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Diss Factsheets

Toxicological information

Skin irritation / corrosion

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Administrative data

Endpoint:
skin irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Nov 2013 - March 2104
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2014
Report date:
2014

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
Qualifier:
according to guideline
Guideline:
EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)
Qualifier:
according to guideline
Guideline:
EPA OPPTS 870.2500 (Acute Dermal Irritation)
Qualifier:
according to guideline
Guideline:
other: FAMIC Guidelines (2011), including the most recent revisions
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
tert-Butyl 4-({6-[7-cyclopentyl-6-(dimethylcarbamoyl)-7H-pyrrolo[2,3-d]pyrimidin-2-yl]amino}pyridin-3-yl)piperazine-1-carboxylate
EC Number:
810-753-4
Cas Number:
1374639-78-7
Molecular formula:
C28H38N8O3
IUPAC Name:
tert-Butyl 4-({6-[7-cyclopentyl-6-(dimethylcarbamoyl)-7H-pyrrolo[2,3-d]pyrimidin-2-yl]amino}pyridin-3-yl)piperazine-1-carboxylate
Test material form:
solid: bulk

Test animals

Species:
rabbit
Strain:
New Zealand White
Details on test animals or test system and environmental conditions:
Conditions
Environmental controls for the animal room were set to maintain 18 to 24°C, a relative humidity of 40 to 70%, at least 10 air changes/hour, and a 12-hour light/12-hour dark cycle. Any variations to these conditions were maintained in the raw data and had no effect on the outcome of the study.
Accommodation
Animals were individually housed in labeled cages with perforated floors (Ebeco, Germany, dimensions 67 x 62 x 55 cm) and shelters (Ebeco, Germany, dimensions 40 x 32 x 23 cm).
Acclimatization period was at least 5 days before start of treatment under laboratory conditions.
Diet
Pelleted diet for rabbits (Global Diet 2030 from Harlan Teklad®, Mucedola, Milanese, Italy) approximately 100 grams per day. Hay (TecniLab-BMI BV, Someren, The Netherlands) and wooden sticks (Swedish aspen wood, Bioservices, Uden, The Netherlands) were available during the study period
Water
Free access to tap water.
Diet, water, bedding and cage enrichment evaluation for contaminants and/or nutrients was performed according to facility standard procedures. There were no findings that could interfere with the study.

Test system

Type of coverage:
semiocclusive
Preparation of test site:
clipped
Vehicle:
other: watery ethanol (50% v/v)
Controls:
no
Amount / concentration applied:
Three rabbits were exposed to 0.5 grams of LEE011-A3, moistened with 50% watery ethanol by application onto clipped skin for 4 hours using a semi-occlusive dressing. Skin reactions were assessed 1, 24, 48 and 72 hours after exposure.
Duration of treatment / exposure:
4 h
Observation period:
Skin reactions were assessed 1, 24, 48 and 72 hours after exposure.
Number of animals:
3 males
Details on study design:
The study was performed in a stepwise manner and was started by treatment of a single rabbit (sentinel). The two other animals were treated in a similar manner 6 days later, after considering the degree of skin irritation observed in the first animal.

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
erythema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
ca. 0
Max. score:
0
Remarks on result:
no indication of irritation
Irritation parameter:
erythema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
ca. 0
Max. score:
0
Remarks on result:
no indication of irritation
Irritation parameter:
erythema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
ca. 0
Max. score:
0
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
ca. 0
Max. score:
0
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
ca. 0
Max. score:
0
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
ca. 0
Max. score:
0
Remarks on result:
no indication of irritation
Irritant / corrosive response data:
No skin irritation was caused by 4 hours exposure to LEE011-A3.
There was no evidence of a corrosive effect on the skin.
No staining of the treated skin by the test substance was observed and no test substance remnants were seen.
Other effects:
No symptoms of systemic toxicity were observed in the animals during the test period and no mortality occurred.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
Based on these results LEE011-A3 does not have to be classified and has no obligatory labelling requirement for skin irritation according to the:
- Globally Harmonized System of Classification and Labelling of Chemicals (GHS) of the United Nations (2011) (including all amendments),
- Regulation (EC) No 1272/2008 on classification, labelling and packaging of substances and mixtures (including all amendments).