Abstract | OBJECTIVE: To explore the apoptosis and its mechanisms of spleen CD4⁺ CD25⁺ regulatory T (Treg) cells in severe aplastic anemia (SAA) mouse model induced by interferon (IFN-γ) in combination with busulphan (BU). METHODS: The BALB/c female mice SAA model was induced by intraperitoneal injection with IFN-γ and intragastric administration with BU (combined group, n=16), with BU group (n=16), IFN-γ group (n=16) and normal group (n=16) as controls. Spleen Treg cells were purified by using of immunomagnetic beads. Apoptosis was detected by flow cytometry. AKt and TGF-β expression was measured by Western blot. RESULTS: Apoptosis of spleen Treg cells in combined group [(33.21±0.65)%] was significantly higher than that in BU group [(21.58±0.64)%], IFN-γ group [(17.62±1.05)%], and control[(27.38±1.89)%] (P<0.05). A significantly lower expression of AKt and TGF-β protein was also seen in combined group (0.30±0.05 and 0.17±0.05), as compared to the other three groups (P<0.05). CONCLUSION: Excessive apoptosis of Treg cells was found in SAA mouse model, which may be a cause of Treg cells decrease in patients with AA. The down-regulated expression of AKt and TGF-β could play a role in increased apoptosis of Treg cells. Our data may provide a new treatment strategy in AA.
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Authors | Wen-ping Lu, Zeng-hua Lin, Hong Liu, Wei Lu, Hai-yan Liu, Xu-li Wang |
Journal | Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi
(Zhonghua Xue Ye Xue Za Zhi)
Vol. 34
Issue 11
Pg. 931-5
(Nov 2013)
ISSN: 0253-2727 [Print] China |
PMID | 24294847
(Publication Type: English Abstract, Journal Article, Research Support, Non-U.S. Gov't)
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Topics |
- Anemia, Aplastic
(prevention & control)
- Animals
- Apoptosis
- Disease Models, Animal
- Female
- Mice
- Mice, Inbred BALB C
- Spleen
(cytology)
- T-Lymphocytes, Regulatory
(cytology)
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