Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (4): 670.doi: 10.7503/cjcu20190715
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PAN Guoyong1,LI Yawen1,MA Lijun1,MA Yufan1,AI Wenting1,WANG Zhenguo1,HOU Xinhui1,Grigory V·Zyryanov2,3,WANG Zhuo1,*()
Received:
2019-12-30
Online:
2020-04-10
Published:
2020-02-26
Contact:
Zhuo WANG
E-mail:wangzhuo77@mail.buct.edu.cn
Supported by:
CLC Number:
TrendMD:
PAN Guoyong,LI Yawen,MA Lijun,MA Yufan,AI Wenting,WANG Zhenguo,HOU Xinhui,Grigory V·Zyryanov,WANG Zhuo. New Semiconducting Polymer Nanoparticles for Antibacterial Agent by the Synergetic Effect of Positive Charge and Photothermal Conversion[J]. Chem. J. Chinese Universities, 2020, 41(4): 670.
Fig.3 Characterization and photothermal activity of materials(A) UV-Vis absorption spectra of SP-PPh3 and SP-PPh3 NPs; (B) DLS and TEM image(inset) of SP-PPh3 NPs; (C) temperature elevation of SP-PPh3 NPs aqueous solution(10, 15, 20, 30 μg/mL) and water under 808 nm laser(1.0 W/cm2); (D) temperature change of SP-PPh3 NPs aqueous solution(20 μg/mL) under irradiation of 808 nm laser(1.0 W/cm2) and turn off laser follow by natural cooling; (E) time-dependent natural logarithm of the temperature of SP-PPh3 NPs during the natural cooling after 16 min; (F) cyclic heating curve of SP-PPh3 NPs(20 μg/mL) under laser irradiation for five circles.
Fig.5 In vitro antibacterial activity evaluation and SEM images(A) Photographs of bacterial colony formation in the presence of E. coli(A1—A4) and S. aureus(A5—A8). (A1) PBS; (A2) laser; (A3) SP-PPh3 NPs; (A4) SP-PPh3 NPs+laser; (A5) PBS; (A6) laser; (A7) SP-PPh3 NPs; (A8) SP-PPh3 NPs+laser. (B) The relative bacterial viability of the control group(a), the laser group(b), the SP-PPh3 NPs group(c), the SP-PPh3 NPs+laser group(d). The concentration of SP-PPh3 NPs is 20 μg/mL and 808 nm laser power is 1.0 W/cm2. (C) SEM images of E. coli(C1—C3) and S. aureus(C4—C6) contacting with control(C1, C4), 20 μg/mL SP-PPh3 NPs(C2, C5), SP-PPh3 NPs+laser(C3, C6). The 808 nm laser power is 1.0 W/cm2.
Fig.6 Cytotoxicity and mice model experiments(A) Photographs of wounds in mice treated with PBS(control), SP-PPh3 NPs and SP-PPh3 NPs+laser on days 0, 3, 6, 9, 12; (B) IR thermal images of the wound treated without SP-PPh3 NPs and with SP-PPh3 NPs respectively under the laser irradiation(808 nm, 1.5 W/cm2); (C) cytotoxicity of SP-PPh3 NPs(10, 20, 30, 40, 50 μg/mL); (D) wounds area value on day 0, 3, 6, 9, and 12 during antibacterial therapy; (E) the body mass of mice treated with PBS(control), SP-PPh3 NPs and SP-PPh3 NPs+laser; (F) analysis of liver function in mice after 12 d by blood, including alanine aminotransferase(a, U/L), aspartate aminotransferase(b, U/L), alkaline phosphatase(c, U/L), total protein(d, g/L), albumin(e, g/L).
Fig.7 H&E staining analysis of skin and major organs(A) H & E staining slices of wound skin tissue on days 3, 6, 9, and 12; (B) mouse organ H & E staining sections(heart, liver, spleen, lung and kidney) of the control group and the SP-PPh3 NPs treated group.
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