title: The future of collateral artery research.
abstract: In the event of obstructive coronary artery disease, collateral arteries have been deemed an alternative blood source to preserve myocardial tissue perfusion and function. Monocytes play an important role in modulating this process, by local secretion of growth factors and extracellular matrix degrading enzymes. Extensive efforts have focused on developing compounds for augmenting the growth of collateral vessels (arteriogenesis). Nonetheless, clinical trials investigating the therapeutic potential of these compounds resulted in disappointing outcomes. Previous studies focused on developing compounds that stimulated collateral vessel growth by enhancing monocyte survival and activity. The limited success of these compounds in clinical studies, led to a paradigm shift in arteriogenesis research. Recent studies have shown genetic heterogeneity between CAD patients with sufficient and insufficient collateral vessels. The genetic predispositions in patients with poorly developed collateral vessels include overexpression of arteriogenesis inhibiting signaling pathways. New directions of arteriogenesis research focus on attempting to block such inhibitory pathways to ultimately promote arteriogenesis. Methods to detect collateral vessel growth are also critical in realizing the therapeutic potential of newly developed compounds. Traditional invasive measurements of intracoronary derived collateral flow index remain the gold standard in quantifying functional capacity of collateral vessels. However, advancements made in hybrid diagnostic imaging modalities will also prove to be advantageous in detecting the effects of pro-arteriogenic compounds.
authors: Nazanin
authors: N
authors: Hakimzadeh
authors: Hein J
authors: HJ
authors: Verberne
authors: Maria
authors: M
authors: Siebes
authors: Department of Cardiology, Room B2-250, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands. j.j.piek@amc.uva.nl.
authors: Jan J
authors: JJ
authors: Piek
mesh_terms: D043925:Angiogenesis Inducing Agents / Q000494:pharmacology; D000818:Animals; D035843:Biomedical Research / Q000639:trends*; D018932:Chemokine CCL2 / Q000494:pharmacology; D003097:Collateral Circulation / Q000502:physiology*; D003115:Colony-Stimulating Factors / Q000494:pharmacology; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000175:diagnosis / Q000503:physiopathology*; D003326:Coronary Circulation / Q000502:physiology*; D054059:Coronary Occlusion / Q000175:diagnosis / Q000503:physiopathology* / Q000628:therapy; D005544:Forecasting; D006801:Humans; D051379:Mice; D009000:Monocytes / Q000502:physiology; D013312:Stress, Physiological / Q000502:physiology
chemical_list: D043925:Angiogenesis Inducing Agents; C111835:CCL2 protein, human; D018932:Chemokine CCL2; D003115:Colony-Stimulating Factors
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