PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9778049-3 1998 Herein we show that RA-induced LCL accumulation in the G0/G1 phases correlated with the loss of the catalytic activity of all three G1-associated CDKs (CDK2, CDK4 and CDK6) and with increased levels of underphosphorylated pRb and, in some LCLs, p130. Tretinoin 20-22 cyclin dependent kinase 4 Homo sapiens 158-162 9778049-6 1998 p27Kip-1 may also contribute to the inhibition of CDK4 kinase activity, as the amount of CDK4-associated p27Kip-1 was increased by 50% after RA exposure. Tretinoin 141-143 cyclin dependent kinase 4 Homo sapiens 50-54 9778049-6 1998 p27Kip-1 may also contribute to the inhibition of CDK4 kinase activity, as the amount of CDK4-associated p27Kip-1 was increased by 50% after RA exposure. Tretinoin 141-143 cyclin dependent kinase 4 Homo sapiens 89-93 9778049-9 1998 Overall, these results demonstrate that RA treatment of EBV-immortalized B lymphocytes is associated with multiple effects on G1 regulatory proteins, including p27Kip1 up-regulation, decreased levels of cyclins D2, D3 and A, and inhibition of CDK2, CDK4 and CDK6 activity, which ultimately result in reduced pRb phosphorylation and G0/G1 growth arrest. Tretinoin 40-42 cyclin dependent kinase 4 Homo sapiens 249-253