Immune-Mediated Disorders of Skin: Role of Dietary Factors and Plant Extracts?

Gastric cancer is a multifactorial disease with complex interplay of environmental and genetic factors. Helicobacter pylori (H. pylori) infestation has been identified as the most important etiological agent in the pathogenesis of gastric cancer. Also, the role of dietary factors that is low consumption of fruits and vegetables have been found to be associated with gastric cancer. Among the dietary factors, antioxidants especially vitamin C has been found to confer the strongest protection against gastric cancer. Its anti-proliferative and pro-apoptotic action has been suggested in vitro. Because of its antioxidant activity, it protects cells against oxidative DNA damage caused by toxic effects of reactive oxygen species. It also inhibits production of carcinogenic N-nitroso compound in the stomach. The person with H. pylori infection has low levels of vitamin C in their gastric juice and levels of vitamin C normalizes on eradication of H. pylori. Vitamin C levels are high in gastric mucosa and gastric juice, sometimes more than that of in plasma. But gastric pathological conditions cause lowered secretion of vitamin C into gastric juice. Effect of H. pylori on vitamin C in gastric juice is reversible and on eradication of H. pylori, it returns to normal level. Hence, eradication of H. pylori and chemoprevention with antioxidant supplementation will be an effective preventive strategy to reduce the incidence of gastric cancer and related mortality. Vitamin C and gastric cancer is an area of potential interest for researchers as a preventive measure. Keywords: Vitamin C, H. pylori, gastric cancer.

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The Role of Lipids and Membranes in the Pathogenesis of Alzheimer's Disease: A Comprehensive View

Current Alzheimer Research ◽

10.2174/1567205015666180911151716 ◽

2018 ◽

Vol 15 (13) ◽

pp. 1191-1212 ◽

Cited By ~ 23

Author(s):

Botond Penke ◽

Gábor Paragi ◽

János Gera ◽

Róbert Berkecz ◽

Zsolt Kovács ◽

...

Keyword(s):

Alzheimer’S Disease ◽

Alzheimer's Disease ◽

Signaling Pathways ◽

Membrane Lipids ◽

Specific Protein ◽

Dietary Factors ◽

Lipid Signaling ◽

Special Role ◽

Aβ Peptides

Lipids participate in Amyloid Precursor Protein (APP) trafficking and processing - important factors in the initiation of Alzheimer’s disease (AD) pathogenesis and influence the formation of neurotoxic β-amyloid (Aβ) peptides. An important risk factor, the presence of ApoE4 protein in AD brain cells binds the lipids to AD. In addition, lipid signaling pathways have a crucial role in the cellular homeostasis and depend on specific protein-lipid interactions. The current review focuses on pathological alterations of membrane lipids (cholesterol, glycerophospholipids, sphingolipids) and lipid metabolism in AD and provides insight in the current understanding of biological membranes, their lipid structures and functions, as well as their role as potential therapeutic targets. Novel methods for studying the membrane structure and lipid composition will be reviewed in a broad sense whereas the use of lipid biomarkers for early diagnosis of AD will be shortly summarized. Interactions of Aβ peptides with the cell membrane and different subcellular organelles are reviewed. Next, the details of the most important lipid signaling pathways, including the role of the plasma membrane as stress sensor and its therapeutic applications are given. 4-hydroxy-2-nonenal may play a special role in the initiation of the pathogenesis of AD and thus the “calpain-cathepsin hypothesis” of AD is highlighted. Finally, the most important lipid dietary factors and their possible use and efficacy in the prevention of AD are discussed.

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Green synthesis of silver nanoparticles using sustainable resources and their use as antibacterial agents: A review

Current Materials Science ◽

10.2174/2666145413666201207204617 ◽

2020 ◽

Vol 13 ◽

Author(s):

Kumari Jyoti ◽

Punyasloka Pattnaik ◽

Tej Singh

Keyword(s):

Silver Nanoparticles ◽

Plant Extracts ◽

Metallic Nanoparticles ◽

Cost Effective ◽

Biological Properties ◽

Metal Species ◽

Sustainable Resources ◽

Research Areas ◽

Low Toxicity

Background:: Synthesis of metallic nanoparticles has attracted extensive vitality in numerous research areas such as drug delivery, biomedicine, catalysis etc. where continuous efforts are being made by scientists and engineers to investigate new dimensions for both technological and industrial advancements. Amongst numerous metallic nanoparticles, silver nanoparticle (AgNPs) is a novel metal species with low toxicity, higher stability and significant chemical, physical and biological properties. Methods:: In this, various methods for the fabrication of AgNPs are summarized. Importantly, we concentrated on the role of reducing agents of different plants parts, various working conditions such as AgNO3 concentration; ratio of AgNO3/extract; incubation time; centrifugal conditions, size and shapes. Results:: This study suggested that eco-friendly and non toxic biomolecules present in the extracts (e.g. leaf, stem and root) of plants are used as reducing and capping agents for silver nanoparticles fabrication. This method of fabrication of silver nanoparticles using plants extracts is comparatively cost-effective and simple. A silver salt is simply reduced by biomolecules present in the extracts of these plants. In this review, we have emphasized the synthesis and antibacterial potential of silver nanoparticles using various plant extracts. Conclusion:: Fabrication of silver nanoparticles using plant extracts have advantage over the other physical methods, as it is safe, eco-friendly and simple to use. Plants have huge potential for the fabrication of silver nanoparticles of wide potential of applications with desired shape and size.

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Kidney organoid systems for studies of immune-mediated kidney diseases: challenges and opportunities

Cell and Tissue Research ◽

10.1007/s00441-021-03499-4 ◽

2021 ◽

Author(s):

Melissa C. Stein ◽

Fabian Braun ◽

Christian F. Krebs ◽

Madeleine J. Bunders

Keyword(s):

Kidney Diseases ◽

Three Dimensional ◽

Renal Tissue ◽

Chronic Kidney Diseases ◽

Immune Mediated ◽

Primary Epithelial Cell ◽

Challenges And Opportunities ◽

Underlying Mechanisms ◽

Global Population

AbstractAcute and chronic kidney diseases are major contributors to morbidity and mortality in the global population. Many nephropathies are considered to be immune-mediated with dysregulated immune responses playing an important role in the pathogenesis. At present, targeted approaches for many kidney diseases are still lacking, as the underlying mechanisms remain insufficiently understood. With the recent development of organoids—a three-dimensional, multicellular culture system, which recapitulates important aspects of human tissues—new opportunities to investigate interactions between renal cells and immune cells in the pathogenesis of kidney diseases arise. To date, kidney organoid systems, which reflect the structure and closer resemble critical aspects of the organ, have been established. Here, we highlight the recent advances in the development of kidney organoid models, including pluripotent stem cell-derived kidney organoids and primary epithelial cell-based tubuloids. The employment and further required advances of current organoid models are discussed to investigate the role of the immune system in renal tissue development, regeneration, and inflammation to identify targets for the development of novel therapeutic approaches of immune-mediated kidney diseases.

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Role of the IL33 and IL1RL1 pathway in the pathogenesis of Immunoglobulin A vasculitis

Scientific Reports ◽

10.1038/s41598-021-95762-5 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Diana Prieto-Peña ◽

Sara Remuzgo-Martínez ◽

Fernanda Genre ◽

Verónica Pulito-Cueto ◽

Belén Atienza-Mateo ◽

...

Keyword(s):

Inflammatory Diseases ◽

Disease Onset ◽

Immunoglobulin A ◽

Genetic Network ◽

Signalling Pathway ◽

Immune Mediated ◽

Increased Risk ◽

Genotype And Allele Frequencies ◽

Immunoglobulin A Vasculitis

AbstractCytokines signalling pathway genes are crucial factors of the genetic network underlying the pathogenesis of Immunoglobulin-A vasculitis (IgAV), an inflammatory vascular condition. An influence of the interleukin (IL)33- IL1 receptor like (IL1RL)1 signalling pathway on the increased risk of several immune-mediated diseases has been described. Accordingly, we assessed whether the IL33-IL1RL1 pathway represents a novel genetic risk factor for IgAV. Three tag polymorphisms within IL33 (rs3939286, rs7025417 and rs7044343) and three within IL1RL1 (rs2310173, rs13015714 and rs2058660), that also were previously associated with several inflammatory diseases, were genotyped in 380 Caucasian IgAV patients and 845 matched healthy controls. No genotypes or alleles differences were observed between IgAV patients and controls when IL33 and IL1RL1 variants were analysed independently. Likewise, no statistically significant differences were found in IL33 or IL1RL1 genotype and allele frequencies when IgAV patients were stratified according to the age at disease onset or to the presence/absence of gastrointestinal (GI) or renal manifestations. Similar results were disclosed when IL33 and IL1RL1 haplotypes were compared between IgAV patients and controls and between IgAV patients stratified according to the clinical characteristics mentioned above. Our results suggest that the IL33-IL1RL1 signalling pathway does not contribute to the genetic network underlying IgAV.

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Inflammatory Myositis Secondary to Anti-Retroviral Therapy in a Child; Case Report and Review of the Literature

Journal of Neuromuscular Diseases ◽

10.3233/jnd-210669 ◽

2021 ◽

pp. 1-7

Author(s):

Marie Monaghan ◽

Charlotte Loh ◽

Stephen Jones ◽

Agyepong Oware ◽

Kathryn Urankar ◽

...

Keyword(s):

Drug Regimen ◽

Dramatic Improvement ◽

Strand Transfer ◽

Inflammatory Myositis ◽

Once Daily ◽

Immune Mediated ◽

Show Evidence ◽

Transfer Inhibitor ◽

Integrase Strand Transfer Inhibitor

Here, we describe a five year old girl with congenital HIV who had a six-week onset of rapidly deteriorating mobility and progressive proximal muscle weakness, associated with a raised Creatine Kinase (CK) level of 4330 U/L [25–200 U/L], subsequently diagnosed with an inflammatory myositis. Potential causes were investigated by paediatric neurology and immunology teams. Her viral load had been undetectable over the preceding two years, excluding a primary HIV myositis. While MRI scanning did not show evidence of definite myositis, a muscle biopsy showed evidence of an inflammatory process, comprising a moderate endomysial, perimysial and perivascular mononuclear (CD8 + T cell) infiltrate with increased MHC expression. No particular features of dermatomyositis or immune-mediated necrotising myopathy were identified and there were no features of an inclusion body myositis. Given the absence of active HIV infection, the role of anti-retroviral medications was considered. She had had a recent switch in medication, from twice daily Raltegravir (an Integrase Strand Transfer Inhibitor, INSTI) to once daily Dolutegravir (an INSTI) while continuing on an established daily protocol of Abacavir and Lamivudine (Nucleoside Reverse Transcriptase Inhibitors). Changing the Dolutegravir back to Raltegravir, in combination with continuing Lamivudine and Abacavir for two months made no difference to her weakness or CK levels. Moreover, this drug regimen had been well-tolerated over the preceding 19 month period. Changing the anti-retroviral regime completely to a single drug class (Protease Inhibitors) of Ritonavir and Darunavir, resulted in a dramatic improvement in her symptomatology. Within ten days she regained the ability to stand and walk, with a reduction in her CK from 1700 U/L at time of switch to 403 U/L [25–200]. This case highlights the potential risk of developing inflammatory myositis from anti-retrovirals even 19 months into treatment.

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The Role of In Vivo and Ex Vivo Diagnostic Tools in Severe Delayed Immune-Mediated Adverse Antibiotic Drug Reactions

The Journal of Allergy and Clinical Immunology In Practice ◽

10.1016/j.jaip.2020.12.052 ◽

2021 ◽

Author(s):

Ana Copaescu ◽

Effie Mouhtouris ◽

Sara Vogrin ◽

Fiona James ◽

Kyra Y.L. Chua ◽

...

Keyword(s):

Ex Vivo ◽

Diagnostic Tools ◽

Drug Reactions ◽

Immune Mediated ◽

Antibiotic Drug

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Sugar sweetened beverage consumption is positively associated with Klotho levels at two years of age in LatinX youth

BMC Nutrition ◽

10.1186/s40795-021-00423-5 ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Sofia Villagomez ◽

Dena B. Dubal ◽

Jessica Hawkins ◽

Dan Wang ◽

Janet M. Wojcicki

Keyword(s):

San Francisco ◽

Low Income ◽

Accelerated Aging ◽

Positive Association ◽

Dietary Factors ◽

Sugar Sweetened Beverage ◽

Protein Levels ◽

Sweetened Beverages ◽

Klotho Protein

Abstract Background Klotho is an anti-aging protein mainly expressed in the kidneys with a smaller amount expressed in adipose tissue. Klotho effects include roles in reducing oxidative stress, insulin signaling, adipogenesis and glucose metabolism. Few studies have investigated the role of dietary factors such as sugar sweetened beverages (SSBs) on serum α-klotho levels in young children. Methods Data was collected from 60 low-income Latina pregnant women and their infants in San Francisco from birth until 2 years of life and examined for associations between dietary factors and child secreted α-klotho protein levels at 2 years. Results Mean α-klotho levels were 1782.96 ± 874.56 pg/mL at 2 years of age. Any consumption of SSBs was independently associated with increased α-klotho levels (Beta = 682.79, 95%CI 67.50, 1298.09; p = 0.03). Household income ranging from $25,000 to $50,000 was also correlated to higher levels of α-klotho in children compared with lower income levels (<$25,000) (Beta = 1613.35, 95%CI 527.37, 2699.33; p = 0.005). Conclusions The positive association between SSB intake and α-klotho levels at 2 years may reflect higher phosphate levels consistent with SSB intake. Higher socioeconomic status may be a proxy for reduced stress exposure in children, also associated with higher α-klotho levels. Future studies should evaluate the early impact of exposures to SSBs, stress and accelerated aging in children.

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