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Table 1 Chronological overview of experimental studies on radio-enhancement of fast ion radiation effects by high-Z compounds

From: Particle therapy and nanomedicine: state of art and research perspectives

Ion type

E

LET (keV/μm)

Dose rate (Gy/min)

Sample

Radio-enhancer

Data

Evidence of radical effects

Localisation

Refs./year

Helium

143 MeV/amu

2.24 (HIMAC)

4

pBr322 plasmid

PtTC complex

SSB/DSB

Yesa

–

Usami et al. (2005)

Carbon

276 MeV/amu

109 MeV/amu

13.4 (HIMAC)

25.6

7

6.2

pBr322 plasmid

PtTC complex

SSB/DSB

Yes

–

Usami et al. (2007)

Iron

400 MeV/amu

100 MeV/amu

200 (HIMAC)

550

–

pBr322 plasmid

PtTC complex

SSB/DSB

Yes

–

 

Carbon

290 MeV/amu

13 (HIMAC)

70

7

6.2

CHO-K-1 cells

PtTC complex

SF

Yes

Yes

Usami et al. (2008a)

Helium

150 MeV/amu

2 & 7 (HIMAC)

4

CHO-K-1 cells

PtTC complex

SF

Yes

Yes

 

Carbon

276 MeV/amu

13.4 (HIMAC)

4

pBr322 plasmid

PtNP-PAA 3 nm

 

Yes

–

Porcel et al. (2010)

Carbon

290 MeV/amu

13.2 (HIMAC)

110

7

pBr322 plasmid

PtNP-PAA 3 nm

 

Yes

–

 

Protons

40 MeV

1 (Pristine peak)

35 (Bragg Peak)

480

CT26 cells

AuNPs 2–13 nm

SF

–

–

Kim et al. (2010)

Protons

40 MeV

1 (Pristine peak)

35 (Bragg Peak)

480

CT26 cells

FeNPs 14 nm

SF

–

–

 

Protons

40 MeV

1 (Pristine peak)

35 (Bragg peak)

–

CT26 T in mice

AuNPs 2–13 nm

T growth/mice survival

–

–

 

Protons

80 MeV

–

4

NSA fibrocarcoma in mice

Cis-Pt

T growth/mice survival

–

Yes

Terakawa et al. (2011)

Protons

160 MeV

SOBP

–

DU 145 Prostate carcinoma cells

Phage plus AuNPs 44 nm

SF

–

–

Polf et al. (2011)

Helium

150 MeV/amu

2.3 (HIMAC)

4

pBr322 plasmid

PtNP-PAA 3 nm

SSB/DSB

Yes

–

Porcel et al. (2012)

Carbon

290 MeV/amu

13.2

110

(HIMAC)

7

pBr322 plasmid

PtNP-PAA 3 nm

SSB/DSB

Yes

–

 

Protons

45 MeV

Pristine Bragg Peak Entrance plateau

0.5–0.7

CT26 T in mice

AuNPs 14 nm

T uptake/T growth/Mice survival

Yes

–

Kim et al. (2012)

Protons

45 MeV

Pristine Bragg Peak Entrance plateau

0.5–0.7

CT26 T in mice

FeNPs 10.6 nm

T uptake/T growth/Mice survival

Yes

–

 

Carbon

62 MeV

290

 

HeLa

Glu-AuNPs 6 nm

 

–

–

Kaur et al. (2013)

Carbon

270 MeV/amu

13 (HIMAC)

7

pBr322 plasmid

GdBNP 3 nm

SSB/DSB

Yes

–

Porcel et al. (2014)

Helium

150 MeV/amu

2.3 (HIMAC)

4

pBr322 plasmid

GdBNP 3 nm

SSB/DSB

–

–

 

Carbon

270 MeV/amu

13

7

CHO

GdBNP 3 nm

SF

 

Yes

 

Protons

3 MeV

12

–

RT112

Citrate-AuNPs 50 nm

 

Yes

Yes

Jeynes et al. (2014)

Protons

2 MeV

10 and 25

1

A431

Amine PEG capped AuNPs 5 & 10 nm

SF

Yes

Yes

(Li et al. (2016)

Carbon

165 MeV/amu

70 (HIRFL)

0.4

HeLa

AuNPs 14 nm (1.5–15 μg/mL)

Viability, SF, cell cycle

Yes

Yes

Liu et al. (2015, 2016)

Protons

150 MeV

0.44

3.6

–

pBr322 plasmid

PtNP-PAA 3 nm

SSB/DSB

Yes

–

Schlathölter et al. (2016)

Protons

150 MeV

0.44

3.6

–

pBr322 plasmid

GdBNP 3 nm

SSB/DSB

Yes

–

 
  1. SSB/DSB stay for single/double strand breaks, while SF is survival fraction
  2. Studies at molecular scale (black), in vitro (blue) and in vivo (red) levels are reported. The method of LET measurements are not specified in the papers, but are usually determined on the basis of measurements performed with ionization chambers in water
  3. aYes means availability of data concerning the radical production and the NP localisation in cells. The absence of ticks is indicating the absence of data