| Autor: |
Kumar A; Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan ROC. fangang@ess.nthu.edu.tw., Goudar VS; Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan ROC. fangang@ess.nthu.edu.tw., Kaladharan K; Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan ROC. fangang@ess.nthu.edu.tw., Santra TS; Department of Engineering Design, Indian Institute of Technology Madras, Chennai, 600036, India. santra.tuhin@gmail.com., Tseng FG; Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan ROC. fangang@ess.nthu.edu.tw.; Institute of Nano Engineering and Microsystems, National Tsing Hua University, Hsinchu, 30013, Taiwan ROC.; Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan ROC.; Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu, 30013, Taiwan, Republic of China. |
| Abstrakt: |
Temperature governs the reactivity of a wide range of biomolecules in the cellular environment dynamically. The complex cellular pathways and molecules in solid tumors substantially produce temperature gradients in the tumor microenvironment (TME). Hence, visualization of these temperature gradients at the cellular level would give physiologically relevant spatio-temporal information about solid tumors. This study used fluorescent polymeric nano-thermometers (FPNTs) to measure the intratumor temperature in co-cultured 3D tumor spheroids. A temperature-sensitive rhodamine-B dye and Pluronic F-127 were conjugated through hydrophobic and hydrophobic interactions and then cross-linked with urea-paraformaldehyde resins to form the FPNTs. The characterization results exhibit monodisperse nanoparticles (166 ± 10 nm) with persistent fluorescence. The FPNTs exhibit a linear response with a wide temperature sensing range (25-100 °C) and are stable toward pH, ionic strength, and oxidative stress. FPNTs were utilized to monitor the temperature gradient in co-cultured 3D tumor spheroids and the temperature difference between the core (34.9 °C) and the periphery (37.8 °C) was 2.9 °C. This investigation demonstrates that the FPNTs have great stability, biocompatibility, and high intensity in a biological medium. The usage of FPNTs as a multifunctional adjuvant may demonstrate the dynamics of the TME and they may be suitable candidates to examine thermoregulation in tumor spheroids. |
