TPA-treated HL-60 cells are mainly arrested in G1 by p21(WAF1) accumulation. We investigate the downstream changes following such accumulation. Increased p21(WAF1) is associated with CDK2 and CDK4. pRb is dephosphorylated in the presence of p21-CDK2/4 complexes, and the Rb-E2F1 complex increases after TPA treatment, whereas the Rb-HDAC1 complex decreases slightly. Our results suggest that increased p21(WAF1) is associated with CDK2/4, and that these complexes induce pRb dephosphorylation. In turn, hypophosphorylated pRb are mainly complexed with E2F1, but HDAC1 appears not to be a key component in this process.
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CSIR, Cent Drug Res Inst, Div Pharmacol, Cardiovasc Unit, Lucknow 226001, Uttar Pradesh, IndiaCSIR, Cent Drug Res Inst, Div Pharmacol, Cardiovasc Unit, Lucknow 226001, Uttar Pradesh, India
Kumar, Sachin
Barthwal, Manoj Kumar
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CSIR, Cent Drug Res Inst, Div Pharmacol, Cardiovasc Unit, Lucknow 226001, Uttar Pradesh, IndiaCSIR, Cent Drug Res Inst, Div Pharmacol, Cardiovasc Unit, Lucknow 226001, Uttar Pradesh, India
Barthwal, Manoj Kumar
Dikshit, Madhu
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CSIR, Cent Drug Res Inst, Div Pharmacol, Cardiovasc Unit, Lucknow 226001, Uttar Pradesh, IndiaCSIR, Cent Drug Res Inst, Div Pharmacol, Cardiovasc Unit, Lucknow 226001, Uttar Pradesh, India
机构:
Univ New S Wales, Ctr Vasc Res, Sydney, NSW 2052, AustraliaUniv New S Wales, Ctr Vasc Res, Sydney, NSW 2052, Australia
Ishii, Hideto
Hulett, Mark D.
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La Trobe Univ, Dept Biochem, Ctr Vasc Res, Melbourne, Vic, AustraliaUniv New S Wales, Ctr Vasc Res, Sydney, NSW 2052, Australia
Hulett, Mark D.
Li, Jian-Mei
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Univ New S Wales, Ctr Vasc Res, Sydney, NSW 2052, AustraliaUniv New S Wales, Ctr Vasc Res, Sydney, NSW 2052, Australia
Li, Jian-Mei
Santiago, Fernando S.
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Univ New S Wales, Ctr Vasc Res, Sydney, NSW 2052, AustraliaUniv New S Wales, Ctr Vasc Res, Sydney, NSW 2052, Australia
Santiago, Fernando S.
Parish, Christopher R.
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Australian Natl Univ, John Curtin Sch Med Res, Dept Immunol, Ctr Vasc Res, Canberra, ACT 2601, AustraliaUniv New S Wales, Ctr Vasc Res, Sydney, NSW 2052, Australia
Parish, Christopher R.
Khachigian, Levon M.
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Univ New S Wales, Ctr Vasc Res, Sydney, NSW 2052, AustraliaUniv New S Wales, Ctr Vasc Res, Sydney, NSW 2052, Australia