liver their involvement tumorigenesis. Here, we investigated identification extended-synaptotagmin 1 (E-Syt1), an endoplasmic reticulum (ER)-bound protein, as a key mediator for protein at ER-plasma membrane (PM) contact sites. Cytosolic interacted with E-Syt1 on ER, then localized spatially inside SEC22B+ vesicles cells....

10.1073/pnas.2202730119 article EN cc-by-nc-nd Proceedings of the National Academy of Sciences 2022-08-31

We found that treatment with thiamine can have a protective effect on myocardial ischemia. Thiamine likely mediates mitochondrial fission through the inhibition of DRP1 phosphorylation and preservation larger-sized mitochondria ATP concentration, leading to higher cardiac contractility performance during subsequent reperfusion state.

10.1152/japplphysiol.00578.2020 article EN Journal of Applied Physiology 2020-10-29

96 male rats were tested in open field dim-light condition or bright-light for 3 min. per day 5 days. The validity of 7 open-field test measures was assessed on the basis concept which defined operationally using situation as external criterion. Ambulation first 1 and rearing showed not only but also some generality. An interactive measure (ambulation defecation) proposed a new significant measure. Larger intercorrelations among obtained less stressful situation. In view results, an...

10.2466/pr0.1982.50.3.899 article EN Psychological Reports 1982-06-01

Loss of podocytes is a common feature diabetic renal injury and key contributor to the development albuminuria. We found that podocyte Rho associated coiled-coil containing protein kinase 2 (ROCK2) activated in rodent models patients with diabetes. Mice lacked ROCK2 only (PR2KO) were resistant albuminuria, glomerular fibrosis, loss multiple animal diabetes (i.e., streptozotocin injection, db/db, high-fat diet feeding). RNA-sequencing ROCK2-null provided initial evidence suggesting as...

10.1038/s42003-022-03300-4 article EN cc-by Communications Biology 2022-04-08

Increasing evidence suggests natriuretic peptides (NPs) coordinate interorgan metabolic crosstalk. We recently reported exogenous ANP treatment ameliorated systemic insulin resistance by inducing adipose tissue browning and attenuating hepatic steatosis in diet-induced obesity (DIO). herein investigated whether also ameliorates myocardial resistance, leading to cardioprotection during ischemia–reperfusion injury (IRI) DIO. Mice fed a high-fat diet (HFD) or normal-fat for 13 weeks were...

10.3390/ijms23158373 article EN International Journal of Molecular Sciences 2022-07-29
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