摘要：photoacoustic imaging, also called optoacoustic tomography, is a non-destructive biomedical imaging technique which employs acoustic detection to image optical absorption contrast with high-resolution deep into scattering tissue. photoacoustic imaging overcomes the limit of high light scattering in the tissue and realized in vivo high-resolution and high-contrast imaging in the deep tissue. photoacoustic imaging technology has been rapid development in recent years and make constantly breakthrough from a technical level to the application level. This paper describes the basic principles of photoacoustic imaging technology and make an example analysis by multispectral optoacoustic tomography （MSOT）.

摘要：This report describes the design and synthesis of gold nanostars(AuNSs) containing liposomes by the in situ reduction of gold precursor,HAuCU(pre-encapsulated within the liposomes) through HEPES diffusion and *** with the conventional process that encapsulates the pre-synthesized gold nanoparticles into liposomes during the thin-film hydration step,this facile and convenient method allows the formation and simultaneous encapsulation of AuNSs within *** absorption spectra of AuNSs can be tuned between visible and near infra-red(NIR) regions by controlling the size and morphology of AuNSs through varying the concentrations of HAuCU and *** a proof of concept,we demonstrate the synthesis of AuNSs with a maximum absorbance at 803 nm within the temperature-sensitive *** liposomes can produce stronger photoacoustic signals(1.5 fold) in the NIR region than ***,when there are drugs(i.e.,doxorubicin) within these liposomes,the irradiation with the NIR pulse laser will disrupt the liposomes and trigger the 100%release of these pre-encapsulated drugs within 10 *** comparison,there is neglectable contrast enhancement or minor release(10%) of drugs for the pure liposomes under the same ***,cell experiment shows the potential therapeutic application of this system.

摘要：Uniting dual-modality of fluorescence and photoacoustic(PA)imaging into theranostic nanoprobes is imperative for spatiotemporally tracking of drug delivery,distribution,and ***,we present a rational design strategy of molecularly precise amphiphilic prodrugs BP_(n)-Cy-S-CPT(n=0,5,and 20,refers to the degree of polyethylene glycol(PEG)polymerization;CPT=camptothecin)to tune their self-assembly behaviour,innovatively integrating dual-modal PA and near-infrared(NIR)fluorescence imaging in a single-molecular *** these elaborately designed prodrugs,it is found that only BP_(20)-Cy-S-CPT could form uniform and highly stable self-assemblies,especially in showing synergistically enhanced PA and dualchannel NIR *** detail,PA signal is employed to trace the in vivo delivery with high spatial resolution,meanwhile the glutathione(GSH)-triggered dual-channel fluorescence response could real-timely monitor drug distribution and release without"blind spot".The results of in vivo dual-modal PA/NIR imaging have verified that BP_(20)-Cy-S-CPT displayed synergistic targeting(including passive,active,and activatable targeting)for tumor-specific delivery,and thereby executed CPT release in the tumor ***,our molecularly precise BP_(20)-Cy-S-CPT self-assemblies could make a breakthrough to spatiotemporally track the in vivo drug release profile,expanding the intelligent theranostic toolbox for precise cancer treatment.

摘要：The self-assembled phospholipid-or cytosolassociated multienzyme complexes constitute necessary components of the foundation of *** a proof of concept,metalcoordinated supramolecular nanogels (MCSGs) have been designed,with the self-assembly of di-lysine coordinated iron(Fe(Lys)_(2))-functionalized peptide gelators on the interface by an in situ amidation-induced protonation *** monoatomic and highly dispersed active centers of Fe(Lys)_(2) offered the nanogel mimics with excellent reaction rates due to the high density and nano compartmental structure similar to the natural matrix-associated multienzyme ***_(2)@MCSGs show both superoxide dismutase (SOD) activity and peroxidase (POD) activity,and the higher activities compared with the activity of free Fe(Lys);molecules can be *** loading the substrate 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate)(ABTS),SiO_(2)@MCSGs;can responsively convert O^(-)_(2) in the tumor microenvironment into H_(2)O_(2) intermediates and then tandem catalyze the oxidization of ABTS for contrast photoacoustic (PA) imaging of tumor by the SOD-POD mimic activity,showing their great potential as the efficient enzymatic agents for pathological theranostics.

摘要：开发近红外二区(NIR-Ⅱ)响应的纳米制剂用于NIR-Ⅱ光声成像(PAI)引导的光热治疗(PTT)为推进深层组织光诊疗的发展提供了机遇.尽管半导体聚合物纳米颗粒(SPNs)在NIR-ⅡPAI和PTT中展现出巨大的应用潜力,但其有限的光声/光热效能使得实现高效的体内光诊疗仍然是一个巨大的挑战.本工作中,我们提出了一种基于非共价键构象锁(NCL)的分子工程策略来优化SPN的NIR-Ⅱ光声/光热性能,以实现高效的体内光诊疗.NCL的引入有助于改善半导体聚合物主链的平面性,增强其捕光能力,从而提高NIR-Ⅱ光声/光热信号的输出.优化出的SPN3毒性低、尺寸合适、光物理性能好,不仅能被4T1癌细胞有效摄取并在NIR-Ⅱ光激发下杀死细胞,而且经全身给药后可通过NIR-ⅡPAI点亮肿瘤轮廓,进一步指导NIR-ⅡPTT的进行以实现高效的肿瘤热消融.因此本文的研究提供了一种独特的分子设计策略来放大SPN的NIR-Ⅱ光声/光热信号,最终实现活体高效光诊疗.