Heterophilic antibodies, comprising both "true" heterophilic antibodies and human anti-mouse antibodies (HAMA), represent an important source of interference in laboratory medicine, thus including cardiospecific troponin(s) testing. We describe the case of a 76-years-old woman with implausible and persistent elevation of cardiospecific troponin I, which was finally attributed to interference from heterophilic antibodies. According to literature data, the frequency of this interference ranges between 0.1 and 3.1%, is almost unpredictable and unsuspected, may involve both cardiospecific troponins I and T, and may virtually affect any type of immunoassay, either one- or two-step. The presence of interfering antibodies should always be suspected when test results do not go hand in hand with the clinics, or with the results of additional radiological and laboratory investigations. Once other causes of interference have been ruled out, test repetition with an alternative assay and removal of interfering antibodies with heterophilic antibodies blocking reagent, normal mouse serum, immobilized protein A column or polyethylene glycol may be advisable. As a simple alternative, measurement of serial dilutions of suspected samples usually shows nonlinearity of test results in the presence of heterophilic antibodies.

Interference from heterophilic antibodies in troponin testing. Case report and systematic review of the literature / Giuseppe Lippi;Rosalia Aloe;Tiziana Meschi;Loris Borghi;Gianfranco Cervellin. - In: CLINICA CHIMICA ACTA. - ISSN 0009-8981. - 426(2013), pp. 79-84. [10.1016/j.cca.2013.09.004]

Interference from heterophilic antibodies in troponin testing. Case report and systematic review of the literature

MESCHI, Tiziana;BORGHI, Loris;
2013

Abstract

Heterophilic antibodies, comprising both "true" heterophilic antibodies and human anti-mouse antibodies (HAMA), represent an important source of interference in laboratory medicine, thus including cardiospecific troponin(s) testing. We describe the case of a 76-years-old woman with implausible and persistent elevation of cardiospecific troponin I, which was finally attributed to interference from heterophilic antibodies. According to literature data, the frequency of this interference ranges between 0.1 and 3.1%, is almost unpredictable and unsuspected, may involve both cardiospecific troponins I and T, and may virtually affect any type of immunoassay, either one- or two-step. The presence of interfering antibodies should always be suspected when test results do not go hand in hand with the clinics, or with the results of additional radiological and laboratory investigations. Once other causes of interference have been ruled out, test repetition with an alternative assay and removal of interfering antibodies with heterophilic antibodies blocking reagent, normal mouse serum, immobilized protein A column or polyethylene glycol may be advisable. As a simple alternative, measurement of serial dilutions of suspected samples usually shows nonlinearity of test results in the presence of heterophilic antibodies.
Interference from heterophilic antibodies in troponin testing. Case report and systematic review of the literature / Giuseppe Lippi;Rosalia Aloe;Tiziana Meschi;Loris Borghi;Gianfranco Cervellin. - In: CLINICA CHIMICA ACTA. - ISSN 0009-8981. - 426(2013), pp. 79-84. [10.1016/j.cca.2013.09.004]
File in questo prodotto:
File Dimensione Formato  
2013_Interference-from-heterophilic-antibodies-in-troponin-testing-Case-report-and-systematic-review-of-the-literature_Clinica-Chimica-Acta.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Creative commons
Dimensione 275.09 kB
Formato Adobe PDF
275.09 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2762345
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 59
  • ???jsp.display-item.citation.isi??? 45
social impact