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Ghosh N, Das A, Biswas N, Mahajan SP, Madeshiya AK, Khanna S, Sen CK, Roy S. MYO-Inositol In Fermented Sugar Matrix Improves Human Macrophage Function. Mol Nutr Food Res 2022; 66:e2100852. [PMID: 35073444 PMCID: PMC9420542 DOI: 10.1002/mnfr.202100852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/07/2021] [Indexed: 11/07/2022]
Abstract
SCOPE Reactive oxygen species production by innate immune cells plays a central role in host defense against invading pathogens at wound-site. A weakened hos-defense results in persistent infection leading to wound chronicity. Fermented Papaya Preparation (FPP), a complex sugar matrix, bolstered respiratory burst activity and improved wound healing outcomes in chronic wound patients. The objective of the current study was to identify underlying molecular factor/s responsible for augmenting macrophage host defense mechanisms following FPP supplementation. METHODS AND RESULTS In depth LC-MS/MS analysis of cells supplemented with FPP led to identification of myo-inositol as a key determinant of FPP activity towards improving macrophage function. Myo-inositol, in quantities that is present in FPP, significantly improved macrophage respiratory burst and phagocytosis via de novo synthesis pathway of ISYNA1. Additionally, myo-inositol transporters, HMIT and SMIT1, played a significant role in such activity. Blocking these pathways using siRNA attenuated FPP-induced improved macrophage host defense activities. FPP supplementation emerges as a novel approach to increase intracellular myo-inositol levels. Such supplementation also modified wound microenvironment in chronic wound patients to augment myo-inositol levels in wound fluid. CONCLUSION These observations indicate that myo-inositol in FPP influences multiple aspects of macrophage function critical for host defense against invading pathogens. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Nandini Ghosh
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Amitava Das
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Nirupam Biswas
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Sanskruti P Mahajan
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Amit K Madeshiya
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Savita Khanna
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Chandan K Sen
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Sashwati Roy
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
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Wang L, Wang G, Duan Y, Wang F, Lin S, Zhang F, Li H, Li A, Li H. A Comparative Study of the Diagnostic Potential of Plasma and Erythrocytic α-Synuclein in Parkinson's Disease. NEURODEGENER DIS 2020; 19:204-210. [PMID: 32485710 DOI: 10.1159/000506480] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 02/10/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Parkinson's disease (PD) is a neurodegenerative disease characterized by intracellular α-synuclein (α-Syn) deposition. Alternation of the α-Syn expression level in plasma or erythrocytes may be used as a potential PD biomarker. However, no studies have compared their prognostic value directly with the same cohort. METHODS The levels of α-Syn in plasma and erythrocytes, obtained from 45 PD patients and 45 control subjects, were measured with enzyme-linked immunosorbent assay. Then, correlation and receiver operating characteristic curve (ROC) analysis were performed to characterize the predictive power of erythrocytic and plasma α-Syn. RESULTS Our results showed that α-Syn expression levels in both plasma and erythrocytes were significantly higher in PD patients than in control subjects (823.14 ± 257.79 vs. 297.10 ± 192.82 pg/mL, p < 0.0001 in plasma; 3,104.14 ± 143.03 vs. 2,944.82 ± 200.41 pg/mL, p < 0.001 in erythrocytes, respectively). The results of the ROC analysis suggested that plasma α-Syn exhibited better predictive power than erythrocytic α-Syn with a sensitivity of 80.0%, specificity of 97.7%, and a positive predictive value of 77.8%. The expression level of plasma α-Syn correlated well with the age of patients, H-Y stage, MoCA scale, and UPDRS motor scale. On the contrary, there was no correlation between erythrocytic α-Syn level and clinical parameters in this study. CONCLUSION Our results suggest that plasma α-Syn could be a specific and sensitive potential diagnostic biomarker for PD.
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Affiliation(s)
- Luxuan Wang
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China.,Department of Neurology, General Hospital of Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, China
| | - Guowei Wang
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China.,Department of Neurology, General Hospital of Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, China
| | - Yangyang Duan
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China.,Department of Neurology, General Hospital of Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, China
| | - Feng Wang
- Department of Neurosurgery, General Hospital of Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, China
| | - Shaoqing Lin
- Department of Neurology, Brain Center of Sunshine Union Hospital, Sunshine Union Hospital, Weifang, China
| | - Fengting Zhang
- School of Clinical Medicine, Ningxia Medical University, Yinchuan, China.,Department of Neurology, General Hospital of Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, China
| | - Hui Li
- Department of Computer Science, Jiangsu Ocean University, Lianyungang, China
| | - Andy Li
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute Biotechnology Enterprise (BRITE), North Carolina Central University, Durham, North Carolina, USA,
| | - Haining Li
- Department of Neurology, General Hospital of Ningxia Medical University, Ningxia Key Laboratory of Cerebrocranial Diseases, Incubation Base of National Key Laboratory, Yinchuan, China
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Logozzi M, Di Raimo R, Mizzoni D, Andreotti M, Spada M, Macchia D, Fais S. Beneficial Effects of Fermented Papaya Preparation (FPP ®) Supplementation on Redox Balance and Aging in a Mouse Model. Antioxidants (Basel) 2020; 9:antiox9020144. [PMID: 32046112 PMCID: PMC7070551 DOI: 10.3390/antiox9020144] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 01/31/2020] [Accepted: 02/05/2020] [Indexed: 12/18/2022] Open
Abstract
In recent decades much attention has been paid to how dietary antioxidants may positively affect the human health, including the beneficial effects of fermented foods and beverages. Fermented Papaya Preparation (FPP®) has been shown to represent a valuable approach to obtain systemic antioxidants effect. In this study, we wanted to verify whether FPP® had a clear and scientifically supported in vivo anti-aging effect together with the induction of a systemic antioxidant reaction. To this purpose we daily treated a mouse model suitable for aging studies (C57BL/6J) with FPP®-supplemented water from either the 6th weeks (early treatment) or the 51th weeks (late treatment) of age as compared to mice receiving only tap water. After 10 months of FPP® treatment, we evaluated the telomerase activity, antioxidants and Reactive Oxygen Species ROS plasmatic levels and the telomeres length in the bone marrow and ovaries in both mice groups. The results showed that the daily FPP® assumption induced increase in telomeres length in bone marrow and ovary, together with an increase in the plasmatic levels of telomerase activity, and antioxidant levels, with a decrease of ROS. Early treatment resulted to be more effective, suggesting a potential key role of FPP® in preventing the age-related molecular damages.
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Affiliation(s)
- Mariantonia Logozzi
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (M.L.); (R.D.R.); (D.M.)
| | - Rossella Di Raimo
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (M.L.); (R.D.R.); (D.M.)
| | - Davide Mizzoni
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (M.L.); (R.D.R.); (D.M.)
| | - Mauro Andreotti
- National Center for Global Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy;
| | - Massimo Spada
- Centro Nazionale Sperimentazione e Benessere Animale, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (M.S.); (D.M.)
| | - Daniele Macchia
- Centro Nazionale Sperimentazione e Benessere Animale, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (M.S.); (D.M.)
| | - Stefano Fais
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy; (M.L.); (R.D.R.); (D.M.)
- Correspondence: ; Tel.: +39-0649903195; Fax: +39-0649902436
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Modulatory Effect of Fermented Papaya Extracts on Mammary Gland Hyperplasia Induced by Estrogen and Progestin in Female Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:8235069. [PMID: 29359010 PMCID: PMC5735651 DOI: 10.1155/2017/8235069] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 08/24/2017] [Accepted: 09/25/2017] [Indexed: 01/16/2023]
Abstract
Fermented papaya extracts (FPEs) are obtained by fermentation of papaya by Aspergillus oryzae and yeasts. In this study, we investigated the protective effects of FPEs on mammary gland hyperplasia induced by estrogen and progestogen. Rats were randomly divided into 6 groups, including a control group, an FPE-alone group, a model group, and three FPE treatment groups (each receiving 30, 15, or 5 ml/kg FPEs). Severe mammary gland hyperplasia was induced upon estradiol benzoate and progestin administration. FPEs could improve the pathological features of the animal model and reduce estrogen levels in the serum. Analysis of oxidant indices revealed that FPEs could increase superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities, decrease malondialdehyde (MDA) level in the mammary glands and serum of the animal models, and decrease the proportion of cells positive for the oxidative DNA damage marker 8-oxo-dG in the mammary glands. Additionally, estradiol benzoate and progestin altered the levels of serum biochemical compounds such as aspartate transaminase (AST), total bilirubin (TBIL), and alanine transaminase (ALT), as well as hepatic oxidant indices such as SOD, GSH-Px, MDA, and 8-oxo-2′-deoxyguanosine (8-oxo-dG). These indices reverted to normal levels upon oral administration of a high dose of FPEs. Taken together, our results indicate that FPEs can protect the mammary glands and other visceral organs from oxidative damage.
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Marotta F, Marcellino M, Solimene U, Cuffari B, Yadav H, Khokhlov AN, Lorenzetti A, Mantello A, Cervi J, Catanzaro R. A 2-year Double-Blind RCT Follow-up Study with Fermented Papaya Preparation (FPP) Modulating Key Markers in Middle-Age Subjects with Clustered Neurodegenerative Disease-Risk Factors. CLINICAL PHARMACOLOGY & BIOPHARMACEUTICS 2017; 6. [PMID: 31007971 PMCID: PMC6474671 DOI: 10.4172/2167-065x.1000170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In recent years a number of studies have reported the significant relationship between metabolic syndrome and neurodegenerative disease. There is accumulating evidence that the interplay of combined genetic and environmental risk factors (from diet to life style to pollutants) to intrinsic age-related oxi-inflammatory changes may be advocated for to explain the pandemic of neurodegenerative diseases. In recent years a specific Fermented Papaya Preparation (FPP) has been shown to significantly affect a number of redox signalling abnormalities in a variety of chronic diseases and as well in aging mechanisms either on experimental and on clinical ground. The aim of the present study was to evaluate FPP use in impending metabolic disease patients with potentially neurodegenerative disease clustered risk factors. The study population consisted of 90 patients aged 45-65 years old, with impending metabolic syndrome and previously selected as to be ApoE4 genotype negative. By applying a RCT, double-blind method, one group received FPP 4.5 g twice a day (the most common dosage utilized in prior clinical studies) while the other received an oral antioxidant cocktail (trans-resveratrol, selenium, vitamin E, vitamin C). Then, after 21 month treatment period, a selected heavy metal chelator was added at the dosage of 3 g/nocte for the final 3 months study treatment. The parameters tested were: routine tests oxidized LDL-cholesterol, anti-oxidised LDL, Cyclophilin-A (CyPA), plasminogen activator inhibitor-1 and CyPA gene expression. From this study it would appear that FPP, unlike the control antioxidant, significantly decreased oxidized-LDL and near normalizing the anti-Ox-LDL/Ox-LDL ratio (p<0.001) although unaffecting the lipid profile per sè. Moreover, only FPP decreased cyclophilin-A plasma level and plasminogen activator-inhibitor (p<0.01) together with downregulating cyclophilin-A gene expression (p<0.01). Insulin resistance was only mildly improved. Heavy metals gut clearance proved to be effectively enhanced by the chelator (p<0.01) and this was not affected by any of the nutraceuticals, nor it added any further benefit to the biological action of FPP.
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Affiliation(s)
- Francesco Marotta
- ReGenera Research Group for Aging Intervention, San Babila Clinic, Milano, Italy
| | | | - Umberto Solimene
- WHO-Center for Traditional Medicine and Biotechnology, University of Milano, Italy
| | - Biagio Cuffari
- Department of Internal Medicine, University of Catania, Catania, Italy
| | - Hariom Yadav
- Center for Diabetes, Obesity and Metabolism, Wake Forest Medical Center, Biotech Place, Winston-Salem, USA
| | - Alexander N Khokhlov
- Evolutionary Cytogerontology Sector, School of Biology, Moscow State University, Moscow, Russia
| | - Aldo Lorenzetti
- ReGenera Research Group for Aging Intervention, San Babila Clinic, Milano, Italy
| | | | - Joseph Cervi
- ReGenera Research Group for Aging Intervention, San Babila Clinic, Milano, Italy
| | - Roberto Catanzaro
- Department of Internal Medicine, University of Catania, Catania, Italy
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Vij T, Prashar Y. A review on medicinal properties of Carica papaya Linn. ASIAN PACIFIC JOURNAL OF TROPICAL DISEASE 2015. [DOI: 10.1016/s2222-1808(14)60617-4] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Dickerson R, Deshpande B, Gnyawali U, Lynch D, Gordillo GM, Schuster D, Osei K, Roy S. Correction of aberrant NADPH oxidase activity in blood-derived mononuclear cells from type II diabetes mellitus patients by a naturally fermented papaya preparation. Antioxid Redox Signal 2012; 17:485-91. [PMID: 22369197 PMCID: PMC3365356 DOI: 10.1089/ars.2011.4292] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 02/08/2012] [Indexed: 01/01/2023]
Abstract
UNLABELLED Supplementation of standardized fermented papaya preparation (FPP) to adult diabetic mice improves dermal wound healing outcomes. Peripheral blood mononuclear cells (PBMC) from type II diabetes mellitus (T2DM) patients elicit a compromised respiratory burst activity resulting in increased risk of infections for the diabetic patients. AIMS The objectives of the current study were to determine the effect of FPP supplementation on human diabetic PBMC respiratory burst activity and to understand underlying mechanisms of such action of FPP. RESULTS When stimulated with phorbol 12-myristate 13-acetate, the production of reactive oxygen species by T2DM PBMC was markedly compromised compared to that of the PBMC from non-DM donors. FPP treated ex vivo improved respiratory burst outcomes in T2DM PBMC. FPP treatment significantly increased phosphorylation of the p47phox subunit of NADPH oxidase. In addition, the protein and mRNA expression of Rac2 was potently upregulated after FPP supplemention. The proximal human Rac2 gene promoter is G-C rich and contains consensus binding sites for Sp1 and AP-1. While FPP had no significant effect on the AP-1 DNA binding activity, the Sp1 DNA binding activity was significantly upregulated in PBMC after treatment of the cells with FPP. INNOVATION This work provided first evidence that compromised respiratory burst performance of T2DM PBMC may be corrected by a nutritional supplement. CONCLUSION FPP can correct respiratory burst performance of T2DM PBMC via an Sp-1-dependant pathway. Studies testing the outcome of FPP supplementation in diabetic patients are warranted.
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Affiliation(s)
- Ryan Dickerson
- Department of Surgery, Comprehensive Wound Center, Davis Heart and Lung Research Institute, The Ohio State University Medical Center, Columbus, Ohio
| | - Bhakthi Deshpande
- Department of Surgery, Comprehensive Wound Center, Davis Heart and Lung Research Institute, The Ohio State University Medical Center, Columbus, Ohio
| | - Urmila Gnyawali
- Department of Surgery, Comprehensive Wound Center, Davis Heart and Lung Research Institute, The Ohio State University Medical Center, Columbus, Ohio
| | - Debbie Lynch
- Department of Surgery, Comprehensive Wound Center, Davis Heart and Lung Research Institute, The Ohio State University Medical Center, Columbus, Ohio
| | - Gayle M. Gordillo
- Department of Surgery, Comprehensive Wound Center, Davis Heart and Lung Research Institute, The Ohio State University Medical Center, Columbus, Ohio
| | - Dara Schuster
- Endocrinology, Diabetes, and Metabolism, Department of Internal Medicine, The Ohio State University Medical Center, Columbus, Ohio
| | - Kwame Osei
- Endocrinology, Diabetes, and Metabolism, Department of Internal Medicine, The Ohio State University Medical Center, Columbus, Ohio
| | - Sashwati Roy
- Department of Surgery, Comprehensive Wound Center, Davis Heart and Lung Research Institute, The Ohio State University Medical Center, Columbus, Ohio
- Endocrinology, Diabetes, and Metabolism, Department of Internal Medicine, The Ohio State University Medical Center, Columbus, Ohio
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Marotta F, Yadav H, Kumari A, Catanzaro R, Jain S, Polimeni A, Lorenzetti A, Soresi V. Cardioprotective effect of a biofermented nutraceutical on endothelial function in healthy middle-aged subjects. Rejuvenation Res 2012; 15:178-81. [PMID: 22533427 DOI: 10.1089/rej.2011.1276] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We tested a biofermented nutraceutical (FPP) that has been previously shown to positively modulate nitric oxide (NO). Forty-two healthy middle-aged subjects were given 3 grams of FPP three times a day for 6 weeks, and tests were repeated at 3 and 6 weeks; the control group was given a placebo. Flow-mediated dilation (FMD) was measured together with NO compounds (nitrogen oxides [NOx]: NO(2)(-)+NO(3)(-)) plasma levels and asymmetrical dimethylarginine (ADMA). In the interventional group, overall FMD significantly increased from 4.2% to 7.3% (p<0.05 vs. placebo). A significant increase in plasma NO and a decrease in ADMA were detected after consumption of FPP (p<0.01). Although larger studies are awaited, it appears that, at least in healthy individuals, such nutraceutical intervention by positively acting on significant cardiovascular parameters can be considered in the armamentarium of a proactive age-management strategy.
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Collard E, Roy S. Improved function of diabetic wound-site macrophages and accelerated wound closure in response to oral supplementation of a fermented papaya preparation. Antioxid Redox Signal 2010; 13:599-606. [PMID: 20095880 PMCID: PMC2935338 DOI: 10.1089/ars.2009.3039] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Carica papaya Linn is widely known as a medicinal fruit. We sought to study a standardized fermented papaya preparation (FPP) for its effects on wound healing in adult obese diabetic (db/db) mice. FPP blunted the gain in blood glucose and improved the lipid profile after 8 weeks of oral supplementation. However, FPP did not influence weight gain during the supplementation period. FPP (0.2 g/kg body weight) supplementation for 8 weeks before wounding was effective in correcting wound closure. Studies on viable macrophages isolated from the wound site demonstrated that FPP supplementation improved respiratory-burst function as well as inducible NO production. Reactive oxygen species support numerous aspects of wound healing; NO availability in diabetic wounds is known to be compromised. Diabetic mice supplemented with FPP showed a higher abundance of CD68 as well as CD31 at the wound site, suggesting effective recruitment of monocytes and an improved proangiogenic response. This work provides the first evidence that diabetic-wound outcomes may benefit from FPP supplementation by specifically influencing the response of wound-site macrophages and the subsequent angiogenic response. Given that FPP has a long track record of safe human consumption, testing of the beneficial effects of FPP on diabetic wound-related outcomes in a clinical setting is warranted.
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Affiliation(s)
- Eric Collard
- Comprehensive Wound Center, Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Medical Center, Columbus, Ohio 43210, USA
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Mansur PHG, Cury LKP, Leite JOB, Pereira AA, Penha-Silva N, Andrade AO. The approximate entropy of the electromyographic signals of tremor correlates with the osmotic fragility of human erythrocytes. Biomed Eng Online 2010; 9:29. [PMID: 20569460 PMCID: PMC2895611 DOI: 10.1186/1475-925x-9-29] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Accepted: 06/22/2010] [Indexed: 03/23/2024] Open
Abstract
BACKGROUND The main problem of tremor is the damage caused to the quality of the life of patients, especially those at more advanced ages. There is not a consensus yet about the origins of this disorder, but it can be examined in the correlations between the biological signs of aging and the tremor characteristics. METHODS This work sought correlations between the osmotic fragility of erythrocytes and features extracted from electromyographic (EMG) activity resulting from physiological tremor in healthy patients (N = 44) at different ages (24-87 years). The osmotic fragility was spectrophotometrically evaluated by the dependence of hemolysis, provided by the absorbance in 540 nm (A54o), on the concentration of NaCl. The data were adjusted to curves of sigmoidal regression and characterized by the half transition point (H50), amplitude of lysis transition (dx) and values of A540 in the curve regions that characterize the presence of lysed (A1) and preserved erythrocytes (A2). The approximate entropy was estimated from EMG signals detected from the extensor carpi ulnaris muscle during the movement of the hand of subjects holding up a laser pen towards an Archimedes spiral, fixed in a whiteboard. The evaluations were carried out with the laser pen at rest, at the center of the spiral, and in movement from the center to the outside and from outside to the center. The correlations among the parameters of osmotic fragility, tremor and age were tested. RESULTS Negative correlations with age were found for A1 and dx. With the hand at rest, a positive correlation with H50 was found for the approximate entropy. Negative correlations with H50 were found for the entropy with the hand in movement, as from the center to the outside or from the outside to the center of the spiral. CONCLUSION In healthy individuals, the increase in the erythrocyte osmotic fragility was associated with a decrease in the approximate entropy for rest tremor and with an increase of the entropy for movement tremor. This suggests that the neuromuscular degeneration associated with tremor entails also the mechanisms involved in the breakdown of structural homeostasis of the erythrocyte membrane.
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Affiliation(s)
- Paulo HG Mansur
- Biomedical Engineering Laboratory, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Minas Gerais, 38.408-100, Brazil
| | - Lacordaire KP Cury
- Biomedical Engineering Laboratory, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Minas Gerais, 38.408-100, Brazil
| | - José OB Leite
- Institute of Genetics and Biochemistry, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - Adriano A Pereira
- Biomedical Engineering Laboratory, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Minas Gerais, 38.408-100, Brazil
| | - Nilson Penha-Silva
- Institute of Genetics and Biochemistry, Federal University of Uberlândia, Uberlândia, MG, 38400-902, Brazil
| | - Adriano O Andrade
- Biomedical Engineering Laboratory, Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia, Minas Gerais, 38.408-100, Brazil
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de Grey ADNJ. The case for prioritizing research on late-onset life-extension interventions in mammals. Rejuvenation Res 2007; 10:257-9. [PMID: 17822351 DOI: 10.1089/rej.2007.0547] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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