Cambridge researchers develop stem cell-based hematoid models that mimic early human embryonic stages, creating blood cells for disease study and regenerative medicine.
Breakthrough in Stem Cell Research
The researchers at the University of Cambridge have in an unprecedented massive breakthrough made human blood cells from nothing by growing embryo-like models using stem cells. This finding has the potential of transforming regenerative medicine and promoting the knowledge of blood diseases. This is a new model that has been developed in an ethical and controlled laboratory condition to replicate the early stages of human embryonic development that would be hidden to observation once implantation has occurred.
Creating Embryo‑Like Hematoid Structures
The study group produced hematoids which were three dimensional self-organizing structures made out of human stem cells. These tissues resemble the embryos of human beings around the fourth and fifth weeks of the developmental process; the period when blood cells are formed. Even though hematoids do not form complete embryos, they possess major biological behaviors of biological development. After two weeks, hematoids started to develop reddish spots that could be seen, which pointed to the creation of blood precursors as observed in embryos of human beings.
Understanding the Process of Blood Formation
During the second day of development, hematids are formed comprising of three major germ layers namely ectoderm, mesoderm, and endoderm. In the eighth and the thirteenth day, beating heart cells and red blood-forming cells are produced respectively. These blood generating cells are referred to as hematopoietic stem cells and can develop into red blood cells which carry oxygen and into white blood cells which reinforce the immune system. The model provides researchers a clear opportunity to look into the early human blood formation which was not previously available to study.
Implications for Regenerative Medicine and Blood Diseases
The Cambridge team showed that blood stem cells grown in hematids are able to develop into various cell types with some of these cells being T-cells which are needed by the immune system. This naturalistic system allows cells and growth factors to grow in their own natural environment unlike the traditional lab methods which depend on artificial growth proteins, thus making it more accurate and reliable. Dr. Jitesh Neupane of Gurdon Institute believes that this would result in better drug testing, disease modeling, and ultimately, tailored regenerative treatments.
A Step Toward Personalized Treatments
Professor Azim Surani, a senior researcher, noted that the creation of human blood cells in a laboratory is a significant milestone towards the creation of personalised medicine. Co-author Dr. Geraldine Jowett further wrote that hematoids are a reproduction of a second wave of blood formation, which produces immune cells, and this opens the door to understanding leukemia and other immunological diseases. This study was published in Cell Reports as peer-reviewed and ethically sound, and the patent was filed by Cambridge Enterprise to continue clinical use in the future. Now scientists are confident that such hematids will assist in creating long-term and patient-specific blood stem cells with transplantation and immune cure.
