Methods:  CA-4-P was given i.v. (25 mg/kg on alternate days for 14 days) to mice subjected to angiogenic stimuli (prazosin or synergist

extirpation). The responses of femoral artery blood flow as well as capillarity, capillary ultrastructure, and levels of Rho GTPase were measured. Results:  Blood flow was unaffected in the sprouting angiotype, but decreased MG-132 molecular weight in the splitting angiotype, by CA-4-P. In contrast, CA-4-P attenuated the capillarity increase in both models, associated with reduced lamellipodia and filopodia formation. Muscle overload, but not hyperemia, was accompanied by an increase in Rho GTPase with CA-4-P. Conclusions:  CA-4-P impaired the angiogenic response in both experimental models. This inhibitory effect was associated with a lower increase in femoral blood flow in splitting, whereas sprouting angiogenesis was accompanied by higher Rho activity consistent with the interruption of actin polymerization. Thus, CA-4-P may exert context-dependent anti-vascular and anti-angiogenic effects in vivo under physiological conditions. “
“Please

cite this paper as: Meisner and Price (2010). Spatial and Temporal Coordination of Bone Marrow-Derived Cell Activity during Arteriogenesis: Regulation of the Endogenous Response and Therapeutic Implications. Microcirculation17(8), 583–599. Arterial occlusive disease is the leading cause of morbidity

and mortality throughout the developed world, which creates a significant need for effective therapies to halt disease EPZ-6438 in vivo progression. Despite success of animal and small-scale human therapeutic arteriogenesis studies, this promising concept for treating Y-27632 2HCl arterial occlusive disease has yielded largely disappointing results in large-scale clinical trials. One reason for this lack of successful translation is that endogenous arteriogenesis is highly dependent on a poorly understood sequence of events and interactions between bone marrow derived cells (BMCs) and vascular cells, which makes designing effective therapies difficult. We contend that the process follows a complex, ordered sequence of events with multiple, specific BMC populations recruited at specific times and locations. Here, we present the evidence suggesting roles for multiple BMC populations—from neutrophils and mast cells to progenitor cells—and propose how and where these cell populations fit within the sequence of events during arteriogenesis. Disruptions in these various BMC populations can impair the arteriogenesis process in patterns that characterize specific patient populations. We propose that an improved understanding of how arteriogenesis functions as a system can reveal individual BMC populations and functions that can be targeted for overcoming particular impairments in collateral vessel development.