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Stüben BO, Ahmadi S, Saner FH, Li J, Neuhaus JP, Treckmann JW, Hoyer DP. The significance of resection margins on R0 results in intrahepatic cholangiocarcinoma. Surg Oncol 2024; 53:102058. [PMID: 38431994 DOI: 10.1016/j.suronc.2024.102058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 02/01/2024] [Accepted: 02/28/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND Intrahepatic cholangiocarcinoma is the second most common primary liver cancer after hepatocellular carcinoma with an increasing incidence worldwide. Surgical resection is still the only potential cure, and survival rates are dismal due to disease relapse after resection and/or metastatic disease. Positive resection margins are associated with recurrence, with conflicting studies regarding the benefits of wide resection margins to reduce recurrence rates. METHODS 126 patients with an R0 resection treated with hepatic surgery for intrahepatic cholangiocarcinoma at the Surgical Department at the Medical University Centre Essen, Germany were identified in a database and retrospectively analysed. Patients were grouped into three groups according to margin width, <1 mm (very narrow margin width) 1-5 mm (narrow margin width) and >5 mm (wide margin width). Epidemiological as well as perioperative data was analysed, and a univariate analysis as well as Kaplan-Meier plots carried out to investigate recurrence-free and overall survival. RESULTS Wider resection margins did not lead to better recurrence-free survival. A wider resection margin >5 mm was not significantly associated with improved overall survival. Positive lymph nodes (HR 2.50, 95% CI 1.11-5.61, p=0.027) and non-anatomic resections (HR 2.06, 95% CI 1.13-3.75, p=0.019) are significantly associated with poorer overall survival. Regarding recurrence-free survival, V2 vascular invasion was the only risk factor statistically significantly associated with poorer recurrence-free survival (HR 8.83, 95% CI 0.85-2.83, p=0.005). CONCLUSION Resection margins did not have a significant impact on disease free survival or overall survival following hepatic resection for intrahepatic cholangiocarcinoma. Non-anatomical resections, lymph node and vascular invasion all significantly impacted oncological outcomes.
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Affiliation(s)
- B O Stüben
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany.
| | - S Ahmadi
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany
| | - F H Saner
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany; Organ Transplant Center of Excellence, King Faisal Specialist Hospital & Research Center, Riyadh, Kingdom of Saudi Arabia
| | - J Li
- Department of Surgery, Jiahui International Hospital, Shanghai, China
| | - J P Neuhaus
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany
| | - J W Treckmann
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany
| | - D P Hoyer
- Department of General-, Visceral- and Transplant Surgery, Medical Centre University Duisburg-Essen, 45147, Essen, Germany
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Tulika T, Pedersen RW, Rimbault C, Ahmadi S, Rivera‐de‐Torre E, Fernández‐Quintero ML, Loeffler JR, Bohn M, Ljungars A, Ledsgaard L, Voldborg BG, Ruso‐Julve F, Andersen JT, Laustsen AH. Phage display assisted discovery of a pH-dependent anti-α-cobratoxin antibody from a natural variable domain library. Protein Sci 2023; 32:e4821. [PMID: 37897425 PMCID: PMC10659949 DOI: 10.1002/pro.4821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/28/2023] [Accepted: 10/24/2023] [Indexed: 10/30/2023]
Abstract
Recycling IgG antibodies bind to their target antigen at physiological pH in the blood stream and release them upon endocytosis when pH levels drop, allowing the IgG antibodies to be recycled into circulation via FcRn-mediated cellular pathways, while the antigens undergo lysosomal degradation. This enables recycling antibodies to achieve comparable therapeutic effect at lower doses than their non-recycling counterparts. The development of such antibodies is typically achieved by histidine doping of their variable regions or by performing in vitro antibody selection campaigns utilizing histidine doped libraries. Both are strategies that may introduce sequence liabilities. Here, we present a methodology that employs a naïve antibody phage display library, consisting of natural variable domains, to discover antibodies that bind α-cobratoxin from the venom of Naja kaouthia in a pH-dependent manner. As a result, an antibody was discovered that exhibits a 7-fold higher off-rate at pH 5.5 than pH 7.4 in bio-layer interferometry experiments. Interestingly, no histidine residues were found in its variable domains, and in addition, the antibody showed pH-dependent binding to a histidine-devoid antigen mutant. As such, the results demonstrate that pH-dependent antigen-antibody binding may not always be driven by histidine residues. By employing molecular dynamics simulations, different protonation states of titratable residues were found, which potentially could be responsible for the observed pH-dependent antigen binding properties of the antibody. Finally, given the typically high diversity of naïve antibody libraries, the methodology presented here can likely be applied to discover recycling antibodies against different targets ab initio without the need for histidine doping.
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Affiliation(s)
- Tulika Tulika
- Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
| | - Rasmus W. Pedersen
- Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
| | - Charlotte Rimbault
- Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
| | - Shirin Ahmadi
- Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
| | | | - Monica L. Fernández‐Quintero
- Center for Molecular Biosciences Innsbruck, Department of GeneralInorganic and Theoretical Chemistry, University of InnsbruckInnsbruckAustria
| | - Johannes R. Loeffler
- Center for Molecular Biosciences Innsbruck, Department of GeneralInorganic and Theoretical Chemistry, University of InnsbruckInnsbruckAustria
| | - Markus‐Frederik Bohn
- Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
| | - Anne Ljungars
- Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
| | - Line Ledsgaard
- Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
| | - Bjørn G. Voldborg
- Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
| | - Fulgencio Ruso‐Julve
- Department of PharmacologyUniversity of OsloOsloNorway
- Department of ImmunologyOslo University Hospital RikshospitaletOsloNorway
- Precision Immunotherapy AllianceUniversity of OsloOsloNorway
| | - Jan Terje Andersen
- Department of PharmacologyUniversity of OsloOsloNorway
- Department of ImmunologyOslo University Hospital RikshospitaletOsloNorway
- Precision Immunotherapy AllianceUniversity of OsloOsloNorway
| | - Andreas H. Laustsen
- Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
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Fattahi M, Shahrabi S, Saadatpour F, Rezaee D, Beyglu Z, Delavari S, Amrolahi A, Ahmadi S, Bagheri-Mohammadi S, Noori E, Majidpoor J, Nouri S, Aghaei-Zarch SM, Falahi S, Najafi S, Le BN. microRNA-382 as a tumor suppressor? Roles in tumorigenesis and clinical significance. Int J Biol Macromol 2023; 250:125863. [PMID: 37467828 DOI: 10.1016/j.ijbiomac.2023.125863] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [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: 02/22/2023] [Revised: 06/30/2023] [Accepted: 07/15/2023] [Indexed: 07/21/2023]
Abstract
MicroRNAs (miRNAs) are small single-stranded RNAs belonging to a class of non-coding RNAs with an average length of 18-22 nucleotides. Although not able to encode any protein, miRNAs are vastly studied and found to play role in various human physiologic as well as pathological conditions. A huge number of miRNAs have been identified in human cells whose expression is straightly regulated with crucial biological functions, while this number is constantly increasing. miRNAs are particularly studied in cancers, where they either can act with oncogenic function (oncomiRs) or tumor-suppressors role (referred as tumor-suppressor/oncorepressor miRNAs). miR-382 is a well-studied miRNA, which is revealed to play regulatory roles in physiological processes like osteogenic differentiation, hematopoietic stem cell differentiation and normal hematopoiesis, and liver progenitor cell differentiation. Notably, miR-382 deregulation is reported in pathologic conditions, such as renal fibrosis, muscular dystrophies, Rett syndrome, epidural fibrosis, atrial fibrillation, amelogenesis imperfecta, oxidative stress, human immunodeficiency virus (HIV) replication, and various types of cancers. The majority of oncogenesis studies have claimed miR-382 downregulation in cancers and suppressor impact on malignant phenotype of cancer cells in vitro and in vivo, while a few studies suggest opposite findings. Given the putative role of this miRNA in regulation of oncogenesis, assessment of miR-382 expression is suggested in a several clinical investigations as a prognostic/diagnostic biomarker for cancer patients. In this review, we have an overview to recent studies evaluated the role of miR-382 in oncogenesis as well as its clinical potential.
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Affiliation(s)
- Mehdi Fattahi
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam; School of Engineering & Technology, Duy Tan University, Da Nang, Vietnam
| | - Saeid Shahrabi
- Department of Biochemistry and Hematology, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Fatemeh Saadatpour
- Pharmaceutical Biotechnology Lab, Department of Microbiology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran
| | - Delsuz Rezaee
- School of Allied Medical Sciences, Ilam University of Medical Sciences, Ilam, Iran
| | - Zahra Beyglu
- Department of Genetics, Qom Branch, Islamic Azad University, Qom, Iran
| | - Sana Delavari
- Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Anita Amrolahi
- Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Shirin Ahmadi
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeid Bagheri-Mohammadi
- Department of Physiology and Neurophysiology Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Effat Noori
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Jamal Majidpoor
- Department of Anatomy, Faculty of Medicine, Infectious Disease Research Center, Gonabad University of Medical Sciences, Gonabad, Iran
| | - Shadi Nouri
- Department of Radiology, School of Medicine, Arak University of Medical Sciences, Arak, Iran.
| | - Seyed Mohsen Aghaei-Zarch
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Shahab Falahi
- Zoonotic Diseases Research Center, Ilam University of Medical Sciences, Ilam, Iran.
| | - Sajad Najafi
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Binh Nguyen Le
- Institute of Research and Development, Duy Tan University, Da Nang, Vietnam; School of Engineering & Technology, Duy Tan University, Da Nang, Vietnam
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4
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Ahmadi S, Benard-Valle M, Boddum K, Cardoso FC, King GF, Laustsen AH, Ljungars A. From squid giant axon to automated patch-clamp: electrophysiology in venom and antivenom research. Front Pharmacol 2023; 14:1249336. [PMID: 37693897 PMCID: PMC10484000 DOI: 10.3389/fphar.2023.1249336] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 06/28/2023] [Accepted: 08/11/2023] [Indexed: 09/12/2023] Open
Abstract
Ion channels play a crucial role in diverse physiological processes, including neurotransmission and muscle contraction. Venomous creatures exploit the vital function of ion channels by producing toxins in their venoms that specifically target these ion channels to facilitate prey capture upon a bite or a sting. Envenoming can therefore lead to ion channel dysregulation, which for humans can result in severe medical complications that often necessitate interventions such as antivenom administration. Conversely, the discovery of highly potent and selective venom toxins with the capability of distinguishing between different isoforms and subtypes of ion channels has led to the development of beneficial therapeutics that are now in the clinic. This review encompasses the historical evolution of electrophysiology methodologies, highlighting their contributions to venom and antivenom research, including venom-based drug discovery and evaluation of antivenom efficacy. By discussing the applications and advancements in patch-clamp techniques, this review underscores the profound impact of electrophysiology in unravelling the intricate interplay between ion channels and venom toxins, ultimately leading to the development of drugs for envenoming and ion channel-related pathologies.
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Affiliation(s)
- Shirin Ahmadi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Melisa Benard-Valle
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | | | - Fernanda C. Cardoso
- Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia
- Australian Research Council Centre of Excellence for Innovations in Protein and Peptide Science, University of Queensland, St Lucia, QLD, Australia
| | - Glenn F. King
- Institute for Molecular Bioscience, University of Queensland, St Lucia, QLD, Australia
- Australian Research Council Centre of Excellence for Innovations in Protein and Peptide Science, University of Queensland, St Lucia, QLD, Australia
| | - Andreas Hougaard Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Anne Ljungars
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
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5
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Moore CM, Ljungars A, Paul MJ, Dahl CH, Ahmadi S, Adams AC, Grav LM, Schoffelen S, Voldborg BG, Laustsen AH, Ma JKC. Characterisation of two snake toxin-targeting human monoclonal immunoglobulin G antibodies expressed in tobacco plants. Toxicon 2023:107225. [PMID: 37442299 DOI: 10.1016/j.toxicon.2023.107225] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 05/04/2023] [Revised: 07/06/2023] [Accepted: 07/10/2023] [Indexed: 07/15/2023]
Abstract
Current snakebite antivenoms are based on polyclonal animal-derived antibodies, which can neutralize snake venom toxins in envenomed victims, but which are also associated with adverse reactions. Therefore, several efforts within antivenom research aim to explore the utility of recombinant monoclonal antibodies, such as human immunoglobulin G (IgG) antibodies, which are routinely used in the clinic for other indications. In this study, the feasibility of using tobacco plants as bioreactors for expressing full-length human monoclonal IgG antibodies against snake toxins was investigated. We show that the plant-produced antibodies perform similarly to their mammalian cell-expressed equivalents in terms of in vitro binding. Complete neutralization was achieved by both the plant and mammalian cell-produced anti-α-cobratoxin antibody. The feasibility of using plant-based expression systems may potentially make it easier for laboratories in resource-poor settings to work with human monoclonal IgG antibodies.
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Affiliation(s)
- Catherine M Moore
- School of Life Sciences, College of Liberal Arts and Sciences, University of Westminster, London, W1W 6UW, United Kingdom.
| | - Anne Ljungars
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Matthew J Paul
- Hotung Molecular Immunology Unit, Institute for Infection & Immunity, St George's University of London, Cranmer Terrace, London, SW17 0RE, United Kingdom
| | - Camilla Holst Dahl
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Shirin Ahmadi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Anna Christina Adams
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Lise Marie Grav
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Sanne Schoffelen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Bjørn Gunnar Voldborg
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Andreas Hougaard Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark.
| | - Julian K-C Ma
- Hotung Molecular Immunology Unit, Institute for Infection & Immunity, St George's University of London, Cranmer Terrace, London, SW17 0RE, United Kingdom
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6
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Ahmadi S, Mosavari N, Tebianian M. Comparative Evaluation of Specific Antibody against Mycobacterium tuberculosis ESAT-6 Recombinant Antigen in Healthy Subject with Positive and Negative Skin Test. Arch Razi Inst 2023; 78:815-821. [PMID: 38028850 PMCID: PMC10657930 DOI: 10.22092/ari.2022.360063.2543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 10/03/2022] [Indexed: 12/01/2023]
Abstract
Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis (M. tuberculosis). The laboratory diagnosis of the disease includes various bacteriologic and immunologic methods. Despite the effectiveness of many of these methods in diagnosing active TB, their high cost and time-consuming nature have led researchers to adopt more accurate and rapid screening methods based on specific antigens for M. tuberculosis. The present study aimed to measure specific antibody serum levels against the early secretory antigenic target 6 kDa (ESAT-6) recombinant protein in healthy people and compare it to TB patients. The target population included 27 TB patients and 87 healthy individuals with no clinical TB symptoms. The healthy population was divided into two groups, including positive purified protein derivative (PPD) and negative PPD (35 and 52 people, respectively), using the Tuberculin skin test. The specific antibody level against the ESAT-6 recombinant antigen and the PPD protein was measured using an indirect Enzyme-Linked Immunosorbent Assay (ELISA) test. The results of the study showed that the majority of the healthy population with no symptoms of clinical TB and having negative skin test results did not have antibodies against the recombinant ESAT-6 (98%) and PPD (96%) antigens. On the other hand, there was a high level of the specific antibody of the ESAT-6 recombinant and PPD antigens in TB patients (77%). It is notable that in people with positive skin test results, the level of the antibody against the ESAT-6 recombinant antigen and PPD antigen was 94%. The results demonstrated that the ELISA method based on the measurement of antibodies against the ESAT-6 recombinant antigen can be a proper diagnostic method for rapid and accurate screening of healthy from infected people.
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Affiliation(s)
- S Ahmadi
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - N Mosavari
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - M Tebianian
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
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7
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Nguyen GTT, O'Brien C, Wouters Y, Seneci L, Gallissà-Calzado A, Campos-Pinto I, Ahmadi S, Laustsen AH, Ljungars A. High-throughput proteomics and in vitro functional characterization of the 26 medically most important elapids and vipers from sub-Saharan Africa. Gigascience 2022; 11:6862934. [PMID: 36509548 PMCID: PMC9744630 DOI: 10.1093/gigascience/giac121] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/06/2022] [Accepted: 11/14/2022] [Indexed: 12/15/2022] Open
Abstract
Venomous snakes are important parts of the ecosystem, and their behavior and evolution have been shaped by their surrounding environments over the eons. This is reflected in their venoms, which are typically highly adapted for their biological niche, including their diet and defense mechanisms for deterring predators. Sub-Saharan Africa is rich in venomous snake species, of which many are dangerous to humans due to the high toxicity of their venoms and their ability to effectively deliver large amounts of venom into their victims via their bite. In this study, the venoms of 26 of sub-Saharan Africa's medically most relevant elapid and viper species were subjected to parallelized toxicovenomics analysis. The analysis included venom proteomics and in vitro functional characterization of whole venom toxicities, enabling a robust comparison of venom profiles between species. The data presented here corroborate previous studies and provide biochemical details for the clinical manifestations observed in envenomings by the 26 snake species. Moreover, two new venom proteomes (Naja anchietae and Echis leucogaster) are presented here for the first time. Combined, the presented data can help shine light on snake venom evolutionary trends and possibly be used to further improve or develop novel antivenoms.
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Affiliation(s)
| | | | - Yessica Wouters
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Lorenzo Seneci
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Alex Gallissà-Calzado
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Isabel Campos-Pinto
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Shirin Ahmadi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Andreas H Laustsen
- Correspondence address. Andreas H. Laustsen, Technical University of Denmark, Department of Biotechnology and Biomedicine, Søltofts Plads 239, 2800 Kgs. Lyngby. E-mail:
| | - Anne Ljungars
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
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8
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Ahmadi S, Pachis ST, Kalogeropoulos K, McGeoghan F, Canbay V, Hall SR, Crittenden EP, Dawson CA, Bartlett KE, Gutiérrez JM, Casewell NR, Keller UAD, Laustsen AH. Proteomics and histological assessment of an organotypic model of human skin following exposure to Naja nigricollis venom. Toxicon 2022; 220:106955. [DOI: 10.1016/j.toxicon.2022.106955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 10/03/2022] [Accepted: 10/16/2022] [Indexed: 11/06/2022]
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9
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Ahmadi S, Dayyani M, Etemadrezaie H, Bateni F, Mohabbati H, Pooyan A, Zabihyan S. Diaphragma sellae orifice ratio, is it an applicable anatomical index to determine the direction of the growth of pituitary macroadenomas? Interdisciplinary Neurosurgery 2022. [DOI: 10.1016/j.inat.2022.101547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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10
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Fiil BK, Thrane SW, Pichler M, Kittilä T, Ledsgaard L, Ahmadi S, Maigaard Hermansen GM, Jelsbak L, Lauridsen C, Brix S, Laustsen AH. Orally-active bivalent VHH construct prevents proliferation of F4+ enterotoxigenic Escherichia coli in weaned piglets. iScience 2022; 25:104003. [PMID: 35310945 PMCID: PMC8931358 DOI: 10.1016/j.isci.2022.104003] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/21/2021] [Accepted: 02/25/2022] [Indexed: 11/25/2022] Open
Abstract
A major challenge in industrial pig production is the prevalence of post-weaning diarrhea (PWD) in piglets, often caused by enterotoxigenic Escherichia coli (ETEC). The increased use of antibiotics and zinc oxide to treat PWD has raised global concerns regarding antimicrobial resistance development and environmental pollution. Still, alternative treatments targeting ETEC and counteracting PWD are largely lacking. Here, we report the design of a pH, temperature, and protease-stable bivalent VHH-based protein BL1.2 that cross-links a F4+ ETEC model strain by selectively binding to its fimbriae. This protein inhibits F4+ ETEC adhesion to porcine epithelial cells ex vivo and decreases F4+ ETEC proliferation when administrated as a feed additive to weaned F4+ ETEC challenged piglets. These findings highlight the potential of a highly specific bivalent VHH-based feed additive in effectively delimiting pathogenic F4+ ETEC bacteria proliferation in piglets and may represent a sustainable solution for managing PWD while circumventing antimicrobial resistance development. A binding protein was designed as a bivalent VHH construct with a (GGGGS)3 linker The protein can cross-link F4+ enterotoxigenic Escherichia coli (ETEC) in vitro The protein can prevent adhesion of F4+ ETEC to porcine epithelial cells ex vivo The protein can prevent proliferation of F4+ ETEC in piglets
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11
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Jenkins TP, Ahmadi S, Bittenbinder MA, Stewart TK, Akgun DE, Hale M, Nasrabadi NN, Wolff DS, Vonk FJ, Kool J, Laustsen AH. Terrestrial venomous animals, the envenomings they cause, and treatment perspectives in the Middle East and North Africa. PLoS Negl Trop Dis 2021; 15:e0009880. [PMID: 34855751 PMCID: PMC8638997 DOI: 10.1371/journal.pntd.0009880] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The Middle East and Northern Africa, collectively known as the MENA region, are inhabited by a plethora of venomous animals that cause up to 420,000 bites and stings each year. To understand the resultant health burden and the key variables affecting it, this review describes the epidemiology of snake, scorpion, and spider envenomings primarily based on heterogenous hospital data in the MENA region and the pathologies associated with their venoms. In addition, we discuss the venom composition and the key medically relevant toxins of these venomous animals, and, finally, the antivenoms that are currently in use to counteract them. Unlike Asia and sub-Saharan Africa, scorpion stings are significantly more common (approximately 350,000 cases/year) than snakebites (approximately 70,000 cases/year) and present the most significant contributor to the overall health burden of envenomings, with spider bites being negligible. However, this review also indicates that there is a substantial lack of high-quality envenoming data available for the MENA region, rendering many of these estimates speculative. Our understanding of the venoms and the toxins they contain is also incomplete, but already presents clear trends. For instance, the majority of snake venoms contain snake venom metalloproteinases, while sodium channel-binding toxins and potassium channel-binding toxins are the scorpion toxins that cause most health-related challenges. There also currently exist a plethora of antivenoms, yet only few are clinically validated, and their high cost and limited availability present a substantial health challenge. Yet, some of the insights presented in this review might help direct future research and policy efforts toward the appropriate prioritization of efforts and aid the development of future therapeutic solutions, such as next-generation antivenoms.
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Affiliation(s)
- Timothy P Jenkins
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Shirin Ahmadi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Matyas A Bittenbinder
- Naturalis Biodiversity Center, Leiden, the Netherlands
- Amsterdam Institute for Molecular and Life Sciences, Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Faculty of Sciences, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
- Centre for Analytical Sciences Amsterdam (CASA), Amsterdam, the Netherlands
| | - Trenton K Stewart
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Dilber E Akgun
- Department of Biomedical Engineering, Faculty of Engineering and Architecture, Eskişehir Osmangazi University, Eskişehir, Turkey
| | - Melissa Hale
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Nafiseh N Nasrabadi
- Pharmaceutical Sciences Research Centre, Student Research Commitee, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Department of Venomous Animals and Antivenom Production, Razi Vaccine, and Serum Research Institute, Karaj, Iran
| | - Darian S Wolff
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Freek J Vonk
- Naturalis Biodiversity Center, Leiden, the Netherlands
- Amsterdam Institute for Molecular and Life Sciences, Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Faculty of Sciences, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Jeroen Kool
- Amsterdam Institute for Molecular and Life Sciences, Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Faculty of Sciences, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
- Centre for Analytical Sciences Amsterdam (CASA), Amsterdam, the Netherlands
| | - Andreas H Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
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12
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Ahmadi S, Lotfi S, Afshari S, Kumar P, Ghasemi E. CORAL: Monte Carlo based global QSAR modelling of Bruton tyrosine kinase inhibitors using hybrid descriptors. SAR QSAR Environ Res 2021; 32:1013-1031. [PMID: 34875951 DOI: 10.1080/1062936x.2021.2003429] [Citation(s) in RCA: 7] [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: 09/03/2021] [Accepted: 11/03/2021] [Indexed: 06/13/2023]
Abstract
Global QSAR modelling was performed to predict the pIC50 values of 233 diverse heterocyclic compounds as BTK inhibitors with the Monte Carlo algorithm of CORAL software using the DCW hybrid descriptors extracted from SMILES notations of molecules. The dataset of 233 BTK inhibitors was randomly split into training, invisible training, calibration and validation sets. The index of ideality of correlation was also applied to build and judge the predictability of the QSAR models. Eight global QSAR models based on the hybrid optimal descriptor using two target functions, i.e. TF1 (WIIC = 0) and TF2 (WIIC = 0.2) have been constructed. The statistical parameters of QSAR models computed by TF2 are more reliable and robust and were used to predict the pIC50 values. The model constructed for split 4 via TF2 is regarded as the best model and the numerical values of r2Train, r2Valid, Q2Train and Q2Valid are equal to 0.7981, 0.7429, 0.7898 and 0.6784, respectively. By internal and external validation techniques, the predictability and reliability of the designed models have been assessed. The structural attributes responsible for the increase and decrease of pIC50 of BTK inhibitors were also identified.
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Affiliation(s)
- S Ahmadi
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - S Lotfi
- Department of Chemistry, Payame Noor University (PNU), Tehran, Iran
| | - S Afshari
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - P Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana, India
| | - E Ghasemi
- Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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13
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Alizadehgoradel J, Imani S, Nejati V, Vanderhasselt MA, Molaei B, Salehinejad MA, Ahmadi S, Taherifard M. Improved Executive Functions and Reduced Craving in Youths with Methamphetamine Addiction: Evidence from Combined Transcranial Direct Current Stimulation with Mindfulness Treatment. Clin Psychopharmacol Neurosci 2021; 19:653-668. [PMID: 34690120 PMCID: PMC8553531 DOI: 10.9758/cpn.2021.19.4.653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 10/26/2020] [Accepted: 11/01/2020] [Indexed: 11/18/2022]
Abstract
Objective Transcranial direct current stimulation (tDCS) and mindfulness practices have been proposed as a potential approach to improve executive functions (EFs) and reduce craving in persons with substance use disorders. Based on the neural mechanisms of action of each of these interventions, the combination of both non-pharmacological interventions might have additive effects. In the current study, the effects of tDCS combined with mindfulness-based substance abuse treatment (MBSAT) to improve EFs and reduce craving were investigated in early abstinent methamphetamine abuse. Methods Eighty (youths aged between 18 and 21) early-abstinent methamphetamine users were randomly assigned to the research groups (tDCS group [n = 20], mindfulness group [n = 20], combined mindfulness-tDCS group [n = 20], and sham group [n = 20]). Active tDCS (1.5 mA,20 min, 12 sessions) or sham tDCS was appliedover the left dorsolateral prefrontal cortex and the MBSAT protocol was used over twelve 50-min sessions. Results Both in the post-test phase (immediately after the intervention) and follow-up phase (one month after the intervention), performance in most EFs tasks significantly improved in the combination group which received real tDCS + MBSAT, as compared to baseline values and sham stimulation group. Similarly, a significant reduction in craving was observed after intervention inall treatment groups, but not the sham stimulation group. Interestingly, the increase in EFs and the reduction in craving post versus pre tDCS + MBSAT intervention were correlated. Conclusion Findings from the current study provide initial support for the clinical effectiveness of combination tDCS + MBSAT, possibly influencing cognitive/affective processes.
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Affiliation(s)
- Jaber Alizadehgoradel
- Department of Clinical and Health Psychology, Shahid Beheshti University, Tehran, Iran
| | - Saeed Imani
- Department of Clinical and Health Psychology & Counseling Group, Shahid Beheshti University, Tehran, Iran
| | - Vahid Nejati
- Department of Clinical and Health Psychology, Faculty of Education & Psychology, Shahid Beheshti University, Tehran, Iran
| | - Marie-Anne Vanderhasselt
- Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium.,Department of Head and Skin, Psychiatry and Medical Psychology, Ghent University Hospital, Ghent, Belgium
| | - Behnam Molaei
- Department of Psychiatry, Faculty of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Mohammad Ali Salehinejad
- Department of Psychology and Neurosciences, Leibniz Research Centre for Working Environment and Human Factors, Dortmund, Germany.,Ruhr-University Bochum, International Graduate School of Neuroscience, Bochum, Germany
| | - Shirin Ahmadi
- Department of Psychology, Mohaghegh-Ardabili University, Ardabil, Iran
| | - Mina Taherifard
- Department of Psychology, Mohaghegh-Ardabili University, Ardabil, Iran
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14
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Ahmad S, Hossain MN, Ahmadi S, Kerman K, Kraatz HB. Electrochemical distinction of neuronal and neuroblastoma cells via the phosphorylation of the cellular extracellular membrane. Anal Biochem 2021; 645:114434. [PMID: 34785194 DOI: 10.1016/j.ab.2021.114434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/10/2021] [Accepted: 10/21/2021] [Indexed: 11/20/2022]
Abstract
In this contribution we establish a proof of concept method for monitoring, quantifying and differentiating the extracellular phosphorylation of Human SHSY5Y undifferentiated neuronal cells and neuroblastoma cells by three prominent ectokinases PKA, PKC and Src. Herein it is demonstrated that a combination of different experimental techniques, including fluroesence microscopy, quartz crystal microscopy (QCM) and electrochemistry, can be used to detect extracellular phosphorylation levels of neuronal and neuroblastoma cells. Phosphorylation profiles of the three ectokinases, PKA, PKC and Src, were investigated using fluorescence microscopy and the number of phosphorylation sites per kinase was estimated using QCM. Finally, the phosphorylation of the extracellular membrane was determined using electrochemistry. Our results clearly demonstrate that the extracellular phosphorylation of neuronal cells differs significantly in terms of its phosphorylation profile from diseased neuroblastoma cells and the strength of surface electrochemical techniques in the differentiation process. We reveal that using electrochemistry, the percent compositions of neuronal and neuroblastoma cells can also be identified.
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Affiliation(s)
- S Ahmad
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - M N Hossain
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - S Ahmadi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - K Kerman
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - H-B Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada.
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15
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Ahmadi S, Ashrafi S, Yazdansetad F, Roshanshah N, Tarim UA, Gurler O. A computational modelling of low-energy gamma ray detection efficiency of a cylindrical NaI(Tl) detector. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Ghiasi T, Ahmadi S, Ahmadi E, Talei Bavil Olyai MR, Khodadadi Z. The index of ideality of correlation: QSAR studies of hepatitis C virus NS3/4A protease inhibitors using SMILES descriptors. SAR QSAR Environ Res 2021; 32:495-520. [PMID: 34074200 DOI: 10.1080/1062936x.2021.1925344] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 04/07/2021] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
Robust and reliable QSAR models were developed to predict half-maximal inhibitory concentration (IC50) values of hepatitis C virus NS3/4A protease inhibitors from the Monte Carlo technique. 524 HCV NS3/4A protease inhibitors were extracted from the scientific literature to create a reasonably large set. The models were developed using CORAL software by using two target functions namely target function 1 (TF1) without applying the index of ideality of correlation (IIC) and target function 2 (TF2) that uses IIC. The constructed models based on TF2 were statistically more significant and robust than the models based on TF1. The determination coefficients (r2) of training and test sets were 0.86 and 0.88 for the best split based on TF2. The promoters of the increase/decrease of activity were also extracted and interpreted in detail. The model interpretation results explain the role of different structural attributes in predicting the pIC50 values of hepatitis C virus NS3/4A protease inhibitors. Based on the mechanistic model interpretation results, eight new compounds were designed and their pIC50 values were predicted based on the average prediction of ten models.
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Affiliation(s)
- T Ghiasi
- Department of Chemistry, Faculty of Science, Islamic Azad University, South Tehran Branch, Tehran, Iran
| | - S Ahmadi
- Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - E Ahmadi
- Department of Chemistry, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - M R Talei Bavil Olyai
- Department of Chemistry, Faculty of Science, Islamic Azad University, South Tehran Branch, Tehran, Iran
| | - Z Khodadadi
- Department of Chemistry, Faculty of Science, Islamic Azad University, South Tehran Branch, Tehran, Iran
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17
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Oliveira ISD, Pucca MB, Wiezel GA, Cardoso IA, Bordon KDCF, Sartim MA, Kalogeropoulos K, Ahmadi S, Baiwir D, Nonato MC, Sampaio SV, Laustsen AH, Auf dem Keller U, Quinton L, Arantes EC. Unraveling the structure and function of CdcPDE: A novel phosphodiesterase from Crotalus durissus collilineatus snake venom. Int J Biol Macromol 2021; 178:180-192. [PMID: 33636276 DOI: 10.1016/j.ijbiomac.2021.02.120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 02/13/2021] [Accepted: 02/15/2021] [Indexed: 01/20/2023]
Abstract
This study reports the isolation, structural, biochemical, and functional characterization of a novel phosphodiesterase from Crotalus durissus collilineatus venom (CdcPDE). CdcPDE was successfully isolated from whole venom using three chromatographic steps and represented 0.7% of total protein content. CdcPDE was inhibited by EDTA and reducing agents, demonstrating that metal ions and disulfide bonds are necessary for its enzymatic activity. The highest enzymatic activity was observed at pH 8-8.5 and 37 °C. Kinetic parameters indicated a higher affinity for the substrate bis(p-nitrophenyl) phosphate compared to others snake venom PDEs. Its structural characterization was done by the determination of the protein primary sequence by Edman degradation and mass spectrometry, and completed by the building of molecular and docking-based models. Functional in vitro assays showed that CdcPDE is capable of inhibiting platelet aggregation induced by adenosine diphosphate in a dose-dependent manner and demonstrated that CdcPDE is cytotoxic to human keratinocytes. CdcPDE was recognized by the crotalid antivenom produced by the Instituto Butantan. These findings demonstrate that the study of snake venom toxins can reveal new molecules that may be relevant in cases of snakebite envenoming, and that can be used as molecular tools to study pathophysiological processes due to their specific biological activities.
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Affiliation(s)
- Isadora Sousa de Oliveira
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | - Gisele Adriano Wiezel
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Iara Aimê Cardoso
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Karla de Castro Figueiredo Bordon
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Marco Aurélio Sartim
- Institute of Biological Sciences, Federal University of Amazonas, Manaus, AM, Brazil; Department of Teaching and Research, Dr. Heitor Vieira Dourado Tropical Medicine Foundation, Manaus, AM, Brazil
| | | | - Shirin Ahmadi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Dominique Baiwir
- Mass Spectrometry Laboratory, MolSys Research Unit, Department of Chemistry, University of Liège, Liège, Belgium; GIGA Proteomics Facility, University of Liège, Liège, Belgium
| | - Maria Cristina Nonato
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Suely Vilela Sampaio
- Department of Clinical Analysis, Toxicology and Food Science, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Andreas Hougaard Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Ulrich Auf dem Keller
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Loïc Quinton
- Mass Spectrometry Laboratory, MolSys Research Unit, Department of Chemistry, University of Liège, Liège, Belgium
| | - Eliane Candiani Arantes
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
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18
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Ahmadi S, Nabiuni M, Tahmaseb M, Amini E. Enhanced Neural Differentiation of Epidermal Neural Crest Stem Cell by Synergistic Effect of Lithium carbonate and Crocin on BDNF and GDNF Expression as Neurotrophic Factors. Iran J Pharm Res 2021; 20:95-106. [PMID: 34567149 PMCID: PMC8457715 DOI: 10.22037/ijpr.2019.15561.13176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Neurodegenerative diseases are incurable and debilitating conditions that result in progressive degeneration of nerve cells. Due to the complexity of conditions in neurodegenerative diseases, combination therapy, including cell and drug therapy is important as a new therapeutic strategy. Epidermal neural crest stem cells (EPI-NCSCs) are among the best choices in cell therapy for various neurological diseases. In this study, the effect of Lithium carbonate and Crocin, considering their effects on cellular signaling pathways and neuroprotective properties were investigated on the expression of neurotrophic factors BDNF and GDNF in EPI-NCSCs. EPI-NCSCs were isolated from the hair follicle and treated with different concentrations of drugs [Lithium, Crocin, and lithium + Crocin] for 72h. Then, trial concentrations were selected by MTT assay. The cells were treated with selected concentrations (Lithium 1 mM, Crocin 1.5 mM, and for co-treatment Lithium 1 mM and Crocin 1 mM) for 7 days. The Real-Time PCR results indicated an increasing in expression of BDNF and GDNF in treated cells as compared with control (* p < 0.05, ** p < 0.01 and *** p < 0.001). The results in this study confirmed and supported the neuroprotective/neurogenesis effects of Lithium and Crocin. It also showed that the proposed protocol could be used to increase EPI-NCSCs differentiation potential into neural cells in cell therapy and combination therapy of neurodegenerative diseases.
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Affiliation(s)
- Shirin Ahmadi
- Department of Cellular and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.
| | - Mohammad Nabiuni
- Department of Cellular and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.
| | - Mohammad Tahmaseb
- Department of Cellular and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.
| | - Elaheh Amini
- Department of Animal Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.
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19
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Pucca MB, Franco MVS, Medeiros JM, Oliveira IS, Ahmadi S, Cerni FA, Zottich U, Bassoli BK, Monteiro WM, Laustsen AH. Chronic kidney failure following lancehead bite envenoming: a clinical report from the Amazon region. J Venom Anim Toxins Incl Trop Dis 2020; 26:e20200083. [PMID: 33424950 PMCID: PMC7754649 DOI: 10.1590/1678-9199-jvatitd-2020-0083] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background: Snakebite envenoming can be a life-threatening condition, for which emergency
care is essential. The Bothrops (lancehead) genus is
responsible for most snakebite-related deaths and permanent loss of function
in human victims in Latin America. Bothrops spp. venom is a
complex mixture of different proteins that are known to cause local
necrosis, coagulopathy, and acute kidney injury. However, the long-term
effects of these viper envenomings have remained largely understudied. Case presentation: Here, we present a case report of a 46-years old female patient from Las
Claritas, Venezuela, who was envenomed by a snake from the
Bothrops genus. The patient was followed for a 10-year
period, during which she presented oliguric renal failure, culminating in
kidney failure 60 months after the envenoming. Conclusion: In Latin America, especially in Brazil, where there is a high prevalence of
Bothrops envenoming, it may be relevant to establish
long-term outpatient programs. This would reduce late adverse events, such
as chronic kidney disease, and optimize public financial resources by
avoiding hemodialysis and consequently kidney transplantation.
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Affiliation(s)
- Manuela B Pucca
- Medical School, Federal University of Roraima, Boa Vista, RR, Brazil
| | | | | | - Isadora S Oliveira
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Shirin Ahmadi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Felipe A Cerni
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Umberto Zottich
- Medical School, Federal University of Roraima, Boa Vista, RR, Brazil
| | - Bruna K Bassoli
- Medical School, Federal University of Roraima, Boa Vista, RR, Brazil
| | - Wuelton M Monteiro
- School of Health Sciences, Amazonas State University, Manaus, AM, Brazil.,Department of Teaching and Research, Dr. Heitor Vieira Dourado Tropical Medicine Foundation, Manaus, AM, Brazil
| | - Andreas H Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
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20
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Ahmadi S, Lotfi S, Kumar P. A Monte Carlo method based QSPR model for prediction of reaction rate constants of hydrated electrons with organic contaminants. SAR QSAR Environ Res 2020; 31:935-950. [PMID: 33179988 DOI: 10.1080/1062936x.2020.1842495] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 08/24/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
The Monte Carlo algorithm was applied to formulate a robust quantitative structure-property relationship (QSPR) model to compute the reactions rate constants of hydrated electron values for a data set of 309 water contaminants containing 125 aliphatic and 184 phenyl-based chemicals. The QSPR models were computed with the hybrid optimal descriptors which were procured by combining the SMILES and hydrogen-suppressed molecular graph for both classes of compounds. Approximately 75% of the total experimental data set was randomly divided into training and invisible training sets, while approximately 25% was divided into calibration and validation sets. The authenticity and robustness of the developed QSPR models were also judged by the Index of Ideality of Correlation. In QSPR modelling of aliphatic compounds, the numerical values of r T r a i n i n g 2 , r V a l i d a t i o n 2 , Q T r a i n i n g 2 and Q V a l i d a t i o n 2 were in the range of 0.852-0.905, 0.815-0.894, 0.839-0.897 and 0.737-0.867, respectively. Whereas, in the QSPR modelling of phenyl-based compounds, the numerical values of r T r a i n i n g 2 , r V a l i d a t i o n 2 , Q T r a i n i n g 2 and Q V a l i d a t i o n 2 were in the range of 0.867-0.896, 0.852-0.865, 0.816-0.850 and 0.760-0.762, respectively. The structural attributes, which are promoters of l o g K e a q - increase/decrease are also extracted from the SMILES notation for mechanistic interpretation. These QSPR models can also be applied to compute the reaction rate constants of organic contaminants.
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Affiliation(s)
- S Ahmadi
- Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University , Tehran, Iran
| | - S Lotfi
- Department of Chemistry, Payame Noor University (PNU) , Tehran, Iran
| | - P Kumar
- Department of Chemistry, Kurukshetra University , Kurukshetra, Haryana, India
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21
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Javidfar M, Ahmadi S. QSAR modelling of larvicidal phytocompounds against Aedes aegypti using index of ideality of correlation. SAR QSAR Environ Res 2020; 31:717-739. [PMID: 32930630 DOI: 10.1080/1062936x.2020.1806922] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 06/09/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Aedes aegypti is the primary vector of several infectious viruses that cause yellow, dengue, chikungunya, and Zika fevers. Recently, plant-derived products have been tested as safe and eco-friendly larvicides against Ae. aegypti. The present study aimed to improve QSAR models for 62 larvicidal phytocompounds against Ae. aegypti via the Monte Carlo method based on the index of the ideality of correlation (IIC) criterion. The representation of structures was done with SMILES. Three splits were prepared randomly and three QSAR models were constructed using IIC target function. The molecular descriptors were selected from SMILES descriptors and the hydrogen-filled molecular graphs. The predictability of three models was evaluated on the validation sets, the r 2 of which was 0.9770, 0.8660, and 0.8565 for models 1 to 3, respectively. The statistical results of three randomized splits indicated that robust, simple, predictive, and reliable models were obtained for different sets. From the modelling results, important descriptors were identified to enhance and reduce the larvicidal activity of compounds. Based on the identified important descriptors, some new structures of larvicidal compounds were proposed. The larvicidal activity of novel molecules designed further was supported by docking studies. Using the simple QSAR model, one can predict pLC50 of new similarity larvicidal phytocompounds.
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Affiliation(s)
- M Javidfar
- Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University , Tehran, Iran
| | - S Ahmadi
- Department of Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University , Tehran, Iran
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22
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Ahmad S, Hossain MN, Ahmadi S, Kerman K, Kraatz HB. Electrochemical detection of neuronal extracellular phosphorylation by PKA, PKC and Src. Anal Biochem 2020; 608:113892. [PMID: 32810472 DOI: 10.1016/j.ab.2020.113892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/21/2020] [Accepted: 07/24/2020] [Indexed: 11/30/2022]
Abstract
The focus of this work described here is to establish a method for monitoring and quantifying the extracellular phosphorylation of Human SHSY5Y undifferentiated neuronal cells by three ectokinases PKA, PKC and Src; these are kinases that are known to be present in the extracellular matrix. Here is demonstrated that a combination of different experimental techniques, including microscopy and electrochemistry, can be used to detect extracellular phosphorylations. Phosphorylation profiles of the three ectokinases, PKA, PKC and Src, were investigated using fluorescence microscopy and the number of phosphorylation sites per kinase was estimated using QCM. Finally, the phosphorylation of the extracellular membrane was determined using electrochemistry. Our results clearly demonstrate the extracellular phosphorylation of neuronal cells and the strength of surface electrochemical techniques in the investigation of cellular phosphorylation.
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Affiliation(s)
- S Ahmad
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - M N Hossain
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - S Ahmadi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - K Kerman
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - H-B Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada.
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Ashuri T, Armani A, Jalilzadeh Hamidi R, Reasnor T, Ahmadi S, Iqbal K. Biomedical soft robots: current status and perspective. Biomed Eng Lett 2020; 10:369-385. [PMID: 32864173 PMCID: PMC7438463 DOI: 10.1007/s13534-020-00157-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 04/02/2020] [Accepted: 04/18/2020] [Indexed: 12/13/2022] Open
Abstract
This paper reviews the current status of soft robots in biomedical field. Soft robots are made of materials that have comparable modulus of elasticity to that of biological systems. Several advantages of soft robots over rigid robots are safe human interaction, ease of adaptation with wearable electronics and simpler gripping. We review design factors of soft robots including modeling, controls, actuation, fabrication and application, as well as their limitations and future work. For modeling, we survey kinematic, multibody and numerical finite element methods. Finite element methods are better suited for the analysis of soft robots, since they can accurately model nonlinearities in geometry and materials. However, their real-time integration with controls is challenging. We categorize the controls of soft robots as model-based and model-free. Model-free controllers do not rely on an explicit analytical or numerical model of the soft robot to perform actuation. Actuation is the ability to exert a force using actuators such as shape memory alloys, fluid gels, elastomers and piezoelectrics. Nonlinear geometry and materials of soft robots restrict using conventional rigid body controls. The fabrication techniques used for soft robots differ significantly from that of rigid robots. We survey a wide range of techniques used for fabrication of soft robots from simple molding to more advanced additive manufacturing methods such as 3D printing. We discuss the applications and limitations of biomedical soft robots covering aspects such as functionality, ease of use and cost. The paper concludes with the future discoveries in the emerging field of soft robots.
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Affiliation(s)
- T. Ashuri
- Department of Mechanical Engineering, Arkansas Tech University, 1811 N Boulder Ave, Russellville, AR 72801 USA
| | - A. Armani
- Department of Mechanical Engineering, San Jose State University, 1 Washington Square, San Jose, CA 95112 USA
| | - R. Jalilzadeh Hamidi
- Department of Electrical Engineering, Arkansas Tech University, 1811 N Boulder Ave, Russellville, AR 72801 USA
| | - T. Reasnor
- Department of Mechanical Engineering, Arkansas Tech University, 1811 N Boulder Ave, Russellville, AR 72801 USA
| | - S. Ahmadi
- Department of Orthopedic Surgery, University of Arkansas for Medical Sciences, 10815 Colonel Glenn Rd, Little Rock, AR 72204 USA
| | - K. Iqbal
- Department of Systems Engineering, University of Arkansas at Little Rock, 2801 S University Ave, Little Rock, AR 72204 USA
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24
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Moradi M, Karimi I, Ahmadi S, Mohammed LJ. The necessity of antioxidant inclusion in caprine and ovine semen extenders: A systematic review complemented with computational insight. Reprod Domest Anim 2020; 55:1027-1043. [PMID: 32597508 DOI: 10.1111/rda.13754] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 02/19/2020] [Accepted: 06/17/2020] [Indexed: 11/28/2022]
Abstract
The inclusion of antioxidants (AOXs) has been proposed in various protocols to conserve the normal physiology of spermatozoa during (cryo) preservation. The main aim of this review was to understand the necessity of AOXs inclusion in semen extenders of caprine and ovine semen samples and to decipher physico-chemical space of AOXs used in semen extenders till now. A total 27 full-text relevant articles were finally discussed here. This systematic review showed that the inclusion of AOXs may improve the success of semen cryopreservation although at least three studies could not support this finding. AOXs have been not added after assaying total antioxidant capacity of the sample of interest, and this is principal measurement bias of all papers. Furthermore, no rational dose-response curve and precise posology have been considered in comparable studies. Furthermore, new methodologies are requested to detect the oxidative status of semen specimens before AXOs fortification and new methodologies like imaging are also needed to detect various injuries of sperms during semen (cryo)preservation. Defining computational chemical and physical spaces of AOXs which used in semen (cryo)preservation would be an interdisciplinary effort to hasten deciphering epoch-making compounds. In conclusion, more in-depth analytical, toxicological and pharmacological methodologies should be pursued in supplementation or addition of AOXs during caprine and ovine semen (cryo)preservation after determining the oxidative status of semen samples.
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Affiliation(s)
- Mojtaba Moradi
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Razi University, Kermanshah, Iran
| | - Isaac Karimi
- Department of Biology, Faculty of Science, Razi University, Kermanshah, Iran
| | - Shirin Ahmadi
- Department of Biology, Faculty of Science, Razi University, Kermanshah, Iran
| | - Layth J Mohammed
- Department of Biology, Faculty of Science, Razi University, Kermanshah, Iran
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25
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Ahmadi S, Pucca MB, Jürgensen JA, Janke R, Ledsgaard L, Schoof EM, Sørensen CV, Çalışkan F, Laustsen AH. An in vitro methodology for discovering broadly-neutralizing monoclonal antibodies. Sci Rep 2020; 10:10765. [PMID: 32612183 PMCID: PMC7329857 DOI: 10.1038/s41598-020-67654-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/11/2020] [Indexed: 12/27/2022] Open
Abstract
Broadly-neutralizing monoclonal antibodies are of high therapeutic utility against infectious diseases caused by bacteria and viruses, as well as different types of intoxications. Snakebite envenoming is one such debilitating pathology, which is currently treated with polyclonal antibodies derived from immunized animals. For the development of novel envenoming therapies based on monoclonal antibodies with improved therapeutic benefits, new discovery approaches for broadly-neutralizing antibodies are needed. Here, we present a methodology based on phage display technology and a cross-panning strategy that enables the selection of cross-reactive monoclonal antibodies that can broadly neutralize toxins from different snake species. This simple in vitro methodology is immediately useful for the development of broadly-neutralizing (polyvalent) recombinant antivenoms with broad species coverage, but may also find application in the development of broadly-neutralizing antibodies against bacterial, viral, and parasitic agents that are known for evading therapy via resistance mechanisms and antigen variation.
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Affiliation(s)
- Shirin Ahmadi
- Department of Biotechnology and Biosafety, Graduate School of Natural and Applied Sciences, Eskisehir Osmangazi University, Eskisehir, Turkey
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Manuela B Pucca
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
- Medical School, Federal University of Roraima, Boa Vista, Roraima, Brazil
| | - Jonas A Jürgensen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Rahel Janke
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Line Ledsgaard
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Erwin M Schoof
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Christoffer V Sørensen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Figen Çalışkan
- Department of Biotechnology and Biosafety, Graduate School of Natural and Applied Sciences, Eskisehir Osmangazi University, Eskisehir, Turkey
- Department of Biology, Faculty of Science and Letters, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Andreas H Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark.
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26
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Ahmadi S, Knerr JM, Argemi L, Bordon KCF, Pucca MB, Cerni FA, Arantes EC, Çalışkan F, Laustsen AH. Scorpion Venom: Detriments and Benefits. Biomedicines 2020; 8:biomedicines8050118. [PMID: 32408604 PMCID: PMC7277529 DOI: 10.3390/biomedicines8050118] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/01/2020] [Accepted: 05/07/2020] [Indexed: 12/17/2022] Open
Abstract
Scorpion venom may cause severe medical complications and untimely death if injected into the human body. Neurotoxins are the main components of scorpion venom that are known to be responsible for the pathological manifestations of envenoming. Besides neurotoxins, a wide range of other bioactive molecules can be found in scorpion venoms. Advances in separation, characterization, and biotechnological approaches have enabled not only the development of more effective treatments against scorpion envenomings, but have also led to the discovery of several scorpion venom peptides with interesting therapeutic properties. Thus, scorpion venom may not only be a medical threat to human health, but could prove to be a valuable source of bioactive molecules that may serve as leads for the development of new therapies against current and emerging diseases. This review presents both the detrimental and beneficial properties of scorpion venom toxins and discusses the newest advances within the development of novel therapies against scorpion envenoming and the therapeutic perspectives for scorpion toxins in drug discovery.
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Affiliation(s)
- Shirin Ahmadi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (J.M.K.); (L.A.); (M.B.P.); (F.A.C.)
- Department of Biotechnology and Biosafety, Graduate School of Natural and Applied Sciences, Eşkisehir Osmangazi University, TR-26040 Eşkisehir, Turkey;
- Correspondence: (S.A.); (A.H.L.); Tel.: +45-7164-6042 (S.A.); +45-2988-1134 (A.H.L.)
| | - Julius M. Knerr
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (J.M.K.); (L.A.); (M.B.P.); (F.A.C.)
| | - Lídia Argemi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (J.M.K.); (L.A.); (M.B.P.); (F.A.C.)
| | - Karla C. F. Bordon
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto—São Paulo 14040-903, Brazil; (K.C.F.B.); (E.C.A.)
| | - Manuela B. Pucca
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (J.M.K.); (L.A.); (M.B.P.); (F.A.C.)
- Medical School, Federal University of Roraima, Boa Vista, Roraima 69310-000, Brazil
| | - Felipe A. Cerni
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (J.M.K.); (L.A.); (M.B.P.); (F.A.C.)
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto—São Paulo 14040-903, Brazil; (K.C.F.B.); (E.C.A.)
| | - Eliane C. Arantes
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto—São Paulo 14040-903, Brazil; (K.C.F.B.); (E.C.A.)
| | - Figen Çalışkan
- Department of Biotechnology and Biosafety, Graduate School of Natural and Applied Sciences, Eşkisehir Osmangazi University, TR-26040 Eşkisehir, Turkey;
- Department of Biology, Faculty of Science and Letters, Eskisehir Osmangazi University, TR-26040 Eskisehir, Turkey
| | - Andreas H. Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark; (J.M.K.); (L.A.); (M.B.P.); (F.A.C.)
- Correspondence: (S.A.); (A.H.L.); Tel.: +45-7164-6042 (S.A.); +45-2988-1134 (A.H.L.)
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27
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Pucca MB, Ahmadi S, Cerni FA, Ledsgaard L, Sørensen CV, McGeoghan FTS, Stewart T, Schoof E, Lomonte B, Auf dem Keller U, Arantes EC, Çalışkan F, Laustsen AH. Unity Makes Strength: Exploring Intraspecies and Interspecies Toxin Synergism between Phospholipases A 2 and Cytotoxins. Front Pharmacol 2020; 11:611. [PMID: 32457615 PMCID: PMC7221120 DOI: 10.3389/fphar.2020.00611] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 04/20/2020] [Indexed: 12/26/2022] Open
Abstract
Toxin synergism is a complex biochemical phenomenon, where different animal venom proteins interact either directly or indirectly to potentiate toxicity to a level that is above the sum of the toxicities of the individual toxins. This provides the animals possessing venoms with synergistically enhanced toxicity with a metabolic advantage, since less venom is needed to inflict potent toxic effects in prey and predators. Among the toxins that are known for interacting synergistically are cytotoxins from snake venoms, phospholipases A2 from snake and bee venoms, and melittin from bee venom. These toxins may derive a synergistically enhanced toxicity via formation of toxin complexes by hetero-oligomerization. Using a human keratinocyte assay mimicking human epidermis in vitro, we demonstrate and quantify the level of synergistically enhanced toxicity for 12 cytotoxin/melittin-PLA2 combinations using toxins from elapids, vipers, and bees. Moreover, by utilizing an interaction-based assay and by including a wealth of information obtained via a thorough literature review, we speculate and propose a mechanistic model for how toxin synergism in relation to cytotoxicity may be mediated by cytotoxin/melittin and PLA2 complex formation.
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Affiliation(s)
- Manuela B Pucca
- Medical School, Federal University of Roraima, Boa Vista, Brazil.,Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Shirin Ahmadi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark.,Department of Biotechnology and Biosafety, Graduate School of Natural and Applied Sciences, Eskişehir Osmangazi University, Eskişehir, Turkey
| | - Felipe A Cerni
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark.,Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Line Ledsgaard
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Christoffer V Sørensen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Farrell T S McGeoghan
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Trenton Stewart
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark.,Department of Biology, Lund University, Lund, Sweden
| | - Erwin Schoof
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Bruno Lomonte
- Facultad de Microbiología, Instituto Clodomiro Picado, Universidad de Costa Rica, San José, Costa Rica
| | - Ulrich Auf dem Keller
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Eliane C Arantes
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Figen Çalışkan
- Department of Biotechnology and Biosafety, Graduate School of Natural and Applied Sciences, Eskişehir Osmangazi University, Eskişehir, Turkey.,Department of Biology, Faculty of Science and Art, Eskişehir Osmangazi University, Eskişehir, Turkey
| | - Andreas H Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
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28
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Ledsgaard L, Ahmadi S, Pucca MB, Cerni FA, Jürgensen JA, Knudsen C, Pus U, Sørensen CV, Føns S, Janke R, Knerr J, Bertelsen A, Dehli RI, Esteban AM, Karatt-Vellatt A, McCafferty J, Lomonte B, Arantes EC, Laustsen AH. Discovery of cross-reactive and recyclable human monoclonal antibodies for new recombinant antivenoms. Toxicon 2020. [DOI: 10.1016/j.toxicon.2019.12.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Bafkary R, Ahmadi S, Fayazi F, Karimi M, Fatahi Y, Ebrahimi SM, Atyabi F, Dinarvand R. Amphiphilic hyperbranched polyester coated rod mesoporous silica nanoparticles for pH-responsive doxorubicin delivery. ACTA ACUST UNITED AC 2020; 28:171-180. [PMID: 32006342 DOI: 10.1007/s40199-020-00328-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 05/01/2019] [Accepted: 01/16/2020] [Indexed: 11/25/2022]
Abstract
Rod-like mesoporous silica nanoparticles with pH-responsive amphiphilic hyperbranched polyester shells were prepared for doxorubicin (DOX) delivery. First, rod-shaped mesoporous silica nanoparticles (MSNs) were obtained, then hydrophobic hyperbranched polyester Boltorn H40 (H40) was grafted on their surface. The H40 coated MSNs were next treated with amine-functionalized polyethylene glycol (PEG) to achieve the hydrophilic and pH-responsive material denoted as PEG-H40-MSNs. The experimental results showed that PEG-H40-MSNs were successfully synthesized. BET analysis showed that rod MSNs exhibits a type IV standard isotherm. TEM revealed that the thin gray polymer layer was formed around the SBA-15 particle with a diameter of around 150 nm. DOX was effectively loaded, which can be released according to the ambient pH inside the cell as follow: at pH 7.4, only 9.7% of the DOX was released after 48 h; as the pH decreased to 5.5, the cumulative release reached to 49% at the same time. PEG-H40-MSNs showed less than 1.6% of hemolytic activity and a slight effect on the liver and kidney of treated mice were observed at a high disposal dosage implying negligible toxicities were caused by PEG-H40-MSNs in both in vitro hemolysis analysis and in vivo biochemical in mice. However, the in vitro cytotoxicity evaluation of the DOX-PEG-H40-MSNs showed that the cell cytotoxicity of both pure DOX and DOX-loaded PEG-H40-MSNs generally enhanced by increasing the concentration of DOX. Graphical abstract Schematic of cellular uptake and DOX release of PEG-H40-MSNs nanoparticle.
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Affiliation(s)
- Reza Bafkary
- Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Shirin Ahmadi
- Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Faeze Fayazi
- Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Mehdi Karimi
- Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Yousef Fatahi
- Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | | | - Fatemeh Atyabi
- Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Rassoul Dinarvand
- Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran.
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30
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Abstract
OBJECTIVE Brain computer interfaces (BCIs) are slowly making their appearance on the consumer market, accompanied by a higher popularity among the general public. This new group of users requires easy-to-use headsets with robustness to non-precise placement. In this paper, an optimized fixed montage EEG headset for VEP BCIs is proposed. APPROACH The proposed layout covers only the most relevant area with large sensors to account for slight misplacement. To obtain large sensors, without having them physically available, we tie multiple sensors together and simulate the effect by averaging the signal of multiple sensors. MAIN RESULTS In simulations based on recorded 256-channel EEG data, it is shown that a circular center-surround configuration with sensor tying, leading to only eight channels covering a large part of the occipital lobe, can provide high performance and good robustness to misplacement. Automatically optimized layouts were unable to achieve better performance, demonstrating the utility of this manual design. Finally, the performance and benefits of sensor tying in the manual design are then validated in a physical experiment. SIGNIFICANCE The resulting proposed layout fulfills most requirements of an easy to use consumer EEG headset.
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Affiliation(s)
- S Ahmadi
- Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands
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31
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Ghalebi M, Tamizi E, Ahmadi S, Sheikhloo A, Nemati M. A Dispersive Liquid-Liquid Micro-Extraction Technique for the Pre-concentration and Quantification of Vitamin D 3 in Milk and Yogurt Samples Using a Non-Aqueous HPLC Method. Iran J Pharm Res 2019; 18:677-685. [PMID: 31531051 PMCID: PMC6706729 DOI: 10.22037/ijpr.2019.1100634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In present study, a DLLME-HPLC-UV method was developed and validated for the extraction, pre–concentration, and subsequently quantification of vitamin D3 (Vit D3) in milk and yogurt samples. In order to be able to extract Vit D3 from studied samples efficiently, the DLLME procedure was optimized with respect to the parameters affecting the extraction efficacy, where acetonitrile (2 mL as disperser solvent) resulting from the protein precipitation procedure was mixed with 80 µL carbon tetrachloride (as an extraction solvent) respectively. The extracted samples were quantitatively analyzed with a HPLC technique using a C8 column (250 mm × 4.6 mm, 5 μm) at room temperature (25 °C), mobile phase of acetonitrile/methanol (90:10% v/v) in isocratic elution mode at a flow rate of 1.2 mL/min and UV detection at 265 nm. The method validation results revealed that the method was linear in the concentration range of 2 to 60 ng/mL (r = 0.9997) with a LOD of 0.9 ng/mL and LLOQ of 2 ng/mL; the method was accurate (-2.1% ≤ RE% ≤ +0.6%) and precise (1.2% ≤RSD% ≤ 11.3%) and its recovery was in the range of 86.6 to 113.3%. The obtained results indicated that the method could be utilized as an easy to use technique for the monitoring Vit D3 in dairy products, especially milk and yogurt samples.
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Affiliation(s)
- Maryam Ghalebi
- Department of Pharmaceutical and Food Control, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Elnaz Tamizi
- Department of Pharmaceutical and Food Control, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Shirin Ahmadi
- Department of Pharmaceutical and Food Control, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ahad Sheikhloo
- Department of Pharmaceutical and Food Control, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahboob Nemati
- Department of Pharmaceutical and Food Control, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.,Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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32
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Pucca MB, Cerni FA, Oliveira IS, Jenkins TP, Argemí L, Sørensen CV, Ahmadi S, Barbosa JE, Laustsen AH. Bee Updated: Current Knowledge on Bee Venom and Bee Envenoming Therapy. Front Immunol 2019; 10:2090. [PMID: 31552038 PMCID: PMC6743376 DOI: 10.3389/fimmu.2019.02090] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 08/19/2019] [Indexed: 12/13/2022] Open
Abstract
Honey bees can be found all around the world and fulfill key pollination roles within their natural ecosystems, as well as in agriculture. Most species are typically docile, and most interactions between humans and bees are unproblematic, despite their ability to inject a complex venom into their victims as a defensive mechanism. Nevertheless, incidences of bee stings have been on the rise since the accidental release of Africanized bees to Brazil in 1956 and their subsequent spread across the Americas. These bee hybrids are more aggressive and are prone to attack, presenting a significant healthcare burden to the countries they have colonized. To date, treatment of such stings typically focuses on controlling potential allergic reactions, as no specific antivenoms against bee venom currently exist. Researchers have investigated the possibility of developing bee antivenoms, but this has been complicated by the very low immunogenicity of the key bee toxins, which fail to induce a strong antibody response in the immunized animals. However, with current cutting-edge technologies, such as phage display, alongside the rise of monoclonal antibody therapeutics, the development of a recombinant bee antivenom is achievable, and promising results towards this goal have been reported in recent years. Here, current knowledge on the venom biology of Africanized bees and current treatment options against bee envenoming are reviewed. Additionally, recent developments within next-generation bee antivenoms are presented and discussed.
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Affiliation(s)
- Manuela B. Pucca
- Medical School, Federal University of Roraima, Boa Vista, Brazil
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Felipe A. Cerni
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
- Department of Physics and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Isadora S. Oliveira
- Department of Physics and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Timothy P. Jenkins
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Lídia Argemí
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Christoffer V. Sørensen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
| | - Shirin Ahmadi
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
- Department of Biotechnology and Biosafety, Eskişehir Osmangazi University, Eskişehir, Turkey
| | - José E. Barbosa
- Department of Biochemistry and Immunology, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Andreas H. Laustsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Lyngby, Denmark
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33
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Knudsen C, Ledsgaard L, Dehli RI, Ahmadi S, Sørensen CV, Laustsen AH. Engineering and design considerations for next-generation snakebite antivenoms. Toxicon 2019; 167:67-75. [DOI: 10.1016/j.toxicon.2019.06.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 05/22/2019] [Accepted: 06/03/2019] [Indexed: 11/27/2022]
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34
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Ahmadi S, Azhari SJ. A LP, Very High-CMRR, Wide-Bandwidth FDCCII-Based CMIA Adapted to Both Current and Voltage Inputs. Arab J Sci Eng 2019. [DOI: 10.1007/s13369-018-3601-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Ahmadi S, Akbari A. Prediction of the adsorption coefficients of some aromatic compounds on multi-wall carbon nanotubes by the Monte Carlo method. SAR QSAR Environ Res 2018; 29:895-909. [PMID: 30332923 DOI: 10.1080/1062936x.2018.1526821] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [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: 07/12/2018] [Accepted: 09/18/2018] [Indexed: 06/08/2023]
Abstract
In this investigation, quantitative structure-property relationship (QSPR) modelling of adsorption coefficients of 69 aromatic compounds on multi-wall carbon nanotubes (MWCNTs) was studied using the Monte Carlo method. QSPR models were calculated with CORAL software, and optimal descriptors were calculated with the simplified molecular input line entry system (SMILES) and hydrogen-suppressed molecular graphs (HSGs). The aromatic compound data set was randomly split into training, invisible training, calibration and validation sets. Analysis of three probes of the Monte Carlo optimization with three random splits was done. The results from three random splits displayed robust, very simple, predictable and reliable models for the training, invisible training, calibration and validation sets with a coefficient of determination (r2) equal to 0.9463-0.8528, 0.9020-0.8324, 0.9606-0.9178 and 0.9573-0.8228, respectively. As a result, the models obtained help to identify the hybrid descriptors for the increase and the decrease of the adsorption coefficient of aromatic compounds on MWCNTs. This simple QSPR model can be used for the prediction of the adsorption coefficient of numerous aromatic compounds on MWCNTs.
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Affiliation(s)
- S Ahmadi
- a Department of Chemistry , Kermanshah Branch, Islamic Azad University , Kermanshah , Iran
| | - A Akbari
- a Department of Chemistry , Kermanshah Branch, Islamic Azad University , Kermanshah , Iran
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36
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Nemati M, Nofozi S, Ahmadi S, Monajjemzadeh F. Quality Control of the Migration of Bisphenol a from Plastic Packaging into Iranian Brands of Food Grade Oils. Pharm Sci 2018. [DOI: 10.15171/ps.2018.21] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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37
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Sheikholeslami-Vatani D, Ahmadi S, Chehri B, Tadibi V. The effect of changes in concentric-eccentric contraction time ratio on hormonal response to resistance exercise in trained men. Sci Sports 2018. [DOI: 10.1016/j.scispo.2017.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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Shokrollahi A, Ahmadi S. Determination of trace amounts of Brown HT as a food dye by a CPE-scanometry method. Journal of Taibah University for Science 2018. [DOI: 10.1016/j.jtusci.2016.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | - S. Ahmadi
- Department of Chemistry, Yasouj University Yasouj Iran
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Anell-Olofsson M, Ahmadi S, Lönnqvist PA, Eksborg S, von Horn H, Bartocci M. Plasma concentrations of alpha-1-acid glycoprotein in preterm and term newborns: influence of mode of delivery and implications for plasma protein binding of local anaesthetics. Br J Anaesth 2018; 121:427-431. [PMID: 30032881 DOI: 10.1016/j.bja.2018.01.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 12/08/2017] [Accepted: 02/07/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Alpha-1-acid glycoprotein (AAGP) is an acute-phase protein with high affinity for amide local anaesthetics (LAs), and a major determinant of free and potentially toxic concentrations of LAs in plasma. Neonates are known to have lower plasma concentrations of AAGP than adults, and are at risk of developing high free concentrations of LAs. Data regarding AAGP in newborns are so far sparse. The aim of this study was to determine plasma concentrations of AAGP after delivery of preterm and term infants, and to investigate correlations between AAGP and gestational age, birth weight, gender, and mode of delivery. METHODS In this prospective observational study, blood was sampled from umbilical cords of 70 newborn infants born at gestational weeks 27-42 immediately after delivery. Blood samples were subsequently analysed for AAGP plasma concentrations with an immunoturbidimetric assay. RESULTS We found higher concentrations of AAGP in infants born vaginally compared with those who were delivered by elective Caesarean section [median (inter-quartile range) 0.189 g litre-1 (0.142-0.263 g litre-1) vs 0.110 g litre-1 (0.094-0.157 g litre-1; P=0.0003)], respectively. There was a correlation between gestational age and AAGP concentrations (r=0.50; P=0.011), with significantly higher concentrations in the more mature infants. Gender and birth weight did not appear to influence the plasma concentrations of AAGP. CONCLUSIONS Alpha-1-acid glycoprotein concentrations in newborns are influenced both by gestational age and mode of delivery. Thus, when dosing local anaesthetics in a parturient, these factors should be taken into account.
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Affiliation(s)
- M Anell-Olofsson
- Department of Paediatric Anaesthesia, Intensive Care and ECMO Services, Sweden; Department of Women's and Children's Health, Karolinska Institutet, Sweden.
| | - S Ahmadi
- Department of Women's and Children's Health, Karolinska Institutet, Sweden
| | - P A Lönnqvist
- Department of Paediatric Anaesthesia, Intensive Care and ECMO Services, Sweden; Department of Physiology and Pharmacology, Karolinska Institutet, Sweden
| | - S Eksborg
- Department of Women's and Children's Health, Karolinska Institutet, Sweden; Department of Paediatric Oncology, Sweden
| | - H von Horn
- Division of Clinical Chemistry, Department of Laboratory Medicine, Sweden
| | - M Bartocci
- Department of Women's and Children's Health, Karolinska Institutet, Sweden; Department of Neonatology, Karolinska University Hospital, Stockholm, Sweden
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Hosseinian A, Vessally E, Bekhradnia A, Ahmadi S, Kheirollahi Nezhad PD. Interaction of α-Cyano-4-hydroxycinnamic Acid Drug with Inorganic BN Nanocluster: A Density Functional Study. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-018-0778-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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41
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Mastikhin IV, Bade KM, Ahmadi S. A rapid magnetization preparation for MRI measurements of sprays. J Magn Reson 2017; 283:52-60. [PMID: 28881233 DOI: 10.1016/j.jmr.2017.08.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 08/25/2017] [Accepted: 08/26/2017] [Indexed: 06/07/2023]
Abstract
The process of spray atomization, i.e., the transformation of a continuous liquid jet into μm-sub-mm sized droplets, is ubiquitous in industry yet quite complex to analyze theoretically and study experimentally. One of the main strengths of MRI is its ability to sensitize spatially-resolved NMR signal to a wide variety of physical and chemical parameters. However, standard preparation schemes are difficult to employ for studies of sprays due to sprays' fast speeds (>10-20m/s). In addition, sprays are usually low-density systems, leading to a poor SNR and a need for massive signal averaging and long acquisition time. In this paper, we reduced the interval between the preparation and the readout stages by performing SPI encoding on the rising gradients. This also enabled the use of 90-degree flip angles to maximize the spray signal and saturate the stationary water signal while avoiding unwanted slice-selection. The use of gradients during preparation stage was eliminated due to their time-consuming rise and stabilization times limiting possible preparation schemes to a combination of RF pulses and delays. The two preparation schemes presented here are Time-of-Flight (TOF) and T1ρ-weighting schemes. The total duration of the sequence (without TR) was 240-1100μs for the TOF and 410μs for T1ρ. The T1ρ prepared images of the near-atomization region (11 spin-locking frequencies, 0-15kHz) showed a strong signal attenuation at higher frequencies. In series of TOF images the clearly noticeable displacement of the liquid parcel can be utilized to measure spray speeds.
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Affiliation(s)
- I V Mastikhin
- Department of Physics, University of New Brunswick, Fredericton E3B 5A3, NB, Canada.
| | - K M Bade
- Spraying Systems Co., Spray Analysis and Research Services, Wheaton, IL, USA
| | - S Ahmadi
- Department of Physics, University of New Brunswick, Fredericton E3B 5A3, NB, Canada
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Nasiri Kalmarzi R, Ataee P, Mansori M, Moradi G, Ahmadi S, Kaviani Z, Khalafi B, Kooti W. Serum levels of adiponectin and leptin in asthmatic patients and its relation with asthma severity, lung function and BMI. Allergol Immunopathol (Madr) 2017; 45:258-264. [PMID: 28411906 DOI: 10.1016/j.aller.2016.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 09/12/2016] [Accepted: 09/21/2016] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Asthma is one of the diseases which has a high prevalence in developed and developing countries. The relationship between asthma and obesity has always been focused by researchers. In this field, adipokines, especially adiponectin and leptin have highly attended by the scientist. The aim of this study was to determine the serum level of adiponectin, leptin and the leptin/adiponectin ratio in asthmatic patients and its relationship with disease severity, lung function and BMI (body mass index). METHODS In this cross-sectional study, 90 asthmatic women admitted to the tertiary referral hospital in Kurdistan province - Iran, were examined. First, BMI was measured and then pulmonary function tests were performed in all asthmatics patient. Forced expiratory volume in 1s (FEV1), forced vital capacity (FVC), and FEV1/FVC, were measured. At the end, blood samples were collected and serum level of adiponectin and leptin were measured by ELISA method. RESULT Serum leptin and leptin/adiponectin levels correlated positively with asthma severity and BMI (p=0.0001), but there was no correlation between adiponectin level with asthma severity and BMI (p>0.05), also serum leptin and leptin/adiponectin levels inversely correlated with FEV1 and FVC in patient (p=0.0001). CONCLUSION Asthma is linked with obesity, and there is an association between asthma severity and BMI with serum leptin and leptin/adiponectin levels, but our results do not support a significant role of adiponectin in obesity or asthma.
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Manesh JYY, Shafiee R, Pedram B, Malayeri HZ, Mohajer S, Ahmadi S, Ahmadi S, Javanbakht J, Mokarizadeh A, Khadivar F. Retraction Note to: Improving the diagnosis, treatment, and biology patterns of feline mammary intraepithelial lesions: a potential model for human breast masses with evidence from epidemiologic and cytohistopathologic studies. Tumour Biol 2016; 37:10.1007/s13277-016-5472-5. [PMID: 27817084 DOI: 10.1007/s13277-016-5472-5] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- Javad Yaghoobi Yeganeh Manesh
- Gradute of Islamic Azad University of Shahrekord, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
| | - Radmehr Shafiee
- Graduate, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran
| | - Behnam Pedram
- Department of Pathobiology, Susangerd Branch, Islamic Azad University, Susangerd, Iran
| | - Hamed Zamankhan Malayeri
- Department of Internal Medicine, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran
| | - Sheida Mohajer
- Chronic Respiratory Disease Research Center, National Research Institue of Tuberculosis and Lung Diseases, Massih Daneshvary Hospital, Shahid Beheshti University of Medicine, Tehran, Iran
| | - Sharareh Ahmadi
- Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Shirin Ahmadi
- Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Javad Javanbakht
- Department of Pathology, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran.
| | - Aram Mokarizadeh
- Department of Immunology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran.
| | - Farshid Khadivar
- Graduate, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran
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Karamali M, Dadkhah F, Sadrkhanlou M, Jamilian M, Ahmadi S, Tajabadi-Ebrahimi M, Jafari P, Asemi Z. Effects of probiotic supplementation on glycaemic control and lipid profiles in gestational diabetes: A randomized, double-blind, placebo-controlled trial. Diabetes & Metabolism 2016; 42:234-41. [DOI: 10.1016/j.diabet.2016.04.009] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 04/16/2016] [Accepted: 04/22/2016] [Indexed: 12/28/2022]
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Almaraashi M, John R, Hopgood A, Ahmadi S. Learning of interval and general type-2 fuzzy logic systems using simulated annealing: Theory and practice. Inf Sci (N Y) 2016. [DOI: 10.1016/j.ins.2016.03.047] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ahmadi S, Peymanfard M. The effect of social capital on improving productivity of human resources in the project of engineering, procurement and construction Bandar Abbas gas condensate refinery. J Fundam and Appl Sci 2016. [DOI: 10.4314/jfas.v8i2s.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Ahmadi S, Sharifi M, Salehi R. Locked nucleic acid inhibits miR-92a-3p in human colorectal cancer, induces apoptosis and inhibits cell proliferation. Cancer Gene Ther 2016; 23:199-205. [PMID: 27199220 DOI: 10.1038/cgt.2016.10] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 03/02/2016] [Accepted: 03/02/2016] [Indexed: 12/13/2022]
Abstract
MicroRNAs (miRNAs) are a type of small noncoding RNAs that have a vital role in basic biological processes such as cellular growth, division and apoptosis. A change in the expression of miRNAs can induce many diseases. Recently, the role of miRNA in some of the cancers as a tumor suppressor and oncogene has been recognized. Several studies have proved that miR-92a-3p acts as an oncogene in colorectal cancer (CRC). We studied CRC by inhibiting miR-92a-3p in SW48 cells (human colorectal cancer cell line) that were transfected with locked nucleic acid (LNA). At different times, the expression level of miR-92a-3p, cell vitality, apoptosis and necrosis were studied by qRT-PCR, MTT, Annexin-V and propidiumiodide. Our results showed that the expression of miR-92a-3p and proliferation of SW48 cells were decreased, and also a high percentage of SW48 cells were exposed to apoptosis and necrosis (P⩽0.005). Our study showed that the inhibition of miR-92a-3p with LNA inhibited cell proliferation and induced apoptosis and necrosis in CRC.
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Affiliation(s)
- S Ahmadi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - M Sharifi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - R Salehi
- Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Delshad V, Shemshad H, Moradian M, Ahmadi S, Malkyan L, Sabzalizadeh S. The Effect of Applying Global Positioning System in Ambulances on Response Time of Tehran Emergency Medical Service. HDQ 2016. [DOI: 10.15412/j.hdq.09010302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Kargar S, Shiryazdi SM, Zare M, Mirshamsi MH, Ahmadi S, Neamatzadeh H. Comparison of postoperative short-term complications after laparoscopic transabdominal preperitoneal (TAPP) versus Lichtenstein tension free inguinal hernia repair: a randomized trial study. MINERVA CHIR 2015; 70:83-89. [PMID: 25017958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM The aim of this randomized trial was to compare short-term postoperative complications of laparoscopic transabdominal preperitoneal (TAPP) and Lichtenstein tension free hernia repair. METHODS A total of 120 patients who went inguinal hernia repair at Shahid Sadoughi university training hospital from April 2011 to August 2013 were randomized into two TAPP (N.=60) and Lichtenstein (N.=60) repair group. Follow-up occurred within 6 weeks. The postoperative assessments included pain score (VAS), hematoma/seroma, urinary retention, wound infection incidence, and duration of hospital stay. RESULTS Pain was the most common symptoms in both groups. The TAPP group patients significantly had experienced less postoperative pain than the Lichtenstein group in all moments (P<0.05). TAPP group had lower incidence of hematoma (TAPP, 6.6% vs. Lichtenstein 13.3%; P=0.67), seroma (TAPP 10% vs. Lichtenstein 13.3%; P=1.00), and infection (TAPP 0 vs. Lichtenstein 1.6%; P=0.67). However, no differences between the 2 groups were found in terms of postoperative complications. In TAPP group mean of hospital stay significantly was less than Lichtenstein group (TAPP, 8.13±2.19 vs. Lichtenstein, 13.15±1.5 days; P<0.001). CONCLUSION The laparoscopic TAPP repair is safer and less complicated approach to inguinal hernia repair. The two main short-term advantages of the laparoscopic TAPP repair with the tension free Lichtenstein repair were less postoperative pain and earlier return to the normal life activities. No difference was seen in overall complications.
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Affiliation(s)
- S Kargar
- Department of Surgery, Shahid Sadoughi University of Medical Sciences and Health Services, Yazd, Iran -
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Khamoushi F, Ahmadi S, Karami-Matin B, Ahmadi-Jouybari T, Mirzaei-Alavijeh M, Mahboubi M, Ataee M. Prevalence and Socio-Demographic Characteristics Related to Stress, Anxiety, and Depression among Patients with Major Tha-lassemia in the Kermanshah County. ACTA ACUST UNITED AC 2015. [DOI: 10.15412/j.jbtw.01040304] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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