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The presence of such a gap suggested communication via chemical messengers traversing the synaptic cleft, and in 1921 German pharmacologist Otto Loewi confirmed that neurons can communicate by releasing chemicals
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Commun Biol 8 , 1283 (2025)
A variety of cellular stresses, including DNA damage can cause the induction of cellular senescence, which represents a multifaceted and highly heterogeneous cellular state characterized by irreversible growth arrest and importantly the secretion of a multitude of factors, including proteases and chemokines 2
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