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Effect of astaxanthin and melatonin on cell viability and DNA damage in human breast cancer cell lines. Acta Histochem 2022; 124:151832. [PMID: 34952259 DOI: 10.1016/j.acthis.2021.151832] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 12/05/2021] [Accepted: 12/08/2021] [Indexed: 01/04/2023]
Abstract
BACKGROUND Astaxanthin is a xanthophyll pigment found in algae and marine animals, having strong anti-oxidative, anti-tumoral, and anti-inflammatory effects. Additionally, melatonin has shown inhibitory effects on the growth of human breast cancer cells. The aim of the present study was to evaluate the effect of astaxanthin and the combined effects of astaxanthin and melatonin on breast cancer cells and the non-tumoral breast cell line. MATERIALS AND METHODS The human breast cancer cell lines, T47D and MDA-MB-231, and non-tumorigenic cell line MCF 10A were treated and compared to astaxanthin, melatonin, and co-administration of these two compounds. Cell viability, apoptosis induction, Bcl-2 protein expression, and DNA damage were measured by MTT assay, acridine orange/ethidium bromide (AO/EB) staining, immunocytochemistry, and comet assay. RESULTS Astaxanthin at lower doses than melatonin reduced cell viability and Bcl2 expression, induced apoptosis and DNA damage in MDA-MB-231 and T47D. Meanwhile, the effects of astaxanthin on cell cytotoxicity, apoptosis, and DNA damage in MCF10A cells are insignificant compared to MDA-MB-231 and T47D. Moreover, the results indicated that astaxanthin in T47D cells caused more cell death compared to MDA-MB-231 cells. Astaxanthin induced cell death on breast cancer cells and without cell cytotoxicity for non-cancerous cells. CONCLUSION Furthermore, the presence of astaxanthin increased the function of melatonin-induced cell death in breast cancer cells.
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Serra J, Marschoff E, Domínguez R. Oxidative stress in neurological disease: Is it the cause, consequence, or trigger of a chronic progressive form? NEUROLOGÍA (ENGLISH EDITION) 2016. [DOI: 10.1016/j.nrleng.2016.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Serra J, Marschoff E, Domínguez R. Estrés oxidativo en la enfermedad neurológica. ¿Es causa, consecuencia o induce una forma crónica progresiva? Neurologia 2016; 31:420-1. [DOI: 10.1016/j.nrl.2014.10.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 10/31/2014] [Indexed: 11/26/2022] Open
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Domínguez R, Pagano M, Marschoff E, González S, Repetto M, Serra J. Alzheimer disease and cognitive impairment associated with diabetes mellitus type 2: associations and a hypothesis. NEUROLOGÍA (ENGLISH EDITION) 2014. [DOI: 10.1016/j.nrleng.2014.10.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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Elevated risk of type 2 diabetes for development of Alzheimer disease: a key role for oxidative stress in brain. Biochim Biophys Acta Mol Basis Dis 2014; 1842:1693-706. [PMID: 24949886 DOI: 10.1016/j.bbadis.2014.06.010] [Citation(s) in RCA: 286] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 06/05/2014] [Accepted: 06/09/2014] [Indexed: 12/23/2022]
Abstract
Alzheimer disease (AD) is the most common form of dementia among the elderly and is characterized by progressive loss of memory and cognition. Epidemiological data show that the incidence of AD increases with age and doubles every 5 years after 65 years of age. From a neuropathological point of view, amyloid-β-peptide (Aβ) leads to senile plaques, which, together with hyperphosphorylated tau-based neurofibrillary tangles and synapse loss, are the principal pathological hallmarks of AD. Aβ is associated with the formation of reactive oxygen (ROS) and nitrogen (RNS) species, and induces calcium-dependent excitotoxicity, impairment of cellular respiration, and alteration of synaptic functions associated with learning and memory. Oxidative stress was found to be associated with type 2 diabetes mellitus (T2DM), which (i) represents another prevalent disease associated with obesity and often aging, and (ii) is considered to be a risk factor for AD development. T2DM is characterized by high blood glucose levels resulting from increased hepatic glucose production, impaired insulin production and peripheral insulin resistance, which close resemble to the brain insulin resistance observed in AD patients. Furthermore, growing evidence suggests that oxidative stress plays a pivotal role in the development of insulin resistance and vice versa. This review article provides molecular aspects and the pharmacological approaches from both preclinical and clinical data interpreted from the point of view of oxidative stress with the aim of highlighting progresses in this field.
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Schrag M, Mueller C, Zabel M, Crofton A, Kirsch W, Ghribi O, Squitti R, Perry G. Oxidative stress in blood in Alzheimer's disease and mild cognitive impairment: A meta-analysis. Neurobiol Dis 2013; 59:100-10. [DOI: 10.1016/j.nbd.2013.07.005] [Citation(s) in RCA: 211] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 06/02/2013] [Accepted: 07/04/2013] [Indexed: 12/26/2022] Open
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Domínguez RO, Pagano MA, Marschoff ER, González SE, Repetto MG, Serra JA. Alzheimer disease and cognitive impairment associated with diabetes mellitus type 2: associations and a hypothesis. Neurologia 2013; 29:567-72. [PMID: 24140159 DOI: 10.1016/j.nrl.2013.05.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 05/05/2013] [Indexed: 01/21/2023] Open
Abstract
INTRODUCTION Epidemiological studies have demonstrated that patients with diabetes mellitus have an increased risk of developing Alzheimer disease, but the relationship between the 2 entities is not clear. DEVELOPMENT Both diseases exhibit similar metabolic abnormalities: disordered glucose metabolism, abnormal insulin receptor signalling and insulin resistance, oxidative stress, and structural abnormalities in proteins and β-amyloid deposits. Different hypotheses have emerged from experimental work in the last two decades. One of the most comprehensive relates the microvascular damage in diabetic polyneuritis with the central nervous system changes occurring in Alzheimer disease. Another hypothesis considers that cognitive impairment in both diabetes and Alzheimer disease is linked to a state of systemic oxidative stress. Recently, attenuation of cognitive impairment and normalisation of values in biochemical markers for oxidative stress were found in patients with Alzheimer disease and concomitant diabetes. Antidiabetic drugs may have a beneficial effect on glycolysis and its end products, and on other metabolic alterations. CONCLUSIONS Diabetic patients are at increased risk for developing Alzheimer disease, but paradoxically, their biochemical alterations and cognitive impairment are less pronounced than in groups of dementia patients without diabetes. A deeper understanding of interactions between the pathogenic processes of both entities may lead to new therapeutic strategies that would slow or halt the progression of impairment.
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Affiliation(s)
- R O Domínguez
- Departamento de Neurología, Hospital Sirio Libanés, Facultad de Medicina, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.
| | - M A Pagano
- Departamento de Neurología, Hospital Juan A. Fernández, Facultad de Medicina, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - E R Marschoff
- Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - S E González
- Departamento de Neurología, Hospital Sirio Libanés, Facultad de Medicina, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - M G Repetto
- Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - J A Serra
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Bioquímica y Medicina Molecular (IBIMOL, UBA-CONICET), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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Domínguez RO, Marschoff ER, González SE, Repetto MG, Serra JA. Type 2 diabetes and/or its treatment leads to less cognitive impairment in Alzheimer's disease patients. Diabetes Res Clin Pract 2012; 98:68-74. [PMID: 22658669 DOI: 10.1016/j.diabres.2012.05.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 05/08/2012] [Accepted: 05/10/2012] [Indexed: 12/21/2022]
Abstract
AIM To evaluate the cognitive performance of a homogeneous population of Alzheimer's disease (AD), non-demented Type 2 Diabetes Mellitus (DIAB), demented with concomitant diseases (AD+DIAB) and healthy control subjects. AD is a progressive dementia disorder characterized clinically by impairment of memory, cognition and behavior. Recently, a major research interest in AD has been placed on early evaluation. Diabetes is one of the clinical conditions that represent the greatest risk of developing oxidative stress and dementia. Glucose overload, leading to the development of impaired-induced insulin secretion in DIAB and has been suggested to slow or deter AD pathogenesis. METHODS The degree of cognitive impairment was determined on the Alzheimer Disease Assessment Scale-Cognitive (ADAS-Cog) and the Folstein's Mini Mental State Examination (MMSE); the severity of dementia was quantified applying the Clinical Dementia Rating (CDR) test; the Hamilton test was employed to evaluate depressive conditions; the final population studied was 101 subjects. RESULTS The cognitive deterioration is statistically significantly lower (p<0.05) in AD+DIAB patients as compared with AD patients. CONCLUSIONS In this longitudinal study the superimposed diabetic condition was associated with a lower rate of cognitive decline, while diabetic non-demented patients and controls present normal scores.
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Affiliation(s)
- Raúl O Domínguez
- Sirio-Libanés Hospital, Department of Neurology, School of Medicine, University of Buenos Aires (UBA), Buenos Aires, Argentina
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Mueller C, Schrag M, Crofton A, Stolte J, Muckenthaler MU, Magaki S, Kirsch W. Altered serum iron and copper homeostasis predicts cognitive decline in mild cognitive impairment. J Alzheimers Dis 2012; 29:341-50. [PMID: 22232013 PMCID: PMC3596019 DOI: 10.3233/jad-2011-111841] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Alzheimer's disease (AD) brain is marked by severe neuronal death which has been partly attributed to increased oxidative stress. The pathophysiology accounting for this free radical injury is not well-delineated at this point, but one hypothesis is that a derangement in transition metal metabolism contributes to the process. We tested the hypothesis that peripheral derangement of transition metal metabolism is present early in the dementing process. We analyzed non-heme iron and copper levels in serum from subjects with normal cognition, mild cognitive impairment, and early stage senile dementia and followed these subjects over 5 years. An increase in the ratio of serum copper to non-heme iron levels predicted which subjects with mild cognitive impairment would progress to dementia versus those that would remain cognitively stable. This increase did not correlate with changes in expression of iron regulatory protein 2 or selected downstream targets in peripheral lymphocytes. A cDNA-based microarray (IronChip) containing genes relevant to iron and copper metabolism was used to assess transition metal metabolism in circulating lymphocytes from cognitively normal and demented subjects. No gene was identified as being dysregulated more than 2-fold, and verification using quantitative RT-PCR demonstrated no significant changes in expression for ALAS2, FOS, and CTR1. The increased ratio of serum copper to serum iron prior to dementia has potential as a biomarker for cognitive decline and mirrors other changes in serum previously reported by others, but iron and copper metabolism pathways appear to be broadly unaffected in peripheral blood in AD.
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Affiliation(s)
- Claudius Mueller
- Neurosurgery Center for Research, Loma Linda University, Loma Linda, CA, USA
- Center for Applied Proteomics and Molecular Medicine, George Mason University, Manassas, VA, USA
| | - Matthew Schrag
- Neurosurgery Center for Research, Loma Linda University, Loma Linda, CA, USA
- Department of Neurology, Yale University, New Haven, CT, USA
| | - Andrew Crofton
- Neurosurgery Center for Research, Loma Linda University, Loma Linda, CA, USA
- Department of Human Anatomy and Pathology, Loma Linda University, Loma Linda, CA, USA
| | - Jens Stolte
- Molecular Medicine, University of Heidelberg, Heidelberg, Germany
| | | | - Shino Magaki
- Neurosurgery Center for Research, Loma Linda University, Loma Linda, CA, USA
- Department of Pathology, University of California, Los Angeles, CA, USA
| | - Wolff Kirsch
- Neurosurgery Center for Research, Loma Linda University, Loma Linda, CA, USA
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Peripheral markers in neurodegenerative patients and their first-degree relatives. J Neurol Sci 2011; 314:48-56. [PMID: 22113180 DOI: 10.1016/j.jns.2011.11.001] [Citation(s) in RCA: 250] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Revised: 09/27/2011] [Accepted: 11/02/2011] [Indexed: 11/21/2022]
Abstract
We have determined various biomarkers in the peripheral blood of Alzheimer, Parkinson and vascular dementia patients by comparing the samples with those of first-degree relatives and control subjects. Our results, together with correlation studies using data from the Mini-Mental State Examination (MMSE), suggest that the clinical evaluation of the nitrite (NOx) concentration in Alzheimer patients should be complemented by assays of protein carbonyls (PCs) levels, the ratio of reduced to oxidized glutathione (GSH/GSSG) in plasma, PCs in erythrocytes and PCs and calcium content in leukocytes. For Parkinson patients it would be useful to determine NOx, thiobarbituric-acid reactive substances (TBARS) and PCs in erythrocytes, and NOx and TBARS en leukocytes. For vascular-demented (VD) patients, determination of NOx, Cu, and GSH/GSSG in plasma and TBARS, and PCs in erythrocytes together with PCs in leukocytes should be assayed. Relatives of Alzheimer patients showed alterations in plasma Se and Zn concentrations, catalase (CAT) activity in erythrocytes and calcium content in leukocytes as possible predictive markers of the disease. Relatives of Parkinson patients showed elevated levels of NOx in leukocytes. In the case of vascular-demented patients we suggest NOx, GSH/GSSG and α-tocopherol in plasma, the CAT/superoxide dismutase ratio in erythrocytes and TBARS, GSSG and glutathione reductase in leukocytes as predictive markers. Large-scale longitudinal population-based studies using these suggested biomarkers are necessary in order to assess their level of reliability and specificity in clinical practice.
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Arnal N, Cristalli DO, de Alaniz MJ, Marra CA. Clinical utility of copper, ceruloplasmin, and metallothionein plasma determinations in human neurodegenerative patients and their first-degree relatives. Brain Res 2010; 1319:118-30. [DOI: 10.1016/j.brainres.2009.11.085] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Revised: 11/04/2009] [Accepted: 11/08/2009] [Indexed: 01/11/2023]
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Serra JA, Domínguez RO, Marschoff ER, Guareschi EM, Famulari AL, Boveris A. Systemic Oxidative Stress Associated with the Neurological Diseases of Aging. Neurochem Res 2009; 34:2122-32. [DOI: 10.1007/s11064-009-9997-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2009] [Indexed: 11/30/2022]
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Liu CF, Yu LF, Lin CH, Lin SC. Effect of Auricular Pellet Acupressure on Antioxidative Systems in High-Risk Diabetes Mellitus. J Altern Complement Med 2008; 14:303-7. [DOI: 10.1089/acm.2006.6064] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Chi-Feng Liu
- National Taipei College of Nursing, Taipei, 112, Taiwan, R.O.C
| | - Lee-Fen Yu
- Department of Nursing, Taipei Medical University, Wan-Fang Hospital, Taipei, Taiwan, R.O.C
| | - Chia-Hsien Lin
- Department of Nursing, Ching Kuo Institute of Management and Health, Keelung, Taiwan, R.O.C
| | - Song-Chow Lin
- Graduate Institute of Medical Science, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan, R.O.C
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Domínguez RO, Marschoff ER, Guareschi EM, Repetto MG, Famulari AL, Pagano MA, Serra JA. Insulin, glucose and glycated hemoglobin in Alzheimer’s and vascular dementia with and without superimposed Type II diabetes mellitus condition. J Neural Transm (Vienna) 2007; 115:77-84. [PMID: 17726571 DOI: 10.1007/s00702-007-0804-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Accepted: 08/02/2007] [Indexed: 01/11/2023]
Abstract
Increased concentrations of insulin, glucose and glycohemoglobin are associated with Type II diabetes mellitus (DM) and recognized as characteristic markers of the disease; in Alzheimer's (AD), Vascular dementia (VaD), and both dementia's with superimposed diabetes (AD + DM, VaD + DM) the knowledge is scarce. The sample (n = 122; males = 60; mean age = 73 +/- 7) comprised DM, AD, VaD, AD + DM, and VaD + DM patients, and healthy controls (C). The ANOVA's yielded significant differences between groups: Insulin p = 3.7 x 10(-3); Glucose p < 10(-12); Glycohemoglobin p = 9.2x10(-4). Comparisons between groups (DM vs. C, AD + DM vs. AD, VaD + DM vs. VaD, and demented DM vs. non-demented DM) resulted significant for all variables (Bonferroni's statistic, alpha = 0.05). Diabetic and diabetic demented patients presented significant increases largely different from controls (0.01 < p < 0.001), unlike the non-significant changes in their non-diabetic counterparts; linear relationships were found across all groups. The correlation's insulin/glucose and insulin/glycohemoglobin change to positive within demented groups, indicating a different performance of insulin in demented and non-demented subjects.
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Affiliation(s)
- R O Domínguez
- Facultad de Medicina, Hospital Sirio-Libanés, UBA, FACENE, Buenos Aires, Argentina
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Casado A, Encarnación López-Fernández M, Concepción Casado M, de La Torre R. Lipid peroxidation and antioxidant enzyme activities in vascular and Alzheimer dementias. Neurochem Res 2007; 33:450-8. [PMID: 17721818 DOI: 10.1007/s11064-007-9453-3] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2007] [Accepted: 07/20/2007] [Indexed: 11/30/2022]
Abstract
It has been reported that oxidative stress may play a role in the pathogenesis of dementia of the Alzheimer type (AD) and the cerebral ischemia which causes vascular dementia (VD). We measured malondialdehyde (MDA) levels and superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione reductase (GR) activities in blood samples from patients with AD and VD and in healthy non-demented controls (CTR) which similar ages to the patients, in order to evaluate the degree of oxidative stress in patients with AD and VD. A sample of 150 subjects consisting of 50 patients with AD; 50 patients with VD and 50 CTR, aged from 65 to 85 years on, was analyzed. Most of the changes observed were in SOD activity and MDA levels. Catalase activity were least affected. Significant differences were observed in SOD and GR activity between males and females in CRT and in patients with AD, but not in VD. We have found a decrease in antioxidant enzymes activities (SOD, CAT, GPx and GR) in patients with AD and VD and significant differences were observed between CRT and AD patients for ages from 65 to 74, 75 to 84 and from 85 years to 94 years in SOD activity and MDA levels (P < 0.001). MDA levels increase with age in VD, AD and CTR. No significant variation with respect to sex were detected, but significant variations in MDA levels were detected between CRT and patients with VD and AD (P < 0.001). We conclude that oxidative stress plays an important role in the brain damage for both AD and VD, being observed higher levels of oxidative stress for AD that for VD.
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Affiliation(s)
- Angela Casado
- Departamento de Fisiopatología Celular y Molecular, Centro de Investigaciones Biológicas (CSIC), Ramiro de Maeztu, 9, Madrid 28040, Spain.
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Domínguez RO, Marschoff ER, Guareschi EM, Famulari AL, Pagano MA, Serra JA. Homocysteine, vitamin B 12 and folate in Alzheimer's and vascular dementias: The paradoxical effect of the superimposed type II diabetes mellitus condition. Clin Chim Acta 2005; 359:163-70. [PMID: 15935339 DOI: 10.1016/j.cccn.2005.03.049] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2005] [Revised: 03/18/2005] [Accepted: 03/24/2005] [Indexed: 10/25/2022]
Abstract
BACKGROUND Increased concentration of plasmatic homocysteine (tHcy) and decreased vitamin B 12 (B12) and folate (FOL) are associated with Alzheimer's (AD) and vascular (VaD) dementias, with type II diabetes mellitus (DM), and reported as risk factors of these diseases. METHODS The sample (n=122; males=60; mean age=73+/-7 years) comprised AD and VaD patients without DM, with a concomitant DM (AD+DM, VaD+DM), DM alone and controls (CTR), resulting in 6 groups. tHcy, B12 and FOL were determined in duplicate. RESULTS The one-way ANOVA yielded significant differences between groups for all variables: tHcy p<10(-12); B12 p<10(-3); FOL p<10(-4). Significance for comparisons between groups was set at alpha=0.05, using the Bonferroni's statistic. The comparisons: DM vs. CTR, AD+DM vs. AD, VaD+DM vs. VaD, and DM demented vs. DM non-demented resulted significant for all variables, except for B12 in 2 comparisons. CONCLUSIONS In demented and control subjects, tHcy and FOL exhibit extreme differences, not so marked between DM and controls. Demented patients with concomitant diabetes are closer to controls than their non-diabetic counterparts. Diabetes affects tHcy and FOL values, which are changed with opposite sign to non-demented. These results suggests a paradoxical phenomenon when diabetes is superimposed to dementias.
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Affiliation(s)
- Raúl O Domínguez
- Facultad de Medicina, Hospital Sirio-Libanés-UBA, FACENE, Buenos Aires, Argentina
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Valdivia A, Perez Y, Dominguez A, Caballero J, Gomez L, Schacht EH, Villalonga R. Improved anti-inflammatory and pharmacokinetic properties for superoxide dismutase by chemical glycosidation with carboxymethylchitin. Macromol Biosci 2005; 5:118-23. [PMID: 15729720 DOI: 10.1002/mabi.200400114] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
O-carboxymethylchitin (molecular weight = 1.07 x 10(5), degree of carboxymethylation = 80%, degree of N-acetylation = 91%) was chemically attached to superoxide dismutase by the formation of amide linkages through a carbodiimide catalyzed reaction. The glycosidated enzyme contained about 1.8 mole of polysaccharide per mole of protein and retained 57% of the initial catalytic activity. The anti-inflammatory activity of the enzyme was 2.4 times increased after conjugation with the polysaccharide. The modified superoxide dismutase preparation was remarkably more resistant to inactivation with H(2)O(2) and its plasma half-life time was prolonged from 4.8 min to 69 h.
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Affiliation(s)
- Aimara Valdivia
- Enzyme Technology Group, Center for Biotechnological Studies, University of Matanzas, Autopista a Varadero Km 3 1/2, Matanzas, C.P. 44740, Cuba
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