Dual-modal molecular imaging and therapeutic evaluation of coronary microvascular dysfunction using indocyanine green-doped targeted microbubbles.
Alimina AwenDehong HuDuyang GaoZihang WangYayun WuHairong ZhengLina GuanYuming MuZonghai ShengPublished in: Biomaterials science (2023)
Coronary microvascular dysfunction (CMD), which causes a series of cardiovascular diseases, seriously endangers human health. However, precision diagnosis of CMD is still challenging due to the lack of sensitive probes and complementary imaging technologies. Herein, we demonstrate indocyanine green-doped targeted microbubbles (named T-MBs-ICG) as dual-modal probes for highly sensitive near-infrared (NIR) fluorescence imaging and high-resolution ultrasound imaging of CMD in mouse models. In vitro results show that T-MBs-ICG can specifically target fibrin, a specific CMD biomarker, via the cysteine-arginine-glutamate-lysine-alanine (CREKA) peptide modified on the surface of microbubbles. We further employ T-MBs-ICG to achieve NIR fluorescence imaging of injured myocardial tissue in a CMD mouse model, leading to a signal-to-background ratio (SBR) of up to 50, which is 20 fold higher than that of the non-targeted group. Furthermore, ultrasound molecular imaging of T-MBs-ICG is obtained within 60 s after intravenous injection, providing molecular information on ventricular and myocardial structures and fibrin with a resolution of 1.033 mm × 0.466 mm. More importantly, we utilize comprehensive dual-modal imaging of T-MBs-ICG to evaluate the therapeutic efficacy of rosuvastatin, a cardiovascular drug for the clinical treatment of CMD. Overall, the developed T-MBs-ICG probes with good biocompatibility exhibit great potential in the clinical diagnosis of CMD.
Keyphrases
- fluorescence imaging
- photodynamic therapy
- high resolution
- human health
- mouse model
- left ventricular
- risk assessment
- coronary artery
- cancer therapy
- coronary artery disease
- quantum dots
- cardiovascular disease
- oxidative stress
- heart failure
- climate change
- single molecule
- living cells
- type diabetes
- drug delivery
- healthcare
- emergency department
- fluorescent probe
- computed tomography
- ultrasound guided
- low dose
- cardiovascular events
- aortic stenosis
- aortic valve
- molecularly imprinted
- high speed
- drug release