Related by context. Frequent words. (Click for all words.) 51 damaged spinal cords 50 nanomachines 48 mutant proteins 47 biological molecules 47 nanobots 47 regenerate cartilage 47 neural cells 46 regenerate tissue 46 single celled organisms 46 nanorobots 46 nanobacteria 45 nanosensors 45 stem cells harvested 45 viral vectors 45 pinhead sized 45 Shewanella 44 multiple simultaneous immunological 44 tendons ligaments 44 Scientists theorize 44 genetic manipulations 44 petri dishes 44 neurotrophic factors 44 Nerve cells 44 implanted electrodes 43 stem cells 43 microbes 43 microdevices 43 trillions 42 synthetic genome 42 exoskeletons 42 optogenetics 42 micro RNAs 42 supercomputer simulations 42 peptide hormone 42 organisms 41 bone marrow stem cells 41 nematode worms 41 transplanted stem cells 41 electrodes implanted 41 ribozymes 41 experiments 41 biologically validated novel 41 nanobubbles 41 nano particles 41 viral antigens 41 ribonucleic acid RNA 41 nanosensor 41 proteasomes 40 undifferentiated cells 40 Tumor cells 40 genetically altered 40 Head bangingResearch 40 engineered tumor antigens 40 mutant flies 40 neuropeptides 40 tissue grafts 40 Adult stem cells 40 gene splicing 40 biochemical processes 40 metagenomics 39 reimplanted 39 proteins encoded 39 cells 39 primordial soup 39 Macrophages 39 involves implanting 39 nanobot 39 antiparticles 39 biomimetic 39 bioengineer 39 reprogrammed cells 39 nanosystems 39 semiconducting materials 39 inject insulin 39 nanoporous 39 lab rats 39 PTEN gene 39 neural crest cells 39 pluripotent stem cells 39 photochemistry 39 clathrates 39 medicinal chemists 39 chemical reactions 39 genetically engineered mouse 38 soliton 38 baker yeast 38 pluripotent cells 38 magnetic resonance spectroscopy 38 serotonin neurotransmitter 38 billions 38 extract stem cells 38 cloned stem cells 38 artificial retina 38 microfluidic chip 38 electromagnetic pulses 38 protoplasm 38 BrainGate 38 microgravity environment 38 Petri dishes 38 self replicating 38 microscopic organisms