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The analysis of cell-free DNA concentrations and integrity in serum of initial and treated of lymphoma patients.
Clinical Biochemistry 2018 October 5
OBJECTIVE: To evaluate cell-free DNA (cfDNA) in plasma as a promising biomarker for lymphoma, altered levels of cfDNA and its association with clinical parameters are investigated in patients suffered from lymphomas.
METHODS: Peripheral blood specimens were collected from 60 patients with lymphoma during initial diagnosis and those of another 107 patients with lymphoma during treated stage were also collected, 93 healthy volunteers were selected as control group. Quantitative PCR was used to detect cfDNA level in each group, cfDNA level in different groups was analyzed to understand its relationship with lymphoma patients' clinical features. After correlation analysis between cfDNA and clinical characteristics, Receiver operator characteristic curve was performed to analyze sensitivity and specificity of cfDNA and LDH.
RESULTS: cfDNA concentration and integrity in initial stage of lymphoma patients were significantly higher than those in treated stage, and cfDNA concentration in treated phase was significantly higher than cfDNA concentration in control group. There was no significant difference in cfDNA integrity at treated stage compared with control group. There was no significant correlation between patient's age, gender, extranodal invasion and lymphoma pathological type and cfDNA concentration and integrity; In contrast, there was a significant correlation between ECOG score, LDH content, Ann Arbor stage, IPI, B-symptoms, Ki-67 expression and radiotherapy and cfDNA concentration and integrity, both at the time of initial diagnosis and treated stage. cfDNA concentration detection is an optimal diagnostic indicator, followed by cfDNA integrity detection, the sensitivity and specificity of both are superior to the traditional LDH detection.
CONCLUSION: cfDNA level is significantly increased in lymphomas patient plasma and may help lymphoma screening. cfDNA level may serve as a potential indicator of lymphomas treatment efficacy.
METHODS: Peripheral blood specimens were collected from 60 patients with lymphoma during initial diagnosis and those of another 107 patients with lymphoma during treated stage were also collected, 93 healthy volunteers were selected as control group. Quantitative PCR was used to detect cfDNA level in each group, cfDNA level in different groups was analyzed to understand its relationship with lymphoma patients' clinical features. After correlation analysis between cfDNA and clinical characteristics, Receiver operator characteristic curve was performed to analyze sensitivity and specificity of cfDNA and LDH.
RESULTS: cfDNA concentration and integrity in initial stage of lymphoma patients were significantly higher than those in treated stage, and cfDNA concentration in treated phase was significantly higher than cfDNA concentration in control group. There was no significant difference in cfDNA integrity at treated stage compared with control group. There was no significant correlation between patient's age, gender, extranodal invasion and lymphoma pathological type and cfDNA concentration and integrity; In contrast, there was a significant correlation between ECOG score, LDH content, Ann Arbor stage, IPI, B-symptoms, Ki-67 expression and radiotherapy and cfDNA concentration and integrity, both at the time of initial diagnosis and treated stage. cfDNA concentration detection is an optimal diagnostic indicator, followed by cfDNA integrity detection, the sensitivity and specificity of both are superior to the traditional LDH detection.
CONCLUSION: cfDNA level is significantly increased in lymphomas patient plasma and may help lymphoma screening. cfDNA level may serve as a potential indicator of lymphomas treatment efficacy.
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