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Nour El-Din HT, Elsebaie MM, Abutaleb NS, Kotb AM, Attia AS, Seleem MN, Mayhoub AS. Expanding the structure-activity relationships of alkynyl diphenylurea scaffold as promising antibacterial agents. RSC Med Chem 2023; 14:367-377. [PMID: 36846365 PMCID: PMC9945853 DOI: 10.1039/d2md00351a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 11/25/2022] [Indexed: 12/02/2022] Open
Abstract
With the continuous and alarming threat of exhausting the current antimicrobial arsenals, efforts are urgently needed to develop new effective ones. In this study, the antibacterial efficacy of a set of structurally related acetylenic-diphenylurea derivatives carrying the aminoguanidine moiety was tested against a panel of multidrug-resistant Gram-positive clinical isolates. Compound 18 was identified with a superior bacteriological profile than the lead compound I. Compound 18 demonstrated an excellent antibacterial profile in vitro: low MIC values, extended post-antibiotic effect, refractory ability to resistance development upon extended repeated exposure, and high tolerability towards mammalian cells. Finally, when assessed in a MRSA skin infection animal model, compound 18 showed considerable healing and less inflammation, decrease in the bacterial loads in skin lesions, and it surpassed fusidic acid in controlling the systemic dissemination of S. aureus. Collectively, compound 18 represents a promising lead anti-MRSA agent that merits further investigation for the development of new anti-staphylococcal therapeutics.
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Affiliation(s)
- Hanzada T Nour El-Din
- Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University Cairo 11562 Egypt
| | - Mohamed M Elsebaie
- Department of Pharmaceutical Organic Chemistry, College of Pharmacy, Al-Azhar University Cairo 11884 Egypt
| | - Nader S Abutaleb
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University Blacksburg Virginia 24061 USA
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University Zagazig 44519 Egypt
| | - Ahmed M Kotb
- Department of Pharmaceutical Organic Chemistry, College of Pharmacy, Al-Azhar University Cairo 11884 Egypt
| | - Ahmed S Attia
- Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University Cairo 11562 Egypt
- Department of Microbiology and Immunology, School of Pharmacy, Newgiza University Giza Egypt
| | - Mohamed N Seleem
- Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Polytechnic Institute and State University Blacksburg Virginia 24061 USA
- Center for One Health Research, Virginia Polytechnic Institute and State University Blacksburg Virginia 24061 USA
| | - Abdelrahman S Mayhoub
- Department of Pharmaceutical Organic Chemistry, College of Pharmacy, Al-Azhar University Cairo 11884 Egypt
- Nanoscience Program, University of Science and Technology, Zewail City of Science and Technology Giza Egypt
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2
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Müller-Deile J, Sarau G, Kotb AM, Jaremenko C, Rolle-Kampczyk UE, Daniel C, Kalkhof S, Christiansen SH, Schiffer M. Author Correction: Novel diagnostic and therapeutic techniques reveal changed metabolic profiles in recurrent focal segmental glomerulosclerosis. Sci Rep 2021; 11:10693. [PMID: 34001993 PMCID: PMC8129082 DOI: 10.1038/s41598-021-89610-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Affiliation(s)
- Janina Müller-Deile
- Department of Nephrology and Hypertension, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany.
| | - George Sarau
- Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Germany.,Leuchs Emeritus Group, Max Planck Institute for the Science of Light, Erlangen, Germany.,Institute for Nanotechnology and Correlative Microscopy eV INAM, Forchheim, Germany
| | - Ahmed M Kotb
- Department of Nephrology and Hypertension, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany.,Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Asyût, Egypt
| | - Christian Jaremenko
- Institute for Nanotechnology and Correlative Microscopy eV INAM, Forchheim, Germany.,Institute of Optics, Information and Photonics, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany
| | - Ulrike E Rolle-Kampczyk
- Department Molecular Systems Biology, Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - Christoph Daniel
- Department of Nephropathology, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany
| | - Stefan Kalkhof
- Institute for Bioanalysis, University of Applied Sciences Coburg, Coburg, Germany.,Department of Molecular Systems Biology, Helmholtz-Centre for Environmental Research-UFZ, Leipzig, Germany
| | - Silke H Christiansen
- Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Germany.,Leuchs Emeritus Group, Max Planck Institute for the Science of Light, Erlangen, Germany.,Institute for Nanotechnology and Correlative Microscopy eV INAM, Forchheim, Germany.,Physics Department, Freie Universität Berlin, Berlin, Germany
| | - Mario Schiffer
- Department of Nephrology and Hypertension, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany
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3
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Müller-Deile J, Sarau G, Kotb AM, Jaremenko C, Rolle-Kampczyk UE, Daniel C, Kalkhof S, Christiansen SH, Schiffer M. Novel diagnostic and therapeutic techniques reveal changed metabolic profiles in recurrent focal segmental glomerulosclerosis. Sci Rep 2021; 11:4577. [PMID: 33633212 PMCID: PMC7907124 DOI: 10.1038/s41598-021-83883-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 02/09/2021] [Indexed: 12/19/2022] Open
Abstract
Idiopathic forms of Focal Segmental Glomerulosclerosis (FSGS) are caused by circulating permeability factors, which can lead to early recurrence of FSGS and kidney failure after kidney transplantation. In the past three decades, many research endeavors were undertaken to identify these unknown factors. Even though some potential candidates have been recently discussed in the literature, "the" actual factor remains elusive. Therefore, there is an increased demand in FSGS research for the use of novel technologies that allow us to study FSGS from a yet unexplored angle. Here, we report the successful treatment of recurrent FSGS in a patient after living-related kidney transplantation by removal of circulating factors with CytoSorb apheresis. Interestingly, the classical published circulating factors were all in normal range in this patient but early disease recurrence in the transplant kidney and immediate response to CytoSorb apheresis were still suggestive for pathogenic circulating factors. To proof the functional effects of the patient's serum on podocytes and the glomerular filtration barrier we used a podocyte cell culture model and a proteinuria model in zebrafish to detect pathogenic effects on the podocytes actin cytoskeleton inducing a functional phenotype and podocyte effacement. We then performed Raman spectroscopy in the < 50 kDa serum fraction, on cultured podocytes treated with the FSGS serum and in kidney biopsies of the same patient at the time of transplantation and at the time of disease recurrence. The analysis revealed changes in podocyte metabolome induced by the FSGS serum as well as in focal glomerular and parietal epithelial cell regions in the FSGS biopsy. Several altered Raman spectra were identified in the fractionated serum and metabolome analysis by mass spectrometry detected lipid profiles in the FSGS serum, which were supported by disturbances in the Raman spectra. Our novel innovative analysis reveals changed lipid metabolome profiles associated with idiopathic FSGS that might reflect a new subtype of the disease.
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Affiliation(s)
- Janina Müller-Deile
- Department of Nephrology and Hypertension, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany.
| | - George Sarau
- Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Germany.,Leuchs Emeritus Group, Max Planck Institute for the Science of Light, Erlangen, Germany.,Institute for Nanotechnology and Correlative Microscopy eV INAM, Forchheim, Germany
| | - Ahmed M Kotb
- Department of Nephrology and Hypertension, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany.,Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Asyût, Egypt
| | - Christian Jaremenko
- Institute for Nanotechnology and Correlative Microscopy eV INAM, Forchheim, Germany.,Institute of Optics, Information and Photonics, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany
| | - Ulrike E Rolle-Kampczyk
- Department Molecular Systems Biology, Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - Christoph Daniel
- Department of Nephropathology, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany
| | - Stefan Kalkhof
- Institute for Bioanalysis, University of Applied Sciences Coburg, Coburg, Germany.,Department of Molecular Systems Biology, Helmholtz-Centre for Environmental Research-UFZ, Leipzig, Germany
| | - Silke H Christiansen
- Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Germany.,Leuchs Emeritus Group, Max Planck Institute for the Science of Light, Erlangen, Germany.,Institute for Nanotechnology and Correlative Microscopy eV INAM, Forchheim, Germany.,Physics Department, Freie Universität Berlin, Berlin, Germany
| | - Mario Schiffer
- Department of Nephrology and Hypertension, Friedrich-Alexander-University (FAU) Erlangen-Nuremberg, Erlangen, Germany
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Sayed AEDH, Kotb AM, Oda S, Kashiwada S, Mitani H. Protective effect of p53 knockout on 4-nonylphenol-induced nephrotoxicity in medaka (Oryzias latipes). Chemosphere 2019; 236:124314. [PMID: 31310970 DOI: 10.1016/j.chemosphere.2019.07.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 02/07/2023]
Abstract
In the past few decades, environmental pollutants have become common because of misused nonionic surfactants and detergents. Nonylphenol ethoxylates (NPs) are one of the most important contaminants of water. Therefore, the present study aimed to investigate the protective blocking effect of apoptosis (deficient P53 gene) on 4-nonylphenol (4-NP)-induced nephrotoxicity of medaka (Oryzias latipes). We divided 36 fish into six groups: two different control groups of wild type (Wt; Hd-rR) control and p53 (-/-) control, and four different treated with 4-nonylphenol (50 μg/L and 100 μg/L) for 15 days. Histology, immunochemistry, and TUNEL assays confirmed that 4-NP causes nephrotoxicity. Our results showed that 4-NP administration significantly disturbed the kidney structure and function and 4-NP-treated fish showed dilated glomerular vessels, had less glomerular cellular content, decreased expression of glomerular proteins, and an increased level of apoptosis compared with a Wt control group (P < 0.05). As p53 is an apoptotic inducer, some protection in p53-deficient medaka was found as nephrotoxic effects of 4-NP were minimized significantly. Our study demonstrated for the first time to our knowledge that 4-NP induces apoptosis, causing nephrotoxicity in medaka. We found that blocking apoptosis blocking was able to protect the kidney from the toxic effects of 4-NP.
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Affiliation(s)
- Alaa El-Din H Sayed
- Zoology Department, Faculty of Science, Assiut University, 71516, Assiut, Egypt.
| | - Ahmed M Kotb
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, 71516 Assiut, Egypt
| | - Shoji Oda
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8562, Japan
| | - Shosaku Kashiwada
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura, Gunma 374-0193, Japan
| | - Hiroshi Mitani
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8562, Japan
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5
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Saleh A, Anwar MM, Zayed AE, Ezz Eldeen MES, Afifi G, Alnashiri HM, Gomaa AMS, Abd-Elkareem M, Abou-Elhamd AS, Shaheen ES, Mohamed GA, Hetta HF, Kotb AM. Impact of Ginkgo biloba extract and magnetized water on the survival rate and functional capabilities of pancreatic β-cells in type 2 diabetic rat model. Diabetes Metab Syndr Obes 2019; 12:1339-1347. [PMID: 31496771 PMCID: PMC6689767 DOI: 10.2147/dmso.s209856] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Accepted: 07/16/2019] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Type 2 diabetes (T2D) is a widely distributed disease that affects large population worldwide. This study aimed to verify the role of Ginkgo biloba (GB) extract and magnetized water (MW) on the survival rate and functional capabilities of pancreatic β-cells in type 2 diabetic rats. MATERIALS AND METHODS T2D was induced by feeding the rats on a high-fat diet (20% fat, 45% carbohydrate, 22% protein) for eight weeks followed by intra-peritoneal injection of a single low dose of streptozotocin (25mg/Kg). Forty rats were randomly assigned to four groups (n=10 rats) as follows: non treated control and three diabetic groups. One diabetic group served as a positive control (diabetic), while the other two groups were orally administered with water extract of GB leaves (0.11 g/kg/day) and MW (600 gauss) for four weeks, respectively. RESULTS The β-cell mass and insulin expression in these cells increased markedly after both treatments, particularly in GB treated group. In addition, the immune-expression of the two antioxidant enzymes; glutathione and superoxide dismutase 2 (SOD2) in the pancreatic tissue demonstrated a down-regulation in GB and MW treated groups as compared with the diabetic group. CONCLUSION A four-week treatment of GB and MW protected pancreatic β-cell cells and improved their insulin expression and antioxidant status in type 2 diabetic rats.
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Affiliation(s)
- Ahmed Saleh
- Department of Physics, Faculty of Science, Jazan University, Jazan, KSA
- Exploratory Center of Science and Technology
, Cairo, Egypt
| | - Mamdouh M Anwar
- Department of Pharmacology, Faculty of Pharmacy, Jazan University, Jazan, KSA
- Medical Physiology Department, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Ahmed E Zayed
- Department of Biology, Faculty of Science, Jazan University, Jazan, KSA
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Egypt
| | - Manal El Sayed Ezz Eldeen
- Endocrine Unit, Department of Internal Medicine, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Gamal Afifi
- Department of Physics, Faculty of Science, Jazan University, Jazan, KSA
- National Institute for Laser Enhanced Sciences, Cairo University
, Giza, Egypt
| | | | - Asmaa MS Gomaa
- Medical Physiology Department, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Mahmoud Abd-Elkareem
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Egypt
| | - Alaa Sayed Abou-Elhamd
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Egypt
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
| | | | - Ghada A Mohamed
- Endocrine Unit, Department of Internal Medicine, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Helal F Hetta
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
- Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Correspondence: Helal F HettaDepartment of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, 231 Albert B. Sabin Way, PO Box 670595, OH45267-0595, USAEmail
| | - Ahmed M Kotb
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Egypt
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6
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Endlich N, Lange T, Kuhn J, Klemm P, Kotb AM, Siegerist F, Kindt F, Lindenmeyer MT, Cohen CD, Kuss AW, Nath N, Rettig R, Lendeckel U, Zimmermann U, Amann K, Stracke S, Endlich K. BDNF: mRNA expression in urine cells of patients with chronic kidney disease and its role in kidney function. J Cell Mol Med 2018; 22:5265-5277. [PMID: 30133147 PMCID: PMC6201371 DOI: 10.1111/jcmm.13762] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 05/30/2018] [Indexed: 12/21/2022] Open
Abstract
Podocyte loss and changes to the complex morphology are major causes of chronic kidney disease (CKD). As the incidence is continuously increasing over the last decades without sufficient treatment, it is important to find predicting biomarkers. Therefore, we measured urinary mRNA levels of podocyte genes NPHS1, NPHS2, PODXL and BDNF, KIM‐1, CTSL by qRT‐PCR of 120 CKD patients. We showed a strong correlation between BDNF and the kidney injury marker KIM‐1, which were also correlated with NPHS1, suggesting podocytes as a contributing source. In human biopsies, BDNF was localized in the cell body and major processes of podocytes. In glomeruli of diabetic nephropathy patients, we found a strong BDNF signal in the remaining podocytes. An inhibition of the BDNF receptor TrkB resulted in enhanced podocyte dedifferentiation. The knockdown of the orthologue resulted in pericardial oedema formation and lowered viability of zebrafish larvae. We found an enlarged Bowman's space, dilated glomerular capillaries, podocyte loss and an impaired glomerular filtration. We demonstrated that BDNF is essential for glomerular development, morphology and function and the expression of BDNF and KIM‐1 is highly correlated in urine cells of CKD patients. Therefore, BDNF mRNA in urine cells could serve as a potential CKD biomarker.
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Affiliation(s)
- Nicole Endlich
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Tim Lange
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Jana Kuhn
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany.,Clinic for Diabetes and Metabolic Diseases, Karlsburg Hospital Dr. Guth GmbH & Co KG, Karlsburg, Germany
| | - Paul Klemm
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Ahmed M Kotb
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Florian Siegerist
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Frances Kindt
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Maja T Lindenmeyer
- Nephrological Center, Medical Clinic and Policlinic IV, University of Munich, Munich, Germany
| | - Clemens D Cohen
- Nephrological Center, Medical Clinic and Policlinic IV, University of Munich, Munich, Germany
| | - Andreas W Kuss
- Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Neetika Nath
- Institute of Bioinformatics, University of Greifswald, Greifswald, Germany
| | - Rainer Rettig
- Department of Physiology, University of Greifswald, Karlsburg, Germany
| | - Uwe Lendeckel
- Department of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, Greifswald, Germany
| | - Uwe Zimmermann
- Department of Urology, University Medicine Greifswald, Greifswald, Germany
| | - Kerstin Amann
- Department of Pathology, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Sylvia Stracke
- Department of Internal Medicine A, University Medicine Greifswald, Greifswald, Germany
| | - Karlhans Endlich
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
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Aly FM, Kotb AM, Haridy MAM, Hammad S. Impacts of fullerene C 60 and virgin olive oil on cadmium-induced genotoxicity in rats. Sci Total Environ 2018; 630:750-756. [PMID: 29499533 DOI: 10.1016/j.scitotenv.2018.02.205] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 01/29/2018] [Accepted: 02/17/2018] [Indexed: 06/08/2023]
Abstract
Currently, cadmium is considered to be one of the major environmental pollutants. Environmentally, cadmium is released in various forms e.g. oxide, chloride and sulphide. The aim of the present study was to examine the genotoxic impact of fullerene nanoparticles C60 (C60) and virgin olive oil (VOO) on cadmium chloride (CdCl2)-induced genotoxicity in rats. To evaluate these effects on DNA damage and chromosomal frequency, 25 albino rats were randomly assigned to 5 groups (n=5 per group): Group 1 served as a control; Group 2 received a single intraperitoneal dose of CdCl2 (3.5mg/kg); Group 3 animals were treated with C60 (4mg/kg, orally) every other day for 20days; Group 4 received a single intraperitoneal dose of CdCl2 (3.5mg/kg) and an oral dose of C60 (4mg/kg); and Group 5 received a single intraperitoneal dose of CdCl2 (3.5mg/kg) and oral doses of VOO every other day for 20 consecutive days. Genotoxic and anti-genotoxic effects of C60 and VOO were evaluated in the liver, kidney and bone marrow using molecular and cytogenetic assays. As expected, CdCl2 and C60 administration was associated with band number alterations in both liver and kidney; however, C60 pretreatment recovered to approximately basal number. Surprisingly, C60 and VOO significantly attenuated the genotoxic effects caused by CdCl2 in livers and kidneys. In bone marrow, in addition to a reduction in the chromosomal number, several chromosomal aberrations were caused by CdCl2. These chromosomal alterations were also reversed by C60 and VOO. In conclusion, molecular and cytogenetic studies showed that C60 and VOO exhibit anti-genotoxic agents against CdCl2-induced genotoxicity in rats. Further studies are needed to investigate the optimal conditions for potential biomedical applications of these anti-genotoxic agents.
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Affiliation(s)
- Fayza M Aly
- Zoology Department, Faculty of Science, South Valley University, 83523-Qena, Egypt
| | - Ahmed M Kotb
- Department of Anatomy and Histology, Assiut University, Faculty of Veterinary Medicine, 71515-Assiut, Egypt
| | - Mohie A M Haridy
- Department of Pathology & Clinical Pathology, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt
| | - Seddik Hammad
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, South Valley University, 83523-Qena, Egypt; Molecular Hepatology Section, Department of Medicine II, Medical Faculty, Mannheim Heidelberg University, 68167-Mannheim, Germany.
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8
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Kotb AM, Abd-Elkareem M, Abou Khalil NS, Sayed AEDH. Protective effect of Nigella sativa on 4-nonylphenol-induced nephrotoxicity in Clarias gariepinus (Burchell, 1822). Sci Total Environ 2018; 619-620:692-699. [PMID: 29156287 DOI: 10.1016/j.scitotenv.2017.11.131] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 10/26/2017] [Accepted: 11/11/2017] [Indexed: 02/07/2023]
Abstract
The aim of this study was to examine the protective effects of Nigella sativa (N. sativa) on 4-Nonylphenol-induced nephrotoxicity in Clarias gariepinus. 30 fishes were divided into five groups: control, 4-nonylphenol-treated, 1% N. sativa treated, 2.5% N. sativa treated, and 5% N. sativa treated. N. sativa and 4-Nonylphenol were given for 3weeks. 4-NP and 4-NP-N. sativa treated fishes were compared with the control group. Kidney histology, immunochemistry, and electron microscope were assessed after 4-NP exposure. In the African catfish, 4-NP is mainly excreted through the kidney causing nephrotoxicity. Our results showed that 4-NP administration significantly disturbed the kidney structure and function. 4-NP treated fishes showed dilated glomerular vessels, fewer glomerular cells content, decreased expressions of glomerular proteins, and increased level of autophagy compared to control group (P<0.05). As N. sativa has different immunological and pharmacological effects such as anti-apoptotic and anti-oxidant, therefore, the administration of N. sativa with 4-Nonylphenol significantly minimize the nephrotoxic effect of 4-NP and maintain the normal kidney structure and function. Our novel study demonstrated for the first time that N. sativa could protect the kidney against 4-NP induced-nephrotoxicity.
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Affiliation(s)
- Ahmed M Kotb
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, 71516 Assiut, Egypt
| | - Mahmoud Abd-Elkareem
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, 71516 Assiut, Egypt
| | - Nasser S Abou Khalil
- Medical Physiology Department, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Alaa El-Din H Sayed
- Zoology department, Faculty of Science, Assiut University, 71516 Assiut, Egypt; Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8562, Japan.
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9
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Aly FM, Kotb AM, Hammad S. Effects of Spirulina platensis on DNA damage and chromosomal aberration against cadmium chloride-induced genotoxicity in rats. Environ Sci Pollut Res Int 2018; 25:10829-10836. [PMID: 29397502 DOI: 10.1007/s11356-018-1329-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 01/17/2018] [Indexed: 06/07/2023]
Abstract
Todays, bioactive compounds extracted from Spirulina platensis have been intensively studied for their therapeutical values. Therefore, in the present study, we aimed to evaluate the effects of S. platensis extract on DNA damage and chromosomal aberrations induced by cadmium in rats. Four groups of male albino rats (n = 7 rats) were used. The first group served as a control group and received distilled water. The second group was exposed intraperitoneally to cadmium chloride (CdCl2) (3.5 mg/kg body weight dissolved in 2 ml distilled water). The third group included the rats that were orally treated with S. platensis extract (1 g/kg dissolved in 5 ml distilled water, every other day for 30 days). The fourth group included the rats that were intraperitoneally and orally exposed to cadmium chloride and S. platensis, respectively. The experiment in all groups was extended for 60 days. The results of cadmium-mediated toxicity revealed significant genetic effects (DNA fragmentation, deletion or disappearance of some base pairs of DNA, and appearance of few base pairs according to ISSR-PCR analysis). Moreover, chromosomes showed structural aberrations such as reduction of chromosomal number, chromosomal ring, chromatid deletions, chromosomal fragmentations, and dicentric chromosomes. Surprisingly, S. platensis extract plus CdCl2-treated group showed less genetic effects compared with CdCl2 alone. Further, S. platensis extract upon CdCl2 toxicity was associated with less chromosomal aberration number and nearly normal appearance of DNA fragments as indicated by the bone marrow and ISSR-PCR analysis, respectively. In conclusion, the present novel study showed that co-treatment with S. platensis extract could reduce the genotoxic effects of CdCl2 in rats.
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Affiliation(s)
- Fayza M Aly
- Zoology Department, Faculty of Science, South Valley University, Qena, 83523, Egypt
| | - Ahmed M Kotb
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Friedrich-Loeffler-Str. 23c, 17487, Greifswald, Germany.
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, 71515, Egypt.
| | - Seddik Hammad
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena, 83523, Egypt
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10
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Endlich N, Kliewe F, Kindt F, Schmidt K, Kotb AM, Artelt N, Lindenmeyer MT, Cohen CD, Döring F, Kuss AW, Amann K, Moeller MJ, Kabgani N, Blumenthal A, Endlich K. The transcription factor Dach1 is essential for podocyte function. J Cell Mol Med 2018; 22:2656-2669. [PMID: 29498212 PMCID: PMC5908116 DOI: 10.1111/jcmm.13544] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 12/24/2017] [Indexed: 12/27/2022] Open
Abstract
Dedifferentiation and loss of podocytes are the major cause of chronic kidney disease. Dach1, a transcription factor that is essential for cell fate, was found in genome‐wide association studies to be associated with the glomerular filtration rate. We found that podocytes express high levels of Dach1 in vivo and to a much lower extent in vitro. Parietal epithelial cells (PECs) that are still under debate to be a type of progenitor cell for podocytes expressed Dach1 only at low levels. The transfection of PECs with a plasmid encoding for Dach1 induced the expression of synaptopodin, a podocyte‐specific protein, demonstrated by immunocytochemistry and Western blot. Furthermore, synaptopodin was located along actin fibres in a punctate pattern in Dach1‐expressing PECs comparable with differentiated podocytes. Moreover, dedifferentiating podocytes of isolated glomeruli showed a significant reduction in the expression of Dach1 together with synaptopodin after 9 days in cell culture. To study the role of Dach1 in vivo, we used the zebrafish larva as an animal model. Knockdown of the zebrafish ortholog Dachd by morpholino injection into fertilized eggs resulted in a severe renal phenotype. The glomeruli of the zebrafish larvae showed morphological changes of the glomerulus accompanied by down‐regulation of nephrin and leakage of the filtration barrier. Interestingly, glomeruli of biopsies from patients suffering from diabetic nephropathy showed also a significant reduction of Dach1 and synaptopodin in contrast to control biopsies. Taken together, Dach1 is a transcription factor that is important for podocyte differentiation and proper kidney function.
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Affiliation(s)
- Nicole Endlich
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Felix Kliewe
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Frances Kindt
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Katharina Schmidt
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Ahmed M Kotb
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany.,Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | - Nadine Artelt
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Maja T Lindenmeyer
- Nephrological Center, Medical Clinic and Policlinic IV, University of Munich, Munich, Germany
| | - Clemens D Cohen
- Nephrological Center, Medical Clinic and Policlinic IV, University of Munich, Munich, Germany
| | - Franziska Döring
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Andreas W Kuss
- Department of Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Kerstin Amann
- Department of Nephropathology, Institute of Pathology, University Hospital Erlangen, Erlangen, Germany
| | - Marcus J Moeller
- Department of Internal Medicine II, Nephrology and Clinical Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Nazanin Kabgani
- Department of Internal Medicine II, Nephrology and Clinical Immunology, RWTH Aachen University Hospital, Aachen, Germany
| | - Antje Blumenthal
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Karlhans Endlich
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
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11
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Tomas NM, Meyer-Schwesinger C, von Spiegel H, Kotb AM, Zahner G, Hoxha E, Helmchen U, Endlich N, Koch-Nolte F, Stahl RAK. A Heterologous Model of Thrombospondin Type 1 Domain-Containing 7A-Associated Membranous Nephropathy. J Am Soc Nephrol 2017; 28:3262-3277. [PMID: 28814510 DOI: 10.1681/asn.2017010030] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 05/25/2017] [Indexed: 11/03/2022] Open
Abstract
Thrombospondin type 1 domain-containing 7A (THSD7A) is a target for autoimmunity in patients with membranous nephropathy (MN). Circulating autoantibodies from patients with THSD7A-associated MN have been demonstrated to cause MN in mice. However, THSD7A-associated MN is a rare disease, preventing the use of patient antibodies for larger experimental procedures. Therefore, we generated antibodies against the human and mouse orthologs of THSD7A in rabbits by coimmunization with the respective cDNAs. Injection of these anti-THSD7A antibodies into mice induced a severe nephrotic syndrome with proteinuria, weight gain, and hyperlipidemia. Immunofluorescence analyses revealed granular antigen-antibody complexes in a subepithelial location along the glomerular filtration barrier 14 days after antibody injection, and immunohistochemistry for rabbit IgG and THSD7A as well as ultrastructural analyses showed the typical characteristics of human MN. Mice injected with purified IgG from rabbit serum that was taken before immunization failed to develop any of these changes. Notably, MN developed in the absence of detectable complement activation, and disease was strain dependent. In vitro, anti-THSD7A antibodies caused cytoskeletal rearrangement and activation of focal adhesion signaling. Knockdown of the THSD7A ortholog, thsd7aa, in zebrafish larvae resulted in altered podocyte differentiation and impaired glomerular filtration barrier function, with development of pericardial edema, suggesting an important role of THSD7A in glomerular filtration barrier integrity. In summary, our study introduces a heterologous mouse model that allows further investigation of the molecular events that underlie MN.
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Affiliation(s)
| | | | | | - Ahmed M Kotb
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany; and.,Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | | | | | | | - Nicole Endlich
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany; and
| | - Friedrich Koch-Nolte
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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12
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Hammad S, Osman GS, Ezzeldien M, Ahmed H, Kotb AM. Highlight report: Predicting late metastasis in breast cancer. EXCLI J 2017; 15:867-869. [PMID: 28275321 PMCID: PMC5341014 DOI: 10.17179/excli2016-843] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 12/19/2016] [Indexed: 01/21/2023]
Affiliation(s)
- Seddik Hammad
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt; Molecular Hepatology - Alcohol Associated Diseases, Department of Medicine II, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Gada S Osman
- Department of Pathology, Faculty of Medicine, South Valley University, Qena, Egypt
| | - Mohamed Ezzeldien
- Department of Physics, Faculty of Science, South Valley University, Qena, Egypt
| | - Hassan Ahmed
- Department of Physiology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Ahmed M Kotb
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany; Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
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13
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Salman MMA, Kotb AM, Haridy MAM, Hammad S. Hepato- and nephroprotective effects of bradykinin potentiating factor from scorpion (Buthus occitanus) venom on mercuric chloride-treated rats. EXCLI J 2016; 15:807-816. [PMID: 28337111 PMCID: PMC5318677 DOI: 10.17179/excli2016-777] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 11/26/2016] [Indexed: 01/24/2023]
Abstract
Bioactive peptides such as bradykinin potentiating factor (BPF), have, anti-oxidative, anti-inflammatory, immunomodulatory and ameliorative effects in chronic diseases and play a potential role in cancer prevention. It is known that the liver and kidney accumulate inorganic mercury upon exposure, which often leads to mercury intoxication in these organs. In this study, we investigated the effect of bradykinin potentiating factor (BPF), a scorpion venom peptide, on mercuric chloride-induced hepatic and renal toxicity in rats. We used 20 adult male Albino rats divided into four equal groups: the first group was injected with saline (control); the second group was administered daily with mercuric chloride (HgCl2) for 2 weeks; the third group was administered with BPF twice weekly for 2 successive weeks, while the fourth group was exposed to BPF followed by HgCl2. We observed that HgCl2 treated rats had a significant increase in serum ALT, AST, ALP, creatinine and urea levels compared to control. Furthermore, HgCl2 treated rats showed a marked decrease in total proteins, albumin and uric acids compared to control. The previously studied parameters were not significantly changed in BPF pretreated rats compared to control. Moreover, a significant decrease in the activities of glutathione perioxidase (GSH), superoxide dismutase (SOD), and catalase (CAT), in addition to a significant increase in the level of malondialdehyde (MDA) were observed in hepatic and renal tissues of rats after HgCl2 treatment. In contrast, the HgCl2/BPF treated rats showed a significant elevation in the activity of GSH, SOD, and CAT accompanied with a significant regression in the level of MDA compared to the HgCl2 exposed rats. We conclude that treatment with BPF is a promising prophylactic approach for the management of mercuric chloride-induced hepato- and nephro-toxicities.
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Affiliation(s)
- Muhammad M A Salman
- Department of Zoology, Faculty of Science, South Valley University, Qena 83523, Egypt
| | - Ahmed M Kotb
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany; Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | - Mohie A M Haridy
- Department of Pathology & Clinical Pathology, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt
| | - Seddik Hammad
- Molecular Hepatology - Alcohol Associated Diseases, Department of Medicine II, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany; Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt
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14
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Thomasova D, Ebrahim M, Fleckinger K, Li M, Molnar J, Popper B, Liapis H, Kotb AM, Siegerist F, Endlich N, Anders HJ. MDM2 prevents spontaneous tubular epithelial cell death and acute kidney injury. Cell Death Dis 2016; 7:e2482. [PMID: 27882940 PMCID: PMC5260907 DOI: 10.1038/cddis.2016.390] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 10/21/2016] [Accepted: 10/25/2016] [Indexed: 12/24/2022]
Abstract
Murine double minute-2 (MDM2) is an E3-ubiquitin ligase and the main negative regulator of tumor suppressor gene p53. MDM2 has also a non-redundant function as a modulator of NF-kB signaling. As such it promotes proliferation and inflammation. MDM2 is highly expressed in the unchallenged tubular epithelial cells and we hypothesized that MDM2 is necessary for their survival and homeostasis. MDM2 knockdown by siRNA or by genetic depletion resulted in demise of tubular cells in vitro. This phenotype was completely rescued by concomitant knockdown of p53, thus suggesting p53 dependency. In vivo experiments in the zebrafish model demonstrated that the tubulus cells of the larvae undergo cell death after the knockdown of mdm2. Doxycycline-induced deletion of MDM2 in tubular cell-specific MDM2-knockout mice Pax8rtTa-cre; MDM2f/f caused acute kidney injury with increased plasma creatinine and blood urea nitrogen and sharp decline of glomerular filtration rate. Histological analysis showed massive swelling of renal tubular cells and later their loss and extensive tubular dilation, markedly in proximal tubules. Ultrastructural changes of tubular epithelial cells included swelling of the cytoplasm and mitochondria with the loss of cristae and their transformation in the vacuoles. The pathological phenotype of the tubular cell-specific MDM2-knockout mouse model was completely rescued by co-deletion of p53. Tubular epithelium compensates only partially for the cell loss caused by MDM2 depletion by proliferation of surviving tubular cells, with incomplete MDM2 deletion, but rather mesenchymal healing occurs. We conclude that MDM2 is a non-redundant survival factor for proximal tubular cells by protecting them from spontaneous p53 overexpression-related cell death.
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Affiliation(s)
- Dana Thomasova
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der LMU München, Munich, Germany
| | - Martrez Ebrahim
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der LMU München, Munich, Germany
| | - Kristina Fleckinger
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der LMU München, Munich, Germany
| | - Moying Li
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der LMU München, Munich, Germany
| | - Jakob Molnar
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der LMU München, Munich, Germany
| | - Bastian Popper
- Department of Anatomy and Cell Biology, Ludwig-Maximilians Universität, Munich, Germany
| | - Helen Liapis
- Pathology & Immunology & Internal Medicine (Renal), Washington University, School of Medicine, St Louis, MO, USA
| | - Ahmed M Kotb
- Department of Anatomy and Cell Biology, Universitätsmedizin Greifswald, Greifswald, Germany
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | - Florian Siegerist
- Department of Anatomy and Cell Biology, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Nicole Endlich
- Department of Anatomy and Cell Biology, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Hans-Joachim Anders
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der LMU München, Munich, Germany
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15
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Hammad S, Mahmoud HYAH, Hamadneh L, Elsherief AM, Meindl-Beinker NM, Kotb AM. Highlight report: pluripotent stem cells in translational research. Arch Toxicol 2016; 90:3145-3146. [PMID: 27743009 DOI: 10.1007/s00204-016-1867-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 10/04/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Seddik Hammad
- Molecular Hepatology - Alcohol Associated Diseases, Department of Medicine II, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany. .,Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt.
| | - Hassan Y A H Mahmoud
- Department of Animal Medicine, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Lama Hamadneh
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, Amman, Jordan
| | | | - Nadja M Meindl-Beinker
- Molecular Hepatology - Alcohol Associated Diseases, Department of Medicine II, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Ahmed M Kotb
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany.,Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
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16
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Kotb AM, Simon O, Blumenthal A, Vogelgesang S, Dombrowski F, Amann K, Zimmermann U, Endlich K, Endlich N. Knockdown of ApoL1 in Zebrafish Larvae Affects the Glomerular Filtration Barrier and the Expression of Nephrin. PLoS One 2016; 11:e0153768. [PMID: 27138898 PMCID: PMC4854397 DOI: 10.1371/journal.pone.0153768] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 04/04/2016] [Indexed: 12/28/2022] Open
Abstract
APOL1, a secreted high-density lipoprotein, is expressed in different human tissues. Genetic variants of APOL1 are described to be associated with the development of end stage renal diseases in African Americans. In human kidney, APOL1 is mainly expressed in podocytes that are responsible for proper blood filtration. Since mice do not express ApoL1, the zebrafish is an ideal model to study the role of ApoL1. Injection of morpholinos against zApoL1 into zebrafish eggs and larvae, respectively, induces severe edema indicating a leakage of the filtration barrier. This was demonstrated in zApoL1 knockdown larvae by intravascular injection of fluorescently-labeled 10- and 500-kDa dextrans and by clearance of the vitamin D-binding protein from the circulation. Immunohistochemistry and RT-PCR revealed the reduction of nephrin, a podocyte-specific protein essential for blood filtration. Coinjection of human nephrin mRNA rescued the zApoL1 knockdown induced phenotype. Reduced APOL1 and nephrin levels were also found in biopsies of patients suffering from end stage renal diseases. Our results demonstrate that zApoL1 is essential for proper blood filtration in the zebrafish glomerulus and that zApoL1 affects the expression of nephrin.
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Affiliation(s)
- Ahmed M Kotb
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany.,Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | - Ole Simon
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Antje Blumenthal
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Silke Vogelgesang
- Institute of Pathology, University Medicine Greifswald, Greifswald, Germany
| | - Frank Dombrowski
- Institute of Pathology, University Medicine Greifswald, Greifswald, Germany
| | - Kerstin Amann
- Department of Nephropathology, Institute of Pathology, University Hospital Erlangen, Erlangen, Germany
| | - Uwe Zimmermann
- Department of Urology, University Medicine Greifswald, Greifswald, Germany
| | - Karlhans Endlich
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Nicole Endlich
- Institute of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
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17
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Thomasova D, Bruns HA, Kretschmer V, Ebrahim M, Romoli S, Liapis H, Kotb AM, Endlich N, Anders HJ. Murine Double Minute-2 Prevents p53-Overactivation-Related Cell Death (Podoptosis) of Podocytes. J Am Soc Nephrol 2014; 26:1513-23. [PMID: 25349197 DOI: 10.1681/asn.2014040345] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 09/22/2014] [Indexed: 12/30/2022] Open
Abstract
Murine double minute-2 (MDM2), an E3 ligase that regulates the cell cycle and inflammation, is highly expressed in podocytes. In podocyte injury, MDM2 drives podocyte loss by mitotic catastrophe, but the function of MDM2 in resting podocytes has not been explored. Here, we investigated the effects of podocyte MDM2 deletion in vitro and in vivo. In vitro, MDM2 knockdown by siRNA caused increased expression of p53 and podocyte death, which was completely rescued by coknockdown of p53. Apoptosis, pyroptosis, pyronecrosis, necroptosis, ferroptosis, and parthanatos were excluded as modes of occurrence for this p53-overactivation-related cell death (here referred to as podoptosis). Podoptosis was associated with cytoplasmic vacuolization, endoplasmic reticulum stress, and dysregulated autophagy (previously described as paraptosis). MDM2 knockdown caused podocyte loss and proteinuria in a zebrafish model, which was consistent with the phenotype of podocyte-specific MDM2-knockout mice that also showed the aforementioned ultrastructual podocyte abnormalities before and during progressive glomerulosclerosis. The phenotype of both animal models was entirely rescued by codeletion of p53. We conclude that MDM2 maintains homeostasis and long-term survival in podocytes by preventing podoptosis, a p53-regulated form of cell death with unspecific features previously classified as paraptosis.
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Affiliation(s)
- Dana Thomasova
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Munich, Germany;
| | - Hauke A Bruns
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Munich, Germany
| | - Victoria Kretschmer
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Munich, Germany
| | - Martrez Ebrahim
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Munich, Germany
| | - Simone Romoli
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Munich, Germany
| | - Helen Liapis
- Pathology, Immunology, and Internal Medicine (Renal), School of Medicine, Washington University, St. Louis, Missouri
| | - Ahmed M Kotb
- Institut für Anatomie und Zellbiologie, Universitätsmedizin Greifswald, Greifswald, Germany; and,Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | - Nicole Endlich
- Institut für Anatomie und Zellbiologie, Universitätsmedizin Greifswald, Greifswald, Germany; and
| | - Hans-Joachim Anders
- Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Munich, Germany
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18
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Kotb AM, Müller T, Xie J, Anand-Apte B, Endlich K, Endlich N. Simultaneous assessment of glomerular filtration and barrier function in live zebrafish. Am J Physiol Renal Physiol 2014; 307:F1427-34. [PMID: 25298528 DOI: 10.1152/ajprenal.00029.2014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The zebrafish pronephros is a well-established model to study glomerular development, structure, and function. A few methods have been described to evaluate glomerular barrier function in zebrafish larvae so far. However, there is a need to assess glomerular filtration as well. In the present study, we extended the available methods by simultaneously measuring the intravascular clearances of Alexa fluor 647-conjugated 10-kDa dextran and FITC-conjugated 500-kDa dextran as indicators of glomerular filtration and barrier function, respectively. After intravascular injection of the dextrans, mean fluorescence intensities of both dextrans were measured in the cardinal vein of living zebrafish (4 days postfertilization) by confocal microscopy over time. We demonstrated that injected 10-kDa dextran was rapidly cleared from the circulation, became visible in the lumen of the pronephric tubule, quickly accumulated in tubular cells, and was detectably excreted at the cloaca. In contrast, 500-kDa dextran could not be visualized in the tubule at any time point. To check whether alterations in glomerular function can be quantified by our method, we injected morpholino oligonucleotides (MOs) against zebrafish nonmuscle myosin heavy chain IIA (zMyh9) or apolipoprotein L1 (zApol1). While glomerular filtration was reduced in zebrafish nonmuscle myosin heavy chain IIA MO-injected larvae, glomerular barrier function remained intact. In contrast, in zebrafish apolipoprotein L1 MO-injected larvae, glomerular barrier function was compromised as 500-kDa dextran disappeared from the circulation and became visible in tubular cells. In summary, we present a novel method that allows to simultaneously assess glomerular filtration and barrier function in live zebrafish.
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Affiliation(s)
- Ahmed M Kotb
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany; and
| | - Tobias Müller
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany; and
| | - Jing Xie
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio
| | - Bela Anand-Apte
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio
| | - Karlhans Endlich
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany; and
| | - Nicole Endlich
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany; and
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19
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Endlich N, Simon O, Göpferich A, Wegner H, Moeller MJ, Rumpel E, Kotb AM, Endlich K. Two-photon microscopy reveals stationary podocytes in living zebrafish larvae. J Am Soc Nephrol 2013; 25:681-6. [PMID: 24309184 DOI: 10.1681/asn.2013020178] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Podocytes are an essential component of the glomerular filtration barrier and cover the outer aspect of glomerular capillaries. They form a complex actin-based cytoskeleton in vivo and show prominent motility in vitro, but whether podocytes are stationary or mobile in vivo is debated. To address this question, the pronephros of translucent zebrafish larvae (casper) expressing enhanced green fluorescent protein (eGFP) specifically in podocytes (wt1a:eGFP larvae) was observed by intravital two-photon microscopy over extended periods of time. Podocyte cell bodies and the interdigitating branching pattern of major processes could be resolved with a resolution of approximately 1 µm in the xy-plane. Time-lapse imaging of zebrafish larvae at 5-7 days after fertilization demonstrated that podocytes neither migrated nor changed the branching pattern of their major processes over a time period of up to 23 hours. In summary, we show by extended intravital two-photon microscopy that podocytes are stationary cells in the intact glomerulus of a translucent zebrafish with fluorescently-labeled podocytes.
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Affiliation(s)
- Nicole Endlich
- Department of Anatomy and Cell Biology, Universitätsmedizin Greifswald, Greifswald, Germany
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20
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Kotb AM, Hierholzer A, Kemler R. Replacement of E-cadherin by N-cadherin in the mammary gland leads to fibrocystic changes and tumor formation. Breast Cancer Res 2011; 13:R104. [PMID: 22030022 PMCID: PMC3262217 DOI: 10.1186/bcr3046] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 09/21/2011] [Accepted: 10/26/2011] [Indexed: 12/15/2022] Open
Abstract
Introduction E-cadherin (E-cad; cadherin 1) and N-cadherin (N-cad; cadherin 2) are the most prominent members of the cadherin family of cell adhesion molecules. Although they share many structural and functional features, they are expressed in an almost mutually exclusive manner in vivo. Methods To explore functional differences between the two cadherins in vivo, we recently generated a knock-in line in which N-cad is expressed from the E-cad locus. In combination with a conditional gene inactivation approach, we expressed N-cad in the absence of E-cad (referred to as Ncadk.i.) in alveolar epithelial cells of the mammary gland starting in late pregnancy. Results We found that the sole presence of N-cad induces constitutively active fibroblast growth factor (Fgf) signaling and a precocious involution resulting in massive apoptosis of alveolar cells. To block apoptosis, we conditionally deleted one allele of p53 in Ncadk.i. mice and observed a temporal rescue of alveolar morphology and function. However, an accumulation of fibrotic tissue and cysts with increasing age and lactation cycles was observed. This phenotype closely resembled fibrocystic mastopathy (FM), a common disorder in humans, which is thought to precede breast cancer. Concordantly, 55% of Ncadk.i. mice harboring a heterozygous p53 deletion developed malignant and invasive tumors. Conclusions Our results demonstrate a possible role for N-cad in the formation of fibrosis and cysts in the mammary gland. Moreover, we show that these lesions precede the development of malignant tumors. Thus, we provide a new mouse model to investigate the molecular mechanisms of fibrocystic mastopathy and the transition from benign to malignant tumors.
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Affiliation(s)
- Ahmed M Kotb
- Department of Molecular Embryology, Max Planck Institute of Immunobiology and Epigenetics, Stuebeweg 51, D-79108 Freiburg, Germany
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