1
|
Zubair HT, Bradley DA, Khairina MD, Oresegun A, Basaif A, Othman J, Rifiat R, Hamidi F, Rahman L, Ezzadeen A, Ibrahim SA, Mansor S, Alkhorayef M, Abdul-Rashid HA. An extendable optical fibre probe survey meter for naturally occurring radioactive material (NORM) and other weak emitters. Sci Rep 2023; 13:11918. [PMID: 37488183 PMCID: PMC10366106 DOI: 10.1038/s41598-023-39180-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 07/20/2023] [Indexed: 07/26/2023] Open
Abstract
We have developed a radioluminescence-based survey meter for use in industries in which there is involvement in naturally occurring radioactive material (NORM), also in support of those needing to detect other weak emitters of radiation. The functionality of the system confronts particular shortcomings of the handheld survey meters that are currently being made use of. The device couples a LYSO:Ce scintillator with a photodetector via a polymer optical fibre waveguide, allowing for "intrinsically safe" inspection within pipework, separators, valves and other such component pieces. The small-diameter optical fibre probe is electrically passive, immune to electromagnetic interference, and chemically inert. The readout circuit is entirely incorporated within a handheld casing housing a silicon photomultiplier (SiPM) detection circuit and a microprocessor circuit connected to an LCD display. A 15 m long flexible PMMA optical fibre waveguide is butt coupled to an ABS plastic probe that retains the LYSO:Ce scintillator. Initial tests have included the use of lab-based mixed gamma-ray sources, measurements being made in concert with a reference conventional GM survey-meter. Characterization, via NORM sources at a decontamination facility, has shown useful sensitivity, covering the dose-rate range 0.10- to 28 µSv h-1 (R-squared 0.966), extending to 80 µSv/h as demonstrated in use of a Cs-137 source. The system is shown to provide an effective tool for detection of radioactivity within hard to access locations, in particular for sources emitting at low radiation levels, down to values that approach background.
Collapse
Affiliation(s)
- H T Zubair
- Fibre Optics Research Centre, Faculty of Engineering, Multimedia University, Jalan Multimedia, 63100, Cyberjaya, Malaysia
- Lumisyns Sdn Bhd, 47600, Subang Jaya, Selangor, Malaysia
| | - D A Bradley
- Centre for Applied Physics and Radiation Technologies, Sunway University, 46150, Petaling Jaya, Malaysia
- School of Mathematics and Physics, University of Surrey, Guildford, GU2 7XH, UK
| | - M D Khairina
- Lumisyns Sdn Bhd, 47600, Subang Jaya, Selangor, Malaysia
| | - Adebiyi Oresegun
- Fibre Optics Research Centre, Faculty of Engineering, Multimedia University, Jalan Multimedia, 63100, Cyberjaya, Malaysia
| | - A Basaif
- Fibre Optics Research Centre, Faculty of Engineering, Multimedia University, Jalan Multimedia, 63100, Cyberjaya, Malaysia
| | - J Othman
- Alypz Sdn Bhd, Jalan Industri USJ 1/1, Taman Perindustrian USJ 1, 47600, Subang Jaya, Selangor, Malaysia
| | - R Rifiat
- Alypz Sdn Bhd, Jalan Industri USJ 1/1, Taman Perindustrian USJ 1, 47600, Subang Jaya, Selangor, Malaysia
| | - F Hamidi
- Alypz Sdn Bhd, Jalan Industri USJ 1/1, Taman Perindustrian USJ 1, 47600, Subang Jaya, Selangor, Malaysia
| | - L Rahman
- Alypz Sdn Bhd, Jalan Industri USJ 1/1, Taman Perindustrian USJ 1, 47600, Subang Jaya, Selangor, Malaysia
| | - A Ezzadeen
- Alypz Sdn Bhd, Jalan Industri USJ 1/1, Taman Perindustrian USJ 1, 47600, Subang Jaya, Selangor, Malaysia
| | - S A Ibrahim
- Fibre Optics Research Centre, Faculty of Engineering, Multimedia University, Jalan Multimedia, 63100, Cyberjaya, Malaysia
| | - S Mansor
- Fibre Optics Research Centre, Faculty of Engineering, Multimedia University, Jalan Multimedia, 63100, Cyberjaya, Malaysia
| | - M Alkhorayef
- Department of Radiological Sciences, College of Applied Medical Sciences, King Saud University, P.O Box 10219, 11433, Riyadh, Saudi Arabia
| | - H A Abdul-Rashid
- Fibre Optics Research Centre, Faculty of Engineering, Multimedia University, Jalan Multimedia, 63100, Cyberjaya, Malaysia.
| |
Collapse
|
2
|
Sroor FM, Elwahy AHM, Abdelhamid IA, Mohamed MF, Elsayed SE, Mahrous KF, Mageed L, Hanafy MK, Ibrahim SA. Synthesis and Anticancer Activities of Novel Bis-chalcones Incorporating
the 1,3-diphenyl-1H-pyrazole Moiety: In Silico and In Vitro Studies. LETT DRUG DES DISCOV 2022. [DOI: 10.2174/1570180819666220301151631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Abstract:
A new series of bis-chalcones 5-10 has been prepared by the condensation reaction of one
equivalent of bis(acetophenones) 3a-f with two equivalents of 1,3-diphenyl-1H-pyrazole-4-carbaldehyde
4. The newly prepared compounds 5-10 have been fully characterized and evaluated as in vitro anticancer
agents against a panel of human cancer cell lines A431, A549, PC3, and a normal human skin
fibroblast BJ1.
Aims:
The current work is designed to explore the anti-cancer activity of novel bis-chalcones incorporating
a 1,3-diphenyl-1H-pyrazole moiety.
Background:
Chalcones represent one of the most important organic compounds that have been attracting
the interest of many researchers in drug discovery.
Objective:
The present study was carried out to explore anti-cancer activity of novel bis-chalcones incorporating
a 1,3-diphenyl-1H-pyrazole moiety as in vitro and in silico studies.
Materials and Methods:
We used the condensation reaction to prepare bis-chalcones incorporating 1,3-
diphenyl-1H-pyrazole moiety. The MTT Assay, Anti-cancer activity, Gene expression, DNA Fragmentation,
DNA Damage, and Molecular docking were investigated.
Results:
Compounds 5 and 9 were found to be the most promising compounds in the prepared series with
IC50 (50.3 and 50.1 μg/ml, respectively) against epidermoid cancer cell line A431 compared to doxorubicin
as a reference drug.
Conclusion:
All of these results showed that chalcones 5 and 9 have promising anti-cancer properties
without cytotoxic effect, which could make them a promising active component for further studies.
Collapse
Affiliation(s)
- Farid M. Sroor
- Department of Organometallic and Organometalloid
Chemistry, National Research Centre, Cairo 12622, Egypt
| | - Ahmed H. M. Elwahy
- Department of Chemistry, Faculty of Science, Cairo University, Giza
12613, Egypt
| | - Ismail A. Abdelhamid
- Department of Chemistry, Faculty of Science, Cairo University, Giza
12613, Egypt
| | - Magda F. Mohamed
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt
| | | | - Karima F. Mahrous
- Department of Cell Biology, National Research
Centre, 12622-Dokki, Egypt
| | - Lamiaa Mageed
- Department of Biochemistry, National Research Centre, Dokki 12622, Egypt
| | | | - Sherif A. Ibrahim
- Department of Zoology, Faculty of Science, Cairo University, Giza 12613, Egypt
| |
Collapse
|
3
|
Ibrahim SA, Adnan AA, Gahzi ST. Serum Level of Inhibin B and Kisspeptin, as well as Their Correlation with Biochemical Factors in Obese Adult Patients. Arch Razi Inst 2022; 77:703-707. [PMID: 36284976 PMCID: PMC9548286 DOI: 10.22092/ari.2022.356954.1945] [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: 12/05/2021] [Accepted: 01/16/2022] [Indexed: 05/24/2023]
Abstract
Obesity is one of the most important global health problems causing serious health risks and early death in human. It is also associated with disturbance of homeostasis of hormones and immunological biochemical factors inside the human body. This study aimed to evaluate the serum level of inhibin B and kisspeptin among Iraqi obese adult people and other biochemical parameters correlated with obesity. Inhibin B and levels of kisspeptin were evaluated in the samples of serum from 40 Iraqi obese adult patients and 30 healthy non-obese individuals. A significant decrease (P<0.0001) was observed in the kisspeptin level in both males and females, compared to the control group. Moreover, inhibin B decreased significantly in obese females only (P<0.001), while there was no differences between males and the control group in this regard. Finally, body mass index, serum glutamic pyruvic transaminase (SGPT), and leptin showed negative correlation with kisspeptin (0.01, 0.5, and 0.01), respectively. However, a positive association was observed with the level of Ca in the serum. On the other hand, inhibin B confirmed a positive correlation with SGPT. The present study revealed a significant increase in inhibin B and kisspeptin, with SGPT and Ca in the serum of obese patients, which could lead to complications and health problems among these patients.
Collapse
Affiliation(s)
- S A Ibrahim
- Basic Science Department, College of Nursing, University of Baghdad, Baghdad, Iraq
| | - A A Adnan
- Basic Science Department, College of Nursing, University of Baghdad, Baghdad, Iraq
| | - S T Gahzi
- Basic Science Department, College of Nursing, University of Baghdad, Baghdad, Iraq
| |
Collapse
|
4
|
Sroor FM, Mohamed MF, Abdullah GK, Mahrous KF, Zoheir KMA, Ibrahim SA, Elwahy AHM, Abdelhamid IA. Anticancer Activity of New Bis-(3-(Thiophen-2-yl)-1 H-Pyrazol-4-yl)Chalcones: Synthesis, in-Silico, and in-Vitro Studies. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2046616] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Farid M. Sroor
- Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt
| | - Magda F. Mohamed
- Department of Chemistry (Biochemistry Branch), Faculty of Science, Cairo University, Giza, Egypt
| | - Ghada Khaled Abdullah
- Department of Chemistry (Biochemistry Branch), Faculty of Science, Cairo University, Giza, Egypt
| | | | | | - Sherif A. Ibrahim
- Zoology Department, Faculty of Science, Cairo University, Giza, Egypt
| | | | | |
Collapse
|
5
|
Reynolds KA, Schlessinger DI, Yanes AF, Godinez-Puig V, Chen BR, Kurta AO, Cotseones JK, Chiren SG, Iyengar S, Ibrahim SA, Kang BY, Worley B, Behshad R, DeHoratius DM, Denes P, Drucker AM, Dzubow LM, Etzkorn JR, Harwood CA, Kim JYS, Lawrence N, Lee EH, Lissner GS, Marghoob AA, Guminiski A, Matin RN, Mattox AR, Mittal BB, Thomas JR, Zhou XA, Zloty D, Hughes BGM, Nottage MK, Green AC, Testori AAE, Argenziano G, Longo C, Zalaudek I, Lebbe C, Malvehy J, Saiag P, Cernea SS, Schmitt J, Kirkham JJ, Poon E, Sobanko JF, Cartee TV, Maher IA, Alam M. Development of a core outcome set for cutaneous squamous cell carcinoma trials: identification of core domains and outcomes. Br J Dermatol 2021; 184:1113-1122. [PMID: 33236347 DOI: 10.1111/bjd.19693] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2020] [Indexed: 01/16/2023]
Abstract
BACKGROUND The lack of uniformity in the outcomes reported in clinical studies of the treatment of cutaneous squamous cell carcinoma (cSCC) complicates efforts to compare treatment effectiveness across trials. OBJECTIVES To develop a core outcome set (COS), a minimum set of agreed-upon outcomes to be measured in all clinical trials of a given disease or outcome, for the treatment of cSCC. METHODS One hundred and nine outcomes were identified via a systematic literature review and interviews with 28 stakeholders. After consolidation of this long list, 55 candidate outcomes were rated by 19 physician and 10 patient stakeholders, in two rounds of Delphi exercises. Outcomes scored 'critically important' (score of 7, 8 or 9) by ≥ 70% of patients and ≥ 70% of physicians were provisionally included. At the consensus meeting, after discussion and voting of 44 international experts and patients, the provisional list was reduced to a final core set, for which consensus was achieved among all meeting participants. RESULTS A core set of seven outcomes was finalized at the consensus meeting: (i) serious or persistent adverse events, (ii) patient-reported quality of life, (iii) complete response, (iv) partial response, (v) recurrence-free survival, (vi) progression-free survival and (vii) disease-specific survival. CONCLUSIONS In order to increase the comparability of results across trials and to reduce selective reporting bias, cSCC researchers should consider reporting these core outcomes. Further work needs to be performed to identify the measures that should be reported for each of these outcomes.
Collapse
Affiliation(s)
- K A Reynolds
- Department of Dermatology, Northwestern University, Chicago, IL, USA.,University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - D I Schlessinger
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - A F Yanes
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - V Godinez-Puig
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - B R Chen
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - A O Kurta
- Department of Dermatology, Saint Louis University, St Louis, MO, USA
| | - J K Cotseones
- Medical & Cosmetic Dermatology Service, Northwestern Medicine Regional Medical Group, Naperville, IL, USA
| | - S G Chiren
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - S Iyengar
- Department of Dermatology, West Virginia University, Morgantown, WV, USA
| | - S A Ibrahim
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - B Y Kang
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - B Worley
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - R Behshad
- Department of Dermatology, Saint Louis University, St Louis, MO, USA
| | - D M DeHoratius
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - P Denes
- Division of Cardiology, Northwestern University, Chicago, IL, USA
| | - A M Drucker
- Division of Dermatology, Department of Medicine, University of Toronto, Toronto, ON, Canada.,Division of Dermatology, Department of Medicine and Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada
| | | | - J R Etzkorn
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - C A Harwood
- Department of Dermatology, Royal London Hospital, Barts Health NHS Trust, London, UK.,Centre for Cell Biology and Cutaneous Research, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - J Y S Kim
- Division of Plastic and Reconstructive Surgery, Northwestern University, Chicago, IL, USA
| | - N Lawrence
- Division of Dermatologic Surgery, Cooper University Hospital, Camden, NJ, USA
| | - E H Lee
- Dermatology Service, Memorial Sloan Kettering Cancer Center, New York City, NY, USA
| | - G S Lissner
- Department of Ophthalmology, Northwestern University, Chicago, IL, USA
| | - A A Marghoob
- Department of Dermatology, Memorial Sloan Kettering Cancer Center, New York City, NY, USA
| | - A Guminiski
- Department of Medical Oncology, Royal North Shore and Mater Hospitals, Sydney, Australia
| | - R N Matin
- Department of Dermatology, Churchill Hospital, Oxford, UK
| | - A R Mattox
- Department of Dermatology, University of Minnesota, Minneapolis, MN, USA
| | - B B Mittal
- Department of Radiation Oncology, Northwestern University, Chicago, IL, USA
| | - J R Thomas
- Department of Otolaryngology-Head and Neck Surgery, Northwestern University, Chicago, IL, USA
| | - X A Zhou
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - D Zloty
- Department of Dermatology & Skin Science, University of British Columbia, Vancouver, BC, Canada
| | - B G M Hughes
- Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia.,Department of Medical Oncology, The Prince Charles Hospital, Brisbane, QLD, Australia.,Cancer Care Services, Royal Brisbane and Women's Hospital, Herston, QLD, Australia
| | - M K Nottage
- Cancer Care Services, Royal Brisbane and Women's Hospital, Herston, QLD, Australia
| | - A C Green
- Department of Population Health, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia.,CRUK Manchester Institute and University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - A A E Testori
- Division of Dermatology, Fondazione IRCCS, Policlinico san Matteo, Pavia, Italy
| | - G Argenziano
- Dermatology Unit, University of Campania, Naples, Italy
| | - C Longo
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy.,Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Centro Oncologico ad Alta Tecnologia Diagnostica-Dermatologia, Reggio Emilia, Italy
| | - I Zalaudek
- Department of Dermatology, Medical University of Trieste, Trieste, Italy
| | - C Lebbe
- APHP Department of Dermatology, Saint-Louis Hospital, INSERM U976, Université de Paris, Paris, France
| | - J Malvehy
- Department of Dermatology, Hospital Clinic of Barcelona, IDIBAPS and CIBER de Enfermedades Raras, Barcelona, Spain
| | - P Saiag
- University Department of Dermatology, Université de Versailles-Saint Quentin en Yvelines, APHP, Boulogne, France
| | - S S Cernea
- Dermatology Department of Hospital do Servidor Público Municipal de São Paulo, São Paulo, SP, Brazil
| | - J Schmitt
- Center for Evidence-Based Healthcare, Medical Faculty, Carl Gustav Carus, TU Dresden, Dresden, Germany
| | - J J Kirkham
- Centre for Biostatistics, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - E Poon
- Department of Dermatology, Northwestern University, Chicago, IL, USA
| | - J F Sobanko
- Department of Dermatology, Perelman Center for Advanced Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, USA.,Division of Dermatologic Surgery, Department of Dermatology, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - T V Cartee
- Department of Dermatology, Penn State College of Medicine, Hershey, PA, USA
| | - I A Maher
- Department of Dermatology, University of Minnesota, Minneapolis, MN, USA
| | - M Alam
- Department of Dermatology, Northwestern University, Chicago, IL, USA.,Department of Otolaryngology-Head and Neck Surgery, Northwestern University, Chicago, IL, USA.,Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| |
Collapse
|
6
|
Hafez EN, Awadallah FM, Ibrahim SA, Amin MM, El-Nawasera NZ. Assessment of vaccination with gamma radiationattenuated infective Toxocara canis eggs on murine toxocariasis. Trop Biomed 2020; 37:89-102. [PMID: 33612721] [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: 06/12/2023]
Abstract
Toxocara canis is a major parasite that infects many animals with high risk of human infections. This study aims at assessing the immunization with gamma radiationattenuated infective stage on rats challenged with non-irradiated dose. Level of vaccine protection was evaluated in liver and lung regarding parasitological, histopathological, biochemical and molecular parameters. Fifty rats were enrolled in three groups: group A (10 rats) as normal control; group B (20 rats) subdivided into subgroup B1 (infected control) and subgroup B2 infected then challenged after 14 days with the same dose of infection (challenged infected control); and group C (20 rats) subdivided into subgroup C1 vaccinated with a dose of 800 gray (Gy) gamma-radiated infective eggs (vaccine control) and subgroup C2 vaccinated then challenged on 14th day with same number of infective eggs (vaccinated-challenged). Tissues were stained with Haematoxylin and Eosin (H and E) for histopathological studies. Biochemical studies through detection of nitric oxide (NO) and Caspase-3 were conducted. Extent of DNA damage by Comet assay was assessed. Vaccinated-challenged subgroup revealed a marked reduction in larvae in tissues with mild associated histological changes. In addition there was accompanied reduction of NO, Casepase-3 level and DNA damage compared to the control infected group. It could be concluded that vaccination of rats with a dose of 800Gy gamma radiation-attenuated infective stage improves immune response to challenge infection and drastically reduces the morbidity currently seen.
Collapse
Affiliation(s)
- E N Hafez
- National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - F M Awadallah
- Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| | - S A Ibrahim
- Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| | - M M Amin
- National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - N Z El-Nawasera
- Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
| |
Collapse
|
7
|
Kanada M, Kim BD, Hardy JW, Ronald JA, Bachmann MH, Bernard MP, Perez GI, Zarea AA, Ge TJ, Withrow A, Ibrahim SA, Toomajian V, Gambhir SS, Paulmurugan R, Contag CH. Microvesicle-Mediated Delivery of Minicircle DNA Results in Effective Gene-Directed Enzyme Prodrug Cancer Therapy. Mol Cancer Ther 2019; 18:2331-2342. [PMID: 31451563 DOI: 10.1158/1535-7163.mct-19-0299] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/13/2019] [Accepted: 08/14/2019] [Indexed: 12/14/2022]
Abstract
An emerging approach for cancer treatment employs the use of extracellular vesicles, specifically exosomes and microvesicles, as delivery vehicles. We previously demonstrated that microvesicles can functionally deliver plasmid DNA to cells and showed that plasmid size and sequence, in part, determine the delivery efficiency. In this study, delivery vehicles comprised of microvesicles loaded with engineered minicircle (MC) DNA that encodes prodrug converting enzymes developed as a cancer therapy in mammary carcinoma models. We demonstrated that MCs can be loaded into shed microvesicles with greater efficiency than their parental plasmid counterparts and that microvesicle-mediated MC delivery led to significantly higher and more prolonged transgene expression in recipient cells than microvesicles loaded with the parental plasmid. Microvesicles loaded with MCs encoding a thymidine kinase (TK)/nitroreductase (NTR) fusion protein produced prolonged TK-NTR expression in mammary carcinoma cells. In vivo delivery of TK-NTR and administration of prodrugs led to the effective killing of both targeted cells and surrounding tumor cells via TK-NTR-mediated conversion of codelivered prodrugs into active cytotoxic agents. In vivo evaluation of the bystander effect in mouse models demonstrated that for effective therapy, at least 1% of tumor cells need to be delivered with TK-NTR-encoding MCs. These results suggest that MC delivery via microvesicles can mediate gene transfer to an extent that enables effective prodrug conversion and tumor cell death such that it comprises a promising approach to cancer therapy.
Collapse
Affiliation(s)
- Masamitsu Kanada
- Department of Pediatrics, Stanford University, Stanford, California. .,Department of Molecular Imaging Program at Stanford (MIPS), Stanford University, Stanford, California.,Department of Pharmacology & Toxicology, Michigan State University, East Lansing, Michigan.,Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan
| | - Bryan D Kim
- Deptartment of Chemistry, University of California, Santa Cruz, California
| | - Jonathan W Hardy
- Department of Pediatrics, Stanford University, Stanford, California.,Department of Molecular Imaging Program at Stanford (MIPS), Stanford University, Stanford, California.,Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan.,Department of Microbiology & Molecular Genetics, Michigan State University, East Lansing, Michigan
| | - John A Ronald
- Department of Molecular Imaging Program at Stanford (MIPS), Stanford University, Stanford, California.,Department of Radiology, Stanford University, Stanford, California.,Robarts Research Institute, Western University, London, Ontario, Canada.,Lawson Health Research Institute, London, Ontario, Canada
| | - Michael H Bachmann
- Department of Pediatrics, Stanford University, Stanford, California.,Department of Molecular Imaging Program at Stanford (MIPS), Stanford University, Stanford, California.,Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan.,Department of Microbiology & Molecular Genetics, Michigan State University, East Lansing, Michigan
| | - Matthew P Bernard
- Department of Pharmacology & Toxicology, Michigan State University, East Lansing, Michigan.,Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan
| | - Gloria I Perez
- Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan
| | - Ahmed A Zarea
- Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan
| | - T Jessie Ge
- Department of Radiology, Stanford University, Stanford, California
| | - Alicia Withrow
- Center for Advanced Microscopy, Michigan State University, East Lansing, Michigan
| | - Sherif A Ibrahim
- Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan.,Deptartment of Histology and Cell Biology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Victoria Toomajian
- Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan.,Department of Biomedical Engineering, Michigan State University, East Lansing, Michigan
| | - Sanjiv S Gambhir
- Department of Molecular Imaging Program at Stanford (MIPS), Stanford University, Stanford, California.,Department of Radiology, Stanford University, Stanford, California.,Department of Bioengineering, Stanford University, Stanford, California.,Department of Materials Science, Stanford University, Stanford, California
| | - Ramasamy Paulmurugan
- Department of Molecular Imaging Program at Stanford (MIPS), Stanford University, Stanford, California. .,Department of Radiology, Stanford University, Stanford, California
| | - Christopher H Contag
- Department of Pediatrics, Stanford University, Stanford, California. .,Department of Molecular Imaging Program at Stanford (MIPS), Stanford University, Stanford, California.,Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan.,Department of Microbiology & Molecular Genetics, Michigan State University, East Lansing, Michigan.,Department of Biomedical Engineering, Michigan State University, East Lansing, Michigan
| |
Collapse
|
8
|
Mohamed HT, Gadalla R, El-Husseiny N, Hassan H, Wang Z, Ibrahim SA, El-Shinawi M, Sherr DH, Mohamed MM. Inflammatory breast cancer: Activation of the aryl hydrocarbon receptor and its target CYP1B1 correlates closely with Wnt5a/b-β-catenin signalling, the stem cell phenotype and disease progression. J Adv Res 2018; 16:75-86. [PMID: 30899591 PMCID: PMC6413307 DOI: 10.1016/j.jare.2018.11.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/30/2018] [Accepted: 11/30/2018] [Indexed: 12/30/2022] Open
Abstract
AHR is over-expressed and hyperactivated in carcinoma tissues of IBC patients. AHR knockdown inhibits expression of CYP1B1 and Wnt5a in IBC cells. AHR and CYP1B1 expression correlates with Wnt5 a/b and b-catenin expression levels. AHR and CYP1B1 expression correlates with percentage of CD44(+)/CD24(−/low) subset in IBC. AHR and its surrogate molecules correlate with IBC poor prognosis.
The aim of the present study was to evaluate the expression levels of the aryl hydrocarbon receptor (AHR) and its target gene CYP1B1 and to correlate their expression with Wnt5a/b-β-catenin, the CD44+/CD24(−/low) cancer stem cell (CSC) subset and factors associated with poor prognosis in inflammatory breast cancer (IBC) and non-IBC patients. The methods of analysis used were quantitative real-time PCR, western blotting, immunohistochemistry and flow cytometry. Compared to non-IBC tissues, IBC tissues exhibited the overexpression of AHR and its target gene/protein CYP1B1. AHR and CYP1B1 mRNA levels were associated with the poor clinical prognosis markers tumour grade, lymphovascular invasion, cell proliferation and lymph node metastasis. Furthermore, AHR expression correlated with the expression of Wnt5a/b and β-catenin signalling molecules, and Wnt5a mRNA expression was downregulated in the SUM149 human IBC cell line and the MDA-MB-231 non-IBC cell line upon inhibition of AHR. AHR gene knockout (CRISPR-Cas9) inhibits CYP1B1 and Wnt5a expression in the IBC cell line. The CD44+/CD24(−/low) subset was significantly correlated with the expression of AHR, CYP1B1, Wnt5a/b and β-catenin in IBC tissues. The overexpression of AHR and its target CYP1B1 correlated with the expression of Wnt5a/b and β-catenin, CSCs, and poor clinical prognostic factors of IBC. Thus, targeting AHR and/or its downstream target molecules CYP1B1 and Wnt5a/b may represent a therapeutic approach for IBC.
Collapse
Affiliation(s)
- Hossam T Mohamed
- Department of Zoology, Faculty of Science, Cairo University, Cairo University, Giza 12613, Egypt
| | - Ramy Gadalla
- Department of Zoology, Faculty of Science, Cairo University, Cairo University, Giza 12613, Egypt
| | - Noura El-Husseiny
- Department of Zoology, Faculty of Science, Cairo University, Cairo University, Giza 12613, Egypt
| | - Hebatallah Hassan
- Department of Zoology, Faculty of Science, Cairo University, Cairo University, Giza 12613, Egypt
| | - Zhongyan Wang
- Department of Environmental Health, Boston University School of Public Health, Boston, MA 02118, USA
| | - Sherif A Ibrahim
- Department of Zoology, Faculty of Science, Cairo University, Cairo University, Giza 12613, Egypt
| | - Mohamed El-Shinawi
- Department of General Surgery, Faculty of Medicine, Ain Shams University, Cairo 11566, Egypt
| | - David H Sherr
- Department of Environmental Health, Boston University School of Public Health, Boston, MA 02118, USA
| | - Mona M Mohamed
- Department of Zoology, Faculty of Science, Cairo University, Cairo University, Giza 12613, Egypt
| |
Collapse
|
9
|
Kermanshahi H, Heravi RM, Attar A, Pour ARA, Bayat E, Zadeh MH, Daneshmand A, Ibrahim SA. Effects of Acidified Yeast and Whey Powder on Performance, Organ Weights, Intestinal Microflora, and Gut Morphology of Male Broilers. Rev Bras Cienc Avic 2017. [DOI: 10.1590/1806-9061-2016-0351] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
| | - RM Heravi
- Ferdowsi University of Mashhad, Iran
| | - A Attar
- Ferdowsi University of Mashhad, Iran
| | | | | | | | | | - SA Ibrahim
- North Carolina A&T State University, USA
| |
Collapse
|
10
|
Abu Hafsa SH, Ibrahim SA. Effect of dietary polyphenol-rich grape seed on growth performance, antioxidant capacity and ileal microflora in broiler chicks. J Anim Physiol Anim Nutr (Berl) 2017; 102:268-275. [PMID: 28295656 DOI: 10.1111/jpn.12688] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [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: 09/11/2016] [Accepted: 01/02/2017] [Indexed: 11/27/2022]
Abstract
In this study, we examined the effect of dietary supplementation with grape seed (GS) on the performance, carcass traits, plasma biochemistry, antioxidant status and ileal microflora in broilers. Experiment diets included a control diet (without additive) and three levels of GS powder (10, 20 and 40 g/kg of diet). Each diet was fed to a total of 300 one-day-old Cobb-500 chicks for 42 days. The addition of 20 g/kg of GS to the basal diet increased final body weight and body weight gain, improved the feed conversion ratio and did not affect feed intake. Dietary 20 g GS significantly increased (p < .05) the percentage of carcass yield %, dressing % and gizzard. However, the addition of 40 g/kg of GS significantly reduced the percentage of abdominal fat in the birds. Diets supplemented with GS showed the lowest content of ether extract compared with the control group (p < .05). The physical characteristics of meat and the chemical composition of DM, CP and ash were not significantly influenced by treatments. In the GS groups, plasma protein, albumin, globulin, aspartate aminotransferase and alanine aminotransferase concentrations showed no significant change compared with the control group. Broilers fed a diet supplemented with GS had lower levels of plasma glucose, total lipids, triglycerides and cholesterol compared with the control birds (p < .05). The addition of 40 g of GS significantly (p < .05) enhanced the activity of reduced glutathione, catalase, superoxide dismutase, glutathione peroxidase and GST, and correlated with significantly decreased thiobarbituric acid-reactive substances levels compared with the control group. The value of ileal pH was not significantly affected by the GS levels. Broilers fed diets supplemented with GS had lower ileal Streptococcus spp. and Escherichia coli populations but higher Lactobacillus spp. populations (p < .05). No adverse effects on birds' health were detected due to the use of GS. Thus, GS could be recommended as an herbal supplement in the diet of broiler chickens to improve performance, reduce blood lipids, enhance antioxidant capacity and decrease detrimental bacteria in the ileum.
Collapse
Affiliation(s)
- S H Abu Hafsa
- Department of Livestock Research, Arid Lands Cultivation Research Institute, City of Scientific Research and Technology Applications, New Borg El-Arab, Alexandria, Egypt
| | - S A Ibrahim
- Food Microbiology and Biotechnology Laboratory, North Carolina Agricultural and Technical State University, Greensboro, NC, USA
| |
Collapse
|
11
|
El-Ghonaimy EA, Ibrahim SA, Youns A, Hussein Z, Nouh MA, El-Mamlouk T, El-Shinawi M, Mohamed MM. Erratum to: Secretome of tumor-associated leukocytes augment epithelial-mesenchymal transition in positive lymph node breast cancer patients via activation of EGFR/Tyr845 and NF-kB/p65 signaling pathway. Tumour Biol 2016; 37:14333. [PMID: 27473080 DOI: 10.1007/s13277-016-5137-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- Eslam A El-Ghonaimy
- Department of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Sherif A Ibrahim
- Department of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Amal Youns
- Department of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Zeinab Hussein
- Department of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Mohamed Akram Nouh
- Department of Pathology, National Cancer Institute, Cairo University, Giza, 12613, Egypt
| | - Tahani El-Mamlouk
- Department of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Mohamed El-Shinawi
- Department of General Surgery, Faculty of Medicine, Ain Shams University, Cairo, 11566, Egypt
| | - Mona Mostafa Mohamed
- Department of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt.
| |
Collapse
|
12
|
Kermanshahi H, Ghofrani Tabari D, Khodambashi Emami N, Daneshmand A, Ibrahim SA. Effect of in ovo injection of threonine on immunoglobulin A gene expression in the intestine of Japanese quail at hatch. J Anim Physiol Anim Nutr (Berl) 2016; 101:10-14. [PMID: 27445232 DOI: 10.1111/jpn.12543] [Citation(s) in RCA: 8] [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: 02/08/2016] [Accepted: 04/25/2016] [Indexed: 11/27/2022]
Abstract
The objective of this study was to investigate the effect of in ovo injection of threonine (THR) on immunoglobulin A (IgA) gene expression of Japanese quail on hatch day. A total of 540 Japanese quail eggs were assigned into nine groups of 60 each and were set in a single-stage incubator. Treatments were as follows: non-injected (control), two diluent levels (0.05 or 0.1 ml saline), two sites of injection (in or under the air sac) and with or without nutrients (0.5 mg/ml THR). Eggs were injected on d 11 of incubation. On hatch day, after euthanizing hatched quail chicks, the intestine was removed and the jejunum was separated. The relative mRNA expression of jejunal IgA increased (p < 0.05) by the injection of 0.05 ml THR under the air sac when compared to the control group or other treatments of injection. Compared to the control group, no differences were imputable to treatments of 0.1-ml injections on IgA gene expression. Differences with other injected groups were not significant. It was concluded that injection of 0.05 ml saline containing 0.5 mg THR/ml under the air sac can improve jejunal IgA mRNA expression in newly hatched Japanese quail chicks.
Collapse
Affiliation(s)
- H Kermanshahi
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - D Ghofrani Tabari
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - N Khodambashi Emami
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - A Daneshmand
- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
| | - S A Ibrahim
- Department of Family and Consumer Sciences, North Carolina A&T State University, Greensboro, NC, USA
| |
Collapse
|
13
|
Ibrahim SA, El-Ghonaimy EA, Hassan H, Mahana N, Mahmoud MA, El-Mamlouk T, El-Shinawi M, Mohamed MM. Hormonal-receptor positive breast cancer: IL-6 augments invasion and lymph node metastasis via stimulating cathepsin B expression. J Adv Res 2016; 7:661-70. [PMID: 27482469 PMCID: PMC4957008 DOI: 10.1016/j.jare.2016.06.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [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: 03/12/2016] [Revised: 06/18/2016] [Accepted: 06/24/2016] [Indexed: 01/17/2023] Open
Abstract
Hormonal-receptor positive (HRP) breast cancer patients with positive metastatic axillary lymph nodes are characterized by poor prognosis and increased mortality rate. The mechanisms by which cancer cells invade lymph nodes have not yet been fully explored. Several studies have shown that expression of IL-6 and the proteolytic enzyme cathepsin B (CTSB) was associated with breast cancer poor prognosis. In the present study, the effect of different concentrations of recombinant human IL-6 on the invasiveness capacity of HRP breast cancer cell line MCF-7 was tested using an in vitro invasion chamber assay. The impact of IL-6 on expression and activity of CTSB was also investigated. IL-6 treatment promoted the invasiveness potential of MCF-7 cells in a dose-dependent manner. Furthermore, MCF-7 cells displayed elevated CTSB expression and activity associated with loss of E-cadherin and upregulation of vimentin protein levels upon IL-6 stimulation. To validate these results in vivo, the level of expression of IL-6 and CTSB in the carcinoma tissues of HRP-breast cancer patients with positive and negative axillary metastatic lymph nodes (pLNs and nLNs) was assessed. Western blot and immunohistochemical staining data showed that expression of IL-6 and CTSB was higher in carcinoma tissues in HRP-breast cancer with pLNs than those with nLNs patients. ELISA results showed carcinoma tissues of HRP-breast cancer with pLNs exhibited significantly elevated IL-6 protein levels by approximately 2.8-fold compared with those with nLNs patients (P < 0.05). Interestingly, a significantly positive correlation between IL-6 and CTSB expression was detected in clinical samples of HRP-breast cancer patients with pLNs (r = 0.78, P < 0.01). Collectively, this study suggests that IL-6-induced CTSB may play a role in lymph node metastasis, and that may possess future therapeutic implications for HRP-breast cancer patients with pLNs. Further studies are necessary to fully identify IL-6/CTSB axis in different molecular subtypes of breast cancer.
Collapse
Affiliation(s)
- Sherif A Ibrahim
- Department of Zoology, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Eslam A El-Ghonaimy
- Department of Zoology, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Hebatallah Hassan
- Department of Zoology, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Noha Mahana
- Department of Zoology, Faculty of Science, Cairo University, Giza 12613, Egypt
| | | | - Tahani El-Mamlouk
- Department of Zoology, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Mohamed El-Shinawi
- Department of General Surgery, Faculty of Medicine, Ain Shams University, Cairo 11566, Egypt
| | - Mona M Mohamed
- Department of Zoology, Faculty of Science, Cairo University, Giza 12613, Egypt
| |
Collapse
|
14
|
Ibrahim SA, Elghonaimy EA, El-Shinawi M, El-Halawany M, Nouh MA, El-Mamlouk T, Sloane BF, Mohamed MM. Abstract 430: MCP-1/CCL2 and IL-8 regulate proteolytic activity of triple negative inflammatory breast cancer via cathepsin B, ERK1/2, JAK1 and Src signaling pathways. Cancer Res 2015. [DOI: 10.1158/1538-7445.am2015-430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
Inflammatory breast cancer (IBC) is the most aggressive form of breast cancer. Recently, we have shown that macrophages isolated from the tumor microenvironment of IBC patients secrete monocyte chemoattractant protein-1/CC-chemokine ligand 2 (MCP-1/CCL2) and IL-8 that augment dissemination and metastasis of IB carcinoma cells. However, the precise molecular mechanism by which these cytokines exert their effect is still unclear.
Methods
In the present study, the triple negative breast cancer (TNBC) cell lines Sum149 (IBC) and HCC70 (non-IBC) cells were employed to analyze the effect of IL-8 and MCP-1/CCL2 on the proteolytic activity using live cell imaging assay, expression of cathepsin B and the activation status of STAT3, AKT, JAK1 and Src. In addition, we enrolled TNBC patients sub-grouped into IBC (n = 15), non-IBC (n = 19) patients.
Results
Our results revealed that upon stimulation with MCP-1/CCL2 and IL-8, Sum149 cells and HCC70 exhibited an increase in DQ-collagen degradation-mediated proteolytic activity. Mechanistically, MCP-1/CCL2 and IL-8 increase collagen degradation via enhanced expression of cathepsin B single chain mature enzyme (31 kDa) and the heavy chain of double chain mature enzyme (25/26 kDa). Moreover, MCP-1/CCL2 and IL-8 enhance activation of STAT3, ERK1/2 and AKT in both Sum149 and HCC70 cells. Interestingly, we detected over-expression of cathepsin B in the carcinoma tissues of TNBC-IBC patients compared to non-IBC patients. Over expression of cathepsin B found to be associated with activation of Src and ERK1/2, in IBC as compared to non-IBC tissues.
Conclusions
Our data indicate that MCP-1/CCL2 and IL-8 stimulate proteolytic activity, cathepsin B expression and Src-ERK1/2 pathway in IBC tissues versus non-IBC. Targeting MCP-1/CCL2 and IL-8 in triple negative IBC patients represents a promising therapeutic strategy.
Citation Format: Sherif A. Ibrahim, Eslam A. Elghonaimy, Mohamed El-Shinawi, Medhat El-Halawany, Mohamed A. Nouh, Tahani El-Mamlouk, Bonnie F. Sloane, Mona Mostafa Mohamed. MCP-1/CCL2 and IL-8 regulate proteolytic activity of triple negative inflammatory breast cancer via cathepsin B, ERK1/2, JAK1 and Src signaling pathways. [abstract]. In: Proceedings of the 106th Annual Meeting of the American Association for Cancer Research; 2015 Apr 18-22; Philadelphia, PA. Philadelphia (PA): AACR; Cancer Res 2015;75(15 Suppl):Abstract nr 430. doi:10.1158/1538-7445.AM2015-430
Collapse
|
15
|
Ibrahim SA, Rahman NA, Abu Bakar MH, Girei SH, Yaacob MH, Ahmad H, Mahdi MA. Room temperature ammonia sensing using tapered multimode fiber coated with polyaniline nanofibers. Opt Express 2015; 23:2837-2845. [PMID: 25836144 DOI: 10.1364/oe.23.002837] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrate an ammonia sensor composed of a tapered multimode fiber coated with polyaniline nanofibers that operates at room temperature (26°C). The optical properties of the polyaniline layer changes when it is exposed to ammonia, leading to a change in the absorption of evanescent field. The fiber sensor was tested by exposing it to ammonia at different concentrations and the absorbance is measured using a spectrophotometer system. Measured response and recovery times are about 2.27 minutes and 9.73 minutes, respectively. The sensor sensitivity can be controlled by adjusting the tapered fiber diameter and the highest sensitivity is achieved when the diameter is reduced to 20 µm.
Collapse
|
16
|
El-Ghonaimy EA, El-Shinawi M, Ibrahim SA, El-Ghazaly H, Abd-El-Tawab R, Nouh MA, El-Mamlouk T, Mohamed MM. Positive lymph-node breast cancer patients - activation of NF-κB in tumor-associated leukocytes stimulates cytokine secretion that promotes metastasis via C-C chemokine receptor CCR7. FEBS J 2014; 282:271-82. [DOI: 10.1111/febs.13124] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Revised: 08/23/2014] [Accepted: 10/17/2014] [Indexed: 12/20/2022]
Affiliation(s)
| | | | | | | | | | - Mohamed A. Nouh
- Department of Pathology; National Cancer institute; Cairo University; Giza Egypt
| | | | | |
Collapse
|
17
|
Ibrahim SA, Hassan H, Götte M. MicroRNA regulation of proteoglycan function in cancer. FEBS J 2014; 281:5009-22. [DOI: 10.1111/febs.13026] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 08/08/2014] [Accepted: 08/26/2014] [Indexed: 01/08/2023]
Affiliation(s)
- Sherif A. Ibrahim
- Department of Zoology; Faculty of Science; Cairo University; Giza Egypt
| | - Hebatallah Hassan
- Department of Zoology; Faculty of Science; Cairo University; Giza Egypt
| | - Martin Götte
- Department of Gynecology and Obstetrics; Münster University Hospital; Germany
| |
Collapse
|
18
|
Hashim S, Ibrahim SA, Che Omar SS, Alajerami YSM, Saripan MI, Noor NM, Ung NM, Mahdiraji GA, Bradley DA, Alzimami K. Photon irradiation response of photonic crystal fibres and flat fibres at radiation therapy doses. Appl Radiat Isot 2014; 90:258-60. [PMID: 24858954 DOI: 10.1016/j.apradiso.2014.04.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 11/07/2013] [Revised: 04/14/2014] [Accepted: 04/17/2014] [Indexed: 11/18/2022]
Abstract
Radiation effects of photon irradiation in pure Photonic Crystal Fibres (PCF) and Flat fibres (FF) are still much less investigated in thermoluminescense dosimetry (TLD). We have reported the TL response of PCF and FF subjected to 6 MV photon irradiation. The proposed dosimeter shows good linearity at doses ranging from 1 to 4 Gy. The small size of these detectors points to its use as a dosimeter at megavoltage energies, where better tissue-equivalence and the Bragg-Gray cavity theory prevails.
Collapse
Affiliation(s)
- S Hashim
- Department of Physics, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia; Oncology Treatment Centre, Sultan Ismail Hospital, 81100 Johor Bahru, Malaysia.
| | - S A Ibrahim
- Department of Physics, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
| | - S S Che Omar
- Department of Physics, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
| | - Y S M Alajerami
- Department of Physics, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
| | - M I Saripan
- FRG Biomedical Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - N M Noor
- Faculty of Medicine and Health Sciences Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - N M Ung
- Clinical Oncology Unit, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - G A Mahdiraji
- Department of Electrical Engineering, Faculty of Engineering Building, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - D A Bradley
- Department of Physics, University of Surrey, Guildford GU2 7XH, U.K; Department of Physics, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - K Alzimami
- Department of Radiological Sciences, Applied Medical Sciences College, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
| |
Collapse
|
19
|
Vijaya Kumar A, Salem Gassar E, Spillmann D, Stock C, Sen YP, Zhang T, Van Kuppevelt TH, Hülsewig C, Koszlowski EO, Pavao MS, Ibrahim SA, Poeter M, Rescher U, Kiesel L, Koduru S, Yip GW, Götte M. HS3ST2
modulates breast cancer cell invasiveness via MAP kinase- and Tcf4 (Tcf7l2)-dependent regulation of protease and cadherin expression. Int J Cancer 2014; 135:2579-92. [DOI: 10.1002/ijc.28921] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 03/15/2014] [Accepted: 04/08/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Archana Vijaya Kumar
- Department of Gynecology and Obstetrics; Münster University Hospital; Münster Germany
| | - Ezeddin Salem Gassar
- Department of Gynecology and Obstetrics; Münster University Hospital; Münster Germany
- Department of Physiology; Faculty of Medicine; Benghazi University; Libya
| | - Dorothe Spillmann
- Department of Medical Biochemistry and Microbiology; The Biomedical Center, Uppsala University; Uppsala Sweden
| | - Christian Stock
- Institute of Physiology II, University of Münster; Münster Germany
| | - Yin-Ping Sen
- Department of Anatomy; Yong Loo Lin School of Medicine, National University of Singapore; Singapore
| | - Ting Zhang
- Department of Anatomy; Yong Loo Lin School of Medicine, National University of Singapore; Singapore
| | - Toin H. Van Kuppevelt
- Department of Biochemistry; NCMLS; Radboud University Medical Centre; Nijmegen The Netherlands
| | - Carolin Hülsewig
- Department of Gynecology and Obstetrics; Münster University Hospital; Münster Germany
| | | | - Mauro S.G. Pavao
- Instituto de Bioquimica Medica, Universidade Federal do Rio de Janeiro; Brazil
| | - Sherif A. Ibrahim
- Department of Zoology; Faculty of Science; Cairo University; Giza Egypt
| | - Michaela Poeter
- Institute of Medical Biochemistry, ZMBE, University of Münster; Münster Germany
| | - Ursula Rescher
- Institute of Medical Biochemistry, ZMBE, University of Münster; Münster Germany
| | - Ludwig Kiesel
- Department of Gynecology and Obstetrics; Münster University Hospital; Münster Germany
| | - Suresh Koduru
- School of Medical Sciences, University of Hyderabad; Hyderabad India
| | - George W. Yip
- Department of Anatomy; Yong Loo Lin School of Medicine, National University of Singapore; Singapore
| | - Martin Götte
- Department of Gynecology and Obstetrics; Münster University Hospital; Münster Germany
| |
Collapse
|
20
|
Ibrahim SA, Hassan H, Vilardo L, Kumar SK, Kumar AV, Kelsch R, Schneider C, Kiesel L, Eich HT, Zucchi I, Reinbold R, Greve B, Götte M. Syndecan-1 (CD138) modulates triple-negative breast cancer stem cell properties via regulation of LRP-6 and IL-6-mediated STAT3 signaling. PLoS One 2013; 8:e85737. [PMID: 24392029 PMCID: PMC3877388 DOI: 10.1371/journal.pone.0085737] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 12/02/2013] [Indexed: 12/17/2022] Open
Abstract
Syndecan-1 (CD138), a heparan sulfate proteoglycan, acts as a coreceptor for growth factors and chemokines and is a molecular marker associated with epithelial-mesenchymal transition during development and carcinogenesis. Resistance of Syndecan-1-deficient mice to experimentally-induced tumorigenesis has been linked to altered Wnt-responsive precursor cell pools, suggesting a potential role of Syndecan-1 in breast cancer cell stem function. However, the precise molecular mechanism is still elusive. Here, we decipher the functional impact of Syndecan-1 knockdown using RNA interference on the breast cancer stem cell phenotype of human triple-negative MDA-MB-231 and hormone receptor-positive MCF-7 cells in vitro employing an analytical flow cytometric approach. Successful Syndecan-1 siRNA knockdown was confirmed by flow cytometry. Side population measurement by Hoechst dye exclusion and Aldehyde dehydrogenase-1 activity revealed that Syndecan-1 knockdown in MDA-MB-231 cells significantly reduced putative cancer stem cell pools by 60% and 27%, respectively, compared to controls. In MCF-7 cells, Syndecan-1 depletion reduced the side population by 40% and Aldehyde dehydrogenase-1 by 50%, repectively. In MDA-MB-231 cells, the CD44(+)CD24(-/low) phenotype decreased significantly by 6% upon siRNA-mediated Syndecan-1 depletion. Intriguingly, IL-6, its receptor sIL-6R, and the chemokine CCL20, implicated in regulating stemness-associated pathways, were downregulated by >40% in Syndecan-1-silenced MDA-MB-231 cells, which showed a dysregulated response to IL-6-induced shifts in E-cadherin and vimentin expression. Furthermore, activation of STAT-3 and NFkB transcription factors and expression of a coreceptor for Wnt signaling, LRP-6, were reduced by >45% in Syndecan-1-depleted cells compared to controls. At the functional level, Syndecan-1 siRNA reduced the formation of spheres and cysts in MCF-7 cells grown in suspension culture. Our study demonstrates the viability of flow cytometric approaches in analyzing cancer stem cell function. As Syndecan-1 modulates the cancer stem cell phenotype via regulation of the Wnt and IL-6/STAT3 signaling pathways, it emerges as a promising novel target for therapeutic approaches.
Collapse
Affiliation(s)
- Sherif A Ibrahim
- Department of Gynecology and Obstetrics, University Hospital Münster, Münster, Germany ; Department of Zoology, Faculty of Science, Cairo University, Giza, Egypt
| | - Hebatallah Hassan
- Department of Gynecology and Obstetrics, University Hospital Münster, Münster, Germany ; Department of Zoology, Faculty of Science, Cairo University, Giza, Egypt
| | | | - Sampath Katakam Kumar
- Department of Gynecology and Obstetrics, University Hospital Münster, Münster, Germany
| | - Archana Vijaya Kumar
- Department of Gynecology and Obstetrics, University Hospital Münster, Münster, Germany
| | - Reinhard Kelsch
- Institute of Transfusion Medicine and Transplantation Immunology, University Hospital Münster, Münster, Germany
| | - Cornelia Schneider
- Department of Gynecology and Obstetrics, University Hospital Münster, Münster, Germany
| | - Ludwig Kiesel
- Department of Gynecology and Obstetrics, University Hospital Münster, Münster, Germany
| | - Hans Theodor Eich
- Department of Radiotherapy - Radiooncology, University Hospital Münster, Münster, Germany
| | | | | | - Burkhard Greve
- Department of Radiotherapy - Radiooncology, University Hospital Münster, Münster, Germany
| | - Martin Götte
- Department of Gynecology and Obstetrics, University Hospital Münster, Münster, Germany
| |
Collapse
|
21
|
Motawi TK, Teleb ZA, El-Boghdady NA, Ibrahim SA. Effect of simvastatin and naringenin coadministration on rat liver DNA fragmentation and cytochrome P450 activity: an in vivo and in vitro study. J Physiol Biochem 2013; 70:225-37. [PMID: 24264056 DOI: 10.1007/s13105-013-0296-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 10/15/2013] [Indexed: 01/05/2023]
Abstract
This study was designed to assess the effect of naringenin (NRG) on simvastatin (SV)-induced hepatic damage in rat and to investigate the effects of these drugs on cytochrome P450 (CYP) 2E1 and 3A1/2 isoforms in order to evaluate the possibility of their coadministration. Hepatic damage in rat was induced by SV (20 and 40 mg/kg/day, po for 30 days). The protective effect of NRG (50 mg/kg/day, po) was identified by estimating liver functions and oxidative stress markers such as lipid peroxidation, reduced glutathione, superoxide dismutase, glutathion s-transferase, and catalase as well as protein profile. DNA fragmentation and histopathological study were carried out to confirm the hepatic damage. An in vitro study was conducted to further evaluate the effect of SV and/or NRG administration on the activities of two microsomal CYP isoenzymes including CYP2E1 and CYP3A1/2. SV exerted an oxidative stress which may contribute to the hepatotoxicity. Administration of NRG in combination with SV significantly improved the liver functions, state of oxidative stress, protein profile, DNA fragmentation, and the histopathological changes. SV and/or NRG have a potential to inhibit CYP3A1/2 and CYP2E1. This study concluded that concurrent administration of NRG with SV provided a protection of liver tissue against the SV-induced hepatic damage. The inhibition of CYP2E1 and CYP3A1/2 by the SV and NRG should be taken into account in order to adjust doses to avoid interaction between SV and NRG and adverse effects of SV.
Collapse
Affiliation(s)
- T K Motawi
- Biochemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | | | | | | |
Collapse
|
22
|
Liu Y, Huang F, Yang H, Ibrahim SA, Wang YF, Huang W. Effects of preservation methods on amino acids and 5'-nucleotides of Agaricus bisporus mushrooms. Food Chem 2013; 149:221-5. [PMID: 24295699 DOI: 10.1016/j.foodchem.2013.10.142] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 09/22/2013] [Accepted: 10/26/2013] [Indexed: 10/26/2022]
Abstract
In this study, the proximate composition, free amino acids content and 5'-nucleotides in frozen, canned and salted Agaricus bisporus (A. bisporus) were investigated. We found that the three kinds of A. bisporus products were good sources of protein, with amount varying in the ranges of 16.54-24.35g/100g (dry weight). Freezing, canning and salting process, followed by 6months of storage led to a significant reduction in free amino acids, especially tyrosine, alanine, glutamine and cysteine. There were medium levels of MSG-like amino acids in frozen A. bisporus and canned A. bisporus, and low levels of MSG-like amino acids in salted A. bisporus. The mount of flavor 5'-nucleotides in frozen A. bisporus was higher than that of canned and salted A. bisporus. The present study thus suggests that freezing is beneficial for the preservation of A. bisporus.
Collapse
Affiliation(s)
- Ying Liu
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | | | | | | | | | | |
Collapse
|
23
|
Karsany MS, Elshayeb AA, Saeed ES, Elaagib R, Ibrahim SA, Elsamani E, Hussien K, Salih KM. Patterns of meningococcal infection in Sudan with emergence of Neisseria meningitidis serogroup W135. East Mediterr Health J 2013; 19:843-846. [PMID: 24313147] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This study was conducted during the 2004-2006 epidemic of meningitis in Sudan to follow-up the frequency of disease outbreak or endemic waves and to evaluate the new quadrivalent vaccine for actual application. Samples were collected from Darfur, El Gedaref, Kassala and Khartoum States and transported to the National Health Central Laboratory in Khartoum. Of 196 patients with clinical symptoms and signs of meningitis, conventional culture identified Neisseria meningitidis in 37 (189%), confirmed by polymerase chain reaction. N. meningitidis type A was identified in 29 (78.4%) patients, type C in 3 (8.1%) and N. meningitidis W135 in 5 (15.5%). The serotyping and molecular diagnosis patterns of N. meningitidis showed the emergence of the new strain, W135, in 5 (15.5%). The patients from the borders of Sudan, 3 from the West Darfur, and 1 each from El Gedaref and Kassala. These could be related to the movement of pilgrims through the borders to Saudi Arabia in the Hajj season. Serious consideration may be needed for quadrivalent vaccination to prevent seasonal and Hajj season outbreaks.
Collapse
Affiliation(s)
- M S Karsany
- Department of Microbiology, College of Medical Laboratory Sciences, Karary University, Khartoum, Sudan
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Ibrahim SA, Asakir SF, Idris AA, Martinez-Urtaza J, Hag Elsafi HE. Prevalence of Salmonella species among asymptomatic food handlers in Khartoum State, Sudan. Br J Biomed Sci 2013; 70:88-9. [PMID: 23888613 DOI: 10.1080/09674845.2013.11978267] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- S A Ibrahim
- School of Health Sciences, Ahfad University for Women; 'Ahfad Centre for Science and Technology, Ahfad University for Women, Omdurman, Sudan.
| | | | | | | | | |
Collapse
|
25
|
Ibrahim SA, Hassan H, Greve B, Kelsch R, Kiesel L, Reinbold R, Götte M. Syndecan-1 (CD138) modulates breast cancer stem cell properties via regulation of IL-6-mediated STAT3 signaling. Exp Clin Endocrinol Diabetes 2013. [DOI: 10.1055/s-0033-1336628] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
26
|
Hassan H, Greve B, Kiesel L, Ibrahim SA, Götte M. Syndecan-1 modulates IL-6- and beta-integrin- dependent functions in breast cancer cell adhesion and migration. Exp Clin Endocrinol Diabetes 2013. [DOI: 10.1055/s-0033-1336639] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
27
|
Hassan H, Greve B, Pavao MSG, Kiesel L, Ibrahim SA, Götte M. Syndecan-1 modulates β-integrin-dependent and interleukin-6-dependent functions in breast cancer cell adhesion, migration, and resistance to irradiation. FEBS J 2013; 280:2216-27. [DOI: 10.1111/febs.12111] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 12/24/2012] [Accepted: 01/01/2013] [Indexed: 12/30/2022]
Affiliation(s)
| | - Burkhard Greve
- Department of Radiotherapy; University Hospital Münster; Germany
| | - Mauro S. G. Pavao
- Instituto de Bioquimica Medica; Universidade Federal do Rio de Janeiro; Brazil
| | - Ludwig Kiesel
- Department of Gynecology and Obstetrics; University Hospital Münster; Germany
| | | | - Martin Götte
- Department of Gynecology and Obstetrics; University Hospital Münster; Germany
| |
Collapse
|
28
|
Ibrahim SA, Yip GW, Stock C, Pan JW, Neubauer C, Poeter M, Pupjalis D, Koo CY, Kelsch R, Schüle R, Rescher U, Kiesel L, Götte M. Targeting of syndecan-1 by microRNA miR-10b promotes breast cancer cell motility and invasiveness via a Rho-GTPase- and E-cadherin-dependent mechanism. Int J Cancer 2012; 131:E884-96. [PMID: 22573479 DOI: 10.1002/ijc.27629] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 04/25/2012] [Indexed: 12/22/2022]
Abstract
microRNAs are small endogenous noncoding RNAs, which post-transcriptionally regulate gene expression. In breast cancer, overexpression of the transmembrane heparan sulfate proteoglycan syndecan-1, a predicted target of the oncomiR miR-10b, correlates with poor clinical outcome. To investigate the potential functional relationship of miR-10b and syndecan-1, MDA-MB-231 and MCF-7 breast cancer cells were transiently transfected with pre-miR-10b, syndecan-1 siRNA or control reagents, respectively. Altered cell behavior was monitored by proliferation, migration and invasion chamber assays, and time-lapse video microscopy. miR-10b overexpression induced post-transcriptional downregulation of syndecan-1, as demonstrated by quantitative real-time PCR (qPCR), flow cytometry, and 3'UTR luciferase assays, resulting in increased cancer cell migration and matrigel invasiveness. Syndecan-1 silencing generated a copy of this phenotype. Adhesion to fibronectin and laminin and basal cell proliferation was increased. Syndecan-1 coimmunoprecipitated with focal adhesion kinase, which showed increased activation upon syndecan-1 depletion. Affymetrix screening and confirmatory qPCR and Western blotting analysis of syndecan-1-deficient cells revealed upregulation of ATF-2, COX-2, cadherin-11, vinculin, actin γ 2, MYL9, transgelin-1, RhoA/C, matrix metalloproteinase 2 (MMP2) and heparanase, and downregulation of AML1/RUNX1, E-cadherin, CLDN1, p21WAF/CIP, cyclin-dependent kinase 6, TLR-4, PAI1/2, Collagen1alpha1, JHDM1D, Mpp4, MMP9, matrilin-2 and ANXA3/A10. Video microscopy demonstrated massively increased Rho kinase-dependent motility of syndecan-1-depleted cells, which displayed increased filopodia formation. We conclude that syndecan-1 is a novel target of the oncomiR miR-10b. Rho-GTPase-dependent modulation of cytoskeletal function and downregulation of E-cadherin expression are identified as relevant effectors of the miR-10b-syndecan-1 axis, which emerges as a promising target for the development of new therapeutic approaches for breast cancer.
Collapse
Affiliation(s)
- Sherif A Ibrahim
- Department of Gynecology and Obstetrics, Münster University Hospital, Münster, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Ibrahim SA, Hamido F, Al Misfer AK, Ghafar SA, Awad A, Salem HK, Alhran H, Khirait S. Anatomical reconstruction of the lateral ligaments using Gracillis tendon in chronic ankle instability; a new technique. Foot Ankle Surg 2011; 17:239-46. [PMID: 22017894 DOI: 10.1016/j.fas.2010.07.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 06/25/2010] [Accepted: 07/25/2010] [Indexed: 02/04/2023]
Abstract
BACKGROUND Many surgical technique have been described to assess the outcome of anatomical reconstruction of the lateral ligaments using Gracillis tendon. This technique aims to restore the stability of the ankle by reconstruction of the talofibular ligament (ATFL) and the calcaneofibular ligament (CFL) using the Gracillis tendon. METHODS From January 2004 to February 2008; inclusive, 16 patients; 11 male and 5 female, underwent an anatomic reconstruction of the lateral ankle ligament for chronic ankle instability. Their ages ranged from 18 to 29 giving a mean age of 25 years. Patients were then subjected to radiologic and clinical assessments for a period of at least 33.5 months. For pain scoring the Americans Orthopaedic Foot and Ankle Society (AOFAS) scores were used; whilst subjective symptom was evaluated using the Olerud and Molander ankle scoring system. RESULTS All patients returned for the final evaluation and subjective excellent or good results were recorded on self-assessment, pain scores, AOFAS and Karissons scores. Additionally Olerud and Molander ankle scoring was also done. During the final follow-up, the mean post-operative AOFAS score was 96 (range 80-100), the Visual analog score was 6 (range 0-4), Karissons score was 94.7 (range 80-100) and last but not least Olerud and Molander score was 87.5 (range 70-100). It was noted that the ankle range of motion was not affected by lateral ankle reconstruction. The talar tilt was reduced from a mean of 12-4° (p<0.0001) and the anterior drawer was reduced from a mean of 11-4mm (p<0.001) by the ankle ligament reconstruction. CONCLUSION Anatomical reconstruction of the lateral ligaments of chronic ankle instability using Gracillis tendon graft resulted in successful results, excellent ankle stability, significant reduction in pain and negligible loss of ankle and hind foot motion.
Collapse
Affiliation(s)
- S A Ibrahim
- Al Razi Orthopaedic Hospital, Sports Medical Centre, Clinical Tutor Medical School, Kuwait University, Kuwait.
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Nwizu EN, Iliyasu Z, Ibrahim SA, Galadanci HS. Socio-demographic and maternal factors in anaemia in pregnancy at booking in Kano, northern Nigeria. Afr J Reprod Health 2011; 15:33-41. [PMID: 22571103] [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: 05/31/2023]
Abstract
Anaemia in pregnancy still causes significant maternal morbidity and mortality in the developing countries including Nigeria. The burden and underlying factors are varied even within countries. We studied the prevalence of anaemia at booking and underlying factors in a teaching hospital in northern Nigeria. Using the capillary technique and blood film, the packed cell volume (PCV) and red cell morphology of 300 pregnant women was determined. Additional information was obtained on sociodemographic characteristics, obstetric and past medical history using an interviewer administered questionnaire. Of the 300 pregnant women studied, 51 (17%) [95% Confidence Interval (CI)=12.9%-21.7%] were anaemic. Specifically, 12.7% and 4.3% of the women had mild and moderate anaemia respectively. Blood film of 74.5%, 15.7% and 11.8% anaemic women showed normochromic normocytic, haemolytic and microcytic hypochromic pictures respectively. Low educational attainment [Adjusted Odds Ratio (AOR)=2.13], being single or divorced [AOR=2.02], high parity [AOR=2.06], late booking [AOR=2.71] and short intervals between pregnancies [AOR=2.37] were significant predictors of anaemia in pregnancy. The high prevalence of anaemia in pregnancy related to low educational and economic status especially among women with background obstetric risk factors calls for vigilance, sustained health education and chemoprophylaxis for pregnant women.
Collapse
Affiliation(s)
- E N Nwizu
- Department of Obstetrics and Gynaecology, Federal Medical Centre, Azare, Bauchi State, Nigeria
| | | | | | | |
Collapse
|
31
|
Carlson VM, Omer MI, Ibrahim SA, Ahmed SE, O’Byrne KJ, Kenny LC, Ryan CA. Fifty years of Sudanese hospital-based obstetric outcomes and an international partnership. BJOG 2011; 118:1608-16. [DOI: 10.1111/j.1471-0528.2011.03092.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
32
|
Ibrahim SA, Samy MA, Matter MK, Saleh AOL. Bone mineral density in Egyptian adolescents and adults with short stature: results of a national survey. East Mediterr Health J 2011; 17:687-693. [PMID: 21977572] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Little is known about bone mass acquisition among stunted adolescents who did not achieve their growth in height. A national survey was made of bone mineral density among stunted adolescents and adults. A multistage stratified random sample of 2500 families (8476 adolescents and their parents) was selected from 6 governorates in different geographical areas of Egypt. Clinical history, anthropometry and measurement of bone mineral density using dual energy X-ray absorptiometry was done. Mean T-scores were significantly lower among both adults and adolescents with short stature compared with those of normal height. The predictors of bone status among adolescent boys were age, body mass index (BMI), height attained (z-score) and maternal T-score and for girls were BMI, age at menarche, paternal T-score and z-score. Stunted adolescents suffered from low bone mass density and low stature adults suffered a high prevalence of osteoporosis.
Collapse
|
33
|
Khaled E, El-Ries MA, Zidane FI, Ibrahim SA, Abd-Elmonem MS. Kinetic catalytic determination of trace levels of iodide based on the oxidation of basic dyes with hydrogen peroxide monitored potentiometrically using simple PVC electrodes. Talanta 2011; 83:1538-43. [PMID: 21238749 DOI: 10.1016/j.talanta.2010.11.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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: 08/20/2010] [Revised: 11/21/2010] [Accepted: 11/22/2010] [Indexed: 11/17/2022]
Abstract
Four sensitive catalytic potentiometric methods have been developed for trace levels determination of iodide based on its catalytic effects on the oxidation of four dyes: viz. variamine blue (VB), rhodamine B (RB), methylene blue (MB) and malachite green (MG), with H(2)O(2) in H(3)PO(4) medium at 25±0.5°C. The catalyzed reaction rates were estimated potentiometrically by monitoring the potential of the corresponding dye-PVC ion selective electrodes. To select the optimized reaction conditions offering the highest sensitivity of the method, parallel studies were carried out on each dye catalyzed reaction including: the effect of reactant concentration, reaction medium and temperature. The working calibration curves were linear over the concentration range from 0.32 to 2.54 mg L(-1) iodide for VB method and from 3.2 to 12.7 mg L(-1) for other ones. The tolerance limits of more than 20 interfering species were listed indicating the high selectivity of the method. Trace iodide in edible salt and pharmaceutical samples was determined without the need for separation or preconcentration procedures.
Collapse
Affiliation(s)
- Elmorsy Khaled
- Microanalysis Laboratory, National Research Center, Dokki, Giza, Egypt.
| | | | | | | | | |
Collapse
|
34
|
AbuGhazaleh AA, Abo El-Nor S, Ibrahim SA. The effect of replacing corn with glycerol on ruminal bacteria in continuous culture fermenters. J Anim Physiol Anim Nutr (Berl) 2010; 95:313-9. [PMID: 20880288 DOI: 10.1111/j.1439-0396.2010.01056.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The effects of substituting corn with glycerol on DNA concentration of selected ruminal bacteria were investigated using continuous fermenters. Four continuous culture fermenters were used in a 4 × 4 Latin Square design with four 10 days consecutive periods. Treatment diets (60:40 forage to concentrate) were fed at 45 g/day dry matter (DM) in three equal portions. Glycerol (0.995 g/g glycerol) was used to replace corn in a grain mix at proportions of 0% (T0; control), 15% (T15), 30% (T30) and 45% (T45). On day 10 of each period, samples were collected from each fermenter 3 h after the morning feeding and analysed for volatile fatty acid and bacterial DNA concentration. Glycerol substitution was related to significantly higher butyrate, valerate and isovalerate concentrations. Compared with the T0 diet, acetate concentration was significantly lower with the T30 and T45 diets whilst propionate concentration was higher only with the T45 diet. The DNA concentrations for Butyrivibrio fibrisolvens and Selenomonas ruminantium decreased with the T30 and T45 diets compared with the T0 diet. No differences in the DNA concentrations for Ruminococcus albus and Succinivibrio dextrinosolvens amongst diets were observed. The findings show that substituting 15% of the dietary corn with glycerol had no substantive effects on fermentation processing or ruminal bacteria. Higher substitution levels, however, may adversely affect ruminal bacteria and negatively impact acetate production.
Collapse
Affiliation(s)
- A A AbuGhazaleh
- Department of Animal Science, Food & Nutrition, Southern Illinois University, Carbondale, IL 62901-4417, USA.
| | | | | |
Collapse
|
35
|
Götte M, Mohr C, Koo CY, Stock C, Vaske AK, Viola M, Ibrahim SA, Peddibhotla S, Teng YHF, Low JY, Ebnet K, Kiesel L, Yip GW. miR-145-dependent targeting of junctional adhesion molecule A and modulation of fascin expression are associated with reduced breast cancer cell motility and invasiveness. Oncogene 2010; 29:6569-80. [PMID: 20818426 DOI: 10.1038/onc.2010.386] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Micro RNAs are small non-coding RNAs, which regulate fundamental cellular and developmental processes at the transcriptional and translational level. In breast cancer, miR-145 expression is downregulated compared with healthy control tissue. As several predicted targets of miR-145 potentially regulate cell motility, we aimed at investigating a potential role for miR-145 in breast cancer cell motility and invasiveness. Assisted by Affymetrix array technology, we demonstrate that overexpression of miR-145 in MDA-MB-231, MCF-7, MDA-MB-468 and SK-BR-3 breast cancer cells and in Ishikawa endometrial carcinoma cells leads to a downregulation of the cell-cell adhesion protein JAM-A and of the actin bundling protein fascin. Moreover, podocalyxin and Serpin E1 mRNA levels were downregulated, and gamma-actin, transgelin and MYL9 were upregulated upon miR-145 overexpression. These miR-145-dependent expression changes drastically decreased cancer cell motility, as revealed by time-lapse video microscopy, scratch wound closure assays and matrigel invasion assays. Immunofluorescence microscopy demonstrated restructuring of the actin cytoskeleton and a change in cell morphology by miR-145 overexpression, resulting in a more cortical actin distribution, and reduced actin stress fiber and filopodia formation. Nuclear rotation was observed in 10% of the pre-miR-145 transfected MDA-MB-231 cells, accompanied by a reduction of perinuclear actin. Luciferase activation assays confirmed direct miR-145-dependent regulation of the 3'UTR of JAM-A, whereas siRNA-mediated knockdown of JAM-A expression resulted in decreased motility and invasiveness of MDA-MB-231 and MCF-7 breast cancer cells. Our data identify JAM-A and fascin as novel targets of miR-145, firmly establishing a role for miR-145 in modulating breast cancer cell motility. Our data provide a rationale for future miR-145-targeted approaches of antimetastatic cancer therapy.
Collapse
Affiliation(s)
- M Götte
- Department of Gynecology and Obstetrics, Münster University Hospital, Münster, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Abstract
A ganglion is a fluid cyst with a myxoid matrix that arises close to the tendons and joints. Its occurrence inside a joint is rare. Among the various pathological conditions producing impairment of the knee function, ganglia of the cruciate ligaments are quite rare. It may be painful or asymptomatic. Some patients may have a trauma history. Ganglia may mimic intra-articular lesions like tears of the anterior cruciate ligament (ACL) or meniscus. Ganglia, though commonly arise from the ACL, can also arise from other structures such as the posterior cruciate ligament (PCL) or meniscus. Ganglia are typically treated by arthroscopic excision and debridement. We report a case of ganglion of the PCL in a 28-year-old man; the lesion was incidentally discovered during ACL reconstruction with double bundle (Rigid fix technique). The patient underwent arthroscopic excision of the ganglion. At the end of 1-year follow-up the patient was pain free; a full range of motion of his right knee was restored, and he returned to his preinjury sport activity.
Collapse
Affiliation(s)
- F Ahmed
- Department of Sport Medicine and Arthroscopic Surgeries, Al Razi Orthopaedic Hospital, Safat, Kuwait.
| | | | | | | |
Collapse
|
37
|
Ebead YH, Selim MA, Ibrahim SA. Solvatochromic, acid-base features and time effect of some azo dyes derived from 1,3-benzothiazol-2-ylacetonitrile: experimental and semiempirical investigations. Spectrochim Acta A Mol Biomol Spectrosc 2010; 75:760-768. [PMID: 20047858 DOI: 10.1016/j.saa.2009.11.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Accepted: 11/19/2009] [Indexed: 05/28/2023]
Abstract
The solvatochromism and other spectroscopic properties of seven azo dyes were studied, with a particular respect to the role of the solvent basicity, and interpreted with the aid of experimental findings and semiempirical data. The electronic absorption spectra of the dyes examined in different solvents combined with theoretical calculations showed that most of the investigated compounds coexist in the hydrazone and/or azo-enamine-common anion equilibrium or in the solely anionic form depending upon the nature of the solvent employed. These interesting features open up possibilities for the use of these compounds in analytical chemistry as acid-base indicators. Furthermore, both of intermolecular and intramolecular charge transfer equilibria have been reflected by experimental absorption spectra of compounds 4 and 5. The enthalpies of formation predicted at PM6 (COSMO) and PM6/CI (COSMO) for the ground (S(0)) and excited (S(1)) states, respectively have been successfully used for the explanation of the observed bathchromic shift in non-polar solvents. The effect of time on the longer wavelength visible band of compound 7 has been thoroughly investigated.
Collapse
Affiliation(s)
- Y H Ebead
- South Valley University, Faculty of Science, Chemistry Department, 83523 Qena, Egypt.
| | | | | |
Collapse
|
38
|
Alkhalifa MS, Ibrahim SA, Osman SH. Pattern and severity of rheumatic valvular lesions in children in Khartoum, Sudan. East Mediterr Health J 2008; 14:1015-1021. [PMID: 19161072] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We determined the pattern and severity of valvular involvement in 100 Sudanese patients with rheumatic heart disease (RHD) in 2 centres in Khartoum in 2003. All the patients underwent history taking, physical examination and Doppler echocardiography. The commonest lesions were mitral regurgitation (84%) and aortic regurgitation (40%). Mitral stenosis alone was uncommon (9%) which could be due to a low detection rate related to the slow stenotic process and the subtle early signs. This, together with the inconsistent history of rheumatic fever, may lead to an underestimate of the prevalence of RHD. There was a strong correlation between severity of the lesion and irregular prophylaxis (P < 0.001).
Collapse
Affiliation(s)
- M S Alkhalifa
- Omdurman Islamic University, Elshaab Teaching Hosptial, Khartoum, Sudan.
| | | | | |
Collapse
|
39
|
Götte M, Nikolova V, Yip GW, Smollich M, Fischgräbe J, Ibrahim SA, Wülfing P, Kiesel L. Die lösliche Form des prognostischen Markers Syndecan-1 fördert die Invasivität von Mammakarzinomzellen durch einen TIMP-1- und E-Cadherin-abhängigen Mechanismus. Geburtshilfe Frauenheilkd 2008. [DOI: 10.1055/s-2008-1075750] [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: 10/21/2022] Open
|
40
|
Emejuaiwe N, Jones AC, Ibrahim SA, Kwoh CK. Disparities in joint replacement utilization: a quality of care issue. Clin Exp Rheumatol 2007; 25:44-49. [PMID: 18021506] [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: 05/25/2023]
Abstract
Although total joint replacement is an effective treatment option for end-stage lower extremity osteoarthritis, racial disparities in joint replacement utilization have been well documented. These disparities may be due in part to patient-level factors such as willingness to consider joint replacement and worse expectations of joint replacement outcomes. In addition, African-Americans may have worse outcomes after total joint replacement and are more likely to have surgery performed by surgeons with lower volumes or in hospitals with lower volumes. All of these issues may be considered concerns with the quality of care delivered to African-Americans with osteoarthritis.
Collapse
Affiliation(s)
- N Emejuaiwe
- University of Pittsburgh, School of Medicine, Pittsburgh, PA 15261, USA
| | | | | | | |
Collapse
|
41
|
AbuGhazaleh AA, Felton DO, Ibrahim SA. Milk Conjugated Linoleic Acid Response to Fish Oil and Sunflower Oil Supplementation to Dairy Cows Managed Under Two Feeding Systems. J Dairy Sci 2007; 90:4763-9. [PMID: 17881699 DOI: 10.3168/jds.2007-0163] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [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: 11/19/2022]
Abstract
Earlier research showed that conjugated linoleic acid (CLA) content in milk fat is highest when cows' diets are supplemented with a blend of fish oil (FO) and linoleic acid-rich oils. The objective of this study was to compare the effect of FO and sunflower oil (SFO) supplementation on milk cis-9, trans-11 CLA when dairy cows managed on pasture or in confinement. Fourteen Holstein cows were assigned into 2 treatment groups: cows grazed on alfalfa-grass pasture (PAS) or were fed corn silage-alfalfa hay mix ad libitum (LOT). Both groups were supplemented with a 8.2 kg/d grain supplement containing 640 g of FO and SFO (1:3 wt/ wt). Grain supplement was fed in 2 equal portions after each milking, for a period of 3 wk. Milk samples were collected during the last 3 d of the experimental period. Milk yield was greater with the LOT diet (23.1 kg/ d) compared with the PAS diet (19.4 kg/d). Milk fat percentages (2.51 and 2.95 for the LOT and PAS, respectively) and yields (0.57 and 0.51 kg/d) were similar for the 2 diets. Milk protein percentages were not affected by diets (3.34 and 3.35 for the LOT and PAS diets, respectively), but protein yields were lower for the PAS diet (0.61 kg/d) compared with the LOT diet (0.75 kg/ d). Treatment diets had no effect on milk trans C18:1 concentrations [10.64 and 9.82 g/100 g of total fatty acids (FA) for the LOT and PAS, respectively] or yields (60.65 and 64.01 g/d), but did affect isomers distributions. Concentration (g/100 g of total FA) of vaccenic acid was lower with the LOT diet (2.15) compared with the PAS diet (4.52), whereas concentration of trans-10 C18:1 was greater with the LOT diet (4.99) compared with the PAS diet (1.69). Milk cis-9, trans-11 CLA concentration was greater with the PAS diet (1.52) compared with the LOT diet (0.84). In conclusion, the increase in milk cis-9, trans-11 CLA content was greater when pasture-based diets were supplemented with FO and SFO. The lower cis-9, trans-11 CLA concentration in milk from the confinement-fed cows resulted from trans-10 C18:1 replacing vaccenic acid as the predominant trans C18:1 isomer.
Collapse
Affiliation(s)
- A A AbuGhazaleh
- Department of Animal Science, Food and Nutrition, Southern Illinois University, Carbondale 62901, USA.
| | | | | |
Collapse
|
42
|
Willis WL, Isikhuemhen OS, Ibrahim SA. Performance Assessment of Broiler Chickens Given Mushroom Extract Alone or in Combination with Probiotics. Poult Sci 2007; 86:1856-60. [PMID: 17704371 DOI: 10.1093/ps/86.9.1856] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [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: 11/12/2022] Open
Abstract
A study was conducted to evaluate the effect of combined Shiitake mushroom (Lentinus edodes) extract with probiotics (PrimaLac) on the growth and health of broiler chickens. In trial 1, 540 d-of-hatch chicks were randomly assigned to 6 treatment groups, replicated 3 times, with 15 males and 15 females per pen for 3 wk. Dietary probiotics and mushroom treatments were as follows: 1) control feed + ad libitum tap water; 2) control feed + skip-a-day mushroom water; 3) control feed + ad libitum mushroom water; 4) probiotic feed + ad libitum tap water; 5) probiotic feed + skip-a-day mushroom water; 6) probiotic feed + ad libitum mushroom water. Body weight gain, feed consumption and efficiency, mortality, bursa, liver, and spleen relative weights of chicks were taken. In trial 2, the performance of broilers 3 to 7 wk withdrawn from the mushroom extract was evaluated along with the comparative level of fecal biofidobacteria in the control and mushroom extract treatment (trt). Mortality, weight gain, feed consumption and efficiency, carcass yield, fat pads, bursa weights and fecal bifidobacteria were measured in trial 2. In trial 1, significant differences (P < 0.05) in female weight gain (trt 4-0.62 vs. trt 1-0.54 kg) and male spleen weights were observed. In trial 2, significant differences were observed in male weight gain (trt 2-2.40 vs. trt 4-1.12 kg), male and female fat pads, male bursa weights (trt 3-0.15 vs. trt 6-0.39), female carcass yield percentage (trt 1-77.8 vs. trt 4-66.4), and feed consumption and efficiency. Body weights were severely depressed in the male broilers receiving the probiotics feed in treatments 4, 5, and 6, but not in the female broilers. These results indicate that performance differences in gender occur with additives during different grow-out periods, and mushroom extract promotes bifidobacteria growth in broiler chickens after 4 wk of withdrawal. It appears that probiotics and mushroom extract offered no combination potential for weight gain, which was compromised in this study, but possible health-enhanced attributes.
Collapse
Affiliation(s)
- W L Willis
- Department of Animal Sciences, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA.
| | | | | |
Collapse
|
43
|
Fouad DM, Ismail NM, El-Gahami MA, Ibrahim SA. Kinetics of the substitution of dehydroacetic acid in tris (dehydroacetato) Fe(III) complex by 8-hydroxyquinoline, di- and tetra-hydroxyquinone. Spectrochim Acta A Mol Biomol Spectrosc 2007; 67:564-7. [PMID: 17049303 DOI: 10.1016/j.saa.2006.05.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2006] [Accepted: 05/05/2006] [Indexed: 05/12/2023]
Abstract
The ligand substitution reactions of dehydroacetic acid (Hdha) in [Fe(dha)(3)] with second ligand such as 8-hydroxyquinoline (Hquin), 1,4-dihydroxyanthraquinone (H(2)dhaq) and 1,4,5,8-tetra-hydroxyanthraquinone (H(4)thaq) were investigated spectrophotometrically by in low polarity solvents like benzene, chloroform and dichloromethane. It is deduced that the substitution reaction takes place through one successive step. The reaction was performed at four different temperatures (5-25) degrees C, and it exhibits a first order dependence on the concentration of the starting complex. The observed rate constant depends on the concentration of both leaving and entering ligands. The evaluation of the kinetic data gives activation parameters which support an associative mechanism in the transition states and the higher rate of substitution of the dha in Fe(dha)(3) complex is due to entropy effect. The solid complexes were synthesized and characterized by elemental analysis, IR and UV-vis spectral techniques.
Collapse
Affiliation(s)
- D M Fouad
- Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt
| | | | | | | |
Collapse
|
44
|
Ibrahim SA, Abdelwahab SF, Mohamed MM, Osman AM, Fathy E, Al-Badry KS, Al-Kady N, Esmat G, Al-Sherbiny MM. T cells are depleted in HCV-induced hepatocellular carcinoma patients: possible role of apoptosis and p53. Retrovirology 2006. [PMCID: PMC1716941 DOI: 10.1186/1742-4690-3-s1-s32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
45
|
Whicker RD, Ibrahim SA. Vertical migration of 134Cs bearing soil particles in arid soils: implications for plutonium redistribution. J Environ Radioact 2006; 88:171-88. [PMID: 16564117 DOI: 10.1016/j.jenvrad.2006.01.010] [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] [Subscribe] [Scholar Register] [Received: 01/21/2006] [Accepted: 01/27/2006] [Indexed: 05/08/2023]
Abstract
Vertical migration of plutonium in soils at the Waste Isolation Pilot Plant (WIPP) and the Rocky Flats Environmental Technology Site (RFETS) was evaluated based on observed 134Cs migration in soil column experiments. After applying 134Cs-labeled soil particles to the surfaces of large, undisturbed soil cores collected from each site, resulting soil columns were subjected to experimental cycles of irrigation plus drying (treatment columns) or to cycles of irrigation only (control columns). Mean losses of 134Cs inventory from soil surfaces were 3.1 +/- 0.6% cycle(-1) and 0.7 +/- 0.6% cycle(-1) respectively for RFETS treatment and control columns. WIPP columns had mean respective losses of 1.3 +/- 1.2% cycle(-1) and 0.5 +/- 0.2% cycle(-1). Bulk transport of labeled soil particles through soil cracks was an important process in RFETS soils, accounting for 64-86% of total 134Cs migration. Colloidal transport processes governed migration in WIPP soils.
Collapse
Affiliation(s)
- R D Whicker
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO 80523, USA.
| | | |
Collapse
|
46
|
Ibrahim SA, Abdelwahab SF, Mohamed MM, Osman AM, Fathy E, Al-Badry KS, Al-Kady N, Esmat GE, Al-Sherbiny MM. T cells are depleted in HCV-Induced hepatocellular carcinoma patients: possible role of apoptosis and p53. Egypt J Immunol 2006; 13:11-22. [PMID: 18689267 DOI: pmid/18689267] [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: 02/08/2023]
Abstract
Egypt has possibly the highest Hepatitis C Virus (HCV) prevalence worldwide. A high proportion of HCV infections become chronic and lead to liver cirrhosis and hepatocellular carcinoma (HCC). The cellular and molecular mechanisms behind HCV infection complication are not completely understood although apoptosis has been implicated in this process. Using flowcytometry, we examined whether T lymphocyte; isolated from patients with HCV and HCV-associated HCC (HCV-HCC); are predestined in vivo to undergo spontaneous apoptosis. Also, the role of p53; a key protein in apoptotic process; in the development of HCC was examined. Our data showed that T cells were severely depleted in HCV-HCC patients and its spontaneous apoptosis was higher in patient groups as compared to normal controls. In addition, p53 expression in liver tissue (determined by ELISA) was higher in the HCC patient groups as compared to normal controls and correlated well with the HCC grade. In conclusion, HCV infection induces peripheral T cell apoptosis, depletion and subsequently immune-suppression and this may lead to persistence of infection. Also, p53 is implicated in the poor prognosis of HCV-HCC and could be used as a predictive marker to assess the prognosis of HCC patients.
Collapse
Affiliation(s)
- Sherif A Ibrahim
- Department of Zoology, Faculty of Science, Cairo University, Egypt
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Ibrahim SA, Muntaner C, Kerr M, Mustard C, Gnam W. 497: Job Insecurity, Social Class and Inequalities in Mental Health using the Canadian Community Health Survey (CCHS) Cycle 1.2. Am J Epidemiol 2005. [DOI: 10.1093/aje/161.supplement_1.s125] [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: 11/13/2022] Open
Affiliation(s)
- S A Ibrahim
- Institute for Work & Health, Toronto, Canada
| | - C Muntaner
- Institute for Work & Health, Toronto, Canada
| | - M Kerr
- Institute for Work & Health, Toronto, Canada
| | - C Mustard
- Institute for Work & Health, Toronto, Canada
| | - W Gnam
- Institute for Work & Health, Toronto, Canada
| |
Collapse
|
48
|
Bertley FMN, Ibrahim SA, Libman M, Ward BJ. Measles vaccination in the presence of maternal antibodies primes for a balanced humoral and cellular response to revaccination. Vaccine 2005; 23:444-9. [PMID: 15530692 DOI: 10.1016/j.vaccine.2004.06.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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: 11/14/2002] [Revised: 05/17/2004] [Accepted: 06/30/2004] [Indexed: 10/26/2022]
Abstract
Early or low dose antigen exposure can prime the immune system for subsequent responses; the so-called "prime-boost" effect. In the context of a Sudanese measles vaccine trial, we assessed whether or not such early exposure could influence the response to revaccination. Children received either Connaught high titer vaccine (CN: n = 53; 10(4.7)pfu) or meningococcal A + C vaccine as a placebo (MEN: n = 58) at 5 months of age. At 9 months of age, all received standard titer Schwarz vaccine (SCH: 10(3.9)pfu). Neutralizing antibodies were measured before initial vaccination and at 9 months of age (plaque reduction neutralization assay (PRN)) and again at 5 years of age (syncytium inhibition assay (SIA)). Lymphoproliferative responses to measles virus (MV) antigens were evaluated at 5 years of age. Eleven of the 53 CN-SCH children (21%) had sub-protective neutralizing antibody titers prior to revaccination (log PRN 1.5 +/- 0.03 versus 2.9 +/- 0.07 in the remaining 42 children; P < 0.004). Maternal antibody titers at the time of initial vaccination in these 11 were high (PRN 2.44 +/- 0.12 versus 1.9 +/- 0.04; P < 0.0001). At 5 years of age, neutralizing antibodies were comparable in the 11 CN-SCH poor responders (log SIA 2.1 +/- 0.09), the remaining CN-SCH children (2.2 +/- 0.06) and the MEN-SCH group vaccinated only once at 9 months of age (2.25 +/- 0.06). In contrast, 7/11 of the CN-SCH poor responders (64%) had stimulation indices (SI) > 3 in response to MV antigens at 5 years of age (SI 3.1 +/- 0.6) compared with only 14% in the remaining children of the CN-SCH group (2.0 +/- 0.3; P = 0.05) and 8% in the MEN-SCH group (1.4 +/- 0.2; P < 0.0003). These data suggest that early measles vaccination in the presence of maternal antibodies can sometimes prime for a balanced humoral and cellular immune response to subsequent revaccination.
Collapse
Affiliation(s)
- F M N Bertley
- Center for the Study of Host Resistance, Montreal General Hospital, McGill University, 1650 Cedar Avenue, Montreal, QC, Canada H3G 1A4
| | | | | | | |
Collapse
|
49
|
El Mubarak HS, Yüksel S, Mustafa OM, Ibrahim SA, Osterhaus ADME, de Swart RL. Surveillance of measles in the Sudan using filter paper blood samples. J Med Virol 2004; 73:624-30. [PMID: 15221910 DOI: 10.1002/jmv.20136] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [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: 11/06/2022]
Abstract
Dried blood spots collected on filter paper are considered potential clinical specimens for measles surveillance because of their ease of collection, storage, and transport. The usefulness of these samples for surveillance of measles was evaluated in a field setting. Blood spots were collected by finger-prick from 316 clinically diagnosed measles patients in suburban Khartoum, mostly within a week after onset of the rash. Samples were collected between October, 2000 and April, 2003, and stored at 4 degrees C. Measles virus-specific IgM antibodies were detected in 200 (63%) of the samples using an "in-house" IgM capture ELISA. For 201 samples reconstitution and IgM measurement was repeated 1 year after initial testing with essentially the same results, showing the stability of IgM in the filter paper under these conditions. In a limited number of samples (n = 38) measles virus-specific IgM was also tested with a commercial indirect IgM ELISA. Although the results of the two assays correlated well, the "in-house" IgM capture ELISA proved slightly more sensitive. Measles virus-specific reverse transcriptase polymerase chain reaction (RT-PCR) amplicons were obtained from 16 of 57 (28%) samples tested. Sequencing of the 3' 456 nucleotides of the nucleoprotein gene showed the continued endemic circulation of genotype B3 viruses identified previously in this region. Although problems related to limited sample quantities were encountered, the present study confirms the usefulness of dried blood spots for measles surveillance. The results also demonstrate that measles continues to be endemic in the Sudan.
Collapse
Affiliation(s)
- H S El Mubarak
- Department of Virology, Erasmus MC, Rotterdam, The Netherlands
| | | | | | | | | | | |
Collapse
|
50
|
El Mubarak HS, Ibrahim SA, Vos HW, Mukhtar MM, Mustafa OA, Wild TF, Osterhaus ADME, de Swart RL. Measles virus protein-specific IgM, IgA, and IgG subclass responses during the acute and convalescent phase of infection. J Med Virol 2004; 72:290-8. [PMID: 14695672 DOI: 10.1002/jmv.10553] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [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: 11/06/2022]
Abstract
The availability of new generation serological assays allowed re-evaluation of the antibody response to measles virus. IgM, IgA, total IgG, and IgG subclass responses were studied to the three major immunogenic measles virus proteins: the fusion protein (F), haemagglutinin (H), and nucleoprotein (N). Plasma samples were obtained from clinically diagnosed measles cases (n = 146) in Khartoum (Sudan) within a week after onset of the rash. Convalescent phase samples were collected from 32 of 117 laboratory-confirmed measles cases at different time points after onset of rash. Glycoprotein-specific IgM, IgG, and IgA antibody levels correlated well to the N-specific response. For IgG and IgA, responses to F were higher than to H. IgA antibody levels were undetectable in about one third of the laboratory-confirmed cases during the acute phase, but positive in all patients tested 1-4 weeks after infection. IgM levels declined rapidly and were lost 3-6 months after infection. IgA levels declined slowly during the first year but did not return to background levels during the subsequent 2 years. IgG avidity maturation was detected during a 3-6 month period after infection. The predominant IgG subclasses during the acute phase were IgG(1) and IgG(3). The latter was lost in the convalescent phase, while the IgG(4) isotype showed a slight rise afterwards. Interestingly, acute phase IgG(3) and IgA responses were associated, and were only detected in samples with high IgG. This study provides a comprehensive perspective on the antibody response to wild-type measles virus infection.
Collapse
Affiliation(s)
- H S El Mubarak
- Department of Virology, Erasmus MC, Rotterdam, The Netherlands
| | | | | | | | | | | | | | | |
Collapse
|