Soluble CD40L in peripheral artery disease

Andrew D. Blann; Kiat T. Tan; Muzahir H. Tayebjee; Indran Davagnanam; Mark Moss; Gregory Y. H. Lip

doi:10.1160/TH04-09-0586

Thrombosis and Haemostasis, Table of Contents

Thromb Haemost 2005; 93(03): 578-583
DOI: 10.1160/TH04-09-0586

Cell Signalling and Vessel Remodelling

Schattauer GmbH

Soluble CD40L in peripheral artery disease

Relationship with disease severity, platelet markers and the effects of angioplasty

Andrew D. Blann

¹Haemostasis Thrombosis and Vascular Biology Unit, University Department of Medicine, City Hospital, Birmingham, UK

,

Kiat T. Tan

¹Haemostasis Thrombosis and Vascular Biology Unit, University Department of Medicine, City Hospital, Birmingham, UK

,

Muzahir H. Tayebjee

¹Haemostasis Thrombosis and Vascular Biology Unit, University Department of Medicine, City Hospital, Birmingham, UK

,

Indran Davagnanam

²Department of Radiology, City Hospital, Birmingham, UK

,

Mark Moss

²Department of Radiology, City Hospital, Birmingham, UK

,

Gregory Y. H. Lip

²Department of Radiology, City Hospital, Birmingham, UK

› Author Affiliations

Abstract

Summary

Although soluble CD40L (sCD40L, possibly derived from platelets and pro-inflammatory in vitro) may be implicated in thrombosis and haemostasis, there are little data in peripheral artery disease (PAD). We hypothesised the following: (a) that sCD40L relates to the clinical severity of PAD; and (b) that peripheral artery angioplasty acutely raises sCD40L levels. sCD40L was compared to established platelet markers soluble P selectin, platelet microparticles and platelet surface expression of CD62 and CD63. We recruited 36 healthy controls, 33 patients with intermittent claudication (IC), and 33 with symptomatically more severe critical limb is chaemia (CLI), measuring plasma markers by ELISA and membrane markers by flow cytometry. Eleven patients with CLI subsequently underwent peripheral artery angioplasty: blood was taken before and 10 minutes after the intervention. Results show that sCD40L was raised in IC at median 68 (IQR 28–333) pg/ml and in CLI at 64 (34–282) pg/mL compared to 35 (IQR 28–55) pg/ml in the healthy controls (p=0.009). Levels were no different between IC and CLI. The same distribution pattern was present for soluble P selectin, %platelets CD62+ve and CD63+ve. sCD40L failed to correlate significantly with ABPI (p=0.264), unlike %platelets CD62+ve (p=0.0032) and CD63+ve (p=0.009). Pre-angioplasty sCD40L level of 72 (35–610) ng/ml rose to 100 ng/ml (IQR=60–237)(p=0.018) post–angioplasty. Plasma sCD40L, in addition to other platelet indices, is raised in peripheral atherosclerosis and is increased by peripheral artery angioplasty, although levels seem unrelated to clinical severity. Failure to correlate with other markers suggest the platelet may not be the sole source of sCD40L, and that other cells may contribute to plasma levels.

Keywords

Platelets - CD40L - peripheral vascular disease - angioplasty - thrombosis - CD154

Full Text

References

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