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Hashemi M, Zandieh MA, Talebi Y, Rahmanian P, Shafiee SS, Nejad MM, Babaei R, Sadi FH, Rajabi R, Abkenar ZO, Rezaei S, Ren J, Nabavi N, Khorrami R, Rashidi M, Hushmandi K, Entezari M, Taheriazam A. Paclitaxel and docetaxel resistance in prostate cancer: Molecular mechanisms and possible therapeutic strategies. Biomed Pharmacother 2023; 160:114392. [PMID: 36804123 DOI: 10.1016/j.biopha.2023.114392] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/24/2023] [Accepted: 02/08/2023] [Indexed: 02/17/2023] Open
Abstract
Prostate cancer is among most malignant tumors around the world and this urological tumor can be developed as result of genomic mutations and their accumulation during progression towards advanced stage. Due to lack of specific symptoms in early stages of prostate cancer, most cancer patients are diagnosed in advanced stages that tumor cells display low response to chemotherapy. Furthermore, genomic mutations in prostate cancer enhance the aggressiveness of tumor cells. Docetaxel and paclitaxel are suggested as well-known compounds for chemotherapy of prostate tumor and they possess a similar function in cancer therapy that is based on inhibiting depolymerization of microtubules, impairing balance of microtubules and subsequent delay in cell cycle progression. The aim of current review is to highlight mechanisms of paclitaxel and docetaxel resistance in prostate cancer. When oncogenic factors such as CD133 display upregulation and PTEN as tumor-suppressor shows decrease in expression, malignancy of prostate tumor cells enhances and they can induce drug resistance. Furthermore, phytochemicals as anti-tumor compounds have been utilized in suppressing chemoresistance in prostate cancer. Naringenin and lovastatin are among the anti-tumor compounds that have been used for impairing progression of prostate tumor and enhancing drug sensitivity. Moreover, nanostructures such as polymeric micelles and nanobubbles have been utilized in delivery of anti-tumor compounds and decreasing risk of chemoresistance development. These subjects are highlighted in current review to provide new insight for reversing drug resistance in prostate cancer.
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Affiliation(s)
- Mehrdad Hashemi
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical sciences, Islamic Azad University, Tehran, Iran; Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mohammad Arad Zandieh
- Department of Food Hygiene and Quality Control, Division of Epidemiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Yasmin Talebi
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical sciences, Islamic Azad University, Tehran, Iran
| | - Parham Rahmanian
- Faculty of Veterinary Medicine, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | - Sareh Sadat Shafiee
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical sciences, Islamic Azad University, Tehran, Iran
| | - Melina Maghsodlou Nejad
- Faculty of Veterinary Medicine, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | - Roghayeh Babaei
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical sciences, Islamic Azad University, Tehran, Iran
| | - Farzaneh Hasani Sadi
- General Practitioner, Kerman University of Medical Sciences, Kerman 7616913555, Iran
| | - Romina Rajabi
- Faculty of Veterinary Medicine, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | | | - Shamin Rezaei
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical sciences, Islamic Azad University, Tehran, Iran
| | - Jun Ren
- Shanghai Institute of Cardiovascular Diseases, Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Noushin Nabavi
- Department of Urologic Sciences and Vancouver Prostate Centre, University of British Columbia, V6H3Z6 Vancouver, BC, Canada
| | - Ramin Khorrami
- Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Mohsen Rashidi
- Department Pharmacology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran; The Health of Plant and Livestock Products Research Center, Mazandaran University of Medical Sciences, Sari, Iran.
| | - Kiavash Hushmandi
- Department of Food Hygiene and Quality Control, Division of Epidemiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
| | - Maliheh Entezari
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical sciences, Islamic Azad University, Tehran, Iran; Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Afshin Taheriazam
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical sciences, Islamic Azad University, Tehran, Iran; Department of Orthopedics, Faculty of Medicine, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
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Chung JH, Phalke N, Hastings C, Killilea DW, Feusner JH, Fung EB. Zinc deficiency and its association with treatment-related toxicity in children with cancer. Pediatr Blood Cancer 2021; 68:e29104. [PMID: 34061438 DOI: 10.1002/pbc.29104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 03/24/2021] [Accepted: 04/27/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND Nutritional deficiencies in children with cancer at time of diagnosis and during treatment may negatively affect disease outcome and increase treatment-related toxicity. Yet zinc, an essential nutrient important for supporting immune function and known for reducing diarrheal episodes, is rarely assessed in these children. PROCEDURES Fifty children (1 month to 18 years) with recently diagnosed cancer were enrolled in this study. An age and gender matched control group (n = 50) was also recruited. Plasma and urinary zinc, plasma copper, and C-reactive protein (CRP) levels were measured at baseline, 3, and 6 months following diagnosis. A retrospective review of the toxicity profile was performed in the cohort of children with cancer for the first 4 years after initial diagnosis. RESULTS CRP and plasma copper (both acute-phase reactants) were elevated in patients with cancer compared to controls at baseline, both p < .03. Plasma zinc levels were not significantly different from controls at baseline, but decreased by 11% in the cancer group over 6 months of treatment, 83.2 ± 15.6 to 74.3 ± 14.8 μg/dl, p = .01. Plasma zinc dropped to deficient levels in 35% of cases over the initial 6 months. Zinc deficiency at 6 months was related to an increased incidence of severe diarrhea during 4 years of follow-up, p < .001. CONCLUSIONS Zinc deficiency is an underrecognized problem among patients undergoing treatment for cancer and is associated with severe diarrhea. Further studies are needed to evaluate causes for zinc deficiency, related effects, and a possible role for zinc supplementation.
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Affiliation(s)
- Jong H Chung
- Department of Pediatrics, Hematology Oncology, University of California Davis Medical Center, Sacramento, California, USA
| | - Neelam Phalke
- Department of Otolaryngology, Louisiana State University School of Medicine, New Orleans, Louisiana, USA
| | - Caroline Hastings
- Department of Hematology Oncology, UCSF Benioff Children's Hospital Oakland, Oakland, California, USA
| | - David W Killilea
- Children's Hospital Oakland Research Institute, Oakland, California, USA
| | - James H Feusner
- Department of Hematology Oncology, UCSF Benioff Children's Hospital Oakland, Oakland, California, USA
| | - Ellen B Fung
- Department of Hematology Oncology, UCSF Benioff Children's Hospital Oakland, Oakland, California, USA.,Children's Hospital Oakland Research Institute, Oakland, California, USA
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Mokarram M, Amin H, Setoodeh A. Assessment of heavy metals contamination and the risk of non-cancerous diseases in vegetable using electromagnetic-chemical. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:36362-36376. [PMID: 32556992 DOI: 10.1007/s11356-020-09690-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 06/10/2020] [Indexed: 05/27/2023]
Abstract
This study seeks to assess the reaction of the eggplant (Solanum melongena L.) to soil samples contaminated. Following, cultivation, growth, and harvest, the plant samples were prepared and maximum absorption rates of heavy metals were measured in both leaf and fruit. The estimated daily intake (EDI), the target hazard quotient (THQ), and the bio-concentration factor (BCF) were measured at various intervals during the growth period of the plant. Spectral analysis was also performed to assess the reaction of target crops to heavy metals. The results showed that in the second and third stages of plant growth, the THQ values were more than 1 for infected plants with Cd, Pb, and Zn. According to results from the BCF analysis, the absorption rate in Pb, during the growth stages was relatively high, in crops contaminated by Ni was around 1 in the second and third stages, and in plants contaminated by Cd was extremely high. All crops contaminated by heavy metals showed higher reflection rates in the 400-500 and 600-700 nm range. So, using electromagnetic waves during different stages of growth, the reaction of eggplant cultivated in soil samples contaminated by heavy metals is predictable.
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Affiliation(s)
- Marzieh Mokarram
- Department of Range and Watershed Management, College of Agriculture and Natural Resources of Darab, Shiraz University, Shiraz, 71946-84471, Iran.
| | - Hosein Amin
- Department of Plant Production, College of Agriculture and Natural Resources of Darab, Shiraz University, Shiraz, Iran
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Killilea DW, Chow D, Xiao SQ, Li C, Stoller ML. Flame retardant tris(1,3-dichloro-2-propyl)phosphate (TDCPP) toxicity is attenuated by N-acetylcysteine in human kidney cells. Toxicol Rep 2017; 4:260-264. [PMID: 28959647 PMCID: PMC5615114 DOI: 10.1016/j.toxrep.2017.05.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 05/11/2017] [Accepted: 05/14/2017] [Indexed: 12/21/2022] Open
Abstract
Prolonged exposure to the flame retardants found in many household products and building materials is associated with adverse developmental, reproductive, and carcinogenic consequences. While these compounds have been studied in numerous epidemiological and animal models, less is known about the effects of flame retardant exposure on cell function. This study evaluated the toxicity of the commonly used fire retardant tris(1,3-dichloro-2-propyl)phosphate (TDCPP) in cell line derived from the kidney, a major tissue target of organohalogen toxicity. TDCPP inhibited cell growth at lower concentrations (IC50 27 μM), while cell viability and toxicity were affected at higher concentrations (IC50 171 μM and 168 μM, respectively). TDCPP inhibited protein synthesis and caused cell cycle arrest, but only at higher concentrations. Additionally, the antioxidant N-acetylcysteine (NAC) reduced cell toxicity in cells treated with TDCPP, suggesting that exposure to TDCPP increased oxidative stress in the cells. In summary, these data show that low concentrations of TDCPP result in cytostasis in a kidney cell line, whereas higher concentrations induce cell toxicity. Furthermore, TDCPP toxicity can be attenuated by NAC, suggesting that antioxidants may be effective countermeasures to some organohalogen exposures.
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Key Words
- ATSDR, Agency for Toxic Substances and Disease Registry
- DMEM, Dulbecco’s Modified Eagle Medium
- DMSO, dimethyl sulfoxide
- EDTA, ethylenediamine tetraacetic acid
- FBS, fetal bovine serum
- N-acetylcysteine (PubChem CID: 12035)
- NAC, N-acetylcysteine
- SFFCPF, San Francisco Firefighters Cancer Prevention Foundation
- TDCPP, tris(1,3-dichloro-2-propyl)phosphate
- TR, thyroid hormone receptor
- Tris(1,3-dichloro-2-propyl)phosphate (PubChem CID: 26177)
- Tris, tris(2,3-dibromopropyl)phosphate
- antioxidant
- cell cycle
- cell toxicity
- cytostasis
- flame retardant
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Affiliation(s)
- David W. Killilea
- Children’s Hospital Oakland Research Institute, Oakland, CA, USA
- Department of Urology, University of California, San Francisco, CA, USA
- Corresponding author at: Children’s Hospital Oakland Research Institute, 5700 Martin Luther King, Jr. Way, Oakland, California 94609, USA.Children’s Hospital Oakland Research InstituteOaklandCAUSA
| | - Darryl Chow
- Children’s Hospital Oakland Research Institute, Oakland, CA, USA
| | - Sheng Qi Xiao
- Children’s Hospital Oakland Research Institute, Oakland, CA, USA
| | - Charles Li
- Children’s Hospital Oakland Research Institute, Oakland, CA, USA
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Holland TC, Killilea DW, Shenvi SV, King JC. Acute changes in cellular zinc alters zinc uptake rates prior to zinc transporter gene expression in Jurkat cells. Biometals 2015; 28:987-96. [DOI: 10.1007/s10534-015-9883-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Accepted: 09/22/2015] [Indexed: 01/07/2023]
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Kocdor H, Ates H, Aydin S, Cehreli R, Soyarat F, Kemanli P, Harmanci D, Cengiz H, Kocdor MA. Zinc supplementation induces apoptosis and enhances antitumor efficacy of docetaxel in non-small-cell lung cancer. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:3899-909. [PMID: 26251569 PMCID: PMC4524380 DOI: 10.2147/dddt.s87662] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND Exposure to exogenous zinc results in increased apoptosis, growth inhibition, and altered oxidative stress in cancer cells. Previous studies also suggested that zinc sensitizes some cancer cells to cytotoxic agents depending on the p53 status. Therefore, zinc supplementation may show anticancer efficacy solely and may increase docetaxel-induced cytotoxicity in non-small-cell lung cancer cells. METHODS Here, we report the effects of several concentrations of zinc combined with docetaxel on p53-wild-type (A549) and p53-null (H1299) cells. We evaluated cellular viability, apoptosis, and cell cycle progression as well as oxidative stress parameters, including superoxide dismutase, glutathione peroxidase, and malondialdehyde levels. RESULTS Zinc reduced the viability of A549 cells and increased the apoptotic response in both cell lines in a dose-dependent manner. Zinc also amplified the docetaxel effects and reduced its inhibitory concentration 50 (IC50) values. The superoxide dismutase levels increased in all treatment groups; however, glutathione peroxidase was slightly increased in the combination treatments. Zinc also caused malondialdehyde elevations at 50 μM and 100 μM. CONCLUSION Zinc has anticancer efficacy against non-small-cell lung cancer cells in the presence of functionally active p53 and enhances docetaxel efficacy in both p53-wild-type and p53-deficient cancer cells.
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Affiliation(s)
- Hilal Kocdor
- Institute of Oncology, Dokuz Eylul University, Izmir Turkey ; Department of Molecular Medicine, Institute of Health Sciences, Dokuz Eylul University, Izmir Turkey
| | - Halil Ates
- Institute of Oncology, Dokuz Eylul University, Izmir Turkey
| | - Suleyman Aydin
- Department of Biochemistry, Firat University School of Medicine, Elazig, Turkey
| | - Ruksan Cehreli
- Institute of Oncology, Dokuz Eylul University, Izmir Turkey
| | - Firat Soyarat
- Department of Molecular Medicine, Institute of Health Sciences, Dokuz Eylul University, Izmir Turkey
| | - Pinar Kemanli
- Department of Molecular Medicine, Institute of Health Sciences, Dokuz Eylul University, Izmir Turkey
| | - Duygu Harmanci
- Department of Molecular Medicine, Institute of Health Sciences, Dokuz Eylul University, Izmir Turkey
| | - Hakan Cengiz
- Department of Molecular Medicine, Institute of Health Sciences, Dokuz Eylul University, Izmir Turkey
| | - Mehmet Ali Kocdor
- Department of Surgery, School of Medicine, Dokuz Eylul University, Izmir, Turkey
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Lee MJ, Alvarez JA, Smith EM, Killilea DW, Chmiel JF, Joseph PM, Grossmann RE, Gaggar A, Ziegler TR, Tangpricha V. Changes in Mineral Micronutrient Status During and After Pulmonary Exacerbation in Adults With Cystic Fibrosis. Nutr Clin Pract 2015; 30:838-43. [PMID: 26078287 DOI: 10.1177/0884533615589991] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Patients with cystic fibrosis (CF) may be at risk for micronutrient depletion, particularly during periods of illness and infection. The purpose of this study was to investigate serum micronutrient status over time in adults with CF initially hospitalized with a pulmonary exacerbation. MATERIALS AND METHODS This was an ancillary study of a multicenter trial investigating the role of high-dose vitamin D supplementation in 24 adults with CF (mean age, 29.6 ± 7.3 years). We measured serum concentrations of copper (Cu), iron (Fe), calcium (Ca), magnesium (Mg), potassium (K), and sulfur (S) in subjects at the beginning of a pulmonary exacerbation and again at 3 months. RESULTS Serum concentrations of Cu, Fe, and Ca were significantly lower at baseline compared with 3 months following the pulmonary exacerbation (Cu: baseline, 1.5 ± 0.6 vs 3 months, 1.6 ± 0.6 µg/mL, P = .027; Fe: 0.8 ± 0.3 vs 1.3 ± 1.1 µg/mL, P = .026; Ca: 9.7 ± 0.8 vs 10.8 ± 2.0 mg/dL, P = .024). Serum concentrations of K, Mg, and S did not change over time (K: baseline, 4.9 ± 0.3 vs 3 months, 5.1 ± 0.5 mEq/L; Mg: 1.8 ± 0.2 vs 2.0 ± 0.3 mg/dL; S: 1288.6 ± 343 vs 1309.9 ± 290 µg/mL; P > .05 for all). CONCLUSION Serum concentrations of Cu, Fe, and Ca increased significantly several months following recovery from acute pulmonary exacerbation in adults with CF. This may reflect decreased inflammation, improved food intake, and/or increased absorption following recovery.
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Affiliation(s)
- Moon Jeong Lee
- Division of Endocrinology, Metabolism and Lipids, Department of Medicine, Emory University School of Medicine, and the Atlanta VA Medical Center, Atlanta, Georgia
| | - Jessica A Alvarez
- Division of Endocrinology, Metabolism and Lipids, Department of Medicine, Emory University School of Medicine, and the Atlanta VA Medical Center, Atlanta, Georgia Center for Clinical and Molecular Nutrition, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Ellen M Smith
- Nutrition & Health Sciences Program, Laney Graduate School, Emory University, Atlanta, Georgia
| | - David W Killilea
- Nutrition & Metabolism Center, Children's Hospital Oakland Research Institute, Oakland, California
| | - James F Chmiel
- Department of Pediatrics, Case Western Reserve University School of Medicine and Rainbow Babies and Children's Hospital, Cleveland, Ohio
| | - Patricia M Joseph
- Division of Pulmonary, Critical Care & Sleep Medicine, Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio
| | | | - Amit Gaggar
- University of Alabama at Birmingham, Birmingham, Alabama
| | - Thomas R Ziegler
- Division of Endocrinology, Metabolism and Lipids, Department of Medicine, Emory University School of Medicine, and the Atlanta VA Medical Center, Atlanta, Georgia Center for Clinical and Molecular Nutrition, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Vin Tangpricha
- Division of Endocrinology, Metabolism and Lipids, Department of Medicine, Emory University School of Medicine, and the Atlanta VA Medical Center, Atlanta, Georgia Center for Clinical and Molecular Nutrition, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia Nutrition & Health Sciences Program, Laney Graduate School, Emory University, Atlanta, Georgia
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Kaba M, Pirincci N, Yuksel MB, Gecit I, Gunes M, Ozveren H, Eren H, Demir H. Serum levels of trace elements in patients with prostate cancer. Asian Pac J Cancer Prev 2015; 15:2625-9. [PMID: 24761874 DOI: 10.7314/apjcp.2014.15.6.2625] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Trace elements are major components of biological structures; however, excessive levels of these elements can be toxic. MATERIALS AND METHODS In the present study, serum levels of trace elements were measured in 30 patients with newly diagnosed as prostate cancer and 32 healthy volunteer by using furnace atomic absorption spectrophotometry. RESULTS It was found that there was an increase in serum levels of Co, Cu, Mg and Pb (p<0.05), whereas a decrease in serum levels of Fe, Mn, and Zn levels in patients with prostate cancer (p<0.05). CONCLUSIONS These changes may be important in the pathogenesis of prostate cancers; however, further prospective studies are needed to identify relationships between prostate cancer and trace elements.
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Affiliation(s)
- Mehmet Kaba
- Department of Urology, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey E-mail :
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Hassan F, Xu X, Nuovo G, Killilea DW, Tyrrell J, Da Tan C, Tarran R, Diaz P, Jee J, Knoell D, Boyaka PN, Cormet-Boyaka E. Accumulation of metals in GOLD4 COPD lungs is associated with decreased CFTR levels. Respir Res 2014; 15:69. [PMID: 24957904 PMCID: PMC4106203 DOI: 10.1186/1465-9921-15-69] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 06/16/2014] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The Cystic Fibrosis Transmembrane conductance Regulator (CFTR) is a chloride channel that primarily resides in airway epithelial cells. Decreased CFTR expression and/or function lead to impaired airway surface liquid (ASL) volume homeostasis, resulting in accumulation of mucus, reduced clearance of bacteria, and chronic infection and inflammation. METHODS Expression of CFTR and the cigarette smoke metal content were assessed in lung samples of controls and COPD patients with established GOLD stage 4. CFTR protein and mRNA were quantified by immunohistochemistry and quantitative RT-PCR, respectively. Metals present in lung samples were quantified by ICP-AES. The effect of cigarette smoke on down-regulation of CFTR expression and function was assessed using primary human airway epithelial cells. The role of leading metal(s) found in lung samples of GOLD 4 COPD patients involved in the alteration of CFTR was confirmed by exposing human bronchial epithelial cells 16HBE14o- to metal-depleted cigarette smoke extracts. RESULTS We found that CFTR expression is reduced in the lungs of GOLD 4 COPD patients, especially in bronchial epithelial cells. Assessment of metals present in lung samples revealed that cadmium and manganese were significantly higher in GOLD 4 COPD patients when compared to control smokers (GOLD 0). Primary human airway epithelial cells exposed to cigarette smoke resulted in decreased expression of CFTR protein and reduced airway surface liquid height. 16HBE14o-cells exposed to cigarette smoke also exhibited reduced levels of CFTR protein and mRNA. Removal and/or addition of metals to cigarette smoke extracts before exposure established their role in decrease of CFTR in airway epithelial cells. CONCLUSIONS CFTR expression is reduced in the lungs of patients with severe COPD. This effect is associated with the accumulation of cadmium and manganese suggesting a role for these metals in the pathogenesis of COPD.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Estelle Cormet-Boyaka
- Department of Veterinary Biosciences, The Ohio State University, 1925 Coffey Road, Columbus, OH 43210, USA.
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Fung EB, Kwiatkowski JL, Huang JN, Gildengorin G, King JC, Vichinsky EP. Zinc supplementation improves bone density in patients with thalassemia: a double-blind, randomized, placebo-controlled trial. Am J Clin Nutr 2013; 98:960-71. [PMID: 23945720 PMCID: PMC3778866 DOI: 10.3945/ajcn.112.049221] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 07/17/2013] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Patients with thalassemia major (Thal) frequently have low plasma zinc, which has been associated with low bone mass. OBJECTIVE The objective was to determine the effect of zinc supplementation on bone mass in patients with Thal. DESIGN Forty-two subjects (21 females aged 10-30 y) with Thal and low bone mass were randomly assigned to receive 25 mg Zn/d or placebo. Bone mineral content (BMC) and areal bone mineral density (aBMD) were assessed by using dual-energy X-ray absorptiometry, and fasting blood was collected for the measurement of plasma zinc at 0, 12, and 18 mo. RESULTS Thirty-two subjects, 81% of whom were transfusion dependent, completed the study (mean ± SD: 17.1 ± 5.2 y). Plasma zinc was ≤70 μg/dL in 11 subjects at baseline and increased significantly with zinc supplementation (P = 0.014). Use of intention-to-treat analysis and linear models for longitudinal data, adjusted for baseline and pubertal stage, showed that the zinc group had significantly greater increases in whole-body BMC (adjusted mean ± SE: 63 ± 15 g; P = 0.02), and aBMD (0.023 ± 0.006 g/cm(2); P = 0.04) than did the placebo group after 18 mo. Furthermore, adjusted spine and hip aBMD z scores each decreased by 0.3 SDs (both P = 0.04) in the placebo compared with the zinc group over the 18-mo study. CONCLUSIONS In young patients with Thal, zinc supplementation resulted in greater gains in total-body bone mass than did placebo. Zinc was well tolerated and is worthy of investigation in larger trials in Thal patients across a range of ages and disease severity. This trial was registered at clinicaltrials.gov as NCT00459732.
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Affiliation(s)
- Ellen B Fung
- Departments of Hematology at the Children's Hospital & Research Center, Oakland, CA and the Children's Hospital Oakland Research Institute, Oakland, CA
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Dadgar S, Ramjan Z, Floriano WB. Paclitaxel is an inhibitor and its boron dipyrromethene derivative is a fluorescent recognition agent for botulinum neurotoxin subtype A. J Med Chem 2013; 56:2791-803. [PMID: 23484537 DOI: 10.1021/jm301829h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We have successfully identified one new inhibitor and one new fluorescent recognition agent for the botulinum neurotoxin subtype A (BoNT/A) using the virtual screening protocol "protein scanning with virtual ligand screening" (PSVLS). Hit selection used an in-house developed holistic binding scoring method. Selected hits were tested experimentally for inhibitory activity using fluorescence resonance energy transfer (FRET) assays against the light chain (catalytic domain) of BoNT/A. Ligand binding was determined against the light and heavy chain BoNT/A complex through either radiolabeled ligand binding assays (nonfluorescent ligands) or fluorescence intensity assays (fluorescent ligands). These experimental assays have confirmed one compound (paclitaxel) to inhibit BoNT/A's proteolytic activity experimentally with an IC50 of 5.2 μM. A fluorescent derivative was also confirmed to bind to the toxin and therefore is a suitable candidate for the rational design of new detection agents and for the development of fluorescence-based multiprobe detection assays.
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Affiliation(s)
- Saedeh Dadgar
- Department of Chemistry, Lakehead University and Thunder Bay Regional Research Institute, Thunder Bay, Ontario P7B 5E1, Canada
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Kolenko V, Teper E, Kutikov A, Uzzo R. Zinc and zinc transporters in prostate carcinogenesis. Nat Rev Urol 2013; 10:219-26. [PMID: 23478540 DOI: 10.1038/nrurol.2013.43] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The healthy human prostate accumulates the highest level of zinc of any soft tissue in the body. This unique property is retained in BPH, but is lost in prostatic malignancy, which implicates changes in zinc and its transporters in carcinogenesis. Indeed, zinc concentrations diminish early in the course of prostate carcinogenesis, preceding histopathological changes, and continue to decline during progression toward castration-resistant disease. Numerous studies suggest that increased zinc intake might protect against progression of prostatic malignancy. In spite of increased dietary intake, zinc accumulation might be limited by the diminished expression of zinc uptake transporters, resulting in decreased intratumoural zinc levels. This finding can explain the conflicting results of various epidemiological studies evaluating the role of zinc supplementation on primary and secondary prostate cancer prevention. Overall, more research into the mechanisms of zinc homeostasis are needed to fully understand its impact on prostate carcinogenesis. Only then can the potential of zinc and zinc transport proteins be harnessed in the diagnosis and treatment of men with prostate cancer.
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Affiliation(s)
- Vladimir Kolenko
- Fox Chase Cancer Center, Department of Surgical Oncology, Philadelphia, PA 19111-2497, USA.
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Karimi G, Shahar S, Homayouni N, Rajikan R, Bakar NFA, Othman MS. Association between Trace Element and Heavy Metal Levels in Hair and Nail with Prostate Cancer. Asian Pac J Cancer Prev 2012; 13:4249-53. [DOI: 10.7314/apjcp.2012.13.9.4249] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
PURPOSE OF REVIEW To summarize the recent findings related to the functions of zinc in prostate cancer prevention. RECENT FINDINGS The prostate contains the highest concentration of zinc of all the soft tissues, but concentrations decrease significantly during prostate cancer. A growing body of experimental evidence supports the notion that high zinc levels are essential for prostate health and may limit prostate cancer development. The possible mechanisms include the effects of zinc on the inhibition of terminal oxidation, induction of mitochondrial apoptogenesis and suppression of NF-kappaB activity. Zinc may also play an important role in the maintenance of DNA integrity in normal prostate epithelial cells by modulating DNA repair and damage response proteins, especially p53. In addition, recent findings support the role of zinc transporters as tumor suppressors in the prostate. SUMMARY Although epidemiological studies have shown mixed results, the experimental data strongly suggest a protective role of zinc in the prostate. More in-vivo studies on the effects of zinc on prostate functions are necessary to more clearly delineate the interaction between zinc and prostate function. In humans, sensitive and specific zinc biomarkers significantly impair the ability to design and interpret clinical studies and should be a priority area of research.
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Affiliation(s)
- Emily Ho
- Department of Nutrition and Exercise Science, Linus Pauling Institute, Oregon State University, 103 Milam Hall, Corvallis, Oregon 97330, USA.
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Magnesium deficiency accelerates cellular senescence in cultured human fibroblasts. Proc Natl Acad Sci U S A 2008; 105:5768-73. [PMID: 18391207 DOI: 10.1073/pnas.0712401105] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Magnesium inadequacy affects more than half of the U.S. population and is associated with increased risk for many age-related diseases, yet the underlying mechanisms are unknown. Altered cellular physiology has been demonstrated after acute exposure to severe magnesium deficiency, but few reports have addressed the consequences of long-term exposure to moderate magnesium deficiency in human cells. Therefore, IMR-90 human fibroblasts were continuously cultured in magnesium-deficient conditions to determine the long-term effects on the cells. These fibroblasts did not demonstrate differences in cellular viability or plating efficiency but did exhibit a decreased replicative lifespan in populations cultured in magnesium-deficient compared with standard media conditions, both at ambient (20% O(2)) and physiological (5% O(2)) oxygen tension. The growth rates for immortalized IMR-90 fibroblasts were not affected under the same conditions. IMR-90 fibroblast populations cultured in magnesium-deficient conditions had increased senescence-associated beta-galactosidase activity and increased p16(INK4a) and p21(WAF1) protein expression compared with cultures from standard media conditions. Telomere attrition was also accelerated in cell populations from magnesium-deficient cultures. Thus, the long-term consequence of inadequate magnesium availability in human fibroblast cultures was accelerated cellular senescence, which may be a mechanism through which chronic magnesium inadequacy could promote or exacerbate age-related disease.
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