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Li X, Chang K, Abbas SM, El-Tawil RS, Abdel-Ghany AE, Hashem AM, Wang H, Coughlin AL, Zhang S, Mauger A, Zhu L, Julien CM. Silver Nanocoating of LiNi 0.8Co 0.1Mn 0.1O 2 Cathode Material for Lithium-Ion Batteries. Micromachines (Basel) 2023; 14:mi14050907. [PMID: 37241530 DOI: 10.3390/mi14050907] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/10/2023] [Accepted: 04/20/2023] [Indexed: 05/28/2023]
Abstract
Surface coating has become an effective approach to improve the electrochemical performance of Ni-rich cathode materials. In this study, we investigated the nature of an Ag coating layer and its effect on electrochemical properties of the LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode material, which was synthesized using 3 mol.% of silver nanoparticles by a facile, cost-effective, scalable and convenient method. We conducted structural analyses using X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy, which revealed that the Ag nanoparticle coating did not affect the layered structure of NCM811. The Ag-coated sample had less cation mixing compared to the pristine NMC811, which could be attributed to the surface protection of Ag coating from air contamination. The Ag-coated NCM811 exhibited better kinetics than the pristine one, which is attributed to the higher electronic conductivity and better layered structure provided by the Ag nanoparticle coating. The Ag-coated NCM811 delivered a discharge capacity of 185 mAh·g-1 at the first cycle and 120 mAh·g-1 at the 100th cycle, respectively, which is better than the pristine NMC811.
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Affiliation(s)
- Xintong Li
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Kai Chang
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Somia M Abbas
- National Research Centre, Inorganic Chemistry Department, Behoes Street, Dokki, Giza 12622, Egypt
| | - Rasha S El-Tawil
- National Research Centre, Inorganic Chemistry Department, Behoes Street, Dokki, Giza 12622, Egypt
| | - Ashraf E Abdel-Ghany
- National Research Centre, Inorganic Chemistry Department, Behoes Street, Dokki, Giza 12622, Egypt
| | - Ahmed M Hashem
- National Research Centre, Inorganic Chemistry Department, Behoes Street, Dokki, Giza 12622, Egypt
| | - Hua Wang
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Amanda L Coughlin
- Department of Physics, Indiana University, Bloomington, IN 47405, USA
| | - Shixiong Zhang
- Department of Physics, Indiana University, Bloomington, IN 47405, USA
- Quantum Science and Engineering Center, Indiana University, Bloomington, IN 47405, USA
| | - Alain Mauger
- Institut de Minéralogie, de Physique des Matériaux et Cosmologie (IMPMC), Sorbonne Université, UMR-CNRS 7590, 4 Place Jussieu, 75752 Paris, France
| | - Likun Zhu
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
| | - Christian M Julien
- Institut de Minéralogie, de Physique des Matériaux et Cosmologie (IMPMC), Sorbonne Université, UMR-CNRS 7590, 4 Place Jussieu, 75752 Paris, France
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Wang H, Hashem AM, Abdel-Ghany AE, Abbas SM, El-Tawil RS, Li T, Li X, El-Mounayri H, Tovar A, Zhu L, Mauger A, Julien CM. Effect of Cationic (Na +) and Anionic (F -) Co-Doping on the Structural and Electrochemical Properties of LiNi 1/3Mn 1/3Co 1/3O 2 Cathode Material for Lithium-Ion Batteries. Int J Mol Sci 2022; 23:ijms23126755. [PMID: 35743197 PMCID: PMC9223843 DOI: 10.3390/ijms23126755] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/08/2022] [Accepted: 06/16/2022] [Indexed: 02/01/2023] Open
Abstract
Elemental doping for substituting lithium or oxygen sites has become a simple and effective technique to improve the electrochemical performance of layered cathode materials. Compared with single-element doping, this work presents an unprecedented contribution to the study of the effect of Na+/F− co-doping on the structure and electrochemical performance of LiNi1/3Mn1/3Co1/3O2. The co-doped Li1-zNazNi1/3Mn1/3Co1/3O2-zFz (z = 0.025) and pristine LiNi1/3Co1/3Mn1/3O2 materials were synthesized via the sol–gel method using EDTA as a chelating agent. Structural analyses, carried out by X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy, revealed that the Na+ and F− dopants were successfully incorporated into the Li and O sites, respectively. The co-doping resulted in larger Li-slab spacing, a lower degree of cation mixing, and the stabilization of the surface structure, which substantially enhanced the cycling stability and rate capability of the cathode material. The Na/F co-doped LiNi1/3Mn1/3Co1/3O2 electrode delivered an initial specific capacity of 142 mAh g−1 at a 1C rate (178 mAh g−1 at 0.1C), and it maintained 50% of its initial capacity after 1000 charge–discharge cycles at a 1C rate.
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Affiliation(s)
- Hua Wang
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA; (H.W.); (X.L.); (H.E.-M.); (A.T.); (L.Z.)
| | - Ahmed M. Hashem
- Inorganic Chemistry Department, National Research Centre, 33 El Bohouth St., (Former El Tahrir St.), Dokki, Giza 12622, Egypt; (A.M.H.); (A.E.A.-G.); (S.M.A.); (R.S.E.-T.)
| | - Ashraf E. Abdel-Ghany
- Inorganic Chemistry Department, National Research Centre, 33 El Bohouth St., (Former El Tahrir St.), Dokki, Giza 12622, Egypt; (A.M.H.); (A.E.A.-G.); (S.M.A.); (R.S.E.-T.)
| | - Somia M. Abbas
- Inorganic Chemistry Department, National Research Centre, 33 El Bohouth St., (Former El Tahrir St.), Dokki, Giza 12622, Egypt; (A.M.H.); (A.E.A.-G.); (S.M.A.); (R.S.E.-T.)
| | - Rasha S. El-Tawil
- Inorganic Chemistry Department, National Research Centre, 33 El Bohouth St., (Former El Tahrir St.), Dokki, Giza 12622, Egypt; (A.M.H.); (A.E.A.-G.); (S.M.A.); (R.S.E.-T.)
| | - Tianyi Li
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA;
| | - Xintong Li
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA; (H.W.); (X.L.); (H.E.-M.); (A.T.); (L.Z.)
| | - Hazim El-Mounayri
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA; (H.W.); (X.L.); (H.E.-M.); (A.T.); (L.Z.)
| | - Andres Tovar
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA; (H.W.); (X.L.); (H.E.-M.); (A.T.); (L.Z.)
| | - Likun Zhu
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA; (H.W.); (X.L.); (H.E.-M.); (A.T.); (L.Z.)
| | - Alain Mauger
- Institut de Minéralogie, de Physique des Matériaux et Cosmologie (IMPMC), Sorbonne Université, UMR-CNRS 7590, 4 Place Jussieu, 75752 Paris, France;
| | - Christian M. Julien
- Institut de Minéralogie, de Physique des Matériaux et Cosmologie (IMPMC), Sorbonne Université, UMR-CNRS 7590, 4 Place Jussieu, 75752 Paris, France;
- Correspondence:
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El-Badri AM, Hashem AM, Batool M, Sherif A, Nishawy E, Ayaad M, Hassan HM, Elrewainy IM, Wang J, Kuai J, Wang B, Zheng S, Zhou G. Comparative efficacy of bio-selenium nanoparticles and sodium selenite on morpho-physiochemical attributes under normal and salt stress conditions, besides selenium detoxification pathways in Brassica napus L. J Nanobiotechnology 2022; 20:163. [PMID: 35351148 PMCID: PMC8962572 DOI: 10.1186/s12951-022-01370-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 03/11/2022] [Indexed: 01/13/2023] Open
Abstract
Selenium nanoparticles (SeNPs) have attracted considerable attention globally due to their significant potential for alleviating abiotic stresses in plants. Accordingly, further research has been conducted to develop nanoparticles using chemical ways. However, our knowledge about the potential benefit or phytotoxicity of bioSeNPs in rapeseed is still unclear. Herein, we investigated the effect of bioSeNPs on growth and physiochemical attributes, and selenium detoxification pathways compared to sodium selenite (Se (IV)) during the early seedling stage under normal and salt stress conditions. Our findings showed that the range between optimal and toxic levels of bioSeNPs was wider than Se (IV), which increased the plant’s ability to reduce salinity-induced oxidative stress. BioSeNPs improved the phenotypic characteristics of rapeseed seedlings without the sign of toxicity, markedly elevated germination, growth, photosynthetic efficiency and osmolyte accumulation versus Se (IV) under normal and salt stress conditions. In addition to modulation of Na+ and K+ uptake, bioSeNPs minimized the ROS level and MDA content by activating the antioxidant enzymes engaged in ROS detoxification by regulating these enzyme-related genes expression patterns. Importantly, the main effect of bioSeNPs and Se (IV) on plant growth appeared to be correlated with the change in the expression levels of Se-related genes. Our qRT-PCR results revealed that the genes involved in Se detoxification in root tissue were upregulated upon Se (IV) treated seedlings compared to NPs, indicating that bioSeNPs have a slightly toxic effect under higher concentrations. Furthermore, bioSeNPs might improve lateral root production by increasing the expression level of LBD16. Taken together, transamination and selenation were more functional methods of Se detoxification and proposed different degradation pathways that synthesized malformed or deformed selenoproteins, which provided essential mechanisms to increase Se tolerance at higher concentrations in rapeseed seedlings. Current findings could add more knowledge regarding the mechanisms underlying bioSeNPs induced plant growth.
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Affiliation(s)
- Ali Mahmoud El-Badri
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Field Crops Research Institute, Agricultural Research Center (ARC), Giza, 12619, Egypt
| | - Ahmed M Hashem
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Biotechnology Department, Faculty of Agriculture, Al-Azhar University, Cairo, 11651, Egypt
| | - Maria Batool
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Ahmed Sherif
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.,Field Crops Research Institute, Agricultural Research Center (ARC), Giza, 12619, Egypt
| | - Elsayed Nishawy
- Desert Research Center, Genetics Resource Department, Egyptian Deserts Gene Bank, Cairo, 11735, Egypt
| | - Mohammed Ayaad
- Plant Research Department, Nuclear Research Center, Atomic Energy Authority, Abo Zaabal, Cairo, 13795, Egypt
| | - Hamada M Hassan
- Field Crops Research Institute, Agricultural Research Center (ARC), Giza, 12619, Egypt
| | - Ibrahim M Elrewainy
- Field Crops Research Institute, Agricultural Research Center (ARC), Giza, 12619, Egypt
| | - Jing Wang
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Jie Kuai
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Bo Wang
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
| | - Shixue Zheng
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Guangsheng Zhou
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
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El-Badri AM, Batool M, Wang C, Hashem AM, Tabl KM, Nishawy E, Kuai J, Zhou G, Wang B. Selenium and zinc oxide nanoparticles modulate the molecular and morpho-physiological processes during seed germination of Brassica napus under salt stress. Ecotoxicol Environ Saf 2021; 225:112695. [PMID: 34478972 DOI: 10.1016/j.ecoenv.2021.112695] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 08/19/2021] [Accepted: 08/21/2021] [Indexed: 05/09/2023]
Abstract
The advent of the nanotechnology era offers a unique opportunity for sustainable agriculture, and the contribution of nanoparticles (NPs) to ameliorate abiotic stresses became the new area of interest for researchers due to their special physiochemical characteristics in the biological system. Salinity is a key devastating abiotic factor that hinders the development and yield of rapeseed. On the flip side, the impact of nanoparticles on plant hormones upon salt stress during seed imbibition and germination has been poorly understood. Hence, we aimed to study the influence of nanopriming on plant hormones and germination processes using selenium and zinc oxide nanoparticles (SeNPs and ZnONPs) during seed imbibition and the early seedling stage upon salinity stress. Nanopriming showed a positive effect on final germination percentage, germination rate, seed microstructure, and antioxidant enzyme activity of two rapeseed cultivars under salt stress. Moreover, nano-treatment decreased the expression of abscisic acid related genes BnCYP707A1, 3, and 4 during the priming time and after sowing, where the levels of BnCYP707A1, and 3 genes showed a slightly significant difference between the nanopriming and hydropriming, which gave an evidence that the nanopriming influenced the ABA levels then elevated the seed germination with SeNPs and ZnONPs. Likewise, nanoparticles significantly elevated the expression levels of BnGA20ox, BnGA3ox and BnCPS genes during the germination stage, especially at 24 h after being sown in salt stress. That confirms the positive role of SeNPs and ZnONPs in regulating gibberellic acid level, which increases the germination in primed seeds as compared to unprimed seeds and hydroprimed seeds. Additionally, our results demonstrated that nanopriming regulated the expression level of BnCAM and BnPER during priming time and after sowing, along with the various levels of expression remarkably in BnEXP4 and BnRAB28, especially at 24 h of being sown under salt stress, which promoted seed germination and early seedling growth. Overall, this work provides new insights into mechanisms underlying the interactions of SeNPs and ZnONPs with plant hormones during the seed imbibition and early seedling stage, consequently enhanced plant growth and development. Additionally, these findings portrayed that the application of SeNPs and ZnONPs could be a new strategy and useful approach to enhance tolerance against salinity in rapeseed plants.
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Affiliation(s)
- Ali Mahmoud El-Badri
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; Field Crops Research Institute, Agricultural Research Center (ARC), Giza 12619, Egypt
| | - Maria Batool
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Chunyun Wang
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Ahmed M Hashem
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; Biotechnology Department, Faculty of Agriculture, Al-Azhar University, Cairo 11651, Egypt
| | - Karim M Tabl
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; Agricultural Botany Department, Faculty of Agriculture (Saba Basha), Alexandria University, 21531 Alexandria, Egypt
| | - Elsayed Nishawy
- Desert Research Center, Genetics Resource Department, Egyptian Deserts Gene Bank, Cairo 11735, Egypt
| | - Jie Kuai
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Guangsheng Zhou
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Bo Wang
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China.
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Hashem AM, Couto RA, Surek C, Swanson M, Zins JE. Facelift Part II: Surgical Techniques and Complications. Aesthet Surg J 2021; 41:NP1276-NP1294. [PMID: 33558887 DOI: 10.1093/asj/sjab081] [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: 11/13/2022] Open
Abstract
Although previous publications have reviewed face and necklift anatomy and technique from different perspectives, seldom were the most relevant anatomical details and widely practiced techniques comprehensively summarized in a single work. As a result, the beginner is left with a plethora of varied publications that require sorting, rearrangement, and critical reading. A recent survey of US plastic surgery residents and program directors disclosed less facility with facelift surgery compared with aesthetic surgery of the breast and trunk. To this end, 4 of the widely practiced facelift techniques (ie, minimal access cranial suspension-lift, lateral-SMASectomy, extended-SMAS, and composite rhytidectomy) are described in an easy review format. The highlights of each are formatted followed by a summary of complications. Finally, the merits and limitations of these individual techniques are thoroughly compared and discussed. LEVEL OF EVIDENCE: 4
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Affiliation(s)
- Ahmed M Hashem
- Department of Plastic Surgery at Cairo University, Cairo, Egypt
| | | | | | - Marco Swanson
- Department of Plastic Surgery at Case Western University, Cleveland, OH, USA
| | - James E Zins
- Department of Plastic Surgery at Cleveland Clinic Foundation, Cleveland, OH, USA
- Facial Surgery co-section editor for Aesthetic Surgery Journal
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Hashem AM, Moore S, Chen S, Hu C, Zhao Q, Elesawi IE, Feng Y, Topping JF, Liu J, Lindsey K, Chen C. Putrescine Depletion Affects Arabidopsis Root Meristem Size by Modulating Auxin and Cytokinin Signaling and ROS Accumulation. Int J Mol Sci 2021; 22:4094. [PMID: 33920993 PMCID: PMC8071467 DOI: 10.3390/ijms22084094] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/11/2021] [Accepted: 04/12/2021] [Indexed: 02/07/2023] Open
Abstract
Polyamines (PAs) dramatically affect root architecture and development, mainly by unknown mechanisms; however, accumulating evidence points to hormone signaling and reactive oxygen species (ROS) as candidate mechanisms. To test this hypothesis, PA levels were modified by progressively reducing ADC1/2 activity and Put levels, and then changes in root meristematic zone (MZ) size, ROS, and auxin and cytokinin (CK) signaling were investigated. Decreasing putrescine resulted in an interesting inverted-U-trend in primary root growth and a similar trend in MZ size, and differential changes in putrescine (Put), spermidine (Spd), and combined spermine (Spm) plus thermospermine (Tspm) levels. At low Put concentrations, ROS accumulation increased coincidently with decreasing MZ size, and treatment with ROS scavenger KI partially rescued this phenotype. Analysis of double AtrbohD/F loss-of-function mutants indicated that NADPH oxidases were not involved in H2O2 accumulation and that elevated ROS levels were due to changes in PA back-conversion, terminal catabolism, PA ROS scavenging, or another pathway. Decreasing Put resulted in a non-linear trend in auxin signaling, whereas CK signaling decreased, re-balancing auxin and CK signaling. Different levels of Put modulated the expression of PIN1 and PIN2 auxin transporters, indicating changes to auxin distribution. These data strongly suggest that PAs modulate MZ size through both hormone signaling and ROS accumulation in Arabidopsis.
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Affiliation(s)
- Ahmed M. Hashem
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (A.M.H.); (S.M.); (S.C.); (C.H.); (Q.Z.); (I.E.E.); (Y.F.)
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering, College of Life Science, Guizhou University, Guiyang 550025, China
- Biotechnology Department, Faculty of Agriculture, Al-Azhar University, Cairo 11651, Egypt
| | - Simon Moore
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (A.M.H.); (S.M.); (S.C.); (C.H.); (Q.Z.); (I.E.E.); (Y.F.)
- Department of Biosciences, Durham University, South Road, Durham DH1 3LE, UK; (J.F.T.); (J.L.); (K.L.)
| | - Shangjian Chen
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (A.M.H.); (S.M.); (S.C.); (C.H.); (Q.Z.); (I.E.E.); (Y.F.)
| | - Chenchen Hu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (A.M.H.); (S.M.); (S.C.); (C.H.); (Q.Z.); (I.E.E.); (Y.F.)
| | - Qing Zhao
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (A.M.H.); (S.M.); (S.C.); (C.H.); (Q.Z.); (I.E.E.); (Y.F.)
| | - Ibrahim Eid Elesawi
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (A.M.H.); (S.M.); (S.C.); (C.H.); (Q.Z.); (I.E.E.); (Y.F.)
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering, College of Life Science, Guizhou University, Guiyang 550025, China
- Agricultural Biochemistry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Yanni Feng
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (A.M.H.); (S.M.); (S.C.); (C.H.); (Q.Z.); (I.E.E.); (Y.F.)
| | - Jennifer F. Topping
- Department of Biosciences, Durham University, South Road, Durham DH1 3LE, UK; (J.F.T.); (J.L.); (K.L.)
| | - Junli Liu
- Department of Biosciences, Durham University, South Road, Durham DH1 3LE, UK; (J.F.T.); (J.L.); (K.L.)
| | - Keith Lindsey
- Department of Biosciences, Durham University, South Road, Durham DH1 3LE, UK; (J.F.T.); (J.L.); (K.L.)
| | - Chunli Chen
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (A.M.H.); (S.M.); (S.C.); (C.H.); (Q.Z.); (I.E.E.); (Y.F.)
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering, College of Life Science, Guizhou University, Guiyang 550025, China
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Hashem AM, Couto RA, Duraes EFR, Çakmakoğlu Ç, Swanson M, Surek C, Zins JE. Facelift Part I: History, Anatomy, and Clinical Assessment. Aesthet Surg J 2020; 40:1-18. [PMID: 30843042 DOI: 10.1093/asj/sjy326] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this article, the authors aim to thoroughly describe the critical surgical anatomy of the facial layers, the retaining ligamentous attachments of the face, and the complex three-dimensional course of the pertinent nerves. This is supplemented with clarifying anatomic dissections and artwork figures whenever possible to enable easy, sound, and safe navigation during surgery. The historic milestones that led the evolution of cervicofacial rejuvenation to the art we know today are summarized at the beginning, and the pearls of the relevant facial analysis that permit accurate clinical judgment and hence individualized treatment strategies are highlighted at the end. The facelift operation remains the cornerstone of face and neck rejuvenation. Despite the emergence of numerous less invasive modalities, surgery continues to be the most powerful and more durable technique to modify facial appearance. All other procedures designed to ameliorate facial aging are either built around or serve as adjuncts to this formidable craft.
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Affiliation(s)
- Ahmed M Hashem
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - Rafael A Couto
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | | | | | - Marco Swanson
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - Chris Surek
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - James E Zins
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
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Hashem AM, Hassan AM, Tolah AM, Alsaadi MA, Abunada Q, Damanhouri GA, El-Kafrawy SA, Picard-Maureau M, Azhar EI, Hindawi SI. Amotosalen and ultraviolet A light efficiently inactivate MERS-coronavirus in human platelet concentrates. Transfus Med 2019; 29:434-441. [PMID: 31696565 PMCID: PMC7169717 DOI: 10.1111/tme.12638] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/06/2019] [Accepted: 09/09/2019] [Indexed: 12/12/2022]
Abstract
Objective This study aimed to assess the efficacy of the INTERCEPT™ Blood System [amotosalen/ultraviolet A (UVA) light] to reduce the risk of Middle East respiratory syndrome‐Coronavirus (MERS‐CoV) transmission by human platelet concentrates. Background Since 2012, more than 2425 MERS‐CoV human cases have been reported in 27 countries. The infection causes acute respiratory disease, which was responsible for 838 deaths in these countries, mainly in Saudi Arabia. Viral genomic RNA was detected in whole blood, serum and plasma of infected patients, raising concerns of the safety of blood supplies, especially in endemic areas. Methods Four apheresis platelet units in 100% plasma were inoculated with a clinical MERS‐CoV isolate. Spiked units were then treated with amotosalen/UVA to inactivate MERS‐CoV. Infectious and genomic viral titres were quantified by plaque assay and quantitative real‐time reverse transcription polymerase chain reaction (RT‐qPCR). Inactivated samples were successively passaged thrice on Vero E6 cells to exclude the presence of residual replication‐competent viral particles in inactivated platelets. Results Complete inactivation of MERS‐CoV in spiked platelet units was achieved by treatment with Amotosalen/UVA light with a mean log reduction of 4·48 ± 0·3. Passaging of the inactivated samples in Vero E6 showed no viral replication even after nine days of incubation and three passages. Viral genomic RNA titration in inactivated samples showed titres comparable to those in pre‐treatment samples. Conclusion Amotosalen and UVA light treatment of MERS‐CoV‐spiked platelet concentrates efficiently and completely inactivated MERS‐CoV infectivity (>4 logs), suggesting that such treatment could minimise the risk of transfusion‐related MERS‐CoV transmission.
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Affiliation(s)
- A M Hashem
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Vaccines and Immunotherapy Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Microbiology and Parasitology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - A M Hassan
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - A M Tolah
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - M A Alsaadi
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Q Abunada
- Cerus Europe B.V, Amersfoort, The Netherlands
| | - G A Damanhouri
- Department of Hematology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - S A El-Kafrawy
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | | | - E I Azhar
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - S I Hindawi
- Department of Hematology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
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9
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El-Tawil RS, El-Wakeel ST, Abdel-Ghany AE, Abuzeid HAM, Selim KA, Hashem AM. Silver/quartz nanocomposite as an adsorbent for removal of mercury (II) ions from aqueous solutions. Heliyon 2019; 5:e02415. [PMID: 31528746 PMCID: PMC6742848 DOI: 10.1016/j.heliyon.2019.e02415] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/09/2019] [Accepted: 08/30/2019] [Indexed: 11/30/2022] Open
Abstract
Silver nanoparticles (AgNPs) and silver/quartz nanocomposite (Ag/Q)NPs)) were synthesized by sol-gel method using table sugar as chelating agent. The synthesized nanosized materials were used for mercury ions adsorption from aqueous solutions. The materials were characterized by X-ray diffraction (XRD), Transmission Electron microscope (TEM), and surface area (BET). Adsorption of Hg2+ (10 mg/l) is strongly dependent on time, initial metal concentration, dose of adsorbent and pH value. Silver/quartz nanocomposite ((Ag/Q)NPs)) shows better efficiency than individual silver nanoparticles (AgNPs). This composite removed mercury ions from the aqueous solution with efficiency of 96% at 60 min with 0.5g adsorbent dosage at pH 6. The adsorption process explained well by the pseudo-second-order kinetic model. In conclusion silver/quartz nanocomposite (Ag/Q)NPs)) shows higher removal efficiency for mercury ions from aqueous solutions than individual silver naoparticles (AgNPs) or quartz (Q).
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Affiliation(s)
- Rasha S El-Tawil
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza, 12622, Egypt
| | - Shaimaa T El-Wakeel
- National Research Centre, Water Pollution Research Department, Environmental Research Division, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza, 12622, Egypt
| | - Ashraf E Abdel-Ghany
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza, 12622, Egypt
| | - Hanaa A M Abuzeid
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza, 12622, Egypt
| | - Khaled A Selim
- Central Metallurgical Research & Development Institute, Minerals Technology Department, CMRDI, Cairo, Egypt
| | - Ahmed M Hashem
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza, 12622, Egypt
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10
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Hashem AM, Abdel-Ghany AE, Scheuermann M, Indris S, Ehrenberg H, Mauger A, Julien CM. Doped Nanoscale NMC333 as Cathode Materials for Li-Ion Batteries. Materials (Basel) 2019; 12:ma12182899. [PMID: 31500335 PMCID: PMC6766276 DOI: 10.3390/ma12182899] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/04/2019] [Accepted: 09/05/2019] [Indexed: 11/24/2022]
Abstract
A series of Li(Ni1/3Mn1/3Co1/3)1−xMxO2 (M = Al, Mg, Zn, and Fe, x = 0.06) was prepared via sol-gel method assisted by ethylene diamine tetra acetic acid as a chelating agent. A typical hexagonal α-NaFeO2 structure (R-3m space group) was observed for parent and doped samples as revealed by X-ray diffraction patterns. For all samples, hexagonally shaped nanoparticles were observed by scanning electron microscopy and transmission electron microscopy. The local structure was characterized by infrared, Raman, and Mössbauer spectroscopy and 7Li nuclear magnetic resonance (Li-NMR). Cyclic voltammetry and galvanostatic charge-discharge tests showed that Mg and Al doping improved the electrochemical performance of LiNi1/3Mn1/3Co1/3O2 in terms of specific capacities and cyclability. In addition, while Al doping increases the initial capacity, Mg doping is the best choice as it improves cyclability for reasons discussed in this work.
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Affiliation(s)
- Ahmed M. Hashem
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza 12622, Egypt; (A.M.H.); (A.E.A.-G.)
- Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), P.O. Box 3640, 76021 Karlsruhe, Germany; (M.S.); (S.I.); (H.E.)
| | - Ashraf E. Abdel-Ghany
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza 12622, Egypt; (A.M.H.); (A.E.A.-G.)
| | - Marco Scheuermann
- Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), P.O. Box 3640, 76021 Karlsruhe, Germany; (M.S.); (S.I.); (H.E.)
| | - Sylvio Indris
- Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), P.O. Box 3640, 76021 Karlsruhe, Germany; (M.S.); (S.I.); (H.E.)
| | - Helmut Ehrenberg
- Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), P.O. Box 3640, 76021 Karlsruhe, Germany; (M.S.); (S.I.); (H.E.)
| | - Alain Mauger
- Institut de Minéralogie, Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, Campus Pierre et Marie Curie, UMR 7590, 4 place Jussieu, 75252 Paris, France;
| | - Christian M. Julien
- Institut de Minéralogie, Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, Campus Pierre et Marie Curie, UMR 7590, 4 place Jussieu, 75252 Paris, France;
- Correspondence:
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11
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Hashem AM, Abbas SM, Hou X, Eid AE, Abdel-Ghany AE. Facile one step synthesis method of spinel LiMn 2O 4 cathode material for lithium batteries. Heliyon 2019; 5:e02027. [PMID: 31360785 PMCID: PMC6639712 DOI: 10.1016/j.heliyon.2019.e02027] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 02/10/2019] [Revised: 05/20/2019] [Accepted: 06/28/2019] [Indexed: 11/29/2022] Open
Abstract
This study succeeded to prepare three pure phases of Mn2O3, Mn3O4 beside one of the best cathode materials, spinel LiMn2O4. LiMn2O4 with high phase purity and crystallinity was synthesized by a facile, cost effective and one step synthesis method. The structure and morphology of the powders were studied in detail by means of X-ray diffraction (XRD), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM) and surface area. The X-ray diffraction shows that the post-annealing process reveals the formation of pure crystalline spinel LiMn2O4 with small particle size and lower lattice strain. The thermogravimetric analysis threw the light on the role of the evaporation technique in producing LiMn2O4 by following the different phases on the thermal performance of the precursor. The morphological characterization shows the clear appearance of the octahedral particles of LiMn2O4 calcined at high temperature with microporous nanosized structure. Electrochemical testing of the as prepared spinel at 900 °C showed promising results in terms of high initial capacity and good cycle stability. The as prepared spinel sample shows also good rate performance.
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Affiliation(s)
- Ahmed M Hashem
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza 12622, Egypt.,Helmholtz-Institute Münster, IEK-12, Forschungszentrum Jülich, GmbH, Münster, Germany
| | - Somia M Abbas
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza 12622, Egypt
| | - Xu Hou
- Helmholtz-Institute Münster, IEK-12, Forschungszentrum Jülich, GmbH, Münster, Germany
| | - Ali E Eid
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza 12622, Egypt
| | - Ashraf E Abdel-Ghany
- National Research Centre, Inorganic Chemistry Department, 33 El Bohouth St., (former El Tahrir St.), Dokki-Giza 12622, Egypt
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12
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Daniels SJ, Leeming DJ, Eslam M, Hashem AM, Nielsen MJ, Krag A, Karsdal MA, Grove JI, Neil Guha I, Kawaguchi T, Torimura T, McLeod D, Akiba J, Kaye P, de Boer B, Aithal GP, Adams LA, George J. ADAPT: An Algorithm Incorporating PRO-C3 Accurately Identifies Patients With NAFLD and Advanced Fibrosis. Hepatology 2019; 69:1075-1086. [PMID: 30014517 DOI: 10.1002/hep.30163] [Citation(s) in RCA: 148] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 07/03/2018] [Indexed: 12/14/2022]
Abstract
Given the high global prevalence of nonalcoholic fatty liver disease (NAFLD), the need for relevant noninvasive biomarkers and algorithms to accurately stage disease severity is a critical unmet medical need. Identifying those with advanced fibrosis (≥ F3) is the most crucial, as these individuals have the greatest risk of adverse, long-term, liver-related outcomes. We aimed to investigate the role of PRO-C3 (a marker of type III collagen formation) as a biomarker for advanced fibrosis in NAFLD. We measured PRO-C3 by enzyme-linked immunosorbent assay in two large independent cohorts with extensive clinical phenotyping and liver biopsy: 150 in the derivation and 281 in the validation cohort. A PRO-C3-based fibrosis algorithm that included age, presence of diabetes, PRO-C3, and platelet count (ADAPT) was developed. PRO-C3 increased with fibrosis stage (Rho 0.50; P < 0.0001) and was independently associated with advanced fibrosis (odds ratio = 1.05; 95% confidence interval [CI] 1.02-1.08; P = 0.003). ADAPT showed areas under the receiver operating characteristics curve of 0.86 (95% CI 0.79-0.91) in the derivation and 0.87 in the validation cohort (95% CI 0.83-0.91) for advanced fibrosis. This was superior to the existing fibrosis scores, aspartate aminotransferase to platelet ratio index (APRI), FIB-4, and NAFLD fibrosis score (NFS) in most comparisons. Conclusion: PRO-C3 is an independent predictor of fibrosis stage in NAFLD. A PRO-C3-based score (ADAPT) accurately identifies patients with NAFLD and advanced fibrosis and is superior to APRI, FIB-4, and NFS.
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Affiliation(s)
- Samuel J Daniels
- Nordic Bioscience Biomarkers and Research A/S, Herlev, Denmark.,Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Diana J Leeming
- Nordic Bioscience Biomarkers and Research A/S, Herlev, Denmark
| | - Mohammed Eslam
- Storr Liver Centre, Westmead Institute for Medical Research, University of Sydney and Westmead Hospital, Westmead, Australia
| | - Ahmed M Hashem
- Department of Systems and Biomedical Engineering, Faculty of Engineering, Minia University, Minia, Egypt
| | - Mette J Nielsen
- Nordic Bioscience Biomarkers and Research A/S, Herlev, Denmark
| | - Aleksander Krag
- Institute of Clinical Research, University of Southern Denmark, Odense, Denmark.,Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark
| | | | - Jane I Grove
- Nottingham Digestive Diseases Centre, University of Nottingham, Nottingham, United Kingdom.,NIHR Nottingham Biomedical Research Centre at the Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom.,Medical Research Council (MRC) Nottingham Molecular Pathology Node, University of Nottingham, Nottingham, United Kingdom
| | - Indra Neil Guha
- Nottingham Digestive Diseases Centre, University of Nottingham, Nottingham, United Kingdom.,NIHR Nottingham Biomedical Research Centre at the Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom.,Medical Research Council (MRC) Nottingham Molecular Pathology Node, University of Nottingham, Nottingham, United Kingdom
| | - Takumi Kawaguchi
- Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Takuji Torimura
- Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Duncan McLeod
- Department of Anatomical Pathology, Institute of Clinical Pathology and Medical Research (ICPMR), Westmead Hospital, Sydney, Australia
| | - Jun Akiba
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - Philip Kaye
- Nottingham Digestive Diseases Centre, University of Nottingham, Nottingham, United Kingdom.,Medical Research Council (MRC) Nottingham Molecular Pathology Node, University of Nottingham, Nottingham, United Kingdom
| | - Bastiaan de Boer
- Department of Anatomical Pathology, PathWest, Fiona Stanley Hospital, Murdoch, Australia
| | - Guruprasad P Aithal
- Nottingham Digestive Diseases Centre, University of Nottingham, Nottingham, United Kingdom.,NIHR Nottingham Biomedical Research Centre at the Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom.,Medical Research Council (MRC) Nottingham Molecular Pathology Node, University of Nottingham, Nottingham, United Kingdom
| | - Leon A Adams
- Medical School, University of Western Australia, Nedlands, Australia
| | - Jacob George
- Storr Liver Centre, Westmead Institute for Medical Research, University of Sydney and Westmead Hospital, Westmead, Australia
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13
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Hashem AM, Knackstedt RW, Bernard S, Hendrickson M, McBride JM, Djohan R. Variations in the origins and absence of the common digital arteries of the hand: a cadaveric study. J Hand Surg Eur Vol 2018; 43:1054-1058. [PMID: 29558847 DOI: 10.1177/1753193418764289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We studied anomalies of the common digital arteries by dissecting 33 fresh cadaver hands under magnification. In the majority of the dissected hands (25 hands), common digital arteries took off from the superficial palmar arch and ran superficial and parallel to the flexor tendons. Variations were found in eight out of 33 hands. In four hands the common digital artery to the second web space was replaced by an atypical vessel, originating from the deep palmar arch, that crossed posterior to the index flexor tendons proximal to the A1 pulley. In eight hands, the common digital artery to the fourth web space was replaced by an atypical deeper vessel, originating from the superficial palmar arch and crossing posterior to the little finger flexors. No nerve anomalies were identified. Unrecognized, these atypical arteries to the second and/or fourth web spaces could lead to vascular complications during surgery, especially pollicization.
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Affiliation(s)
- Ahmed M Hashem
- Cairo University, Cairo, Egypt.,Cleveland Clinic, OH, USA
| | | | - Steven Bernard
- Cairo University, Cairo, Egypt.,Cleveland Clinic, OH, USA
| | | | | | - Risal Djohan
- Cairo University, Cairo, Egypt.,Cleveland Clinic, OH, USA
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14
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Knackstedt R, Hashem AM, Schwarz GS. Nipple sparing mastectomy and microsurgical breast reconstruction: An approach for success. J Plast Reconstr Aesthet Surg 2017; 71:609-611. [PMID: 28988598 DOI: 10.1016/j.bjps.2017.08.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 08/03/2017] [Accepted: 08/26/2017] [Indexed: 11/19/2022]
Affiliation(s)
| | - Ahmed M Hashem
- Department of Plastic and Reconstructive Surgery, Cairo University, Cairo, Egypt
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15
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Hashem AM, Sohrab SS, El-Kafrawy SA, El-Ela SA, Abd-Alla AMM, Farraj SA, Othman NA, Hassan AM, El-Daly MM, Charrel RN, Madani TA, Azhar EI. First complete genome sequence of circulating dengue virus serotype 3 in Jeddah, Saudi Arabia. New Microbes New Infect 2017; 21:9-11. [PMID: 29158909 PMCID: PMC5678886 DOI: 10.1016/j.nmni.2017.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 08/07/2017] [Revised: 09/11/2017] [Accepted: 09/19/2017] [Indexed: 11/17/2022] Open
Abstract
Here we report the first full-length genome sequence of dengue virus serotype 3 (DENV-3) from a strain isolated from a patient in Jeddah, Saudi Arabia, in 2014. The genome consists of 10 635 bp and shows close similarity to circulating genotype III isolates from Singapore, suggesting possible importation, most probably during religious pilgrimages to Saudi Arabia.
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Affiliation(s)
- A M Hashem
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia.,Department of Medical Microbiology and Parasitology, Faculty of Medicine, Jeddah, Saudi Arabia
| | - S S Sohrab
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia
| | - S A El-Kafrawy
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia
| | - S A El-Ela
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia
| | - A M M Abd-Alla
- Insect Pest Control Laboratory, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, Vienna, Austria.,Pests and Plant Protection Department, National Research Center, Cairo, Egypt
| | - S A Farraj
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia
| | - N A Othman
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia
| | - A M Hassan
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia
| | - M M El-Daly
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia
| | - R N Charrel
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia.,UMR 'Emergence des Pathologies Virales', Fondation IHU Méditerranée Infection, APHM Public Hospitals of Marseille, Marseille, France
| | - T A Madani
- Department of Medicine, Faculty of Medicine, Jeddah, Saudi Arabia
| | - E I Azhar
- Special Infectious Agent Unit, King Fahd Medical Research Center, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
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16
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Hashem AM, Waltzman JT, D'Souza GF, Cakmakoglu C, Tadisina KK, Kenkel JM, Zins JE. Resident and Program Director Perceptions of Aesthetic Training in Plastic Surgery Residency: An Update. Aesthet Surg J 2017; 37:837-846. [PMID: 28333253 DOI: 10.1093/asj/sjw275] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [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: 11/13/2022] Open
Abstract
Background This is the third survey exploring the quality of cosmetic training in plastic surgery residency. We focused on determining: (1) the applied modalities and extent of resident exposure; and (2) resident confidence in performing variable cosmetic procedures. Objectives To analyze trends in resident exposure and confidence in aesthetic plastic surgery procedures from the standpoint of program directors (PDs) and residents. Methods The survey was developed and e-mailed to 424 residents enrolled in the ASAPS Residents Program and 95 PDs. Both independent and integrated programs were included. The questions were posed in a five-point ranking format. Univariate statistical analysis was used to examine all aspects. The results were analyzed in relation to our previous surveys in 2008 and 2011. Results Thirty-three PDs (34.7%) and 224 (52.8%) residents responded. Residents felt most confident with abdominoplasty, breast reduction, and augmentation-mammaplasty. Facial aesthetic procedures, especially rhinoplasty and facelift, were perceived as "challenging." The three most preferred modalities of aesthetic education were, in descending order, residents' clinic, staff cosmetic patients, and cadaver dissections. Both residents and PDs felt a need for more training especially in facial procedures. Only 31.5% of residents who planned to focus on cosmetic surgery felt ideally prepared integrating cosmetic surgery into their practice (compared to 50% in previous surveys). Conclusions Despite improvements observed from 2008 to 2011 published surveys, there are still challenges to be met especially in facial cosmetic procedures. It is suggested that resident clinics and cadaver courses be universally adopted by all training programs.
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Affiliation(s)
- Ahmed M Hashem
- Cairo University, Cairo, Egypt.Aesthetic Surgery Journal (ASJ). ; ASJ
| | | | - Gehaan F D'Souza
- Department of Plastic Surgery, Cleveland Clinic Foundation, Cleveland, OH
| | - Cagri Cakmakoglu
- Dr Lufti Kirdar Training and Research Hospital, Istanbul, Turkey
| | | | - Jeffrey M Kenkel
- Department of Plastic Surgery, University of Texas Southwestern Medical Center, Dallas, TX
| | - James E Zins
- Department of Plastic Surgery, Cleveland Clinic Foundation, Cleveland, OH
- Aesthetic Surgery Journal
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17
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Couto RA, Lamaris GA, Baker TA, Hashem AM, Tadisina K, Durand P, Rueda S, Orra S, Zins JE. Age as a Risk Factor in Abdominoplasty. Aesthet Surg J 2017; 37:550-556. [PMID: 28333178 DOI: 10.1093/asj/sjw227] [Citation(s) in RCA: 9] [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] [Indexed: 11/15/2022] Open
Abstract
Background Recent studies reviewing large patient databases suggested that age may be an independent risk factor for abdominoplasty. However, these investigations by design considered only short-term major complications. Objectives The purpose of this investigation was: (1) to compare the safety of abdominoplasty in an elderly and younger patient population; (2) to determine the complication rates across all spectrums: major, minor, local, and systemic; and (3) to evaluate complications occurring both short and long term. Methods Abdominoplasty procedures performed from 2010 to 2015 were retrospectively reviewed. Subjects were divided into two groups: ≤59 years old and ≥60 years old. Major, minor, local, and systemic complications were analyzed. Patient demographics, comorbidities, perioperative details, adjunctive procedures were also assessed. Results A total of 129 patients were included in the study: 43 in the older and 86 in the younger age group. The median age of The elderly and young groups was 65.0 and 41.5 years, respectively (P < .001). No statistically significant differences in major, minor, local, or systemic complications were found when both age groups were compared. Major local, major systemic, minor local, and minor systemic in the elderly were 6.9%, 2.3%, 18.6%, and 2.3%, while in the younger patients were 9.3%, 4.7%, 10.5%, and 0.0%, respectively (P > .05). Median follow-up time of the elderly (4.0 months) was no different than the younger (5.0 months) patients (P > .07). Median procedure time in the elderly (4.5 hours) was no different than the younger group (5.0 hours) (P = .4). The elderly exhibited a greater American Society of Anesthesiologist score, median body mass index (28.7 vs 25.1 kg/m2), and number of comorbidities (2.7 vs 0.9) (P < .001). Conclusions There was no significant difference in either major or minor complications between the two groups. This suggests that with proper patient selection, abdominoplasty can be safely performed in the older age patient population. Level of Evidence 2.
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Affiliation(s)
- Rafael A. Couto
- From the Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH. Dr Zins is the Facial Surgery Section Editor for Aesthetic Surgery Journal
| | - Gregory A. Lamaris
- From the Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH. Dr Zins is the Facial Surgery Section Editor for Aesthetic Surgery Journal
| | - Todd A. Baker
- From the Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH. Dr Zins is the Facial Surgery Section Editor for Aesthetic Surgery Journal
| | - Ahmed M. Hashem
- From the Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH. Dr Zins is the Facial Surgery Section Editor for Aesthetic Surgery Journal
| | - Kashyap Tadisina
- From the Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH. Dr Zins is the Facial Surgery Section Editor for Aesthetic Surgery Journal
| | - Paul Durand
- From the Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH. Dr Zins is the Facial Surgery Section Editor for Aesthetic Surgery Journal
| | - Steven Rueda
- From the Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH. Dr Zins is the Facial Surgery Section Editor for Aesthetic Surgery Journal
| | - Susan Orra
- From the Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH. Dr Zins is the Facial Surgery Section Editor for Aesthetic Surgery Journal
| | - James E. Zins
- From the Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH. Dr Zins is the Facial Surgery Section Editor for Aesthetic Surgery Journal
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Frautschi RS, Hashem AM, Halasa B, Cakmakoglu C, Zins JE. Current Evidence for Clinical Efficacy of Platelet Rich Plasma in Aesthetic Surgery: A Systematic Review. Aesthet Surg J 2017; 37:353-362. [PMID: 28207031 DOI: 10.1093/asj/sjw178] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Background Platelet rich plasma (PRP) has attracted attention in a number of surgical fields due to a wide variety of potential clinical benefits. Yet PRP has not gained wide popularity in aesthetic surgery as a result of uncertainty surrounding objective clinical evidence. Objectives We aim to describe the current applications, define preparation and activation, explore effectiveness, and propose a classification system to facilitate comparisons across studies. Methods A comprehensive review of the literature regarding the use of platelet rich plasma in aesthetic surgery was performed. Data gathered included: PRP application, study type, subject number, centrifugation, anticoagulation, activation, PRP composition, and outcomes. Results Thirty-eight reports were identified. Applications included injection into aging skin (29%), scalp alopecia (26%), lipofilling (21%), fractional laser (13%), and facial surgery (11%). The majority of studies (53%) were case series without controls. Leucocytes were sparsely defined (32%). The concentration of injected and/or baseline platelets was rarely clarified (18%). The mechanism of activation was described in 27 studies (71%), while anticoagulation was uncommonly elucidated (47%). While most studies (95%) claim effectiveness, objective measures were only utilized in 17 studies (47%). Conclusions Current studies produce context-dependent results with a lack of consistent reporting of PRP preparation, composition, and activation in aesthetic applications, making meaningful meta-analysis unrealistic. Thus the method of PRP preparation warrants increased attention. We recommend a set of descriptors, FIT PAAW (described below), to produce scientifically grounded conclusions, facilitating a clearer understanding of the situations in which PRP is effective. Level of Evidence 4
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Affiliation(s)
| | - Ahmed M Hashem
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - Brianna Halasa
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | | | - James E Zins
- Facial Surgery Section Editor for Aesthetic Surgery Journal
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El-Wakeel ST, El-Tawil RS, Abuzeid HA, Abdel-Ghany AE, Hashem AM. Synthesis and structural properties of MnO2 as adsorbent for the removal of lead (Pb2+) from aqueous solution. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.01.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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20
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Hashem AM, Hoffman GS, Gastman B, Bernard S, Djohan R, Hendrickson M, Schwarz G, Doumit G, Gharb BB, Rampazzo A, Zins JE, Siemionow M, Papay F. Establishing the Feasibility of Face Transplantation in Granulomatosis With Polyangiitis. Am J Transplant 2016; 16:2213-2223. [PMID: 26876068 DOI: 10.1111/ajt.13751] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 10/14/2015] [Revised: 01/21/2016] [Accepted: 02/06/2016] [Indexed: 01/26/2023]
Abstract
Granulomatosis with polyangiitis (GPA; formerly Wegener's granulomatosis) is a rare vasculitis that commonly starts in the craniofacial region. We report a case that was masked by prior facial trauma and associated with pyoderma gangrenosum (PG). Disease progression and aggressive debridements led to severe facial tissue loss. The decision to perform a face transplant was controversial because of the risk of disease relapse on the facial allograft. We reviewed renal transplant outcomes in GPA for possible relevance. A PubMed search retrieved 29 studies. Patient and graft survival, relapse, morbidity, mortality, rejection and immunosuppression were assessed. Ten-year patient survival and graft survival were 84.4% and 72.6%, respectively. GPA relapse occurred in 31.5%, and upper airway/ocular relapse occurred in 17.8% (resolved in 76.9%). Mortality was 12.3%. Acute and chronic rejection rates were 14.9% and 6.8%, respectively. Traditional posttransplant immunosuppression was effective. Our review suggests that GPA renal transplant outcomes are comparable to general renal transplant cohorts. Furthermore, transplanted GPA patients exhibit lower disease relapse secondary to lifelong immunosuppression. This supported our decision to perform a face transplant in this patient, which has been successful up to the present time (1-year posttransplantation). Untreated GPA and PG are potential causes of worse surgical outcomes in the craniofacial region.
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Affiliation(s)
- A M Hashem
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH.,Department of Plastic Surgery, Cairo University, Cairo, Egypt
| | - G S Hoffman
- Department of Rheumatology, Cleveland Clinic, Cleveland, OH
| | - B Gastman
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - S Bernard
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - R Djohan
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - M Hendrickson
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - G Schwarz
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - G Doumit
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - B B Gharb
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - A Rampazzo
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - J E Zins
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - M Siemionow
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
| | - F Papay
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH
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21
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Zins JE, Hashem AM. Commentary on: SMAS Fusion Zones Determine the Subfascial and Subcutaneous Anatomy of the Human Face: Fascial Spaces, Fat Compartments, and Models of Facial Aging. Aesthet Surg J 2016; 36:527-8. [PMID: 27049008 DOI: 10.1093/asj/sjv236] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/26/2015] [Indexed: 11/12/2022] Open
Affiliation(s)
- James E Zins
- From the Department of Plastic Surgery, Cleveland Clinic Foundation, Cleveland, OH. Dr Zins is Facial Surgery Section Editor for Aesthetic Surgery Journal
| | - Ahmed M Hashem
- From the Department of Plastic Surgery, Cleveland Clinic Foundation, Cleveland, OH. Dr Zins is Facial Surgery Section Editor for Aesthetic Surgery Journal
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22
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Bassiri Gharb B, Tadisina KK, Rampazzo A, Hashem AM, Elbey H, Kwiecien GJ, Doumit G, Drake RL, Papay F. Microsurgical Anatomy of the Terminal Hypoglossal Nerve Relevant for Neurostimulation in Obstructive Sleep Apnea. Neuromodulation 2015; 18:721-8. [DOI: 10.1111/ner.12347] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 08/03/2015] [Accepted: 08/05/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Bahar Bassiri Gharb
- Department of Plastic Surgery; Institute of Dermatology and Plastic Surgery; Cleveland Clinic; Cleveland OH USA
| | - Kashyap Komarraju Tadisina
- Department of Plastic Surgery; Institute of Dermatology and Plastic Surgery; Cleveland Clinic; Cleveland OH USA
| | - Antonio Rampazzo
- Department of Plastic Surgery; Institute of Dermatology and Plastic Surgery; Cleveland Clinic; Cleveland OH USA
| | - Ahmed M. Hashem
- Department of Plastic Surgery; Institute of Dermatology and Plastic Surgery; Cleveland Clinic; Cleveland OH USA
| | - Huseyin Elbey
- Department of Plastic Surgery; Institute of Dermatology and Plastic Surgery; Cleveland Clinic; Cleveland OH USA
| | - Grzegorz J. Kwiecien
- Department of Plastic Surgery; Institute of Dermatology and Plastic Surgery; Cleveland Clinic; Cleveland OH USA
| | - Gaby Doumit
- Department of Plastic Surgery; Institute of Dermatology and Plastic Surgery; Cleveland Clinic; Cleveland OH USA
| | | | - Francis Papay
- Department of Plastic Surgery; Institute of Dermatology and Plastic Surgery; Cleveland Clinic; Cleveland OH USA
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Nawwar MA, Youb NA, El-Raey MA, Zaghloul SS, Hashem AM, Mostafa ES, Eldahshan O, Werner V, Becker A, Haertel B, Lindequist U, Linscheid MW. Polyphenols in Ammania auriculata: structures, antioxidative activity and cytotoxicity. Pharmazie 2014. [PMID: 25985585 DOI: 10.1691/ph.2014.4635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Chemical and biological investigations of the extract of Ammania auriculata (Lytheraceae) resulted in the identification of eight polyphenols (1 - 8) for the first time from this plant, including the gallotannin, 2,3,6-tri-O-galloyl-(α,β)-4C1-glucopyranose (8), for which 1D and 2D-NMR spectra were recorded and assigned for the first time. The structures of all isolates (1 - 8) were elucidated by conventional methods, spectroscopic analysis, including 1D and 2D NMR, and by HR-ESIMS as well. All of the isolated compounds were evaluated for their antioxidant activities, determined by the DPPH and ORAC methods and for their cytotoxicity against the keratinocyte cell line HaCaT using the neutral red assay (NRU) and cell cycle analysis. Compounds 1, 3, 4, 5, and 6 significantly inhibited reactive oxygen species production with ED50 values between 3.22 and 9.79 μg/ml. Compounds 1, 3, 4, and 5 showed cytotoxic activity against HaCaT cells with IC50 values between 30.7 and 84.1 μg/ml. The new galloyl glucose (8) was found not cytotoxic. Ellagitannins, 2,3-hexahydroxy-((α/β)-glucopyranose (1) and 1 -0-galloyl 2,3-hexahydroxy-(α)-glucopyranose (5) possess remarkable antioxidative and comparably weak cytotoxic activity.
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Abstract
BACKGROUND Intraperitoneal fat, also known as visceral adipose tissue (VAT), poses significant metabolic risks. Reduction of this fat is functionally and aesthetically desirable. Since surgical reduction has serious risks, a noninvasive method for reduction of this fat would have important clinical benefits. OBJECTIVE The authors evaluate the reduction in VAT in an animal model using injection lipolysis. METHODS Phosphatidylcholine was injected in half of the omentum of 16 dogs (weight 30-40 kg) by surgical laparotomy. The dogs' vital signs were followed postoperatively. A second laparotomy was performed at 2 weeks (n = 10), 4 weeks (n = 4), or 6 weeks (n = 2). Reduction of fat in the injected side was assessed by comparing with the control side. Specimens of the injected and the control sides were examined microscopically. Intraperitoneal cultures were also obtained. RESULTS There was a major reduction in the amount of fat in all 16 dogs. No intraperitoneal abscesses, collections, or adhesions developed, and there was no injury to any intra-abdominal organs. Microscopic examination showed significant fat loss and lysis of fat cells with cellular infiltrate formed of predominantly macrophages, with fibrosis developing in the 6-week specimens. No bacterial or fungal growth was observed on the cultures. The dogs' vital signs showed no significant variation from the preoperative baseline. CONCLUSIONS Injection lipolysis is effective and safe in reducing VAT in dogs. Further studies are needed to prove its efficacy and safety in humans and refine its indications and method of injection.
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Hashem AM, Rasmy MEM, Wahba KM, Shaker OG. Single stage and multistage classification models for the prediction of liver fibrosis degree in patients with chronic hepatitis C infection. Comput Methods Programs Biomed 2012; 105:194-209. [PMID: 22070853 DOI: 10.1016/j.cmpb.2011.10.005] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 10/14/2011] [Accepted: 10/14/2011] [Indexed: 05/31/2023]
Abstract
Predicting significant fibrosis or cirrhosis in patients with hepatitis C virus has persistently preoccupied the research agenda of many specialized research centers. Many studies have been conducted to evaluate the use of readily available laboratory tests to predict significant fibrosis or cirrhosis with the purpose to substantially reduce the number of biopsies performed. Although many of them reported significant predictive values of several serum markers for the diagnosis of cirrhosis, none of these diagnostic techniques was successful in accurately predicting early stages of liver fibrosis. Therefore, in this study a single stage classification model and a multistage stepwise classification model based on Neural Network, Decision Tree, Logistic Regression, and Nearest Neighborhood clustering, have been developed to predict individual's liver fibrosis degree. Results showed that the area under the receiver operator curve (AUROC) values of the multistage model ranged from 0.874 to 0.974 which is a higher range than what is reported in current researches with similar conditions.
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Affiliation(s)
- Ahmed M Hashem
- Department of Systems and Biomedical Engineering, Faculty of Engineering, Minia University, Minia, Egypt.
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Wasfi R, El-Rahman OAA, Mansour LE, Hanora AS, Hashem AM, Ashour MS. Antimicrobial activities against biofilm formed by Proteus mirabilis isolates from wound and urinary tract infections. Indian J Med Microbiol 2012; 30:76-80. [DOI: 10.4103/0255-0857.93044] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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27
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Galal SA, Hegab KH, Hashem AM, Youssef NS. Synthesis and antitumor activity of novel benzimidazole-5-carboxylic acid derivatives and their transition metal complexes as topoisomerease II inhibitors. Eur J Med Chem 2010; 45:5685-91. [PMID: 20884089 DOI: 10.1016/j.ejmech.2010.09.023] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Revised: 09/03/2010] [Accepted: 09/08/2010] [Indexed: 02/06/2023]
Abstract
N-aminomethyl-1H-benzimidazole-5-carboxylic acid derivatives 2-5 and the ligand, 1-(5 (or 6-)-carboxy-1H-benzimidazol-2-ylmethyl)pyridinium chloride (6; H2L1) have been synthesized. New benzimidazole complexes 7-9 of the ligand 6; H2L1 with Cu2+, Co2 and Zn2+ were prepared. The growth-inhibitory against a panel of 21 human cancer cell lines of the synthesized compounds 1-9 was studied. Compounds 6-9 showed potent growth-inhibitory activity against the studied cell lines. The correlation coefficients according to COMPARE analysis of the National Cancer Institute screening protocol showed that the pattern of the growth-inhibitory effect of the compounds 6-9 was similar to that of etoposide and doxorubicin but different from that of SN-38 and cisplatin. The topoisomerase II inhibitory activity of the tested compounds 6-9 was studied. Compounds 6 and 8 inhibited topoisomerase II activity at 10 times lower concentration than etoposide in relaxation assay.
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Affiliation(s)
- Shadia A Galal
- Division of Pharmaceutical and Drug Industries, Department of Chemistry of Natural and Microbial Products, National Research Center, Cairo 12311, Egypt.
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Y. Ahmed H, H. El Shikh H, A. Ghoneimy E, M. Ragab A, A. Saad A, M. Hashem A, M. El Sayed R, Eldin M. El Shikh M. Fungal Secondary Metabolites: A Promising Source of Antineoplastic Drugs. CCTR 2010. [DOI: 10.2174/157339410791698223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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29
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Hashem AM, Ismail AM, El-Refai MA, Abdel-Fattah AF. Production and properties of beta-mannanase by free and immobilized cells of Aspergillus oryzae NRRL 3488. Cytobios 2002; 105:115-30. [PMID: 11393772] [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: 02/20/2023]
Abstract
Seven fungi were tested for production of mannanases. The highest mannanase activities were produced by Aspergillus oryzae NRRL 3488 after 7 days in static cultures. Mannanases were induced by gum locust bean (1.0%). The highest mannanase activity was produced when a mixture of peptone, urea and ammonium sulphate was used as nitrogen source. Zn2+ or Co2+ favoured enzyme production. The immobilized cells on Ca-alginate and agar were able to produce beta-mannanase for four runs with a slight decrease in the activity. The optimum temperature for enzyme reaction was 50-55 degrees C at pH 6.0. In the absence of substrate the enzyme was thermostable retaining 75% activity for 1 h at 50 degrees C, and 68% activity for 1 h at 60 degrees C.
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Affiliation(s)
- A M Hashem
- Department of Natural and Microbial Products Chemistry, National Research Centre, Dokki, Cairo, Egypt
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