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Toxicological information

Acute Toxicity: oral

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Administrative data

Endpoint:
acute toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 2016-06-29 to 2016-07-19
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report Date:
2016

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 870.1100 (Acute Oral Toxicity)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Test type:
acute toxic class method
Limit test:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
- Name of test material (as cited in study report): JNJ-1580774-AAA (T000835)
- Physical state: solid powder
- Appearance: slight beige
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: I16BB1136
- Expiration date of the lot/batch: 02 March 2017 (retest date)
- Purity: >=95.0%

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: At room temperature
- Solubility and stability of the test substance in the solvent/vehicle: no data
The vehicle was selected based on trial preparations performed at Charles River Den Bosch and on test item data supplied by the Sponsor. The vehicle was chosen from (in order of preference): water (Elix) (test item did not dissolve), 1% aq. carboxymethyl cellulose (test item did not dissolve), propylene glycol (spec.gravity 1.036) (turbid solution), polyethylene glycol 400 (spec. gravity 1.125) and corn oil (spec. gravity 0.92).

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing:
The preparations (w/w) were kept at room temperature and were dosed within 4 hours after adding the vehicle to the test item. Homogeneity was assessed by visual inspection of the solutions and the formulations were stirred during dosing, which ensures homogeneity sufficiently for these kinds of studies. Adjustment was made for specific gravity of the vehicle. No correction was made for purity of the test item as the correction factor is 1

Test animals

Species:
rat
Strain:
Wistar
Sex:
female
Details on test animals and environmental conditions:
TEST ANIMALS
- Source: female rats (nulliparous and non-pregnant), Wistar strain Crl:WI (Han) (outbred, SPF-Quality); Charles River Deutschland, Sulzfeld, Germany
- Age at study initiation: approx. 8-9 weeks
- Weight at study initiation: day 1 pre-administration: 151-157 g (first group), 158-172 g (second group)
- Fasting period before study: animals were deprived of food overnight prior to dosing and until 3-4 hours after administration of the test item. Water was available ad libitum.
- Housing: group housing of 3 animals per cage in labeled Makrolon cages (MIV type; height 18 cm.) containing sterilized sawdust as bedding material (Lignocel S 8-15, JRS - J.Rettenmaier & Söhne GmbH + CO. KG, Rosenberg, Germany) and paper as cage-enrichment (Enviro-dri, Wm. Lillico & Son (Wonham Mill Ltd), Surrey, United Kingdom).
- Diet (e.g. ad libitum): ad libitum, free access to pelleted rodent diet
- Water (e.g. ad libitum): ad libitum, free access to tap water.
- Acclimation period: at least 5 days before start of treatment under laboratory conditions.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18-24 °C
- Humidity (%): 40-70%
- Air changes (per hr): at least 10
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
propylene glycol
Details on oral exposure:
VEHICLE
- Concentration in vehicle: not indicated
- Amount of vehicle (if gavage): not indicated
- Justification for choice of vehicle:
The vehicle was selected based on trial preparations performed at Charles River Den Bosch and on test item data supplied. The vehicle was chosen from (in order of preference): water (Elix) (test item did not dissolve), 1% aq. carboxymethyl cellulose (test item did not dissolve), propylene glycol (spec.gravity 1.036) (turbid solution), polyethylene glycol 400 (spec. gravity 1.125) and corn oil (spec. gravity 0.92).

MAXIMUM DOSE VOLUME APPLIED: 10 ml/kg

DOSAGE PREPARATION:
- The preparations (w/w) were kept at room temperature and were dosed within 4 hours after adding the vehicle to the test item. Homogeneity was obtained to visually acceptable levels and the formulations were stirred during dosing, which ensures homogeneity sufficient for these kinds of studies.

CLASS METHOD (if applicable)
- Rationale for the selection of the starting dose:
The toxicity of the test item was assessed by stepwise treatment of groups of 3 females. The first group was treated at a dose level of 2000 mg/kg. The absence or presence of mortality of animals dosed at one step determined the next step, based on the test procedure defined in the guidelines.
Doses:
2000 mg/kg (single dosage) (two groups were treated sequentially)
No. of animals per sex per dose:
3 females per dose
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days (until day 15)
- Frequency of observations and weighing:
mortality/viability: twice daily.
body weights: days 1 (pre-administration), 8 and 15
clinical signs: at periodic intervals on the day of dosing (day 1) and once daily thereafter, until day 15. The signs were graded according to fixed scales and the time of onset, degree and duration were recorded: maximum grade 4: grading slight (1) to very severe (4); maximum grade 3: grading slight (1) to severe (3); maximum grade 1: presence is scored (1).
- Necropsy of survivors performed: yes, all animals assigned to the study were subjected to necropsy and descriptions of all internal macroscopic abnormalities recorded.
Statistics:
No statistical analysis was performed.

Results and discussion

Effect levels
Key result
Sex:
female
Dose descriptor:
LD50
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
Mortality:
No mortality occurred.
Clinical signs:
Hunched posture and/or piloerection were noted for all animals on Day 1.
Body weight:
The mean body weight gain shown by the surviving animals over the study period was considered to be similar to that expected for normal untreated animals of the same age and strain.
Gross pathology:
No abnormalities were found at macroscopic post mortem examination of all animals.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
The oral LD50 value of T000835 in Wistar rats was established to exceed 2000 mg/kg body weight. According to the OECD 423 test guideline, the LD50 cut-off value was considered to exceed 5000 mg/kg body weight. Based on these results, the test item does not have to be classified and has no obligatory labelling requirement for acute oral toxicity according to the GHS and Regulation (EC) No 1272/2008.