1
|
Zhang W, He Y, Kang X, Wang C, Chen F, Kang Z, Yang S, Zhang R, Peng Y, Li W. Association between dietary minerals and glioma: A case-control study based on Chinese population. Front Nutr 2023; 10:1118997. [PMID: 36937365 PMCID: PMC10018027 DOI: 10.3389/fnut.2023.1118997] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 02/13/2023] [Indexed: 03/06/2023] Open
Abstract
Background As one of the essential nutrients for the human body, minerals participate in various physiological activities of the body and are closely related to many cancers. However, the population study on glioma is not sufficient. Objective The purpose of this study was to evaluate the relationship between five dietary minerals and glioma. Methods A total of 506 adult patients with glioma and 506 healthy controls were matched 1:1 according to age (±5 years) and sex. The food intake of the subjects in the past year was collected through the food frequency questionnaire, and the intakes of calcium, magnesium, iron, zinc, and copper in the diet were calculated. The logistic regression model was used to estimate the odds ratio (OR) and 95% confidence interval (95% CI) for dietary minerals to gliomas. Results After adjusting for confounders, higher intakes of calcium (OR = 0.65, 95% CI: 0.57-0.74), magnesium (OR = 0.18, 95% CI: 0.11-0.29), iron (OR = 0.04, 95% CI: 0.02-0.11), zinc (OR = 0.62, 95% CI: 0.54-0.73), and copper (OR = 0.22, 95% CI: 0.13-0.39) were associated with a significantly decreased risk of glioma. Similar results were observed in gliomas of different pathological types and pathological grades. The restriction cubic spline function suggested significant linear dose-response relationships between intakes of five minerals and the risk of glioma. When the dietary minerals exceeded a particular intake, the risk of glioma stabilized. Conclusion Our study suggests that higher dietary intakes of calcium, magnesium, iron, zinc, and copper are associated with a decreased risk of glioma. However, the results of this study require further exploration of potential mechanisms in the future better to elucidate the effects of mineral intake on gliomas.
Collapse
|
2
|
Lv C, Kang W, Liu S, Yang P, Nishina Y, Ge S, Bianco A, Ma B. Growth of ZIF-8 Nanoparticles In Situ on Graphene Oxide Nanosheets: A Multifunctional Nanoplatform for Combined Ion-Interference and Photothermal Therapy. ACS NANO 2022; 16:11428-11443. [PMID: 35816172 DOI: 10.1021/acsnano.2c05532] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The regulation of intracellular ions' overload to interrupt normal bioprocesses and cause cell death has been developed as an efficient strategy (named as ion-interference therapy/IIT) to treat cancer. In this study, we design a multifunctional nanoplatform (called BSArGO@ZIF-8 NSs) by in situ growth of metal organic framework nanoparticles (ZIF-8 NPs) onto the graphene oxide (GO) surface, subsequently reduced by ascorbic acid and modified by bovine serum albumin. This nanocomplex causes the intracellular overload of Zn2+, an increase of reactive oxygen species (ROS), and exerts a broad-spectrum lethality to different kinds of cancer cells. BSArGO@ZIF-8 NSs can promote cell apoptosis by initiating bim (a pro-apoptotic protein)-mediated mitochondrial apoptotic events, up-regulating PUMA/NOXA expression, and down-regulating the level of Bid/p53AIP1. Meanwhile, Zn2+ excess triggers cellular dysfunction and mitochondria damage by activating the autophagy signaling pathways and disturbing the intracellular environmental homeostasis. Combined with the photothermal effect of reduced GO (rGO), BSArGO@ZIF-8 NSs mediated ion-interference and photothermal combined therapy leads to effective apoptosis and inhibits cell proliferation and angiogenesis, bringing a higher efficacy in tumor suppression in vivo. This designed Zn-based multifunctional nanoplatform will allow promoting further the development of IIT and the corresponding combined cancer therapy strategy.
Collapse
Affiliation(s)
- Chunxu Lv
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Wenyan Kang
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Shuo Liu
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Pishan Yang
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Yuta Nishina
- Graduate School of Natural Science and Technology, Okayama University, Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
- Research Core for Interdisciplinary Sciences, Okayama University, Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
| | - Shaohua Ge
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
| | - Alberto Bianco
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR3572, University of Strasbourg, ISIS, Strasbourg, 67000, France
| | - Baojin Ma
- Department of Periodontology & Tissue Engineering and Regeneration, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong 250012, China
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR3572, University of Strasbourg, ISIS, Strasbourg, 67000, France
| |
Collapse
|
3
|
Wang H, Liu B, Yin X, Guo L, Jiang W, Bi H, Guo D. Excessive zinc chloride induces murine photoreceptor cell death via reactive oxygen species and mitochondrial signaling pathway. J Inorg Biochem 2018; 187:25-32. [DOI: 10.1016/j.jinorgbio.2018.07.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 07/02/2018] [Accepted: 07/17/2018] [Indexed: 01/04/2023]
|
4
|
Shukla A, Trivedi SP. An in vitro analysis of the rat C6 glioma cells to elucidate the linear alkylbenzene sulfonate induced oxidative stress and consequent G2/M phase cell cycle arrest and cellular apoptosis. CHEMOSPHERE 2018; 205:443-451. [PMID: 29705635 DOI: 10.1016/j.chemosphere.2018.04.127] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 04/13/2018] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
Linear alkylbenzene Sulphonate (LAS) is the anionic surfactant component of globally consumed detergents. Exposure of sub-inhibitory fractions viz., 1/10th (T1), 1/5th (T2), and 1/2.5th (T3) of IC50 for 48 h, of LAS (5 μM, 10 μM, and 20 μM, respectively) to viable C6 glioma cells of rat, besides imparting morphological alterations leads to gross cytotoxicity. Expression of the damaged DNA coupled with cleaved PARP (p < 0.05; p < 0.01 and p < 0.001) were recorded for T1, T2 and T3, respectively. Subsequently, the cell cycle at G2/M check point was significantly arrested (p < 0.05 for T1 and T2; p < 0.01 for T3). The flow cytometric analysis reveals the initiation of apoptosis in C6 cells as is evident by a significant increase (p < 0.01 for T1, p < 0.001 for T2, and T3) in the intake of annexin-V, the calcium dependent apoptotic phospholipid binding protein. Moreover, significantly increased reactive oxygen species (ROS) (p < 0.05; p < 0.01 and p < 0.001) after 6 h of exposure for all the three sets, registered a declining trend (P < 0.001) when T3 cells were co-treated with N-acetyl cysteine (NAC). Furthermore, the significant attenuation (p < 0.01) of expression of the cleaved PARP and a consequent decrease (p < 0.05) in the cell cycle arrest at G2/M phase after scavenging ROS induced oxidative stress by treating C6 cells with NAC clearly evinces that LAS induced apoptosis is mediated by intracellular ROS. Thus, these findings provide a tangible basis for further investigations including in vivo studies, to unravel the molecular mechanism involved in ROS mediated and LAS induced cytotoxic manifestations.
Collapse
Affiliation(s)
- Anubha Shukla
- Environmental Toxicology & Bioremediation Laboratory, Department of Zoology, University of Lucknow, Lucknow, 226007, India
| | - Sunil P Trivedi
- Environmental Toxicology & Bioremediation Laboratory, Department of Zoology, University of Lucknow, Lucknow, 226007, India.
| |
Collapse
|
5
|
Rudolf E, Červinka M. Cytoskeletal Changes in Non-Apoptotic Cell Death. ACTA MEDICA (HRADEC KRÁLOVÉ) 2018. [DOI: 10.14712/18059694.2017.124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Dynamic morphology and cytoskeletal changes in Hep-2 cells exhibiting features of non-apoptotic cell death after treatment with zinc were studied using immunofluorescence microscopy and spectrofluorimetry. Among early morphological changes in treated cells was development of vacuolization, surface blebbing, relatively rapid cell detachment from substratum, cell shrinkage and, in some cases, appearance of membrane protrusions. Staining of microfilaments revealed rapid rearrangement and subsequent loss of F-actin accompanied by changes in the amount and localization of G-actin. The use of specific kinase and caspase inhibitors did not prevent surface blebbing as well as other morphological features in dying cells. Dying cells were only weakly positive for phosphatidyl serine and showed only a transient activation of caspase-9 with no signs of activation of caspase-3. These results suggest the existence of nonapoptotic cell death showing morphological features of both apoptosis and necrosis but, biochemically, resembling some other type of cell death.
Collapse
|
6
|
Bonafini C, Marzotto M, Bellavite P. In vitro effects of Zinc in soluble and homeopathic formulations on macrophages and astrocytes. HOMEOPATHY 2017; 106:103-113. [DOI: 10.1016/j.homp.2017.03.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 02/27/2017] [Accepted: 03/08/2017] [Indexed: 12/13/2022]
Abstract
Zinc is an important metal in body homeostasis. Zinc in soluble form (Zn2+) and homeopathic Zincum metallicum were tested in macrophages and astrocytes in order to investigate its potential toxic or therapeutic effects. We evaluated cell viability (WST assay), cytokine production such as tumour necrosis factor alpha (TNF-α) and interleukin 10 (IL-10) by enzyme-linked immunosorbent assay (ELISA) and nitric oxide release by Griess reaction. The effect of zinc-depletion and high zinc pre-treatments on the cell adaptation capability was also investigated. In THP-1 macrophage cell line and in human primary macrophages, Zn2+ at sub-toxic doses (30 μM) caused stimulation of TNF-α and IL-10 with different dynamics reaching the maximum peak at the zinc concentration 100 μM, before the cell death. Highest doses (300 μM) impaired dramatically cell vitality. Similar effects on cell viability were obtained also in C6 astrocytes, where Zn2+ slightly increased the nitric oxide release only in cells activated by one of the pro-inflammatory stimuli used in our cellular model (interferon gamma plus TNF-α). Zinc depletion markedly reduced IL-10 production and cell viability. Zincum metallicum did not cause toxicity in any cell type and showed some small stimulation in WST assay that was statistically significant in a few experimental conditions.
Collapse
|
7
|
|
8
|
|
9
|
Hsieh H, Amlal H, Genter MB. Evaluation of the toxicity of zinc in the rat olfactory neuronal cell line, Odora. Hum Exp Toxicol 2014; 34:308-14. [PMID: 24980442 DOI: 10.1177/0960327114538985] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Zinc (Zn) has long been touted as a panacea for common cold. Recently, there has been some controversy over whether an intranasal (IN) zinc gluconate gel, purported to fight colds, causes anosmia, or loss of the sense of smell, in humans. Previous evidence has shown that IN zinc sulfate (ZnSO4) solutions can cause anosmia in humans as well as significant damage to the olfactory epithelium in rodents. Using an in vitro olfactory neuron model (the rat Odora cell line), we tested the hypothesis that Zn toxicity was caused by inhibition of the hydrogen voltage-gated channel 1(HVCN1), leading to acidosis and apoptotic cell death. Following studies to characterize the toxicity of zinc gluconate and ZnSO4, Odora cells were grown on coverslips and loaded with 2',7'-bis-(2-carboxyethyl)-5-(and-6)-carboxyfluorescein acetoxymethyl ester to measure intracellular pH in the presence and absence of Zn salts. While we found that HVCN1 is not functional in Odora cells, we found that olfactory neurons in vitro maintain their intracellular pH through a sodium/proton exchanger, specifically the sodium proton antiporter 1. ZnSO4, at nontoxic levels, had no impact on intracellular pH after acute exposure or after 24 h of incubation with the cells. In conclusion, Zn toxicity is not mediated through an acidification of intracellular pH in olfactory neurons in vitro.
Collapse
Affiliation(s)
- H Hsieh
- Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - H Amlal
- Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - M B Genter
- Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| |
Collapse
|
10
|
Smidt K, Rungby J. ZnT3: a zinc transporter active in several organs. Biometals 2011; 25:1-8. [DOI: 10.1007/s10534-011-9490-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Accepted: 08/17/2011] [Indexed: 12/30/2022]
|
11
|
Kim BJ. Transient receptor potential melastatin type 7 channels are involved in zinc-induced apoptosis in gastric cancer. Anim Cells Syst (Seoul) 2011. [DOI: 10.1080/19768354.2011.577558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
12
|
Krug HF, Wick P. Nanotoxicology: An Interdisciplinary Challenge. Angew Chem Int Ed Engl 2011; 50:1260-78. [DOI: 10.1002/anie.201001037] [Citation(s) in RCA: 417] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2010] [Revised: 09/10/2010] [Indexed: 11/11/2022]
|
13
|
Plum LM, Rink L, Haase H. The essential toxin: impact of zinc on human health. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2010; 7:1342-65. [PMID: 20617034 PMCID: PMC2872358 DOI: 10.3390/ijerph7041342] [Citation(s) in RCA: 715] [Impact Index Per Article: 51.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 03/08/2010] [Accepted: 03/10/2010] [Indexed: 12/13/2022]
Abstract
Compared to several other metal ions with similar chemical properties, zinc is relatively harmless. Only exposure to high doses has toxic effects, making acute zinc intoxication a rare event. In addition to acute intoxication, long-term, high-dose zinc supplementation interferes with the uptake of copper. Hence, many of its toxic effects are in fact due to copper deficiency. While systemic homeostasis and efficient regulatory mechanisms on the cellular level generally prevent the uptake of cytotoxic doses of exogenous zinc, endogenous zinc plays a significant role in cytotoxic events in single cells. Here, zinc influences apoptosis by acting on several molecular regulators of programmed cell death, including caspases and proteins from the Bcl and Bax families. One organ where zinc is prominently involved in cell death is the brain, and cytotoxicity in consequence of ischemia or trauma involves the accumulation of free zinc. Rather than being a toxic metal ion, zinc is an essential trace element. Whereas intoxication by excessive exposure is rare, zinc deficiency is widespread and has a detrimental impact on growth, neuronal development, and immunity, and in severe cases its consequences are lethal. Zinc deficiency caused by malnutrition and foods with low bioavailability, aging, certain diseases, or deregulated homeostasis is a far more common risk to human health than intoxication.
Collapse
Affiliation(s)
- Laura M Plum
- Institute of Immunology, Medical Faculty, RWTH Aachen University, Pauwelstrasse 30, 52074 Aachen, Germany.
| | | | | |
Collapse
|
14
|
Rico D, Martín-González A, Díaz S, de Lucas P, Gutiérrez JC. Heavy metals generate reactive oxygen species in terrestrial and aquatic ciliated protozoa. Comp Biochem Physiol C Toxicol Pharmacol 2009; 149:90-6. [PMID: 18725323 DOI: 10.1016/j.cbpc.2008.07.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2008] [Revised: 07/21/2008] [Accepted: 07/21/2008] [Indexed: 10/21/2022]
Abstract
Reactive oxygen species (ROS) induction by exposure to heavy metals (Cd, Cu or Zn) in diverse free-living ciliated protozoa (Tetrahymena sp. and three strains of Colpoda steinii, isolated from freshwater and soils with different level of metal pollution) has been evaluated. Using specific fluorophores, such as 2',7'-dichlorofluorescein diacetate, hydroethidine and dihydrorhodamine 123, and a fluorescence microscope with the program MetaMorph Imaging System 4.0, we have analyzed both the average fluorescence emission and the heterogeneous distribution of fluorescence in control and treated cells. This is the first time that these fluorophores are used to detect ROS production in ciliated protozoa. All metals generate ROS, mainly superoxide and peroxides, showing a remarkable inter- and intra-specific variations. Likewise, resistance against each metal was also very diverse. Cu and specially Cd, the most toxic heavy metal for these ciliates, are the best oxidative stress inducers. However, a correlation between fluorescence emission intensity and cellular metal sensitivity for each strain cannot be established. Results are discussed and compared with similar findings previously published in other unicellular and pluricellular organisms.
Collapse
Affiliation(s)
- Daniel Rico
- Departamento Microbiología-III, Facultad de Biología, Universidad Complutense (UCM), Madrid, Spain
| | | | | | | | | |
Collapse
|
15
|
Kiedaisch V, Akel A, Niemoeller OM, Wieder T, Lang F. Zinc-induced suicidal erythrocyte death. Am J Clin Nutr 2008; 87:1530-4. [PMID: 18469280 DOI: 10.1093/ajcn/87.5.1530] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Zn(2+) stimulates secretory sphingomyelinase, which in turn produces ceramide, an important trigger of suicidal erythrocyte death or eryptosis. Eryptosis is characterized by exposure of phosphatidylserine (PS) at the erythrocyte surface and by cell shrinkage. As macrophages are equipped with PS receptors, they bind, engulf, and degrade PS-exposing cells. OBJECTIVE We examined whether Zn(2+) stimulates ceramide formation and PS exposure of erythrocytes and thus may be able to trigger suicidal erythrocyte death. DESIGN In erythrocytes from healthy volunteers, PS exposure (Annexin V binding), cell volume (forward scatter), cytosolic Ca(2+) activity (Fluo3 fluorescence), and ceramide formation (anticeramide antibody) were determined by fluorescence-assisted cell sorting. RESULTS Exposure to Zn(2+) (> or = 25 micromol/L Zn(2+)) significantly increased annexin binding. The effect was paralleled by increase of cytosolic Ca(2+) activity (> or = 25 micromol/L Zn(2+)) and by ceramide formation (> or = 10 micromol/L Zn(2+)). Glucose depletion (24 h) similarly increased PS exposure, an effect significantly enhanced in the presence of Zn(2+) (> or = 10 micromol/L Zn(2+)). CONCLUSION Zn(2+) triggers suicidal erythrocyte death, an effect partially due to ceramide formation and an increase of cytosolic Ca(2+) activity.
Collapse
|
16
|
Rehman A, Shakoori FR, Shakoori AR. Uptake of heavy metals by Stylonychia mytilus and its possible use in decontamination of industrial wastewater. World J Microbiol Biotechnol 2007. [DOI: 10.1007/s11274-007-9436-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
17
|
Metz CHD, Schröder AK, Overbeck S, Kahmann L, Plümäkers B, Rink L. T-helper type 1 cytokine release is enhanced by in vitro zinc supplementation due to increased natural killer cells. Nutrition 2007; 23:157-63. [PMID: 17150331 DOI: 10.1016/j.nut.2006.10.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2006] [Revised: 07/07/2006] [Accepted: 10/24/2006] [Indexed: 11/16/2022]
Abstract
OBJECTIVE We examined the influence of zinc on T-helper type 1 (Th1)/T-helper type 2 (Th2) balance in human lymphocytes. METHODS Human peripheral blood mononuclear cells or diluted whole blood were cultured for 8 d in the presence of zinc (30 or 60 microM) or 1 microM of N, N, N', N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) (a zinc-specific chelator). Phytohemagglutinin-induced cytokine release was measured by enzyme-linked immunosorbent assay, and expression of CD56/CD69, CCR4/CD3, and CCR5/CD3 and intracellular labile zinc were detected by flow cytometry. RESULTS We found that our in vitro supplementation resulted in an increase of intracellular labile zinc comparable to that of a 7-wk administration of 10 mg of zinc per day in vivo. Zinc triggered interferon-gamma release and impaired interleukin-10 release. Phenotypically, a Th2/Th1 shift could not be confirmed after detecting the Th1-specific chemokine receptor CCR5 or CCR4 for Th2 cells. Surprisingly, we detected a larger amount of CD56+ cells after zinc stimulation, leading us to the conclusion that the amount of interferon-gamma release after zinc supplementation might be attributed to the upregulation of natural killer cells after in vitro zinc supplementation rather than to a Th2/Th1 shift. CONCLUSION We suggest that a nutritional intake of 10 mg of zinc increases the quantity of interferon-gamma-producing natural killer cells and strengthens the immune system against neoplasms and viral infections.
Collapse
Affiliation(s)
- Claudia H D Metz
- Institute of Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | | | | | | | | | | |
Collapse
|
18
|
Collin-Hansen C, Andersen RA, Steinnes E. Damage to DNA and lipids in Boletus edulis exposed to heavy metals. ACTA ACUST UNITED AC 2005; 109:1386-96. [PMID: 16353638 DOI: 10.1017/s0953756205004016] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This study investigates the potential of emissions from a zinc smelter to induce oxidative damage to DNA and lipids in Boletus edulis, the king bolete. Concentrations of cadmium, zinc, copper, and mercury were determined in 16 fruit bodies collected near the smelter (exposed group), as well as in 15 reference samples. Frequency of apurinic/apyrimidinic (AP) sites in DNA (a pre-mutagenic DNA base modification) and concentration of lipid hydroperoxides were chosen as damage parameters. Concentrations of the four metals, as well as oxidative damage to DNA and lipids were significantly elevated in the exposed group (Mann-Whitney, P<0.001). Both damage parameters correlated positively with concentrations of cadmium, zinc or copper in fruiting bodies (Spearman's P<0.01). Frequency of AP sites correlated significantly with mercury in the fruit bodies (P<0.05), whereas the association between lipid hydroperoxides and mercury was insignificant. Frequency of AP sites correlated positively with concentration of lipid hydroperoxides (P<0.001). Negative trends for the associations between concentrations of metals and AP sites or lipid hydroperoxides in the reference group (significant only for mercury and lipid hydroperoxides; P<0.05) suggest that in B. edulis low concentrations of mercury, possibly also of other of the metals determined in the present study, may induce dose-response relationships of a hormetic ('J-shaped') nature.
Collapse
Affiliation(s)
- Christian Collin-Hansen
- Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
| | | | | |
Collapse
|
19
|
Costello LC, Franklin RB, Feng P. Mitochondrial function, zinc, and intermediary metabolism relationships in normal prostate and prostate cancer. Mitochondrion 2005; 5:143-53. [PMID: 16050980 PMCID: PMC4466120 DOI: 10.1016/j.mito.2005.02.001] [Citation(s) in RCA: 145] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2004] [Revised: 01/29/2005] [Accepted: 02/01/2005] [Indexed: 10/25/2022]
Abstract
Human prostate secretory epithelial cells have the uniquely specialized function of accumulating and secreting extremely high levels of citrate. This is achieved by their ability to accumulate high cellular levels of zinc that inhibit citrate oxidation. This process of net citrate production requires unique metabolic/bioenergetic mitochondrial relationships. In prostate cancer, the malignant cells undergo a metabolic transformation from zinc-accumulating citrate-producing sane cells to citrate-oxidizing malignant cells that lost the ability to accumulate zinc. This review describes the metabolic/bioenergetic, zinc and mitochondrial relationships involved in normal and malignant prostate. Hopefully, this report will generate much needed interest and research in this neglected, but critically important, area of investigation.
Collapse
Affiliation(s)
- L C Costello
- Cellular and Molecular Biology Section, Department of Biomedical Sciences, Dental School/University of Maryland, 666 West Baltimore Street, Baltimore, MD 21201, USA.
| | | | | |
Collapse
|
20
|
Franklin RB, Milon B, Feng P, Costello LC. Zinc and zinc transporters in normal prostate and the pathogenesis of prostate cancer. FRONT BIOSCI-LANDMRK 2005; 10:2230-9. [PMID: 15970489 PMCID: PMC4461430 DOI: 10.2741/1692] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Zinc is an essential metal for all cells. It plays a role in a wide variety of physiological and biochemical processes. In the prostate epithelial cell the accumulation of high cellular zinc is a specialized function that is necessary for these cells to carry out the major physiological functions of production and secretion of citrate. The production of citrate and its secretion into prostatic fluid is a differentiated function of the prostate epithelial cells that is apparently important for reproduction. The loss of citrate and zinc accumulation is the most consistent and persistent characteristic of prostate malignancy. This characteristic of prostate cancer indicates that the lost ability of the malignant cells to accumulate zinc and citrate is an important factor in the development and progression of malignancy. The lost ability of the epithelial cells to accumulate zinc and thus to also accumulate citrate is the result of decreased expression of specific zinc uptake transporters. The purpose of this presentation is to review the current understanding of zinc and zinc homeostasis in the prostate and the role of zinc and zinc transporters in the normal function of the prostate and the pathogenesis of prostate cancer.
Collapse
Affiliation(s)
- Renty B Franklin
- Department of Biomedical Sciences, Dental School, University of Maryland, Baltimore, MD 21201, USA.
| | | | | | | |
Collapse
|
21
|
Jansen S, Arning J, Dülcks T, Beyersmann D. S-Nitroso compounds interfere with zinc probing by Zinquin. Anal Biochem 2004; 332:145-52. [PMID: 15301959 DOI: 10.1016/j.ab.2004.05.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2004] [Indexed: 11/17/2022]
Abstract
The intracellular homeostasis of zinc is postulated to be controlled by signaling through nitric oxide (NO). Administration of the NO donor S-nitrosocysteine (SNOC) caused a rapid drop in the fluorescence of the zinc-specific fluorescence of the zinc probe zinquin in C6 glioma cells. Tentatively, a strong effect of NO on the level of mobile intracellular zinc ions was concluded. However, zinc analysis with atomic absorption spectrometry demonstrated that the total cellular zinc level was not changed under these conditions. Sodium nitrite or an NO donor devoid of sulfhydryl groups (diethylamine NONOate) exerted no degrading effect on the Zn/zinquin fluorescence, but cysteine alone evoked a similar decline as SNOC. Hence, the sulfhydryl groups of cysteine seem to compete for zinc from the Zn/zinquin complex. Analysis of the reaction products by mass spectrometry demonstrated that cysteine caused a depletion of zinc from the Zn/zinquin complex, whereas an NO donor without sulfhydryl groups (diethylamine NONOate) did not. It is concluded that great caution should be employed when using S-nitroso compounds together with zinquin in investigations of intracellular zinc homeostasis.
Collapse
Affiliation(s)
- Sven Jansen
- Department of Chemistry and Biology, Center for Biomolecular Interactions, University of Bremen, Leobener Str. NW2, 28359 Bremen, Germany
| | | | | | | |
Collapse
|
22
|
Jiménez Del Río M, Vélez-Pardo C. Transition metal-induced apoptosis in lymphocytes via hydroxyl radical generation, mitochondria dysfunction, and caspase-3 activation: an in vitro model for neurodegeneration. Arch Med Res 2004; 35:185-93. [PMID: 15163458 DOI: 10.1016/j.arcmed.2004.01.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2003] [Accepted: 01/23/2004] [Indexed: 11/30/2022]
Abstract
BACKGROUND Redox transition metals have been implicated as crucial players in pathogenesis of neurodegenerative diseases. Intracellular signaling mechanism(s) responsible for oxidative stress and death in single-cell model exposed to metals has not yet been fully elucidated. The objective of the study was to determine the mechanism by which metals induced apoptosis in human peripheral blood lymphocytes (PBL). METHODS PBL were exposed to 50, 100, 250, 500, and 1,000 microM (Fe2+), (Mn2+), (Cu2+), and (Zn2+)-(SO4). Apoptotic/necrotic morphology was assessed with acridine orange/ethidium bromide staining. Further evaluations comprised production of H2O2, generation of hydroxyl radical (.OH), disruption of mitochondrial transmembrane potential (DeltaPsim), caspase-3 activation, and activation of NF-kappaB and p53 transcriptional factors. RESULTS Morphologic analysis showed that 500 microM provoked maximal percentage of apoptosis (22-30% AO/EB) and minimal necrosis (3-7%), whereas low concentrations were innocuous but 1,000 microM induced mainly necrosis (>40% AO/EB). Metals generated both H2O2 and (.OH) by Fenton reaction. Hydroxyl scavengers protected PBL from metal-induced apoptosis. All metals induced mitochondrial depolarization (17-62% nonfluorescent cells) and activated caspase-3 concomitantly with apoptotic morphology (25-32% AO/EB) at 24 h, and neither NF-kappaB nor p53 transcription factor showed activation. CONCLUSIONS This study provides evidence that redox-active (Fe2+), (Mn2+), (Cu2+), and (Zn2+) ion-induced apoptosis in PBL by (H2O2)/(.OH) generation, resulting in mitochondria depolarization, caspase-3 activation, and nuclear fragmentation independent of NF-kappaB and p53 transcription factors activation. Our data highlight the potential use of lymphocytes as a model to screen antioxidant strategies designed to remove H2O2/.OH associated with metal-catalyzed reactions in neurodegenerative disorders.
Collapse
Affiliation(s)
- Marlene Jiménez Del Río
- Facultad de Medicina, Departamento de Medicina Interna, Programa de Investigación en Neurociencias, Universidad de Antioquia, Medellín, Colombia.
| | | |
Collapse
|
23
|
Glover CN, Bury NR, Hogstrand C. Intestinal zinc uptake in freshwater rainbow trout: evidence for apical pathways associated with potassium efflux and modified by calcium. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2004; 1663:214-21. [PMID: 15157623 DOI: 10.1016/j.bbamem.2004.03.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2003] [Revised: 03/01/2004] [Accepted: 03/19/2004] [Indexed: 11/20/2022]
Abstract
Understanding the mechanisms of intestinal zinc uptake in fish is of considerable interest from both nutritional and toxicological perspectives. In this study, properties of zinc transport across the apical membrane of freshwater rainbow trout intestinal epithelia were examined using right-side-out brush border membrane vesicles (BBMV's). Extravesicular calcium was found to have complex actions on zinc uptake. At a low zinc concentration of 1 microM, calcium (0.1-2 mM) significantly stimulated zinc uptake. In contrast, calcium inhibited zinc uptake at higher zinc levels (100 microM). Lanthanum and cadmium in the external medium did not block zinc uptake, suggesting that interactions between zinc and calcium were not exerted at a calcium channel. Copper also failed to exercise any inhibitory action. Zinc association with the BBMV's was enhanced by an outward potassium gradient. This stimulatory effect was only present at a zinc concentration of 100 microM. The potassium channel blocker, tetraethylammonium chloride inhibited zinc uptake at this relatively high zinc concentration, suggesting the presence of a low affinity zinc uptake pathway linked to potassium efflux. The present study provides evidence that the mechanism of intestinal zinc uptake in rainbow trout is pharmacologically very different from that of the piscine gill and the mammalian intestine.
Collapse
Affiliation(s)
- Chris N Glover
- School of Health and Life Sciences, King's College London, Franklin Wilkins Building, 150 Stamford Street, London SE1 9NN, UK.
| | | | | |
Collapse
|
24
|
Haase H, Beyersmann D. Intracellular zinc distribution and transport in C6 rat glioma cells. Biochem Biophys Res Commun 2002; 296:923-8. [PMID: 12200136 DOI: 10.1016/s0006-291x(02)02017-x] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In mammalian cells, the intracellular availability of zinc influences numerous crucial processes. Its distribution has previously been visualized with several fluorescent probes, but it was unclear how these probes are compartmentalized within the cell. Here, we show that in C6 cells the zinc-specific probe Zinquin is evenly distributed. Thus, the significantly lower level of fluorescence in the nucleus and a punctuate vesicular staining are real differences in the concentrations of zinc. Chemical perturbation of the steady state by releasing intracellular protein-bound zinc with the sulfhydryl-reactive N-ethylmaleimide (NEM) resulted in a vanadate sensitive transport of zinc out of the nucleus and into zincosomes. If the zinc-release was performed with the histidine-reactive diethylpyrocarbonate, sequestration was reduced compared to treatment with NEM, indicating the importance of histidine within membrane zinc transporters. Another major factor regulating the zinc homeostasis is ion export. As determined by atomic absorption spectroscopy, up to 50% of the cellular zinc was exported by a mechanism sensitive to lanthanum ions. We conclude that different concentrations of labile zinc exist in different cellular compartments, which are maintained by export and intracellular transport of zinc.
Collapse
Affiliation(s)
- Hajo Haase
- Department of Biology and Chemistry, University of Bremen, 28359 Bremen, Germany.
| | | |
Collapse
|