potential role type 2 diabetes metabolic syndrome 12s rrnac ongoing motsc inflammatory response price contact motsc 5mg treating osteoporosis aging motsc mitochondrial dna mitochondrialderived peptide osteoporosis motsc stands nuclear dna exercise potential therapeutic strategy improved heart function improve cognitive function enhance exercise endurance 16amino acid peptide promote healthy aging protect brain cells exerciseinduced stress mimics inhibit osteoclast activity obesity agerelated diseases