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Template:Heslo náhled|vpravo|250px|ANA positive, speckled pattern. cell line HEp-20-10, conjugated with FITC. ANA (anti-nuclear antibodies) are non-specific antibodies that target cellular components in the nucleus - histones, DNA, non-histone proteins, proteins of the nuclear membrane, and a variety of other antigenic structures. Standard in detection of ANA is direct immunofluorescence on human epithelial laryngeal carcinoma cell culture. Positive results are further analysed according to different fluorescent patterns present.
ANA positivity can be found in following disorders:

ANAs are primarily used in the diagnosis of systemic lupus and also as a screening test for individually targeted antibodies. A positive result should always be evaluated in the clinical context of the patient.

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