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Magnetic resonance imaging and photothermal conversion properties of Gd‐C nanocomposites for interstitial lymphography
Author(s) -
Yao Yaqi,
Suo Lulu,
Liu Shien,
Zeng Wenxia,
Shan Jun,
Zhang Canying,
Wu Daxiong,
Shang Wei,
Zhu Haitao
Publication year - 2020
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.34418
Subject(s) - photothermal therapy , materials science , lymphatic system , nanocomposite , lymph , gadolinium , biomedical engineering , magnetic resonance imaging , lymph node , nuclear magnetic resonance , nanotechnology , radiology , medicine , pathology , physics , metallurgy
Dual‐functional agents for magnetic resonance imaging (MRI) guided photothermal therapy (PTT) of lymph cancer are highly desired. Signal enhancement, selectivity between lymphatic nodes/vessels and blood vessels, and photothermal conversion property are the criteria for such dual‐functional agent. In the current work, we demonstrated the potential of Gd‐C nanocomposites as dual‐functional agents for the MRI and PTT of lymph node cancer. Gd‐C nanocomposites were synthesized via a hydrothermal carbonization approach with gadolinium chloride as Gd source and citric acid (CA) as C source. The particle size of the nanocomposites ranges from 40 to 100 nm which is smaller than the intercellular space of lymphatic vessels but much larger than that of the blood vessels. The nanocomposites were successfully applied to the MRI of cervical lymph nodes of rabbits. The signal enhancement of the lymph nodes reached the maximum value of 434% at 10 min after injection, without displaying any blood vessel. The Gd‐C nanocomposites also exhibited strong photothermal conversion effect. Under the illumination of an 808 nm laser, the aqueous suspension containing 1.0 wt % Gd‐C nanocomposites gave a maximum temperature rise of 28.2 °C and a light utilization efficiency of 30.4%. The results indicate that Gd‐C nanocomposites have significant potential in MRI guided PTT of lymph cancer.