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  • New Isolation Technique and Culture System for Clinical Applications of Human Amniotic Epithelial Stem Cells.

    요약 : 
    태반은 성체줄기세포의 보고이다. 특히 양막상피세포는 배아줄기세포의 줄기세포 능력을 나타내는 세포 표면표시자들을 그대로 발현하는 줄기세포로 알려져 있다. 하지만 상피세포를 실험실에서 지지세포 없이 대량 증식 배양하는 것은 상피세포가 가지고 있는 내인성 성격으로 인해 어렵다. 본 연구에서는 디티오트레이톨(Dithiothreitol; DTT)과 ROCK 저해제(Rho-associated kinase inhibitor)를 이용하여 양막상피세포를 분리하고 배양하는데 있어서 임상적용이 가능한 수준의 세포를 얻었고, 최적의 세포상태를 유지하였다. 본 연구에서 분리배양된 양막상피세포는 상피세포의 특성과 줄기세포의 특성을 발현하였다. 결론적으로 줄기세포 치료를 이용한 재생의학의 관점에서 인간태반 유래 양막상피줄기세포는 아무런 윤리적인 논란을 일으키지 않는 주요한 줄기세포 치료제의 재료로서 여러 가지 질병 치료에 사용될 수 있을 것이다.

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  • Mesenchymal stem cell transplantation can restore lupus disease-associated miRNA expression and Th1/Th2 ratios in a murine model of SLE

    Treatment with
    cyclophosphamide or ASC can change miRNAs and decrease miR-96-5p and miR-182-5p expression,
    as well as decreasing the CD138 proportion and the Th1/Th2 ratio, which might be involved in the
    therapeutic mechanism.

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  • Long-term Follow-up after Implantation of Autologous Adipose Tissue Derived Mesenchymal Stem Cells to Treat a Dog with Stifle Joint Osteoarthrosis

    요약 : 
    A 5-year-old castrated male Chihuahua weighing 1.54 kg was examined because of a several month history of progressive right hind limb lameness. Physical examination of the stifle joints revealed pain and a grade IV medial patellar luxation on the right stifle joint. The right and left stifle joints were associated with a lameness of grade 2 and grade 0, respectively. Radiography revealed osteophytes or subchondral cystic lesions on the right and left stifle joints. Osteoarthrosis (OA) scores for the right and left stifle joints were 20 and 12 respectively. Combination of surgery and implantation of autologous adipose tissue derived mesenchymal stem cells (aAT-MSCs) was determined with informed consent. 1 × 106 aAT-MSCs suspended in PBS and 0.6 mL of hyaluronic acid were injected in the right stifle joint postoperatively. Osteoarthrosis scores and the lameness grade for the right and left stifle joints were 19 and 13, and 0 and 0 19 months after treatment, respectively, and 14 and 15, and 0 and 0 five years after treatment, respectively. This case report shows radiographical evidence of a decrease in osteophytes and subchondral cystic lesions on the stifle joint with OA after aAT-MSCs injection.

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  • Lessons learned from cloning dogs.

    요약 : 
    The aim of this article is to review dog cloning research and to suggest its applications based on a discussion about the normality of cloned dogs. Somatic cell nuclear transfer was successfully used for production of viable cloned puppies despite limited understanding of in vitro dog embryo production. Cloned dogs have similar growth characteristics to those born from natural fertilization, with no evidence of serious adverse effects. The offspring of cloned dogs also have similar growth performance and health to those of naturally bred puppies. Therefore, cloning in domestic dogs can be applied as an assisted reproductive technique to conserve endangered species, to treat sterile canids or aged dogs, to improve reproductive performance of valuable individuals and to generate disease model animals

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