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Toxicological information

Repeated dose toxicity: oral

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Administrative data

Endpoint:
short-term repeated dose toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Cross-reference
Reason / purpose:
reference to same study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 407 (Repeated Dose 28-Day Oral Toxicity in Rodents)
GLP compliance:
yes
Limit test:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: liquid
Details on test material:
Dye content: 41.2 %

Test animals

Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals and environmental conditions:
TEST ANIMALS
- Age at study initiation: 6-7 weeks
- Weight at study initiation (mean): males 193g , females 154 g
- Housing: in groups of 2 or 3 animals
- Diet ad libitum
- Water . ad libitum:
- Acclimation period: approximately 1 week

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22
- Humidity (%): 55
- Air changes (per hr): >10
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
water
Details on oral exposure:
Bayscript Blaukomponente (konserviert) was adminestered orally by gavage to 5 male and 5 female Wistar rats per dose group using tap water as vehicle in daily doses of 0, 100, 300, 1000 mg/kg bw/day for aperiod of four weeks
Analytical verification of doses or concentrations:
yes
Details on analytical verification of doses or concentrations:
Before the start of the treatment the suitability of the proposed formulations was confirmed by the analyses of condentration and stability
Stability: the dosage forms prepared were analysed 4 hoursm 1,4,and 7 days after preparation
Concentration: the concenntration of samples of control and each test substance dosage form prepared were determined twice during the study
Duration of treatment / exposure:
males: 28 days. females 29 days
Frequency of treatment:
daily
Doses / concentrations
Remarks:
Doses / Concentrations:
0, 100, 300, 1000 mg/kg bw/day
Basis:

No. of animals per sex per dose:
5
Control animals:
yes, concurrent vehicle
Details on study design:
Bayscript Blaukomponente (konserviert) was adminestered orally by gavage to 5 male and 5 female Wistar rats per dose group using tap water as vehicle in daily doses of 0, 100, 300, 1000 mg/kg bw/day for aperiod of four weeks.The animals were regularely observed, weighed and food and water intakes were determined. In addition, clinical laboratory investigations of blood samples was performed. Organs and tissues were subjected to gross and histopathological investigation.
Positive control:
no

Examinations

Observations and examinations performed and frequency:
Inspection of Animals:
for Morbidity and Mortality Twice daily
General Clinical Examinations (in cage) Daily
Detailed Clinical Examinations Daily
Open Field Observation (OFO) Weekly
Functional Observational Battery Once
Motor Actvity Once
Determination of:
Body Weight(s) Daily
Food Consumption Weekly
Water Consumption Weekly
Feeding Period: Approximately 7 days
Clinical Laboratory Investigation:
Hematology Once
Leucocytes, erythrocytes, hemoglobin, hematocrit, reticulocytes, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), thrombocytes, Hepato Quick, differential blood count
Clinical Chemistry Once
Alanine aminotransferase, aspartate aminotransferase, albumin, protein (total), bile acids, cholesterol, creatinine, urea, glucose, sodium, potassium, total bilirubin.
Sacrifice and pathology:
Necropsy : week 5
The organ weights determined before fixation of all animals:
adrenals, brain,epididymidesheart, kidneys,liver, ovaries/oviduct, prostate, seminal vesiceswith coagulation gland, spleen, testes, thymus, uterus with cervix
gross and histological examination:
all weighed organs and additionally
caecum, colon, duodenumeyes, femur with bone marrow, joint, ileum, jejunum, larynx, lungs, lymph nodes mandibular mesemteric iliacale, optic nerves, pancreas, Peyer's patches, rectum, siatic nerve
Statistics:
Dunnett, U-test, Het-Dunn ( Dunnett exact test heterogeneous test)

Results and discussion

Results of examinations

Details on results:
CLINICAL SIGNS AND MORTALITY
No animal died unsheduled
The only clinical finding noted wss a bluish discoloration of the whole body of all animals at 1000 mg/kg bw/day

BODY WEIGHT AND WEIGHT GAIN
Bofx weight development of males and females was not retarded by the treatment up to 1000 mg/kg bw/day

FOOD CONSUMPTION AND WATER CONSUMPTION
Mean food intake of treated animals over the dosing period was comparable to the respective controls
The water intake was increased starting at 100 mg/kg bw/day. howeverm the difference to control was relatively slight for the low dose group of females nad there was no dose dependencefor the loww and mid dose group of males

HAEMATOLOGY
1000 mg/kg bw/day, males and females:
minor changes in red blood cell parameters were associated with the appearing glolden -brown pigment deposision in the spleen
1000 mg/kg bw/day, males:
thrombocyte count was increased in males at 1000 mg/kg bw/day:
1083.2 G/l (p<=0.01) versus 783.6 G/l of control

CLINICAL CHEMISTRY
Clinical chemistry gave no evidence of treatement.related adverse effects up to 1000 mg/kg bw/day

NEUROBEHAVIOUR
The determination of the motor activita and the Locomotor activity gave no evidence for a relevant treatment realted effect.
Despite the bluishdiscoloration Functional observation battery gave no evidence for treatment related findings

ORGAN WEIGHTS
Determination of organ weights revealed increased absolute and relative weights
The differences given in brackets are the differences of relative organ weights compared to the respective control value.
adrenal glands at 1000 mg/kg b.w./day in females (+13%), of
heart at 1000 mg/kg b.w./day in males (+18%), of
liver at 1000 mg/kg. b.w./day in males (+18%) and females (+19%), of
kidneys starting at 100 mg/kg b.w./day in males (+12%, + 28%, +30%) and at 1000 mg/kg b.w./day in females (+18%),
thymus at 1000 mg/kg b.w./day in females (+13%) and of
uterus starting at 300 mg/kg b.w./day (+ 23%, +21%).

GROSS PATHOLOGY - discolorations of organs
100, 300, 1000 mg/kg bw/day:
At necropsy, dark, blue, gray or black discoloration of the kidneys was noted in most animals treated at 100 mg/kg b.w./day and in all animals treated at 300 or 1000 mg/kg b.w./day, the intensity of the color being approximately dose-related.
at 1000 mg/kg b.w./day.
There was also a discoloration of a variety of other organs, mostly described as gray, and in isolated cases as black, confined to males and females.
Organs concerned were the liver (9/10 rats), skin (9/10 rats), mesenteric lymph node (3/10 rats), stomach (4/10 rats), testis (5/5 rats), uterus (3/5 rats) and generalized lymph nodes (3/10 rats). These discolorations were considered to be related to the test item.

HISTOPATHOLOGY: NON-NEOPLASTIC
---discolorations within organs (deposites) mainly in the 1000 mg/kg bw/day -groups::
kidneys, mesenteric lymph nodes, testes, Peyer's patch, spleen
---histopathological changes
kidneys:
At 1000 mg/kg b.w./day, only, mild or moderate multifocal corticotubular degeneration and a mildly increased incidence and/or severity of cortical basophilic (regenerative) tubules, when compared with the control group. Furthermore, multifocal minimal corticotubular dilation was seen in at 300 (males) and 1000 mg/kg b.w./day (males and females).
nerve roots
In nerve roots at the spinal cord, demyelinated fibers were seen at 1000 mg/kg b.w./day in males and females. The change was minimal in degree, except for one male in which it was mild. There were no other relevant histopathological lesions in the central or peripheral nerve system.
adrenal gland:
in 2/5 females treated at 1000 mg/kg/day, a minimal diffuse cortical hypertrophy of the adrenal gland was seen histologically. However, in view of the individual variability noted in adrenal gland histomorphology and the absence of a statistically significant weight difference in the high dose group, this minor difference was not considered to be sufficient evidence of a test item-related effect.

Effect levels

Dose descriptor:
NOAEL
Effect level:
300 mg/kg bw/day (actual dose received)
Sex:
male/female
Basis for effect level:
other: due to degenerative effects on kidneys and nerve roots at 1000 mg/kg bw/day

Target system / organ toxicity

Critical effects observed:
not specified

Applicant's summary and conclusion

Conclusions:
Bayscript Blaukomponente (konserviert) was administered orally by gavage to 5 male and 5 female Wistar rats per dose group using tap water as vehicle, in daily doses of 0, 100, 300, 1000 mg/kg bw/day for a period of four weeks. This GLP study was performed according to OECD guideline 407.
Treatment with Bayscript Blaukomponente resulted in several findings which were related to the color of the test substance. The whole body and several organs of animals treated with 1000 mg/kg bw/day appeared discolored. The kidneys were also discolored in the lower dose groups.
In the kidneys, beneath findings associated with the color of the test substance (starting at 300 mg/kg b.w./day), corticotubular degeneration and increased incidence and/or severity of cortical basophilic (regenerative) tubules were noted at 1000 mg/kg b.w./day. Furthermore, demyelinated fibers in nerve roots at the spinal cord were seen in both sexes at 1000 mg/kg b.w./day.
At 1000 mg/kg b.w./day, histopathological findings in the mesenteric lymph node, the interstitium of the testis, and in the Peyer's patch were related to the colored test item and not accompanied by other structural changes of the organs.
Minor changes in red blood cell parameters observed for males and females at 1000 mg/kg b.w./day were associated with appearing of golden-brown pigment deposition in the spleen in females. In males, the thrombocyte count was increased at 1000 mg/kg b.w./day.

Under the conditions described the no adverse observed effect level (NOAEL) for administration of BAYSCRIPT Blaukomponente (konserviert) to male and female Wistar rats was 300 mg/kg b.w./day mainly due to degenerative effects on kidneys and nerve roots. According to CLP classification criteria (Regulation (EC) No 1272/2008) a classification is not justified.
Executive summary:

Bayscript Blaukomponente (konserviert) was administered orally by gavage to 5 male and 5 female Wistar rats per dose group using tap water as vehicle, in daily doses of 0, 100, 300, 1000 mg/kg bw/day for a period of four weeks. This GLP study was performed according to OECD guideline 407.

Treatment with Bayscript Blaukomponente resulted in several findings which were related to the color of the test substance. The whole body and several organs of animals treated with 1000 mg/kg bw/day appeared discolored. The kidneys were also discolored in the lower dose groups.

In the kidneys, beneath findings associated with the color of the test substance (starting at 300 mg/kg b.w./day), corticotubular degeneration and increased incidence and/or severity of cortical basophilic (regenerative) tubules were noted at 1000 mg/kg b.w./day. Furthermore, demyelinated fibers in nerve roots at the spinal cord were seen in both sexes at 1000 mg/kg b.w./day.

At 1000 mg/kg b.w./day, histopathological findings in the mesenteric lymph node, the interstitium of the testis, and in the Peyer's patch were related to the colored test item and not accompanied by other structural changes of the organs.

Minor changes in red blood cell parameters observed for males and females at 1000 mg/kg b.w./day were associated with appearing of golden-brown pigment deposition in the spleen in females. In males, the thrombocyte count was increased at 1000 mg/kg b.w./day.

Under the conditions described the no adverse observed effect level (NOAEL) for administration of BAYSCRIPT Blaukomponente (konserviert) to male and female Wistar rats was 300 mg/kg b.w./day mainly due to degenerative effects on kidneys and nerve roots. According to CLP classification criteria (Regulation (EC) No 1272/2008) a classification is not justified.