scholarly journals Glyoxalase System in the Progression of Skin Aging and Skin Malignancies

2020 ◽  
Vol 22 (1) ◽  
pp. 310
Author(s):  
Silvia Yumnam ◽  
Lalita Subedi ◽  
Sun Yeou Kim
Keyword(s):  
Glucose Metabolism ◽  
Skin Aging ◽  
The Body ◽  
Glyoxalase I ◽  
Health Issues ◽  
Future Prospects ◽  
Glyoxalase System ◽  
Skin Abnormalities ◽  
Anticancer Drug Development

Dicarbonyl compounds, including methylglyoxal (MGO) and glyoxal (GO), are mainly formed as byproducts of glucose metabolism. The main glyoxalase system consists of glyoxalase I and II (Glo1 and Glo2) and is the main enzyme involved in the detoxification of dicarbonyl stress, which occurs as an accumulation of MGO or GO due to decreased activity or expression of Glo1. Dicarbonyl stress is a major cause of cellular and tissue dysfunction that causes various health issues, including diabetes, aging, and cancer. The skin is the largest organ in the body. In this review, we discuss the role of the glyoxalase system in the progression of skin aging, and more importantly, skin malignancies. We also discuss the future prospects of the glyoxalase system in other skin abnormalities such as psoriasis and vitiligo, including hyperpigmentation. Finally, in the present review, we suggest the role of glyoxalase in the progression of skin aging and glyoxalase system as a potential target for anticancer drug development for skin cancer.

scholarly journals Role of small leucine zipper protein in hepatic gluconeogenesis and metabolic disorder

2020 ◽  
Author(s):  
Minsoo Kang ◽  
Sun Kyoung Han ◽  
Suhyun Kim ◽  
Sungyeon Park ◽  
Yerin Jo ◽  
...  
Keyword(s):  
Blood Glucose ◽  
Glucose Metabolism ◽  
Metabolic Disorder ◽  
Leucine Zipper ◽  
Metabolic Diseases ◽  
Adenosine Monophosphate ◽  
The Body ◽  
Hepatic Gluconeogenesis ◽  
Leucine Zipper Protein

Abstract Hepatic gluconeogenesis is the central pathway for glucose generation in the body. The imbalance between glucose synthesis and uptake leads to metabolic diseases such as obesity, diabetes, and cardiovascular diseases. Small leucine zipper protein (sLZIP) is an isoform of LZIP and it mainly functions as a transcription factor. Although sLZIP is known to regulate the transcription of genes involved in various cellular processes, the role of sLZIP in hepatic glucose metabolism is not known. In this study, we investigated the regulatory role of sLZIP in hepatic gluconeogenesis and its involvement in metabolic disorder. We found that sLZIP expression was elevated during glucose starvation, leading to the promotion of phosphoenolpyruvate carboxylase and glucose-6-phosphatase expression in hepatocytes. However, sLZIP knockdown suppressed the expression of the gluconeogenic enzymes under low glucose conditions. sLZIP also enhanced glucose production in the human liver cells and mouse primary hepatic cells. Fasting-induced cyclic adenosine monophosphate impeded sLZIP degradation. Results of glucose and pyruvate tolerance tests showed that sLZIP transgenic mice exhibited abnormal blood glucose metabolism. These findings suggest that sLZIP is a novel regulator of gluconeogenic enzyme expression and plays a role in blood glucose homeostasis during starvation.

scholarly journals Diet and Skin Aging—From the Perspective of Food Nutrition

Nutrients ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 870 ◽  
Author(s):  
Changwei Cao ◽  
Zhichao Xiao ◽  
Yinglong Wu ◽  
Changrong Ge
Keyword(s):  
Human Life ◽  
Skin Aging ◽  
The Body ◽  
Research Progress ◽  
Healthy Skin ◽  
Internal Factors ◽  
Chronological Aging ◽  
Complex Biological Process ◽  
Food And Nutrition

We regularly face primary challenges in deciding what to eat to maintain young and healthy skin, defining a healthy diet and the role of diet in aging. The topic that currently attracts maximum attention is ways to maintain healthy skin and delay skin aging. Skin is the primary barrier that protects the body from external aggressions. Skin aging is a complex biological process, categorized as chronological aging and photo-aging, and is affected by internal factors and external factors. With the rapid breakthrough of medicine in prolonging human life and the rapid deterioration of environmental conditions, it has become urgent to find safe and effective methods to treat skin aging. For diet, as the main way for the body to obtain energy and nutrients, people have gradually realized its importance to the skin. Therefore, in this review, we discuss the skin structure, aging manifestations, and possible mechanisms, summarize the research progress, challenges, possible directions of diet management, and effects of foodborne antioxidants on skin aging from the perspective of food and nutrition.

scholarly journals Ultraviolet Radiation-Induced Skin Aging: The Role of DNA Damage and Oxidative Stress in Epidermal Stem Cell Damage Mediated Skin Aging

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Uraiwan Panich ◽  
Gunya Sittithumcharee ◽  
Natwarath Rathviboon ◽  
Siwanon Jirawatnotai
Keyword(s):  
Oxidative Stress ◽  
Stem Cells ◽  
Dna Damage ◽  
Mesenchymal Stem Cells ◽  
Stem Cell ◽  
Ultraviolet Radiation ◽  
Skin Aging ◽  
The Body ◽  
And Oxidative Stress

Skin is the largest human organ. Skin continually reconstructs itself to ensure its viability, integrity, and ability to provide protection for the body. Some areas of skin are continuously exposed to a variety of environmental stressors that can inflict direct and indirect damage to skin cell DNA. Skin homeostasis is maintained by mesenchymal stem cells in inner layer dermis and epidermal stem cells (ESCs) in the outer layer epidermis. Reduction of skin stem cell number and function has been linked to impaired skin homeostasis (e.g., skin premature aging and skin cancers). Skin stem cells, with self-renewal capability and multipotency, are frequently affected by environment. Ultraviolet radiation (UVR), a major cause of stem cell DNA damage, can contribute to depletion of stem cells (ESCs and mesenchymal stem cells) and damage of stem cell niche, eventually leading to photoinduced skin aging. In this review, we discuss the role of UV-induced DNA damage and oxidative stress in the skin stem cell aging in order to gain insights into the pathogenesis and develop a way to reduce photoaging of skin cells.

scholarly journals QUAL O PAPEL DO SISTEMA IMUNE NAS MORTES POR MALÁRIA?

2019 ◽  
Vol 6 (1) ◽  
pp. 58-62
Author(s):  
Gabriel Ferraz Campos Basilio ◽  
Lucília Fraissat Santana ◽  
Matheus Moreira
Keyword(s):  
Immune Response ◽  
Immune System ◽  
Global Health ◽  
The Body ◽  
Health Issues ◽  
Biological Cycle ◽  
Malaria Therapy ◽  
The North ◽  
New Research

biológico complexo que pode causar diferentes reações imunes no organismo. Essa resposta imune leva a manifestações leves ou graves da doença. O objetivo deste trabalho é abordar o papel do sistema imune na fisiopatologia da malária e suas complicações. Visando assim, definir  a melhor abordagem a ser seguida pelas novos trabalhos em terapêutica da malária. Palavras-chave: malária; sistema imune; fisiopatologia; complicações. ABSTRACT Malaria is one of the leading global health issues; it causes more than a million deaths each year. In Brazil, malaria cases are mainly concentrated in the north region of the country. The disease is caused by a complex biological cycle parasite which can cause different immune reactions in the body. This immune response leads to mild or severe manifestations of the disease. The objective of this work is to address the role of the immune system in the pathophysiology of malaria and its complications. In this way, we can define the best approach to new research in malaria therapy. Keywords: malaria; immune system; physiopathology; complications.

scholarly journals Glucose Metabolism: The Metabolic Signature of Tumor Associated Macrophage

2021 ◽  
Vol 12 ◽  
Author(s):  
Qi Zhang ◽  
Junli Wang ◽  
Dipesh Kumar Yadav ◽  
Xueli Bai ◽  
Tingbo Liang
Keyword(s):  
Glucose Metabolism ◽  
Immune Responses ◽  
The Body ◽  
Cancer Targeting ◽  
Special Role ◽  
Tumor Associated Macrophage ◽  
Metabolic Signature ◽  
Major Energy Source ◽  
Macrophage Phenotypes

Macrophages exist in most tissues of the body, where they perform various functions at the same time equilibrating with other cells to maintain immune responses in numerous diseases including cancer. Recently, emerging investigations revealed that metabolism profiles control macrophage phenotypes and functions, and in turn, polarization can trigger metabolic shifts in macrophages. Those findings implicate a special role of metabolism in tumor-associated macrophages (TAMs) because of the sophisticated microenvironment in cancer. Glucose is the major energy source of cells, especially for TAMs. However, the complicated association between TAMs and their glucose metabolism is still unclearly illustrated. Here, we review the recent advances in macrophage and glucose metabolism within the tumor microenvironment, and the significant transformations that occur in TAMs during the tumor progression. Additionally, we have also outlined the potential implications for macrophage-based therapies in cancer targeting TAMs.

Prevention of dicarbonyl-mediated advanced glycation by glyoxalases: implication in skin aging

2014 ◽  
Vol 42 (2) ◽  
pp. 518-522 ◽  
Author(s):  
Sabrina Radjei ◽  
Bertrand Friguet ◽  
Carine Nizard ◽  
Isabelle Petropoulos
Keyword(s):  
Reducing Sugars ◽  
Current Knowledge ◽  
Skin Aging ◽  
Advanced Glycation ◽  
Glyoxalase System ◽  
Chronological Aging ◽  
Glyoxalase Ii ◽  
Molecular Features ◽  
Glucose Derivatives

Skin aging is the result of intrinsic chronological aging and photoaging, due to UV exposure, that both share important histological modifications and molecular features, including alterations of proteins. One of the main damage is glycation that occurs when reducing sugars react non-enzymatically with proteins. This reaction also happens when the dicarbonyl compounds GO (glyoxal) and MG (methylglyoxal), which are glucose derivatives, react with proteins. These compounds can be detoxified by the glyoxalase system composed of two enzymes, Glo1 (glyoxalase I) and Glo2 (glyoxalase II). The aims of the present mini-review are to briefly summarize our current knowledge of the biological roles of these enzymes in aging and then discuss the relevance of studying the role of glycation and of detoxifying systems in human skin aging.

Glyoxalase Centennial conference: introduction, history of research on the glyoxalase system and future prospects

2014 ◽  
Vol 42 (2) ◽  
pp. 413-418 ◽  
Author(s):  
Naila Rabbani ◽  
Paul J. Thornalley
Keyword(s):  
Physiological Function ◽  
Physiological Stress ◽  
Glyoxalase I ◽  
Future Prospects ◽  
Glyoxalase System ◽  
Introduction History ◽  
Glyoxalase Ii ◽  
History Of Research ◽  
History Of ◽  
The University

On 27–29 November 2013, researchers gathered at the University of Warwick, Coventry, U.K., to celebrate the centennial of the discovery of the glyoxalase pathway. The glyoxalase system was discovered and reported in papers by Carl Neuberg and by Henry Drysdale Dakin and Harold Ward Dudley in 1913. All three were leading extraordinary investigators in the pioneering years of biochemistry. Neuberg proposed glyoxalase as the pathway of mainstream glycolysis and Gustav Embden correctly discounted this, later confirmed by Otto Meyerhof. Albert Szent-Györgyi proposed glyoxalase I as the regulator of cell growth and others discounted this. In the meantime, molecular, structural and mechanistic properties of the enzymatic components of the system, glyoxalase I and glyoxalase II, have been characterized. The physiological function of the glyoxalase pathway of enzymatic defence against dicarbonyl glycation, particularly by endogenous methylglyoxal, now seems secure. We are now in an era of investigation of the regulation of the glyoxalase system where a role in aging and disease, physiological stress and drug resistance and development of healthier foods and new pharmaceuticals is emerging. The history of glyoxalase research illustrates the scientific process of hypothesis proposal, testing and rejection or acceptance with further investigation, standing testament to the need for intuition guided by experience and expertise, as well as indefatigable experimentation.

scholarly journals γδ-Dioxovalerate as a substrate for the glyoxalase enzyme system

1973 ◽  
Vol 135 (4) ◽  
pp. 713-719 ◽  
Author(s):  
Tadeusz Jerzykowski ◽  
Romana Winter ◽  
Wojciech Matuszewski
Keyword(s):  
Enzyme System ◽  
Tricarboxylic Acid Cycle ◽  
Tricarboxylic Acid ◽  
Glyoxalase I ◽  
Glyoxalase System ◽  
Thiol Ester ◽  
Glyoxalase Ii ◽  
Metabolic Functions ◽  
Metabolic Role

1. Crude γδ-dioxovalerate was synthesized from laevulinate by two different methods and was purified by Sephadex chromatography. Some analytical reactions of the compound are described. 2. γδ-Dioxovalerate is a substrate for glyoxalase I and the GSH derivative formed by this enzyme is hydrolysed by glyoxalase II to form d-α-hydroxyglutarate. The Km of glyoxalase I for γδ-dioxovalerate is 1.0×10−3m at pH5.8.3. The u.v.-absorption spectrum of thiol ester, synthesized enzymically from γδ-dioxovalerate and GSH by glyoxalase I, is almost identical with that for S-lactoylglutathione. Some optical properties of this thiol ester were measured. 4. Attempts to show reversibility of the glyoxalase system reactions with d-α-hydroxyglutarate as substrate were unsuccessful. 5. The possible metabolic role of the γδ-dioxovalerate reaction is discussed. It is suggested that one of the metabolic functions of the glyoxalase system may be to provide a mechanism for the entry of this compound into the tricarboxylic acid cycle.

PREDICTING BIOLOGICAL AGE FROM A SKIN SURFACE CAPACITIVE ANALYSIS

2004 ◽  
Vol 15 (09) ◽  
pp. 1309-1320 ◽  
Author(s):  
ALESSANDRO BEVILACQUA ◽  
ALESSANDRO GHERARDI ◽  
MASSIMO FERRI
Keyword(s):  
Embedded System ◽  
Surface Characterization ◽  
Low Cost ◽  
Skin Surface ◽  
Skin Aging ◽  
The Body ◽  
Biological Age ◽  
Health Issues ◽  
Area Distribution

The skin is the largest (and the most exposed) organ of the body both in terms of surface area and weight. Its care is of great importance for both aesthetics and health issues. Often, the skin appearance gives us information about the skin health status as well as hints at the biological age. Therefore, the skin surface characterization is of great significance for dermatologists as well as for cosmetic scientists in order to evaluate the effectiveness of medical or cosmetic treatments. So far, no in vivo measurements regarding skin topography characterization could be achieved routinely to evaluate skin aging. This work describes how a portable capacitive device, normally used for fingerprint acquisition, can be utilized to achieve measures of skin aging routinely. The capacitive images give a high resolution (50 μm) representation of skin topography, in terms of wrinkles and cells. In this work, we have addressed the latter: through image segmentation techniques, cells have been localized and identified and a feature related to their area distribution has been generated. Accurate experiments accomplished in vivo show how the feature we conceived is linearly related to skin aging. Besides, since this finding has been achieved using a low cost portable device, this could boost research in this field as well as open doors to an application based on an embedded system.

The Role of Polyphenols in the Modulation of Plasma Non-Enzymatic Antioxidant Capacity (NEAC)

2012 ◽  
Vol 82 (3) ◽  
pp. 228-232 ◽  
Author(s):  
Mauro Serafini ◽  
Giuseppa Morabito
Keyword(s):  
Antioxidant Capacity ◽  
Dietary Intervention ◽  
Ex Vivo ◽  
The Body ◽  
Dietary Polyphenols ◽  
Enzymatic Antioxidant ◽  
Endogenous Antioxidant

Dietary polyphenols have been shown to scavenge free radicals, modulating cellular redox transcription factors in different in vitro and ex vivo models. Dietary intervention studies have shown that consumption of plant foods modulates plasma Non-Enzymatic Antioxidant Capacity (NEAC), a biomarker of the endogenous antioxidant network, in human subjects. However, the identification of the molecules responsible for this effect are yet to be obtained and evidences of an antioxidant in vivo action of polyphenols are conflicting. There is a clear discrepancy between polyphenols (PP) concentration in body fluids and the extent of increase of plasma NEAC. The low degree of absorption and the extensive metabolism of PP within the body have raised questions about their contribution to the endogenous antioxidant network. This work will discuss the role of polyphenols from galenic preparation, food extracts, and selected dietary sources as modulators of plasma NEAC in humans.

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