Microphysiological systems(MPS)are advanced in vitro platforms engineered to replicate in vivo conditions forstudying human biology,disease mechanisms,and drug responses with greater physiological relevance.Fluorescen...Microphysiological systems(MPS)are advanced in vitro platforms engineered to replicate in vivo conditions forstudying human biology,disease mechanisms,and drug responses with greater physiological relevance.Fluorescencesensing is widely used as a functional readout in MPS due to its high sensitivity,selectivity,and stability.However,conventional fluorescence sensing systems often rely on bulky instrumentation with limited integration,whichrestricts continuous in situ monitoring,scalable high-throughput analysis,and spatially resolved investigation in multiorgan-on-a-chip models.To address these limitations,we present a highly miniaturized,fully integrated optical systemwith a 1 mm2 footprint,enabling continuous in situ fluorescence monitoring of three-dimensional microtissues inclose proximity.The system integrates microscale illumination and sensing units for fluorescence excitation andselective detection,an optical element for guided light propagation,and a microcage for mechanical confinement ofmicrotissues.To demonstrate its capabilities,we integrated the miniaturized optical system with an MPS-relevantplatform to monitor fluorescence signals in transgenic mouse pancreatic islets expressing genetically encoded calciumindicators.The integrated platform enables real-time,continuous monitoring of islet responses to potassium chloridestimulation and tracking of calcium oscillations for over two hours,providing valuable information about thefunctional status of the pancreatic islets.Our work enhances the analytical capabilities of MPS through the integrationof miniaturized on-chip quantitative assessment tools,enabling precise,in situ,and continuous monitoring ofbiological activities in close proximity.展开更多
As a powerful tool to advance drug discovery,molecular imaging may provide new insights into the process of drug effect and therapy at cellular and molecular levels.When compared with other detection methods,fluoresce...As a powerful tool to advance drug discovery,molecular imaging may provide new insights into the process of drug effect and therapy at cellular and molecular levels.When compared with other detection methods,fluorescence-based strategies are highly attractive and can be used to illuminate pathways of drugs’transport,with multi-color capacity,high specificity and good sensitivity.The conjugates of fluorescent molecules and therapeutic agents create exciting avenues for real-time monitoring of drug delivery and distribution,both in vitro and in vivo.In this short review,we discuss recent developments of small molecule-based fluorophore-drug conjugates,including non-cleavable and cleavable ones,that are capable of visualizing drug delivery.展开更多
A colorimetric and fluorescent sensor for trace water in methanol has been designed and characterized, which is a kind of aluminium-Schiff base coordination complex derived from diaminomaleonitrile. The fluorescence p...A colorimetric and fluorescent sensor for trace water in methanol has been designed and characterized, which is a kind of aluminium-Schiff base coordination complex derived from diaminomaleonitrile. The fluorescence properties of this complex have been studied based on excited state intramolecular proton transfer (ESIPT) and intramolecular charge transfer (ICT) mechanism. The fluorescent emission of AI-L complex can be quenched by 0.1% water and distinguished by naked eyes. The detection limitation is 0.01% recognized by fluorescence spectra.展开更多
基金supported by the Swedish Foundation for Strategic Research(SSF Grant project no.RMX18-0066)The Family Erling-Persson Foundation,The Jonas&Christina af Jochnick Foundation,ERC-2018-AdG 834860-EYELETSThe Swedish Research Council.H.K.acknowledges funding from the Wenner-Gren foundation(UPD2021-0185)。
摘要Microphysiological systems(MPS)are advanced in vitro platforms engineered to replicate in vivo conditions forstudying human biology,disease mechanisms,and drug responses with greater physiological relevance.Fluorescencesensing is widely used as a functional readout in MPS due to its high sensitivity,selectivity,and stability.However,conventional fluorescence sensing systems often rely on bulky instrumentation with limited integration,whichrestricts continuous in situ monitoring,scalable high-throughput analysis,and spatially resolved investigation in multiorgan-on-a-chip models.To address these limitations,we present a highly miniaturized,fully integrated optical systemwith a 1 mm2 footprint,enabling continuous in situ fluorescence monitoring of three-dimensional microtissues inclose proximity.The system integrates microscale illumination and sensing units for fluorescence excitation andselective detection,an optical element for guided light propagation,and a microcage for mechanical confinement ofmicrotissues.To demonstrate its capabilities,we integrated the miniaturized optical system with an MPS-relevantplatform to monitor fluorescence signals in transgenic mouse pancreatic islets expressing genetically encoded calciumindicators.The integrated platform enables real-time,continuous monitoring of islet responses to potassium chloridestimulation and tracking of calcium oscillations for over two hours,providing valuable information about thefunctional status of the pancreatic islets.Our work enhances the analytical capabilities of MPS through the integrationof miniaturized on-chip quantitative assessment tools,enabling precise,in situ,and continuous monitoring ofbiological activities in close proximity.
基金This work was financially supported by the National Natural Science Foundation of China(21708034,21877100,81903574)Fundamental Research Funds for the Provincial Universities of Zhejiang(RF-B2019003).
摘要As a powerful tool to advance drug discovery,molecular imaging may provide new insights into the process of drug effect and therapy at cellular and molecular levels.When compared with other detection methods,fluorescence-based strategies are highly attractive and can be used to illuminate pathways of drugs’transport,with multi-color capacity,high specificity and good sensitivity.The conjugates of fluorescent molecules and therapeutic agents create exciting avenues for real-time monitoring of drug delivery and distribution,both in vitro and in vivo.In this short review,we discuss recent developments of small molecule-based fluorophore-drug conjugates,including non-cleavable and cleavable ones,that are capable of visualizing drug delivery.
摘要A colorimetric and fluorescent sensor for trace water in methanol has been designed and characterized, which is a kind of aluminium-Schiff base coordination complex derived from diaminomaleonitrile. The fluorescence properties of this complex have been studied based on excited state intramolecular proton transfer (ESIPT) and intramolecular charge transfer (ICT) mechanism. The fluorescent emission of AI-L complex can be quenched by 0.1% water and distinguished by naked eyes. The detection limitation is 0.01% recognized by fluorescence spectra.