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Yang C, Yu Y, An J. Effect of High-Sucrose Diet on the Occurrence and Progression of Diabetic Retinopathy and Dietary Modification Strategies. Nutrients 2024; 16:1393. [PMID: 38732638 PMCID: PMC11085904 DOI: 10.3390/nu16091393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 04/29/2024] [Accepted: 05/02/2024] [Indexed: 05/13/2024] Open
Abstract
As the most serious of the many worse new pathological changes caused by diabetes, there are many risk factors for the occurrence and development of diabetic retinopathy (DR). They mainly include hyperglycemia, hypertension, hyperlipidemia and so on. Among them, hyperglycemia is the most critical cause, and plays a vital role in the pathological changes of DR. High-sucrose diets (HSDs) lead to elevated blood glucose levels in vivo, which, through oxidative stress, inflammation, the production of advanced glycation end products (AGEs) and vascular endothelial growth factor (VEGF), cause plenty of pathological damages to the retina and ultimately bring about loss of vision. The existing therapies for DR primarily target the terminal stage of the disease, when irreversible visual impairment has appeared. Therefore, early prevention is particularly critical. The early prevention of DR-related vision loss requires adjustments to dietary habits, mainly by reducing sugar intake. This article primarily discusses the risk factors, pathophysiological processes and molecular mechanisms associated with the development of DR caused by HSDs. It aims to raise awareness of the crucial role of diet in the occurrence and progression of DR, promote timely changes in dietary habits, prevent vision loss and improve the quality of life. The aim is to make people aware of the importance of diet in the occurrence and progression of DR. According to the dietary modification strategies that we give, patients can change their poor eating habits in a timely manner to avoid theoretically avoidable retinopathy and obtain an excellent prognosis.
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Affiliation(s)
- Chen Yang
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou 325027, China;
- Oujiang Laboratory, Zhejiang Lab for Regenerative Medicine, Vision and Brain Health, Wenzhou 325101, China
| | - Yifei Yu
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing 100193, China
| | - Jianhong An
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou 325027, China;
- Oujiang Laboratory, Zhejiang Lab for Regenerative Medicine, Vision and Brain Health, Wenzhou 325101, China
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Kern TS, Antonetti DA, Smith LEH. Pathophysiology of Diabetic Retinopathy: Contribution and Limitations of Laboratory Research. Ophthalmic Res 2019; 62:196-202. [PMID: 31362288 PMCID: PMC6872907 DOI: 10.1159/000500026] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 03/29/2019] [Indexed: 12/11/2022]
Abstract
Preclinical models of diabetic retinopathy are indispensable in the drug discovery and development of new therapies. They are, however, imperfect facsimiles of diabetic retinopathy in humans. This chapter discusses the advantages, limitations, and physiological and pathological relevance of preclinical models of diabetic retinopathy. The judicious interpretation and extrapolation of data derived from these models to humans and a correspondingly greater emphasis placed on translational medical research in early-stage clinical trials are essential to more successfully inhibit the development and progression of diabetic retinopathy in the future.
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Affiliation(s)
- Timothy S Kern
- Gavin Herbert Eye Institute, University of California Irvine, Irvine, California, USA,
- Veterans Administration Medical Center Research Service 151, Cleveland, Ohio, USA,
| | - David A Antonetti
- Kellogg Eye Center, Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan, USA
| | - Lois E H Smith
- Department of Ophthalmology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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DiNicolantonio JJ, Bhutani J, O'Keefe JH. Added sugars drive chronic kidney disease and its consequences: A comprehensive review. JOURNAL OF INSULIN RESISTANCE 2016. [DOI: 10.4102/jir.v1i1.3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The consumption of added sugars (e.g. sucrose [table sugar] and high-fructose corn syrup) over the last 200 years has increased exponentially and parallels the increased prevalence of chronic kidney disease (CKD). Data for animals and humans suggest that the consumption of added sugars leads to kidney damage and related metabolic derangements that increase cardiovascular risk. Importantly, the consumption of added sugars has been found to induce insulin resistance and increase uric acid in humans, both of which increase the conversion of glucose to fructose (i.e. fructogenesis) via the polyol pathway. The polyol pathway has recently been implicated in the contribution and progression of kidney damage, suggesting that even glucose can be toxic to the kidney via its endogenous transformation into fructose in the proximal tubule. Consuming added fructose has been shown to induce insulin resistance, which can lead to hyperglycaemia, oxidative stress, inflammation and the activation of the immune system, all of which can synergistically contribute to kidney damage. CKD guidelines should stress a reduction in the consumption of added sugars as a means to prevent and treat CKD as well as reduce CKD–related morbidity and mortality.
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DiNicolantonio JJ, O'Keefe JH, Lucan SC. Added fructose: a principal driver of type 2 diabetes mellitus and its consequences. Mayo Clin Proc 2015; 90:372-81. [PMID: 25639270 DOI: 10.1016/j.mayocp.2014.12.019] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 12/19/2014] [Accepted: 12/22/2014] [Indexed: 01/08/2023]
Abstract
Data from animal experiments and human studies implicate added sugars (eg, sucrose and high-fructose corn syrup) in the development of diabetes mellitus and related metabolic derangements that raise cardiovascular (CV) risk. Added fructose in particular (eg, as a constituent of added sucrose or as the main component of high-fructose sweeteners) may pose the greatest problem for incident diabetes, diabetes-related metabolic abnormalities, and CV risk. Conversely, whole foods that contain fructose (eg, fruits and vegetables) pose no problem for health and are likely protective against diabetes and adverse CV outcomes. Several dietary guidelines appropriately recommend consuming whole foods over foods with added sugars, but some (eg, recommendations from the American Diabetes Association) do not recommend restricting fructose-containing added sugars to any specific level. Other guidelines (such as from the Institute of Medicine) allow up to 25% of calories as fructose-containing added sugars. Intake of added fructose at such high levels would undoubtedly worsen rates of diabetes and its complications. There is no need for added fructose or any added sugars in the diet; reducing intake to 5% of total calories (the level now suggested by the World Health Organization) has been shown to improve glucose tolerance in humans and decrease the prevalence of diabetes and the metabolic derangements that often precede and accompany it. Reducing the intake of added sugars could translate to reduced diabetes-related morbidity and premature mortality for populations.
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Affiliation(s)
- James J DiNicolantonio
- Department of Preventive Cardiology at Saint Luke's Mid America Heart Institute, Kansas City, MO.
| | - James H O'Keefe
- Department of Preventive Cardiology at Saint Luke's Mid America Heart Institute, Kansas City, MO
| | - Sean C Lucan
- Department of Family and Social Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY
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Price KD, Price CS, Reynolds RD. Hyperglycemia-induced latent scurvy and atherosclerosis: the scorbutic-metaplasia hypothesis. Med Hypotheses 1996; 46:119-29. [PMID: 8692035 DOI: 10.1016/s0306-9877(96)90011-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Latent scurvy is characterized by a reversible atherosclerosis that closely resembles the clinical form of this disease. Acute scurvy is characterized by microvascular complications such as widespread capillary hemorrhaging. Vitamin C (ascorbate) is required for the synthesis of collagen, the protein most critical in the maintenance of vascular integrity. We suggest that in latent scurvy, large blood vessels use modified LDL--in particular lipoprotein(a)--in addition to collagen to maintain macrovascular integrity. By this mechanism, collagen is spared for the maintenance of capillaries, the sites of gas and nutrient exchange. The foam-cell phenotype of atherosclerosis is identified as a mesenchymal genetic program, regulated by the availability of ascorbate. When vitamin C is limited, foam cells develop and induce oxidative modification of LDL, thereby stabilizing large blood vessels via the deposition of LDL. The structural similarity between vitamin C and glucose suggests that hyperglycemia will inhibit cellular uptake of ascorbate, inducing local vitamin C deficiency.
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Affiliation(s)
- K D Price
- University of Illinois at Chicago, College of Medicine 60612, USA
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6
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Robinson W, Laver NM, Lou MF. The role of aldose reductase in diabetic retinopathy: Prevention and intervention studies. Prog Retin Eye Res 1995. [DOI: 10.1016/1350-9462(94)00020-g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Al-Khamees HA, Kandil HA, El-Tahir KEH, Bayomi SM. Synthesis and pharmacological activity of 3-[(p-acetamidoalkyl) benzenesulfonyl]-thiazolidin-4-ones and thiazolines. Arch Pharm Res 1993. [DOI: 10.1007/bf02974480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
Aldose reductase inhibitors impede flux of glucose through the sorbitol pathway in diabetes mellitus. They therefore reduce the accumulation of the pathway metabolites, sorbitol and fructose, reduce the impact of the flux on the cofactors used by the pathway and reduce other derived phenomena, such as osmotic stress and myo-inositol depletion. As drugs, their targets are the chronic complications of diabetes--neuropathy, retinopathy, nephropathy and vasculopathy. In experimental models there is proof of activity against biochemical, functional and structural defects in all of the involved tissues, but we await full clinical verification of this potential.
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Affiliation(s)
- D R Tomlinson
- Department of Pharmacology, Queen Mary and Westfield College, London, U.K
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Robison WG, McCaleb ML, Feld LG, Michaelis OE, Laver N, Mercandetti M, Robinson WG. Degenerated intramural pericytes ('ghost cells') in the retinal capillaries of diabetic rats. Curr Eye Res 1991; 10:339-50. [PMID: 1829996 DOI: 10.3109/02713689108996340] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
One of the earliest histopathological signs of diabetic retinopathy is a selective loss of intramural pericytes from retinal capillaries. In the present study, the retinal vessels of rats with streptozotocin-induced diabetes (STZ Wistar) and rats with genetically-induced insulin dependent diabetes mellitus (BB Wistar) and non-insulin dependent diabetes mellitus (SHR/N-corpulent) were examined after 6 to 8 months duration for diabetes-related retinal microangiopathies. The SHR/N-corpulent (cp) rats were fed a 54% sucrose diet, whereas the STZ Wistar and BB Wistar rats were fed laboratory chow for 32 to 36 weeks. In all the diabetic rats, the retinal capillaries in enzyme-digested flat mounts exhibited an increase in periodic-acid-Schiff (PAS) staining and loss of pericytes compared to their respective euglycemic controls. Pericyte "ghosts", like those defined in human diabetes as intramural pockets lacking normal cell contents, were documented by high resolution micrographs in all the diabetic rats. Endothelial cell proliferation, capillary dilation, and varicose loop formation were noted in some of the diabetic rats. Hence, similar capillary lesions were found in very different groups of diabetic rats. The findings suggest that a chronic high tissue concentration of glucose is the underlying factor which triggers pathogenesis in the pericyte. Hyperglycemia-induced activation of endogenous aldose reductase of the polyol pathway is probably the initial insult, but other factors such as advanced glycosylation products may affect the final outcome.
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Tsubota K, Krauss JM, Kenyon KR, Laing RA, Miglior S, Cheng HM. Lens redox fluorometry: pyridine nucleotide fluorescence and analysis of diabetic lens. Exp Eye Res 1989; 49:321-34. [PMID: 2792231 DOI: 10.1016/0014-4835(89)90043-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We performed both ex vivo and in vivo fluorometric analyses of pyridine nucleotides (PN) in rabbit and rat lenses. Rabbit lens PN fluorescence (99% NADH) was found to have an excitation maximum at 366 nm and an emission maximum at 462 nm (366:462). The only other fluorescent chromophore in that region of the spectrum has excitation and emission peaks at 328 and 460 nm, respectively. Anaerobic glycolysis in the lens was stimulated by KCN, a known inhibitor of mitochondrial respiration, after which a time-study of fluorescence intensities was performed. Over the course of a 3.5 hr period following treatment with KCN, the PN signal showed a statistically significant increase relative to that in the control lenses (those treated with KCl). while the 328:460 signal (which may be due to some protein involved in energy transfer with the PN) had a significantly greater decrease. We also found that fluorescence intensity of NADH in solution is linearly proportional to physiologic-range concentration. Moreover, there was a close correlation between fluorescence intensity of rat lens PN as measured on a specular microscope-coupled redox fluorometer capable of in vivo use, and the lens PN levels as determined by the analytical cycling assay technique. This fluorometer was then employed to assess the redox state in rats with streptozotocin-induced diabetes. The normalized ratio of PN to flavoproteins (Fp) in the lens epithelium increased from 0.96 +/- 0.12 in the normal state to 1.48 +/- 0.30 2 weeks after diabetes induction. In contrast, the ratio in the diabetic lens treated with an aldose reductase inhibitor, sorbinil, did not increase. The increase in the PN:Fp ratio therefore reflects activation of the polyol pathway and its associated metabolic activities, which results in an increase in the NADH:NAD ratio in the diabetic rat lenses. Our results indicate that the non-invasive, real-time method of redox fluorometry may be useful in the early detection and evaluation of cataracts and other disorders in lens metabolism, long before opacities occur. It can be used to monitor the disease process and evaluate the efficacy of such drugs as aldose reductase inhibitors on a biochemical level.
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Affiliation(s)
- K Tsubota
- Department of Ophthalmology, Boston University School of Medicine, MA 02118
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11
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Fields M, Lewis CG, Beal T. Accumulation of sorbitol in copper deficiency: dependency on gender and type of dietary carbohydrate. Metabolism 1989; 38:371-5. [PMID: 2498610 DOI: 10.1016/0026-0495(89)90127-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The present study was designed to examine tissue sorbitol levels in copper-deficient rats consuming dietary fructose as the only source of carbohydrate and to determine if any changes in tissue sorbitol levels are influenced by the sex of the rat. Tissue levels of glucose, sorbitol, fructose, and glyceraldehyde were measured along with the activities of aldose reductase and sorbitol dehydrogenase of male and female rats consuming copper-deficient or adequate diets containing either fructose or starch for 3 weeks. Regardless of copper status, sorbitol accumulated in the livers of males consuming fructose compared to females and to males eating starch. The greatest sorbitol accumulation in the kidney occurred in the copper-deficient male rat consuming the fructose diet. These results strongly suggest that the pathology and complications of copper deficiency in the male rat fed fructose may be due to the increased sorbitol contents of tissues.
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Affiliation(s)
- M Fields
- Department of Medicine, Georgetown University Medical Center, Washington, DC
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12
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Abstract
Intestinal D-fructose absorption in 31 children was investigated using measurements of breath hydrogen. Twenty five children had no abdominal symptoms and six had functional bowel disorders. After ingestion of fructose (2 g/kg bodyweight), 22 children (71%) showed a breath hydrogen increase of more than 10 ppm over basal values, indicating incomplete absorption: the increase averaged 53 ppm, range 12 to 250 ppm. Four of these children experienced abdominal symptoms. Three of the six children with bowel disorders showed incomplete absorption. Seven children were tested again with an equal amount of glucose, and in three of them also of galactose, added to the fructose. The mean maximum breath hydrogen increases were 5 and 10 ppm, respectively, compared with 103 ppm after fructose alone. In one boy several tests were performed with various sugars; fructose was the only sugar incompletely absorbed, and the effect of glucose on fructose absorption was shown to be dependent on the amount added. It is concluded that children have a limited absorptive capacity for fructose. We speculate that the enhancing effect of glucose and galactose on fructose absorption may be due to activation of the fructose carrier. Apple juice in particular contains fructose in excess of glucose and could lead to abdominal symptoms in susceptible children.
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Poulsom R, Boot-Handford RP, Heath H. The effects of long-term treatment of streptozotocin-diabetic rats with an aldose reductase inhibitor. Exp Eye Res 1983; 37:507-15. [PMID: 6423399 DOI: 10.1016/0014-4835(83)90027-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
To test the possible involvement of the sorbitol pathway in the pathogenesis of retinopathy in long-term experimentally-diabetic rats, streptozotocin-diabetic and normal rats were dosed orally (50 mg/kg body weight daily) for up to 373 days with an aldose reductase inhibitor (ICI 105552) or a placebo. Long-term treatment with ICI 105552 (1,(3,4-dichlorobenzyl)-3-methyl-1,2-dihydro-2-oxoquinol-4-ylaceti c acid; sodium salt) markedly reduced the normal accumulations of sorbitol and fructose in the sciatic nerves (86 and 69% reductions) and seminal vesicles with coagulating glands (75 and 49% reductions). Thus, by these criteria, the inhibitor was as effective after several months of dosing as after three weeks. There was no evidence that treatment with this aldose reductase inhibitor had any protective effect against the development of pathological changes in the retina and kidney of these rats.
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Poulsom R, Mirrlees DJ, Earl DC, Heath H. The effects of an aldose reductase inhibitor upon the sorbitol pathway, fructose-1-phosphate and lactate in the retina and nerve of streptozotocin-diabetic rats. Exp Eye Res 1983; 36:751-60. [PMID: 6406254 DOI: 10.1016/0014-4835(83)90112-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
UNLABELLED To investigate the aetiology of complications secondary to experimental diabetes in the rat, the concentrations of glucose, sorbitol, fructose, fructose-1-phosphate, lactate and inositol were measured in the retina and sciatic nerve of streptozotocin-diabetic and normal rats treated for 22 days with ICI 105552 (1-(3,4-dichlorobenzyl)-3-methyl-1,2-dihydro-2-oxoquinol-4-ylacetic acid, sodium salt; 50 mg/kg body wt daily), an inhibitor of aldose reductase (E.C. 1.1.1.21) the first enzyme of the sorbitol pathway. In the diabetic nerve, where accumulation of sorbitol may be pathogenic, treatment with ICI 105552 reduced the accumulations of sorbitol (70%), fructose (47%) and lactate (34%) without affecting glucose, fructose-1-phosphate or inositol. In the nerves of controls, the inhibitor reduced both sorbitol (23%) and fructose (20%) levels without other effects. In the diabetic retina where accumulation of sorbitol or lactate might be pathogenic, treatment with ICI 105552 had no statistically significant effect upon the concentrations of glucose, sorbitol, fructose, fructose-1-phosphate or inositol. However, the inhibitor reduced the concentration of lactate to below the non-diabetic level. In the retinas of controls, dosage with ICI 105552 reduced the concentration of sorbitol by 36% without other effects. THE RESULTS (1) demonstrated that ICI 105552 was a potent inhibitor of aldose reductase in sciatic nerve and suggested that a proportion of nerve lactate in diabetes could result from sorbitol pathway activity; (2) implied that flux through the sorbitol pathway, eventually to form lactate, increases in diabetic retina; and (3) indicated, by the drug's reduction of retinal lactate concentration, that inhibitors of aldose reductase might be of potential use in diabetic retinopathy.
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Poulsom R, Heath H. Inhibition of aldose reductase in five tissues of the streptozotocin-diabetic rat. Biochem Pharmacol 1983; 32:1495-9. [PMID: 6407486 DOI: 10.1016/0006-2952(83)90471-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
For 22 days, streptozotocin-diabetic and normal rats were intubated once daily with ICI 105552 (1-(3,4-dichlorobenzyl)-3-methyl-1,2-dihydro-2-oxoquinol-4-ylacetic acid, sodium salt: 50 mg/kg body weight) an inhibitor of aldose reductase (EC 1.1.1.21), the first enzyme of the sorbitol pathway. Treatment with ICI 105552 affected neither glycaemia nor tissue glucose nor inositol concentrations yet reduced significantly the abnormal accumulations in diabetes of sorbitol in the lens (70% reduction), sciatic nerve (86%) and seminal vesicles with coagulating glands (S.V.C.G., 55%). ICI 105552 had no effect upon sorbitol accumulated in the diabetic kidney but it reduced the level in controls by 43%. The compound reduced the accumulation of sorbitol in diabetic retina by 58% although variation was too great for the decrease to be significant statistically. Treatment with ICI 105552 produced small (less than or equal to 11%) yet statistically significant increases in the weights of the kidneys, and both liver and kidney weight/100 g residual body weight but did not affect the weights of the body, lens, retina or S.V.C.G. The importance of these findings for the development of potentially chemotherapeutic aldose reductase inhibitors is discussed.
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Retinopathic effect of sucrose-rich diets due to fructose. Nutr Rev 1982; 40:117-18, 128. [PMID: 7048148 DOI: 10.1111/j.1753-4887.1982.tb05285.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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Boot-Handford R, Heath H. The effects of aldose reductase inhibitors on the metabolism of cultured monkey kidney epithelial cells. Biochem Pharmacol 1981; 30:3065-9. [PMID: 6802136 DOI: 10.1016/0006-2952(81)90494-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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