Disease-associated increased HIF-1, alphavbeta3 integrin, and Flt-1 do not suffice to compensate the damage-inducing loss of blood vessels in inflammatory myopathies - PubMed (original) (raw)

Comparative Study

doi: 10.1007/s00296-003-0379-z. Epub 2003 Sep 12.

Affiliations

Comparative Study

Disease-associated increased HIF-1, alphavbeta3 integrin, and Flt-1 do not suffice to compensate the damage-inducing loss of blood vessels in inflammatory myopathies

Yrjö T Konttinen et al. Rheumatol Int. 2004 Nov.

Abstract

Objective: To analyze the microvascular network in skeletal muscle biopsies from patients with dermatomyositis (DM) and systemic sclerosis (SSc) compared to polymyositis (PM) and systemic lupus erythematosus (SLE), and non-inflammatory myopathies, and to clarify whether reparative angiogenesis-related factors are expressed in parallel to blood vessel damage.

Methods: Immunohistochemical staining of muscle biopsies (10 DM, 10 SSc, 10 PM, 10 SLE, and 10 non-inflammatory myopathies) with antibodies against von Willebrand factor (vWF), hypoxia-inducible factor-1beta (HIF-1beta), beta3 integrin subunit, and vascular endothelial growth factor receptor-1 (VEGFR-1). The TechMate staining robot and biotin-streptavidin protocol were used.

Results: DM and SSc muscles were characterized by endothelial damage and reduction of blood vessel network. Expression of angiogenesis-related factors (HIF-1beta, beta3, VEGFR-1) was also found in the same biopsies. In contrast, in PM and SLE muscles, vascular networks were apparently not affected and angiogenic stimuli were less expressed if at all.

Conclusions: This work demonstrates that in inflamed muscles hypoxia/ischemia induces increased expression of angiogenic factors, yet their impact is insufficient to repair disease-associated reduction of the capillary network. This leads to questions considering the usefulness of angiogenic factors in the treatment of ischemic inflammatory myopathies in DM and SSc.

PubMed Disclaimer

Similar articles

Cited by

References

    1. J Rheumatol. 1996 Nov;23(11):1880-6 - PubMed
    1. Int J Dermatol. 1990 Mar;29(2):117-20 - PubMed
    1. N Engl J Med. 1975 Feb 13;292(7):344-7 - PubMed
    1. Arthritis Rheum. 1997 May;40(5):865-74 - PubMed
    1. Trends Mol Med. 2001 Aug;7(8):345-50 - PubMed

Publication types

MeSH terms

Substances

LinkOut - more resources