Valencia Pacheco Guillermo, Nakazawa Ueji Yumi E, Rodríguez Dzul Edwin A, Angulo Ramírez Angélica V, López Villanueva Ricardo F, Quintal Ortiz Irma G, Rosado Paredes Elsy P
Laboratorio de Hematología, Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán. Mérida, Yucatán, México.
Hospital General Agustín O'Horán. Mérida, Yucatán, México.
Colomb Med (Cali). 2017 Sep 30;48(3):105-112. doi: 10.25100/cm.v48i3.2981.
Systemic lupus erythematosus (SLE) is a systemic autoimmune disease that mainly affects women, characterized by the production of autoantibodies. Its causal agent is unknown, but the combination of environmental, hormonal and genetic factors may favor the development of the disease. Parvovirus B19 has been associated with the development of SLE, since it induces the production of anti-single stranded DNA antibodies. It is unknown whether PV-B19 infection is an environmental factor that trigger or reactivate SLE in the Mexican Mayan population.
A preliminary serological and molecular study of PV-B19 infection in Mayan women with established SLE was done.
IgG and IgM anti PV-B19 were evaluated in 66 SLE patients and 66 control subjects, all women of Mayan origin. Viral DNA and viral load were analyzed by qPCR.
Insignificant levels of IgM were observed in 14.3% (4/28) of the patients and 11.4% (4/35) of control subjects. IgG was detected in 82.1% (23/28) of the patients and 82.9% (29/35) of control subjects, but were significantly higher in patients. Viral DNA was found in 86.0% (57/66) of the patients and 81.0% (54/66) of control subjects. Viral load, quantified in 28/66 patients and 31/66 controls which were positive for IgM and IgG, was significantly higher in controls.
The high prevalence of PV-B19 in Yucatan, and the presence of IgM, IgG, and viral load in Mayan women with established SLE suggest that PV-B19 infection could be an environmental factor to trigger or reactivate SLE.
系统性红斑狼疮(SLE)是一种主要影响女性的系统性自身免疫性疾病,其特征为自身抗体的产生。病因不明,但环境、激素和遗传因素的综合作用可能促使该病的发展。细小病毒B19与SLE的发生有关,因为它可诱导抗单链DNA抗体的产生。在墨西哥玛雅人群中,尚不清楚B19病毒感染是否为触发或重新激活SLE的环境因素。
对确诊为SLE的玛雅女性进行B19病毒感染的初步血清学和分子研究。
对66例SLE患者和66例对照者(均为玛雅裔女性)进行了抗B19病毒IgG和IgM检测。通过定量聚合酶链反应(qPCR)分析病毒DNA和病毒载量。
14.3%(4/28)的患者和11.4%(4/35)的对照者中观察到IgM水平无显著差异。82.1%(23/28)的患者和82.9%(29/35)的对照者检测到IgG,但患者中的IgG水平显著更高。86.0%(57/66)的患者和81.0%(54/66)的对照者中发现病毒DNA。对28/66例IgM和IgG呈阳性的患者及31/66例对照者进行病毒载量定量分析,结果显示对照者中的病毒载量显著更高。
尤卡坦半岛B19病毒的高流行率,以及确诊为SLE的玛雅女性中存在IgM、IgG和病毒载量,提示B19病毒感染可能是触发或重新激活SLE的环境因素。