1
|
Tsai HJ, Kuo FC, Wu CF, Sun CW, Hsieh CJ, Wang SL, Chen ML, Hsieh HM, Chuang YS, Wu MT. Association between two common environmental toxicants (phthalates and melamine) and urinary markers of renal injury in the third trimester of pregnant women: The Taiwan Maternal and Infant Cohort Study (TMICS). CHEMOSPHERE 2021; 272:129925. [PMID: 35534976 DOI: 10.1016/j.chemosphere.2021.129925] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/17/2021] [Accepted: 02/06/2021] [Indexed: 05/26/2023]
Abstract
BACKGROUND Exposure to either melamine or phthalate, two common toxicants, during pregnancy may cause adverse health effects, including kidney damage. OBJECTIVES We investigated the independent and interactive effect of exposure to melamine and phthalates, particularly di-(2-ethylhexyl) phthalate (DEHP), on markers of early renal injury in women their third trimester of pregnancy in one nationwide birth cohort, the Taiwan Maternal and Infant Cohort Study (TMICS). METHODS Between October, 2012 and May, 2015, participants were administered questionnaires, physical examinations, and blood and urine tests during their third trimester. One-spot overnight urine specimens were used to simultaneously measure melamine, 11 phthalate metabolites, and two markers of renal injury, microalbumin and N-acetyl-beta-D-glucosaminidas (NAG). Estimated daily DEHP intake was calculated based on measurement of three urinary DEHP metabolites. Microalbuminuria was defined as having a urinary albumin/creatinine ratio (ACR) higher than 3.5 mg/mmol. RESULTS Total 1433 pregnant women were analyzed. The median value for urinary melamine was 0.63 μg/mmol Cr and estimated DEHP intake was 1.84 μg/kg/day. We found subjects in the highest quartile of estimated DEHP intake to have significantly higher urinary ACR (β = 0.095, p = 0.043) and the prevalence of microalbuminuria (adjusted OR = 1.752, 95% confidence interval = 1.118-2.746), compared to those in the lowest quartile. In addition, there was a significant interactive effect between urinary melamine and estimated DEHP intake on urinary ACR and NAG. CONCLUSION Our results suggest these two ubiquitous chemicals together may be associated with markers of early kidney injury in pregnant women.
Collapse
Affiliation(s)
- Hui-Ju Tsai
- Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Family Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Fu-Chen Kuo
- School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan; Department of Obstetrics & Gynecology, E-Da Hospital, Kaohsiung, Taiwan
| | - Chia-Fang Wu
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chien-Wen Sun
- National Environmental Health Research Center, National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Chia-Jung Hsieh
- Department of Public Health, Tzu Chi University, Hualien, Taiwan
| | - Shu-Li Wang
- National Environmental Health Research Center, National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Mei-Lien Chen
- Institute of Environmental and Occupational Health Sciences, College of Medicine, National Yang Ming University, Taipei, Taiwan
| | - Hui-Min Hsieh
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Department of Family Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yun-Shiuan Chuang
- Department of Family Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ming-Tsang Wu
- Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Family Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; PhD Program of Environmental and Occupational Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
| |
Collapse
|
2
|
Zhao Y, Du ZH, Talukder M, Lin J, Li XN, Zhang C, Li JL. Crosstalk between unfolded protein response and Nrf2-mediated antioxidant defense in Di-(2-ethylhexyl) phthalate-induced renal injury in quail (Coturnix japonica). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 242:1871-1879. [PMID: 30077409 DOI: 10.1016/j.envpol.2018.07.080] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/29/2018] [Accepted: 07/19/2018] [Indexed: 06/08/2023]
Abstract
The widely used Di-(2-ethylhexyl) phthalate (DEHP) has been reported to exhibit ubiquitous environmental and global health hazards. The bioaccumulation and environmental persistence of DEHP can cause serious health hazards in wildlife animals and human. However, DEHP-induced nephrotoxicity in bird is remained unknown. Thus, this study explored the related mechanism of DEHP nephrotoxicity in quail. For this purpose, quail were exposed with DEHP at doses of 0, 250, 500, and 1000 mg/kg body weight daily by gavage administration for 45 days. The results showed that DEHP exposure induced renal injury, oxidative stress, and endoplasmic reticulum (ER) degeneration. Low level DEHP (250 mg/kg) exposure inhibited Nrf2 signaling pathway and induced renal injury via oxidative stress and suppressed the unfolded protein response (UPR) signaling pathway and induced ER stress in the kidney. But surprisingly, high level DEHP (500 mg/kg and 1000 mg/kg) exposure activated Nrf2 and UPR signaling pathways and protected kidney, but they still couldn't resist the toxicity of DEHP. Our study demonstrated that DEHP-induced nephrotoxicity in quail was associated with activating Nrf2-mediated antioxidant defense response and UPR signaling pathway.
Collapse
Affiliation(s)
- Yi Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Zheng-Hai Du
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Milton Talukder
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China; Department of Physiology and Pharmacology, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Barishal, 8210, Bangladesh
| | - Jia Lin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Xue-Nan Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Cong Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China
| | - Jin-Long Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China; Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, Northeast Agricultural University, Harbin, 150030, PR China; Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, Northeast Agricultural University, Harbin, 150030, PR China.
| |
Collapse
|
3
|
Tsai HJ, Chen BH, Wu CF, Wang SL, Huang PC, Tsai YC, Chen ML, Ho CK, Hsiung CA, Wu MT. Intake of phthalate-tainted foods and microalbuminuria in children: The 2011 Taiwan food scandal. ENVIRONMENT INTERNATIONAL 2016; 89-90:129-37. [PMID: 26827184 DOI: 10.1016/j.envint.2016.01.015] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 01/18/2016] [Accepted: 01/20/2016] [Indexed: 05/27/2023]
Abstract
BACKGROUND A major threat to public health involving phthalate-tainted foodstuffs occurred in Taiwan in 2011. Phthalates, mainly di-(2-ethylhexyl) phthalate (DEHP), were intentionally added to several categories of food commonly consumed by children. This study investigated the relationship between intake of the phthalate-tainted foods and renal function in children. METHODS Children aged ≤10years with possible phthalate exposure were enrolled in this study between August 2012 and January 2013. Questionnaires were used to collect details of exposure to phthalate-tainted foodstuffs, and blood and urine samples were collected for clinical biochemical workup. The clinical biomarkers of renal injury, including urinary microalbumin, N-acetyl-beta-d-glucosaminidase (NAG), and β2-microglobulin were measured. Exposure was categorized based on recommended tolerable daily intake level defined by the U.S. Environmental Protection Agency (0.02mg/kg/day) and the European Food Safety Authority (0.05mg/kg/day). RESULTS We analyzed intake and renal function of 184 children whose intake of DEHP-tainted foods was known. Higher DEHP exposure to DEHP-tainted foods was significantly associated with increase of urine albumin/creatinine ratio (ACR). Children in the high-exposed group (daily DEHP intake (DDI)>0.05mg/kg/day) had 10.395 times the risk of microalbuminuria than the low-exposed group (DDI≤0.02 and >0mg/kg/day) and no-exposed group combined after adjustment (95% CI=1.096-98.580, P=0.04). CONCLUSION Intake of DEHP from phthalate-tainted foods may be a potential risk factor for microalbuminuria, a marker of glomerular injury in children.
Collapse
Affiliation(s)
- Hui-Ju Tsai
- Department of Family Medicine, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Bai-Hsiun Chen
- Department of Laboratory Medicine and Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chia-Fang Wu
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan; Research Center of Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shu-Li Wang
- National Environmental Health Research Center, National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Po-Chin Huang
- National Environmental Health Research Center, National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Yi-Chun Tsai
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Mei-Lien Chen
- Institute of Environmental and Occupational Health Sciences, College of Medicine, National Yang Ming University, Taipei, Taiwan
| | - Chi-Kung Ho
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Health, Kaohsiung City Government, Kaohsiung, Taiwan
| | - Chao A Hsiung
- Division of Biostatistics and Bioinformatics, Institute of Population Health Sciences, National Health Research Institutes, Zhunan, Taiwan.
| | - Ming-Tsang Wu
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Research Center of Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Family Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Center of Environmental and Occupational Medicine, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.
| |
Collapse
|
4
|
Erkekoglu P, Giray BK, Kızilgün M, Rachidi W, Hininger-Favier I, Roussel AM, Favier A, Hincal F. Di(2-ethylhexyl)phthalate-induced renal oxidative stress in rats and protective effect of selenium. Toxicol Mech Methods 2012; 22:415-23. [DOI: 10.3109/15376516.2012.666652] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
5
|
Gupta A, Puri V, Sharma R, Puri S. Folic acid induces acute renal failure (ARF) by enhancing renal prooxidant state. ACTA ACUST UNITED AC 2010; 64:225-32. [PMID: 20833517 DOI: 10.1016/j.etp.2010.08.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2010] [Revised: 07/20/2010] [Accepted: 08/15/2010] [Indexed: 11/29/2022]
Abstract
Systemic administration of folic acid (FA) in mice was used for studying the pathogenesis associated with acute renal failure (ARF). However, the mechanism by which FA induces ARF remains poorly understood. The present study therefore, was planned to investigate the effect of folic acid administration on prooxidant state and associated ultrastructural changes in renal tissue. Balb/c male mice of 4-6 weeks old were divided into control and two folic acid treatment groups (Groups A and B). The animals in group A were administered intraperitoneal injection of folic acid (100 mg kg(-1) body weight) for a period of 7 consecutive days while the animal in group B were administered a single intraperitoneal dose of folic acid (250 mg kg(-1) body weight). The renal tissues were collected and used for the analyses of lipid peroxidative indices and activities of antioxidant enzymes in renal tissues. To corroborate biochemical findings scanning electron microscopy (SEM) in renal tissue was studied. Folic acid treated animals demonstrated marked renal hypertrophy accompanied by severe impairment of renal function. Glutathione levels (GSH) and antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) levels were significantly decreased and LPO levels increased following FA treatment. SEM results further substantiated the observed biochemical changes as evident by severe inflammation in glomeruli, swelling in primary and secondary pedicels, blebbing in villi, and tremendous deprivation of erythrocytes (RBCs) in FA treated kidneys. The present study therefore suggests that acute administration of folic acid leads to the generation of oxidative stress and altered membrane architecture responsible for folic acid induced ARF.
Collapse
Affiliation(s)
- Anuj Gupta
- Department of Biochemistry, Panjab University, Chandigarh 160 014, India
| | | | | | | |
Collapse
|
6
|
O'Brien ML, Spear BT, Glauert HP. Role of Oxidative Stress in Peroxisome Proliferator-Mediated Carcinogenesis. Crit Rev Toxicol 2008; 35:61-88. [PMID: 15742903 DOI: 10.1080/10408440590905957] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In this review, the evidence about the role of oxidative stress in the induction of hepatocellular carcinomas by peroxisome proliferators is examined. The activation of PPAR-alpha by peroxisome proliferators in rats and mice may produce oxidative stress, due to the induction of enzymes like fatty acyl coenzyme A (CoA) oxidase (AOX) and cytochrome P-450 4A1. The effect of peroxisome proliferators on the antioxidant defense system is reviewed, as is the effect on endpoints resulting from oxidative stress that may be important in carcinogenesis, such as lipid peroxidation, oxidative DNA damage, and transcription factor activation. Peroxisome proliferators clearly inhibit several enzymes in the antioxidant defense system, but studies examining effects on lipid peroxidation and oxidative DNA damage are conflicting. There is a profound species difference in the induction of hepatocellular carcinomas by peroxisome proliferators, with rats and mice being sensitive, whereas species such as nonhuman primates and guinea pigs are not susceptible to the effects of peroxisome proliferators. The possible role of oxidative stress in these species differences is also reviewed. Overall, peroxisome proliferators produce changes in oxidative stress, but whether these changes are important in the carcinogenic process is not clear at this time.
Collapse
Affiliation(s)
- Michelle L O'Brien
- Graduate Centerfor Toxicology, University of Kentucky, Lexington, Kentucky 40506-0054, USA
| | | | | |
Collapse
|
7
|
Wellejus A, Dalgaard M, Loft S. Oxidative DNA damage in male Wistar rats exposed to di-n-butyl phthalate. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2002; 65:813-824. [PMID: 12079616 DOI: 10.1080/00984100290071126] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Dialkyl phthalate esters are used in the plastic industry and widely distributed in the environment. Previously, it has been shown that di-n-butyl phthalate (DBP) produces testicular atrophy and liver enlargement in rodents, and the mechanisms behind this could involve reactive oxygen species (ROS). In this study, oxidative DNA damage was measured in terms of the premutagenic modified nucleoside 7,8-dihydro-8-oxo-2'-deoxyguanosine (8-oxodG) in nuclear DNA from liver, kidneys, and testes from rats exposed to DBP in the perinatal or preadult period. In one experiment, pregnant rats were administered 0 or 0.5 g DBP/kg/d by gavage from d 7 after conception to d 17 after delivery and organs from male offspring were analyzed. In a second experiment, 25-d-old rats were administered 0, 0.5, or 2 g DBP/kg/d by gavage for 10 d. After perinatal exposure, body and organ weights were unchanged. The 8-oxodG/10(6) dG ratio in liver DNA increased significantly in the exposed group. In contrast, the 8-oxodG/10(6) dG ratio was significantly decreased in kidney DNA, whereas it remained unchanged in the testis. After preadult exposure (postnatal d 25 to 34) the testes weight of the exposed animals were significantly decreased and severe atrophy of the seminiferous tubules was observed. The body weight of the animals in the high-dose group was significantly decreased compared to the control. The 8-oxodG levels in liver, kidney, and testis DNA remained unchanged. Although ROS has been suspected of being involved in the formation of testicular atrophy in phthalate-exposed rats, no apparent sign of oxidative DNA damage was found after phthalate exposure perinatally or during the preadult stage. With respect to phthalate-induced oxidative DNA damage in the liver, it appears that the developmental stage during exposure is important.
Collapse
Affiliation(s)
- A Wellejus
- Institute of Public Health, University of Copenhagen, Copenhagen, Denmark
| | | | | |
Collapse
|
8
|
Dobashi K, Asayama K, Nakane T, Kodera K, Hayashibe H, Nakazawa S. Induction of glutathione peroxidase in response to inactivation by nitric oxide. Free Radic Res 2001; 35:319-27. [PMID: 11697130 DOI: 10.1080/10715760100300851] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
To determine effect of nitric oxide (NO) on cellular glutathione peroxidase (GPX) level in living cells, we measured the activity, protein and mRNA of GPX in rat kidney (KNRK) cells under a high NO condition. Combined treatment of lipopolysaccharide (LPS, 1 microgram/ml) and tumor necrosis factor-alpha (TNF-alpha, 50 ng/ml) synergistically enhanced (23-folds) nitrite production from KNRK cells. This was suppressed by an inducible NO synthase (iNOS) inhibitor (aminoguanidine, N-nitro-L-arginine methylester hydrochloride) and arginase. iNOS expression was detected by RT-PCR in the treated cells. GPX was inactivated irreversibly when the cells had been homogenized before exposure to a NO donor, S-nitroso-N-acetylpenicillamine (SNAP). In living KNRK cells, SNAP and LPS + TNF-alpha exerted a transient effect on the GPX activity. The treatment with SNAP (200 microM) or sodium nitroprusside (200 microM) enhanced GPX gene expression, which was blocked by a NO scavenger, 2-phenyl-4,4,5,5,-tetramethylimidazoline-1-oxyl-3-oxide. GPX mRNA was markedly increased by the treatment with LPS + TNF-alpha, and aminoguanidine blocked the effect. In cells metabolically labeled with 75Se, LPS + TNF-alpha accelerated the incorporation of radioactivity into GPX molecule by 2.1-fold. These results suggest that inactivation of GPX by NO triggers a signal for inducing GPX gene expression in KNRK cells, thereby restoring the intracellular level of this indispensable enzyme.
Collapse
Affiliation(s)
- K Dobashi
- Department of Pediatrics, Yamanashi Medical University, Yamanashi, 409-3898 Japan.
| | | | | | | | | | | |
Collapse
|
9
|
Asayama K, Nakane T, Dobashi K, Kodera K, Hayashibe H, Uchida N, Nakazawa S. Effect of obesity and troglitazone on expression of two glutathione peroxidases: cellular and extracellular types in serum, kidney and adipose tissue. Free Radic Res 2001; 34:337-47. [PMID: 11328671 DOI: 10.1080/10715760100300291] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
To determine the effect of obesity on expression of cellular- (C-) and extracellular (EC-) glutathione peroxidase (GPX) in serum, kidney and adipose tissue, we measured GPX in serum, kidneys and adipose tissue of the obese Otsuka-Long-Evans-Tokushima Fatty (OLETF) rat and its lean counterpart (LETO). We also investigated the effect of troglitazone. Five each of OLETF and LETO rats were fed diet with or without 0.2% troglitazone for 10 days. Final body weight, kidney weight, blood glucose and serum tumor necrosis factor-alpha (TNF-alpha) level were higher in OLETF rats than in LETO rats. Serum and kidney GPX activities were higher, but adipose tissue GPX activity was lower, in OLETF rats than in LETO rats. Troglitazone treatment decreased adipose tissue GPX activity and abolished overproduction of TNF-alpha in OLETF rats. Immunoblot analysis, for the first time, revealed that both obesity and troglitazone suppressed the protein signals for C-GPX and EC-GPX in adipose tissue. Serum protein carbonyl groups were increased in OLETF rats and troglitazone completely blocked this increase. Increased serum GPX activity in obese rat was due to the increased secretion of EC-GPX from the kidney. Troglitazone protected against the enhanced oxidative stress induced by obesity independently of the serum GPX concentration.
Collapse
Affiliation(s)
- K Asayama
- Department of Pediatrics, Yamanashi Medical University, 1110 Shimokato, Tamahocho, Nakakomagun, Yamanashi 409-3898, Japan.
| | | | | | | | | | | | | |
Collapse
|
10
|
Lespine A, Fernandez Y, Periquet B, Galinier A, Garcia J, Anglade F, Ghisolfi J, Thouvenot JP. Total parenteral nutrition decreases liver oxidative metabolism and antioxidant defenses in healthy rats: comparative effect of dietary olive and soybean oil. JPEN J Parenter Enteral Nutr 2001; 25:52-9. [PMID: 11284470 DOI: 10.1177/014860710102500252] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Total parenteral nutrition (TPN) is used for critically ill patients undergoing surgery, after trauma, or during disease conditions that favor oxidative stress. We studied the effect of TPN on liver oxidative metabolism and antioxidant defenses in rats, and we compared the effect of soybean oil- and olive oil-based diets. METHODS Seven-week-old rats (n = 28) were divided into four groups. Two experimental groups received a TPN solution containing soybean oil (TPN-S) or a mixture of olive/soybean oil, 80/20 (TPN-O), IV for 6 days. Orally fed animals received a solid diet including soybean oil (Oral-S) or olive/soybean oil, 80/20 (Oral-O). The following parameters were measured: DL-alpha-tocopherol, vitamin A, malondialdehyde and thiobarbituric acid reactive substances (MDA-TBARS), and total radical-trapping antioxidant parameter (TRAP) in serum; DL-alpha-tocopherol, vitamin A, glutathione (GSH), and catalase (Cat) activity in liver homogenate; fatty acids from phospholipid, cytochrome P-450 content, NADPH-cytochrome c2 reductase activity in liver microsomes; superoxide dismutase (SOD), glutathione peroxidase (Gpx), glutathione reductase (GR), glutathione transferase (GST), and glucose-6-phosphate dehydrogenase (G6PD) in liver cytosol. RESULTS The soybean or olive oil diets modified the liver microsomal fatty acid phospholipid composition, but the unsaturation index remained unchanged. TPN specifically increased the saturation of the membrane. The cytochrome P-450 level and the NADPH-cytochrome c2 reductase, SOD, Gpx, Cat, and GST activities were unchanged by soybean oil or olive oil diet but decreased receiving TPN. CONCLUSIONS In rats, TPN decreased the liver oxidative metabolism and enzymatic antioxidant defenses. This may be related to saturation of the liver microsomal fatty acids.
Collapse
Affiliation(s)
- A Lespine
- Laboratoire de Biochimie Generale et Nutritionnelle, CHU Purpan, Toulouse.
| | | | | | | | | | | | | | | |
Collapse
|