Jun-ichiro Jo

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It is expected that mesenchymal stem cells (MSCs) will be a cell source for cardiac reconstruction because of their differentiation potential and ability to supply growth factors. However, poor viability at the transplanted site often hinders the therapeutic potential of MSCs. Here, in a trial designed to address this problem, a non-viral carrier of(More)
The recent rapid progress of molecular biology together with the steady progress of genome projects has given us some essential and revolutionary information about DNA and RNA to elucidate various biological phenomena at a genetic level. Under these circumstances, the technology and methodology of gene transfection have become more and more important to(More)
Myelomeningocele (MMC) is a common and devastating malformation. Although fetal surgical closure may improve outcome, a less invasive approach that can be applied earlier in gestation is desirable. The objective of this study was to evaluate the therapeutic feasibility of a tissue engineering approach for prenatal coverage of MMC. A gelatin hydrogel(More)
Autoimmune alopecia (alopecia areata) is considered to be triggered by a collapse of immune privilege in hair follicles. Here we confirmed that infiltrating CD4 T lymphocytes around hair follicles of patients with alopecia areata were primarily CCR5-positive with few CCR4-positive cells, suggesting a dominant role of Th1 cells in the alopecic lesion. Given(More)
Myelomeningocele (MMC) is a common and devastating malformation. As an alternative to fetal surgical repair, tissue engineering has the potential to provide a less invasive approach for tissue coverage applicable at an earlier stage of gestation. We have previously evaluated the use of gelatin hydrogel composites composed of gelatin sponges and sheets as a(More)
The objective of this study is to investigate the possibility of small interfering RNA (siRNA) complexed with a cationized dextran of nonviral carrier to biologically modify the adipogenesis extent of bone marrow-derived mesenchymal stem cells (MSC). Spermine was chemically introduced to the hydroxyl groups of dextran to prepare the cationized dextran(More)
The objective of this study was to genetically engineer dendritic cells (DC) for biological activation and evaluate their anti-tumor activity in a tumor-bearing mouse model. Mouse DC were incubated on the surface of culture dishes which had been coated with the complexes of a cationized dextran and luciferase plasmid DNA complexes plus a cell adhesion(More)
A simple modification of a DNA aptamer with poly(ethylene glycol) (PEG) based on metal coordination was developed. N,N-bis(carboxymethyl)-L-lysine (NTA) of a metal chelate residue was chemically introduced to one terminus of PEG. The NTA-introduced PEG (PEG-NTA) chelated Cu(2+) ions form a Cu(2+)-chelated PEG (PEG-Cu). When PEG-Cu was mixed with a DNA(More)
A new non-viral method of gene transfection was designed to enhance the level of gene expression for rat mesenchymal stem cells (MSCs). Pullulan was cationized using chemical introduction of spermine to prepare cationized pullulan of non-viral carrier (spermine-pullulan). The spermine-pullulan was complexed with a plasmid deoxyribonucleic acid (DNA) of(More)
The objective of this study is to develop a sustained release system of small interfering RNA (siRNA) inside cells aiming at a prolonged time period of gene suppression. Gelatin aqueous solution containing luciferase siRNA was coacelvated by acetone addition, followed by the glutaraldehyde (GA) crosslinking of gelatin to prepare gelatin nanospheres(More)