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Akamo AJ, Akinloye DI, Ugbaja RN, Adeleye OO, Dosumu OA, Eteng OE, Antiya MC, Amah G, Ajayi OA, Faseun SO. Naringin prevents cyclophosphamide-induced erythrocytotoxicity in rats by abrogating oxidative stress. Toxicol Rep 2021; 8:1803-1813. [PMID: 34760624 PMCID: PMC8567332 DOI: 10.1016/j.toxrep.2021.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 09/30/2021] [Accepted: 10/24/2021] [Indexed: 01/02/2023] Open
Abstract
Earlier reports have shown that Cyclophosphamide (CYCP), an anti-malignant drug, elicited cytotoxicity; and that naringin has several beneficial potentials against oxidative stress and dyslipidaemias. We investigated the influence of naringin on free radical scavenging, cellular integrity, cellular ATP, antioxidants, oxidative stress, and lipid profiles in the CYCP-induced erythrocytotoxicity rat model. Rats were pretreated orally by gavage for fourteen consecutive days with three doses (50, 100, and 200 mg/kg) naringin before single CYCP (200 mg/kg, i.p.) administration. Afterwards, the rats were sacrificed. Naringin concentrations required for 50 % scavenging hydrogen peroxide and nitric oxide radical were 0.27 mg/mL and 0.28 mg/mL, respectively. Naringin pretreatment significantly (p < 0.05) protected erythrocytes plasma membrane architecture and integrity by abolishing CYCP-induced decrease in the activity of erythrocyte LDH (a marker of ATP). Pretreatment with naringin remarkably (p < 0.05) reversed CYCP-induced decreases in the erythrocytes glutathione levels, activities of glutathione-S-transferase, catalase, glutathione peroxidase, and glutathione reductase; attenuated CYCP-mediated increases in erythrocytes levels of malondialdehyde, nitric oxide, and major lipids (cholesterol, triacylglycerol, phospholipids, and non-esterified fatty acids). Taken together, different acute pretreatment doses of naringin might avert CYCP-mediated erythrocytes dysfunctions via its antioxidant, free-radical scavenging, and anti-dyslipidaemia properties.
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Key Words
- AP-1, activator protein 1
- ATP, adenosine triphosphate
- Antioxidants
- BHT, butylated hydroxytoluene
- C31H28N2Na4O13S, xylenol tetrasodium
- C5FeN6Na2O, sodium nitroprusside
- CAT, catalase
- CDNB, 1-chloro-2,4-dinitrobenzene
- CYCP, cyclophosphamide
- Cu(NO3)2.3H2O, copper II nitrate
- Cyclophosphamide
- DNA, deoxyribonucleic acid
- DTNB, 5,5ˈ-dithiobis(2-nitrobenzoic acid)
- Erythrocytotoxicity
- FeSO4.7H2O, Iron (II) sulfate heptahydrate
- G6PDH, glucose-6-phosphate dehydrogenase
- GSH, reduced glutathione
- GSPx, glutathione peroxidase
- GSR, glutathione reductase
- GSSG, oxidized glutathione
- GST, glutathione-S-transferase
- H2O2, hydrogen peroxide
- H3PO3, phosphoric acid
- HO•, hydroxyl radical
- HSCs, hepatic stellate cells
- K2HPO4, dipotassium hydrogen phosphate
- KCl, potassium chloride
- LDH, lactate dehydrogenase
- Lipid profile
- MAPKs, mitogen-activated protein kinases
- MDA, malondialdehyde
- MMP, matrix metalloprotease
- NAD+, nicotinamide adenine dinucleotide
- NADH, nicotinamide adenine dinucleotide reduced
- NADPH, nicotinamide adenine dinucleotide phosphate reduced
- NF-κB, nuclear factor kappa B
- NH4OH, ammonium hydroxide
- NO, nitric oxide
- NO2−, nitrite
- NO3−, nitrate
- NOAEL, no-observed-adverse-effect level
- Na2HPO4, disodium hydrogen phosphate
- NaH2PO4, sodium dihydrogen phosphate
- Naringin
- Nrf2, nuclear factor-erythroid factor 2-related factor 2
- O2HbFe2+, oxyhemoglobin
- O2•–, superoxide radical
- OONO−, peroxynitrite radical
- Oxidative stress
- PBS, phosphate-buffered saline
- PUFA, Polyunsaturated fatty acids
- R-Smad, Smad activated receptor
- RNS, reactive nitrogen species
- ROS, reactive oxygen species
- SOD, superoxide dismutase
- TBA, 2-thiobarbituric acid
- TBARS, thiobarbituric acid reactive substances
- TGF-β, transforming growth factor-β
- TLR, toll-like receptor
- TROOH, total hydroperoxide
- VLDL, very low density lipoprotein
- eNOS, endothelial nitric oxide synthase
- i.p., intraperitoneally
- mRNA, messenger ribonucleic acid
- metHb, methemoglobin
- α-SMA, alpha smooth muscle actin
- •NO, nitric oxide radical
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Affiliation(s)
- Adio J. Akamo
- Department of Biochemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Dorcas I. Akinloye
- Department of Biochemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Regina N. Ugbaja
- Department of Biochemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Oluwagbemiga O. Adeleye
- Department of Animal Production and Health, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Oluwatosin A. Dosumu
- Department of Biochemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Ofem E. Eteng
- Department of Biochemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Moses C. Antiya
- Department of Biochemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Gogonte Amah
- Department of Biochemistry, Benjamin Carson (SRN) School of Medicine, Babcock University, Ilisan, Ogun State, Nigeria
| | - Oluwafunke A. Ajayi
- Department of Biochemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Samuel O. Faseun
- Department of Biochemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
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Alehaideb Z, Matou-Nasri S. Determination of benchmark doses for linear furanocoumarin consumption associated with inhibition of cytochrome P450 1A2 isoenzyme activity in healthy human adults. Toxicol Rep 2021; 8:1437-44. [PMID: 34377680 DOI: 10.1016/j.toxrep.2021.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 07/18/2021] [Accepted: 07/19/2021] [Indexed: 11/23/2022] Open
Abstract
Millions of individuals globally consume traditional herbal medicines (THMs), which contain abundant amounts of linear furanocoumarins. Linear furanocoumarins (i.e., 8-methoxypsoralen, 5-methoxypsoralen, and isopimpinellin) are inhibitors of cytochrome P450 (CYP) isoenzymes including 1A2, a major enzyme involved in drug metabolism and carcinogen bioactivation. Despite the high consumption of furanocoumarin-containing THMs, no studies have measured the furanocoumarin consumption level that triggers an inhibition to CYP1A2 activity in humans. The first objective was to verify if the potencies of the three furanocoumarins are additive towards the inhibition of CYP1A2 activity in vitro using concentration-addition and whole-mixture chemical-mixture-assessment models. A second objective was to determine the benchmark dose (BMD) with the mixtures of furanocoumarin oral doses, expressed as 8-MOP equivalents, and to assess the in vivo CYP1A2 activity, expressed as inhibition percentages. The in vitro results indicated that the three furanocoumarin inhibitory potencies were additive in the THM extracts, validating the use of the concentration-addition model in total furanocoumarin dose-equivalent calculations. Using the USEPA BMD software, the BMD was 18.9 μg 8-MOP equivalent/kg body weight. This information is crucial for furanocoumarin-related health-assessment studies and the regulation of THMs. Further studies should be performed for the remaining major metabolic enzymes to complete the safety profile of furanocoumarin-containing THMs and to provide accurate warning labelling.
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Key Words
- 5-MOP, 5-methoxypsoralen
- 8-MOP, 8-methoxypsoralen
- AIC, Akaike’s information criterion
- BMD, benchmark dose
- BMDL, BMD lower bound
- BMDS, BMD software
- BMDU, BMD upper bound
- BMR, benchmark response
- Benchmark dose
- CA, concentration-addition model
- CYP, cytochrome P450
- Caffeine
- Cytochrome 1A2 enzyme
- DMSO, dimethyl sulfoxide
- Furanocoumarin
- HLM, human liver microsomes
- HPLC, high-performance liquid chromatography
- IC50, concentration at 50 % inhibition
- ISOP, isopimpinellin
- LOAEL, lowest-observed-adverse-effect level
- Metabolism
- NADPH, β-nicotinamide adenine dinucleotide phosphate hydrogen
- NOAEL, no-observed-adverse-effect level
- POD, point-of-departure
- RPF, relative potency factor
- SD, standard deviation
- TCL, treated clearance
- THM, traditional herbal medicine
- Traditional herbal medicines
- UCL, untreated clearance
- USEPA, United States Environmental Protection Agency
- WM, whole-mixture model
- log10, common log
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Karimani A, Ramezani N, Afkhami Goli A, Nazem Shirazi MH, Nourani H, Jafari AM. Subchronic neurotoxicity of diazinon in albino mice: Impact of oxidative stress, AChE activity, and gene expression disturbances in the cerebral cortex and hippocampus on mood, spatial learning, and memory function. Toxicol Rep 2021; 8:1280-1288. [PMID: 34277358 PMCID: PMC8261896 DOI: 10.1016/j.toxrep.2021.06.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 06/06/2021] [Accepted: 06/14/2021] [Indexed: 02/03/2023] Open
Abstract
Diazinon (DZN) with prominent neurotoxic effects perturbs CNS function via multiple mechanisms. This investigation intends to explore mood, spatial learning, and memory dysfunction, acetylcholine esterase (AChE) activity, and neurodegeneration-related gene expression in the cortex and hippocampus regions of mice exposed to DZN for 63 consecutive days (subchronic exposure). Adult male albino mice were orally given sublethal DZN (DZNL = 0.1 mg/kg, DZNM = 1 mg/kg and DZNH = 10 mg/kg). All mice in the DZNH group died within 3 weeks postexposure. DZNL and DZNM caused body and brain weight loss (p < 0.05). Completing 9 weeks of DZN exposure, a marked decline in AChE activity and oxidative stress level was indicated in both brain regions (p < 0.05). Also, synaptophysin, vesicular acetylcholine transferase, and glutamate decarboxylase gene expressions were affected in both brain regions (p < 0.05). Furthermore, the present study revealed that DZN administration increased anxiety and depressive-like behaviors (p < 0.0001). Spatial learning and short- and long-memory were severely affected by DZNL and DZNM treatments (p < 0.0001). Taken together, subchronic exposure to low and medium doses of DZN can cause AChE inhibition, oxidative damage, and neurotransmitter disturbances in brain cells and induce neurodegeneration. These changes would impair mood, spatial learning, and memory function.
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Key Words
- AChE, acetylcholine esterase
- AD, Alzheimer’s disease
- Ach, acetylcholine
- COX-2, cyclooxygenase-2
- CX, cerebral cortex
- Cerebral cortex
- DZN, diazinon
- DZO, diazoxon
- Diazinon
- FRAP, ferric reducing antioxidant power
- FST, forced swim test
- GABA, ϒ-aminobutyric acid
- GAD65, glutamate decarboxylase 65
- HP, hippocampus
- Hippocampus
- LD50, lethal dose 50
- MB, marble burying test
- MDA, malondialdehyde
- MWM, Morris water maze test
- Memory
- NOAEL, no-observed-adverse-effect level
- Neurodegenerative diseases
- Ops, organophosphates
- PD, Parkinson’s disease
- RNS, reactive nitrogen species
- ROS, reactive oxygen species
- SEM, standard error of the mean
- SYP, synaptophysin
- Spatial learning
- VAChT, vesicular acetylcholine transferase
- qRT-PCR, quantitative reverse transcription-polymerase chain reaction
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Affiliation(s)
- Asieh Karimani
- Department of Toxicology, School of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Nasrin Ramezani
- Department of Toxicology, School of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Amir Afkhami Goli
- Department of Toxicology, School of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | | | - Hosein Nourani
- Department of Pathology, School of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Amir Moghaddam Jafari
- Department of Toxicology, School of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
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Lu V, Bastaki M, Api AM, Aubanel M, Bauter M, Cachet T, Demyttenaere J, Diop MM, Harman CL, Hayashi SM, Krammer G, Mendes O, Renskers KJ, Schnabel J, Taylor SV. Dietary administration of β-ionone epoxide to Sprague-Dawley rats for 90 days. Curr Res Toxicol 2021; 2:192-201. [PMID: 34345860 PMCID: PMC8320606 DOI: 10.1016/j.crtox.2021.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/22/2021] [Accepted: 05/12/2021] [Indexed: 11/28/2022] Open
Abstract
In a 90-day GLP-compliant study groups of Sprague-Dawley rats (10/sex/group) were fed diets containing β-ionone epoxide, a fragrance material and a flavoring substance, at dietary concentrations providing target intakes of 0, 20, 40 and 80 mg/kg bw/day. There were no deaths and no adverse changes in clinical observations, ophthalmological examinations, body weight, body weight gain, food consumption, food efficiency; hematology, serum chemistry, urinalysis parameters; or in macroscopic findings attributable to β-ionone epoxide administration. Increased absolute and relative liver weights in high dose females without correlating hepatic histopathological findings were considered non-adverse. Cortical vacuolation of adrenal zona fasciculata was observed in high-dose males but was considered non-adverse due to the nondegenerative nature of this alteration. β-Ionone epoxide did not influence estrus cyclicity in females and did not affect sperm morphology or epididymal sperm count, homogenization-resistant spermatid count and motility measurements in male rats. The no-observed-adverse-effect level (NOAEL) for administration of β-ionone epoxide in the diet was determined to be the highest dose tested of 80 mg/kg bw/day.
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Key Words
- AAALAC, Association for Assessment and Accreditation of Laboratory Animal Care
- CAS, Chemical Abstracts Service
- CFR, Code of Federal Regulation
- EFSA, European Food Safety Authority
- EPA, Environmental Protection Agency
- FDA, Food and Drug Administration
- FEMA GRAS
- FEMA, Flavor and Extract Manufacturers Association
- GLP, Good Laboratory Practice
- GRAS, Generally Recognized as Safe
- JECFA, Joint FAO/WHO Expert Committee on Food Additives
- MW, molecular weight
- NOAEL, no-observed-adverse-effect level
- OECD, Organisation of Economic Cooperation and Development
- RSD, relative standard deviation
- Rat
- SD, standard deviation
- Toxicity
- beta-Ionone epoxide
- bw or BdW, body weight
- flavoring ingredient
- fragrance material
- ppm, parts per million
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Affiliation(s)
- Vivian Lu
- International Organization of the Flavor Industry, 1101 17th Street NW, Suite 700, Washington, DC 20036, USA
| | - Maria Bastaki
- International Organization of the Flavor Industry, 1101 17th Street NW, Suite 700, Washington, DC 20036, USA
| | - Anne Marie Api
- Research Institute for Fragrance Materials, Inc., 50 Tice Blvd., Woodcliff Lake, NJ 07677, USA
| | - Michel Aubanel
- Kerry Flavours France, Zl du Plan BP 82067, 63 Avenue Jean Maubert, 06131 Grasse Cedex, France
| | - Mark Bauter
- Product Safety Labs, 2394 US Route 130, Dayton, NJ 08810, USA
| | - Thierry Cachet
- International Organization of the Flavor Industry, Avenue des Arts 6, B-1210 Brussels, Belgium
| | - Jan Demyttenaere
- European Flavour Association, Avenue des Arts 6, B-1210 Brussels, Belgium
| | | | - Christie L. Harman
- Flavor and Extract Manufacturers Association, 1101 17th Street NW, Suite 700, Washington, DC 20036, USA
| | - Shim-mo Hayashi
- Japan Flavor and Fragrance Materials Association, Sankeinihonbashi Bldg. 6F, 4-7-1 Nihonbashi-Honcho, Chuo-ku, Tokyo, 103-0023, Japan
| | | | - Odete Mendes
- Product Safety Labs, 2394 US Route 130, Dayton, NJ 08810, USA
| | - Kevin J. Renskers
- Takasago International Corporation, 4 Volvo Drive, PO Box 932, Rockleigh, NJ 07647, USA
| | - Jürgen Schnabel
- Givaudan International SA, Kemptpark 50, 8310 Kemptthal, Switzerland
| | - Sean V. Taylor
- International Organization of the Flavor Industry, 1101 17th Street NW, Suite 700, Washington, DC 20036, USA
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Tajiri H, Tanaka W, Takashima M, Matsuyama H, Sugita T, Hidaka K, Sakakibara H. Subchronic safety evaluation of hot-water extract from thinned immature mangos ( Mangifera indica 'Irwin'): 90-days oral toxicity study in rats. Toxicol Rep 2021; 8:1046-1053. [PMID: 34040996 PMCID: PMC8142251 DOI: 10.1016/j.toxrep.2021.05.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 05/05/2021] [Accepted: 05/10/2021] [Indexed: 11/29/2022] Open
Abstract
Thinned immature mango fruits are usually handled as waste. Information is limited about the safety of its daily consumption. A 90-days toxicity study of its hot-water extract (TIMEx) was conducted in rats. TIMEx is safe for daily consumption and its NOAEL is 2500 mg/kg/day. Thinned immature mango fruits will be candidate for functional food.
Thinned immature fruit of the mango tree (Mangifera indica ‘Irwin’) are handled as waste. In this study, we conducted a 90-days toxicity study in male and female Sprague Dawley rats to evaluate the safety of a hot-water extract of thinned immature mango fruits (TIMEx) administered by oral gavage at doses of 500, 1000 and 2500 mg/kg body weight/day. Treatment did not result in death or changes in the behavior or external appearance of the animals. No alterations were observed in hematological or serum chemical parameters, urinalysis, food consumption, body weight gain or organ weights at the end of the treatment period, with the exception of higher mean corpuscular volume in male rats that received high doses and lower serum creatine phosphokinase levels in female rats that received medium doses. Under the conditions of this study and based on the toxicological endpoints evaluated, the no-observed-adverse-effect level (NOAEL) for TIMEx was 2500 mg/kg/day. The findings indicate that TIMEx is safe for consumption and should be investigated as a candidate food.
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Affiliation(s)
- Hayato Tajiri
- Graduate School of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Wataru Tanaka
- Graduate School of Agriculture, University of Miyazaki, Miyazaki, Japan
| | | | - Hiroki Matsuyama
- Graduate School of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Takuya Sugita
- Agricultural Administration Section, Saito City, Miyazaki, Japan
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Abstract
The safety of Lacprodan® BLG, a whey-based protein, was evaluated with respect to genotoxicity and sub-chronic toxicity according to regulatory requirements. Lacprodan® BLG did not show any mutagenic potential in a bacterial reverse mutation assay or any clastogenic or aneugenic potential in an in vitro micronucleus assay performed in human lymphocytes. In a sub-chronic toxicity study, groups of 10 male and 10 female Wistar rats received the test item orally by gavage for 90 days at dose levels of 100, 300 and 1000 mg/kg bw/day. A control group, also including 10 male and 10 female rats, received sterile water, as vehicle. No treatment-related clinical observations or toxicological effects on body or organ weights, food consumption, ophthalmic effects, hematology, clinical chemistry, fertility, urinalysis, or pathology were identified. Therefore, the no-observed-adverse-effect level (NOAEL) for Lacprodan® BLG in the 90-day toxicity study was established as 1000 mg/kg bw/day, corresponding to the highest dose level administered.
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Ong KJ, Ede JD, Pomeroy-Carter CA, Sayes CM, Mulenos MR, Shatkin JA. A 90-day dietary study with fibrillated cellulose in Sprague-Dawley rats. Toxicol Rep 2020; 7:174-182. [PMID: 32021807 PMCID: PMC6994281 DOI: 10.1016/j.toxrep.2020.01.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 01/02/2020] [Accepted: 01/04/2020] [Indexed: 12/31/2022] Open
Abstract
Novel forms of fibrillated cellulose offer improved attributes for use in foods. Conventional cellulose and many of its derivatives are already widely used as food additives and are authorized as safe for use in foods in many countries. However, novel forms have not yet been thoroughly investigated using standardized testing methods. This study assesses the 90-day dietary toxicity of fibrillated cellulose, as compared to a conventional cellulose, Solka Floc. Sprague Dawley rats were fed 2 %, 3 %, or 4 % fibrillated cellulose for 90 consecutive days, and parallel Solka Floc groups were used as controls. Survival, clinical observations, body weight, food consumption, ophthalmologic evaluations, hematology, serum chemistry, urinalysis, post-mortem anatomic pathology, and histopathology were monitored and performed. No adverse observations were noted in relation to the administration of fibrillated cellulose. Under the conditions of this study and based on the toxicological endpoints evaluated, the no-observed-adverse-effect level (NOAEL) for fibrillated cellulose was 2194.2 mg/kg/day (males) and 2666.6 mg/kg/day (females), corresponding to the highest dose tested (4 %) for male and female Sprague Dawley rats. These results demonstrate that fibrillated cellulose behaves similarly to conventional cellulose and raises no safety concerns when used as a food ingredient at these concentrations.
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Key Words
- % RET, percent reticulocyte
- 90-day subchronic study
- ABAS, absolute basophil
- AEOS, absolute eosinophil
- ALB, albumin
- ALKP, alkaline phosphatase
- ALT, alanine aminotransferase
- ALUC, absolute large unstained cell
- ALYM, absolute lymphocyte
- AMON, absolute monocyte
- ANEU, absolute neutrophil
- ANOVA, one-way analysis of variance
- ARET, absolute reticulocyte
- AST, aspartate aminotransferase
- BUN, urea nitrogen
- CAS, Chemical Abstracts Service
- CHOL, cholesterol
- CREAT, creatinine
- Cellulose
- DLS, dynamic light scattering
- EDXS, energy-dispersive X-ray spectroscopy
- EFSA, European Food Safety Authority
- FDA, U.S. Food and Drug Administration
- Fibrillated cellulose
- GLOB, globulin
- GLP, good laboratory practice
- GLU, glucose
- GRAS, generally recognized as safe
- HBG, hemoglobin
- HCT, hematocrit
- MCH, mean corpuscular cell hemoglobin
- MCHC, mean corpuscular cell hemoglobin concentration
- MCV, mean corpuscular cell volume
- NOAEL
- NOAEL, no-observed-adverse-effect level
- OECD 408
- OECD, Organisation for Economic Co-operation and Development
- Oral exposure
- PLT, platelet count
- RBC, red blood cell count
- RDW, red cell distribution width
- SCOGS, Select Committee on GRAS Substances
- SDH, sorbitol dehydrogenase
- SEM, scanning electron microscopy
- TBA, total bile acids
- TBIL, total bilirubin
- TEM, transmission electron microscopy
- TEMPO, 2,2,6,6-tetramethyl-piperidinyloxyl
- TP, total protein
- TRIG, triglycerides
- WBC, white blood cell count
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Affiliation(s)
| | - James D. Ede
- Vireo Advisors, LLC, Boston, MA 02130-4323, United States
| | | | - Christie M. Sayes
- Baylor University, Department of Environmental Science, One Bear Place #97266, Waco, TX 76798- 7266, United States
| | - Marina R. Mulenos
- Baylor University, Department of Environmental Science, One Bear Place #97266, Waco, TX 76798- 7266, United States
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Tanaka W, Yokoyama D, Matsuura Y, Nozaki M, Hirozawa N, Kunitake H, Sakono M, Sakakibara H. Subchronic toxicity evaluation of leaves from rabbiteye blueberry ( Vaccinium virgatum Aiton) in rats. Toxicol Rep 2019; 6:272-278. [PMID: 30984564 PMCID: PMC6444125 DOI: 10.1016/j.toxrep.2019.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 03/11/2019] [Accepted: 03/12/2019] [Indexed: 11/30/2022] Open
Abstract
Blueberry leaf may contain multiple compounds with beneficial effects, but limited about the safety. Powdered blueberry leaf has no toxic event at oral dose of daily 500, 1000 and 2500 mg/kg for 90 days in SD rats. No significant changes in food consumption, body weight gain and organ weights. A daily dose up to 2,500 mg/kg body weight in both the sexes rats may indicate a NOAEL. An acceptable daily intake of blueberry leaf powder for humans is calculated to be 25 mg in dry weight per kg body weight.
Blueberry leaf may contain multiple compounds with beneficial effects. We conducted a 90-day toxicity study in rats to evaluate the safety of consuming the leaves of rabbiteye blueberry (Vaccinium virgatum Aiton; RB species). Powdered leaves were administered daily by oral gavage at doses of 500, 1000, and 2500 mg/kg body weight to male and female Sprague-Dawley rats for 90 days. Treatment did not result in death or changes in the behavior and external appearance of the animals. No alterations were observed in hematological and serum chemical parameters, urinalysis, food consumption, body weight gain, or absolute and relative organ weights at the end of the treatment period, with the exception of some leukocyte percentages in male rats treated with 500 and 1000 mg/kg blueberry leaf powder. The findings indicate that rabbiteye blueberry leaf is safe for consumption and should be investigated as a candidate functional food.
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Affiliation(s)
- Wataru Tanaka
- Graduate School of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki 889-2192, Japan
| | - Daigo Yokoyama
- Graduate School of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki 889-2192, Japan
| | - Yasushi Matsuura
- Miyazaki Prefectural Food Research and Development Center, 16500-2 Sadowara Cho, Miyazaki 880-0303, Japan
| | - Masahiko Nozaki
- SUNAO Pharma Inc., 2-74 Wachigawara, Miyazaki 880-0023, Japan
| | - Naoya Hirozawa
- SUNAO Pharma Inc., 2-74 Wachigawara, Miyazaki 880-0023, Japan
| | - Hisato Kunitake
- Graduate School of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki 889-2192, Japan
| | - Masanobu Sakono
- Graduate School of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki 889-2192, Japan
| | - Hiroyuki Sakakibara
- Graduate School of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadai Nishi, Miyazaki 889-2192, Japan
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Nomura Y, Fukui C, Morishita Y, Haishima Y. A biological study establishing the endotoxin limit for osteoblast and adipocyte differentiation of human mesenchymal stem cells. Regen Ther 2018; 8:46-57. [PMID: 30271865 PMCID: PMC6149188 DOI: 10.1016/j.reth.2018.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/25/2017] [Accepted: 01/09/2018] [Indexed: 01/25/2023] Open
Abstract
INTRODUCTION Multipotent mesenchymal stem cells (MSCs) are widespread in adult organisms and are implicated in tissue maintenance and repair, regulation of hematopoiesis, and immunologic responses. Human (h)MSCs have applications in tissue engineering, cell-based therapy, and medical devices but it is unclear how they respond to unfavorable conditions, such as hypoxia or inflammation after transplantation in vivo. Although endotoxin testing is required for evaluating the quality and safety of transplanted MSCs, no reports on their dose response to endotoxins are available to establish the limits for in vitro MSC culture systems. In the present study, we aimed to accurately quantify the risk of endotoxin contamination in cell culture systems to establish an acceptable endotoxin limit for the differentiation of hMSC osteoblasts and adipocytes. METHODS Three types of bone marrow-derived hMSCs (hMSC-1: 21-year-old, M/B; hMSC-2: 36-year-old, M/B; hMSC-3: 43-year-old, M/C) and adipose-derived stem cells (ADSCs; StemPro Human) were cultured in osteogenic or adipogenic differentiation media, respectively, from commercial kits, containing various concentrations of endotoxin (0.01-100 ng/ml). The degree of adipocyte and osteoblast differentiation was estimated by fluorescent staining of lipid droplets and hydroxyapatite, respectively. To clarify the molecular mechanism underlying the effect of endotoxin on hMSC differentiation, cellular proteins were extracted from cultured cells and subjected to liquid chromatograph-tandem mass spectrometry shotgun proteomics analysis. RESULTS Although endotoxin did not effect the adipocyte differentiation of hMSCs, osteoblast differentiation was enhanced by various endotoxin concentrations: over 1 ng/ml, for hMSC-1; 10 ng/ml, for hMSC-2; and 100 ng/ml, for hMSC-3. Proteomic analysis of hMSC-1 cells revealed up-regulation of many proteins related to bone formation. These results suggested that endotoxin enhances the osteoblast differentiation of MSCs depending on the cell type. CONCLUSIONS Since endotoxins can affect various cellular functions, an endotoxin limit should be established for in vitro MSC cultures. Its no-observed-adverse-effect level was 0.1 ng/ml based on the effect on the hMSC osteoblast differentiation, but it may not necessarily be the limit for ADSCs.
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Affiliation(s)
| | | | | | - Yuji Haishima
- Division of Medical Devices, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
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