Figure 2. Significance of this study (IMAGE) Tokyo Medical and Dental University Caption Significance of this study： Hematopoietic stem cells do not maintained and expanded in vitro. This study will contribute to the development of technology for in vitro proliferation of hematopoietic stem cells in bone marrow. Based on the findings of this study, a new technology to increase the number of hematopoietic stem cells from bone marrow in vitro is expected to be developed. Credit Department of Stem Cell Regulation, TMDU Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.