Related by context. Frequent words. (Click for all words.) 63 germ cells 61 tumor cells 60 malignant cells 58 progenitor cells 58 melanin 58 hair follicles 57 cancerous cells 57 lymphocytes 57 nerve cells 57 epithelial cells 56 hematopoietic stem cells 56 immune cells 56 thymus 56 cells 56 T lymphocytes 56 reactive oxygen species 56 fibroblasts 56 motor neurons 56 glial cells 56 microglia 55 retinal cells 55 androgens 55 tumors 54 osteoblasts 54 testis 54 epithelium 53 TGF beta 53 follicles 53 neural stem cells 53 osteoclasts 53 endothelial cells 53 neurones 53 organelles 52 dendritic cells 52 oncogenes 52 photoreceptors 52 mammalian cells 52 neurons 52 ovaries 52 monocytes 51 oncogene 51 hair follicle 51 microenvironment 51 pancreatic cells 51 epidermis 51 signaling pathway 51 collagen 51 astrocytes 51 stem cells 51 diseased cells 51 tumor suppressor 51 zebrafish 51 proteins 51 NK cells 50 Akt 50 mitochondria 50 dermis 50 cytoplasm 50 axons 50 sweat glands 50 melanomas 50 hormone estrogen 50 testes 50 neutrophils 50 metastasis 50 inhibitory 50 mutations 50 apoptosis 50 macrophages 50 CD4 + T 50 autophagy 50 cytokines 49 macrophage 49 neuron 49 vasculature 49 ES cells 49 yeast cells 49 protein synthesis 49 amyloid plaques 49 nerve fibers 49 neurogenesis 49 pancreas 49 glands 49 ovarian 49 dendrites 49 mRNAs 49 epithelial 48 cilia 48 signaling molecules 48 elastin 48 estrogen receptor 48 blood vessels 48 enzyme 48 diseased tissue 48 caspase 48 lung tumors 48 precancerous 48 carcinogenesis 48 cancerous tissue 48 proteases 48 myelin