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EC number: 947-990-9 | CAS number: -
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Repeated dose toxicity: oral
Administrative data
- Endpoint:
- short-term repeated dose toxicity: oral
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- Not specifed
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Non-GLP, near guideline, published in peer reviewed literature, adequate for assessment
- Justification for type of information:
- The test material used to test the toxicological properties described in the study used for this RSS is not exactly the same as Bos taurus, milk, pasteurized, homogenized, skimmed, fermented, spray-dried. However, the process used to prepare ‘Powdered Lactobacillus helveticus-fermented milk’ (FM) is qualitatively similar to that used in the production of ‘Bos taurus, milk, pasteurized, homogenized, skimmed, fermented, spray dried’ and is based on the same natural material (cow milk) and biological production process (bacterial fermentation). The components that are additionally removed from FM, lactic acid and casein, occur naturally in milk and milk that has been naturally exposed to microorganisms and are not expected to have important toxicological effects regarding acute oral toxicity, repeated dose oral toxicity, reproduction, or genotoxicity at the concentrations present in fermented milk products. Therefore, the toxicological properties reported on this study can be used in combination with the long historical safe consumption of yogurt and yogurt-derived products by humans in a weight of evidence analysis to assess the toxicological properties of 'Bos taurus, milk, pasteurized, homogenized, skimmed, fermented, spray dried' for this endpoint.
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- publication
- Title:
- Studies of the Toxicological Potential of Tripeptides: III. Single- and/or Repeated-Dose Toxicity of Tripeptides-Containing Lactobacillus helveticus–Fermented Milk Powder and Casein Hydrolysate in Rats
- Author:
- Maeno M, Nakamura Y, Mennear JH, Bernard BK
- Year:
- 2 005
- Bibliographic source:
- International Journal of Toxicology, 24(Suppl. 4):13–23
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 407 (Repeated Dose 28-Day Oral Toxicity Study in Rodents)
- Deviations:
- not specified
- GLP compliance:
- no
- Limit test:
- no
Test material
- Reference substance name:
- powdered L. helveticus–fermented milk
- IUPAC Name:
- powdered L. helveticus–fermented milk
- Test material form:
- solid
- Details on test material:
- Reconstituted skim milk (9%, w/w) was pasteurized and fermented with L. helveticus CM4 at 37°C for 22 h. Casein was removed by centrifugation and lactic acid was eliminated from the supernatant by electrodialysis. The residual supernatant was converted to fermented milk whey powder by using maltodextrin as a bulking agent and spray drying.
Constituent 1
- Specific details on test material used for the study:
- Reconstituted skim milk (9%, w/w) was pasteurized and fermented with L. helveticus CM4 at 37°C for 22 h. Casein was removed by centrifugation and lactic acid was eliminated from the supernatant by electrodialysis. The residual supernatant was converted to fermented milk whey powder by using maltodextrin as a bulking agent and spray drying.
Test animals
- Species:
- rat
- Strain:
- Sprague-Dawley
- Details on species / strain selection:
- (Crj:CD(SD), SPF)
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source:
- Age at study initiation: 6 to 7 weeks old
- Weight at study initiation: 140 to 201 g (males) and 112 to 164 g (females)
- Housing: individually in metal cages
- Diet: ad libitum pelleted CRF; Oriental Yeast Co., Ltd, or Rodent diet 5002; PMI Inc.
- Water: tap water ad libitum
- Acclimation period: 1 week
DETAILS OF FOOD AND WATER QUALITY:
Drinking water and food were routinely analyzed for contaminants. Analyses revealed no evidence of contamination that either compromised or influenced the outcome of the studies.
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19-25
- Humidity (%): 30-70
- Air changes (per hr): not specified
- Photoperiod (hrs dark / hrs light): 12h/12h
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- water
- Duration of treatment / exposure:
- 28 days
- Frequency of treatment:
- Daily
Doses / concentrationsopen allclose all
- Dose / conc.:
- 500 mg/kg bw/day (nominal)
- Dose / conc.:
- 1 000 mg/kg bw/day (nominal)
- Dose / conc.:
- 2 000 mg/kg bw/day (nominal)
- No. of animals per sex per dose:
- 10
- Control animals:
- yes, concurrent vehicle
Examinations
- Observations and examinations performed and frequency:
- CAGE SIDE OBSERVATIONS: grossly observable clinical signs
- Time schedule: Daily at the time of dosing and 2 to 4 h later
BODY WEIGHT: Yes
- Time schedule for examinations: on dosing days 1, 8, 15, 22, and 28, as well as on the day of necropsy (after an overnight fast).
FOOD CONSUMPTION AND COMPOUND INTAKE (if feeding study):
- Food consumption for each animal was determined twice weekly throughout the study
OPHTHALMOSCOPIC EXAMINATION: Yes
- Time schedule for examinations: During week 4
- Dose groups that were examined: all. Half of the animals in each group received a mydriatic to facilitate examination of the intermediate optic media and fundus.
HAEMATOLOGY: Yes
- Time schedule for collection of blood: day 28
- Anaesthetic used for blood collection: Yes, ethyl ether
- Animals fasted: Yes, overnight
- Animals euthanized by exsanguination
CLINICAL CHEMISTRY: Yes
- Time schedule for collection of blood: day 28
- Animals fasted: Yes, overnight
URINALYSIS: Yes
- Time schedule for collection of urine: during week 4
- Metabolism cages used for collection of urine: Yes
- Animals fasted: Not specified
- Parameters checked: sediment and color, pH, protein, glucose, ketone bodies, urobilinogen, bilirubin, and occult blood measured using a test paper method. Twentyfour-hour samples were used for determination of volume, specific gravity and electrolyte excretion
- Sacrifice and pathology:
- GROSS PATHOLOGY: Yes, major organs were weighed
HISTOPATHOLOGY: Yes. Approximately 35 organs and tissues from each animal were fixed
in 10% formalin. Organs from all control and high-dose group animals were embedded, sectioned, stained with hematoxylineosin, and examined microscopically
Because of the presence of eosinophilic bodies in the proximal tubular epithelium of kidneys
from two high-dose males, kidneys from mid-dose males were also processed and examined microscopically
Results and discussion
Results of examinations
- Clinical signs:
- no effects observed
- Mortality:
- no mortality observed
- Body weight and weight changes:
- no effects observed
- Food consumption and compound intake (if feeding study):
- no effects observed
- Ophthalmological findings:
- no effects observed
- Haematological findings:
- effects observed, non-treatment-related
- Description (incidence and severity):
- increases (3.8% to 5.2%) in hematocrit and hemoglobin concentrations in the low- and mid-dose male groups. There was no indication of similar changes in the highdose rats of either sex. Lack of evidence of a dose-response relationship indicates that these small changes are not related to
powdered FM administration. - Clinical biochemistry findings:
- no effects observed
- Urinalysis findings:
- effects observed, non-treatment-related
- Description (incidence and severity):
- Some male rats exhibited proteinuria and ketonuria, but these small changes were observed in both control and treated animals. The presence of white blood cells and epithelial cells in the urinary sediment was similar in dosed and control rats. Urinary volumes and excretion of electrolytes
were similar in all groups of rats. - Organ weight findings including organ / body weight ratios:
- no effects observed
- Gross pathological findings:
- effects observed, non-treatment-related
- Description (incidence and severity):
- 1 male rat from highest dose had a swollen right lateral lobe and the quadrate lobe of the liver had adhesions to the diaphragm.
1 male rat from highest dose had grossly observable white spots on the surface of a kidney. - Histopathological findings: non-neoplastic:
- no effects observed
- Histopathological findings: neoplastic:
- no effects observed
Effect levels
open allclose all
- Dose descriptor:
- other: maximally tolerated dose
- Effect level:
- > 2 000 mg/kg bw/day (nominal)
- Based on:
- test mat.
- Sex:
- male/female
- Remarks on result:
- not determinable due to absence of adverse toxic effects
- Key result
- Dose descriptor:
- LOEL
- Effect level:
- > 2 000 mg/kg bw/day (nominal)
- Based on:
- test mat.
- Sex:
- male/female
- Remarks on result:
- not determinable due to absence of adverse toxic effects
Target system / organ toxicity
- Key result
- Critical effects observed:
- no
Applicant's summary and conclusion
- Conclusions:
- Administration of powdered fermented milk (FM) for 28 consecutive days produced no signs of toxicity and resulted in the conclusion that the LOEL must be greater than 2000 mg/kg BW/day
According to the considerations previously listed on the field "justification for type of information", it can be concluded that "Bos taurus, milk, pasteurized, homogenized, skimmed, fermented, spray-dried" (EC No. 917-734-0) would likewise have a LOEL greater that 200 mg/kg BW day for rats, after 28 days consecutive oral exposure. - Executive summary:
Powdered Lactobacillus helveticus–fermented milk (FM) was administered by oral gavage Sprague- Dawley rats. 0, 500, 1000, or 2000 mg/kg body weight [BW]/day was administered by gastric gavage to male and female rats for 28 consecutive days.
Antemortem evaluative parameters included gross observations, ophthalmic examinations, and clinical pathology (clinical chemistry, hematology, and urinalysis). Post mortem parameters included necropsy, determination of organ weights, and
microscopic examination of major organs. There was neither inlife nor postmortem evidence that powdered FM administration
caused physiological or toxicological changes.
There was no evidence to support establishment of either the LOEL or MTD; both being greater than 2000 mg/kg/day for up to 28 consecutive days.
The process used to prepare ‘Powdered Lactobacillus helveticus-fermented milk’ (FM) is qualitatively similar to that used in the production of ‘Bos taurus, milk, pasteurized, homogenized, skimmed, fermented, spray dried’ and is based on the same natural material (cow milk) and biological production process (bacterial fermentation).The components that are additionally removed from FM, lactic acid and casein, occur naturally in milk and milk that has been naturally exposed to microorganisms and are not expected to have important toxicological effects regarding acute oral toxicity, repeated oral dose toxicity,
reproduction, or genotoxicity at the concentrations present in fermented milk products.
Therefore, taking into account the previous considerations, it is safe to assume that the LOEL for repeated exposure of rats during 28 consecutive days to 'Bos taurus, milk, pasteurized, homogenized, skimmed, fermented, spray dried' would also be greater than 2000 mg/kg bw day.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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