1
|
Dresler SR, Pinto BI, Salanga MC, Propper CR, Berry SR, Kellar RS. Arsenic Impairs Wound Healing Processes in Dermal Fibroblasts and Mice. Int J Mol Sci 2024; 25:2161. [PMID: 38396835 PMCID: PMC10888720 DOI: 10.3390/ijms25042161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/03/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
Inorganic arsenic (NaAsO2) is a naturally occurring metalloid found in water resources globally and in the United States at concentrations exceeding the U.S. Environmental Protection Agency Maximum Contamination Level of 10 ppb. While exposure to arsenic has been linked to cancer, cardiovascular disease, and skin lesions, the impact of arsenic exposure on wound healing is not fully understood. Cultured dermal fibroblasts exposed to NaAsO2 displayed reduced migration (scratch closure), proliferation, and viability with a lowest observable effect level (LOEL) of 10 µM NaAsO2 following 24 h exposure. An enrichment of Matrix Metalloproteinase 1 (MMP1) transcripts was observed at a LOEL of 1 µM NaAsO2 and 24 h exposure. In vivo, C57BL/6 mice were exposed to 10 µM NaAsO2 in their drinking water for eight weeks, then subjected to two full thickness dorsal wounds. Wounds were evaluated for closure after 6 days. Female mice displayed a significant reduction in wound closure and higher erythema levels, while males showed no effects. Gene expression analysis from skin excised from the wound site revealed significant enrichment in Arsenic 3-Methyltransferase (As3mt) and Estrogen Receptor 2 (Esr2) mRNA in the skin of female mice. These results indicate that arsenic at environmentally relevant concentrations may negatively impact wound healing processes in a sex-specific manner.
Collapse
Affiliation(s)
- Sara R. Dresler
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Bronson I. Pinto
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Matthew C. Salanga
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Catherine R. Propper
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Savannah R. Berry
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
| | - Robert S. Kellar
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA; (S.R.D.); (B.I.P.); (M.C.S.); (C.R.P.); (S.R.B.)
- Center for Materials Interfaces in Research & Applications, ¡MIRA!, Flagstaff, AZ 86011, USA
| |
Collapse
|
2
|
Todero J, Douillet C, Shumway AJ, Koller BH, Kanke M, Phuong DJ, Stýblo M, Sethupathy P. Molecular and Metabolic Analysis of Arsenic-Exposed Humanized AS3MT Mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2023; 131:127021. [PMID: 38150313 PMCID: PMC10752418 DOI: 10.1289/ehp12785] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 10/30/2023] [Accepted: 12/04/2023] [Indexed: 12/29/2023]
Abstract
BACKGROUND Chronic exposure to inorganic arsenic (iAs) has been associated with type 2 diabetes (T2D). However, potential sex divergence and the underlying mechanisms remain understudied. iAs is not metabolized uniformly across species, which is a limitation of typical exposure studies in rodent models. The development of a new "humanized" mouse model overcomes this limitation. In this study, we leveraged this model to study sex differences in the context of iAs exposure. OBJECTIVES The aim of this study was to determine if males and females exhibit different liver and adipose molecular profiles and metabolic phenotypes in the context of iAs exposure. METHODS Our study was performed on wild-type (WT) 129S6/SvEvTac and humanized arsenic + 3 methyl transferase (human AS3MT) 129S6/SvEvTac mice treated with 400 ppb of iAs via drinking water ad libitum. After 1 month, mice were sacrificed and the liver and gonadal adipose depots were harvested for iAs quantification and sequencing-based microRNA and gene expression analysis. Serum blood was collected for fasting blood glucose, fasting plasma insulin, and homeostatic model assessment for insulin resistance (HOMA-IR). RESULTS We detected sex divergence in liver and adipose markers of diabetes (e.g., miR-34a, insulin signaling pathways, fasting blood glucose, fasting plasma insulin, and HOMA-IR) only in humanized (not WT) mice. In humanized female mice, numerous genes that promote insulin sensitivity and glucose tolerance in both the liver and adipose are elevated compared to humanized male mice. We also identified Klf11 as a putative master regulator of the sex divergence in gene expression in humanized mice. DISCUSSION Our study underscored the importance of future studies leveraging the humanized mouse model to study iAs-associated metabolic disease. The findings suggested that humanized males are at increased risk for metabolic dysfunction relative to humanized females in the context of iAs exposure. Future investigations should focus on the detailed mechanisms that underlie the sex divergence. https://doi.org/10.1289/EHP12785.
Collapse
Affiliation(s)
- Jenna Todero
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Christelle Douillet
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Alexandria J. Shumway
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Beverly H. Koller
- Department of Genetics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Matt Kanke
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Daryl J. Phuong
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Miroslav Stýblo
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Praveen Sethupathy
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| |
Collapse
|
3
|
Pollack AZ, Marroquin JM. Invited Perspective: Metals and Menarche. ENVIRONMENTAL HEALTH PERSPECTIVES 2023; 131:21301. [PMID: 36729393 PMCID: PMC9894152 DOI: 10.1289/ehp12555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 06/18/2023]
Affiliation(s)
- Anna Z. Pollack
- Department of Global and Community Health, College of Public Health, George Mason University, Fairfax, Virginia, USA
| | - Joanna M. Marroquin
- Department of Global and Community Health, College of Public Health, George Mason University, Fairfax, Virginia, USA
| |
Collapse
|
4
|
Pánico P, Velasco M, Salazar AM, Picones A, Ortiz-Huidobro RI, Guerrero-Palomo G, Salgado-Bernabé ME, Ostrosky-Wegman P, Hiriart M. Is Arsenic Exposure a Risk Factor for Metabolic Syndrome? A Review of the Potential Mechanisms. Front Endocrinol (Lausanne) 2022; 13:878280. [PMID: 35651975 PMCID: PMC9150370 DOI: 10.3389/fendo.2022.878280] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 04/11/2022] [Indexed: 12/14/2022] Open
Abstract
Exposure to arsenic in drinking water is a worldwide health problem. This pollutant is associated with increased risk of developing chronic diseases, including metabolic diseases. Metabolic syndrome (MS) is a complex pathology that results from the interaction between environmental and genetic factors. This condition increases the risk of developing type 2 diabetes, cardiovascular diseases, and cancer. The MS includes at least three of the following signs, central obesity, impaired fasting glucose, insulin resistance, dyslipidemias, and hypertension. Here, we summarize the existing evidence of the multiple mechanisms triggered by arsenic to developing the cardinal signs of MS, showing that this pollutant could contribute to the multifactorial origin of this pathology.
Collapse
Affiliation(s)
- Pablo Pánico
- Department of Cognitive Neurosciences, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Myrian Velasco
- Department of Cognitive Neurosciences, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Ana María Salazar
- Department of Genomic Medicine and Environmental Toxicology. Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Arturo Picones
- Department of Cognitive Neurosciences, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Rosa Isela Ortiz-Huidobro
- Department of Cognitive Neurosciences, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Gabriela Guerrero-Palomo
- Department of Genomic Medicine and Environmental Toxicology. Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Manuel Eduardo Salgado-Bernabé
- Department of Cognitive Neurosciences, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Patricia Ostrosky-Wegman
- Department of Genomic Medicine and Environmental Toxicology. Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Marcia Hiriart
- Department of Cognitive Neurosciences, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
- *Correspondence: Marcia Hiriart,
| |
Collapse
|
5
|
Thakur B, Arora K, Gupta A, Guptasarma P. The DNA-binding protein HU is a molecular glue that attaches bacteria to extracellular DNA in biofilms. J Biol Chem 2021; 296:100532. [PMID: 33713701 PMCID: PMC8063757 DOI: 10.1016/j.jbc.2021.100532] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 03/05/2021] [Accepted: 03/09/2021] [Indexed: 02/06/2023] Open
Abstract
In biofilms, bacteria that possess a negatively charged surface are embedded within a matrix of polymers consisting mainly of negatively charged extracellular DNA (e-DNA). In all likelihood, a multivalent positively charged substance, for example, a basic protein, exists within biofilms to neutralize charge–charge repulsions and act as a ‘glue’ attaching negatively charged bacteria to negatively charged e-DNA; however, no protein capable of doing so has yet been identified. We decided to investigate whether a highly abundant nucleoid-associated histone-like protein (HU) happens to be the glue in question. In recent years, HU has been shown to possess qualities that could be considered desirable in the proposed glue, for example, (a) availability in association with e-DNA; (b) multivalent DNA binding; (c) non–sequence-specific DNA-binding; (d) enhancement of biofilm formation upon exogenous addition, and (e) disruption of biofilms, upon removal by HU–cognate antibodies. Geometric considerations suggest that basic residues in HU's canonical and noncanonical DNA-binding sites can interact with sugar-linked terminal phosphates in lipopolysaccharide (LPS) molecules in bacterial outer membranes. Here, using genetic, spectroscopic, biophysical–chemical, microscopy-based, and cytometry-based experiments, we demonstrate that HU's DNA-binding sites also bind to LPS, that this facilitates DNA–DNA, DNA–LPS, and LPS–LPS interactions, and that this facilitates bacterial clumping and attachment of bacteria to DNA. Exogenous addition of HU to bacteria in (nonshaken) cultures is shown to cause cells to become engulfed in a matrix of DNA, potentially arising from the lysis of bacteria with vulnerable cell walls (as they strain to grow, divide, and move away from each other, in opposition to the accreting influence of HUs).
Collapse
Affiliation(s)
- Bhishem Thakur
- Centre for Protein Science, Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Punjab, India
| | - Kanika Arora
- Centre for Protein Science, Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Punjab, India
| | - Archit Gupta
- Centre for Protein Science, Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Punjab, India
| | - Purnananda Guptasarma
- Centre for Protein Science, Design and Engineering (CPSDE), Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Punjab, India.
| |
Collapse
|
6
|
Potential facet for prenatal arsenic exposure paradigm: linking endocrine disruption and epigenetics. THE NUCLEUS 2019. [DOI: 10.1007/s13237-019-00274-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
|
7
|
Ashley-Martin J, Dodds L, Arbuckle TE, Bouchard MF, Shapiro GD, Fisher M, Monnier P, Morisset AS, Ettinger AS. Association between maternal urinary speciated arsenic concentrations and gestational diabetes in a cohort of Canadian women. ENVIRONMENT INTERNATIONAL 2018; 121:714-720. [PMID: 30321846 DOI: 10.1016/j.envint.2018.10.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/03/2018] [Accepted: 10/04/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Epidemiological and toxicological evidence suggests that maternal total arsenic (As) levels are associated with an elevated risk of gestational diabetes (GDM). Uncertainty remains regarding the metabolic toxicity of specific arsenic species, comprised of both organic and inorganic sources of arsenic exposure. OBJECTIVES We assessed associations between speciated As and GDM using data from the Maternal-Infant Research on Environmental Chemicals (MIREC) Study. METHODS Concentrations of speciated As [(inorganic (trivalent, pentavalent)), methylated arsenic species metabolites (monomethylarsonic acid (MMA), dimethylarsinic acid (DMA)), and organic (arsenobetaine)] were measured in first trimester maternal urine samples. GDM cases were identified in accordance with Canadian guidelines. Multivariable regression models were used to estimate associations between speciated As and GDM, evaluate potential interaction between speciated As exposures, and assess fetal sex-specific findings. RESULTS Among 1243 women who had a live, singleton birth and no previous history of diabetes, 4% met the diagnostic criteria for GDM. Our analyses focused on DMA and arsenobetaine as these were the subtypes with detectable concentrations in at least 40% of samples. Compared to women in the lowest tertile of DMA (<1.49 μg As/L), women with concentrations exceeding 3.52 μg As/L (3rd tertile) experienced an increased risk of GDM (aOR = 3.86; 95% CI: 1.18, 12.57) (p-value for trend across tertiles = 0.04). When restricted to women carrying male infants, the magnitude of this association increased (aOR 3rd tertile = 4.71; 95% CI: 1.05, 21.10). CONCLUSIONS These results suggest a positive relation between DMA and GDM; potential differences in risk by fetal sex requires further investigation.
Collapse
|
8
|
Pinto BI, Lujan OR, Ramos SA, Propper CR, Kellar RS. Estrogen Mitigates the Negative Effects of Arsenic Contamination in an In Vitro Wound Model. APPLIED IN VITRO TOXICOLOGY 2018; 4:24-29. [PMID: 30956995 PMCID: PMC5881251 DOI: 10.1089/aivt.2017.0020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Arsenic, a naturally occurring environmental contaminant, is harmful to humans at elevated concentrations. Increased levels of arsenic in the environment occur as a result of human activities and from natural geologically sourced leaching into ground and surface water. These sources pose an exposure risk above the USEPA standard to individuals whose food and water sources become contaminated. Arsenic exposure negatively impacts organ function and increases the risk for developing pathologies, including cancer. Some of the effects of arsenic on cancer translate to normal cell function in wound healing. To evaluate whether arsenic influences wound healing, an in vitro scratch assay was employed to study the effects of arsenic on cellular migration, which is a key component in the normal wound-healing process. In this study, skin cells were exposed to environmentally relevant concentrations of arsenic, and wound closure was evaluated. Results indicated that arsenic significantly decreased the rate of cellular migration in the scratch assay when compared with controls. In addition, estradiol, which has been shown to positively influence cellular and tissue processes involved in wound healing, reversed the slowing effects of arsenic on wound closure. These results suggest that arsenic contamination may inhibit, and estrogen may provide a therapeutic benefit for individuals with arsenic-contaminated wounds.
Collapse
Affiliation(s)
- Bronson I. Pinto
- Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona
- Center for Bioengineering Innovation, Northern Arizona University, Flagstaff, Arizona
| | - Oscar R. Lujan
- Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona
| | - Stephan A. Ramos
- Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona
| | - Catherine R. Propper
- Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona
- Center for Bioengineering Innovation, Northern Arizona University, Flagstaff, Arizona
| | - Robert S. Kellar
- Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona
- Center for Bioengineering Innovation, Northern Arizona University, Flagstaff, Arizona
- Department of Mechanical Engineering, Northern Arizona University, Flagstaff, Arizona
| |
Collapse
|