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The bacterial reverse mutation test uses amino acid-requiring strains of Salmonella typhimurium (S. typhimurium) and Escherichia coli (E. coli) to detect point mutations, which involve substitution, addition or deletion of one or a few DNA base pairs. The principle of this bacterial reverse mutation test is that it detects chemicals that induce mutations which revert mutations present in the tester strains and restore the functional capability of the bacteria to synthesize an essential amino acid. The revertant bacteria are detected by their ability to grow in the absence of the amino acid required by the parent tester strain.


Info
  • red font - indicates potential for CT code lists
  • green font - links to other domains
  • purple font - to be discussed


Expand
titleStudy 8325064, Report Table

Image Removed

Expand
titlets.xpt (trial summary, study level parameters)
  • Assumption: The intent of this dataset is to provide a summary of trial (study) information. This is not subject-level data. 

Row

STUDYID

ASSAYID

DOMAIN

TSSEQ

TSGRPID

TSPARMCD

TSPARM

TSVAL

TSVALNF

1

8325064AmesTS1
GLPTYPGood Laboratory Practice TypeFDA

2

8325064AmesTS2
GLPTYPGood Laboratory Practice TypeOECD

3

8325064AmesTS1
STSTDTCStudy Start Date2015-07-29

4

8325064AmesTS1
STITLEStudy Title

The Bacterial Reverse Mutation Test, Study 8325064-1


5

8325064AmesTS1
SNDIGVERSEND Implementation Guide VersionTOBACCO IMPLEMENTATION GUIDE VERSION 1.0

6

8325064AmesTS1
SNDCTVERSEND Controlled Terminology VersionSEND Terminology 2021-09-30

7

8325064AmesTS1
SSPONSORSponsor OrganizationExample Sponsor Inc.

8

8325064AmesTS1
SPREFIDSponsor's Study Reference ID
NOT APPLICABLE

9

8325064AmesTS11TSTFNAMTest Facility NameExample Tox Lab Name

10

8325064AmesTS11TSTFLOCTest Facility Location10 Somewhere Street, Montgomery, AL 10000

11

8325064AmesTS11TFCNTRYTest Facility CountryUSA

12

8325064AmesTS11STDIRStudy DirectorDr. R. Smith

13

8325064AmesTS1
GLPFLGLP FlagN

14

8325064AmesTS1
ASTDAssay StandardOECD Test No. 471 

15

8325064AmesTS1
ASTDVAssay Standard Version2020-06-29

16

8325064AmesTS1
SSTYPStudy TypeGENOTOXICITY IN VITRO

17

8325064AmesTS1
SSSTYPStudy Sub TypeBacterial Reverse Mutation Test

18

8325064AmesTS1
SPECIESSpeciesSalmonella 

19

8325064Ames


STRAINStrainSalmonella typhimurium, 

20

8325064AmesTS1
CELLLNCell Line (this would be Tester Strain for Ames)

TA98

(examples: H292, CHO, TK6.. etc.)


  • During CT definition/reviews will decide appropriate TXPARM and TXVAL; Treatment duration may be controlled;  For now, we just include good example values based on our experience
  • Assumption: The Trial Sets (TX domain provides the list of distinct sets of subjects having different experimental factors, treatment factors, inherent characteristics, or distinct sponsor designations as specified in the trial design.
    Expand
    titletx.xpt (trial sets)
    )
    • How do we handle "toxictoxic, no revertant colonies"?  (LAK will add 6 records with GTSTAT = NOT DONE, GTREASND = "TOO MUCH CYTOTOXICITY,"
    • Condition of background bacterial bacterial lawn?  Slight thinning, Very thin? - refer to SEND team's marked-up table.
      • new Test code of Cytotoxicity with GTORRES = S, V (controlled terms)
      • Each plate we would have one result record for Revertent count and another for the lawn evaluation (NORMAL, SLIGHT THINNING, VERY THIN)
    • When "-" in Mean, Std Dev, Fold Inc - refer to SEND team's marked-up table (GTSTAT = NOT DONE; variety of REASND)
    • What do we do for defined regimes (e.g. ISO Regime, Canadian ..) or all attributes should be listed as expected variables to allow for all including custom regimes (Puff volume, etc.)

                   

    Below the SETS shown in the TX table are rows A, F, I, and R (probably don't need R)         

    RowSTUDYIDASSAYIDDOMAINSETCD
    SET (what sponsor calls it)
    TXSEQTXPARMCDTXPARMTXVAL
    18325064AmesTX

    SetA (Row 1)



    METACTMetabolic Activation  (should there be two parms? Presence, type)?None
    28325064AmesTXSetA

    TRTDRTRGTreatment Duration target. (how do we show 3-6 hour range?  start/end, target and tolerance?, one text field not-analyzable)
    38325064AmesTXSetA

    TRTDRTOLTreatment Duration Tolerance
    48325064AmesTXSetA

    TRTDURUTreatment Duration Unit (this is for both TRTDURT, TRTDURTOL)
    58325064AmesTXSetA

    INTRVN

    name of the intervention article

    (Tobacco ProdA, Bleomycin or Cyclophosphamid A)

    DMSO
    68325064AmesTXSetA

    ITVTYPE

    type of intervention article

    choices of values:  product; negative control; positive control

    Vehicle Control
    78325064AmesTXSetA

    ITVCONCConcentration of intervention article0 (because no TA is used, this is just DMSO)
    88325064AmesTXSetA

    ITVCONCUConcentration Unitug/plate
    98325064AmesTXSetA

    STRAINStrain/SubstrainTA98
    108325064AmesTXSetA

    REGIMESmoking RegimeISO Regime
    ...









    8325064AmesTX

    SetF

    (row 6)



    METACTMetabolic Activation  (should there be two parms? Presence, type)?None

    8325064AmesTX

    SetF



    TRTDRTRGTreatment Duration target. (how do we show 3-6 hour range?  start/end, target and tolerance?, one text field not-analyzable)

    8325064AmesTXSetF

    TRTDRTOLTreatment Duration Tolerance

    8325064AmesTXSetF

    TRTDURUTreatment Duration Unit (this is for both TRTDURT, TRTDURTOL)

    8325064AmesTXSetF

    INTRVN

    name of the intervention article

    (Tobacco ProdA, Bleomycin or Cyclophosphamid A)

    TA1

    8325064AmesTXSetF

    ITVTYPE

    type of intervention article

    choices of values:  product; negative control; positive control

    Product

    8325064AmesTXSetF

    ITVCONCConcentration of intervention article500

    8325064AmesTXSetF

    ITVCONCUConcentration Unitug/plate

    8325064AmesTXSetF

    STRAINStrain/SubstrainTA98

    8325064AmesTXSetF

    REGIMESmoking RegimeISO Regime
    ...









    8325064AmesTX

    SetI(row 9)



    METACTMetabolic Activation  (should there be two parms? Presence, type)?None

    8325064AmesTXSetI

    TRTDRTRGTreatment Duration target. (how do we show 3-6 hour range?  start/end, target and tolerance?, one text field not-analyzable)

    8325064AmesTXSetI

    TRTDRTOLTreatment Duration Tolerance

    8325064AmesTXSetI

    TRTDURUTreatment Duration Unit (this is for both TRTDURT, TRTDURTOL)

    8325064AmesTXSetI

    INTRVN

    name of the intervention article

    (Tobacco ProdA, Bleomycin or Cyclophosphamid A)

    2-Nitrofluorine

    8325064AmesTXSetI

    ITVTYPE

    type of intervention article

    choices of values:  product; negative control; positive control

    Positive Control

    8325064AmesTXSetI

    ITVCONCConcentration of intervention article5

    8325064AmesTXSetI

    ITVCONCUConcentration Unitug/plate

    8325064AmesTXSetI

    STRAINStrain/SubstrainTA98

    8325064AmesTXSetI

    REGIMESmoking RegimeISO
    ...









    8325064AmesTX

    SetR

    (Row 18)



    METACTMetabolic Activation  (should there be two parms? Presence, type)?None

    8325064AmesTX

    SetR



    TRTDRTRGTreatment Duration target. (how do we show 3-6 hour range?  start/end, target and tolerance?, one text field not-analyzable)

    8325064AmesTXSetR

    TRTDRTOLTreatment Duration Tolerance

    8325064AmesTXSetR

    TRTDURUTreatment Duration Unit (this is for both TRTDURT, TRTDURTOL)

    8325064AmesTXSetR

    INTRVN

    name of the intervention article

    (Tobacco ProdA, Bleomycin or Cyclophosphamid A)

    4-Nitroquinoline-1-oxide

    8325064AmesTXSetR

    ITVTYPE

    type of intervention article

    choices of values:  product; negative control; positive control

    Positive Control

    8325064AmesTXSetR

    ITVCONCConcentration of intervention article2

    8325064AmesTXSetR

    ITVCONCUConcentration Unitug/plate

    8325064AmesTXSetR

    STRAINStrain/SubstrainTA98

    8325064AmesTXSetR

    REGIMESmoking RegimeISO
    ...
    Expand
    titlegt.xpt (similar to LB)

    Do we need GTMETHOD?

    ......
    RowSTUDYIDASSAYIDDOMAINTXSETCDPLTWLIDGTSEQGTTESTCDGTTESTGTORRESGTORRESUGTSTRESCGTSTRESNGTSTRESUGTDTCGTMETHOD
    18325064AmesGTSETA 0_11RPPRevertant Numbers Per Plate26
    2626

    2015-08-03

    INSTRUMENT COUNTED

    28325064AmesGTSETA 0_22RPPRevertant Numbers Per Plate35
    3535

    2015-08-03
    INSTRUMENT COUNTED
    38325064AmesGTSETA 0_33RPPRevertant Numbers Per Plate39
    3939

    2015-08-03
    INSTRUMENT COUNTED
    48325064AmesGTSETA 0_44RPPRevertant Numbers Per Plate35
    3535

    2015-08-03

    INSTRUMENT COUNTED

    58325064AmesGTSETA 0_55RPPRevertant Numbers Per Plate30
    3030
    2015-08-03INSTRUMENT COUNTED
    68325064AmesGTSETA ALL6RPPMEANMean of Revertant Numbers Per Plate33.0
    33.033.0

    INSTRUMENT COUNTED
    78325064AmesGTSETA ALL7RPPSTDDVStandard Deviation of Revertant Numbers Per Plate5.0
    5.05.0

    INSTRUMENT COUNTED

    ...

    8325064AmesGTSETF5_11RPPRevertant Numbers Per Plate8
    88

    MANUALLY COUNTED

    8325064AmesGTSETF 5_22RPPRevertant Numbers Per Plate10
    1010

    MANUALLY COUNTED

    8325064AmesGTSETF 5_33RPPRevertant Numbers Per Plate12
    1212

    MANUALLY COUNTED

    8325064AmesGTSETFALL6RPPMEANMean of Revertant Numbers Per Plate

    10.0



    10.0


    10.0






    8325064AmesGTSETF ALL7RPPSTDDVStandard Deviation of Revertant Numbers Per Plate2.0
    2.02.0



    8325064AmesGTSETF ALL8RPPFLDINCFold Increase of Revertant Numbers Per Plate0.3
    0.30.3



    8325064AmesGTSETI5_11RPPRevertant Numbers Per Plate1104
    11041104



    8325064AmesGTSETI5_22RPPRevertant Numbers Per Plate1037
    10371037



    8325064AmesGTSETI5_33RPPRevertant Numbers Per Plate971
    971971



    8325064AmesGTSETIALL6RPPMEANMean of Revertant Numbers Per Plate

    1037.3



    1037.3


    1037.3






    8325064AmesGTSETIALL7RPPSTDDVStandard Deviation of Revertant Numbers Per Plate66.5
    66.566.5



    8325064AmesGTSETIALL8RPPFLDINCFold Increase of Revertant Numbers Per Plate31.4
    31.431.4