CXCL12 and cancer: The chemokine SDF‐1α (also known as CXCL12) is another example of a potent bioactive chemoattractant, with a crucial role in hematopoietic stem cell homing[104] and cancer progression.[105] LbL films were used to present SDF‐1α in a matrix‐bound manner to assess its functions on myogenic differentiation.[95] The matrix‐bound SDF‐1α (bSDF) was found able to enhance myogenic differentiation by promoting troponin T expression more efficiently than the soluble one, as a function of culture time.