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This example shows a report table, trial design,

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and results data for the in vitro neutral red uptake (NRU) cytotoxicity assay
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in example study 123.
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titleSample from Report Table

The following shows example data for study 123 in a report table. This report includes summary statistics (i.e., average, standard deviation, coefficient variation) for each plate and an EC50

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value for the entire assay. In the table below, the light grey shading for plate 1 are values from wells that do not contain the NHK cells. The dark grey shading represents the column and row location within the 96-well plate, and in this example the applicant chose to use these column and row locations to assign their REFID values in the RELREF dataset and GT dataset.  

For brevity, the datasets in this example are not comprehensive but are intended to demonstrate a range of proper use. 


Neutral Red Cytotoxicity Assay Results (Relative Absorbance Data)




Sample ID

Smoke Regime

Replicate Number

Plate Number



Relative Assay Plate Absorbance Readings





Cigarette Smoke Condensate (µg/mL) 

SLS (µg/mL)


EC50 (µg/ml)

Well Column:

1

2

3

4

5

6

7

8

9

10

11

12


Well 
Row:

0

10

50

75

100

120

140

160

200

110

200

0



030001

Medium

1

1

A

0.046*

0.046*0.039*0.012*0.030*0.003*0.057*0.032*0.003*0.050*0.044*

0.040*



030001

Medium

1

1

B

0.048*

107

77.7

65.7

30.2

15.6

9.79

5.41

2.49

8.09

0.791

0.014*



030001

Medium

1

1

C

0.005*

98.6

77.4

57.7

35.8

8.09

7.36

3.22

0.791

6.38

0.061

0.050*



030001

Medium

1

1

D

0.049*

94.9

81.5

38.2

31.2

7.60

5.17

3.22

0.791

5.17

0.304

0.017*



030001

Medium

1

1

E

0.047*

111

78.1

64.5

32.9

8.82

5.90

2.74

1.28

10.3

0.547

0.011*



030001

Medium

1

1

F

0.032*

96.6

76.2

48.0

26.8

7.84

4.20

2.74

1.52

8.09

4.93

0.022*



030001

Medium

1

1

G

0.044*

105

77.9

58.2

28.3

8.09

4.68

1.76

0.547

8.57

1.76

0.056*



030001

Medium

1

1

H

0.056*

0.013*0.040*0.008*0.013*0.002*0.029*0.018*0.006*0.016*0.024*

0.046*


Average


101

78.2

54.5

29.9

9.70

6.17

3.37

1.19

8.94

1.22



Std. Dev.


6

2.9

9.4

3.6

2.95

2.19

1.12

0.72

2.72

1.58



Coeff. Var.


5.8

3.6

17.2

11.9

30.4

35.5

33.1

61.0

30.5

129.9



*media without cells















030001

Medium

1

2

A


93.4

74.0

56.0

35.1

11.8

8.70

5.10

1.98

5.34

1.02




030001

Medium

1

2

B


102

75.2

53.3

35.1

11.8

7.74

5.58

3.66

5.34

1.02




030001

Medium

1

2

C


107

79.0

55.0

26.5

10.1

6.06

3.66

1.74

7.02

0.780




030001

Medium

1

2

D


104

80.2

55.3

29.8

8.94

3.90

3.66

1.50

6.30

0.780




030001

Medium

1

2

E


101

75.7

54.1

26.7

4.86

4.38

1.26

1.02

6.30

1.02




030001

Medium

1

2

F


110

85.7

67.7

26.0

5.34

4.62

3.42

1.50

6.30

0.540




030001

Medium

1

2

G


104

77.8

64.9

27.7

8.22

3.18

2.46

1.02

6.30

0.780




030001

Medium

1

2

H


103

71.6

58.9

25.5

9.42

4.14

3.90

1.26

4.38

0.780



Average


103

77.4

58.1

29.0

8.82

5.34

3.63

1.71

5.91

0.840



Std. Dev.


5

4.4

5.3

4.0

2.63

1.97

1.37

0.86

0.83

0.170



Coeff. Var.


4.6

5.6

9.2

13.6

29.8

36.9

37.6

50.0

14.1

20.2



EC50 (µg/ml). Effective concentration at 50% cytotoxicity.  (using a specific sigmoidal equation = model). 













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