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Pearson SA, Mark JD, Bayer J, Hussain A, Ijaz HM, Asif M, Rahim M. Post-inflammatory Hyperpigmentation in an African American Female: An Atypical Presentation and Treatment Dilemma. Cureus 2023; 15:e38142. [PMID: 37252540 PMCID: PMC10224702 DOI: 10.7759/cureus.38142] [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: 09/07/2022] [Accepted: 04/25/2023] [Indexed: 05/31/2023] Open
Abstract
We present the case of a 32-year-old African American female with a known history of primary Sjogren's syndrome, multiple vitamin deficiencies, and prior facial cellulitis who presented with diffuse facial post-inflammatory hyperpigmentation following a motor vehicle accident. Following glucocorticoid treatment, only select hyperpigmented areas associated with inflammation, infection, or trauma improved, which thereby posed a clinical challenge to improve the patient's appearance and condition. Such results may warrant the consideration of adjunctive topical therapies to lighten the remaining areas of hyperpigmentation.
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Affiliation(s)
- Sarah A Pearson
- Internal Medicine, Lincoln Memorial University - DeBusk College of Osteopathic Medicine, Harrogate, USA
| | - Justin D Mark
- Internal Medicine, Dr. Kiran C. Patel College of Allopathic Medicine, Nova Southeastern University, Fort Lauderdale, USA
| | - Jack Bayer
- Internal Medicine, Dr. Kiran C. Patel College of Allopathic Medicine, Nova Southeastern University, Fort Lauderdale, USA
| | - Aaiz Hussain
- Internal Medicine, Dr. Kiran C. Patel College of Allopathic Medicine, Nova Southeastern University, Fort Lauderdale, USA
| | - Hasnan M Ijaz
- Internal Medicine, Hospital Corporation of America (HCA) Florida Westside Hospital, Plantation, USA
| | - Muntaha Asif
- College of Medicine, Era University, Lucknow, IND
| | - Mustafa Rahim
- Internal Medicine, Raleigh General Hospital, Beckley, USA
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2
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Demirtas MS, Erdal H. Evaluation of thiol disulfide balance in adolescents with vitamin B12 deficiency. Ital J Pediatr 2023; 49:3. [PMID: 36611205 PMCID: PMC9824957 DOI: 10.1186/s13052-022-01396-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 12/13/2022] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Vitamin B12 is an important vitamin for metabolism and affects many mechanisms in the body including neuronal migration, DNA synthesis, neurotransmitter synthesis, brain and cognitive development. Increased oxidative stress in the body leads to the damage of the child development, but also plays a crucial role in the pathogenesis of many diseases encountered in the childhood period. Our aim is to investigate whether or not B12 deficiency is associated with dynamic thiol/disulfide homeostasis in adolescent patients. METHODS This is a case-controlled observational study consisting of 45 adolescent patients with vitamin b12 deficiency and a control group consisting of 45 healthy adolescent. Patients between 11 and 18 ages who applied to the outpatient clinic for the first time with one of the complaints of headache were selected due to their decreased school performance, dizziness, and fatigue. Hemogram, vitamin B12, homocysteine levels and oxidative stress parameters such as native and total thiol disulfide levels and ratios of disulfide/native thiol, disulfide/total thiol, and native thiol/total thiol were measured from the patients. RESULTS Vitamin B12 level was found to be significantly lower in vitamin B12 deficiency group (p < 0.001). The serum disulfide level was found to be 27.5 ± 8.38 in the case group and 20.5 ± 8.36 in the control group (p < 0.001). In the multiple linear regression analysis, it was determined that the independent variables of native thiol, homocysteine and disulfide levels effected of vitamin B12 levels (p < 0.001, p < 0.001, p < 0.005 respectively; R2 = 0.62). CONCLUSION The results obtained in terms of the effect of vitamin B12 deficiency on oxidative stress in adolescents are remarkable. The increase in oxidative stress parameters in the patient group may also suggest that oxidative stress plays a vital role in vitamin B12 deficiency in adolescence.
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Affiliation(s)
- Mehmet Semih Demirtas
- grid.411297.80000 0004 0384 345XDepartment of Pediatrics, Aksaray University Training and Research Hospital, Aksaray, Turkey
| | - Huseyin Erdal
- grid.411297.80000 0004 0384 345XDepartment of Medical Genetics, Faculty of Medicine, Aksaray University, Aksaray, Turkey
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3
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Cobalamin Deficiency May Induce Astrosenescence—An In Vitro Study. Cells 2022; 11:cells11213408. [PMID: 36359805 PMCID: PMC9655094 DOI: 10.3390/cells11213408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/19/2022] [Accepted: 10/26/2022] [Indexed: 11/30/2022] Open
Abstract
Cobalamin (vitamin B12) deficiency is one of the major factors causing degenerative changes in the nervous system and, thus, various neurological and psychiatric symptoms. The underlying cellular mechanism of this phenomenon is not yet fully understood. An accumulation of senescent astrocytes has been shown to contribute to a wide range of pathologies of the nervous system, including neurodegenerative disorders. This study aimed to investigate whether cobalamin deficiency triggers astrosenescence. After inducing cobalamin deficiency in normal human astrocytes in vitro, we examined biomarkers of cellular senescence: SA-β-gal, p16INK4A, and p21Waf1/Cip1 and performed cell nuclei measurements. The obtained results may contribute to an increase in the knowledge of the cellular effects of cobalamin deficiency in the context of astrocytes. In addition, the presented data suggest a potential causative agent of astrosenescence that has not been proven to date.
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Brenig C, Mestizo PD, Zelder F. Functionalisation of vitamin B 12 derivatives with a cobalt β-phenyl ligand boosters antimetabolite activity in bacteria. RSC Adv 2022; 12:28553-28559. [PMID: 36320527 PMCID: PMC9541496 DOI: 10.1039/d2ra05748d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022] Open
Abstract
This study describes the syntheses of four singly- and two doubly-modified vitamin B12 derivatives for generating antimetabolites of Lactobacillus delbrueckii (L. delbrueckii). The two most potent antagonists, a Coβ-phenyl-cobalamin-c,8-lactam and a 10-bromo-Coβ-phenylcobalamin combine a c-lactam or 10-bromo modification at the “eastern” site of the corrin ring with an artificial organometallic phenyl group instead of a cyano ligand at the β-site of the cobalt center. These two doubly-modified B12 antagonists (10 nM) inhibit fully B12-dependent (0.1 nM) growth of L. delbrueckii. In contrast to potent 10-bromo-Coβ-phenylcobalamin, single modified 10-bromo-Coβ-cyanocobalamin lacking the artificial organometallic phenyl ligand does not show any inhibitory effect. These results suggest, that the organometallic β-phenyl ligand at the Co center ultimately steers the metabolic effect of the 10-bromo-analogue. This study describes the syntheses of four singly- and two doubly-modified vitamin B12 derivatives for generating antimetabolites of Lactobacillus delbrueckii (L. delbrueckii).![]()
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Affiliation(s)
- Christopher Brenig
- Department of Chemistry, University of ZurichWinterthurerstrasse 190CH 8057 ZurichSwitzerlandhttps://www.felix-zelder.net+41 44 635 6803
| | - Paula Daniela Mestizo
- Department of Chemistry, University of ZurichWinterthurerstrasse 190CH 8057 ZurichSwitzerlandhttps://www.felix-zelder.net+41 44 635 6803
| | - Felix Zelder
- Department of Chemistry, University of ZurichWinterthurerstrasse 190CH 8057 ZurichSwitzerlandhttps://www.felix-zelder.net+41 44 635 6803
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Jangda A, Voloshyna D, Ramesh K, Bseiso A, Shaik TA, Al Barznji S, Usama M, Saleem F, Ghaffari MAZ. Hyperpigmentation as a Primary Symptom of Vitamin B12 Deficiency: A Case Report. Cureus 2022; 14:e29008. [PMID: 36237758 PMCID: PMC9551622 DOI: 10.7759/cureus.29008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2022] [Indexed: 11/08/2022] Open
Abstract
The presentation of vitamin B12 deficiency varies from being asymptomatic to affecting multiple organ systems. In addition, several systemic diseases can be associated with generalized weakness and hyperpigmentation. However, vitamin B12 deficiency rarely presents with hyperpigmentation as an initial symptom. We present a rare case of a 22-year-old college student who presented with hyperpigmentation as the only physical manifestation of early vitamin B12 deficiency. This case underlines the need to rule out vitamin B12 deficiency when clinicians encounter hyperpigmentation as a solo presentation and also emphasizes the significance of early treatment in preventing the irreversible neurological manifestations of vitamin B12 deficiency.
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Kaplan S, Türk A. Effects of vitamin B12 on rat ovary with ischemia-reperfusion injury. Biotech Histochem 2021; 97:284-289. [PMID: 34353191 DOI: 10.1080/10520295.2021.1961863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
We investigated the histopathological and biochemical effects of vitamin B12 on ischemia-reperfusion (I-R) injury using a rat ovarian torsion-detorsion model. We used four groups of female Wistar albino rats. Group 1 (sham group): both ovaries were removed. Group 2 (torsion group): ovarian torsion was established. Group 3 (torsion-detorsion group) perfusion was retored after ischemia for 2 h. Group 4 (torsion-detorsion-vitamin B12 group): after 2 h ovarian torsion, perfusion was re-established and 4 mg/kg vitamin B12 was administered for 2 h. Follicular degeneration, vascular congestion, hemorrhage, edema and infiltration were evaluated histologically. Tissue damage was decreased in group 4 compared to groups 2 and 3. Total antioxidant status TAS), total oxidant status (TOS) and malondialdehyde (MDA) level were measured. The values for TOS and MDA for groups 1 and 4 were similar. We found a significant increase in MDA and TOS levels in group 3 compared to group 2. MDA and TAS levels decreased and TOS levels were increased in group 4 compared to groups 2 and 3. MDA, TAS and TOS values were increased in groups 2 and 3 compared to group 1. We found that vitamin B12 reduced I-R damage in the rat ovary.
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Affiliation(s)
- Selçuk Kaplan
- Department of Gynecology and Obstetrics, Adıyaman Univercity School of Medicine, Adıyaman, Turkey
| | - Ahmet Türk
- Department of Histology and Embryology, Adıyaman Univercity School of Medicine, Adıyaman, Turkey
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7
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Rzepka Z, Rok J, Maszczyk M, Beberok A, Hermanowicz JM, Pawlak D, Gryko D, Wrześniok D. Response of Human Glioblastoma Cells to Vitamin B12 Deficiency: A Study Using the Non-Toxic Cobalamin Antagonist. BIOLOGY 2021; 10:biology10010069. [PMID: 33478021 PMCID: PMC7835758 DOI: 10.3390/biology10010069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/11/2021] [Accepted: 01/15/2021] [Indexed: 12/25/2022]
Abstract
The most important biological function of vitamin B12 is to accomplish DNA synthesis, which is necessary for cell division. Cobalamin deficiency may be especially acute for rapidly dividing cells, such as glioblastoma cells. Therefore, cobalamin antagonists offer a medicinal potential for developing anti-glioma agents. In the present study, we developed an in vitro model of cobalamin deficiency in glioblastoma cells. Long-term treatment of cells with the cobalamin analogue, hydroxycobalamin [c-lactam] (HCCL) was applied to induce an increase of hypocobalaminemia biomarker. Cytometric assays demonstrated that vitamin B12 promoted glioblastoma cells proliferation, whereas the treatment of cells with HCCL caused a dramatic inhibition of cell proliferation and an induction of cell cycle arrest at the G2/M phase. Vitamin B12 counteracted all the observed effects of HCCL. In the in silico study, we characterized the molecular interactions between HCCL and transcobalamin II (TCII). We have demonstrated that HCCL shares similar interactions with TCII as naturally occurring cobalamins and therefore may act as a competitive inhibitor of this key transporter protein. We assessed the impact of HCCL on the mortality or developmental malformations of zebrafish embryos. Collectively, our findings suggest that the use of cobalamin transport antagonists as potential anti-glioma agents would be worth exploring further.
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Affiliation(s)
- Zuzanna Rzepka
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
| | - Jakub Rok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
| | - Mateusz Maszczyk
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
| | - Artur Beberok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
| | - Justyna Magdalena Hermanowicz
- Department of Pharmacodynamics, Medical University of Bialystok, Mickiewicza 2C, 15-222 Bialystok, Poland; (J.M.H.); (D.P.)
| | - Dariusz Pawlak
- Department of Pharmacodynamics, Medical University of Bialystok, Mickiewicza 2C, 15-222 Bialystok, Poland; (J.M.H.); (D.P.)
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland;
| | - Dorota Wrześniok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (M.M.); (A.B.)
- Correspondence: ; Tel.: +48-323-641-050
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Abstract
The recently delineated structure- and reactivity-based concept of antivitamins B12 has begun to bear fruit by the generation, and study, of a range of such B12 -dummies, either vitamin B12 -derived, or transition metal analogues that also represent potential antivitamins B12 or specific B12 -antimetabolites. As reviewed here, this has opened up new research avenues in organometallic B12 -chemistry and bioinorganic coordination chemistry. Exploratory studies with antivitamins B12 have, furthermore, revealed some of their potential, as pharmacologically interesting compounds, for inducing B12 -deficiency in a range of organisms, from hospital resistant bacteria to laboratory mice. The derived capacity of antivitamins B12 to induce functional B12 -deficiency in mammalian cells and organs also suggest their valuable potential as growth inhibitors of cancerous human and animal cells.
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Affiliation(s)
- Bernhard Kräutler
- Institute of Organic Chemistry and Center for Molecular Biosciences (CMBI)University of Innsbruck6020InnsbruckAustria
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9
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10
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Rzepka Z, Maszczyk M, Wrześniok D. Biological function of cobalamin: causes and effects of
hypocobalaminemia at the molecular, cellular, tissue
and organism level. POSTEP HIG MED DOSW 2020. [DOI: 10.5604/01.3001.0014.4741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Cobalamin (vitamin B12) is a complex compound, which is classified as a water-soluble
vitamin. Absorption of cobalamin in the gut and its transport to cells is a unique process,
in which many proteins are involved. The loss of function of these proteins causes serious
cell homeostasis disturbance, which may result in the dysfunction of many tissues and
organs. Vitamin B12, a cofactor of methionine synthase, provides methylation process and
nucleic acid synthesis. Cobalamin is also necessary for methylmalonyl-CoA mutase activity.
The enzyme synthesizes succinyl-CoA, an intermediate in tricarboxylic acid cycle.
Vitamin B12 deficiency is an important and current health problem. It may be caused by
insufficient dietary intake, age, or disease-related malabsorption and genetic defects of
mechanisms involved in the absorption, transport and metabolism of cobalamin. Hypocobalaminemia can also result from long-term pharmacotherapy with medicines:
metformin, proton pump inhibitors (e.g. omeprazole) and H2-receptor antagonists
(e.g. ranitidine).
Significant clinical symptoms of cobalamin deficiency include hematological abnormalities,
mainly megaloblastic anemia, as well as neurological disorders resulting from degeneration
within the nervous system. Early diagnosis and starting treatment with vitamin B12 increase
chances for a complete cure. Therefore, the diagnostically important symptom of hypocobalaminemia
may be skin manifestations, mainly hyperpigmentations, but also premature
graying of hair.
The aim of this review article was to summarize the current state of knowledge on the
biological function of cobalamin, as well as the causes and consequences of its deficiency
at the molecular, cellular, tissue and organism level.
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Affiliation(s)
- Zuzanna Rzepka
- Katedra i Zakład Chemii i Analizy Leków, Wydział Nauk Farmaceutycznych w Sosnowcu, Śląski Uniwersytet Medyczny w Katowicach
| | - Mateusz Maszczyk
- Katedra i Zakład Chemii i Analizy Leków, Wydział Nauk Farmaceutycznych w Sosnowcu, Śląski Uniwersytet Medyczny w Katowicach
| | - Dorota Wrześniok
- Katedra i Zakład Chemii i Analizy Leków, Wydział Nauk Farmaceutycznych w Sosnowcu, Śląski Uniwersytet Medyczny w Katowicach
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Rzepka Z, Rok J, Kowalska J, Banach K, Hermanowicz JM, Beberok A, Sieklucka B, Gryko D, Wrześniok D. Astrogliosis in an Experimental Model of Hypovitaminosis B12: A Cellular Basis of Neurological Disorders due to Cobalamin Deficiency. Cells 2020; 9:cells9102261. [PMID: 33050187 PMCID: PMC7600008 DOI: 10.3390/cells9102261] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 12/17/2022] Open
Abstract
Cobalamin deficiency affects human physiology with sequelae ranging from mild fatigue to severe neuropsychiatric abnormalities. The cellular and molecular aspects of the nervous system disorders associated with hypovitaminosis B12 remain largely unknown. Growing evidence indicates that astrogliosis is an underlying component of a wide range of neuropathologies. Previously, we developed an in vitro model of cobalamin deficiency in normal human astrocytes (NHA) by culturing the cells with c-lactam of hydroxycobalamin (c-lactam OH-Cbl). We revealed a non-apoptotic activation of caspases (3/7, 8, 9) in cobalamin-deficient NHA, which may suggest astrogliosis. The aim of the current study was to experimentally verify this hypothesis. We indicated an increase in the cellular expression of two astrogliosis markers: glial fibrillary acidic protein and vimentin in cobalamin-deficient NHA using Western blot analysis and immunocytochemistry with confocal laser scanning microscopy. In the next step of the study, we revealed c-lactam OH-Cbl as a potential non-toxic vitamin B12 antagonist in an in vivo model using zebrafish embryos. We believe that the presented results will contribute to a better understanding of the cellular mechanism underlying neurologic pathology due to cobalamin deficiency and will serve as a foundation for further studies.
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Affiliation(s)
- Zuzanna Rzepka
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Jakub Rok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Justyna Kowalska
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Klaudia Banach
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Justyna Magdalena Hermanowicz
- Department of Pharmacodynamics, Medical University of Bialystok, Mickiewicza 2C, 15-222 Bialystok, Poland; (J.M.H.); (B.S.)
| | - Artur Beberok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
| | - Beata Sieklucka
- Department of Pharmacodynamics, Medical University of Bialystok, Mickiewicza 2C, 15-222 Bialystok, Poland; (J.M.H.); (B.S.)
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw, Poland;
| | - Dorota Wrześniok
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, Jagiellońska 4, 41-200 Sosnowiec, Poland; (Z.R.); (J.R.); (J.K.); (K.B.); (A.B.)
- Correspondence: ; Tel.: +48-3-2364-1050
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Pramanik S, Roy S, Bhandari S. The quantum dot-FRET-based detection of vitamin B12 at a picomolar level. NANOSCALE ADVANCES 2020; 2:3809-3814. [PMID: 36132751 PMCID: PMC9417707 DOI: 10.1039/d0na00540a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 07/10/2020] [Indexed: 06/16/2023]
Abstract
Herein we report the picomolar level detection of vitamin B12 (VB12) using orange-red emitting ligand-free Mn2+-doped ZnS quantum dots (QDs; λ em = 587 nm) in an aqueous dispersion. Sensing was achieved following the quenching of the luminescence of the Mn2+-doped ZnS QDs with an increasing concentration of VB12. The Stern-Volmer constant was determined to be 5.2 × 1010 M-1. Importantly, the Mn2+-doped ZnS QDs exhibited high sensitivity towards VB12, with a limit of detection as low as 1.15 ± 0.06 pM (in the linear range of 4.9-29.4 pM) and high selectivity in the presence of interfering amino acids, metal ions, and proteins. Notably, a Förster resonance energy transfer (FRET) mechanism was primarily proposed for the observed quenching of luminescence of Mn2+-doped ZnS QDs upon the addition of VB12. The Förster distance (R o) and energy transfer efficiency (E) were calculated to be 2.33 nm and 79.3%, respectively. Moreover, the presented QD-FRET-based detection may bring about new avenues for future biosensing applications.
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Affiliation(s)
- Sabyasachi Pramanik
- Department of Chemistry, National Institute of Technology Sikkim Sikkim-737139 India
| | - Shilaj Roy
- Centre for Nanotechnology, Indian Institute of Technology Guwahati Assam-781039 India
| | - Satyapriya Bhandari
- Physics Discipline, Indian Institute of Technology Gandhinagar Gujrat-382355 India
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Altawil L, Alshihry H, Ahmed H, Shamseldin HE, Alkuraya F. Vitamin B12 deficiency secondary to cobalamin F deficiency simulating dyskeratosis congenita. JAAD Case Rep 2020; 6:882-885. [PMID: 32875039 PMCID: PMC7452181 DOI: 10.1016/j.jdcr.2020.07.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Affiliation(s)
- Lama Altawil
- Department of Dermatology and Dermatologic Surgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Hind Alshihry
- Department of Dermatology and Dermatologic Surgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Hala Ahmed
- Department of Hematology, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Hanan E Shamseldin
- Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.,Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Fowzan Alkuraya
- Department of Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.,Department of Pediatrics, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
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14
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Faico-Filho KS, Martins RS, Santos CL, Poles WA, Mello RBD, Moura-Faico MM. Total melanonychia of 20 nails as a rare manifestation of vitamin B12 deficiency. JAAD Case Rep 2020; 6:372-373. [PMID: 32258326 PMCID: PMC7113602 DOI: 10.1016/j.jdcr.2020.02.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
| | - Renata S Martins
- Department of Medicine, Universidade Ferderal de São Paulo, São Paulo, Brazil
| | - Carolina L Santos
- Department of Medicine, Universidade Ferderal de São Paulo, São Paulo, Brazil
| | - Wagner A Poles
- Department of Medicine, Universidade Ferderal de São Paulo, São Paulo, Brazil
| | - Renan B de Mello
- Division of Dermatology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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15
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Cobalamin Deficiency: Effect on Homeostasis of Cultured Human Astrocytes. Cells 2019; 8:cells8121505. [PMID: 31771278 PMCID: PMC6952958 DOI: 10.3390/cells8121505] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 11/18/2019] [Accepted: 11/21/2019] [Indexed: 01/06/2023] Open
Abstract
Cobalamin deficiency is an important health problem. The major non-hematological symptoms of hypocobalaminemia are nervous system disorders, but the molecular and cellular mechanisms underlying this phenomenon have not yet been fully explained. Increasing scientific evidence is stressing the pivotal role of astrocyte dysfunction in the pathogenesis of a wide range of neurological disorders. In light of the above, the aim of this study was to develop an in vitro model of cobalamin deficiency by optimizing the conditions of astrocyte culture in the presence of vitamin B12 antagonist, and then the model was used for multidirectional analysis of astrocyte homeostasis using image cytometry, immunoenzymatic and colorimetric assays, and fluorescence spectroscopy. Our results indicated that long-term incubation of normal human astrocytes with hydroxycobalamin(c-lactam) causes an increase of extracellular homocysteine level, a reduction of cell proliferation, and an accumulation of cells in the G2/M cell cycle phase. Moreover, we observed dramatic activation of caspases and an increase of catalase activity. Interestingly, we excluded extensive apoptosis and oxidative stress. The study provided significant evidence for astrocyte homeostasis disturbance under hypocobalaminemia, thus indicating an important element of the molecular mechanism of nervous system diseases related to vitamin B12 deficiency.
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van de Lagemaat EE, de Groot LCPGM, van den Heuvel EGHM. Vitamin B 12 in Relation to Oxidative Stress: A Systematic Review. Nutrients 2019; 11:E482. [PMID: 30823595 PMCID: PMC6412369 DOI: 10.3390/nu11020482] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 12/11/2022] Open
Abstract
The triage theory posits that modest micronutrient deficiencies may induce reallocation of nutrients to processes necessary for immediate survival at the expense of long-term health. Neglected processes could in time contribute to the onset of age-related diseases, in which oxidative stress is believed to be a major factor. Vitamin B12 (B12) appears to possess antioxidant properties. This review aims to summarise the potential antioxidant mechanisms of B12 and investigate B12 status in relation to oxidative stress markers. A systematic query-based search of PubMed was performed to identify eligible publications. The potential antioxidant properties of B12 include: (1) direct scavenging of reactive oxygen species (ROS), particularly superoxide; (2) indirect stimulation of ROS scavenging by preservation of glutathione; (3) modulation of cytokine and growth factor production to offer protection from immune response-induced oxidative stress; (4) reduction of homocysteine-induced oxidative stress; and (5) reduction of oxidative stress caused by advanced glycation end products. Some evidence appears to suggest that lower B12 status is related to increased pro-oxidant and decreased antioxidant status, both overall and for subclinically deficient individuals compared to those with normal B12 status. However, there is a lack of randomised controlled trials and prospective studies focusing specifically on the relation between B12 and oxidative stress in humans, resulting in a low strength of evidence. Further work is warranted.
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Affiliation(s)
- Erik E van de Lagemaat
- Division of Human Nutrition and Health, Wageningen University and Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
- FrieslandCampina, Stationsplein 4, 3818 LE Amersfoort, The Netherlands.
| | - Lisette C P G M de Groot
- Division of Human Nutrition and Health, Wageningen University and Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
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Tiwari P, Kaur N, Sharma V, Kang H, Uddin J, Mobin SM. Cannabis sativa-derived carbon dots co-doped with N–S: highly efficient nanosensors for temperature and vitamin B12. NEW J CHEM 2019. [DOI: 10.1039/c9nj04061g] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cannabis sativa-derived carbon dots as efficient nanosensors for temperature and vitamin B12.
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Affiliation(s)
- Pranav Tiwari
- Discipline of Metallurgical Engineering and Material Science
- Indian Institute of Technology Indore
- Indore 453552
- India
| | - Navpreet Kaur
- Discipline of Biosciences and Biomedical Engineering
- Indian Institute of Technology Indore
- Indore 453552
- India
| | - Vinay Sharma
- Discipline of Biosciences and Biomedical Engineering
- Indian Institute of Technology Indore
- Indore 453552
- India
| | - Hyeonggon Kang
- Center for Nanotechnology
- Department of Natural Sciences
- Coppin State University
- Baltimore
- USA
| | - Jamal Uddin
- Center for Nanotechnology
- Department of Natural Sciences
- Coppin State University
- Baltimore
- USA
| | - Shaikh M. Mobin
- Discipline of Metallurgical Engineering and Material Science
- Indian Institute of Technology Indore
- Indore 453552
- India
- Discipline of Biosciences and Biomedical Engineering
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