HSF1 graphic (IMAGE) University of California - San Diego Caption The HSF1-mediated heat shock pathway promotes proteostasis in hematopoietic stem cells in culture and during aging. Credit Cell Stem Cell Usage Restrictions Use photo credit. License Original 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.