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Diss Factsheets

Toxicological information

Genetic toxicity: in vitro

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Administrative data

Endpoint:
in vitro gene mutation study in bacteria
Remarks:
Type of genotoxicity: gene mutation
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Study period:
2002
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
GLP - Guideline study. According to the ECHA guidance document "Practical guide 6: How to report read-across and categories (March 2010)", the reliability was changed from RL1 to RL2 to reflect the fact that this study was conducted on a read-across substance.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 471 (Bacterial Reverse Mutation Assay)
Deviations:
no
Qualifier:
according to guideline
Guideline:
JAPAN: Guidelines for Screening Mutagenicity Testing Of Chemicals
Deviations:
no
GLP compliance:
yes
Type of assay:
bacterial reverse mutation assay

Test material

Constituent 1
Reference substance name:
Disodium succinate
EC Number:
205-778-7
EC Name:
Disodium succinate
Cas Number:
150-90-3
IUPAC Name:
disodium succinate
Details on test material:
- Name of test material (as cited in study report): succinic acid disodium
- Molecular weight (if other than submission substance): 162.05
- Physical state: white crystalline powder
- Analytical purity: 99.9%
- Stability: due to hygroscopic properties, moisture was increased over time
- Storage condition of test material: at room temperature in a sealed container with silica

Method

Target gene:
his operon (S. typhimurium), trp operon (E. coli)
Species / strain
Species / strain / cell type:
S. typhimurium TA 1535, TA 1537, TA 98, TA 100 and E. coli WP2
Metabolic activation:
with and without
Metabolic activation system:
cofactor-supplemented post-mitochondrial fraction (S9 mix), prepared from the livers of rats treated with phenobarbital and 5,6-benzoflavone
Test concentrations with justification for top dose:
Experiment 1: 0.305, 1.22, 4.88, 19.5, 78.1, 313, 1250 and 5000 µg/plate with and without metabolic activation
Experiment 2: 156, 313, 625, 1250, 2500 and 5000 µg/plate with and without metabolic activation
Vehicle / solvent:
- Vehicle(s)/solvent(s) used: physiol. saline
Controlsopen allclose all
Untreated negative controls:
no
Negative solvent / vehicle controls:
yes
Remarks:
physiol. saline
True negative controls:
no
Positive controls:
yes
Positive control substance:
other: -S9 mix; 2-(2-Furyl)-3-(5-nitro-2-furyl) acrylamide (TA100, TA98 and WP2 uvrA), Sodium azide (TA1535) and 2-Methoxy-6-chloro-9-[3-(2-chloroethyl)-aminopropylamino] acridine 2HCl (TA1537)
Untreated negative controls:
no
Negative solvent / vehicle controls:
yes
Remarks:
physiol. saline (5000 µg/plate)
True negative controls:
no
Positive controls:
yes
Positive control substance:
other: +S9 mix; Benzo[a]pyrene (TA100, TA98, TA1537) and 2-Aminoanthracene (TA1535 and WP2 uvrA)
Details on test system and experimental conditions:
METHOD OF APPLICATION: preincubation

DURATION
- Preincubation period: 20 min
- Exposure duration: 48 h

NUMBER OF REPLICATIONS: 3 replications each in 2 independent experiments

DETERMINATION OF CYTOTOXICITY
- Method: relative total growth
Evaluation criteria:
A result was considered positive if the following conditions were met: A two-fold increase in the number of revertants in the test plates compared with the negative control plates and evidence of a dose-response relationship.
Statistics:
Mean values were calculated and no statistical analysis was conducted.

Results and discussion

Test results
Species / strain:
S. typhimurium TA 1535, TA 1537, TA 98, TA 100 and E. coli WP2
Metabolic activation:
with and without
Genotoxicity:
negative
Cytotoxicity / choice of top concentrations:
no cytotoxicity nor precipitates, but tested up to recommended limit concentrations
Vehicle controls validity:
valid
Untreated negative controls validity:
not examined
Positive controls validity:
valid
Additional information on results:
TEST-SPECIFIC CONFOUNDING FACTORS
- Precipitation: No deposition of crystals/precipitate was observed.

RANGE-FINDING/SCREENING STUDIES:
According to the authors, Experiment 1 was a range-finding test. However, under the test conditions described, it can be considered as an independent experiment.

ADDITIONAL INFORMATION ON CYTOTOXICITY:
No cytotoxicity (growth inhibition) was observed up to 5000 µg/plate in the presence and absence of metabolic activation.
Remarks on result:
other: all strains/cell types tested
Remarks:
Migrated from field 'Test system'.

Any other information on results incl. tables

Table 1. Results of Experiment 1.

 

Number of revertant colonies/plate (mean value rounded to the nearest whole numer)

EXPERIMENT 1

S9-Mix

Without

 

Base-pair substitution type

Frameshift type

Test item (µg/plate)

TA 100

TA 1535

WPA uvrA

TA 98

TA 1537

Physiol. saline

113

109

113

(112)

11

15

15

(14)

28

23

27

(26)

24

21

20

(22)

12

12

13

(12)

0.305

113

108

121

(114)

11

16

11

(13)

21

24

23

(23)

20

20

21

(20)

11

11

15

(12)

1.22

110

102

100

(104)

16

11

13

(13)

25

31

23

(26)

28

24

21

(24)

11

16

15

(14)

4.88

105

134

114

(118)

11

15

15

(14)

25

28

27

(27)

31

23

21

(25)

15

16

17

(16)

19.5

100

126

114

(113)

15

15

15

(15)

21

27

24

(24)

21

27

20

(23)

16

12

12

(13)

78.1

110

101

105

(105)

9

11

11

(10)

29

29

25

(28)

23

20

21

(21)

15

13

16

(15)

313

104

117

125

(115)

17

12

16

(15)

24

23

27

(25)

23

25

20

(23)

13

13

11

(12)

1250

112

105

110

(109)

11

11

11

(11)

29

25

23

(26)

21

24

28

(24)

12

15

16

(14)

5000

106

121

102

(110)

12

12

11

(12)

28

27

24

(26)

21

24

28

(24)

12

15

16

(14)

AF-2 (0.01)

890

815

862

(856)

-

132

157

158

(149)

-

-

AF-2 (0.10)

-

-

-

491

427

409

(442)

-

SAZ (0.50)

-

359

392

362

(371)

-

-

-

ICR-191 (1.00)

-

-

-

-

1790

1809

1815

(1805)

S9-Mix

With

Test item (µg/plate)

TA 100

TA 1535

WPA uvrA

TA 98

TA 1537

Physiol. saline

118

122

118

(119)

11

13

12

(12)

36

27

33

(32)

35

41

33

(36)

21

16

13

(14)

0.305

113

130

109

(117)

15

15

11

(14)

31

27

29

(29)

35

33

28

(32)

19

12

12

(14)

1.22

113

104

102

(106)

12

11

11

(11)

33

31

31

(32)

27

31

31

(30)

16

16

11

(14)

4.88

126

128

134

(129)

11

15

17

(14)

25

32

35

(31)

33

33

33

(33)

11

16

11

(13)

19.5

113

109

117

(113)

13

11

12

(12)

36

35

32

(34)

37

40

39

(39)

11

16

16

(14)

78.1

129

120

100

(116)

11

12

15

(13)

28

28

31

(29)

28

37

36

(34)

16

11

15

(14)

313

113

100

118

(110)

11

13

16

(13)

32

27

29

(29)

33

27

31

(30)

12

16

13

(14)

1250

136

117

110

(121)

11

16

12

(13)

24

24

28

(25)

33

29

28

(30)

12

16

17

(15)

5000

113

121

113

(116)

13

11

17

(14)

32

31

25

(29)

36

33

28

(32)

16

15

17

(16)

B[a]P (5.00)

818

811

904

(844)

-

-

241

239

217

(232)

92

89

80

(87)

2AA (2.00)

-

217

196

206

(206)

 

-

-

2AA (10.0)

 

 

404

491

411

(435)

 

 

 

AF-2: 2-(2-Furyl)-3-(5-nitro-2-furyl)acrylamide

SAZ: Sodium azide

ICR-191: 2-Methoxy-6-chloro-9-[3-(2-chloroethyl)-aminopropylamino]acridine.2HCl

B[a]P: Benzo[a]pyrene

2AA: 2-Aminoanthracene

 

 

Table 2. Results of Experiment 2.

 

Number of revertant colonies/plate (mean value rounded to the nearest whole numer)

EXPERIMENT 2

S9-Mix

Without

 

Base-pair substitution type

Frameshift type

Test item (µg/plate)

TA 100

TA 1535

WPA uvrA

TA 98

TA 1537

Physiol. saline

118

114

101

(111)

11

11

16

(13)

28

27

24

(26)

21

24

20

(22)

15

11

11

(12)

156

109

104

113

(109)

15

11

15

(14)

25

21

25

(24)

21

21

21

(21)

11

12

15

(13)

313

114

112

109

(112)

13

12

13

(13)

29

24

21

(25)

19

19

23

(20)

12

13

11

(12)

625

108

104

106

(106)

11

13

12

(12)

29

21

25

(25)

20

19

21

(20)

11

15

12

(13)

1250

112

110

119

(113)

12

12

16

(13)

25

28

23

(25)

21

21

23

(22)

13

12

17

(14)

2500

105

109

109

(108)

13

13

11

(12)

25

20

27

(24)

20

25

24

(23)

16

11

16

(14)

5000

108

118

106

(110)

15

13

15

(14)

31

24

24

(26)

25

29

20

(25)

16

12

13

(14)

AF-2 (0.01)

853

859

819

(844)

-

145

145

168

(153)

-

-

AF-2 (0.10)

-

-

-

487

485

468

(480)

-

SAZ (0.50)

-

384

408

399

(397)

-

-

-

ICR-191 (1.00)

-

-

-

-

1803

1810

1825

(1813)

S9-Mix

With

Test item (µg/plate)

TA 100

TA 1535

WPA uvrA

TA 98

TA 1537

Physiol. saline

112

102

124

(113)

17

11

12

(13)

24

27

24

(25)

35

33

31

(33)

12

16

16

(15)

156

121

130

109

(120)

16

12

12

(13)

29

29

25

(28)

32

35

39

(35)

17

13

12

(14)

313

101

110

128

(113)

11

15

11

(12)

21

25

25

(24)

27

31

39

(32)

19

13

13

(15)

625

121

112

124

(119)

12

19

13

(15)

28

23

27

(26)

33

29

28

(30)

12

16

12

(13)

1250

114

109

134

(119)

12

13

11

(12)

25

24

29

(26)

36

37

32

(35)

11

12

16

(13)

2500

125

100

120

(115)

11

13

11

(12)

29

29

25

(28)

33

35

28

(32)

17

13

13

(14)

5000

132

101

104

(112)

12

13

12

(12)

20

29

24

(24)

27

31

35

(31)

16

19

13

(16)

B[a]P (5.00)

907

815

894

(872)

-

-

250

251

235

(245)

97

88

88

(91)

2AA (2.00)

-

157

170

196

(174)

-

-

-

2AA (10.0)

-

-

485

402

398

(428)

-

-

 

AF-2: 2-(2-Furyl)-3-(5-nitro-2-furyl)acrylamide

SAZ: Sodium azide

ICR-191: 2-Methoxy-6-chloro-9-[3-(2-chloroethyl)-aminopropylamino]acridine.2HCl

B[a]P: Benzo[a]pyrene

2AA: 2-Aminoanthracene

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information):
negative