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Parikh TB, Aziz M, Mackoff SP, Aisenberg GM. HEART and TIMI Scores Predict Severe Coronary Atherosclerosis in Patients With End-Stage Renal Disease. Cureus 2023; 15:e40408. [PMID: 37456397 PMCID: PMC10348035 DOI: 10.7759/cureus.40408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2023] [Indexed: 07/18/2023] Open
Abstract
Objectives History, EKG, age, risk factors, and troponin (HEART) and thrombolysis in myocardial infarction (TIMI) risk calculators have been validated to predict the risk of subsequent acute coronary syndromes and in some studies, severe coronary atherosclerosis in patients with a concerning clinical history. Their performance in patients with end-stage renal disease (ESRD), a population with a high pretest probability for the condition, is unknown. We aimed to determine whether HEART and TIMI scores can predict severe coronary atherosclerosis in patients with end-stage renal disease (ESRD). Methods A single-center retrospective cohort of admitted patients aged 18 years or older with ESRD on dialysis who underwent coronary angiography during admission (November 2010 to December 2017) was retrospectively reviewed. The outcome of coronary angiography was compared with the calculated HEART and TIMI scores at the time of presentation. Receiver operating characteristics and logistic regression models were used to determine optimal score cutoffs, score usefulness, and associations between outcomes, scores, and patient characteristics. Results Among 231 patient encounters, the mean HEART and TIMI scores were 6±2 and 3±1 points, respectively. Patients with diabetes mellitus, those 65 years old and older, and those reported to have angina pectoris were more likely to show severe coronary artery disease (CAD) lesions. Optimal score cutoffs for determining severe coronary lesions were between six and seven (area under the curve (AUC)=0.754, confidence interval (CI): 0.682-0.826) and between three and four (AUC=0.716, CI: 0.640-0.792) for the HEART and TIMI scores, respectively. Conclusion Similar to the general population, HEART and TIMI scores can predict severe coronary atherosclerosis in the complex ESRD population.
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Affiliation(s)
- Trishna B Parikh
- Internal Medicine, University of Texas, John P and Kathrine G McGovern School of Medicine, Houston, USA
| | - Moez Aziz
- Internal Medicine, University of Texas, John P and Kathrine G McGovern School of Medicine, Houston, USA
| | - Samuel P Mackoff
- Internal Medicine, University of Texas, John P and Kathrine G McGovern School of Medicine, Houston, USA
| | - Gabriel M Aisenberg
- Internal Medicine, University of Texas, John P and Kathrine G McGovern School of Medicine, Houston, USA
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Istavara A, Ratiko R, Aziz M, Aisyah A, Nasruddin N. Optimization of heat removal and radiation protection of dry cask storage for MTR spent nuclear fuel. ANN NUCL ENERGY 2023. [DOI: 10.1016/j.anucene.2023.109749] [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: 02/19/2023]
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3
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Arshad M, Ruby T, Shahzad MI, Alvi Q, Aziz M, Sahar S, Amjad R, Waheed A, Muhammad SG, Shaheen A, Ahmed S. An antimicrobial activity of oil extracted from Saara hardwickii. BRAZ J BIOL 2022; 84:e253508. [PMID: 35195177 DOI: 10.1590/1519-6984.253508] [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] [Received: 06/22/2021] [Accepted: 10/22/2021] [Indexed: 11/22/2022] Open
Abstract
Present research work represents antiviral and antibacterial value of body fat of Saara hardwickii commonly called as spiny tailed lizard. Oil was extracted from body fats located in the ventral region of this animal using hydrocarbons e.g., n-hexane, methanol, butanol and ethyl acetate as a solvent. The antibacterial activity of lizard oil was tested against standard as well as multi-resistant lines ofEscherichia coli, Styphalococcus aureus, Pseudomonas aeruginosa and Proteus vulgaris alone and with antibiotic ampicillin. For antibacterial potential, Ethyl acetate and Butanol solvent extract showed best zone of inhibition (7mm) with P. aeruginosa and S. aureus respectively. For antiviral potential, Butanol and Methanol extract showed best HA (Hemagglutination) titer of 04 with NDV and IBV viral strain respectively. It is concluded that lizard oil has antimicrobial potential against different pathogens strains (virus, bacteria).
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Affiliation(s)
- M Arshad
- Government College University Fasialabad Sahiwal campus, Sahiwal, Pakistan
| | - T Ruby
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - M I Shahzad
- The Islamia University of Bahawalpur,Department of Biochemistry,Institute of Biochemistry, Biotechnology and Bioinformatics, Bahawalpur, Pakistan
| | - Q Alvi
- Taylor's University, Faculty of Health and Medical Sciences, School of Biosciences, Kualalampur, Selangor, Malaysia
| | - M Aziz
- Bahauddin Zakariya University, Department of Microbiology and Genetics, Multan, Pakistan
| | - S Sahar
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - R Amjad
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - A Waheed
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - S G Muhammad
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - A Shaheen
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - S Ahmed
- Bahauddin Zakariya University, Institute of Pure and Applied Biology, Zoology Division, Multan, Pakistan
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Shakir K, Aziz M, Benyamin K. Foam Separation; Part I / Schaumtrennung; Teil I. TENSIDE SURFACT DET 2021. [DOI: 10.1515/tsd-1990-270522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Arif M, Hussain N, Yasmeen A, Naz S, Anwar A, Mushtaq S, Iqbal J, Shaheen A, Aziz M, Bukhari SAH, Shah SH. Exogenous application of bio-stimulant and growth retardant improved the productivity of cotton cultivars under different planting arrangement. BRAZ J BIOL 2021; 82:e238812. [PMID: 34161424 DOI: 10.1590/1519-6984.238812] [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] [Received: 05/24/2020] [Accepted: 12/11/2020] [Indexed: 11/22/2022] Open
Abstract
Optimum planting arrangement is an important attribute for efficient utilization of available resources and to obtain high yield of cotton. Application of plant growth promoter and retardant on cotton in improved planting density are the innovative techniques in the establishment of more productive cotton crop. Therefore, we planned a field study to assess the role of bio-stimulant and growth retardant in the resource utilization efficiency of cotton cultivars planted under variable row spacing at Agronomic Research Area Bahauddin Zakariya University and Usmania Agricultural Farm Shujabad during Kharif 2012. Experimental treatments consisted of cotton genotypes viz. CIM-573 and CIM-598, cultivated under conventional (75 cm), medium (50 cm) and ultra-narrow row spacing (25 cm) with foliar spray of bio-stimulant (moringa leaf extract) and growth retardant (mepiquate chloride), either sole or in combination, keeping distilled water as a control. Exogenously applied MLE alone and MLE + MC significantly enhanced the number of squares, flowers and green bolls per plant leading to higher cotton seed and lint yield of CIM 598 cultivar cultivated under conventional row spacing. While application of MC alone and MLE + MC produced maximum micronaire value, fiber strength and fiber uniformity ratio of CIM 573 cultivar cultivated under conventional row spacing. The results suggested that application of MLE is a possible approach to enhance the cotton productivity and the use of MC to enhance the fiber quality attributes under conventional row spacing.
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Affiliation(s)
- M Arif
- Bahauddin Zakariya University, Multan, Punjab, Pakistan.,Directorate of Land Reclamation, Irrigation Department Punjab, Lahore, Pakistan
| | - N Hussain
- Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - A Yasmeen
- Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - S Naz
- Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - A Anwar
- Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, Punjab, Pakistan
| | - S Mushtaq
- University of Wisconsin, Madison, USA
| | - J Iqbal
- The Ismia University of Bahawalpur, Punjab, Pakistan
| | - A Shaheen
- Govt. Sadiq College Women University Bahawalpur, Punjab, Pakistan
| | - M Aziz
- Barani Agricultural Research Institute, Chakwal, Punjab, Pakistan
| | - S A H Bukhari
- Bahauddin Zakariya University, Multan, Punjab, Pakistan
| | - S H Shah
- Allama Iqbal Open University, Islamabad, Pakistan
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Karadakhy O, Aziz M, Salama H. 560 A Rare Case Report of Cartilaginous Choristoma In Base of Tongue. Br J Surg 2021. [DOI: 10.1093/bjs/znab134.298] [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: 11/14/2022]
Abstract
Abstract
Introduction
Choristomas are rare, benign, tumour-like growths with histologically normal morphology in an ectopic location. Choristomas can constitute of various tissue types including cartilage, bone and muscle. Chondroid tissue choristomas are referred to as cartilaginous choristomas.
Case Presentation:
A 69 year old gentleman presented with three weeks’ history of foreign body sensation in his throat. No other red flag symptoms were present. Fine nasal endoscopy was unremarkable. Magnetic resonance imaging (MRI) scan revealed mild bilateral prominence of the lingual tonsils. Patient underwent Panednoscopy and biopsy. This confirmed the presence of a cartilaginous choristoma in base of tongue.
Discussion:
This is a rare case of cartilaginous choristoma in base of tongue. It was investigated as per potential head and neck cancers. The majority of previous cases in the literature were managed using surgical resection of the lesion. In this particular case, the patient was discussed in multi-disciplinary team (MDT) meeting and managed conservatively due to the benign nature of the lesion and symptoms.
Conclusions
Cartilaginous choristomas are rare benign lesions, which can present similarly to malignant head and neck tumours. Their size and symptoms should be carefully considered before management. There is a role for conservative management in select cases.
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Affiliation(s)
- O Karadakhy
- Nottingham City Hospital, Nottingham, United Kingdom
| | - M Aziz
- Lincoln County Hospital, Lincoln, United Kingdom
| | - H Salama
- Lincoln County Hospital, Lincoln, United Kingdom
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Aziz M, Benamer M, Hany S, Sahib Y. 666 Innovations in ENT Surgery During The COVID-19 Pandemic. Br J Surg 2021. [PMCID: PMC8135846 DOI: 10.1093/bjs/znab134.019] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Introduction Severe acute respiratory syndrome coronavirus 2 (SARS-COV-2), is responsible for the coronavirus disease 2019 (COVID – 19) global pandemic. Similar coronavirus epidemics over the past years affected healthcare workers significantly. Aerosol generating procedures (AGPs) presented a unique risk to ear, nose and throat (ENT) Surgeons. We introduce various methods of reducing risk in ENT AGPs. Recommendations During trachesostomies we advocate the adoption of a specialist checklist based on ENT UK guidelines. We also advise the use of a clear drape to create a clear barrier between the patient and staff. For ear surgery we advise suturing 2 microscope pieces together end-to-end so that a clear drape can sperate the patient from surgeon. During nasal and sinus surgery, we advise attaching a clear drape to the sterile camera drape used in rigid nasal endoscopy to create a barrier between patient and surgeon. Discussion Our recommendations will create an extra barrier between the patient and the rest of healthcare team. This should reduce the risks to theatre staff from AGPs. Conclusions COVID 19 is a serious health issue affecting healthcare workers, especially during AGPs in ENT surgery. We recommend several techniques to reduce risk. These can also be used during future epidemics.
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Affiliation(s)
- M Aziz
- Lincoln county hospital, Lincoln, United Kingdom
| | - M Benamer
- Lincoln county hospital, Lincoln, United Kingdom
| | - S Hany
- Lincoln county hospital, Lincoln, United Kingdom
| | - Y Sahib
- Lincoln county hospital, Lincoln, United Kingdom
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Sahib Y, Aziz M, Benamer M. 711 Atypical Presentation of a Ruptured Thyroid Cyst. Br J Surg 2021. [DOI: 10.1093/bjs/znab134.022] [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]
Abstract
Abstract
Introduction
Thyroid cysts are a common finding with the bulk of cases being benign and approximately only 5% being malignant. The majority of these cysts are managed conservatively in the absence of malignancy or compressive symptoms.
Case
presentation
A middle-aged female patient presented with sudden onset anterior neck bruising but minimal specific symptomatology. On examination, the patient had bruising around the anterior neck and chest wall. CT and MRI scanning of the neck revealed the bruising was attributed to a ruptured thyroid cyst. On follow up, an ultrasound guided fine-needle aspirate revealed the histology to be inflammatory follicular thyroid tissue.
D
iscussion
The case demonstrated a rare presentation, given the lack of trauma in her history nor the presence of more sinister conditions as demonstrated by the fine-needle aspirate. Normally hemorrhage of thyroid cysts are due to trauma or abnormal thyroid vasculature. There are a few previous case reports of similar presentations where ruptured thyroid cysts led to life-threatening airway compromise requiring intubation. Early recognition of these thyroid cyst complications is crucial.
Conclusion
Neck and anterior chest wall hematoma can be a sign of thyroid cyst rupture/hemorrhage. It is important to recognize this sign to prevent life-threatening airway compromise.
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Affiliation(s)
- Y Sahib
- Lincoln County Hospital, Lincoln, United Kingdom
| | - M Aziz
- Lincoln County Hospital, Lincoln, United Kingdom
| | - M Benamer
- Lincoln County Hospital, Lincoln, United Kingdom
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11
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Kirsch B, Aziz M, Kumar S, Burke M, Webster T, Immadi A, Sam M, Lal A, Estrada-Y-Martin RM, Cherian S, Aisenberg GM. Wells Score to Predict Pulmonary Embolism in Patients with Coronavirus Disease 2019. Am J Med 2021; 134:688-690. [PMID: 33316254 PMCID: PMC7732230 DOI: 10.1016/j.amjmed.2020.10.044] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 09/30/2020] [Accepted: 10/01/2020] [Indexed: 01/17/2023]
Abstract
BACKGROUND The association between coronavirus disease 2019 (COVID-19) and hypercoagulability has been extensively described, and pulmonary embolism is a recognized complication of COVID-19. Currently, the need for computed tomography pulmonary angiogram (CTPA) relies on the Wells score and serum D-dimer levels. However, because COVID-19 patients have a different thrombotic and inflammatory milieu, the usefulness of the Wells score deserves further exploration for this patient population. We aimed to explore the ability of the Wells score to predict pulmonary embolism in patients with COVID-19. METHODS In this retrospective study, patients found to have a CTPA and a COVID-19 diagnosis during the same admission were selected for analysis. Age and sex, CTPA results, and associated D-dimer levels were entered in a database. The Wells score sensitivity and specificity were calculated at different values, and the area under the curve of the receiver operating characteristic curve measured. RESULTS Of 459 patients with COVID-19, 64 had a CTPA and 12 (19%) had evidence of pulmonary embolism. Previous or current evidence of deep vein thrombosis, a Wells score above 4 points, and serum D-dimer levels 5 times above age-adjusted upper normal values were associated with pulmonary embolism. However, only 33% of patients with pulmonary embolism had a Wells score of 4 points or higher. The area under the curve of the receiver operating characteristic showed non-discriminating values (0.54) CONCLUSIONS: Although a Wells score of 4 or more points predicted pulmonary embolism in our cohort, the outcome can be present even with lower scores.
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Affiliation(s)
- Brittany Kirsch
- Division of General Internal Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Moez Aziz
- Division of General Internal Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Sungita Kumar
- Division of General Internal Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Michael Burke
- Division of General Internal Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Tyler Webster
- Division of General Internal Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Amrutha Immadi
- Division of General Internal Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Maurine Sam
- Division of General Internal Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Aditya Lal
- Division of General Internal Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Rosa M Estrada-Y-Martin
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Sujith Cherian
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston
| | - Gabriel Marcelo Aisenberg
- Division of General Internal Medicine, Department of Internal Medicine, The University of Texas, John P. and Kathrine G. McGovern School of Medicine, Houston.
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Aziz M, Saleh H, Abd El-Rahman A. Development of a novel thermoacoustic flue-gas analyzer. AIP Advances 2020; 10. [DOI: 10.1063/5.0015982] [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] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Flue gas analyzers, such as those based on electrochemical cells and infrared sensors, are commonly used to determine the molar concentrations of the different species of flue-gas mixtures and provide information about the associated air-fuel ratio and the resulting combustion efficiency. Here, a new methodology for quaternary-gas analysis that relies on thermoacoustic technology is described for the determination of the composition of typical mixtures of flue gases [A. I. Abd El-Rahman et al., “Thermoacoustic flue-gas analyzer,” EG Patent: International Application No. PCT/EG2020/0000029 (September 23, 2020)]. The hot flue-gas mixtures resulting from the combustion of high-carbon bituminous coal and low-carbon natural gas are allowed to fill in the resonator of an optimized half-wavelength thermoacoustic engine at TH = 900 °C. Under controlled cooling, spontaneous gas–particle oscillations appear at distinct values of resonance frequencies and onset temperature gradients that particularly depend on the molar concentrations of the quaternary-gas components (CO2, CO, O2, and N2) of the introduced samples. Operational ternary diagrams along with respective sensitivity profiles are discussed in detail.
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Affiliation(s)
- M. Aziz
- The Department of Mechanical Power Engineering, Cairo University , Giza 12613, Egypt
| | - H. Saleh
- The Department of Mechanical Power Engineering, Cairo University , Giza 12613, Egypt
| | - A. Abd El-Rahman
- The Department of Mechanical Power Engineering, Cairo University , Giza 12613, Egypt
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Yahya N, Aziz F, Jaafar J, Lau WJ, Yusof N, Salleh WNW, Ismail AF, Aziz M. Impacts of Annealing Temperature on Morphological, Optical and Photocatalytic Properties of Gel-Combustion-Derived LaFeO3 Nanoparticles. Arab J Sci Eng 2020. [DOI: 10.1007/s13369-020-04874-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Graham J, Aziz M, Donisan T, Balanescu DV, Palaskas N, Lopez-Mattei J, Cilingiroglu M, Balanescu SM, Ganim NM, Lin HY, Marmagkiolis K, Molony DA, Durand JB, Iliescu C. The impact of therapeutic mediastinal radiation on stent healing in cancer patients: An optical coherence tomography study. J Clin Oncol 2020. [DOI: 10.1200/jco.2020.38.15_suppl.e19096] [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: 11/20/2022] Open
Abstract
e19096 Background: Cancer is a prothrombotic and proinflammatory state. Understanding stent healing in cancer patients could modify the approach to antiplatelet regimen and facilitate cancer treatment. Mediastinal radiation therapy brings an additional layer of complexity to an already challenging clinical scenario in cancer patients undergoing percutaneous coronary intervention (PCI). We sought to compare stent healing patterns with and without a history of mediastinal radiation therapy using optical coherence tomography (OCT) data. Methods: All cancer patients that underwent PCI and follow-up OCT less than 12 months post-PCI between 2009-2018 were retrospectively identified from our institutional cardiac catheterization laboratory registry. Stent healing, which was defined by a combination of stent and strut coverage, apposition, expansion, in-stent restenosis, and neo-intimal hyperplasia, was compared among 2 groups of oncological PCI patients: those with and without a history of mediastinal radiation therapy. Differences among the two categories were assessed using linear-effect models. Results: There were 86 cancer patients who received PCI with follow-up OCT within 12 months. Of these, 22% received mediastinal radiation. There was no statistical difference in baseline characteristics (hypertension, dyslipidemia, diabetes, etc.) between the two studied groups. In the non-radiation group, 59% were late stage or advanced cancer patients, while 63% of patients in the radiation group were advanced cancer patients. Stent healing was similar among those who had received radiation therapy and those who had not (Table). Conclusions: A history of mediastinal radiation does not appear to affect early stent healing within 1 year of PCI. Given stent healing appears to be similar with or without radiation, dual anti-platelet therapy regimens may not need to change based on radiation exposure alone. Future studies should address the duration of dual antiplatelet regimens and long-term outcomes (i.e. in-stent restenosis) based on stent healing properties. [Table: see text]
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Affiliation(s)
- Jordan Graham
- Department of Internal Medicine, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX
| | - Moez Aziz
- MD Anderson Cancer Center, Cardiology, Houston, TX
| | - Teodora Donisan
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Nicolas Palaskas
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Juan Lopez-Mattei
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Serban Mihai Balanescu
- Department of Cardiology, Elias Emergency University Hospital, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Nidal M Ganim
- Department of Internal Medicine, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX
| | - Heather Y. Lin
- The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Donald A. Molony
- Department of Internal Medicine, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX
| | - Jean-Bernard Durand
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Cezar Iliescu
- Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX
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Donisan T, Balanescu D, Aziz M, Song J, Ntim W, Palaskas N, Lopez-Mattei JC, Kim PY, Cilingiroglu M, Marmagkiolis K, Deswal A, Iliescu C. EARLY RESUMPTION OF CANCER TREATMENT AFTER PERCUTANEOUS CORONARY INTERVENTION: IMPACT ON CARDIOVASCULAR OUTCOMES. J Am Coll Cardiol 2020. [DOI: 10.1016/s0735-1097(20)32034-9] [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: 10/24/2022]
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Aziz M, Balanescu D, Donisan T, Song J, Palaskas N, Lopez-Mattei JC, Kim PY, Cilingiroglu M, Herrmann J, Marmagkiolis K, Deswal A, Iliescu C. INTRACORONARY IMAGING-GUIDED DISCONTINUATION OF DUAL ANTIPLATELET THERAPY IN STENTED PATIENTS REQUIRING EXPEDITED CANCER TREATMENT. J Am Coll Cardiol 2020. [DOI: 10.1016/s0735-1097(20)32035-0] [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: 10/24/2022]
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Shaheen MA, Xiao W, Aziz M, Karim A, Saleem M, Mustaqeem M, Mehmood T, Tahir MN, Sultan A, Simair A, Lu C. Synthesis and Antibacterial Evaluation of Cu(II), Co(II), and Mn(II) Complexes with Schiff Bases Derived from 5-Aminosalicylic Acid and o-Vanillin. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219080231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Dayaghi E, Bakhsheshi-Rad H, Hamzah E, Akhavan-Farid A, Ismail A, Aziz M, Abdolahi E. Magnesium-zinc scaffold loaded with tetracycline for tissue engineering application: In vitro cell biology and antibacterial activity assessment. Materials Science and Engineering: C 2019; 102:53-65. [DOI: 10.1016/j.msec.2019.04.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 05/25/2018] [Accepted: 04/03/2019] [Indexed: 11/16/2022]
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Al-Fakih AM, Algamal ZY, Lee MH, Aziz M, Ali HTM. A QSAR model for predicting antidiabetic activity of dipeptidyl peptidase-IV inhibitors by enhanced binary gravitational search algorithm. SAR QSAR Environ Res 2019; 30:403-416. [PMID: 31122062 DOI: 10.1080/1062936x.2019.1607899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 01/29/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
Time-varying binary gravitational search algorithm (TVBGSA) is proposed for predicting antidiabetic activity of 134 dipeptidyl peptidase-IV (DPP-IV) inhibitors. To improve the performance of the binary gravitational search algorithm (BGSA) method, we propose a dynamic time-varying transfer function. A new control parameter, μ , is added in the original transfer function as a time-varying variable. The TVBGSA-based model was internally and externally validated based on Qint2 , QLGO2 , QBoot2 , MSEtrain , Qext2 , MSEtest , Y-randomization test, and applicability domain evaluation. The validation results indicate that the proposed TVBGSA model is robust and not due to chance correlation. The descriptor selection and prediction performance of TVBGSA outperform BGSA method. TVBGSA shows higher Qint2 of 0.957, QLGO2 of 0.951, QBoot2 of 0.954, Qext2 of 0.938, and lower MSEtrain and MSEtest compared to obtained results by BGSA, indicating the best prediction performance of the proposed TVBGSA model. The results clearly reveal that the proposed TVBGSA method is useful for constructing reliable and robust QSARs for predicting antidiabetic activity of DPP-IV inhibitors prior to designing and experimental synthesizing of new DPP-IV inhibitors.
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Affiliation(s)
- A M Al-Fakih
- a Department of Chemistry, Faculty of Science , Universiti Teknologi Malaysia , Johor , Malaysia
- b Department of Chemistry, Faculty of Science , Sana'a University , Sana'a , Yemen
| | - Z Y Algamal
- c Department of Statistics and Informatics , University of Mosul , Mosul , Iraq
| | - M H Lee
- d Department of Mathematical Sciences, Faculty of Science , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M Aziz
- a Department of Chemistry, Faculty of Science , Universiti Teknologi Malaysia , Johor , Malaysia
- e Advanced Membrane Technology Centre , Universiti Teknologi Malaysia , Johor , Malaysia
| | - H T M Ali
- f College of Computers and Information Technology , Nawroz University , Kurdistan region , Iraq
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Al-Fakih AM, Algamal ZY, Lee MH, Aziz M, Ali HTM. QSAR classification model for diverse series of antifungal agents based on improved binary differential search algorithm. SAR QSAR Environ Res 2019; 30:131-143. [PMID: 30734580 DOI: 10.1080/1062936x.2019.1568298] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
An improved binary differential search (improved BDS) algorithm is proposed for QSAR classification of diverse series of antimicrobial compounds against Candida albicans inhibitors. The transfer functions is the most important component of the BDS algorithm, and converts continuous values of the donor into discrete values. In this paper, the eight types of transfer functions are investigated to verify their efficiency in improving BDS algorithm performance in QSAR classification. The performance was evaluated using three metrics: classification accuracy (CA), geometric mean of sensitivity and specificity (G-mean), and area under the curve. The Kruskal-Wallis test was also applied to show the statistical differences between the functions. Two functions, S1 and V4, show the best classification achievement, with a slightly better performance of V4 than S1. The V4 function takes the lowest iterations and selects the fewest descriptors. In addition, the V4 function yields the best CA and G-mean of 98.07% and 0.977%, respectively. The results prove that the V4 transfer function significantly improves the performance of the original BDS.
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Affiliation(s)
- A M Al-Fakih
- a Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- b Department of Chemistry , Sana'a University , Sana'a , Yemen
| | - Z Y Algamal
- c Department of Statistics and Informatics , University of Mosul , Mosul , Iraq
| | - M H Lee
- d Department of Mathematical Sciences , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M Aziz
- a Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- e Advanced Membrane Technology Centre, Universiti Teknologi Malaysia , Johor , Malaysia
| | - H T M Ali
- f College of Computers and Information Technology, Nawroz University , Kurdistan region , Iraq
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Güdücü C, Olcay BO, Schäfer L, Aziz M, Schriever VA, Özgören M, Hummel T. Separating normosmic and anosmic patients based on entropy evaluation of olfactory event-related potentials. Brain Res 2018; 1708:78-83. [PMID: 30537519 DOI: 10.1016/j.brainres.2018.12.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 05/28/2018] [Revised: 11/08/2018] [Accepted: 12/07/2018] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Methods based on electroencephalography (EEG) are used to evaluate brain responses to odors which is challenging due to the relatively low signal-to-noise ratio. This is especially difficult in patients with olfactory loss. In the present study, we aim to establish a method to separate functionally anosmic and normosmic individuals by means of recordings of olfactory event-related potentials (OERP) using an automated tool. Therefore, Shannon entropy was adopted to examine the complexity of the averaged electrophysiological responses. METHODS A total of 102 participants received 60 rose-like odorous stimuli at an inter-stimulus interval of 10 s. Olfactory-related brain activity was investigated within three time-windows of equal length; pre-, during-, and post-stimulus. RESULTS Based on entropy analysis, patients were correctly diagnosed for anosmia with a 75% success rate. CONCLUSION This novel approach can be expected to help clinicians to identify patients with anosmia or patients with early symptoms of neurodegenerative disorders. SIGNIFICANCE There is no automated diagnostic tool for anosmic and normosmic patients using OERP. However, detectability of OERP in patients with functional anosmia has been reported to be in the range of 50%.
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Affiliation(s)
- C Güdücü
- Dokuz Eylul University Faculty of Medicine Department of Biophysics, 35340 Balcova, Izmir, Turkey; Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany.
| | - B O Olcay
- Izmir Institute of Technology, Faculty of Engineering, Electrical and Electronics Engineering Department, 35430 Urla, Izmir, Turkey
| | - L Schäfer
- Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - M Aziz
- Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - V A Schriever
- Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - M Özgören
- Dokuz Eylul University Faculty of Medicine Department of Biophysics, 35340 Balcova, Izmir, Turkey
| | - T Hummel
- Interdisciplinary Center "Smell and Taste", Department of Otorhinolaryngology, TU Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
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Elsheikh M, Soliman M, Nagwa H, Elsefiy M, Dabos O, Aziz M, Asmaal H. Effect of Laser Acupuncture on Exhaled Inflammatory Bio-markers in Chronic Bronchial Asthma. J Acupunct Meridian Stud 2018. [DOI: 10.1016/j.jams.2018.08.080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Al-Fakih AM, Algamal ZY, Lee MH, Aziz M. A penalized quantitative structure-property relationship study on melting point of energetic carbocyclic nitroaromatic compounds using adaptive bridge penalty. SAR QSAR Environ Res 2018; 29:339-353. [PMID: 29493376 DOI: 10.1080/1062936x.2018.1439531] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 02/07/2018] [Indexed: 06/08/2023]
Abstract
A penalized quantitative structure-property relationship (QSPR) model with adaptive bridge penalty for predicting the melting points of 92 energetic carbocyclic nitroaromatic compounds is proposed. To ensure the consistency of the descriptor selection of the proposed penalized adaptive bridge (PBridge), we proposed a ridge estimator ([Formula: see text]) as an initial weight in the adaptive bridge penalty. The Bayesian information criterion was applied to ensure the accurate selection of the tuning parameter ([Formula: see text]). The PBridge based model was internally and externally validated based on [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], the Y-randomization test, [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and the applicability domain. The validation results indicate that the model is robust and not due to chance correlation. The descriptor selection and prediction performance of PBridge for the training dataset outperforms the other methods used. PBridge shows the highest [Formula: see text] of 0.959, [Formula: see text] of 0.953, [Formula: see text] of 0.949 and [Formula: see text] of 0.959, and the lowest [Formula: see text] and [Formula: see text]. For the test dataset, PBridge shows a higher [Formula: see text] of 0.945 and [Formula: see text] of 0.948, and a lower [Formula: see text] and [Formula: see text], indicating its better prediction performance. The results clearly reveal that the proposed PBridge is useful for constructing reliable and robust QSPRs for predicting melting points prior to synthesizing new organic compounds.
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Affiliation(s)
- A M Al-Fakih
- a Faculty of Science, Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- b Faculty of Science, Department of Chemistry , Sana'a University , Sana'a , Yemen
| | - Z Y Algamal
- c Department of Statistics and Informatics , University of Mosul , Mosul , Iraq
| | - M H Lee
- d Faculty of Science, Department of Mathematical Sciences , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M Aziz
- a Faculty of Science, Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- e Advanced Membrane Technology Centre , Universiti Teknologi Malaysia , Johor , Malaysia
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24
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Fayaz S, Eissa H, Demian G, Aziz M, Abuzallouf S. Breast Cancer in Young Women < 35 years in Kuwait: A Clinicopathological Study. Eur J Cancer 2018. [DOI: 10.1016/s0959-8049(18)30391-5] [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: 10/17/2022]
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25
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Babaran K, Aziz M, Iwanoff C, Hidalgo R, Salamon C. Duration of the Second Stage of Labor and the Risk of Pelvic Floor Dysfunction among Primiparous Women One to Two Years Postpartum. J Minim Invasive Gynecol 2017. [DOI: 10.1016/j.jmig.2017.08.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Whitcroft K, Aziz M, Croy I, Schriever V, Hummel T. Short inter-stimulus intervals can be used for olfactory electroencephalography in patients of varying olfactory function. Neuroscience 2017; 363:26-33. [DOI: 10.1016/j.neuroscience.2017.08.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 08/23/2017] [Accepted: 08/25/2017] [Indexed: 10/18/2022]
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Fayaz M, Demian G, El-Sherify M, Aziz M, Eissa H. Triple negative breast cancer: 10-year survival update of the applied treatment strategy in Kuwait. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx364.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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29
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Al-Fakih AM, Algamal ZY, Lee MH, Aziz M. A sparse QSRR model for predicting retention indices of essential oils based on robust screening approach. SAR QSAR Environ Res 2017; 28:691-703. [PMID: 28976224 DOI: 10.1080/1062936x.2017.1375010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 08/30/2017] [Indexed: 06/07/2023]
Abstract
A robust screening approach and a sparse quantitative structure-retention relationship (QSRR) model for predicting retention indices (RIs) of 169 constituents of essential oils is proposed. The proposed approach is represented in two steps. First, dimension reduction was performed using the proposed modified robust sure independence screening (MR-SIS) method. Second, prediction of RIs was made using the proposed robust sparse QSRR with smoothly clipped absolute deviation (SCAD) penalty (RSQSRR). The RSQSRR model was internally and externally validated based on [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], Y-randomization test, [Formula: see text], [Formula: see text], and the applicability domain. The validation results indicate that the model is robust and not due to chance correlation. The descriptor selection and prediction performance of the RSQSRR for training dataset outperform the other two used modelling methods. The RSQSRR shows the highest [Formula: see text], [Formula: see text], and [Formula: see text], and the lowest [Formula: see text]. For the test dataset, the RSQSRR shows a high external validation value ([Formula: see text]), and a low value of [Formula: see text] compared with the other methods, indicating its higher predictive ability. In conclusion, the results reveal that the proposed RSQSRR is an efficient approach for modelling high dimensional QSRRs and the method is useful for the estimation of RIs of essential oils that have not been experimentally tested.
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Affiliation(s)
- A M Al-Fakih
- a Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- b Department of Chemistry, Faculty of Science , Sana'a University , Sana'a , Yemen
| | - Z Y Algamal
- c Department of Statistics and Informatics , University of Mosul , Mosul , Iraq
| | - M H Lee
- d Department of Mathematical Sciences, Faculty of Science , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M Aziz
- a Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
- e Advanced Membrane Technology Centre , Universiti Teknologi Malaysia , Johor , Malaysia
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Tandon A, Rajendran I, Aziz M, Kolamunnage-Dona R, Nunes QM, Shrotri M. Laparoscopy-assisted gastrectomy in the elderly: experience from a UK centre. Ann R Coll Surg Engl 2017; 99:325-331. [PMID: 27869493 PMCID: PMC5449677 DOI: 10.1308/rcsann.2016.0344] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2016] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Gastric cancer has a high incidence in the elderly in the UK, with a significant number of patients aged 75 years or more. While surgery forms the mainstay of treatment, evidence pertaining to the management of gastric cancer in the Western population in this age group is scarce. METHODS We retrospectively reviewed the outcomes of laparoscopy-assisted total and distal gastrectomies at our centre from 2005 to 2015. Patients aged 70 years or above were included in the elderly group. RESULTS A total of 60 patients underwent laparoscopy-assisted gastrectomy over a 10-year period, with a predominance of male patients. There was no significant difference in the rate of overall surgical and non-surgical complications, in-hospital mortality, operation time and length of hospital stay, between the elderly and non-elderly groups. Univariate analysis, performed for risk factors relating to anastomotic leak and surgical complications, showed that age over 70 years and higher American Association of Anesthesiologists grades are associated with a higher, though not statistically significant, number of anastomotic leaks (P = 1.000 and P = 0.442, respectively) and surgical complications (P = 0.469 and P = 0.162, respectively). The recurrence rate within the first 3 years of surgery was significantly higher in the non-elderly group compared with the elderly group (Log Rank test, P = 0.002). There was no significant difference in survival between the two groups (Log Rank test, P = 0.619). CONCLUSIONS Laparoscopy-assisted gastrectomy is safe and feasible in an elderly population. There is a need for well-designed, prospective, randomised studies with quality of life data to inform our practice in future.
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Affiliation(s)
- A Tandon
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
| | - I Rajendran
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
| | - M Aziz
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
| | - R Kolamunnage-Dona
- MRC North West Hub for Trials Methodology Research , Liverpool , UK
- Department of Biostatistics, Institute of Translational Medicine, University of Liverpool , Liverpool , UK
| | - Q M Nunes
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
- NIHR Liverpool Pancreas Biomedical Research Unit, Royal Liverpool and Broadgreen University, Hospitals NHS Trust, Department of Molecular and Clinical Cancer Medicine, University of Liverpool , Liverpool , UK
| | - M Shrotri
- Department of General Surgery, Aintree University Hospital , Liverpool , UK
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Ismail A, Riaz M, Akhtar S, Yoo S, Park S, Abid M, Aziz M, Ahmad Z. Seasonal variation of aflatoxin B 1 content in dairy feed. J Anim Feed Sci 2017. [DOI: 10.22358/jafs/69008/2017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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32
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Tandon A, Rajendran I, Aziz M, Nunes Q, Shrotri M. Laparoscopic assisted gastrectomy in elderly versus non-elderly patients with gastric cancer: A UK center experience. Int J Surg 2016. [DOI: 10.1016/j.ijsu.2016.08.429] [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: 10/20/2022]
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Algamal ZY, Lee MH, Al-Fakih AM, Aziz M. High-dimensional QSAR modelling using penalized linear regression model with L1/2-norm. SAR QSAR Environ Res 2016; 27:703-719. [PMID: 27628959 DOI: 10.1080/1062936x.2016.1228696] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 08/22/2016] [Indexed: 06/06/2023]
Abstract
In high-dimensional quantitative structure-activity relationship (QSAR) modelling, penalization methods have been a popular choice to simultaneously address molecular descriptor selection and QSAR model estimation. In this study, a penalized linear regression model with L1/2-norm is proposed. Furthermore, the local linear approximation algorithm is utilized to avoid the non-convexity of the proposed method. The potential applicability of the proposed method is tested on several benchmark data sets. Compared with other commonly used penalized methods, the proposed method can not only obtain the best predictive ability, but also provide an easily interpretable QSAR model. In addition, it is noteworthy that the results obtained in terms of applicability domain and Y-randomization test provide an efficient and a robust QSAR model. It is evident from the results that the proposed method may possibly be a promising penalized method in the field of computational chemistry research, especially when the number of molecular descriptors exceeds the number of compounds.
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Affiliation(s)
- Z Y Algamal
- a Department of Mathematical Sciences , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M H Lee
- a Department of Mathematical Sciences , Universiti Teknologi Malaysia , Johor , Malaysia
| | - A M Al-Fakih
- b Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
| | - M Aziz
- b Department of Chemistry , Universiti Teknologi Malaysia , Johor , Malaysia
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Bedi KC, Snyder NW, Brandimarto J, Aziz M, Mesaros C, Worth AJ, Wang LL, Javaheri A, Blair IA, Margulies KB, Rame JE. Evidence for Intramyocardial Disruption of Lipid Metabolism and Increased Myocardial Ketone Utilization in Advanced Human Heart Failure. Circulation 2016; 133:706-16. [PMID: 26819374 DOI: 10.1161/circulationaha.115.017545] [Citation(s) in RCA: 408] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 12/28/2015] [Indexed: 12/16/2022]
Abstract
BACKGROUND The failing human heart is characterized by metabolic abnormalities, but these defects remains incompletely understood. In animal models of heart failure there is a switch from a predominance of fatty acid utilization to the more oxygen-sparing carbohydrate metabolism. Recent studies have reported decreases in myocardial lipid content, but the inclusion of diabetic and nondiabetic patients obscures the distinction of adaptations to metabolic derangements from adaptations to heart failure per se. METHODS AND RESULTS We performed both unbiased and targeted myocardial lipid surveys using liquid chromatography-mass spectroscopy in nondiabetic, lean, predominantly nonischemic, advanced heart failure patients at the time of heart transplantation or left ventricular assist device implantation. We identified significantly decreased concentrations of the majority of myocardial lipid intermediates, including long-chain acylcarnitines, the primary subset of energetic lipid substrate for mitochondrial fatty acid oxidation. We report for the first time significantly reduced levels of intermediate and anaplerotic acyl-coenzyme A (CoA) species incorporated into the Krebs cycle, whereas the myocardial concentration of acetyl-CoA was significantly increased in end-stage heart failure. In contrast, we observed an increased abundance of ketogenic β-hydroxybutyryl-CoA, in association with increased myocardial utilization of β-hydroxybutyrate. We observed a significant increase in the expression of the gene encoding succinyl-CoA:3-oxoacid-CoA transferase, the rate-limiting enzyme for myocardial oxidation of β-hydroxybutyrate and acetoacetate. CONCLUSIONS These findings indicate increased ketone utilization in the severely failing human heart independent of diabetes mellitus, and they support the role of ketone bodies as an alternative fuel and myocardial ketone oxidation as a key metabolic adaptation in the failing human heart.
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Affiliation(s)
- Kenneth C Bedi
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Nathaniel W Snyder
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Jeffrey Brandimarto
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Moez Aziz
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Clementina Mesaros
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Andrew J Worth
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Linda L Wang
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Ali Javaheri
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Ian A Blair
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - Kenneth B Margulies
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.)
| | - J Eduardo Rame
- From Cardiovascular Institute University of Pennsylvania Perelman School of Medicine, Smilow Translational Research Center, Philadelphia, PA (K.C.B., J.B., A.J., K.B.M., J.E.R.); A.J. Drexel Autism Institute, Drexel University, Philadelphia, PA (N.W.S.); and Center of Cancer Pharmacology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA (M.A., C.M., A.J.W., L.L.W., I.A.B.).
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Gad H, Omar H, Aziz M, Hassan M, Khalil M. Treatment of Rice Husk Ash to Improve Adsorption Capacity of Cobalt from Aqueous Solution. ACTA ACUST UNITED AC 2016. [DOI: 10.14233/ajchem.2016.19364] [Citation(s) in RCA: 14] [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: 11/12/2022]
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Abstract
Anterior caliceal stones represent a challenge to endourologist to select the best modality of management with the least morbidity. To study different treatment modalities of management of anterior caliceal stones >15 mm. It is an observational prospective study of patients with anterior caliceal stones more than 15 mm. Inclusion criteria were patients with isolated anterior caliceal stones, or branched anterior caliceal stones with posterior caliceal extension. Patients were evaluated using non-contrast CT preoperatively. They were divided into three groups: group 1 underwent PCNL through posterior caliceal puncture in cases with wide anterior calyx infundibulum or obtuse infundibulopelvic pelvic, group 2 underwent PCNL through anterior caliceal access in cases with narrow infundibulum or acute infundibulopelvic angel and group 3 underwent flexible ureteroscopy and laser lithotripsy. Intraoperative and postoperative findings were recorded and compared. Eighty eight patients were included in this study, Group 1 (44 patients) group 2 (28 patients), and group 3 (16 patients). Operative time was not significantly different across the three groups (68 ± 11.5, 72 ± 9 and 74 ± 11 min in group 1, 2 and 3, respectively, P = 0.053). Fluoroscopy time was significantly shorter for group 3 (2 ± 0.5 m, P = 0.0001) compared to group 1 and 2 (5.6 ± 4.6 and 4.5 ± 1.4 min), respectively. There were no significant differences in stone-free rates after initial treatment between the three groups; 84, 82, and 69 %, in groups 1, 2 and 3, respectively (P = 0.4). Postoperative hemoglobin drop was noted to be highest for group 2 and lowest for group 3 which was significantly different (1.7 ± 0.8, 2.2 ± 1.1, and 0.3 ± 0.3 g/dl, for patients in groups 1, 2 and 3 respectively, P = 0.0001). Group 2 showed the highest post-operative complication rate (21 %) in comparison to group 1 (11 %) and group 3 (6 %), however, differences were not statistically significant (P = 0.3). PCNL through posterior or anterior caliceal puncture is an excellent modality to treat anterior caliceal stones with high stone clearance rate. Despite the higher chance of bleeding with anterior caliceal puncture, it is still inevitably needed in difficult anterior caliceal stones with unfavorable anatomy. RIRS is a good alternative to PCNL with the advantage of less radiation exposure and less bleeding.
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Affiliation(s)
- M El-Shazly
- Urology Department, Menoufia University, Shibin Al Kom, Egypt.
| | - M Aziz
- Urology Department, Menoufia University, Shibin Al Kom, Egypt
| | - M Omar
- Urology Department, Menoufia University, Shibin Al Kom, Egypt
| | - O Al-Hunaidi
- Urology Department, Farwaniya Hospital, Kuwait City, Kuwait
| | - A R El-Nahas
- Urology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
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Ayaz MM, Nazir MM, Lashari MH, Akhtar S, Khosa MA, Aziz M, Zahid H, Ali S, Muneeb M, Malik A, Haider S, Zafar Z. Recovery of Schistosoma haematobium ovum from Labeo rohita: first report from Pakistan. Trop Biomed 2015; 32:399-401. [PMID: 26695198] [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: 06/05/2023]
Abstract
Schistosomiasis, also known as bilharzia, is a parasitic disease caused by trematodes from the genus Schistosoma that can infect humans and animals. S. mansoni, S. japonicum, and S. mekongi all causes intestinal schistosomiasis except S. haematobium that causes urinary schistosomiasis. It is only specie which effects urinary system, it can affect liver, heart, lungs also but very rarely. Schistosoma haematobium is endemic to over 50 countries in Africa and the Middle East and Western Asia and may be fatal in HIV positive people. A number of reports from the African countries like Nigeria have been reported. A few cases are reported but in Pakistan it has never been reported before in native people. It is first time reported in Pakistan in the intestine of Rahu (Labeo rohita). The purpose of this study is to elaborate the approach of zoonotic agent by various other routes including the commonly available fish.
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Affiliation(s)
- M M Ayaz
- Department of Pathobiology, Faculty of Veterinary Sciences, Bahauddin Zakariya University Multan, Pakistan
| | | | - M H Lashari
- Department of Life Sciences, Islamia University, Bahawalpur
| | - S Akhtar
- Department of Clinical Sciences, Faculty of Veterinary Sciences, Bahauddin Zakariya University Multan, Pakistan
| | - M A Khosa
- Department of Pathobiology, Faculty of Veterinary Sciences, Bahauddin Zakariya University Multan, Pakistan
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EL-Khawlani A, Aziz M, Ismail M, Ellithi AY. Analysis of a homogenous and heterogeneous stylized half core of a CANDU reactor. KERNTECHNIK 2015. [DOI: 10.3139/124.110482] [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: 11/20/2022]
Abstract
Abstract
The MCNPX (Monte Carlo N-Particle Transport Code System) code has been used for modeling and simulation of a half core of CANDU (CANada Deuterium-Uranium) reactor, both homogenous and heterogeneous model for the reactor core are designed. The fuel is burnt in normal operation conditions of CANDU reactors. Natural uranium fuel is used in the model. The multiplication factor for homogeneous and heterogeneous reactor core is calculated and compared during fuel burnup. The concentration of both uranium and plutonium isotopes are analysed in the model. The flux and power distributions through channels are calculated.
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Affiliation(s)
- A. EL-Khawlani
- Physics Department , Faculty of Science, High Education, Sana'a , Yemen. E-mail:
| | - M. Aziz
- Nuclear and radiological regulatory authority , 3 Ahmed Alzomer street, P.O. Box 755, Nasr city, Cairo , Egypt. E-mail:
| | - M. Ismail
- Faculty of Science , Cairo University, Cairo , Egypt
| | - A. Y. Ellithi
- Faculty of Science , Cairo University, Cairo , Egypt. E-mail:
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Peiris SPM, Hanratty DR, Naguib NN, Aziz M, Haray PN. Use of the Endoractor in laparoscopic colorectal surgery - a video vignette. Colorectal Dis 2015; 17:175. [PMID: 25469721 DOI: 10.1111/codi.12855] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 11/19/2014] [Indexed: 02/08/2023]
Affiliation(s)
- S P M Peiris
- Department of Colorectal Surgery, Prince Charles Hospital, Merthyr Tydfil, CF47 9DT, UK.
| | - D R Hanratty
- Department of Colorectal Surgery, Prince Charles Hospital, Merthyr Tydfil, CF47 9DT, UK
| | - N N Naguib
- Department of Colorectal Surgery, Prince Charles Hospital, Merthyr Tydfil, CF47 9DT, UK
| | - M Aziz
- Department of Anaesthesia, Prince Charles Hospital, Merthyr Tydfil, CF47 9DT, UK
| | - P N Haray
- Department of Colorectal Surgery, Prince Charles Hospital, Merthyr Tydfil, CF47 9DT, UK
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Bertrand J, Marion-Letellier R, Azhar S, Chan P, Legrand R, Goichon A, Aziz M, Vaudry D, Déchelotte P, Savoye G, Coëffier M. P213: L’administration de glutamine par voie rectale modifie le profil d’expression colique des protéines ubiquitinées au cours d’une colite chez le rat : focus sur le métabolisme mitochondrial. NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70855-6] [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: 10/24/2022]
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Bertrand J, Marion-Letellier R, Azhar S, Chan P, Legrand R, Goichon A, Aziz M, Vaudry D, Savoye G, Déchelotte P, Coëffier M. PP281-SUN: Outstanding abstract: Glutamine Enema Regulates Colonic Ubiquitinated-Proteins but not Proteasome Activities During TNBS-Induced Colitis Leading to Increased Mitochondrial Activity. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50322-6] [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: 10/24/2022]
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Melin A, Tornberg ÅB, Skouby S, Møller SS, Sundgot-Borgen J, Faber J, Sidelmann JJ, Aziz M, Sjödin A. Energy availability and the female athlete triad in elite endurance athletes. Scand J Med Sci Sports 2014; 25:610-22. [PMID: 24888644 DOI: 10.1111/sms.12261] [Citation(s) in RCA: 136] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2014] [Indexed: 12/31/2022]
Abstract
The female athlete triad (Triad), links low energy availability (EA), with menstrual dysfunction (MD), and impaired bone health. The aims of this study were to examine associations between EA/MD and energy metabolism and the prevalence of Triad-associated conditions in endurance athletes. Forty women [26.2 ± 5.5 years, body mass index (BMI) 20.6 ± 2.0 kg/m(2), body fat 20.0 ± 3.0%], exercising 11.4 ± 4.5 h/week, were recruited from national teams and competitive clubs. Protocol included gynecological examination; assessment of bone health; indirect respiratory calorimetry; diet and exercise measured 7 days to assess EA; eating disorder (ED) examination; blood analysis. Subjects with low/reduced EA (< 45 kcal/kg FFM/day), had lower resting metabolic rate (RMR) compared with those with optimal EA [28.4 ± 2.0 kcal/kg fat-free mass (FFM)/day vs 30.5 ± 2.2 kcal/kg FFM/day, P < 0.01], as did subjects with MD compared with eumenorrheic subjects (28.6 ± 2.4 kcal/kg FFM/day vs 30.2 ± 1.8 kcal/kg FFM/day, P < 0.05). 63% had low/reduced EA, 25% ED, 60% MD, 45% impaired bone health, and 23% had all three Triad conditions. 53% had low RMR, 25% hypercholesterolemia, and 38% hypoglycemia. Conclusively, athletes with low/reduced EA and/or MD had lowered RMR. Triad-associated conditions were common in this group of athletes, despite a normal BMI range. The high prevalence of ED, MD, and impaired bone health emphasizes the importance of prevention, early detection, and treatment of energy deficiency.
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Affiliation(s)
- A Melin
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Frederiksberg, Denmark
| | - Å B Tornberg
- Department of Health Sciences, Division of Physiotherapy, Lund University, Lund, Sweden.,Genetic & Molecular Epidemiology (GAME) Unit, Lund University Diabetes Center, Clinical Research Center, Skåne University Hospital, Malmö, Sweden
| | - S Skouby
- Endocrinological and Reproductive Unit, Department of Ob/Gyn. Herlev Hospital, Faculty of Health and Medical Sciences, University of Copenhagen, Herlev, Denmark
| | - S S Møller
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Frederiksberg, Denmark
| | | | - J Faber
- Endocrinological and Reproductive Unit, Department of Ob/Gyn. Herlev Hospital, Faculty of Health and Medical Sciences, University of Copenhagen, Herlev, Denmark
| | - J J Sidelmann
- Unit for Thrombosis Research, Institute of Public Health, University of Southern Denmark, Esbjerg, Denmark
| | - M Aziz
- Endocrinological and Reproductive Unit, Department of Ob/Gyn. Herlev Hospital, Faculty of Health and Medical Sciences, University of Copenhagen, Herlev, Denmark
| | - A Sjödin
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Frederiksberg, Denmark
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Abstract
OBJECTIVE To evaluate the plasma level of YKL-40 in a Danish polycystic ovary syndrome (PCOS) population and to investigate whether YKL-40 is associated with CVD risk factors such as waist circumference, body mass index (BMI), insulin resistance (IR), fasting glucose, fasting insulin, blood lipids and CRP. DESIGN Cross-sectional study. SETTING Gynecological clinics at three Danish University Hospitals. PATIENTS One hundred seventy-one premenopausal women with PCOS recruited consecutively from April 2010 to February 2012. PCOS was diagnosed according to the Rotterdam criteria. MAIN OUTCOME MEASURES Plasma level of YKL-40 in four phenotypes of PCOS defined by BMI and IR. RESULTS No statistically significant difference was observed in the plasma level of YKL-40 across the four BMI/IR-phenotypes. Positive associations were observed between YKL-40 and BMI, total and free testosterone, triglycerides, and CRP. Total and free testosterone were independent predictors of YKL-40. CONCLUSION YKL-40, the marker of low-grade inflammation is not increased in women with PCOS.
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Affiliation(s)
- M Aziz
- Department of Gynaecology and Obstetrics, Faculty of Health and Medical Sciences, Herlev Hospital, Copenhagen University , Herlev , Denmark
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Aziz M, Kessler H, Huhn G. Providers' lack of knowledge about herpes zoster in HIV-infected patients is among barriers to herpes zoster vaccination. Int J STD AIDS 2013; 24:433-9. [PMID: 23970744 DOI: 10.1177/0956462412472461] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Identification of perceptions about herpes zoster (HZ) disease, vaccine effectiveness and safety, and vaccine recommendations may impact immunization practices of physicians for HIV-infected patients. A survey was used to quantify knowledge of HZ as well as determine physician immunization perceptions and practices. There were 272/1700 respondents (16%). Correct answers for the incidence of varicella zoster virus (VZV) infection in adults and incidence of HZ in HIV-infected patients were recorded by 14% and 10% of providers, respectively. Providers reported poor knowledge of the incidence of disease recurrence in HIV-infected patients (41% correct), potency of HZ vaccine (47.5% correct) and mechanism of protection against reactivation of VZV (66% correct). Most (88%) agreed that HZ was a serious disease, and 73% believed that the burden of disease made vaccination important. A majority (75%) did not vaccinate HIV patients with HZ vaccine regardless of antiretroviral therapy status. Barriers to administration included safety concerns, concern that vaccine would not prevent HZ, risk of HZ dissemination, reimbursement issues and lack of Infectious Diseases Society of America (IDSA) guidelines. Only 38% of providers agreed that CDC guidelines were clear and 50% believed that clinical trials were needed prior to use of HZ vaccine in HIV-infected patients. Education about HZ is needed among HIV providers. Providers perceived vaccination as important, but data on vaccine safety and clear guidance from the CDC on this issue are lacking.
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Affiliation(s)
- M Aziz
- Rush University Medical Center/John H Stroger Hospital of Cook County, Chicago, IL, USA.
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Abstract
Abstract
Neutronic calculations were performed for the new loading configuration of the ETRR-1 research reactor. The MCNP three dimensions Monte Carlo code and the two dimensions CITATION code are used to model the reactor. The power and thermal flux distributions in the reactor core are calculated. The power peak factor and the effect of control rod insertion on both flux and power profiles in the reactor core are determined and analyzed. The partial and total control rods worth are calculated. It was found that the difference between MCNP and CITATION in power distributions is 4 to 8 % and for thermal flux ranges between 3 to 14 %.
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Affiliation(s)
- M. Aziz
- Assistant Prof., National Center for Nuclear Safety, 3 Ahmed Alzomer street, Nasr City, Cairo, Egypt. E-mail:
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Aziz M. Calculation of control plates life time and worth at the ETRR-2 research reactor. KERNTECHNIK 2013. [DOI: 10.3139/124.100205] [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: 11/20/2022]
Abstract
Abstract
A detailed three-dimensional MCNP model of the ETRR-2 research reactor has been developed for the analysis of the neutronic parameters of the reactor. The model was used to determine the partial control plates reactivity worth and the behavior of the worth with time. The results of the present model were compared with the experimental measurements for partial control plates reactivity worth and with the design calculations for control plates behavior with time. The comparisons indicate satisfactory agreement.
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Affiliation(s)
- M. Aziz
- National Center for Nuclear Safety, 3 Ahmed Alzomer Street, P.O. Box 7551, Nasr City, Cairo, Egypt,
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Abstract
Abstract
The MCNP computer Code is used to model the ETRR-2 research reactor. A computer program was designed to evaluate the axial burn-up of the fuel elements. The excess reactivity of the reactor core is calculated for different core configurations and compared with the existing measurements. The thermal flux is also calculated and compared with measurements. Several factors that affect the safety of the reactor such as power peak and the effect of control rod insertion on the reactor power and flux were studied and analysed. The agreement between the MCNP results and the experimentally determined values is good.
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Affiliation(s)
- M. Aziz
- National Center For Nuclear Safety, Atomic Energy Authority, Cairo, Egypt. E-mail:
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