Expression of Shelterin Component POT1 Is Associated with Decreased Telomere Length and Immunity Condition in Humans with Severe Aplastic Anemia
Abnormal telomere attrition has been found to be closely related to patients with SAA in recent years. To identify the incidence of telomere attrition in SAA patients and investigate the relationship of telomere length with clinical parameters, SAA patients (n=27) and healthy controls (n=15) were en...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Journal of Immunology Research |
| Online Access: | http://dx.doi.org/10.1155/2014/439530 |
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| author | Ting Wang Shu-chong Mei Rong Fu Hua-quan Wang Zong-hong Shao |
| author_facet | Ting Wang Shu-chong Mei Rong Fu Hua-quan Wang Zong-hong Shao |
| author_sort | Ting Wang |
| collection | DOAJ |
| description | Abnormal telomere attrition has been found to be closely related to patients with SAA in recent years. To identify the incidence of telomere attrition in SAA patients and investigate the relationship of telomere length with clinical parameters, SAA patients (n=27) and healthy controls (n=15) were enrolled in this study. Telomere length of PWBCs was significantly shorter in SAA patients than in controls. Analysis of gene expression of Shelterin complex revealed markedly low levels of POT1 expression in SAA groups relative to controls. No differences in the gene expression of the other Shelterin components—TRF1, TRF2, TIN2, TPP1, and RAP1—were identified. Addition of IFN-γ to culture media induced a similar fall in POT1 expression in bone marrow cells to that observed in cells cultured in the presence of SAA serum, suggesting IFN-γ is the agent responsible for this effect of SAA serum. Furthermore, ATR, phosphorylated ATR, and phosphorylated ATM/ATR substrate were all found similarly increased in bone marrow cells exposed to SAA serum, TNF-α, or IFN-γ. In summary, SAA patients have short telomeres and decreased POT1 expression. TNF-α and IFN-γ are found at high concentrations in SAA patients and may be the effectors that trigger apoptosis through POT1 and ATR. |
| format | Article |
| id | doaj-art-cb47df0bb421463aaf55b6019080a033 |
| institution | Kabale University |
| issn | 2314-8861 2314-7156 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Immunology Research |
| spelling | doaj-art-cb47df0bb421463aaf55b6019080a0332025-02-03T06:42:18ZengWileyJournal of Immunology Research2314-88612314-71562014-01-01201410.1155/2014/439530439530Expression of Shelterin Component POT1 Is Associated with Decreased Telomere Length and Immunity Condition in Humans with Severe Aplastic AnemiaTing Wang0Shu-chong Mei1Rong Fu2Hua-quan Wang3Zong-hong Shao4Department of Hematology, General Hospital, Tianjin Medical University, 154 Anshandao, Heping, Tianjin 300052, ChinaDepartment of Hematology, General Hospital, Tianjin Medical University, 154 Anshandao, Heping, Tianjin 300052, ChinaDepartment of Hematology, General Hospital, Tianjin Medical University, 154 Anshandao, Heping, Tianjin 300052, ChinaDepartment of Hematology, General Hospital, Tianjin Medical University, 154 Anshandao, Heping, Tianjin 300052, ChinaDepartment of Hematology, General Hospital, Tianjin Medical University, 154 Anshandao, Heping, Tianjin 300052, ChinaAbnormal telomere attrition has been found to be closely related to patients with SAA in recent years. To identify the incidence of telomere attrition in SAA patients and investigate the relationship of telomere length with clinical parameters, SAA patients (n=27) and healthy controls (n=15) were enrolled in this study. Telomere length of PWBCs was significantly shorter in SAA patients than in controls. Analysis of gene expression of Shelterin complex revealed markedly low levels of POT1 expression in SAA groups relative to controls. No differences in the gene expression of the other Shelterin components—TRF1, TRF2, TIN2, TPP1, and RAP1—were identified. Addition of IFN-γ to culture media induced a similar fall in POT1 expression in bone marrow cells to that observed in cells cultured in the presence of SAA serum, suggesting IFN-γ is the agent responsible for this effect of SAA serum. Furthermore, ATR, phosphorylated ATR, and phosphorylated ATM/ATR substrate were all found similarly increased in bone marrow cells exposed to SAA serum, TNF-α, or IFN-γ. In summary, SAA patients have short telomeres and decreased POT1 expression. TNF-α and IFN-γ are found at high concentrations in SAA patients and may be the effectors that trigger apoptosis through POT1 and ATR.http://dx.doi.org/10.1155/2014/439530 |
| spellingShingle | Ting Wang Shu-chong Mei Rong Fu Hua-quan Wang Zong-hong Shao Expression of Shelterin Component POT1 Is Associated with Decreased Telomere Length and Immunity Condition in Humans with Severe Aplastic Anemia Journal of Immunology Research |
| title | Expression of Shelterin Component POT1 Is Associated with Decreased Telomere Length and Immunity Condition in Humans with Severe Aplastic Anemia |
| title_full | Expression of Shelterin Component POT1 Is Associated with Decreased Telomere Length and Immunity Condition in Humans with Severe Aplastic Anemia |
| title_fullStr | Expression of Shelterin Component POT1 Is Associated with Decreased Telomere Length and Immunity Condition in Humans with Severe Aplastic Anemia |
| title_full_unstemmed | Expression of Shelterin Component POT1 Is Associated with Decreased Telomere Length and Immunity Condition in Humans with Severe Aplastic Anemia |
| title_short | Expression of Shelterin Component POT1 Is Associated with Decreased Telomere Length and Immunity Condition in Humans with Severe Aplastic Anemia |
| title_sort | expression of shelterin component pot1 is associated with decreased telomere length and immunity condition in humans with severe aplastic anemia |
| url | http://dx.doi.org/10.1155/2014/439530 |
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