Related by context. Frequent words. (Click for all words.) 84 adult stem cells 84 embryonic stem cells 80 stem cell 76 neural stem cells 72 iPS cells 72 embryonic cells 72 Stem cells 71 progenitor cells 67 stem cell therapy 65 embryos 65 stem cell therapies 64 adult stem cell 64 cells 64 embryo 64 human embryos 63 fibroblasts 63 Embryonic stem cells 62 human embryonic stem 62 tissue 62 therapeutic cloning 62 immune cells 62 umbilical cord blood 60 embryonic stem cell 60 insulin producing 59 dendritic cells 59 stem cell research 59 tissues 59 Stem Cells 59 Stem cell 58 tumor cells 58 gene therapy 58 bone marrow 58 Stem Cell 58 regenerative medicine 57 autologous 56 transplantation 56 proteins 56 nerve cells 55 cord blood 55 antibodies 55 embryonic 55 fertilized eggs 55 bone marrow transplants 55 telomerase 54 microRNAs 54 miRNAs 54 adipose tissue 54 lymphocytes 54 enzymes 53 miRNA 53 motor neurons 53 gene 53 tumors 53 grafts 53 hair follicles 53 cancerous cells 53 enzyme 53 malignant cells 52 platelets 52 genes 52 zebrafish 52 epithelial cells 52 immunological 52 fertilized egg 52 follicles 52 malignant tumors 52 peptides 51 endothelial cells 51 nanoparticles 51 Cells 51 astrocytes 51 Stem Cell Research 51 cloning 51 pancreatic 51 ovary 51 stem cell transplant 51 prions 50 tissue regeneration 50 sperm 50 protein 50 pancreas 50 collagen 50 livers 50 antigens 50 cytokine 50 tumor 50 antibody 50 vitro 49 muscle tissue 49 monoclonal antibodies 49 neurons 49 microRNA 49 ovaries 49 blood vessels 49 macrophages 49 transcription factors 49 mitochondria 49 cytokines 49 skeletal muscle 49 gene expression 49 signaling pathway