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代谢应激向肝脏炎症和纤维化的转化；其三，在遗 调控肝细胞脂质命运、能量分配与应激响应的重要
传易感人群中，将 PNPLA3、HSD17B13 等信息纳入 代谢枢纽。该结构通过协调脂滴动员、脂肪酸氧化
精准分层和临床试验设计。总体而言，脂滴⁃线粒体 及线粒体稳态，在肝脏代谢损伤和HIRI中均发挥关
接触点真正的转化价值，并非把它当作一个单独的 键作用：在代谢应激早期，其适度重塑有助于脂质
治疗对象，而更可能在于把它作为连接脂滴生物 缓冲和能量适应；而在持续脂质过载或再灌注氧化
学、线粒体生物学和肝脏精准医学的“机制平台”。 打击背景下，接触点耦联失衡则可能推动脂毒性放
未来随着活细胞成像、邻近标记、多组学整合和遗 大、线粒体损伤及炎症⁃纤维化级联反应。
传分层研究的推进，这一脂滴⁃线粒体接触点有望从 当前该领域仍面临若干关键挑战。其一，针对
基础细胞器互作概念，逐步发展为肝脏代谢损伤和 肝脏疾病尤其是 HIRI 中接触点动态变化的直接原
HIRI研究的关键转化入口（表2）。 位证据仍相对不足；其二，不同研究中对 PDM 及接
触位点的界定尚未完全统一；其三，现有技术在保
6 结 语
留原位结构、解析界面组成及建立因果功能联系方
脂滴⁃线粒体接触点并非单纯的超微结构，而是 面仍存在局限。因此，未来研究需要进一步整合活

表2 脂滴⁃线粒体接触点研究的主要技术及其优势与局限
Table 2 Advantages and limitations of main technology on lipid droplet mitochondrial contact point research

Technical Represent Representative
Main purpose Advantange Main limitation
category technology references
Ultrastructural TEM，CLEM， Directly observe the spa⁃ High resolution，pro⁃ Difficult to reflect dynamic ［42］
observation cryo⁃ET tial proximity and contact viding morphological processes；sample fixation
morphology between lipid evidence of contact may introduce artifacts
droplets and mitochondria existence
Living cells and Super ⁃ resolution Observation of contact Can track changes in Resolution and quantitative ［42-44］
super ⁃ resolu⁃ microscopy formation， dissociation，contact sites in living standards are still limited，
tion imaging FABCON and dynamic remodeling cells，emphasizing tem⁃ and the results are suscepti⁃
poral sequence ble to labeling strategies
Quantitative ContactJ Quantify contact area，fre⁃ Improve flux and re⁃ Dependent on image quali⁃ ［43］
analysis of im⁃ quency，and duration peatability to make the ty，threshold setting，and la⁃
ages “contact phenotype” beling accuracy
statistically analyzable
Separation and Density gradient Enrich interface related Interface related mole⁃ Mechanical shearing can ea⁃ ［45-46］
enrichment centrifugation mitochondrial or lipid dro⁃ cules can be studied sily damage the in⁃situ con⁃
strategy and PDM/LD re⁃ plet components for subs⁃ from the perspectives tact；it may also cause false
lated mitochon⁃ equent proteomics，lipido⁃ of composition and fun⁃ positive co⁃enrichment sets
drial separation mics，and respiratory fun⁃ ction
ction analysis
Adjacent mar ⁃ APEX2， Capture protein profiles More suitable for ana⁃ Strict negative/spatial con⁃ ［47-50］
kers and inter ⁃ Contact⁃ID， adjacent to contact sites lyzing“interface com⁃ trol is required，and indivi⁃
face protein ca ⁃ Split⁃TurboID， under in⁃situ conditions ponents”，which helps dual results cannot replace
pture CsFiND screen key tethering functional validation
and regulatory mole⁃
cules
Multi evidence Imaging+separa⁃ Establish a closed ⁃ loop The most effective way Complex experimental de⁃ ［51-52］
integration veri⁃ tion and enrich⁃ evidence chain of“struc⁃ to enhance the strength sign，high technical thresh⁃
fication ment + adjacent ture composition func⁃ of causal inference and old，and high requirements
labeling + func⁃ tion” avoid equating“co⁃lo⁃ for sample quality
tional detection calization”with“func⁃
tional coupling”