Effects of telomere length on leukemogenesis
Effects of telomere length on leukemogenesis
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端粒长度对白血病发生的影响
DOI:
10.1007/s11427-019-9588-7
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发表时间:
2019-07
期刊:
影响因子:
--
通讯作者:
Cheng H
中科院分区:
文献类型:
--
作者:
Ma Shi;Sun G;Yang S;Ju Z;Cheng T;Cheng H
Most cancer cells maintain the length of their telomeres via telomerase (Günes and Rudolph, 2013; Kim et al., 1994). However, in some cancers, telomeres are maintained not by telomerase but by alternative lengthening of telomeres (Bryan et al., 1997). Telomerase activity appears to be reduced in some bone marrow (BM) diseases, including chronic myeloid leukemia, acute myeloid leukemia (AML), and myeloproliferative neoplasms (MPN), leading to shortened telomeres that correlate with leukemogenesis (Bouillon et al., 2018; Engelhardt et al., 2000; Shay et al., 1996). Our current study aimed to determine the definitive roles of telomeres and telomerase in leukemogenesis. To obtain mice with shortened telomeres, telomerase RNA component (TERC) knockout mice (TERC−/−) were used. As previously reported, first generation (G1) TERC−/− mice lacked detectable telomerase activity but exhibited largely intact telomeres, whereas third generation (G3) of TERC−/− mice lacked detectable telomerase activity and exhibited severe telomere dysfunction (Blasco et al., 1997). Therefore, we used young (two-month-old) and old (one-year-old) 1st and 3rd generation TERC−/− KO mice (G1 and G3) along with heterozygous control mice (TERC+/− F1)(Figure S1A in Supporting Information). Real-time qPCR analysis confirmed that G3 mice exhibited shorter telomeres than both F1 and G1 mice (Figure S1B in Supporting Information). We enriched lineage negative (Lin–) BM cells from mice using MACS beads and transduced them via retroviruses overexpressing the MLL-AF9 gene to induce AML (Cheng et al., 2015)(Figure 1 A). All groups showed similar transduction efficiency, as shown by flow cytometry (Figure S2 in Supporting Information). Next, 1× 10 4 transduced cells (GFP+) were sorted and transplanted together with 5× 10 5 CD45. 2+ BM cells into lethal-irradiated recipients. All recipient mice developed AML within 150 days (Figure 1 B, Figure S3 in Supporting Information). However, G1 and G3 GFP+ cells required more time to develop AML than F1 GFP+ cells in both the young and old groups (Figure 1 B). As old TERC−/− mice exhibit shorter telomeres than young mice, our data revealed that old G1 and G3 transduced cells have a longer latency than young cells (Figure 1 B), demonstrating that short telomeres can slow down the development of AML. We then backcrossed G3 mice with F1 mice to obtain iF1 and iG4 mice (Figure S1 in Supporting Information). We used the same strategy to induce AML and compared survival curves of the recipients injected with young F1, iF1,
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影响因子:
11.4
作者:
Jerry W. Shay;Harold Werbin;W. Wright
通讯作者:
Jerry W. Shay;Harold Werbin;W. Wright
影响因子:
11.2
作者:
M. Engelhardt;K. MacKenzie;P. Drullinsky;R. Silver;M. Moore
通讯作者:
M. Engelhardt;K. MacKenzie;P. Drullinsky;R. Silver;M. Moore
影响因子:
20.3
作者:
Cheng, Hui;Hao, Sha;Cheng, Tao
通讯作者:
Cheng, Tao
影响因子:
64.8
作者:
Viale, Andrea;De Franco, Francesca;Pelicci, Pier Giuseppe
通讯作者:
Pelicci, Pier Giuseppe
影响因子:
64.8
作者:
Krivtsov, Andrei V.;Twomey, David;Armstrong, Scott A.
通讯作者:
Armstrong, Scott A.