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Cell Medicine

Marie-José Lecomte, Séverine Pechberty, Cécile Machado, Sandra Da Barroca, Philippe Ravassard, Raphaël Scharfmann, Paul Czernichow, Bertrand Duvillié
Innovative treatments to cure type 1 diabetes are being actively researched. Among the different strategies, the replacement of β-cells has given promising results. Classically, islets from cadaveric donors are transplanted into diabetic patients, but recently phase I clinical trials that use stem cell-derived β-cells have been started. Such protocols require either an immunosuppressive treatment or the macroencapsulation of the β-cells. They involve cell aggregation and the exposure of the cells to hypoxia...
December 3, 2016: Cell Medicine
A Grognuz, C Scaletta, A Farron, D P Pioletti, W Raffoul, L A Applegate
Tendon afflictions are very common, and their negative impact is high both at the workplace and in leisure activities. Tendinopathies are increasing in prevalence and can lead to tendon ruptures, where healing is a long process with outcomes that are often disappointing. Human fetal progenitor tenocytes (hFPTs) have been recently tested in vitro as a potential cell source to stimulate tendon regeneration. The aim of the present study was to compare different commercial hyaluronic acid (HA) gels, which could be used to resuspend hFPTs in a formulation that would allow for good delivery of the cells...
December 3, 2016: Cell Medicine
Irina Aizman, William S Holland, Cher Yang, Damien Bates
Clinical applications of mesenchymal stromal cells (MSCs) require the manufacture of large cell lots, which involves multiple passages for cell expansion and sometimes genetic modification. MSCs from various sources, including bone marrow (BM), exhibit high donor-to-donor variability in their growth characteristics. This can lead to unpredictable manufacturing outcomes with respect to success or failure of individual lots. Early determination of lot success has the potential to reduce the cost and improve the efficiency of the MSC manufacturing process...
December 3, 2016: Cell Medicine
Maura K W Bittencourt, Michele A Barros, João Flávio P Martins, Jose Paulo C Vasconcellos, Bruna P Morais, Celine Pompeia, Matheus Domingues Bittencourt, Karine Dos Santos Evangelho, Irina Kerkis, Cristiane V Wenceslau
Keratoconjunctivitis sicca (KCS) is a dysfunction in tear production associated with clinical signs, which include conjunctival hyperemia, ocular discharge, discomfort, pain, and, eventually, corneal vascularization and pigmentation. Immunosuppressive drugs are routinely administrated for long periods to treat KCS but with side effects and limited results. Evaluation of the clinical benefits of intralacrimal transplantation of allogeneic mesenchymal stem cells (MSCs) in dogs with mild-moderate and severe KCS was done...
December 3, 2016: Cell Medicine
Sreenadh Sasidharan Pillai, Hiroshi Yukawa, Daisuke Onoshima, Vasudevanpillai Biju, Yoshinobu Baba
Quantum dots (QDs) have recently been investigated as fluorescent probes for detecting a very small number of biomolecules and live cells; however, the establishment of molecular imaging technology with on-off control of QD fluorescence remains to be established. Here we have achieved the fluorescence off state of QDs with the conjugation of black hole quencher (BHQ) molecules intermediated with peptide by using streptavidin-QDs585 and biotin-pep-BHQ-1. The fluorescence of streptavidin-QDs585 was decreased by the addition of biotin-pep-BHQ-1 in a dose-dependent manner...
December 17, 2015: Cell Medicine
Yoshitaka Miyamoto, Masashi Ikeuchi, Hirofumi Noguchi, Tohru Yagi, Shuji Hayashi
In drug discovery, it is very important to evaluate liver cells within an organism. Compared to 2D culture methods, the development of 3D culture techniques for liver cells has been successful in maintaining long-term liver functionality with the formation of a hepatic-specific structure. The key to performing drug testing is the establishment of a stable in vitro evaluation system. In this article, we report a Tapered Stencil for Cluster Culture (TASCL) device developed to create liver spheroids in vitro. The TASCL device will be applied as a toxicity evaluation system for drug discovery...
December 17, 2015: Cell Medicine
Shingo Yamashita, Kazuo Ohashi, Rie Utoh, Teruo Okano, Masakazu Yamamoto
Our experimental approach toward the development of new islet-based treatment for diabetes mellitus has been the creation of a monolayered islet cell construct (islet cell sheet), followed by its transplantation into a subcutaneous pocket. Previous studies describe rat laminin-5 (chain composition: α3, β3, γ2) as a suitable extracellular matrix (ECM) for surfaces comprised of a coated temperature-responsive polymer, poly(N-isopropylacrylamide) (PIPAAm). To progress toward the clinical application of this approach, the present study attempted to identify an optimal human ECM as a coating material on PIPAAm surfaces, which allowed islet cells to attach on the surfaces and subsequently to be harvested as a monolithic cell sheet...
December 17, 2015: Cell Medicine
Hiroyuki Hanayama, Kazuo Ohashi, Rie Utoh, Hirofumi Shimizu, Kazuya Ise, Fuminori Sakurai, Hiroyuki Mizuguchi, Hiroyuki Tsuchiya, Teruo Okano, Mitsukazu Gotoh
To establish novel islet-based therapies, our group has recently developed technologies for creating functional neo-islet tissues in the subcutaneous space by transplanting monolithic sheets of dispersed islet cells (islet cell sheets). Improving cellular function and viability are the next important challenges for enhancing the therapeutic effects. This article describes the adenoviral vector-mediated gene transduction of dispersed islet cells under culture conditions. Purified pancreatic islets were obtained from Lewis rats and dissociated into single islet cells...
December 17, 2015: Cell Medicine
Hirofumi Noguchi, Chika Miyagi-Shiohira, Kiyoto Kurima, Naoya Kobayashi, Issei Saitoh, Masami Watanabe, Yasufumi Noguchi, Masayuki Matsushita
Although islet culture prior to transplantation provides flexibility for the evaluation of isolated islets and the pretreatment of patients, it is well known that isolated islets deteriorate rapidly in culture. Human serum albumin (HSA) is used for medium supplementation instead of fetal bovine serum (FBS), which is typically used for islet culture research, to avoid the introduction of xenogeneic materials. However, FBS contains several factors that are beneficial to islet viability and which also neutralize the endogenous pancreatic enzymes or exogenous enzymes left over from the isolation process...
December 17, 2015: Cell Medicine
Issei Saitoh, Emi Inada, Yoko Iwase, Hirofumi Noguchi, Tomoya Murakami, Miki Soda, Naoko Kubota, Hiroko Hasegawa, Eri Akasaka, Yuko Matsumoto, Kyoko Oka, Youichi Yamasaki, Haruaki Hayasaki, Masahiro Sato
Feeder cells are generally required to maintain embryonic stem cells (ESCs)/induced pluripotent stem cells (iPSCs). Mouse embryonic fibroblasts (MEFs) isolated from fetuses and STO mouse stromal cell line are the most widely used feeder cells. The aim of this study was to determine which cells are suitable for establishing iPSCs from human deciduous tooth dental pulp cells (HDDPCs). Primary cultures of HDDPCs were cotransfected with three plasmids containing human OCT3/4, SOX2/KLF4, or LMYC/LIN28 and pmaxGFP by using a novel electroporation method, and then cultured in an ESC qualified medium for 15 days...
December 17, 2015: Cell Medicine
Chika Miyagi-Shiohira, Kiyoto Kurima, Naoya Kobayashi, Issei Saitoh, Masami Watanabe, Yasufumi Noguchi, Masayuki Matsushita, Hirofumi Noguchi
Mesenchymal stem cells (MSCs) have the potential to differentiate into cells of mesodermal origin such as osteoblasts, adipocytes, myocytes, and chondrocytes. They possess an immunosuppressive effect, which makes them a viable cell population for the cell-based therapy of treatment-resistant immune diseases. Adipose-derived mesenchymal stem cells (ASCs) have been demonstrated to have the ability to acquire the properties of subcutaneous adipose tissue particularly easily, and cryopreservation is currently performed as a routine method for preserving ASCs to safely acquire large numbers of cells...
December 17, 2015: Cell Medicine
Hirofumi Noguchi
No abstract text is available yet for this article.
December 17, 2015: Cell Medicine
David J Eve
A wide variety of subjects are presented at the annual American Society of Neural Therapy and Repair meeting every year, as typified by this summary of the 2014 meeting. Parkinson's disease-related presentations were again the most popular topic, with traumatic brain injury, spinal cord injury, and stroke being close behind. Other disorders included Huntington's disease, brain cancer, and bipolar disorders. Several studies were related to multiple diseases, and many studies attempted to reveal more about the disease process...
October 1, 2015: Cell Medicine
Rika Nagasaki, Yoshiki Mukudai, Yasumasa Yoshizawa, Masahiro Nagasaki, Sunao Shiogama, Maiko Suzuki, Seiji Kondo, Satoru Shintani, Tatsuo Shirota
The osteogenic induction of adipose-derived stem cells (ADSCs) has been regarded as an important step in bone tissue engineering. In the present study, we focused on the buccal fat pad (BFP) as a source of adipose tissue, since BFPs are encapsulated by adipose tissue and are often coextirpated during oral surgery. Low-intensity pulsed ultrasound (LIPUS) is effective in the treatment of fractures, and nanohydroxyapatite (NHA) is known as a bone substitute material. Here we investigated the synergistic effects of LIPUS and NHA in the osteogenesis of ADSCs...
October 1, 2015: Cell Medicine
Micha Sam Brickman Raredon, Mahboobe Ghaedi, Elizabeth A Calle, Laura E Niklason
Respiratory epithelium is difficult to grow in vitro, as it requires a well-maintained polarizing air-liquid interface (ALI) to maintain differentiation. Traditional methods rely on permeable membrane culture inserts, which are difficult to work with and are ill-suited for the production of large numbers of cells, such as the quantities required for cell-based clinical therapies. Herein, we investigate an alternative form of culture in which the cells are placed on a porous substrate that is continuously rolled, such that the monolayer of cells is alternately submerged in media or apically exposed to air...
October 1, 2015: Cell Medicine
Michele A Barros, João Flávio Panattoni Martins, Durvanei Augusto Maria, Crisitiane Valverde Wenceslau, Dener Madeiro De Souza, Alexandre Kerkis, Niels Olsen S Câmara, Julio Cesar C Balieiro, Irina Kerkis
Acute renal failure (ARF) is a common renal disease that can lead to high mortality. Recovery from ARF occurs with the replacement of necrotic tubular cells by functional tubular epithelial cells and the normalization of microvascular endothelial cell function in the peritubular capillaries. Conventional therapeutic techniques are often ineffective against ARF. Hence, stem cell therapies, which act through multiple trophic and regenerative mechanisms, are encouraging. We investigated the homing of human immature dental pulp stem cells (IDPSCs) after endovenous (EV) or intraperitoneal (IP) injection, in immunocompetent Wistar rats with ARF induced by intramuscular injection of glycerol, without the use of immunosuppression...
October 1, 2015: Cell Medicine
Takako Tsugata, Naruo Nikoh, Tatsuya Kin, Issei Saitoh, Yasufumi Noguchi, Hideo Ueki, Masami Watanabe, Andrew M James Shapiro, Hirofumi Noguchi
The low efficiency of in vitro differentiation of human embryonic stem cells (ESCs) or human induced pluripotent stem cells (iPSCs) into insulin-producing cells thus creates a crucial hurdle for the clinical implementation of human pluripotent stem cells (PSCs). In this study, we investigated the key factors for the differentiation of PSCs into insulin-producing cells. We obtained microarray data of HUES8 and HUES6 from two GeneChips (GPL3921: Affymetrix HT Human Genome U133A Array, GPL570: Affymetrix Human Genome U133 Plus 2...
February 8, 2015: Cell Medicine
Hiroshi Yukawa, Masaki Watanabe, Noritada Kaji, Yoshinobu Baba
Quantum dots (QDs) are thought to be a novel inorganic probe for in vivo fluorescence imaging because of their excellent fluorescence properties. Autofluorescence is generally known to be produced from various living bodies including humans, rats, and mice. However, the influence of the autofluorescence on in vivo fluorescence imaging using QDs remains poorly understood. In this article, we assessed the autofluorescence derived from a mouse body and the influence of the autofluorescence on in vivo fluorescence imaging using QDs...
February 8, 2015: Cell Medicine
Yoshitaka Miyamoto, Masashi Ikeuchi, Hirofumi Noguchi, Tohru Yagi, Shuji Hayashi
Attempts to create artificial liver tissue from various cells have been reported as an alternative method for liver transplantation and pharmaceutical testing. In the construction of artificial liver tissue, the selection of the cell source is the most important factor. However, if an appropriate environment (in vitro/in vivo) cannot be provided for various cells, it is not possible to obtain artificial liver tissue with the desired function. Therefore, we focused on the in vitro environment and produced liver tissues using MEMS technology...
February 8, 2015: Cell Medicine
Sandi Sufiandi, Hiromichi Obara, Shin Enosawa, Huai-Che Hsu, Naoto Matsuno, Hiroshi Mizunuma
Improving cell viability and function are important for enhancing the clinical results of cell transplantation. The relationship between cell viability and shear stress remains unexplained, and sedimentation effects during the infusion process are important to the hepatocyte transplantation process. In the present study, the relationship between cell viability and shear stress in the presence of sedimentation effect was investigated using a microchannel simulating the cell transplantation process under several shear stress conditions...
February 8, 2015: Cell Medicine
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