Measurement of recombinant porcine factor VIII in patients with congenital haemophilia A and inhibitors in the presence of emicizumab.
Haemophilia
; 30(2): 545-553, 2024 Mar.
Article
en En
| MEDLINE
| ID: mdl-38343119
ABSTRACT
INTRODUCTION:
Recombinant porcine factor VIII (rpFVIII) is a treatment option for break-through bleeds in patients with congenital haemophilia A with inhibitors (CHAwI) on emicizumab. However, there are limited data about the measurement of rpFVIII in the presence of emicizumab.AIM:
To analyse whether rpFVIII can be measured with a chromogenic assay with bovine component (bCSA) in plasma from CHAwI on emicizumab treatment.METHODS:
In the first part of the study, FVIII deficient plasma was spiked with rpFVIII, in the second part, commercial plasma from CHAwI was spiked with emicizumab and rpFVIII, and in the third part, plasma from CHAwI on emicizumab treatment was spiked with rpFVIII. FVIII was then measured with bCSA and a chromogenic assay with human component (hCSA). Thrombin generation (TG) and clot-waveform analysis (CWA) were also carried out.RESULTS:
The recovery of rpFVIII measured with bCSA is approximately 80% and is further influenced by the presence of an anti-porcine inhibitor. rpFVIII assessed with hCSA was influenced by emicizumab. CWA and TG showed a weak correlation with baseline emicizumab concentration, but peak thrombin and CWA correlated well with increasing emicizumab concentrations and rpFVIII activities.CONCLUSION:
This study indicates that rpFVIII can be measured in the presence of emicizumab with a bCSA. A calibration curve for the measurement of rpFVIII with bCSA should be established.Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Trombosis
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Anticuerpos Biespecíficos
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Anticuerpos Monoclonales Humanizados
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Hemofilia A
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Haemophilia
Asunto de la revista:
HEMATOLOGIA
Año:
2024
Tipo del documento:
Article
País de afiliación:
Alemania