Intercellular Communication Induction

2020 ◽  
Author(s):  
2019 ◽  
Vol 19 (6) ◽  
pp. 387-394 ◽  
Author(s):  
Li Xu ◽  
Long-Fei Wu ◽  
Fei-Yan Deng

Exosomes are 30-120nm long endocytic membrane-derived vesicles, which are secreted by various types of cells and stably present in body fluids, such as plasma, urine, saliva and breast milk. Exosomes participate in intercellular communication. Recently accumulative studies have suggested that exosomes may serve as novel biomarkers for disease diagnosis and prognosis. Herein, we reviewed the biological features of exosomes, technologies for exosome isolation and identification, as well as progress in exosomal biomarker identification, highlighting the relevance of exosome to human diseases and significance and great potential in translational medicine.


1999 ◽  
Vol 23 (4) ◽  
pp. 273-279 ◽  
Author(s):  
Hiroshi Yamasaki ◽  
Yasufumi Omori ◽  
Maria-Lucia Zaidan-Dagli ◽  
Nikolai Mironov ◽  
Marc Mesnil ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ryo Saga ◽  
Yusuke Matsuya ◽  
Rei Takahashi ◽  
Kazuki Hasegawa ◽  
Hiroyuki Date ◽  
...  

AbstractHyaluronan synthesis inhibitor 4-methylumbelliferone (4-MU) is a candidate of radiosensitizers which enables both anti-tumour and anti-metastasis effects in X-ray therapy. The curative effects under such 4-MU administration have been investigated in vitro; however, the radiosensitizing mechanisms remain unclear. Here, we investigated the radiosensitizing effects under 4-MU treatment from cell experiments and model estimations. We generated experimental surviving fractions of human fibrosarcoma cells (HT1080) after 4-MU treatment combined with X-ray irradiation. Meanwhilst, we also modelled the pharmacological effects of 4-MU treatment and theoretically analyzed the synergetic effects between 4-MU treatment and X-ray irradiation. The results show that the enhancement of cell killing by 4-MU treatment is the greatest in the intermediate dose range of around 4 Gy, which can be reproduced by considering intercellular communication (so called non-targeted effects) through the model analysis. As supposed to be the involvement of intercellular communication in radiosensitization, the oxidative stress level associated with reactive oxygen species (ROS), which leads to DNA damage induction, is significantly higher by the combination of 4-MU treatment and irradiation than only by X-ray irradiation, and the radiosensitization by 4-MU can be suppressed by the ROS inhibitors. These findings suggest that the synergetic effects between 4-MU treatment and irradiation are predominantly attributed to intercellular communication and provide more efficient tumour control than conventional X-ray therapy.


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