cell ageing in a sentence

1. Study on angiotensin inducing endothelial cell aging in vitro
2. Increased skin surface activity , the metabolism of trace elements regulate cell growth . enhance the vitality of elastin and collagen protein , preventing cell aging and promote cell regeneration and increase blood circulation . improving metabolism , anti - bacterial , anti - itching … … the aging of the skin , relax , bark , diaopi , have had some effect
3. We concluded that excessive expression of exogenous htr gene may compete with the endogenous telomerase rna and prevent rna template from combining with telomeric dna , thus repressing the elongation of telomeric dna ( telomeres ) and causing cell aging and cell death . - 6 - 3 . some modifications have been made to overcome the limitation of conventional telomeric repeat amplification protocol ( trap ) assay
4. It's difficult to find cell ageing in a sentence.