ICAM1 and atrial fibrillation: As shown in Table 1, results confirmed higher mRNA expression levels in immature rat NP as compared to AF for several cell surface receptors CD239 (Lu), CD151 (PETA-3), CD24, CD54 (ICAM), CD325 (CDH2) and galectin-1(GAL-1) identified in previous studies of rat, porcine, bovine or human IVDs [27], [30], [33], [37], [38].