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硫化氢荧光探针的制备及其在生物医学成像中的应用 Title:PreparationofHydrogenSulfideFluorescentProbesandTheirApplicationsinBiomedicalImaging Abstract: Hydrogensulfide(H2S)isanimportantgasotransmitterinvolvedinvariousphysiologicalandpathologicalprocessesinthehumanbody.ThedevelopmentoffluorescentprobesforthedetectionandimagingofH2Shasattractedsignificantattentionduetotheirpotentialapplicationsinbiomedicalresearch.ThispaperdiscussesthepreparationmethodsforH2Sfluorescentprobesandtheirpotentialapplicationsinbiomedicalimaging. 1.Introduction 1.1Background 1.2Significance 2.HydrogenSulfide 2.1PhysiologicalandPathologicalFunctions 2.2DetectionandImagingMethods 3.DesignPrinciplesofH2SFluorescentProbes 3.1ReactionMechanisms 3.2FluorophoreSelection 3.3ProbeDesignStrategies 4.PreparationTechniquesforH2SFluorescentProbes 4.1OrganicSynthesis 4.2BioconjugationMethods 4.3Nanomaterial-BasedProbes 5.ApplicationsofH2SFluorescentProbesinBiomedicalImaging 5.1CellularImaging 5.2TissueImaging 5.3InVivoImaging 6.ChallengesandFuturePerspectives 6.1SelectivityandSensitivity 6.2ToxicityandBiocompatibility 6.3TargetedImaging 7.Conclusion 1.Introduction 1.1Background Hydrogensulfide(H2S)isacolorlessgaswithastrongrotteneggodor.Despiteitsunpleasantsmell,H2Shasbeenfoundtoplaycrucialrolesinnumerousphysiologicalandpathologicalprocesses,includingvasodilation,inflammation,apoptosis,andneuroprotection.Inrecentyears,H2Shasemergedasanovelgasotransmitter,attractingsignificantinterestamongresearchersinthebiomedicalfield. 1.2Significance ThedevelopmentoffluorescentprobesforthedetectionandimagingofH2Shasbecomeahighlyactiveareaofresearch.Theseprobesenablereal-timemonitoringofH2Slevelsinlivingsystems,offeringvaluableinsightsintoitsbiologicalfunctions.Moreover,H2SfluorescentprobeshavepotentialapplicationsindiagnosingH2S-relateddiseasesandevaluatingtheefficacyofH2S-basedtherapies. 2.HydrogenSulfide 2.1PhysiologicalandPathologicalFunctions H2Sisendogenouslyproducedinthehumanbodybyenzymessuchascystathionineγ-lyase(CSE)andcystathionineβ-syn