The telomere binding protein Pot1 maintains haematopoietic stem cell activity with age.
The telomere binding protein Pot1 maintains haematopoietic stem cell activity with age.
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DOI:
10.1038/s41467-017-00935-4
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发表时间:
2017-10-06
影响因子:
16.6
通讯作者:
Arai F
中科院分区:
文献类型:
--
作者:
Hosokawa K;MacArthur BD;Ikushima YM;Toyama H;Masuhiro Y;Hanazawa S;Suda T;Arai F
Repeated cell divisions and aging impair stem cell function. However, the mechanisms by which this occurs are not fully understood. Here we show that protection of telomeres 1A (Pot1a), a component of the Shelterin complex that protects telomeres, improves haematopoietic stem cell (HSC) activity during aging. Pot1a is highly expressed in young HSCs, but declines with age. In mouse HSCs, Pot1a knockdown increases DNA damage response (DDR) and inhibits self-renewal. Conversely, Pot1a overexpression or treatment with POT1a protein prevents DDR, maintained self-renewal activity and rejuvenated aged HSCs upon ex vivo culture. Moreover, treatment of HSCs with exogenous Pot1a inhibits the production of reactive oxygen species, suggesting a non-telomeric role for Pot1a in HSC maintenance. Consistent with these results, treatment with exogenous human POT1 protein maintains human HSC activity in culture. Collectively, these results show that Pot1a/POT1 sustains HSC activity and can be used to expand HSC numbers ex vivo. Repeated cell divisions induce DNA damage in haematopoietic stem cells (HSC) and telomeres are sensitive to this damage. Here, the authors show in murine HSCs that the telomere binding protein POT1a inhibited the production of reactive oxygen species, and rejuvenated aged HSCs.
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DOI:
10.1126/science.1170633
发表时间:
2009-11-13
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
de Lange T
通讯作者:
de Lange T
DOI:
10.1084/jem.20081297
发表时间:
2008-09-29
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Chen C;Liu Y;Liu R;Ikenoue T;Guan KL;Liu Y;Zheng P
通讯作者:
Zheng P
DOI:
10.1126/science.1256337
发表时间:
2014-09-19
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Fares I;Chagraoui J;Gareau Y;Gingras S;Ruel R;Mayotte N;Csaszar E;Knapp DJ;Miller P;Ngom M;Imren S;Roy DC;Watts KL;Kiem HP;Herrington R;Iscove NN;Humphries RK;Eaves CJ;Cohen S;Marinier A;Zandstra PW;Sauvageau G
通讯作者:
Sauvageau G
影响因子:
4.8
作者:
Jiang, KC;Pereira, E;Sanchez, Y
通讯作者:
Sanchez, Y
影响因子:
16.8
作者:
Hockemeyer, Dirk;Palm, Wilhelm;Hammer, Gary D.
通讯作者:
Hammer, Gary D.