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Saleem A, Awan T, Akhtar MF. A comprehensive review on endocrine toxicity of gaseous components and particulate matter in smog. Front Endocrinol (Lausanne) 2024; 15:1294205. [PMID: 38352708 PMCID: PMC10863453 DOI: 10.3389/fendo.2024.1294205] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 01/10/2024] [Indexed: 02/16/2024] Open
Abstract
Smog is a form of extreme air pollution which comprises of gases such as ozone, sulfur dioxide, nitrogen and carbon oxides, and solid particles including particulate matter (PM2.5 and PM10). Different types of smog include acidic, photochemical, and Polish. Smog and its constituents are hazardaous to human, animals, and plants. Smog leads to plethora of morbidities such as cancer, endocrine disruption, and respiratory and cardiovascular disorders. Smog components alter the activity of various hormones including thyroid, pituitary, gonads and adrenal hormones by altering regulatory genes, oxidation status and the hypothalamus-pituitary axis. Furthermore, these toxicants are responsible for the development of metabolic disorders, teratogenicity, insulin resistance, infertility, and carcinogenicity of endocrine glands. Avoiding fossil fuel, using renewable sources of energy, and limiting gaseous discharge from industries can be helpful to avoid endocrine disruption and other toxicities of smog. This review focuses on the toxic implications of smog and its constituents on endocrine system, their toxicodynamics and preventive measures to avoid hazardous health effects.
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Affiliation(s)
- Ammara Saleem
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Tanzeela Awan
- Department of Pharmacy, The Women University Multan, Multan, Pakistan
| | - Muhammad Furqan Akhtar
- Riphah Institute of Pharmaceutical Sciences, Riphah International University, Lahore, Pakistan
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Saher U, Ovais Omer M, Javeed A, Ahmad Anjum A, Rehman K, Awan T. Soluble laticifer proteins from Calotropis procera as an effective candidates for antimicrobial therapeutics. Saudi J Biol Sci 2023; 30:103659. [PMID: 37181638 PMCID: PMC10172833 DOI: 10.1016/j.sjbs.2023.103659] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/24/2023] [Accepted: 04/16/2023] [Indexed: 05/16/2023] Open
Abstract
Calotropis procera is a latex-producing plant with plenty of pharmacologically active compounds. The principal motivation behind this study was to separate and characterize laticifer proteins to check their antimicrobial potential. Laticifer proteins were separated by gel filtration chromatography (GFC) and investigated using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The SDS-PAGE assay detected proteins of molecular weights of 10 to 30 kDa but most of them were in the range of 25 to 30 kDa. The soluble laticifer proteins (SLPs) were tested against Gram-positive bacteria i.e., Streptococcus pyogenes and Staphylococcus aureus whereas Escherichia coli and Pseudomonas aeruginosa were tested as Gram-negative bacteria, we determined a profound anti-bacterial activity of these proteins. In addition, SLPs were also investigated against Candida albicans via the agar disc diffusion method which also showed significant anti-fungal activity. SLP exhibited antibacterial activity against P. aeruginosa, E. coli, and S. aureus with a minimum inhibitory concentration (MIC) of 2.5 mg/mL for each, while MIC was found at 0.625 mg/mL for S. pyogenes and 1.25 mg/mL for C. albicans. Moreover, enzymatic activity evaluation of SLP showed the proteolytic nature of these proteins, and this proteolytic activity was greatly enhanced after reduction which might be due to the presence of cysteine residues in the protein structure. The activity of the SLPs obtained from the latex of C. procera can be associated with the involvement of enzymes either proteases or, protease inhibitors and/or peptides.
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Affiliation(s)
- Uzma Saher
- Department of Pharmacy, The Women University, Multan 60000, Pakistan Department of Pharmacology and Toxicology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Muhammad Ovais Omer
- Department of Pharmacology and Toxicology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
- Corresponding author at: Department of Pharmacology and Toxicology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan.
| | - Aqeel Javeed
- Department of Pharmacology and Toxicology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Aftab Ahmad Anjum
- Department of Microbiology, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Kanwal Rehman
- Department of Pharmacy, The Women University, Multan 60000, Pakistan
| | - Tanzeela Awan
- Department of Pharmacy, The Women University, Multan 60000, Pakistan
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Saher U, Omer MO, Javeed A, Anjum AA, Rehman K, Awan T, Saleem G, Mobeen A. Functional Studies of Cytogenotoxic Potential of Laticifer Proteins of Calotropis procera against Viral Disease. ACS Omega 2023; 8:7119-7127. [PMID: 36844567 PMCID: PMC9948205 DOI: 10.1021/acsomega.2c08102] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 02/03/2023] [Indexed: 05/28/2023]
Abstract
Plant products are widely used for health and disease management. However, besides their therapeutic effects, some plants also have potential toxic activity. Calotropis procera is a well-known laticifer plant having pharmacologically active proteins playing a therapeutically significant role in curing diseases like inflammatory disorders, respiratory diseases, infectious diseases, and cancers. The present study was aimed to investigate the antiviral activity and toxicity profile of the soluble laticifer proteins (SLPs) obtained from C. procera. Different doses of rubber free latex (RFL) and soluble laticifer protein (ranging from 0.019 to 10 mg/mL) were tested. RFL and SLPs were found to be active in a dose-dependent manner against NDV (Newcastle disease virus) in chicken embryos. Embryotoxicity, cytotoxicity, genotoxicity, and mutagenicity of RFL and SLP were examined on chicken embryos, BHK-21 cell lines, human lymphocytes, and Salmonella typhimurium, respectively. It was revealed that RFL and SLP possess embryotoxic, cytotoxic, genotoxic, and mutagenic activity at higher doses (i.e., 1.25-10 mg/mL), while low doses were found to be safe. It was also observed that SLP showed a rather safer profile as compared to RFL. This might be due to the filtration of some small molecular weight compounds at the time of purification of SLPs through a dialyzing membrane. We suggest that SLPs could be used therapeutically against viral disorders but the dose should be critically monitored.
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Affiliation(s)
- Uzma Saher
- Department
of Pharmacology and Toxicology, University
of Veterinary and Animal Sciences, Lahore 54000, Pakistan
- Department
of Pharmacy, The Women University, Multan 60000, Pakistan
| | - Muhammad Ovais Omer
- Department
of Pharmacology and Toxicology, University
of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Aqeel Javeed
- Department
of Pharmacology and Toxicology, University
of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Aftab Ahmad Anjum
- Department
of Microbiology, University of Veterinary
and Animal Sciences, Lahore 54000, Pakistan
| | - Kanwal Rehman
- Department
of Pharmacy, The Women University, Multan 60000, Pakistan
| | - Tanzeela Awan
- Department
of Pharmacy, The Women University, Multan 60000, Pakistan
| | - Gulbeena Saleem
- Department
of Pathology, University of Veterinary and
Animal Sciences, Lahore 54000, Pakistan
| | - Ameena Mobeen
- Environmental
Toxicology Laboratory, National Institute
for Biotechnology and Genetic Engineering (NIBGE) Faisalabad 37020, Pakistan
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Awan T, Babendreyer A, Mahmood Alvi A, Düsterhöft S, Lambertz D, Bartsch JW, Liedtke C, Ludwig A. Expression levels of the metalloproteinase ADAM8 critically regulate proliferation, migration and malignant signalling events in hepatoma cells. J Cell Mol Med 2021; 25:1982-1999. [PMID: 33314720 PMCID: PMC7882935 DOI: 10.1111/jcmm.16015] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/01/2020] [Accepted: 10/05/2020] [Indexed: 12/14/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most common metastatic tumours. Tumour growth and metastasis depend on the induction of cell proliferation and migration by various mediators. Here, we report that the A Disintegrin and Metalloproteinase (ADAM) 8 is highly expressed in murine HCC tissues as well as in murine and human hepatoma cell lines Hepa1-6 and HepG2, respectively. To establish a dose-dependent role of different ADAM8 expression levels for HCC progression, ADAM8 expression was either reduced via shRNA- or siRNA-mediated knockdown or increased by using a retroviral overexpression vector. These two complementary approaches revealed that ADAM8 expression levels correlated positively with proliferation, clonogenicity, migration and matrix invasion and negatively with apoptosis of hepatoma cells. Furthermore, the analysis of pro-migratory and proliferative signalling pathways revealed that ADAM8 expression level was positively associated with expression of β1 integrin as well as with the activation of focal adhesion kinase (FAK), mitogen-activated protein kinase (MAPK), Src kinase and Rho A GTPase. Finally, up-regulation of promigatory signalling and cell migration was also seen with a proteolytically inactive ADAM8 mutant. These findings reveal that ADAM8 is critically up-regulated in hepatoma cells contributes to cell proliferation and survival and furthermore induces pro-migratory signalling pathways independently of its proteolytic activity. By this, ADAM8 can promote cell functions most relevant for HCC growth and metastasis.
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Affiliation(s)
- Tanzeela Awan
- Institute of Molecular PharmacologyRWTH Aachen UniversityAachenGermany
| | - Aaron Babendreyer
- Institute of Molecular PharmacologyRWTH Aachen UniversityAachenGermany
| | - Abid Mahmood Alvi
- Institute of Molecular PharmacologyRWTH Aachen UniversityAachenGermany
| | - Stefan Düsterhöft
- Institute of Molecular PharmacologyRWTH Aachen UniversityAachenGermany
| | - Daniela Lambertz
- Department of Medicine IIIUniversity Hospital RWTH Aachen UniversityAachenGermany
| | - Jörg W. Bartsch
- Department of NeurosurgeryPhilipps University MarburgUniversity Hospital MarburgMarburgGermany
| | - Christian Liedtke
- Department of Medicine IIIUniversity Hospital RWTH Aachen UniversityAachenGermany
| | - Andreas Ludwig
- Institute of Molecular PharmacologyRWTH Aachen UniversityAachenGermany
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Schick D, Babendreyer A, Wozniak J, Awan T, Noels H, Liehn E, Bartsch JW, Vlacil AK, Grote K, Zayat R, Goetzenich A, Ludwig A, Dreymueller D. Elevated expression of the metalloproteinase ADAM8 associates with vascular diseases in mice and humans. Atherosclerosis 2019; 286:163-171. [PMID: 30910225 DOI: 10.1016/j.atherosclerosis.2019.03.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 02/17/2019] [Accepted: 03/12/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Members of the family of a disintegrin and metalloproteinases (ADAMs) and their substrates have been previously shown to modulate the inflammatory response in cardiac diseases, but studies investigating the relevance of ADAM8 are still rare. Our aim is to provide evidence for the inflammatory dysregulation of ADAM8 in vascular diseases and its association with disease severity. METHODS Western-type diet fed Apoe-/- and Ldlr-/- mice and artery ligation served as murine model for atherosclerosis and myocardial infarction, respectively. Human bypass grafts were used to study the association with coronary artery disease (CAD), with the simplified acute physiology score II (SAPS II) as a measure of postoperative organ dysfunction. Human primary vascular and blood cells were analyzed under basal and inflammatory conditions. mRNA levels were determined by RT-qPCR, ADAM8 protein levels by ELISA, immunohistochemistry or flow cytometry. RESULTS ADAM8/ADAM8 expression is associated with atherosclerosis and CAD such as myocardial infarction in both mice and humans, especially in endothelial cells and leukocytes. We observed a strong in vivo and in vitro correlation of ADAM8 with the vascular disease markers VCAM-1, ICAM-1, TNF, IL-6, and CCL-2. Serum analysis revealed a significant elevation of soluble ADAM8 serum levels correlating with soluble CXCL16 levels and SAPS II. CONCLUSIONS We demonstrate a general association of ADAM8 with cardiovascular diseases in mice and humans predominantly acting in endothelial cells and leukocytes. The correlation with postoperative organ dysfunctions in CAD patients highlights the value of further studies investigating the specific function of ADAM8 in cardiovascular diseases.
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Affiliation(s)
- Daniel Schick
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Aaron Babendreyer
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Justyna Wozniak
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Tanzeela Awan
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Heidi Noels
- Institute of Molecular Cardiovascular Research, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Elisa Liehn
- Institute of Molecular Cardiovascular Research, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany; National Heart Center Singapore, Singapore, Human Genetic Laboratory, University of Medicine Craiova, Romania
| | - Jörg-W Bartsch
- Department of Neurosurgery, Philipps University Marburg, University Hospital Marburg, Baldingerstrasse, 35033, Marburg, Germany
| | - Ann-Kathrin Vlacil
- Clinic for Internal Medicine, Cardiology, Philipps University Marburg, University Hospital Marburg, Marburg, Germany
| | - Karsten Grote
- Clinic for Internal Medicine, Cardiology, Philipps University Marburg, University Hospital Marburg, Marburg, Germany
| | - Rashad Zayat
- Department of Thoracic and Cardiovascular Surgery, RWTH Aachen University Hospital, Pauwelsstr. 30, 52066, Aachen, Germany
| | - Andreas Goetzenich
- Department of Thoracic and Cardiovascular Surgery, RWTH Aachen University Hospital, Pauwelsstr. 30, 52066, Aachen, Germany
| | - Andreas Ludwig
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Daniela Dreymueller
- Institute of Experimental and Clinical Pharmacology and Toxicology, PZMS, ZHMB, Saarland University, UKS Bldg. 46, 66421, Homburg, Germany.
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Griffin DR, Dickenson EJ, O'Donnell J, Agricola R, Awan T, Beck M, Clohisy JC, Dijkstra HP, Falvey E, Gimpel M, Hinman RS, Hölmich P, Kassarjian A, Martin HD, Martin R, Mather RC, Philippon MJ, Reiman MP, Takla A, Thorborg K, Walker S, Weir A, Bennell KL. The Warwick Agreement on femoroacetabular impingement syndrome (FAI syndrome): an international consensus statement. Br J Sports Med 2017; 50:1169-76. [PMID: 27629403 DOI: 10.1136/bjsports-2016-096743] [Citation(s) in RCA: 568] [Impact Index Per Article: 81.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/31/2016] [Indexed: 12/29/2022]
Abstract
The 2016 Warwick Agreement on femoroacetabular impingement (FAI) syndrome was convened to build an international, multidisciplinary consensus on the diagnosis and management of patients with FAI syndrome. 22 panel members and 1 patient from 9 countries and 5 different specialties participated in a 1-day consensus meeting on 29 June 2016. Prior to the meeting, 6 questions were agreed on, and recent relevant systematic reviews and seminal literature were circulated. Panel members gave presentations on the topics of the agreed questions at Sports Hip 2016, an open meeting held in the UK on 27-29 June. Presentations were followed by open discussion. At the 1-day consensus meeting, panel members developed statements in response to each question through open discussion; members then scored their level of agreement with each response on a scale of 0-10. Substantial agreement (range 9.5-10) was reached for each of the 6 consensus questions, and the associated terminology was agreed on. The term 'femoroacetabular impingement syndrome' was introduced to reflect the central role of patients' symptoms in the disorder. To reach a diagnosis, patients should have appropriate symptoms, positive clinical signs and imaging findings. Suitable treatments are conservative care, rehabilitation, and arthroscopic or open surgery. Current understanding of prognosis and topics for future research were discussed. The 2016 Warwick Agreement on FAI syndrome is an international multidisciplinary agreement on the diagnosis, treatment principles and key terminology relating to FAI syndrome.Author note The Warwick Agreement on femoroacetabular impingement syndrome has been endorsed by the following 25 clinical societies: American Medical Society for Sports Medicine (AMSSM), Association of Chartered Physiotherapists in Sports and Exercise Medicine (ACPSEM), Australasian College of Sports and Exercise Physicians (ACSEP), Austian Sports Physiotherapists, British Association of Sports and Exercise Medicine (BASEM), British Association of Sport Rehabilitators and Trainers (BASRaT), Canadian Academy of Sport and Exercise Medicine (CASEM), Danish Society of Sports Physical Therapy (DSSF), European College of Sports and Exercise Physicians (ECOSEP), European Society of Sports Traumatology, Knee Surgery and Arthroscopy (ESSKA), Finnish Sports Physiotherapist Association (SUFT), German-Austrian-Swiss Society for Orthopaedic Traumatologic Sports Medicine (GOTS), International Federation of Sports Physical Therapy (IFSPT), International Society for Hip Arthroscopy (ISHA), Groupo di Interesse Specialistico dell'A.I.F.I., Norwegian Association of Sports Medicine and Physical Activity (NIMF), Norwegian Sports Physiotherapy Association (FFI), Society of Sports Therapists (SST), South African Sports Medicine Association (SASMA), Sports Medicine Australia (SMA), Sports Doctors Australia (SDrA), Sports Physiotherapy New Zealand (SPNZ), Swedish Society of Exercise and Sports Medicine (SFAIM), Swiss Society of Sports Medicine (SGMS/SGSM), Swiss Sports Physiotherapy Association (SSPA).
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Affiliation(s)
- D R Griffin
- Warwick Medical School, University of Warwick, Coventry, UK University Hospitals of Coventry and Warwickshire NHS Trust, Coventry, UK
| | - E J Dickenson
- Warwick Medical School, University of Warwick, Coventry, UK University Hospitals of Coventry and Warwickshire NHS Trust, Coventry, UK
| | - J O'Donnell
- Hip Arthroscopy Australia, Melbourne, Victoria, Australia St Vincents Private Hospital, East Melbourne, Victoria, Australia
| | - R Agricola
- Department of Orthopaedics, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - T Awan
- Medsport, Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - M Beck
- Department of Clinic of Orthopaedic and Trauma Surgery, Luzerner Kantonspital, Luzern, Switzerland
| | - J C Clohisy
- Department of Orthopaedic Surgery, Washington University School of Medicine St. Louis, St. Louis, Missouri, USA
| | - H P Dijkstra
- Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - E Falvey
- Sports Surgery Clinic, Dublin, Ireland Department of Medicine, University College Cork, Cork, Ireland
| | | | - R S Hinman
- Department of Physiotherapy, The University of Melbourne, Melbourne, Victoria, Australia
| | - P Hölmich
- Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar Department of Orthopaedic Surgery, Sports Orthopaedic Research Center (SORC-C), Copenhagen University Hospital, Amager-Hvidovre, Denmark
| | - A Kassarjian
- Corades, LLC, Brookline, Massachusetts, USA Medical Service, Madrid Open Tennis, Madrid, Spain
| | - H D Martin
- Hip Preservation Center, Baylor University Medical Center at Dallas, Dallas, Texas, USA
| | - R Martin
- Rangos School of Health Sciences, Physical Therapy, Duquesne University, Pittsburgh, Pennsylvania, USA UPMC Center for Sports Medicine, Pittsburgh, Pennsylvania, USA
| | - R C Mather
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - M J Philippon
- Steadman Philippon Research Institute, Vail, Colorado, USA
| | - M P Reiman
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - A Takla
- Hip Arthroscopy Australia, Melbourne, Victoria, Australia Australian Sports Physiotherapy Department of Physiotherapy, The University of Melbourne, Centre for Health, Exercise and Sports Medicine, Melbourne, Victoria, Australia Bond University
| | - K Thorborg
- Department of Orthopaedic Surgery, Sports Orthopaedic Research Center (SORC-C), Copenhagen University Hospital, Amager-Hvidovre, Denmark
| | | | - A Weir
- Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar Amsterdam Centre for Evidence-based Sports Medicine, Academic Medical Centre, Amsterdam, The Netherlands
| | - K L Bennell
- Department of Physiotherapy, The University of Melbourne, Centre for Health, Exercise and Sports Medicine, Melbourne, Victoria, Australia
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Zerr I, Pocchiari M, Collins S, Brandel JP, de Pedro Cuesta J, Knight RS, Bernheimer H, Cardone F, Delasnerie-Lauprêtre N, Cuadrado Corrales N, Ladogana A, Bodemer M, Fletcher A, Awan T, Ruiz Bremón A, Budka H, Laplanche JL, Will RG, Poser S. Analysis of EEG and CSF 14-3-3 proteins as aids to the diagnosis of Creutzfeldt-Jakob disease. Neurology 2000; 55:811-5. [PMID: 10994001 DOI: 10.1212/wnl.55.6.811] [Citation(s) in RCA: 311] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To improve diagnostic criteria for sporadic Creutzfeldt-Jakob disease (CJD). METHODS Pooled data on initial and final diagnostic classification of suspected CJD patients were accumulated, including results of investigations derived from a coordinated multinational study of CJD. Prospective analysis for a comparison of clinical and neuropathologic diagnoses and evaluation of the sensitivity and specificity of EEG and 14-3-3 CSF immunoassay were conducted. RESULTS Data on 1,003 patients with suspected CJD were collected using a standard questionnaire. After follow-up was carried out, complete clinical data and neuropathologic diagnoses were available in 805 cases. In these patients, the sensitivity of the detection of periodic sharp wave complexes in the EEG was 66%, with a specificity of 74%. The detection of 14-3-3 proteins in the CSF correlated with the clinical diagnosis in 94% (sensitivity). The specificity (84%) was higher than that of EEG. A combination of both investigations further increased the sensitivity but decreased the specificity. CONCLUSIONS Incorporation of CSF 14-3-3 analysis in the diagnostic criteria for CJD significantly increases the sensitivity of case definition. Amended diagnostic criteria for CJD are proposed.
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Affiliation(s)
- I Zerr
- Klinik und Poliklinik für Neurologie, Georg-August-Universität, Göttingen, Germany
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Puoti G, Rossi G, Giaccone G, Awan T, Lievens PM, Defanti CA, Tagliavini F, Bugiani O. Polymorphism at codon 129 of PRNP affects the phenotypic expression of Creutzfeldt-Jakob disease linked to E200K mutation. Ann Neurol 2000; 48:269-70. [PMID: 10939584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Tagliavini F, Forloni G, Colombo L, Rossi G, Girola L, Canciani B, Angeretti N, Giampaolo L, Peressini E, Awan T, De Gioia L, Ragg E, Bugiani O, Salmona M. Tetracycline affects abnormal properties of synthetic PrP peptides and PrP(Sc) in vitro. J Mol Biol 2000; 300:1309-22. [PMID: 10903871 DOI: 10.1006/jmbi.2000.3840] [Citation(s) in RCA: 131] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Prion diseases are characterized by the accumulation of altered forms of the prion protein (termed PrP(Sc)) in the brain. Unlike the normal protein, PrP(Sc) isoforms have a high content of beta-sheet secondary structure, are protease-resistant, and form insoluble aggregates and amyloid fibrils. Evidence indicates that they are responsible for neuropathological changes (i.e. nerve cell degeneration and glial cell activation) and transmissibility of the disease process. Here, we show that the antibiotic tetracycline: (i) binds to amyloid fibrils generated by synthetic peptides corresponding to residues 106-126 and 82-146 of human PrP; (ii) hinders assembly of these peptides into amyloid fibrils; (iii) reverts the protease resistance of PrP peptide aggregates and PrP(Sc) extracted from brain tissue of patients with Creutzfeldt-Jakob disease; (iv) prevents neuronal death and astrocyte proliferation induced by PrP peptides in vitro. NMR spectroscopy revealed several through-space interactions between aromatic protons of tetracycline and side-chain protons of Ala(117-119), Val(121-122) and Leu(125) of PrP 106-126. These properties make tetracycline a prototype of compounds with the potential of inactivating the pathogenic forms of PrP.
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Affiliation(s)
- F Tagliavini
- Istituto Nazionale Neurologico Carlo Besta, Via Celoria 11, Milano, 20133, Italy
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10
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Salmona M, Malesani P, De Gioia L, Gorla S, Bruschi M, Molinari A, Della Vedova F, Pedrotti B, Marrari MA, Awan T, Bugiani O, Forloni G, Tagliavini F. Molecular determinants of the physicochemical properties of a critical prion protein region comprising residues 106-126. Biochem J 1999; 342 ( Pt 1):207-14. [PMID: 10432318 PMCID: PMC1220454] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Prion diseases are marked by the cerebral accumulation of conformationally modified forms of the cellular prion protein (PrP(C)), known as PrP(res). The region comprising the residues 106-126 of human PrP seems to have a key role in this conformational conversion, because a synthetic peptide homologous with this sequence (PrP106-126) adopts different secondary structures in different environments. To investigate the molecular determinants of the physicochemical characteristics of PrP106-126, we synthesized a series of analogues including PrP106-126 H(D), PrP106-126 A and PrP106-126 K, with l-His-->d-His, His-->Ala and His-->Lys substitutions respectively at position 111, PrP106-126 NH(2) with amidation of the C-terminus, PrP106-126 V with an Ala-->Val substition at position 117, and PrP106-126 VNH(2) with an Ala-->Val substitution at position 117 and amidation of the C-terminus. The analysis of the secondary structure and aggregation properties of PrP106-126 and its analogues showed the following. (1) His(111) is central to the conformational changes of PrP peptides. (2) Amidation of the C-terminal Gly(126) yields a predominantly random coil structure, abolishes the molecular polymorphism and decreases the propensity of PrP106-126 to generate amyloid fibrils. (3) PrP106-126 V, carrying an Ala-->Val substitution at position 117, does not demonstrate a fibrillogenic ability superior to that of PrP106-126. However, the presence of Val at position 117 increases the aggregation properties of the amidated peptide. (4) Amyloid fibrils are not required for neurotoxicity because the effects of PrP106-126 NH(2) on primary neuronal cultures were similar to those of the wild-type sequence. Conversely, astroglial proliferation is related to the presence of amyloid fibrils, suggesting that astrogliosis in prion encephalopathies without amyloid deposits is a mediated effect rather than a direct effect of disease-specific PrP isoforms.
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Affiliation(s)
- M Salmona
- Istituto di Ricerche Farmacologiche 'Mario Negri', Via Eritrea 62, 20157 Milano, Italy.
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Rosner W, Beers PC, Awan T, Khan MS. Identification of corticosteroid-binding globulin in human milk: measurement with a filter disk assay. J Clin Endocrinol Metab 1976; 42:1064-73. [PMID: 932172 DOI: 10.1210/jcem-42-6-1064] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We have studied the concentration and properties of a protein which binds cortisol in human milk in samples obtained from women during the first 100 days after delivery. A filter disk assay was developed both for the measurement of plasma corticosteroid-binding globulin (CBG) and for the cortisol-binding protein in milk. The concentration of CBG in milk, expressed as its capacity to bind cortisol, is highest on the day of delivery, ca, 0.80 mug/dl, falls over the next 10 days to ca. 0.25 mug/dl, and remains at that level thereafter. If the concentration of CBG is expressed relative to the concentration of serum albumin in milk, it increases from day 1 to day 3 and then remains constant. A detailed comparison of CBG derived from milk and plasma showed that the two proteins co-migrated on Sephadex, sucrose gradient ultracentrifugation, and polyacrylamide gel electrophoresis. The two proteins had the same affinity for cotrisol, progesterone, 17-OH-progesterone, and dexamethasone. Furthermore, the binding activity of CBG in milk was neutralized with anti-CBG antibodies raised against CBG isolated from plasma. Unlike CBG, the concentration of cortisol in milk, 0.8-3.5 mug/dl, showed no systematic variation as a function of the postpartum day on which the sample was obtained.
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