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Hwang JK, Lipner SR. Blue Nail Discoloration: Literature Review and Diagnostic Algorithms. Am J Clin Dermatol 2023; 24:419-441. [PMID: 36971947 DOI: 10.1007/s40257-023-00768-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/01/2023] [Indexed: 03/29/2023]
Abstract
Blue nail discoloration is a distinctive clinical presentation, and diagnosis is challenging given the broad differential diagnosis. A comprehensive review of the literature describing blue discoloration of one or multiple nails was performed using the PubMed, Embase, Scopus, and Web of Science databases. A total of 245 publications were included and grouped based on involvement of a single nail (monodactylic) or multiple nails (polydactylic). Monodactylic blue discoloration was associated with tumors or benign nevi, most commonly glomus tumors, followed by blue nevi and less commonly melanomas. Polydactylic blue discoloration was frequently associated with medications (such as minocycline, zidovudine, and hydroxyurea), toxic and exogenous exposures (such as silver), and other medical conditions (such as HIV/AIDS and systemic lupus erythematous). Patients presenting with blue nail discoloration warrant a thorough history, physical examination, and workup to rule out malignancy, systemic disease, or toxic exposure. We present diagnostic algorithms for monodactylic and polydactylic blue nail discoloration to guide workup and treatment plans.
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Chow N, Fain K, Truitt J, Stetson C. Systemic argyria with severe anemia (hemoglobin 2.4 g/L). Proc AMIA Symp 2022; 35:382-384. [DOI: 10.1080/08998280.2021.2022369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Nathan Chow
- School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Kristen Fain
- School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Jay Truitt
- Department of Dermatology, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Cloyce Stetson
- Department of Dermatology, Texas Tech University Health Sciences Center, Lubbock, Texas
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Exogenous pigmentation by silver nitrate: Dermatological and toxicological aspects, case report. ACTA ACUST UNITED AC 2021; 41:234-239. [PMID: 34214264 PMCID: PMC8390001 DOI: 10.7705/biomedica.5876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Indexed: 11/28/2022]
Abstract
La pigmentación exógena por nitrato de plata es una enfermedad poco frecuente, cuyas manifestaciones clínicas pueden aparecer años después del contacto, lo que en ocasiones dificulta su diagnóstico. Se caracteriza por la presencia de máculas o placas azul-grisáceas en la piel o las mucosas de la zona de contacto que, en ocasiones, son muy similares a las lesiones melanocíticas y al melanoma, sus principales diagnósticos diferenciales. Se reporta el caso de un paciente de Medellín, Colombia, con antecedentes familiares de melanoma y presencia de estas lesiones en todo el cuerpo.
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Clinical and Forensic Aspects of the Different Subtypes of Argyria. J Clin Med 2021; 10:jcm10102086. [PMID: 34068024 PMCID: PMC8152497 DOI: 10.3390/jcm10102086] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/29/2021] [Accepted: 05/11/2021] [Indexed: 11/16/2022] Open
Abstract
Argyria encompasses the different cosmetic alterations that can develop if enough silver particles deposit in a specific tissue, typically in the skin, ranging from localized dark-blue macules to a generalized slate-gray/bluish tinge following systemic absorption. This work aims to fully review the state of the art regarding pathophysiology, diagnosis, treatment, and relevant clinical and forensic features of argyria. Argyria has been diagnosed in a wide range of ages, both sexes and varied ethnicities, with no known individual predisposing factors. Ultraviolet radiation with subsequence increases of melanin production aggravates the discoloration due to a reduction in the silver deposits. Physical examination and silver exposure in the anamnesis can be highly suggestive of the diagnosis, but a histopathological analysis with Energy-Dispersive X-ray Spectroscopy is required to unequivocally determine the discoloration etiology. Safe and effective treatment has only been accomplished with laser techniques, though only a few cases have been reported and with limited follow-up time. In conclusion, argyria typically has an occupational or iatrogenic etiology. It should be suspected when a patient presents with typical skin or eye lesions. A seemingly viable treatment modality, with laser technology, is finally within the horizon.
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Anuj SA, Gajera HP, Hirpara DG, Golakiya BA. The impact of bacterial size on their survival in the presence of cationic particles of nano-silver. J Trace Elem Med Biol 2020; 61:126517. [PMID: 32447152 DOI: 10.1016/j.jtemb.2020.126517] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 03/19/2020] [Accepted: 03/30/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND Microbial surface area is one of the battlegrounds for invading microbes and host defense. Hence, infectious diseases caused by drug resistant microbes with large surface area are more difficult to treat than small size microbes. Nanobiology offers opportunities to re-explore the biological properties of conventional drugs at molecular level to combat these microbes. The purpose of the present study was to examine size depended susceptibility of Gram-positive bacteria towards nano-silver particles. METHODS This study investigated the growth, surface charge, and morphology of emerging B. megaterium MTCC 7192 and re-emerging S. aureus MTCC 3160 cells in order to observe the susceptibility of these bacteria towards cationic nano-silver particles. Nano-silver particles were applied into wells formed on the Nutrient agar plates containing 108 CFU/mL of the bacteria. Surface potential of normal and treated cells was measured by Microtrac and the effects of nano-silver particles on bacterial cells were assessed by Scanning Electron Microscopy (SEM). RESULTS In this work, synthesized nano-silver particles were found to be more effective against B. megaterium MTCC 7192 than S. aureus MTCC 3160. For B. megaterium MTCC 7192, a 0.30 fold increase in inhibition zone was observed after the addition of nano-silver particles in the wells. From our studies, it is reasonable to state that alternation of zeta potential may affect the cell morphology, which was further confirmed by SEM. CONCLUSION The present study concluded that nano-silver particles appears to interact with a larger surface area more effectively.
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Affiliation(s)
- Samir A Anuj
- School of Science, RK University, Rajkot, 360020, Gujarat, India.
| | - Harsukh P Gajera
- Department of Biotechnology, College of Agriculture, Junagadh Agricultural University, Junagadh, 362001, Gujarat, India
| | - Darshna G Hirpara
- Department of Biotechnology, College of Agriculture, Junagadh Agricultural University, Junagadh, 362001, Gujarat, India
| | - Baljibhai A Golakiya
- Department of Biotechnology, College of Agriculture, Junagadh Agricultural University, Junagadh, 362001, Gujarat, India
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Laloux L, Kastrati D, Cambier S, Gutleb AC, Schneider YJ. The Food Matrix and the Gastrointestinal Fluids Alter the Features of Silver Nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1907687. [PMID: 32187880 DOI: 10.1002/smll.201907687] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/19/2020] [Accepted: 02/24/2020] [Indexed: 06/10/2023]
Abstract
Silver nanoparticles (AgNPs) are used in the agri-food sector, which can lead to their ingestion. Their interaction with food and their passage through the gastrointestinal tract can alter their properties and influence their fate upon ingestion. Therefore, this study aims at developing an in vitro method to follow the fate of AgNPs in the gastrointestinal tract. After incorporation of AgNPs into a standardized food matrix, a precolonic digestion is simulated and AgNPs are characterized by different techniques. The presence of food influences the AgNPs properties by forming a corona around nanoparticles. Even if the salivary step does not impact significantly the AgNPs, the pH decrease and the digestive enzymes induce the agglomeration of AgNPs during the gastric phase, while the addition of intestinal fluids disintegrates these clusters. AgNPs can thus reach the intestinal cells under nanometric form, although the presence of food and gastrointestinal fluids modifies their properties compared to pristine AgNPs. They can form a corona around the nanoparticles and act as colloidal stabilizer, which can impact the interaction of AgNPs with intestinal epithelium. This study demonstrates the importance of taking the fate of AgNPs in the gastrointestinal tract into account to perform an accurate risk assessment of nanomaterials.
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Affiliation(s)
- Laurie Laloux
- Louvain Institute of Biomolecular Science and Technology (LIBST), Université catholique de Louvain (UCLouvain), Place Croix-du-Sud, 4-5 bte L7.07.03, Louvain-la-Neuve, B-1348, Belgium
| | - Donika Kastrati
- Louvain Institute of Biomolecular Science and Technology (LIBST), Université catholique de Louvain (UCLouvain), Place Croix-du-Sud, 4-5 bte L7.07.03, Louvain-la-Neuve, B-1348, Belgium
| | - Sébastien Cambier
- Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), Rue du Brill, 41, Belvaux, L-4422, Luxembourg
| | - Arno C Gutleb
- Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), Rue du Brill, 41, Belvaux, L-4422, Luxembourg
| | - Yves-Jacques Schneider
- Louvain Institute of Biomolecular Science and Technology (LIBST), Université catholique de Louvain (UCLouvain), Place Croix-du-Sud, 4-5 bte L7.07.03, Louvain-la-Neuve, B-1348, Belgium
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García-Galaviz R, Martínez-Benítez B, Domínguez-Cherit J. Azure lunulae. Int J Dermatol 2020; 59:e110-e111. [PMID: 31970751 DOI: 10.1111/ijd.14786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 12/17/2019] [Accepted: 12/23/2019] [Indexed: 11/29/2022]
Affiliation(s)
- Ramón García-Galaviz
- Dermatology Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Braulio Martínez-Benítez
- Dermatology Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Judith Domínguez-Cherit
- Dermatology Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
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Anuj SA, Gajera HP, Hirpara DG, Golakiya BA. Bacterial membrane destabilization with cationic particles of nano-silver to combat efflux-mediated antibiotic resistance in Gram-negative bacteria. Life Sci 2019; 230:178-187. [PMID: 31152810 DOI: 10.1016/j.lfs.2019.05.072] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/22/2019] [Accepted: 05/27/2019] [Indexed: 10/26/2022]
Abstract
AIMS With the purpose of exploring combinatorial options that could enhance the bactericide efficacy of linezolid against Gram-negative bacteria, we assessed the extent of combination of nano-silver and linezolid. MAIN METHODS In this study, we selected Escherichia coli MTCC 443 as a model to study the combinatorial effect of nano-silver and linezolid to combat efflux-mediated resistance in Gram-negative bacteria. The acting mechanism of nano-silver on E. coli MTCC 443 was investigated by evaluating interaction of nano-silver with bacterial membrane as well as bacterial surface charge, morphology, intracellular leakages and biological activities of membrane bound respiratory chain dehydrogenase and deoxyribonucleic acids (DNA) of the cells following treatment with nano-silver. KEY FINDINGS The alternation of zeta potential due to the interaction of nano-silver towards bacterial membrane proteins was correlated with enhancement of membrane permeability, which allows the penetration of linezolid into the cells. In addition, the binding affinity of nano-silver towards bacterial membrane depressed biological activities of membrane bound respiratory chain dehydrogenases and DNA integrity. SIGNIFICANCE Our findings suggested that nano-silver could not only obstruct the activities of efflux pumps, but also altered membrane integrity at the same time and thus increased the cytoplasmic concentration of the linezolid to the effective level.
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Affiliation(s)
- Samir A Anuj
- School of Science, RK University, Rajkot, Gujarat, India.
| | - Harsukh P Gajera
- Department of Biotechnology, College of Agriculture, Junagadh Agricultural University, Junagadh, Gujarat, India
| | - Darshna G Hirpara
- Department of Biotechnology, College of Agriculture, Junagadh Agricultural University, Junagadh, Gujarat, India
| | - Baljibhai A Golakiya
- Department of Biotechnology, College of Agriculture, Junagadh Agricultural University, Junagadh, Gujarat, India
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Naddaf E, Dyck PJ, Jannetto PJ, Murray DL, Dyck PJB. Peripheral neuropathy associated with silver toxicity. Neurology 2019; 92:481-483. [DOI: 10.1212/wnl.0000000000007048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 11/27/2018] [Indexed: 11/15/2022] Open
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Mendonça MCP, Ferreira LB, Rizoli C, Batista ÂG, Maróstica Júnior MR, da Silva EDN, Cadore S, Durán N, Cruz-Höfling MAD, de Jesus MB. N-Acetylcysteine reverses silver nanoparticle intoxication in rats. Nanotoxicology 2018; 13:326-338. [PMID: 30477371 DOI: 10.1080/17435390.2018.1544302] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The increasing use of silver nanoparticles (AgNPs) in consumer products raises the risk of human toxicity. Currently, there are no therapeutic options or established treatment protocols in cases of AgNPs intoxication. We demonstrated previously that thiol antioxidants compounds can reverse the cytotoxicity induced by AgNPs in Huh-7 hepatocarcinoma cells. Here, we investigated the use of N-acetylcysteine (NAC) against the systemic toxic effects of AgNPs (79.3 nm) in rats. Biochemical, histopathological, hematological, and oxidative parameters showed that a single intravenous injection of AgNPs (5 mg/kg b.w.) induced deleterious effects such as hepatotoxicity, potentially as a result of AgNPs accumulation in the liver. Treatment with a single intraperitoneal injection of NAC (1 g/kg b.w.) one hour after AgNPs exposure significantly attenuated all toxic effects evaluated and altered the bioaccumulation and release patterns of AgNPs in rats. The findings show that NAC may be a promising candidate for clinical management of AgNPs intoxication.
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Affiliation(s)
| | - Luiz Bandeira Ferreira
- a Department of Biochemistry and Tissue Biology, Institute of Biology , University of Campinas , São Paulo , Brazil
| | - Cintia Rizoli
- a Department of Biochemistry and Tissue Biology, Institute of Biology , University of Campinas , São Paulo , Brazil
| | | | | | | | - Solange Cadore
- c Institute of Chemistry , University of Campinas , São Paulo , Brazil
| | - Nelson Durán
- c Institute of Chemistry , University of Campinas , São Paulo , Brazil.,d Nanomedine Units , Federal University of ABC (UFABC) , São Paulo , Brazil
| | - Maria Alice da Cruz-Höfling
- a Department of Biochemistry and Tissue Biology, Institute of Biology , University of Campinas , São Paulo , Brazil
| | - Marcelo Bispo de Jesus
- a Department of Biochemistry and Tissue Biology, Institute of Biology , University of Campinas , São Paulo , Brazil
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