Citation: Huamei Zhang, Jingjing Liu, Mingyue Li, Shida Ma, Xucong Zhou, Aixia Meng, Weina Han, Jin Zhou. Imaging polarity changes in pneumonia and lung cancer using a lipid droplet-targeted near-infrared fluorescent probe[J]. Chinese Chemical Letters, ;2024, 35(12): 110020. doi: 10.1016/j.cclet.2024.110020 shu

Imaging polarity changes in pneumonia and lung cancer using a lipid droplet-targeted near-infrared fluorescent probe

Huamei Zhang ^{a, 1} ,
Jingjing Liu ^{b, 1} ,
Mingyue Li ^a ,
Shida Ma ^a ,
Xucong Zhou ^a ,
Aixia Meng ^a ,
Weina Han ^{a, *,} ,
Jin Zhou ^{a, *,}

a.
School of Pharmacy, School of Basic Medical Sciences, Shandong Second Medical University, Weifang 261053, China
b.
Department of Respiratory and Critical Care Medicine, Weifang People's Hospital (The First Affiliated Hospital of Shandong Second Medical University), Weifang 261041, China

starhwn@sdsmu.edu.cn

zhoujin@sdsmu.edu.cn

Received Date: 7 April 2024
Revised Date: 6 May 2024
Accepted Date: 15 May 2024
Available Online: 16 May 2024

Figures(5)

As the main organ of gas exchange, the lungs are susceptible to various exogenous attacks, and pneumonia is one of the major inflammatory diseases that threaten human health. Generally, pneumonia is a disease that occurs in the alveoli and respiratory bronchioles induced by pathogens and further causes local and systemic inflammatory responses. The development of pneumonia can bring various serious complications, including lung abscess, sepsis, meningitis, brain damage and hearing loss. Over the past few decades, the mortality rate of pneumonia patients has remained high. While lung cancer is another lung-related malignant tumors worldwide, with a low 5 year survival rate. Exploring the mechanisms of their occurrence and interaction between pneumonia and lung cancer is a challenging and meaningful task. The abnormalities of lipid droplets (LDs) polarity have been found strongly accompanied by many diseases, especially cancer, inflammation, and metabolic diseases. However, their exact role is not yet clear. Hence, it is significant to develop a novel detection method to observe the polarity changes of LDs, which would help to reveal the development process of diseases pneumonia and lung cancer. In this work, a new polarity-sensitive LDs-targeted near-infrared probe BFZ up to 712 nm was designed, according to the intramolecular charge transfer mechanism, which displayed high fluorescence intensity in low polarity while showing decreased fluorescence intensity in high-polarity conditions with a significant redshift. The BFZ was successfully applied to the change of LDs polarity in lipopolysaccharide (LPS)-stimulated A549 cells, and a mouse model of lung inflammation. It also tells the polarity differences between normal and tumor cells and between normal and tumor tissues. Moreover, the correlations between pneumonia and polarity changes were observed through the imaging experiments, which may provide an insightful method for the early diagnosis of pneumonia and lung cancer.
- Fluorescent probe,
- Lipid droplets,
- Polarity,
- Pneumonia,
- Lung cancer
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