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Üremiş MM, Üremiş N, Gül M, Gül S, Çiğremiş Y, Durhan M, Türköz Y. Acrylamide, Applied During Pregnancy and Postpartum Period in Offspring Rats, Significantly Disrupted Myelination by Decreasing the Levels of Myelin-Related Proteins: MBP, MAG, and MOG. Neurochem Res 2024; 49:617-635. [PMID: 37989894 DOI: 10.1007/s11064-023-04053-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 08/06/2023] [Accepted: 10/19/2023] [Indexed: 11/23/2023]
Abstract
Acrylamide (ACR) is a colorless, odorless, and water-soluble solid molecule. In addition to being an important industrial material, ACR is found in fried and baked carbohydrate-rich foods. ACR is regarded as a typical axonal neurotoxin that induces neuropathy. The brain is protected from oxidative damage by vitamin E, which is regarded as the most powerful fat-soluble antioxidant vitamin. This study aimed to reveal the toxic effect of ACR on the development of myelin in the brain at the molecular level and to examine whether Vitamin E has a neuroprotective effect on the harmful effect of ACR. The study was started by dividing 40 pregnant rats into 4 groups and after lactation, the study was continued with offspring rats (females and males offspring rats) from each group. Offspring rats were equally divided into Control, Vitamin E, ACR, ACR + Vitamin E groups. Following the ACR administration, the Water Maze test was applied to evaluate cognitive function. To evaluate the level of demyelination and remyelination, MBP, MAG, and MOG proteins and mRNA levels were performed. In addition, the degeneration of myelin and glial cells was examined by immunohistochemistry and electron microscopic analysis. Analysis results showed that ACR administration decreased gene and protein levels of myelin-related proteins MBP, MAG, and MOG. The findings were confirmed by histopathological, immunohistochemical, and microscopic examinations. The application of vitamin E improved this negative effect of ACR. It has been observed that ACR may play a role in the pathogenesis of myelin-related neurodegenerative diseases by causing demyelination during gestation, lactation, and post-lactation. In addition, it has been understood that vitamin E supports myelination as a strong neuroprotective vitamin against the toxicity caused by ACR. Our research results suggest that acrylamide may play a role in the etiopathogenesis of demyelinating diseases such as multiple sclerosis in humans since fast-food-type nutrition is very common today and people are chronically exposed to acrylamide.
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Affiliation(s)
- Muhammed Mehdi Üremiş
- Department of Medical Biochemistry, Medical Faculty, Inonu University, Malatya, Turkey
| | - Nuray Üremiş
- Department of Medical Biochemistry, Medical Faculty, Inonu University, Malatya, Turkey
| | - Mehmet Gül
- Department of Histology and Embryology, Medical Faculty, Inonu University, Malatya, Turkey
| | - Semir Gül
- Department of Histology and Embryology, Medical Faculty, Inonu University, Malatya, Turkey
| | - Yılmaz Çiğremiş
- Department of Medical Biology and Genetics, Medical Faculty, Inonu University, Malatya, Turkey
| | - Merve Durhan
- Department of Medical Biology and Genetics, Medical Faculty, Inonu University, Malatya, Turkey
| | - Yusuf Türköz
- Department of Medical Biochemistry, Medical Faculty, Inonu University, Malatya, Turkey.
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2
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Muszyński S, Hułas-Stasiak M, Dobrowolski P, Arciszewski MB, Hiżewska L, Donaldson J, Mozel S, Rycerz K, Kapica M, Puzio I, Tomaszewska E. Maternal acrylamide exposure changes intestinal epithelium, immunolocalization of leptin and ghrelin and their receptors, and gut barrier in weaned offspring. Sci Rep 2023; 13:10286. [PMID: 37355724 PMCID: PMC10290718 DOI: 10.1038/s41598-023-37590-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 06/23/2023] [Indexed: 06/26/2023] Open
Abstract
Acrylamide (ACR) is an amide formed as a byproduct in many heat-processed starchy-rich foods. In utero ACR exposure has been associated with restricted fetal growth, but its effects of postnatal functional development of small intestine is completely unknown. The current study investigated the time- and segment-dependent effects of prenatal ACR exposure on morphological and functional development of small intestine in weaned rat offspring. Four groups of pregnant female Wistar rats were exposed to ACR (3 mg/kg b.w./day) for 0, 5, 10 and 15 days during pregnancy. Basal intestinal morphology, immunolocalization of gut hormones responsible for food intake and proteins of intestinal barrier, activity of the intestinal brush border disaccharidases, apoptosis and proliferation in intestinal mucosa were analyzed in offspring at weaning (postnatal day 21). The results showed that in utero ACR exposure disturbs offspring gut structural and functional postnatal development in a time- and segment-depended manner and even a short prenatal exposure to ACR resulted in changes in intestinal morphology, immunolocalization of leptin and ghrelin and their receptors, barrier function, activity of gut enzymes and upregulation of apoptosis and proliferation. In conclusion, prenatal ACR exposure disturbed the proper postnatal development of small intestine.
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Affiliation(s)
- Siemowit Muszyński
- Department of Biophysics, Faculty of Environmental Biology, University of Life Sciences in Lublin, Akademicka St. 13, 20-950, Lublin, Poland
| | - Monika Hułas-Stasiak
- Department of Functional Anatomy and Cytobiology, Faculty of Biology and Biotechnology, Maria Curie-Sklodowska University, Akademicka St. 19, 20-033, Lublin, Poland
| | - Piotr Dobrowolski
- Department of Functional Anatomy and Cytobiology, Faculty of Biology and Biotechnology, Maria Curie-Sklodowska University, Akademicka St. 19, 20-033, Lublin, Poland
| | - Marcin B Arciszewski
- Department of Animal Anatomy and Histology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka St. 12, 20-950, Lublin, Poland
| | - Ligia Hiżewska
- Department of Animal Anatomy and Histology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka St. 12, 20-950, Lublin, Poland
| | - Janine Donaldson
- School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg, 2193, South Africa
| | - Sylwia Mozel
- Department of Animal Anatomy and Histology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka St. 12, 20-950, Lublin, Poland
| | - Karol Rycerz
- Department of Animal Anatomy and Histology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka St. 12, 20-950, Lublin, Poland
| | - Małgorzata Kapica
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka St. 12, 20-950, Lublin, Poland
| | - Iwona Puzio
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka St. 12, 20-950, Lublin, Poland
| | - Ewa Tomaszewska
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka St. 12, 20-950, Lublin, Poland.
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3
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Mojska H, Gielecińska I, Winiarek J, Sawicki W. Acrylamide Content in Breast Milk: The Evaluation of the Impact of Breastfeeding Women's Diet and the Estimation of the Exposure of Breastfed Infants to Acrylamide in Breast Milk. TOXICS 2021; 9:298. [PMID: 34822689 PMCID: PMC8618077 DOI: 10.3390/toxics9110298] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 09/27/2021] [Accepted: 11/04/2021] [Indexed: 11/16/2022]
Abstract
Acrylamide in food is formed by the Maillard reaction. Numerous studies have shown that acrylamide is a neurotoxic and carcinogenic compound. The aim of this study was to determine the level of acrylamide in breast milk at different lactation stages and to evaluate the impact of breastfeeding women's diet on the content of this compound in breast milk. The acrylamide level in breast milk samples was determined by LC-MS/MS. Breastfeeding women's diet was evaluated based on the 24 h dietary recall. The median acrylamide level in colostrum (n = 47) was significantly (p < 0.0005) lower than in the mature milk (n = 26)-0.05 µg/L and 0.14 µg/L, respectively. The estimated breastfeeding women's acrylamide intake from the hospital diet was significantly (p < 0.0001) lower than that from the home diet. We found positive-although modest and borderline significant-correlation between acrylamide intake by breastfeeding women from the hospital diet µg/day) and acrylamide level in the colostrum (µg/L). Acrylamide has been detected in human milk samples, and a positive correlation between dietary acrylamide intake by breastfeeding women and its content in breast milk was observed, which suggests that the concentration can be reduced. Breastfeeding women should avoid foods that may be a source of acrylamide in their diet.
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Affiliation(s)
- Hanna Mojska
- Department of Nutrition and the Nutritive Value of Food, National Institute of Public Health-NIH-National Research Institute, Chocimska 24, 00-791 Warsaw, Poland
- Department of Dietetics and Food Studies, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Waszyngtona 4/8, 42-200 Częstochowa, Poland
| | - Iwona Gielecińska
- Department of Food Safety, National Institute of Public Health, NIH-National Research Institute, Chocimska 24, 00-791 Warsaw, Poland;
| | - Joanna Winiarek
- Chair and Department of Obstetrics, Gynecology and Gynecological Oncology of Medical University of Warsaw, Kondratowicza 8, 03-242 Warsaw, Poland; (J.W.); (W.S.)
| | - Włodzimierz Sawicki
- Chair and Department of Obstetrics, Gynecology and Gynecological Oncology of Medical University of Warsaw, Kondratowicza 8, 03-242 Warsaw, Poland; (J.W.); (W.S.)
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Lindeman B, Johansson Y, Andreassen M, Husøy T, Dirven H, Hofer T, Knutsen HK, Caspersen IH, Vejrup K, Paulsen RE, Alexander J, Forsby A, Myhre O. Does the food processing contaminant acrylamide cause developmental neurotoxicity? A review and identification of knowledge gaps. Reprod Toxicol 2021; 101:93-114. [PMID: 33617935 DOI: 10.1016/j.reprotox.2021.02.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/11/2021] [Accepted: 02/16/2021] [Indexed: 12/15/2022]
Abstract
There is a worldwide concern on adverse health effects of dietary exposure to acrylamide (AA) due to its presence in commonly consumed foods. AA is formed when carbohydrate rich foods containing asparagine and reducing sugars are prepared at high temperatures and low moisture conditions. Upon oral intake, AA is rapidly absorbed and distributed to all organs. AA is a known human neurotoxicant that can reach the developing foetus via placental transfer and breast milk. Although adverse neurodevelopmental effects have been observed after prenatal AA exposure in rodents, adverse effects of AA on the developing brain has so far not been studied in humans. However, epidemiological studies indicate that gestational exposure to AA impair foetal growth and AA exposure has been associated with reduced head circumference of the neonate. Thus, there is an urgent need for further research to elucidate whether pre- and perinatal AA exposure in humans might impair neurodevelopment and adversely affect neuronal function postnatally. Here, we review the literature with emphasis on the identification of critical knowledge gaps in relation to neurodevelopmental toxicity of AA and its mode of action and we suggest research strategies to close these gaps to better protect the unborn child.
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Affiliation(s)
- Birgitte Lindeman
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Ylva Johansson
- Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Mathilda Andreassen
- Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Trine Husøy
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Hubert Dirven
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Tim Hofer
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Helle K Knutsen
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Ida H Caspersen
- Centre for Fertility and Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Kristine Vejrup
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Ragnhild E Paulsen
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, Norway
| | - Jan Alexander
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - Anna Forsby
- Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Oddvar Myhre
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway.
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5
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Kunnel SG, Subramanya S, Satapathy P, Sahoo I, Zameer F. Acrylamide Induced Toxicity and the Propensity of Phytochemicals in Amelioration: A Review. Cent Nerv Syst Agents Med Chem 2020; 19:100-113. [PMID: 30734688 DOI: 10.2174/1871524919666190207160236] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 01/19/2019] [Accepted: 01/29/2019] [Indexed: 12/11/2022]
Abstract
Acrylamide is widely found in baked and fried foods, produced in large amount in industries and is a prime component in toxicity. This review highlights various toxicities that are induced due to acrylamide, its proposed mode of action including oxidative stress cascades and ameliorative mechanisms using phytochemicals. Acrylamide formation, the mechanism of toxicity and the studies on the role of oxidative stress and mitochondrial dysfunctions are elaborated in this paper. The various types of toxicities caused by Acrylamide and the modulation studies using phytochemicals that are carried out on various type of toxicity like neurotoxicity, hepatotoxicity, cardiotoxicity, immune system, and skeletal system, as well as embryos have been explored. Lacunae of studies include the need to explore methods for reducing the formation of acrylamide in food while cooking and also better modulators for alleviating the toxicity and associated dysfunctions along with identifying its molecular mechanisms.
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Affiliation(s)
- Shinomol George Kunnel
- Department of Biotechnology, Dayananda Sagar College of Engineering (An Autonomous Institute Affiliated to VTU, Belagavi), Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru - 560 078, Karnataka, India
| | - Sunitha Subramanya
- Department of Biotechnology, Dayananda Sagar College of Engineering (An Autonomous Institute Affiliated to VTU, Belagavi), Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru - 560 078, Karnataka, India
| | - Pankaj Satapathy
- Department of Biological Sciences, School of Basic and Applied Sciences, Dayananda Sagar University, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru-560 078, Karnataka, India
| | - Ishtapran Sahoo
- Molecular Biology, Thermo Fisher Scientific, Bangalore- 560066, India
| | - Farhan Zameer
- Department of Biological Sciences, School of Basic and Applied Sciences, Dayananda Sagar University, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru-560 078, Karnataka, India
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Allam AA, Othman SI, Mahmoud AM. Deleterious effects of perinatal exposure to potassium bromate on the development of offspring of Swiss mice. Toxicol Ind Health 2019; 35:63-78. [PMID: 30803421 DOI: 10.1177/0748233718814971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The present study aimed to investigate the impact of perinatal potassium bromate (KBrO3) exposure on the development of sensorimotor reflexes and redox status, and on the histological architecture of the brain, liver, and kidney of newborn mice. Pregnant mice received 1-ml bottled drinking water daily by oral intubation and served as the control group. Another group of pregnant mice were supplemented orally with 200 mg/kg body weight KBrO3 dissolved in drinking water from gestation day 5 to postnatal day 21. KBrO3 induced a decrease in the postnatal body weight in the newborn mice. KBrO3-exposed newborn mice showed poor performance and delayed development of the sensorimotor reflexes. Histological changes, increased lipid peroxidation, and altered antioxidants were reported in the cerebrum, cerebellum, medulla oblongata, liver, and kidney of the KBrO3-exposed newborn mice. In conclusion, these findings demonstrated that perinatal exposure to bromate induced oxidative stress, histological and behavioral alterations, and was a potential teratogen in newborn mice.
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Affiliation(s)
- Ahmed A Allam
- 1 Department of Zoology, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - Sarah I Othman
- 2 Department of Biology, Faculty of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Ayman M Mahmoud
- 1 Department of Zoology, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
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Allam AA. Drinking desalinated seawater for a long time induces anomalies in the development of new-born albino rats. Saudi J Biol Sci 2017; 24:1306-1321. [PMID: 28855826 PMCID: PMC5562477 DOI: 10.1016/j.sjbs.2016.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 08/01/2016] [Accepted: 08/19/2016] [Indexed: 12/31/2022] Open
Abstract
The present study aimed to elucidate the abnormalities in the development of rat brains, livers, kidney and behaviours after drinking desalinated seawater prenatally. Three types of drinking water were employed as an experimental probe (bottled water, filtered desalinated seawater and tap desalinated seawater) to investigate neurobehavioral and morphological changes in the development of pup rats. Female rats from each group were administered water from their birth until gestation and lactation. The 1st and 2nd generation pups were divided into three groups: Group C, mothers and pups administered with bottled drinking water (the control group); Group F, mothers and pups administered with filtered drinking water; Group T, mothers and pups administered with unfiltered desalinated seawater (tap water). Morphological changes (CNS aberration) and neurobehavioral changes were studied. The aberrations recorded in the tissues (brain, liver, kidney and spinal cord) of rats from groups T and F may be due to oxidative stress in these tissues such as reduced glutathione, lipid peroxidation, peroxidase and super oxide dismutase. In conclusion, drinking desalinated seawater for a long time may cause teratogenic effects in the development of New-born rats.
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Affiliation(s)
- Ahmed A Allam
- King Saud University, College of Science, Zoology Department, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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Huang WL, Ma YX, Fan YB, Lai SM, Liu HQ, Liu J, Luo L, Li GY, Tian SM. Extract of Ginkgo biloba promotes neuronal regeneration in the hippocampus after exposure to acrylamide. Neural Regen Res 2017; 12:1287-1293. [PMID: 28966643 PMCID: PMC5607823 DOI: 10.4103/1673-5374.213548] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Previous studies have demonstrated a neuroprotective effect of extract of Ginkgo biloba against neuronal damage, but have mainly focused on antioxidation of extract of Ginkgo biloba. To date, limited studies have determined whether extrasct of Ginkgo biloba has a protective effect on neuronal damage. In the present study, acrylamide and 30, 60, and 120 mg/kg extract of Ginkgo biloba were administered for 4 weeks by gavage to establish mouse models. Our results showed that 30, 60, and 120 mg/kg extract of Ginkgo biloba effectively alleviated the abnormal gait of poisoned mice, and up-regulated protein expression levels of doublecortin (DCX), brain-derived neurotrophic factor, and growth associated protein-43 (GAP-43) in the hippocampus. Simultaneously, DCX- and GAP-43-immunoreactive cells increased. These findings suggest that extract of Ginkgo biloba can mitigate neurotoxicity induced by acrylamide, and thereby promote neuronal regeneration in the hippocampus of acrylamide-treated mice.
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Affiliation(s)
- Wei-Ling Huang
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Yu-Xin Ma
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Yu-Bao Fan
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Sheng-Min Lai
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Hong-Qing Liu
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Jing Liu
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Li Luo
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Guo-Ying Li
- Department of Anatomy, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
| | - Su-Min Tian
- Department of Physiology, School of Basic Medicine, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province, China
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Al-Gholam MA, Nooh HZ, El-Mehi AE, El-Barbary AEM, Fokar AZE. Protective effect of rosemary on acrylamide motor neurotoxicity in spinal cord of rat offspring: postnatal follow-up study. Anat Cell Biol 2016; 49:34-49. [PMID: 27051566 PMCID: PMC4819076 DOI: 10.5115/acb.2016.49.1.34] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 02/26/2016] [Accepted: 02/29/2016] [Indexed: 12/17/2022] Open
Abstract
The direct interactive effects of rosemary and acrylamide on the development of motor neurons in the spinal cord remains unknown. Our goal is to confirm the protective effects of rosemary against motor neuronal degeneration induced by acrylamide in the developing postnatal rat spinal cord using a postnatal rat model. We assigned the offspring of treated female rats into control, rosemary; acrylamide group; and recovery groups. This work depended on clinical, histopathological, morphometrically, immunohistochemical and genetic methods. In the acrylamide group, we observed oxidation, motor neuron degeneration, apoptosis, myelin degeneration, neurofilament reduction, reactive gliosis. Whoever, concomitant rosemary intake and withdrawal of acrylamide modulate these effects. These findings proof that dietary rosemary can directly protect motor neuron against acrylamide toxicity in the mammalian developing spinal cord.
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Affiliation(s)
- Marwa A Al-Gholam
- Department of Anatomy and Embryology, Faculty of Medicine, Menoufia University, Shebeen El-Kom, Egypt
| | - Hanaa Zakaria Nooh
- Department of Anatomy and Embryology, Faculty of Medicine, Menoufia University, Shebeen El-Kom, Egypt
| | - Abeer E El-Mehi
- Department of Anatomy and Embryology, Faculty of Medicine, Menoufia University, Shebeen El-Kom, Egypt
| | - Abd El-Moneum El-Barbary
- Department of Anatomy and Embryology, Faculty of Medicine, Menoufia University, Shebeen El-Kom, Egypt
| | - Ahmed Zo El Fokar
- Department of Anatomy and Embryology, Faculty of Medicine, Menoufia University, Shebeen El-Kom, Egypt
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Protective Effect of Parsley Juice (Petroselinum crispum, Apiaceae) against Cadmium Deleterious Changes in the Developed Albino Mice Newborns (Mus musculus) Brain. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:2646840. [PMID: 26966507 PMCID: PMC4761399 DOI: 10.1155/2016/2646840] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 12/13/2015] [Accepted: 12/30/2015] [Indexed: 01/02/2023]
Abstract
Parsley was used as a probe of the current experiment to prevent the behavioral, morphological and biochemical changes in the newborn brain following the administration of cadmium (Cd) to the pregnant mice. The nonanesthetized pregnant mice were given daily parsley juice (Petroselinum crispum) at doses of 20 mg/kg and 10 mg/kg. Pregnant mothers were given Cd at a dose of 30 mg/kg divided into 3 equal times. The newborns have been divided into 6 groups: Group A, mothers did not take treatment; Groups B and C, mothers were treated with low and high dose of parsley, respectively; Group D, mothers were treated only with Cd (perinatal intoxication); Groups E and F, mothers were treated with Cd doses and protected by low and high doses of parsley, respectively. Light microscopy showed that Cd-induced neuronal degeneration by chromatolysis and pyknosis in the brain regions. The low dose of parsley 10 g/kg/day exhibited significant effects in neutralizing and reducing the deleterious changes due to Cd exposure during pregnancy on the behavioral activities, neurotransmitters, oxidative stress, and brain neurons morphology of the mice newborns.
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12
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Şen E, Tunali Y, Erkan M. Testicular development of male mice offsprings exposed to acrylamide and alcohol during the gestation and lactation period. Hum Exp Toxicol 2014; 34:401-14. [DOI: 10.1177/0960327114542883] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Acrylamide (Ac) in the foods and alcohol (Al) in the drinks are unavoidable. Several previous studies demonstrated that these substances which are taken into the body via diet may cause adverse effects in the cells. However, there is no study about how Ac and Al may affect the male reproductive system of the offspring when consumed by the mother during pregnancy and lactation. For this purpose, sexual development in male mice was evaluated after intake of 14 mg/kg Ac and 2 g/kg Al from gestation day 6 to postnatal day (PND) 21. The weight of the offspring was reduced at birth and PND 21 for those exposed to Ac and/or Al. The gonadosomatic index of male offsprings was reduced except for the Ac-treated lactation group. Both substances induced multinuclear giant cells, degenerative cells, atrophic tubules, and maturation-arrested tubules, while decreased Leydig, Sertoli, and spermatogenic cell numbers. Lipid peroxidation level and superoxide dismutase enzyme activity increased in both Al-treated and Ac and Al-treated groups. There was only reduction in the catalase activity during the gestation and lactation periods. These findings suggest that consumption of Ac together with Al may induce impairments on testicular spermatogenesis in male offsprings.
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Affiliation(s)
- E Şen
- Department of Biology, Faculty of Science, Istanbul University, Vezneciler, Istanbul, Turkey
| | - Y Tunali
- Department of Biology, Faculty of Science, Istanbul University, Vezneciler, Istanbul, Turkey
| | - M Erkan
- Department of Biology, Faculty of Science, Istanbul University, Vezneciler, Istanbul, Turkey
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13
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El-Bakry AM, Abdul-Hamid M, Allam A. Prenatal and perinatal exposure of acrylamide disrupts the development of spinal cord in rats. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/wjns.2013.31003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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LoPachin RM, Gavin T. Molecular mechanism of acrylamide neurotoxicity: lessons learned from organic chemistry. ENVIRONMENTAL HEALTH PERSPECTIVES 2012; 120:1650-7. [PMID: 23060388 PMCID: PMC3548275 DOI: 10.1289/ehp.1205432] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 09/24/2012] [Indexed: 05/21/2023]
Abstract
BACKGROUND Acrylamide (ACR) produces cumulative neurotoxicity in exposed humans and laboratory animals through a direct inhibitory effect on presynaptic function. OBJECTIVES In this review, we delineate how knowledge of chemistry provided an unprecedented understanding of the ACR neurotoxic mechanism. We also show how application of the hard and soft, acids and bases (HSAB) theory led to the recognition that the α,β-unsaturated carbonyl structure of ACR is a soft electrophile that preferentially forms covalent bonds with soft nucleophiles. METHODS In vivo proteomic and in chemico studies demonstrated that ACR formed covalent adducts with highly nucleophilic cysteine thiolate groups located within active sites of presynaptic proteins. Additional research showed that resulting protein inactivation disrupted nerve terminal processes and impaired neurotransmission. DISCUSSION ACR is a type-2 alkene, a chemical class that includes structurally related electrophilic environmental pollutants (e.g., acrolein) and endogenous mediators of cellular oxidative stress (e.g., 4-hydroxy-2-nonenal). Members of this chemical family produce toxicity via a common molecular mechanism. Although individual environmental concentrations might not be toxicologically relevant, exposure to an ambient mixture of type-2 alkene pollutants could pose a significant risk to human health. Furthermore, environmentally derived type-2 alkenes might act synergistically with endogenously generated unsaturated aldehydes to amplify cellular damage and thereby accelerate human disease/injury processes that involve oxidative stress. CONCLUSIONS These possibilities have substantial implications for environmental risk assessment and were realized through an understanding of ACR adduct chemistry. The approach delineated here can be broadly applied because many toxicants of different chemical classes are electrophiles that produce toxicity by interacting with cellular proteins.
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Affiliation(s)
- Richard M LoPachin
- Department of Anesthesiology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York 10467 , USA.
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Structural and ultrastructural evidence of neurotoxic effects of fried potato chips on rat postnatal development. Nutrition 2012; 27:1066-75. [PMID: 21907898 DOI: 10.1016/j.nut.2011.06.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 06/15/2011] [Accepted: 06/16/2011] [Indexed: 01/11/2023]
Abstract
OBJECTIVE Acrylamide (ACR), a proved rodent carcinogen and neurotoxic agent, is present in significant quantities in commonly consumed foods such as fried potato chips (FPC) and French fries, raising a health concern worldwide. We investigated and compared the neurotoxic effects of ACR and FPC on postnatal development. METHODS Female rats were treated with ACR (30 mg/kg of body weight), fed a diet containing approximately 30% of FPC during pregnancy, or fed a standard diet (control) and their offspring were examined. RESULTS Female rats treated with ACR or fed a diet containing FPC during pregnancy gave birth to litters with delayed growth and decreased body and brain weights. Light microscopic studies of the cerebellar cortex of treated animals revealed drastic decreases in Purkinje cells and internal granular layers. Different patterns of cell death were detected in Purkinje cells and neurons in the brains of pups born to treated mothers. Ultrastructural analysis of Purkinje cells revealed changes in the endoplasmic reticulum, loss of the normal arrangement of polyribosomes, swollen mitochondria with abnormally differentiated cristae, and an abnormal Golgi apparatus. The gastrocnemius muscle in the ACR and FPC groups showed extensive degeneration of myofibrils as evidenced by poorly differentiated A, H, and Z bands. CONCLUSION The present study reveals for the first time that rat fetal exposure to ACR, as a pure compound or from a maternal diet of FPC, causes cerebellar cortical defects and myodegeneration of the gastrocnemius muscle during the postnatal development of pups. These results warrant a systematic study of the health effects of the consumption of FPC and French fries in the general population.
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Ogawa B, Wang L, Ohishi T, Taniai E, Akane H, Suzuki K, Mitsumori K, Shibutani M. Reversible aberration of neurogenesis targeting late-stage progenitor cells in the hippocampal dentate gyrus of rat offspring after maternal exposure to acrylamide. Arch Toxicol 2012; 86:779-90. [DOI: 10.1007/s00204-012-0801-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Accepted: 01/04/2012] [Indexed: 11/30/2022]
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Takami S, Imai T, Cho YM, Ogawa K, Hirose M, Nishikawa A. Juvenile rats do not exhibit elevated sensitivity to acrylamide toxicity after oral administration for 12 weeks. J Appl Toxicol 2011; 32:959-67. [DOI: 10.1002/jat.1686] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2010] [Revised: 03/10/2011] [Accepted: 03/11/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Shigeaki Takami
- Division of Pathology; National Institute of Health Sciences; 1-18-1 Kamiyoga, Setagaya-ku; Tokyo; 158-8501; Japan
| | | | - Young-Man Cho
- Division of Pathology; National Institute of Health Sciences; 1-18-1 Kamiyoga, Setagaya-ku; Tokyo; 158-8501; Japan
| | - Kumiko Ogawa
- Division of Pathology; National Institute of Health Sciences; 1-18-1 Kamiyoga, Setagaya-ku; Tokyo; 158-8501; Japan
| | - Masao Hirose
- Division of Pathology; National Institute of Health Sciences; 1-18-1 Kamiyoga, Setagaya-ku; Tokyo; 158-8501; Japan
| | - Akiyoshi Nishikawa
- Division of Pathology; National Institute of Health Sciences; 1-18-1 Kamiyoga, Setagaya-ku; Tokyo; 158-8501; Japan
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18
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Allam A, El-Ghareeb AA, Abdul-Hamid M, Baikry A, Sabri MI. Prenatal and perinatal acrylamide disrupts the development of cerebellum in rat: Biochemical and morphological studies. Toxicol Ind Health 2011; 27:291-306. [DOI: 10.1177/0748233710386412] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Acrylamide is known to cause neurotoxicity in the experimental animals and humans. The literature on its neurotoxic effect in the adult animals is huge, but the effect of acrylamide on the embryonic and postnatal development is relatively less understood. The present study examined its effects on the development of external features and cerebellum in albino rats. Acrylamide was orally administered to non-anesthetized pregnant females by gastric intubation 10 mg/kg/day. The animals were divided into three groups as follows. (1) Group A, newborn from control animals; (2) Group B; newborns from mothers treated with acrylamide from day 7 (D7) of gestation till birth (prenatal intoxicated group); (3) Group C; newborns from mothers treated with acrylamide from D7 of gestation till D28 after birth (perinatally intoxicated group). Acrylamide administered either prenatally or perinatally has been shown to induce significant retardation in the newborns’ body weights development, increase of thiobarbituric acid-reactive substances (TBARS) and oxidative stress (significant reductions in glutathione reduced [GSH], total thiols, superoxide dismutase [SOD] and peroxidase activities) in the developing cerebellum. Acrylamide treatment delayed the proliferation in the granular layer and delayed both cell migration and differentiation. Purkinje cell loss was also seen in acrylamide-treated animals. Ultrastructural studies of Purkinje cells in the perinatal group showed microvacuolations and cell loss. The results of this study show that prenatal and perinatal acrylamide or its metabolites disrupts the biochemical machinery, cause oxidative stress and induce structural changes in the developing rat cerebellum.
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Affiliation(s)
- A. Allam
- Department of Zoology, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt,
| | - AA El-Ghareeb
- Department of Zoology, Faculty of Science, Cairo University, Cairo, Egypt
| | - M. Abdul-Hamid
- Department of Zoology, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - A. Baikry
- Department of Zoology, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - MI Sabri
- Center for Research on Occupational and Environmental Toxicology, Oregon Health & Science University, Portland Oregon, USA
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19
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Disruptive neuronal development by acrylamide in the hippocampal dentate hilus after developmental exposure in rats. Arch Toxicol 2010; 85:987-94. [DOI: 10.1007/s00204-010-0622-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Accepted: 11/09/2010] [Indexed: 11/25/2022]
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Abstract
Contaminants are a vast subject area of food safety and quality and can be present in our food chain from raw materials to finished products. Acrylamide, an α,β-unsaturated (conjugated) reactive molecule, can be detected as a contaminant in several foodstuffs including baby foods and infant formulas. It is anticipated that children will generally have intakes that are two to three times those of adults when expressed on a body-weight basis. Though exposure to acrylamide is inevitable, it is necessary to protect infant and children from high exposure. The present review focuses on the several adverse health effects of acrylamide including mutagenicity, genotoxicity, carcinogenicity, neurotoxicity and reproductive toxicity, and the possible outcomes of childhood exposure from baby foods and infant formulas.
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Allam AA, El-Ghareeb AW, Abdul-Hamid M, Bakery AE, Gad M, Sabri M. Effect of prenatal and perinatal acrylamide on the biochemical and morphological changes in liver of developing albino rat. Arch Toxicol 2009; 84:129-41. [PMID: 19862503 DOI: 10.1007/s00204-009-0475-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2009] [Accepted: 10/08/2009] [Indexed: 11/24/2022]
Abstract
Acrylamide has been employed as an experimental probe to investigate biochemical and morphological changes in developing rat liver following toxin administration in pregnant rats. Non-anesthetized pregnant rats were given acrylamide by gastric intubation at a dose of 10 mg/kg/day. The pups were divided into three groups: Group A, mothers were treated with saline (control group); Group B, mothers were treated with acrylamide from day D7 of gestation till birth (prenatal intoxication); Group C, mothers were treated with acrylamide from D7 of gestation to D28 after birth (perinatal intoxication). Acrylamide-induced biochemical changes (in liver and serum) and morphological changes (in liver) were studied in control and acrylamide-treated developing pups. Prenatally and perinatally administered acrylamide significantly increased lipid peroxidation and reduced glutathione and total thiol levels in liver. Significant inhibition of peroxidase and superoxide dismutase activities was observed in liver tissue. Total lipids including cholesterol and triglycerides were significantly increased in the serum. Acrylamide treatment increased serum alanine aminotransferase and aspartate aminotransferase activities and inhibited alkaline phosphatase activity. Sodium and potassium concentrations were increased, but calcium, phosphorus and iron levels were significantly reduced in the serum. Acrylamide produced significant electrophoretic changes in serum proteins. The most noticeable change was splitting of beta-globulin into beta1- and beta2-globulins. Light microscopy showed acrylamide-induced fatty deposits, congested central vein, vacuolization and chromatolysis in hepatocytes. Ultrastructural studies revealed vacuolated cytoplasm, lipid droplets of variable size and mitochondria with damaged cristae and vacuolization. The nuclei in acrylamide-treated groups showed marked decrease in the staining of nuclear DNA.
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Affiliation(s)
- Ahmed Aly Allam
- Zoology Department, Faculty of Science, Beni-Suef University, Beni Suef, Egypt.
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22
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Maronpot RR, Zeiger E, McConnell EE, Kolenda-Roberts H, Wall H, Friedman MA. Induction of tunica vaginalis mesotheliomas in rats by xenobiotics. Crit Rev Toxicol 2009; 39:512-37. [DOI: 10.1080/10408440902969430] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Limited lactational transfer of acrylamide to rat offspring on maternal oral administration during the gestation and lactation periods. Arch Toxicol 2009; 83:785-93. [DOI: 10.1007/s00204-009-0418-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2008] [Accepted: 02/18/2009] [Indexed: 10/21/2022]
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Takahashi M, Shibutani M, Inoue K, Fujimoto H, Hirose M, Nishikawa A. Pathological assessment of the nervous and male reproductive systems of rat offspring exposed maternally to acrylamide during the gestation and lactation periods - a preliminary study. J Toxicol Sci 2008; 33:11-24. [DOI: 10.2131/jts.33.11] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Miwa Takahashi
- Division of Pathology, National Institute of Health Sciences
| | - Makoto Shibutani
- Division of Pathology, National Institute of Health Sciences
- Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology
| | - Kaoru Inoue
- Division of Pathology, National Institute of Health Sciences
| | | | - Masao Hirose
- Division of Pathology, National Institute of Health Sciences
- Food Safety Commission
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Crofton KM, Foss JA, Hass U, Jensen KF, Levin ED, Parker SP. Undertaking positive control studies as part of developmental neurotoxicity testing: a report from the ILSI Research Foundation/Risk Science Institute expert working group on neurodevelopmental endpoints. Neurotoxicol Teratol 2007; 30:266-87. [PMID: 17681747 DOI: 10.1016/j.ntt.2007.06.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2007] [Revised: 04/26/2007] [Accepted: 06/07/2007] [Indexed: 10/23/2022]
Abstract
Developmental neurotoxicity testing involves functional and neurohistological assessments in offspring during and following maternal and/or neonatal exposure. Data from positive control studies are an integral component in developmental neurotoxicity risk assessments. Positive control data are crucial for evaluating a laboratory's capability to detect chemical-induced changes in measured endpoints. Positive control data are also valuable in a weight-of-evidence approach to help determine the biological significance of results and provide confidence in negative results from developmental neurotoxicity (DNT) studies. This review is a practical guide for the selection and use of positive control agents in developmental neurotoxicology. The advantages and disadvantages of various positive control agents are discussed for the endpoints in developmental neurotoxicity studies. Design issues specific to positive control studies in developmental neurotoxicity are considered and recommendations on how to interpret and report positive control data are made. Positive control studies should be conducted as an integral component of the incorporation and use of developmental neurotoxicity testing methods in laboratories that generate data used in risk decisions.
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Affiliation(s)
- Kevin M Crofton
- Neurotoxicology Division, NHEERL, ORD, US EPA, Research Triangle Park, NC, USA.
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Shipp A, Lawrence G, Gentry R, McDonald T, Bartow H, Bounds J, Macdonald N, Clewell H, Allen B, Van Landingham C. Acrylamide: review of toxicity data and dose-response analyses for cancer and noncancer effects. Crit Rev Toxicol 2006; 36:481-608. [PMID: 16973444 DOI: 10.1080/10408440600851377] [Citation(s) in RCA: 159] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Acrylamide (ACR) is used in the manufacture of polyacrylamides and has recently been shown to form when foods, typically containing certain nutrients, are cooked at normal cooking temperatures (e.g., frying, grilling or baking). The toxicity of ACR has been extensively investigated. The major findings of these studies indicate that ACR is neurotoxic in animals and humans, and it has been shown to be a reproductive toxicant in animal models and a rodent carcinogen. Several reviews of ACR toxicity have been conducted and ACR has been categorized as to its potential to be a human carcinogen in these reviews. Allowable levels based on the toxicity data concurrently available had been developed by the U.S. EPA. New data have been published since the U.S. EPA review in 1991. The purpose of this investigation was to review the toxicity data, identify any new relevant data, and select those data to be used in dose-response modeling. Proposed revised cancer and noncancer toxicity values were estimated using the newest U.S. EPA guidelines for cancer risk assessment and noncancer hazard assessment. Assessment of noncancer endpoints using benchmark models resulted in a reference dose (RfD) of 0.83 microg/kg/day based on reproductive effects, and 1.2 microg/kg/day based on neurotoxicity. Thyroid tumors in male and female rats were the only endpoint relevant to human health and were selected to estimate the point of departure (POD) using the multistage model. Because the mode of action of acrylamide in thyroid tumor formation is not known with certainty, both linear and nonlinear low-dose extrapolations were conducted under the assumption that glycidamide or ACR, respectively, were the active agent. Under the U.S. EPA guidelines (2005), when a chemical produces rodent tumors by a nonlinear or threshold mode of action, an RfD is calculated using the most relevant POD and application of uncertainty factors. The RfD was estimated to be 1.5 microg/kg/day based on the use of the area under the curve (AUC) for ACR hemoglobin adducts under the assumption that the parent, ACR, is the proximate carcinogen in rodents by a nonlinear mode of action. When the mode of action in assumed to be linear in the low-dose region, a risk-specific dose corresponding to a specified level of risk (e.g., 1 x 10-5) is estimated, and, in the case of ACR, was 9.5 x 10-2 microg ACR/kg/day based on the use of the AUC for glycidamide adduct data. However, it should be noted that although this review was intended to be comprehensive, it is not exhaustive, as new data are being published continuously.
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Affiliation(s)
- A Shipp
- ENVIRON International Corporation, 602 East Georgia Street, Ruston, LA 07290, USA.
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27
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Exon JH. A review of the toxicology of acrylamide. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2006; 9:397-412. [PMID: 17492525 DOI: 10.1080/10937400600681430] [Citation(s) in RCA: 167] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Acrylamide (ACR) is a chemical used in many industries around the world and more recently was found to form naturally in foods cooked at high temperatures. Acrylamide was shown to be a neurotoxicant, reproductive toxicant, and carcinogen in animal species. Only the neurotoxic effects were observed in humans and only at high levels of exposure in occupational settings. The mechanism underlying neurotoxic effects of ACR may be basic to the other toxic effects seen in animals. This mechanism involves interference with the kinesin-related motor proteins in nerve cells or with fusion proteins in the formation of vesicles at the nerve terminus and eventual cell death. Neurotoxicity and resulting behavioral changes can affect reproductive performance of ACR-exposed laboratory animals with resulting decreased reproductive performance. Further, the kinesin motor proteins are important in sperm motility, which could alter reproduction parameters. Effects on kinesin proteins could also explain some of the genotoxic effects on ACR. These proteins form the spindle fibers in the nucleus that function in the separation of chromosomes during cell division. This could explain the clastogenic effects of the chemical noted in a number of tests for genotoxicity and assays for germ cell damage. Other mechanisms underlying ACR-induced carcinogenesis or nerve toxicity are likely related to an affinity for sulfhydryl groups on proteins. Binding of the sulfhydryl groups could inactive proteins/enzymes involved in DNA repair and other critical cell functions. Direct interaction with DNA may or may not be a major mechanism for cancer induction in animals. The DNA adducts that form do not correlate with tumor sites and ACR is mostly negative in gene mutation assays except at high doses that may not be achievable in the diet. All epidemiologic studies fail to show any increased risk of cancer from either high-level occupational exposure or the low levels found in the diet. In fact, two of the epidemiologic studies show a decrease in cancer of the large bowel. A number of risk assessment studies were performed to estimate increased cancer risk. The results of these studies are highly variable depending on the model. There is universal consensus among international food safety groups in all countries that examined the issue of ACR in the diet that not enough information is available at this time to make informed decisions on which to base any regulatory action. Too little is known about levels of this chemical in different foods and the potential risk from dietary exposure. Avoidance of foods containing ACR would result in worse health issues from an unbalanced diet or pathogens from under cooked foods. There is some consensus that low levels of ACR in the diet are not a concern for neurotoxicity or reproductive toxicity in humans, although further research is need to study the long-term, low-level cumulative effects on the nervous system. Any relationship to cancer risk from dietary exposure is hypothetical at this point and awaits more definitive studies.
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Affiliation(s)
- J H Exon
- Department of Food Science and Toxicology, University of Idaho, Moscow, Idaho 83844, USA.
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Manson J, Brabec MJ, Buelke-Sam J, Carlson GP, Chapin RE, Favor JB, Fischer LJ, Hattis D, Lees PSJ, Perreault-Darney S, Rutledge J, Smith TJ, Tice RR, Working P. NTP-CERHR expert panel report on the reproductive and developmental toxicity of acrylamide. ACTA ACUST UNITED AC 2005; 74:17-113. [PMID: 15729727 DOI: 10.1002/bdrb.20030] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jeanne Manson
- University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Garey J, Ferguson SA, Paule MG. Developmental and behavioral effects of acrylamide in Fischer 344 rats. Neurotoxicol Teratol 2005; 27:553-63. [PMID: 16087067 DOI: 10.1016/j.ntt.2005.03.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2004] [Revised: 03/10/2005] [Accepted: 03/21/2005] [Indexed: 10/25/2022]
Abstract
Human exposures to acrylamide (ACR), a known neurotoxicant, can occur via a variety of substances, including cigarette smoke and the ingestion of certain carbohydrate-based foods cooked at high temperatures. In this study, Fischer 344 sperm plug-positive female rats were treated daily with ACR (0, 0.5, 1.0, 2.5, 5.0 or 10.0 mg/kg/day) by gavage beginning on gestation day 7. Dosing of dams ended when litters were born; pups received daily gavage at the same dose as their dam from postnatal day (PND) 1 through PND22. Pups were tested using a battery of behavioral assessments from PNDs 4-22. Statistically significant decreases in body weight were observed in pups exposed to ACR at doses as low as 1.0 mg/kg/day (treatmentxday; repeated measures ANOVA, P<0.0001). No statistically significant differences among treatment groups were observed in righting reflex, forelimb hang, or open field measures of activity. Statistically significant effects of ACR were observed at the 10 mg/kg/day dose on negative geotaxis performance (P<0.01) and a linear trend in fall-time latencies on Rotarod performance on PNDs 21-22 (P<0.05), with higher doses producing shorter latencies. These results suggest that ACR exposure produces deficits in development and motor coordination that are observable before weaning.
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Affiliation(s)
- Joan Garey
- Division of Neurotoxicology, HFT-132, National Center for Toxicological Research, 3900 NCTR Rd., Jefferson, AR 72079-9502, USA.
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Kienzle E, Ranz D, Thielen C, Jezussek M, Schieberle P. Carry over (transfer) of feed-borne acrylamide into eggs, muscle, serum, and faeces - a pilot study with Japanese quails (Coturnix coturnix japonica). J Anim Physiol Anim Nutr (Berl) 2005; 89:79-83. [PMID: 15787975 DOI: 10.1111/j.1439-0396.2005.00550.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Two groups of 10 quails each were fed for 30 days on a diet containing either 663 microg feed-borne acrylamide (AA)/kg feed (group B) or 2472 microg AA/kg feed (group C) respectively. The concentrations of AA present in excreta and eggs were compared with those measured in eggs and excreta obtained from a control group (group A) fed on a diet low in AA (<10 microg/kg). The results clearly showed that the eggs of quails in group C contained approximately 53-112 microg AA/kg based on dry weight, while eggs collected from group A did not contain AA (limit of detection in eggs 3.5 microg/kg). Nearly 5% of the AA fed was recovered in the excreta. The AA concentrations in liver, muscle and serum were detectable, but below the limit of quantitation.
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Affiliation(s)
- E Kienzle
- Lehrstuhl für Tierernährung und Diätetik der LMU München, Schönleutnerstrasse 8, 85764 Oberschleissheim, Germany.
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Schettgen T, Kütting B, Hornig M, Beckmann MW, Weiss T, Drexler H, Angerer J. Trans-placental exposure of neonates to acrylamide--a pilot study. Int Arch Occup Environ Health 2004; 77:213-6. [PMID: 14740221 DOI: 10.1007/s00420-003-0496-8] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2003] [Accepted: 11/14/2003] [Indexed: 10/26/2022]
Abstract
OBJECTIVES Acrylamide (AA) (CAS No 79-06-1) has most recently been identified as a food-borne toxicant generated during the heating process of starch-containing foods. It was the aim of the present study to investigate the trans-placental exposure of newborn infants to this possible human carcinogen by analysis of the specific haemoglobin adduct of AA ( N-2-carbamoylethylvaline, AAV) in the blood of mothers and the corresponding umbilical cord blood of neonates as a parameter of biochemical effects. METHODS We investigated the blood of 11 women advanced in pregnancy (one smoker, ten non-smokers) and the corresponding umbilical cord blood of neonates for the N-terminal haemoglobin adducts of AA (AAV) and the smoking-specific adduct of acrylonitrile (CAS No 107-13-1) ( N-cyanoethylvaline, CEV). The limit of detection (LOD) was 5 pmol/g globin for AAV and 4 pmol/g globin for CEV. RESULTS AAV could be determined in all blood samples of the mothers (median 21 pmol/g globin, range 18-104 pmol/g globin) as well as in the umbilical cord blood of neonates (median 10 pmol/g globin, range 6-43 pmol/g globin). The highest values were detected in the blood of the smoking mother and her child. CEV was detected only in the blood of the smoking mother (185 pmol/g globin) and the corresponding umbilical cord blood (69 pmol/g globin). DISCUSSION AAV adduct levels in non-smoking mothers and neonates showed a good correlation (r=0.859). The concentration of AA adducts in the blood of neonates is approximately 50% of the adduct level found in the blood of the mother. In view of the shorter life span of neonatal erythrocytes and the lower body weight of newborn infants, the relative internal dose of AA in neonates (in microgrammes per kilogramme body weight) must be assumed to be at least equal to that of the mother. Because of the high cell-replication rates during foetal development, trans-placental exposure of neonates to AA might raise concerns. Neonates of smoking mothers take up much higher doses of AA than those of non-smoking mothers.
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Affiliation(s)
- T Schettgen
- Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, University of Erlangen-Nuremberg, Schillerstrasse 25/29, 91054 Erlangen, Germany
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Abstract
Distal swelling and eventual degeneration of axons in the CNS and PNS have been considered to be the characteristic neuropathological features of acrylamide (ACR) neuropathy. These axonopathic changes have been the basis for classifying ACR neuropathy as a central-peripheral distal axonopathy and, accordingly, research over the past 30 years has focused on the primacy of axon damage and on deciphering underlying mechanisms. However, based on accumulating evidence, we have hypothesized that nerve terminals, and not axons, are the primary site of ACR action and that compromise of corresponding function is responsible for the autonomic, sensory, and motor defects that accompany ACR intoxication (NeuroToxicology 23 (2002) 43). In this paper, we provide a review of data from a recently completed comprehensive, longitudinal silver stain study of brain and spinal cord from rats intoxicated with ACR at two different daily dosing rates, i.e., 50 mg/kg/day, ip or 21 mg/kg/day, po. Results show that, regardless of dose-rate, ACR intoxication was associated with early, progressive nerve terminal degeneration in all CNS regions and with Purkinje cell injury in cerebellum. At the lower dose-rate, initial nerve terminal argyrophilia was followed by abundant retrograde axon degeneration in white matter tracts of spinal cord, brain stem, and cerebellum. The results support and extend our nerve terminal hypothesis and suggest that Purkinje cell damage also plays a role in ACR neurotoxicity. Substantial evidence now indicates that axon degeneration is a secondary effect and is, therefore, not pathophysiologically significant. These findings have important implications for future mechanistic research, classification schemes, and assessment of neurotoxicity risk.
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Affiliation(s)
- R M LoPachin
- Department of Anesthesiology, Albert Einstein College of Medicine, Montefiore Medical Center, 111 E. 210th St., Bronx, NY 10467, USA.
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33
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Friedman MA, Beliles RP. Three-generation reproduction study of rats receiving acrylonitrile in drinking water. Toxicol Lett 2002; 132:249-61. [PMID: 12044706 DOI: 10.1016/s0378-4274(02)00075-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Acrylonitrile, a high volume organic chemical, was tested for reproductive effects in a three generation drinking water study with two matings per generation. Sprague-Dawley rats were exposed to acrylonitrile in drinking water at 0, 100, or 500 ppm. This corresponds to 0, 11+/-5 and 37+/-10 mg/kg, respectively, for males and 0, 20+/-3 and 40+/-8 mg/kg per day for the females, respectively. Water consumption was reduced in F0 rats in the 100 and 500 ppm groups. At 500 ppm, acrylonitrile reduced body weight gain and food intake of the first generation parental rats (F0). These parameters were not investigated at subsequent generations. The pup survival (both viability and lactation indices) was reduced at the 500 ppm treatment level in both matings of all three generations. Fostering the 500 ppm pups onto untreated mothers following the second mating lessened mortality, suggesting a maternal effect consistent with decreased water consumption. There was no remarkable change in the reproductive capacity in any of matings in rats at the 100 ppm concentration. In contrast, in all three generations, the body weights of the pups of the 500 ppm treatment level were reduced on Day 21 at both matings. No adverse findings were observed in the tissues of a limited number of third generation weanlings (F3b) upon gross and microscopic evaluation. No effect on the sciatic nerve was evident among the adult female rats held for 20 weeks after weaning of the second litter. There was a dose-related effect of acrylonitrile on gross masses in female rats at each parental generation held 20 weeks after the weaning of the second litter. Histopathological evaluation of these dams showed an increase in astrocytomas and zymbal gland tumors.
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Affiliation(s)
- M A Friedman
- Department of Pharmacology and Physiology, University of Medicine and Dentistry of New Jersey, Newark, USA.
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34
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LoPachin RM, Ross JF, Lehning EJ. Nerve terminals as the primary site of acrylamide action: a hypothesis. Neurotoxicology 2002; 23:43-59. [PMID: 12164547 DOI: 10.1016/s0161-813x(01)00074-2] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Acrylamide (ACR) is considered to be prototypical among chemicals that cause a central-peripheral distal axonopathy. Multifocal neurofilamentous swellings and eventual degeneration of distal axon regions in the CNS and PNS have been traditionally considered the hallmark morphological features of this axonopathy. However, ACR has also been shown to produce early nerve terminal degeneration of somatosensory, somatomotor and autonomic nerve fibers under a variety of dosing conditions. Recent research from our laboratory has demonstrated that terminal degeneration precedes axonopathy during low-dose subchronic induction of neurotoxicity and occurs in the absence of axonopathy during higher-dose subacute intoxication. This relationship suggests that nerve terminal degeneration, and not axonopathy, is the primary or most important pathophysiologic lesion produced by ACR. In this hypothesis paper, we review evidence suggesting that nerve terminal degeneration is the hallmark lesion of ACR neurotoxicity, and we propose that this effect is mediated by the direct actions of ACR at nerve terminal sites. ACR is an electrophile and, therefore, sulfhydryl groups on presynaptic proteins represent rational molecular targets. Several presynaptic thiol-containing proteins (e.g. SNAP-25, NSF) are critically involved in formation of SNARE (soluble N-ethylmaleimide (NEM)-sensitive fusion protein receptor) complexes that mediate membrane fusion processes such as exocytosis and turnover of plasmalemmal proteins and other constituents. We hypothesize that ACR adduction of SNARE proteins disrupts assembly of fusion core complexes and thereby interferes with neurotransmission and presynaptic membrane turnover. General retardation of membrane turnover and accumulation of unincorporated materials could result in nerve terminal swelling and degeneration. A similar mechanism involving the long-term consequences of defective SNARE-based turnover of Na+/K(+)-ATPase and other axolemmal constituents might explain subchronic induction of axon degeneration. The ACR literature occupies a prominent position in neurotoxicology and has significantly influenced development of mechanistic hypotheses and classification schemes for neurotoxicants. Our proposal suggests a reevaluation of current classification schemes and mechanistic hypotheses that regard ACR axonopathy as a primary lesion.
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Affiliation(s)
- R M LoPachin
- Department of Anesthesiology, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY 10467, USA.
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