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A Mohamed A, A Abdalla A, Jan YK. Role of Enhancing Aerobic Capacity in Countering COVID-19-induced Liver Injury in Elderlies. Endocr Metab Immune Disord Drug Targets 2023:EMIDDT-EPUB-135797. [PMID: 37937559 DOI: 10.2174/0118715303250788231018080821] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 08/25/2023] [Accepted: 09/15/2023] [Indexed: 11/09/2023]
Abstract
COVID-19 is still a world disaster; however, its vaccination is globally available. Liver and gastrointestinal disturbances occur in patients infected with COVID-19 at varying incidences. Aging decreases the functions of the liver. Thus, the elderly have a weaker response to the COVID-19 virus. The COVID-19 virus affects the liver directly through direct and indirect mechanisms. It directly affects the renin-angiotensin system or indirectly causes sepsis, uncontrolled immune reactions, drug-related hepatic injury, and cytokine storm. Also, COVID-19 vaccines and anti-drugs have adverse effects on the liver too. Thus, this review explores the effect of enhancing aerobic capacity as a nonpharmacological intervention on decreasing COVID- 19-induced liver injury. Enhancing aerobic capacity decreases COVID-19-induced liver injury through the following: 1) downregulating systemic and tissue ACE/ANG II/AT1R axis, upregulating ACE2/ANG 1-7/Mas axis, and moving the renin-angiotensin system to the direction of the ACE2/ANG (1-7)/Mas axis, 2) Improving mitochondrial function and oxygenation to body and lung tissues, causing a decrease in harmful oxidative reactions, 3) Increasing the processing of accumulated free radicals and inhibiting the acute respiratory distress syndrome, 4) Acting as an antioxidant to protect the liver from oxidative stress, 5) Increasing the effect of antiviral drugs and COVID-19 vaccines, which improves the function of immune biomarkers, decreases the viral load, and increases the body's defense against the virus, 6) Decreasing coagulation abnormalities and thrombosis. In conclusion, enhancing aerobic capacity may be an efficient nonpharmacological intervention to decrease COVID-19-induced liver injury in elderlies and regenerate the liver to its normal status after being infected by the COVID-19 virus. It also helps to strengthen the body's immunity for better effects of both COVID-19 vaccination and drugs.
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Affiliation(s)
- Ayman A Mohamed
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA
- Department of Basic Sciences, Faculty of Physical Therapy, Beni-Suef University, Beni Suef, Egypt
- Faculty of Physical Therapy, Nahda University, Beni Suef, Egypt
| | - Ahmed A Abdalla
- Department of Basic Sciences, Faculty of Physical Therapy, Beni-Suef University, Beni Suef, Egypt
| | - Yih-Kuen Jan
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA
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Mohamed AA, Khaled E, Hesham A, Khalf A. Effectiveness and safety of subthreshold vibration over suprathreshold vibration in treatment of muscle fatigue in elderly people. World J Clin Cases 2023; 11:3434-3443. [PMID: 37383890 PMCID: PMC10294188 DOI: 10.12998/wjcc.v11.i15.3434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/29/2023] [Accepted: 04/20/2023] [Indexed: 05/25/2023] Open
Abstract
Muscle fatigue is common in many populations, particularly elderlies. Aging increases the incidence of muscle fatigue and delays its recovery. There is a huge debate about the current treatments for muscle fatigue, particularly in elderlies. Recently, it has been discovered that mechanoreceptors have an important role as a sensory system in sensing muscle fatigue which could enhance the body's response to muscle fatigue. The function of mechanoreceptors could be enhanced by applying either suprathreshold or subthreshold vibration. Although suprathreshold vibration improves muscle fatigue, it can cause desensitization of cutaneous receptors, discomfort, and paresthesia, which are barriers to clinical use. Subthreshold vibration has been approved as a safe and effective method of training for mechanoreceptors; however, its use and effectiveness in muscle fatigue have never been tested or explained. Possible physiological effects of subthreshold vibration in the treatment of muscle fatigue include: (1) Enhancing the function of mechanoreceptors themselves; (2) Increasing the firing rate and function of alpha motor neurons; (3) Increasing blood flow to fatigued muscles; (4) Decreasing the rate of muscle cell death in elderlies (sarcopenia); and (5) Driving motor commands and allow better performance of muscles to decrease fatigue incidence. In conclusion, the use of subthreshold vibration could be a safe and effective treatment for muscle fatigue in elderlies. It could enhance recovery from muscle fatigue. Finally, Subthreshold Vibration is safe and effective in treating muscle fatigue in comparison to suprathreshold vibration.
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Affiliation(s)
- Ayman A Mohamed
- Physical Therapy, Nahda University, Beni Suef 23435, Egypt
- Physical Therapy, Beni-Suef University, Beni Suef 32456, Egypt
| | - Esraa Khaled
- Physical Therapy, Nahda University, Beni Suef 23435, Egypt
| | - Asmaa Hesham
- Physical Therapy, Nahda University, Beni Suef 23435, Egypt
| | - Ahmed Khalf
- Physical Therapy, Nahda University, Beni Suef 23435, Egypt
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Mohamed AA, Zhang X, Jan YK. Evidence-based and adverse-effects analyses of cupping therapy in musculoskeletal and sports rehabilitation: A systematic and evidence-based review. J Back Musculoskelet Rehabil 2023; 36:3-19. [PMID: 35848010 DOI: 10.3233/bmr-210242] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Cupping therapy has been used to treat musculoskeletal impairments for about 4000 years. Recently, world athletes have provoked an interest in it, however, the evidence to support its use in managing musculoskeletal and sports conditions remains unknown. OBJECTIVE To evaluate the evidence level of the effect of cupping therapy in managing common musculoskeletal and sports conditions. METHODS 2214 studies were identified through a computerized search, of which 22 met the inclusion criteria. The search involved randomized and case series studies published between 1990 and 2019. The search involved five databases (Scopus, MEDLINE (PubMed), Web of Science, Academic Search Complete PLUS (EBSCO), and CrossRef) and contained studies written in the English language. Three analyses were included: the quality assessment using the PEDro scale, physical characteristic analysis, and evidence-based analysis. RESULTS The results showed that most studies used dry cupping, except five which used wet cupping. Most studies compared cupping therapy to non-intervention, the remaining studies compared cupping to standard medical care, heat, routine physiotherapy, electrical stimulation, active range of motion and stretching, passive stretching, or acetaminophen. Treatment duration ranged from 1 day to 12 weeks. The evidence of cupping on increasing soft tissue flexibility is moderate, decreasing low back pain or cervical pain is low to moderate, and treating other musculoskeletal conditions is very low to low. The incidence of adverse events is very low. CONCLUSION This study provides the first attempt to analyze the evidence level of cupping therapy in musculoskeletal and sports rehabilitation. However, cupping therapy has low to moderate evidence in musculoskeletal and sports rehabilitation and might be used as a useful intervention because it decreases the pain level and improves blood flow to the affected area with low adverse effects.
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Affiliation(s)
- Ayman A Mohamed
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA.,Department of Basic Sciences, Faculty of Physical Therapy, Beni-Suef University, Beni Suef, Egypt.,Faculty of Physical Therapy, Nahda University, Beni Suef, Egypt
| | - Xueyan Zhang
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA
| | - Yih-Kuen Jan
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA
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Alawna M, Mohamed AA. An integrated intervention combining cognitive-behavioural stress management and progressive muscle relaxation improves immune biomarkers and reduces COVID-19 severity and progression in patients with COVID-19: A randomized control trial. Stress Health 2022; 38:978-988. [PMID: 35393715 PMCID: PMC9111066 DOI: 10.1002/smi.3151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 03/26/2022] [Accepted: 04/04/2022] [Indexed: 12/16/2022]
Abstract
COVID-19 is a world disaster. In response to COVID-19 quarantine, stress, anxiety, and depression may easily develop which negatively affect immunity and decrease the patient's response against the COVID-19 virus. This study investigated the effect of an integrated intervention combining cognitive-behavioural stress management (CBSM) and progressive muscle relaxation (PMRs) on immune biomarkers and disease severity and progression in patients with COVID-19 and the period to which these changes last. Thirty patients with mild or moderate COVID-19 were randomly distributed into intervention and control groups. The intervention group performed an integrated intervention combining CBSM and PMRs. There were three outcome measures including blood immune markers, salivary immunoglobulin A, and Wisconsin scale (WIS). Two-week post-intervention, there were significant differences between groups in the WIS total score, Leucocytes, Lymphocytes, Interleukin-6, and Immunoglobulin-A. While there were non-significant differences between both groups in Interleukin-10 and TNF-α. The significant differences between groups in the WIS total score, Leucocytes, Lymphocytes, Interleukin-6, and Immunoglobulin-A significantly continued 1 week as a follow-up. This study concluded that performing an integrated intervention combining CBSM and PMRs for 2 weeks significantly increases immune biomarkers mainly Leucocytes, Lymphocytes, Interleukin-10, and Interleukin-6 along with S-IgA. Also, this protocol significantly decreases disease severity and associated stress, anxiety, and depression; and enhances the quality of life in patients with COVID-19. The study was retrospectively registered with NCT04998708.
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Affiliation(s)
- Motaz Alawna
- Department of Health SciencesFaculty of Graduate SciencesArab American UniversityJeninPalestine
| | - Ayman A. Mohamed
- Department of Basic SciencesFaculty of Physical TherapyBeni‐Suef UniversityBeni SuefEgypt
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Mohamed AA. Influence of enhancing dynamic scapular recognition on shoulder disability, and pain in diabetics with frozen shoulder: A case report. World J Clin Cases 2022; 10:12410-12415. [PMID: 36483817 PMCID: PMC9724531 DOI: 10.12998/wjcc.v10.i33.12410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/14/2022] [Accepted: 10/27/2022] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Frozen shoulder (FS) is a familiar disorder. Diabetics with FS have more severe symptoms and a worse prognosis. Thus, this study investigated the influence of enhancing dynamic scapular recognition on shoulder disability and pain in diabetics with FS.
CASE SUMMARY A Forty-five years-old male person with diabetes mellitus and a unilateral FS (stage II) for at least 3 mo with shoulder pain and limitation in both passive and active ranges of motion (ROMs) of the glenohumeral joint of ≥ 25% in 2 directions participated in this study. This person received dynamic scapular recognition exercise was applied to a diabetic person with a unilateral FS (stage II). The main outcome measures were upward rotation of the scapula, shoulder pain and disability index, and shoulder range of motion of flexion, abduction, and external rotation. The dynamic scapular exercise was performed for 15 min/session and 3 sessions/wk lasted for 4 wk. After 4 wk of intervention, there were improvements between pre-treatment and post-treatment in shoulder pain, shoulder pain and disability index, shoulder ROM, and upward rotation of the scapula.
CONCLUSION This case report suggested that enhancing dynamic scapular recognition may improve shoulder pain and disability; upward rotation of the scapula; and shoulder ROM of shoulder abduction, flexion, and external rotation after 4 wk.
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Affiliation(s)
- Ayman A Mohamed
- Basic Sciences Department, Faculty of Physical Therapy, Beni-Suef University, Beni Suef 34522, Egypt
- Basic Sciences Department, Faculty of Physical Therapy, Nahda University, Beni Suef 23146, Egypt
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Mohamed AA, Alawna M. Effect of Adding Vertical Correction to Dynamic Scapular Recognition on Scapular Dyskinesis and Shoulder Disability in Patients With Adhesive Capsulitis: A Randomized Clinical Study. J Chiropr Med 2022; 21:124-135. [DOI: 10.1016/j.jcm.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 10/18/2022] Open
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Mohamed AA, Al-Karmalawy AA, El-Kholy AA, El-Damas DA, Abostate HM, Mostafa SM, Hamada M, Khalik Elkady MA, Hassan Y, Al-Hussain E, Khalil MG, Badawy I, Elebeedy D, Alsfouk BA, Shaheenl MM. Effect of Vitamin D supplementation in patients with liver cirrhosis having spontaneous bacterial peritonitis: a randomized controlled study. Eur Rev Med Pharmacol Sci 2021; 25:6908-6919. [PMID: 34859852 DOI: 10.26355/eurrev_202111_27239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Spontaneous Bacterial Peritonitis (SBP) is one of the most serious liver cirrhosis with ascites complications. Vitamin D (Vit D) deficiency has been associated with a high risk of infection and mortality in cirrhotic patients. Herein, the assessment of Vit D level as a prognostic marker in SBP patients and the impact of Vit D supplementation on their treatment plan was studied as well. PATIENTS AND METHODS Ascetic patients with SBP and Vit D deficiency were divided randomly into treatment and control groups. The control group received standard treatment without Vit D and the treatment group received standard treatment plus Vit D. Clinical monitoring of Vit D was done over 6 months. RESULTS At baseline, all patients in both groups revealed an elevated serum and ascetic TLC, AST, ALT, total and direct bilirubin, in addition to elevation in INR and procalcitonin (PCT) level. Univariate regression analysis confirmed that deficiency of Vit D was an independent predictor of infection and mortality (p < 0.01; Crude Hazard Ratio: 0.951). Over 6 months, the study revealed significant improvement in serum Vit D level in the treatment group (34.6 ± 9.2 and 18.3 ± 10.0 ng/mL; p < 0.001). Moreover, a statistically significant increase in survival rate (64% vs. 42%; p < 0.05) and duration (199.5 days vs. 185.5 days; p < 0.05) were recorded as well. Univariate and multivariate regression analysis confirmed that Vit D supplementation was positively correlated to survival over 6 months (p < 0.001; Adjusted Hazard Ratio: 0.895). CONCLUSIONS Vit D deficiency is prevalent in SBP cirrhotic patients and is used as an independent predictor of infection and death. Therefore, Vit D supplementation revealed improvement in their response to treatment.
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Affiliation(s)
- A A Mohamed
- Biochemistry, Molecular Biology and Biochemistry Department, National Hepatology and Tropical Medicine Research Institute, Egypt.
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Mohamed AA, Alawna M. The effect of aerobic exercise on immune biomarkers and symptoms severity and progression in patients with COVID-19: A randomized control trial. J Bodyw Mov Ther 2021; 28:425-432. [PMID: 34776174 PMCID: PMC8339452 DOI: 10.1016/j.jbmt.2021.07.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [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: 12/22/2020] [Revised: 07/09/2021] [Accepted: 07/31/2021] [Indexed: 01/19/2023]
Abstract
BACKGROUND The World Health Organization in March 2020 has announced that COVID-19 is a world pandemic because the number of infected cases increases rapidly. however, there are several available vaccines, their protection is limited to a certain period. Thus, the role of modalities that improve immune functions should be performed to counter COVID-19 viral load and decrease mortality rates. OBJECTIVE To investigate the effect of aerobic exercise on immune biomarkers, disease severity, and progression in patients with COVID-19. DESIGN A randomized controlled study. PARTICIPANTS Thirty patients with COVID-19 participated in this study. Participants' age ranged from 24 to 45 years old. Participants had a mild or moderate COVID-19. Participants were assigned randomly into two groups, exercise and control groups. There were two main dependent variables including blood immune markers and severity of respiratory symptoms. INTERVENTIONS All participants performed 2 weeks of moderate-intensity aerobic exercise for 40 min/session, 3 sessions/week. The measurements were performed at baseline, and after 2-weeks. RESULTS At baseline measurements, there were non-significant differences between both groups in the Wisconsin scale total score, Leucocytes, Lymphocytes, Interleukin-6, Interleukin-10, Immunoglobulin-A, and TNF-α (P > .05). After the intervention, the Wisconsin scale (patient-oriented illness-specific quality-of-life) total score significantly decreased in the intervention group (P < .05); while, Leucocytes, Lymphocytes, and Immunoglobulin-A significantly increased in the intervention group (P < .05). CONCLUSION The current study indicated that 2 weeks of moderate-intensity aerobic exercise decreased the severity and progression of COVID-19 associated disorders and quality of life. Also, a 2-weeks of aerobic exercise positively affected immune function by increasing the amounts of Leucocytes, Lymphocytes, Immunoglobulin A.
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Affiliation(s)
- Ayman A Mohamed
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey; Department of Basic Sciences, Faculty of Physical Therapy, Beni-Suef University, Beni Suef, Egypt
| | - Motaz Alawna
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey; Department of Physiotherapy and Rehabilitation, Faculty of Allied Medical Sciences, Arab American University, Jenin, Palestine.
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Murphy CF, Elliott JA, Docherty NG, Mohamed AA, Vincent RP, Ravi N, Reynolds JV, le Roux CW. Exaggerated postprandial GLP-1 secretion following esophagectomy is not associated with gastric emptying and intestinal transit. Dis Esophagus 2021; 34:5907940. [PMID: 32944747 DOI: 10.1093/dote/doaa098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/09/2020] [Accepted: 08/13/2020] [Indexed: 12/11/2022]
Abstract
Esophagectomy causes postprandial symptoms associated with an exaggerated postprandial gut hormone response. This study aimed to compare the gastrointestinal transit time of patients 1 year after esophagectomy with unoperated controls, including its relation to satiety gut hormone release. In this cross-sectional study, consecutive, disease-free patients after esophagectomy with pyloroplasty were compared with unoperated control subjects to assess gastric emptying (GE) and cecal arrival time (CAT). Serial plasma samples were collected before, and for 300 minutes after, a mixed-meal challenge. Body composition was assessed, and symptom scores were calculated. Eleven patients 1 year post-esophagectomy (age: 62.6 ± 9.8, male: 82%) did not show a significantly different GE pattern compared with 10 control subjects (P = 0.245). Rather, patients could be categorized bimodally as exhibiting either rapid or slow GE relative to controls. Those with rapid GE trended toward a higher postprandial symptom burden (P = 0.084) without higher postprandial glucagon-like peptide-1 (GLP-1) secretion (P = 0.931). CAT was significantly shorter after esophagectomy (P = 0.043) but was not significantly associated with GE, GLP-1 secretion, or symptom burden. Neither early nutrient delivery to the proximal small intestine nor to the colon explains the exaggerated postprandial GLP-1 response after esophagectomy. GE varies significantly in these patients despite consistent pyloric management.
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Affiliation(s)
- C F Murphy
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland.,National Oesophageal and Gastric Centre, Trinity Centre for Health Sciences, Trinity College Dublin and St. James's Hospital, Dublin 8, Ireland
| | - J A Elliott
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland.,National Oesophageal and Gastric Centre, Trinity Centre for Health Sciences, Trinity College Dublin and St. James's Hospital, Dublin 8, Ireland
| | - N G Docherty
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland
| | - A A Mohamed
- Department of Clinical Biochemistry, King's College Hospital NHS Foundation Trust, London, UK
| | - R P Vincent
- Department of Clinical Biochemistry, King's College Hospital NHS Foundation Trust, London, UK
| | - N Ravi
- National Oesophageal and Gastric Centre, Trinity Centre for Health Sciences, Trinity College Dublin and St. James's Hospital, Dublin 8, Ireland
| | - J V Reynolds
- National Oesophageal and Gastric Centre, Trinity Centre for Health Sciences, Trinity College Dublin and St. James's Hospital, Dublin 8, Ireland
| | - C W le Roux
- Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Ireland
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Mohamed AA, Zaher AM, Khalifa MI, AbdElhakem MM, Eloteify* LM. Correlation of Primary Tumor Metabolic Parameters with Clinical, Histopathological and Molecular Characteristics in Breast Cancer Patients at Preoperative Staging FDG-PET/CT Study. Tumori 2021. [DOI: 10.1177/03008916211012340] [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: 11/17/2022]
Abstract
Introduction: The aim of this prospective study was to evaluate the correlation of primary (1ry)tumor metabolic activity parameters maximum standardized uptake value (SUVmax) and tumor SUVmax/liver average SUV ratio (TLR) in initial staging 18F-fluorodeoxyglucose (FDG) positron emission tomography / computerized tomography (PET/CT) scan with clinical, histopathological and molecular characteristics of breast cancer (BC) patients. Material and Methods: Initial staging PET/CT was performed in 40 cases with different stages of BC in the supine position. Tumor FDG uptake was qualitatively evaluated and quantitatively assessed using SUVmax and TLR. Results: Forty female patients with newly diagnosed BC were enrolled in our study, age range from 31-78 (mean 50.5 +/- SD11.7). All the 1ry tumors were detected with mean SUVmax 10.8(+/-SD 7.9). The mean /median SUVmax values of 1ry tumor was higher in premenopausal, stage III& IV, Estrogen Receptors negative(ER-), Progesteron Receptors negative(PR-), Her2neu positive patients, high nuclear grade (GIII), in triple negative molecular subgroup (TN), positive axillary nodal (ALNs)metastases, and (P value = 0.003, 0.017, 0.113, 0.089 0.01,0.002, 0.007 & 0.016 respectively). The mean/median TLR values was higher in premenopausal and Her2neu positive, GIII, TN molecular subtype patients, stage III& IV and in patients with positive ALNs, ER- &PR - patients (P value = 0.002, 0.0476, 0.005, 0.018, 0.039 and 0.022, 0.095 & 0.129 respectively). SUVmax of the 1ry lesion and TLR were moderately negatively correlated with the age of the patients (P value = 0.005 and 0.008 respectively), also they were moderately positively correlated with the size of the1ry tumor (P value = 0.019 and 0.036 respectively). Conclusion: The SUVmax of the 1ry tumor and TLR values had similar significant associations with different prognostic factors in BC
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Affiliation(s)
- AA Mohamed
- Clinical oncology and nuclear medicine department, Assuit university hospital Egypt
| | - AM Zaher
- Nuclear medicine department NCI cairo university Egypt
| | - MI Khalifa
- Clinical oncology and nuclear medicine department, Assuit university hospital Egypt
| | - MM AbdElhakem
- Clinical oncology and nuclear medicine department, Assuit university hospital Egypt
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Mohamed AA, Elshawadfy AM, Amin G, Askora A. Characterization of R-pyocin activity against Gram-positive pathogens for the first time with special focus on Staphylococcus aureus. J Appl Microbiol 2021; 131:2780-2792. [PMID: 33977611 DOI: 10.1111/jam.15134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 02/23/2021] [Accepted: 05/04/2021] [Indexed: 11/29/2022]
Abstract
AIM This study is aimed at characterization of both antimicrobial and anti-biofilm activity of R-pyocin from clinical Pseudomonas aeruginosa against Gram-positive pathogens including Staphylococcus aureus. METHODS AND RESULTS Pyocinogenic P. aeruginosa was detected using reverse-side method, and pyocinogeny typing was confirmed using revised-spotting method. Transmission electron microscopy (TEM) was used for morphological characterization of R-pyocin and for detection of changes in membrane of R-pyocin-treated S. aureus. SDS-PAGE analysis was used for detection of the molecular weight of R-pyocin protein-subunits and Poisson-killing-distribution assay for burst-size calculation. Lipotechoic-acid (LTA) adsorption-assay was used to confirm whether LTA in Gram-positive bacteria served as R-pyocin receptor. Moreover, R-pyocin production at 10-60°C was assessed herein. Host-range of activity of R-pyocin was tested against antimicrobial resistant (AMR) pathogens. The anti-biofilm activity of R-pyocin was detected against sensitive bacterial strains. Chemical, enzymatic, pH and thermo-stability of R-pyocin were evaluated. TEM micrographs revealed a typical morphology of myotailocins indicating the production of R-pyocin designated as RPU15. TEM revealed pores formation in S. aureus membrane, and bacteriophage-like plaques were obvious on plates of R-pyocin-treated S. aureus. R-pyocin activity was neutralized by LTA of S. aureus and Listeria monocytogenes. Pseudomonas aeruginosa PU15 produced ~428 non-inducible R-pyocin particles. RPU15 sheath and tube protein-subunits exhibited a molecular weight of 38 and 23 kDa, respectively. RPU15 possessed activity against S. aureus, L. monocytogenes, Bacillus cereus and Candida albicans and reduced biofilm-biomasses of tested AMR strains. CONCLUSION Our results show the potential therapeutic use of R-pyocin due to its effectiveness on tested bacterial biofilms. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first study that investigates antimicrobial and anti-biofilm activity of R-pyocin activity against S. aureus. R-pyocin shows new phenomenon of bacteriophage-like plaques. Our findings represent a future therapeutic agent targeting both methicillin-resistant and vancomycin-resistant S. aureus.
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Affiliation(s)
- A A Mohamed
- Department of Microbiology and Botany, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - A M Elshawadfy
- Department of Microbiology and Botany, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - G Amin
- Department of Microbiology and Botany, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - A Askora
- Department of Microbiology and Botany, Faculty of Science, Zagazig University, Zagazig, Egypt
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Shabana YM, Samy MA, Abdel-Aziz MA, Hindawi ME, Mosry MG, Albarawy ARM, Omar MM, Mohamed AA, Attia AA. Enhancing the performance of micro-biosensors by functionally graded geometrical and material parameters. Arch Appl Mech 2021; 91:2497-2511. [PMID: 33642701 PMCID: PMC7895744 DOI: 10.1007/s00419-021-01900-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 01/29/2021] [Indexed: 06/12/2023]
Abstract
Most recently, the whole world is struggling against the virulent pandemic COVID-19. Due to the unbounded global spread of the disease, having biosensors with high performance such as high sensitivity and accuracy is of utmost importance. In this paper, the effects of various parameters on the behaviors of micro-biosensors are investigated in order to enhance their performance. These parameters are related to the geometry and material, and they are assumed to be gradually changing in the longitudinal direction of the biosensor according to a power law. Therefore, they are called functionally graded geometrical and material parameters. Another aspect is when considering microcantilever-based biosensors, the main behavior parameter is the deflection at the free end. In the analyses, the influences of the surface stress and van der Waals intermolecular forces are taken into account. Also, the total energy of the beam, which is the combination of the van der Waals energy and the elastic strain energy, is accomplished. In addition, the equivalent force causing the deflection is also evaluated using Castigliano method for two cases. These cases account for a concentrated force at the free end and a distributed load along the biosensor, respectively. Since the governing equations account for the size dependency and the considered parameters are functions of the position, the solution is too complex to be achieved analytically, and therefore, numerical methods are applied. For uniform biosensors made of homogeneous materials, or in other words when all parameters are not varying with the position, the obtained results are compared with those in the literature, and good agreement is obtained. On the other hand, the performance, which include sensitivity and limit of detection, of functionally graded biosensors can be enhanced by proper choices of the considered parameters and the corresponding exponent of the gradation function.
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Affiliation(s)
- Yasser M. Shabana
- Faculty of Engineering, Helwan University, P.O. Box 11718, Mataria, Cairo, Egypt
| | - Mohamed A. Samy
- Faculty of Engineering, Helwan University, P.O. Box 11718, Mataria, Cairo, Egypt
| | | | - Mohamed E. Hindawi
- Faculty of Engineering, Helwan University, P.O. Box 11718, Mataria, Cairo, Egypt
| | - Mohamed G. Mosry
- Faculty of Engineering, Helwan University, P.O. Box 11718, Mataria, Cairo, Egypt
| | | | - Mazen M. Omar
- Faculty of Engineering, Helwan University, P.O. Box 11718, Mataria, Cairo, Egypt
| | - Ayman A. Mohamed
- Faculty of Engineering, Helwan University, P.O. Box 11718, Mataria, Cairo, Egypt
| | - Ahmed A. Attia
- Faculty of Engineering, Helwan University, P.O. Box 11718, Mataria, Cairo, Egypt
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13
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Alawna M, Amro M, Mohamed AA. Aerobic exercises recommendations and specifications for patients with COVID-19: a systematic review. Eur Rev Med Pharmacol Sci 2021; 24:13049-13055. [PMID: 33378057 DOI: 10.26355/eurrev_202012_24211] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
OBJECTIVE This review was conducted to systematically analyze the effects of aerobic exercise on immunological biomarkers to provide safe aerobic exercise recommendations and specifications for patients with COVID-19. MATERIALS AND METHODS A systematic search was conducted through MEDLINE (PubMed), Science Direct, Web of Science, Scopus, Cochrane Library, and SciELO databases. The search included the following keywords "immune system", "immune cell", or "immune function"; "aerobic training", "aerobic exercise", or "physical activity"; "human" or "adult"; and "cytokine", "killer cell", "T cell", "interleukin", "lymphocyte", "leukocyte" or "adhesion molecule". RESULTS Eleven studies met the inclusion and exclusion criteria of this search. The most used exercise prescriptions included walking, cycling, or running. The duration of exercise ranged from 18 to 60 min with an intensity of 55% to 80% of VO2max or 60%-80% of maximum heart rate. The frequency range was 1 to 3 times/week. The mainly increased immunological biomarkers included leukocytes, lymphocytes, neutrophils, monocytes, eosinophils, IL-6, CD16-56, CD16, CD4, CD3, CD8, and CD19. CONCLUSIONS This review demonstrated that patients with COVID-19 should follow a regular program of aerobic exercise for 20-60 min. This program should be in the form of cycling or walking with an intensity of 55%-80% VO2max or 60%-80% of maximum heart rate. This program should be repeated 2-3 sessions/week. These previous parameters could safely enhance immune functions without producing any exhaustion.
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Affiliation(s)
- M Alawna
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey.
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Mohamed AA, Alawna M. Important Role of Relaxation Techniques in Immune Functions, Glycemic Control, and Stress in Diabetic Patients with COVID-19: A Review. Curr Diabetes Rev 2021; 17:e121020186816. [PMID: 33045980 DOI: 10.2174/1573399816999201012200109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/16/2020] [Accepted: 09/21/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND COVID-19 is a world disaster. The relationship between COVID-19 and Diabetes Mellitus (DM) is double-faced because DM is considered one of the COVID-19 key risk factors causing an increase in COVID-19 related conditions and death rates; at the same time, high stress in patients with COVID-19 can lead to the occurrence of DM. This relationship adversely affects immune functions. Relaxation techniques have been demonstrated to positively affect immune functions, glycemic control, and stress levels. METHODS A search in Scopus, Web of Science, Medline databases, and EBSCO has been made. The search included clinical trials and systematic and literature reviews on the effects of relaxation techniques on immune functions, glycemic control, and stress levels. RESULTS This review found that relaxation techniques produce short-term effects on decreasing stress levels through autonomic regulation, controlling glycemic control through decreasing hyperglycemia, and increasing immune functions through increasing immune cells and immunoglobins A. CONCLUSION This review summarizes the important role of performing regular relaxation techniques in COVID-19 patients with DM. Relaxation techniques benefit diabetic patients with COVID-19 through decreasing stress levels, better controlling of glycemic control, and increasing immune functions.
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Affiliation(s)
- Ayman A Mohamed
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey
| | - Motaz Alawna
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey
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Affiliation(s)
- Ayman A. Mohamed
- Department of Physiotherapy, Faculty of Health Sciences, Istanbul Gelisim University, Turkey
| | - Motaz Alawna
- Department of Physiotherapy, Faculty of Health Sciences, Istanbul Gelisim University, Turkey
- Department of Physiotherapy and Rehabilitation, Faculty of Allied Medical Sciences, Arab American University, Jenin, Palestin
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Alawna M, Mohamed AA. Short-term and long-term effects of ankle joint taping and bandaging on balance, proprioception and vertical jump among volleyball players with chronic ankle instability. Phys Ther Sport 2020; 46:145-154. [PMID: 32937273 DOI: 10.1016/j.ptsp.2020.08.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 08/23/2020] [Accepted: 08/26/2020] [Indexed: 12/14/2022]
Abstract
OBJECTIVE This study hypothesized that the prolonged use of taping during athletic activities produces more significant increases in proprioception, balance, and vertical jump among volleyball players with CAI. DESIGN A randomized controlled study. PARTICIPANTS One-hundred participants with chronic ankle instability (CAI) participated in this study. Participants were distributed into 3-groups: taping group, bandaging group, and control group. PRIMARY OUTCOME MEASURES Proprioception (ankle range of motion absolute error), balance(Y-balance test), and vertical jump (vertical jump tester). INTERVENTIONS Three interventions were performed: ankle rigid taping, ankle bandaging, and placebo taping. The measurements were performed at baseline, immediately, 2-weeks and 2-months after support. RESULTS Immediately after supports, there were non-significant differences between all groups for proprioception, balance (P < .05). There was a significant difference between banding and control groups, and taping and control groups for the vertical jump (P < .05). After 2-weeks and 2-months, there were significant differences between bandaging and control groups, and taping and control groups for proprioception, balance, and vertical jump (P < .05). There were non-significant differences between taping and bandaging groups (P < .05) during all assessments. CONCLUSION This study indicated that ankle taping and bandaging immediately improve vertical jump only; while they improve proprioception, balance, and vertical jump after 2-weeks and 2-months.
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Affiliation(s)
- Motaz Alawna
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey; Department of Physiotherapy and Rehabilitation, Faculty of Allied Medical Sciences, Arab American University, Jenin, Palestine.
| | - Ayman A Mohamed
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey
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Hussein Elsayed N, Najmi AH, Mohamed GM, Mohamed AA, Al‐Sayed HMA. Preparation and characterization of Paraloid B‐72/
TiO
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nanocomposite and their effect on the properties of polylactic acid as strawberry coating agents. J Food Saf 2020. [DOI: 10.1111/jfs.12838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Nadia Hussein Elsayed
- Department of Chemistry, University College – Alwajh University of Tabuk Tabuk Saudi Arabia
- Department of Polymers and Pigments, National Research Centre, Dokki Cairo Egypt
| | - Ali Hussein Najmi
- Department of Education and Psychology, Collage of Education and Literature University of Tabuk Tabuk Saudi Arabia
| | - Ghena M. Mohamed
- Department of Nutrition and Food Science, Faculty of Home Economic University of Tabuk Tabuk Saudi Arabia
| | - Ayman A. Mohamed
- Food Technology Department National Research Centre, Dokki Cairo Egypt
| | - Hanan M. A. Al‐Sayed
- Department of Nutrition and Food Science, Faculty of Home Economic University of Tabuk Tabuk Saudi Arabia
- Food Science Department, Faculty of Agricultural Ain Shams University Cairo Egypt
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Mohamed AA, Omran D, El-Feky S, Darwish H, Kassas A, Farouk A, Ezzat O, Abdo SM, Zahran FE, El-Demery A, Omran MM. Toll-like receptor 7 mRNA is reduced in hepatitis C-based liver cirrhosis and hepatocellular carcinoma, out-performs alpha-fetoprotein levels, and with age and serum aspartate aminotransferase is a new diagnostic index. Br J Biomed Sci 2020; 78:18-22. [PMID: 32573389 DOI: 10.1080/09674845.2020.1778842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 02/08/2023]
Abstract
BACKGROUND Hepatitis B and C viruses are leading causes of liver cirrhosis and hepatocellular carcinoma (HCC). Toll-like receptor 7 (TLR-7) has been implicated in the pathogenesis of HCC linked to hepatitis B. We hypothesised a role of leukocyte TLR-7 mRNA in hepatitis C related liver cirrhosis and HCC, using alpha-fetoprotein (AFP) and liver function tests as comparators. METHODS We recruited 102 patients with HCV-related HCC, 97 with HCV-related liver cirrhosis and 60 healthy controls. Quantification of TLR-7 mRNA was performed using real-time PCR, AFP and routine LFTs by standard techniques. RESULTS TLR-7 mRNA levels were significantly lower in HCC patients compared to cirrhotic patients and lower again in healthy controls (p < 0.001 for trend). In multivariate analysis, age, aspartate transaminase (AST), AFP, and TLR-7 mRNA were significant predictors of HCC. The ROCC/AUC for age, AST and TLR-7 mRNA were all between 0.64 and 0.78 (all P < 0.01), but for AFP was 0.57 (95% CI 0.48-0.65, P = 0.09). We derived an index score using age, AST and TLR-7 mRNA for the diagnosis of HCC. The ROCC/AUC for the index was superior to all three root indices in the prediction of HCC. The index linked significantly with the Tokyo and Vienna liver cancer staging systems, but not with those of the CLIP and Okuda systems, in distinguishing HCC from liver cirrhosis. CONCLUSION The combination of TLR-7 mRNA levels with age and AST improves the performance of TLR-7 in HCC diagnosis, out-performs alpha-fetoprotein and predicts early HCC.
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Affiliation(s)
- A A Mohamed
- Biochemistry Department, National Hepatology and Tropical Medicine Research Institute, Cairo University , Giza, Egypt
| | - D Omran
- Department of Endemic Medicine and Hepatology, Faculty of Medicine, Cairo University , Giza, Egypt
| | - S El-Feky
- Biochemistry Department, Damanhur Medical National Institute , Egypt
| | - H Darwish
- Oncology Department, Ismailia Teaching Oncology Hospital , Ismailia, Egypt
| | - Ael Kassas
- Radiology Department, El Sahel Teaching Hospital , Cairo, Egypt
| | - A Farouk
- Radiology Department, National Institute of Diabetes and Endocrinology , Giza, Egypt
| | - O Ezzat
- Biochemistry Department, Faculty of Pharmacy, Egyptian Russian University , Cairo, Egypt
| | - S M Abdo
- Chemistry Department, Faculty of Science, Helwan University , Cairo, Egypt
| | - F E Zahran
- Internal Medicine Department, Faculty of Medicine (Girls), Al-azhar University , Cairo, Egypt
| | - A El-Demery
- Biochemistry Department, Faculty of Medicine, October 6 University , 6th of October City, Egypt
| | - M M Omran
- Chemistry Department, Faculty of Science, Helwan University , Cairo, Egypt
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Mohamed AA, Jan YK, El Sayed WH, Wanis MEA, Yamany AA. Dynamic scapular recognition exercise improves scapular upward rotation and shoulder pain and disability in patients with adhesive capsulitis: a randomized controlled trial. J Man Manip Ther 2020; 28:146-158. [PMID: 31200629 PMCID: PMC7480516 DOI: 10.1080/10669817.2019.1622896] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Examine the ability of a dynamic scapular recognition exercise to improve scapular upward rotation and decrease shoulder pain and disability in patients with adhesive capsulitis of the shoulder. METHODS A test-retest randomized controlled study design was used. A total of sixty-six patients with unilateral adhesive capsulitis were equally divided into two groups. The study group received a dynamic scapular recognition exercise using a wireless biofeedback system, while the control group received placebo treatment in the form of active range-of-motion (ROM) exercises of the sound upper limb. A digital inclinometer was used to measure the scapular upward rotation and ROM of the shoulder joint, and the Shoulder Pain and Disability Index (SPADI) was used to measure the shoulder pain and disability. RESULTS Study results showed that after two weeks, there were statistically significant differences between the study and control groups in scapular upward rotation and shoulder flexion and abduction (P < .05) and nonsignificant differences in shoulder external rotation and SPADI (P > .05). After two and six months, there were statistically significant differences between study and control groups in scapular upward rotation; shoulder flexion, abduction and external rotation; and SPADI scores (P < .05). CONCLUSION This study showed that a dynamic scapular recognition exercise significantly improves scapular upward rotation and the ROM of shoulder flexion and abduction after two weeks. At two and six months, this exercise improves scapular upward rotation; ROM of shoulder flexion, abduction, and external rotation; and SPADI scores. These improvements persisted for six months after the performance of this exercise.
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Affiliation(s)
- Ayman A. Mohamed
- Rehabilitation Engineering Lab, Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA
- Department of Basic Science and Biomechanics, Faculty of Physical Therapy, Beni-Suef University, Beni-SuefEgypt
| | - Yih-Kuen Jan
- Rehabilitation Engineering Lab, Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL, USA
| | - Wadida H. El Sayed
- Department of Basic Science, Faculty of Physical Therapy, Cairo University, GizaEgypt
| | | | - Abeer A. Yamany
- Department of Basic Science, Faculty of Physical Therapy, Cairo University, GizaEgypt
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20
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Abdeltawab A, Zaki ME, Abdeldayem Y, Mohamed AA, Zaied SM. Circulating micro RNA-223 and angiopoietin-like protein 8 as biomarkers of gestational diabetes mellitus. Br J Biomed Sci 2020; 78:12-17. [PMID: 32421465 DOI: 10.1080/09674845.2020.1764211] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Gestational diabetes mellitus (GDM) is a serious health problem associated with both foetal and maternal complications. New biomarkers that can predict or help in the early diagnosis of GDM are needed to minimize the hazards of hyperglycaemia in pregnant women and their offspring. We hypothesised a link between levels of microRNA-223 (miRNA-223) and Angiopoietin-Like Protein 8 (ANGPTL8) and GDM. MATERIALS AND METHODS The study included 109 patients with confirmed early diagnosed GDM and 103 healthy control pregnant women in their second or third trimester. miRNA-223 and ANGPTL8 blood levels were assessed by real-time RT-PCR and sandwich ELISA, respectively, laboratory markers by standard methods. RESULTS There was a significant increase in mean [SD] miRNA-223 and ANGPTL8 in GDM (0.31 [0.06] relative units) and (692 [199] pg/ml), respectively, in the GDM women compared to healthy pregnant women (0.17[0.05] relative units) and (261 [127] pg/ml), respectively, P < 0.001. miRNA-223 and ANGPTL8 correlated significantly with each other (r = 0.38, P < 0.001) and with fasting, 1-h and 2-h postprandial blood glucose levels (all P ≤ 0.002) HbA1 c (P < 0.025), total cholesterol (P < 0.01), LDL-C and triglycerides (both P ≤ 0.005). The ROC area under curve (AUC) (95%CI) was 0.94 (0.91-0.97) for ANGPTL8, 0.92 (0.88-0.96) for miRNA-223 and 0.97 (0.95 - 0.99) for their combination. CONCLUSIONS These findings support the hypothesis of involvement of both miRNA-223 and ANGPTL8 in the pathogenesis of GDM. The difference between levels in GDM patients and in control pregnant women indicates potential use for early diagnosis or prediction of GDM.
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Affiliation(s)
- A Abdeltawab
- Physiology Department, College of Medicine, Jouf University , Sakaka, Saudi Arabia.,Physiology Department, Faculty of Medicine, Beni-Suef University , Beni-Suef, Egypt
| | - M E Zaki
- Clinical Pathology Department, Faculty of Medicine, Mansoura University , Mansoura, Egypt
| | - Y Abdeldayem
- Obstetric and Gynecology Department, Mansoura University , Mansoura, Egypt
| | - A A Mohamed
- Medical Biochemistry Division, Pathology Department, Jouf University , Sakaka, Saudi Arabia.,Medical Biochemistry Department, Faculty of Medicine, Beni-Suef University , Beni-Suef, Egypt
| | - S M Zaied
- Clinical and Chemical Pathology Department, Faculty of Medicine, Beni-Suef University , Beni-Suef, Egypt
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Mohamed AA, Alawna M. Role of increasing the aerobic capacity on improving the function of immune and respiratory systems in patients with coronavirus (COVID-19): A review. Diabetes Metab Syndr 2020; 14:489-496. [PMID: 32388326 PMCID: PMC7186129 DOI: 10.1016/j.dsx.2020.04.038] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 04/25/2020] [Accepted: 04/25/2020] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND AIMS COVID-19 is a public world crisis, however, it is a self-limited infection. In COVID-19, the strength of immune and respiratory systems is a critical element. Thus, this review was conducted to demonstrate the short and long term effects of increasing the aerobic capacity on increasing the function and strength of immune and respiratory systems, particularly those essential for overcoming COVID-19 infections and associated disorders. METHODS This review was carried out by searching in Web of Science, Scopus, EBSCO, Medline databases. The search was conducted over clinical trials and literature and systematic reviews on the effects of increasing the aerobic capacity on the function and strength of specific immune and respiratory elements essential for overcoming COVID-19 infections. RESULTS This review found that increasing the aerobic capacity could produce short-term safe improvements in the function of immune and respiratory systems, particularly those specific for COVID-19 infections. This could be mainly produced through three mechanisms. Firstly, it could improve immunity by increasing the level and function of immune cells and immunoglobulins, regulating CRP levels, and decreasing anxiety and depression. Secondly, it could improve respiratory system functions by acting as an antibiotic, antioxidant, and antimycotic, restoring normal lung tissue elasticity and strength. Lastly, it could act as a protective barrier to decrease COVID-19 risk factors, which helps to decrease the incidence and progression of COVID-19. CONCLUSION This review summarizes that increasing the aerobic capacity is recommended because it has potential of improving immune and respiratory functions which would help counter COVID-19.
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Affiliation(s)
- Ayman A Mohamed
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey.
| | - Motaz Alawna
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey.
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Mohamed AA. Can Proprioceptive Training Enhance Fatigability and Decrease Progression Rate of Sarcopenia in Seniors? A Novel Approach. Curr Rheumatol Rev 2020; 17:58-67. [PMID: 32348231 DOI: 10.2174/1573397116666200429113226] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 04/08/2020] [Accepted: 04/13/2020] [Indexed: 01/03/2023]
Abstract
Sarcopenia is a common condition in older adults, which causes the frequent occurrence of muscle fatigue. Muscle fatigue commonly develops among seniors. Muscle fatigue is a type of physical fatigue that occurs due to either motor or sensory dysfunctions. Current interventions developed to decrease the occurrence of muscle fatigue, which include either increasing rest periods or subdividing large tasks into small ones. The effectiveness of these interventions is highly contradicted. Recently, researchers discovered that mechanoreceptors are the main receptors of muscle fatigue, however, no clinical study investigated the effect of performing proprioceptive training to enhance the mechanoreceptors and decrease the occurrence of muscle fatigue. Performing proprioceptive training could improve muscle fatigue by improving its sensory part. The function of mechanoreceptors might consequently enhance fatigue and decrease the progression rate of sarcopenia. Thus, this review was conducted to suggest a novel approach of treatment to enhance fatigue and decrease Sarcopenia in seniors. This might be accomplished through increasing the firing rate of α- motor neurons, increasing the amount of Ca2+ ions in the neuromuscular junction, slowing the progression rate of Sarcopenia, and correcting movement deviations, which commonly occur with muscle fatigue in seniors. In conclusion, proprioceptive training could play an effective role in decreasing the progression rate of sarcopenia and enhancing the fatigability among seniors.
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Affiliation(s)
- Ayman A Mohamed
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey
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23
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Mohamed AA, Jan YK. Effect of Adding Proprioceptive Exercise to Balance Training in Older Adults with Diabetes: A Systematic Review. Curr Diabetes Rev 2020; 16:327-339. [PMID: 31526352 DOI: 10.2174/1573399815666190712200147] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 06/12/2019] [Accepted: 06/25/2019] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Accidental fall is a serious problem in older adults. The incidence of accidental fall increases by any dysfunction in the proprioceptive system. The function of the proprioceptive system usually is much affected in people with Diabetes Mellitus (DM), particularly in older ages. However, proprioceptive exercise significantly improves the balance control in older adults, no systematic review demonstrated its effectiveness in improving the balance control in older adults with DM. Thus, this systematic review was conducted to examine the effectiveness of adding proprioceptive exercise to any balance training in older adults with DM. METHODS A systematic search was performed in five major databases. The inclusion criteria of this search included older adults with DM, peripheral neuropathy, randomized control trial, and proprioceptive dysfunction. The exclusion criterion of this search included any study where participants had a history of a disease that might affect the balance control such as ataxia, stroke, and Parkinsonism. The outcome of interest was the importance of including proprioceptive exercise in increasing the effectiveness of balance training in older adults with DM. RESULTS Nine RCTs met the inclusion criteria for this systematic review. Seven studies of these nine studies included randomization details. Only two studies included the blindness, and only one of them included double blindness. The description of the withdrawal of participants was shown in eight studies. All the included studies used a control group and accomplished the homogeny between subjects in the both groups. CONCLUSION This systematic review showed that proprioceptive exercise is a vital component that should be included in any balance training to gain short-term improvement in the balance control in older adults with DM.
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Affiliation(s)
- Ayman A Mohamed
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey
| | - Yih-Kuen Jan
- Department Department of Kinesiology and Community Health, College of Applied Health Sciences, University of Illinois at Urbana-Champaign, Champaign, IL, United States
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Hussain S, Mohamed AA, Alamri MS, Ibraheem MA, Abdo Qasem AA, Serag El-Din MF, Almaiman SAM. Wheat-millet flour cookies: Physical, textural, sensory attributes and antioxidant potential. FOOD SCI TECHNOL INT 2019; 26:311-320. [PMID: 31818128 DOI: 10.1177/1082013219894127] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Millet flour (water washed or alkali washed) was replaced with wheat flour (WF) at 0, 25, 50, 75, and 100% levels. Objectives of the research were to characterize the flour blends for their technical properties and to produce cookies with less or no gluten contents. All types of flour blends were evaluated for their pasting properties. The cookies were baked and evaluated for their textural and physical attributes. Inclusion of millet flour (both types) in wheat flour resulted in significant reduction in peak and final viscosities while setback viscosities were affected non-significantly. Pasting temperature was increased from 65 ℃ (100% wheat flour) to 91 ℃ (100% millet flour). The hardness of cookies was reduced in the presence of millet flour. Fracturability values of cookies with higher millet flour were higher as compared to control cookies (prepared from 100% wheat flour). Cookies prepared from blends having more that 50% millet flour were not much liked by sensory panelists. The phenolic contents of cookies containing higher levels of either water washed or alkali washed millet flour were found to be higher when compared to cookies prepared from plain WF (1.90 ± 0.14 mg gallic acid/g sample). The 2,2-diphenyl-1-picrylhydrazyl activity (%) of cookies ranged from 16.39 ± 0.34 (100% water washed millet flour) to 10.39 ± 0.26 (100% WF; control). The study will help the non-coeliac people to consume low gluten (≈1.6-6.5%) or gluten intolerant people to consume gluten-free cookies (0%) from millet flour having abundant of antioxidants and health-promoting polyphenols.
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Affiliation(s)
- S Hussain
- Department of Food Sciences, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - A A Mohamed
- Department of Food Sciences, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - M S Alamri
- Department of Food Sciences, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - M A Ibraheem
- Department of Food Sciences, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Akram A Abdo Qasem
- Department of Food Sciences, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed F Serag El-Din
- Department of Food Sciences, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia.,Department of Nutrition and Food Science, Faculty of Home Economics, Menoufia University, Menoufia, Egypt
| | - Salah Abdulaziz M Almaiman
- Department of Food Sciences, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
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25
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Mohamed AA. Can Proprioceptive Training Reduce Muscle Fatigue in Patients With Motor Neuron Diseases? A New Direction of Treatment. Front Physiol 2019; 10:1243. [PMID: 31632290 PMCID: PMC6779805 DOI: 10.3389/fphys.2019.01243] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 11/24/2018] [Accepted: 09/10/2019] [Indexed: 12/11/2022] Open
Abstract
Muscle fatigue is a serious problem in patients with motor neuron diseases (MNDs). It commonly disturbs both daily life activity and rehabilitation tolerance. A particular concern should be taken when MNDs occur in older ages. Older patients with MNDs usually have a worse clinical presentation and a lower survival rate. This could increase the occurrence of muscle fatigue. Muscle fatigue occurs due to a dysfunction in either motor or sensory systems. Current exercise interventions performed to decrease the occurrence of muscle fatigue focused only on treating motor causes of muscle fatigue. It has been demonstrated that these interventions have a high debate in their effectiveness on decreasing the occurrence of muscle fatigue. Also, these exercise interventions ignored training the affected sensory part of muscle fatigue, however, the important role of the sensory system in driving the motor system. Thus, this review aimed to develop a novel exercise intervention by using proprioceptive training as an intervention to decrease the occurrence of muscle fatigue in patients with MNDs particularly, older ones. The physiological effects of proprioceptive training to decrease the occurrence of muscle fatigue could include two effects. The first effect includes the ability of the proprioceptive training to increase the sensitivity of muscle spindles as an attempt to normalize the firing rate of α-motoneurons, which their abnormalities have major roles in the occurrence of muscle fatigue. The second effect includes its ability to correct the abnormal movement-compensations, which develop due to the biomechanical constraints imposed on patients with MNDs.
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Affiliation(s)
- Ayman A. Mohamed
- Department of Physiotherapy and Rehabilitation, School of Health Sciences, Istanbul Gelisim University, Istanbul, Turkey
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Mohamed AA, Gupta P, Patel P, Burns A, Saeed M, Lane D, Seidu S, Khunti K. P6187High rates of non-adherence to antidiabetic, antihypertensive and lipid lowering treatment in patients with Type 2 diabetes revealed by liquid chromatography-tandem mass spectrometry urine analysis. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A A Mohamed
- University Hospitals of Leicester NHS Trust, Leicester, United Kingdom
| | - P Gupta
- University Hospitals of Leicester NHS Trust, Leicester, United Kingdom
| | - P Patel
- University Hospitals of Leicester NHS Trust, Leicester, United Kingdom
| | - A Burns
- University Hospitals of Leicester NHS Trust, Leicester, United Kingdom
| | - M Saeed
- University Hospitals of Leicester NHS Trust, Leicester, United Kingdom
| | - D Lane
- University Hospitals of Leicester NHS Trust, Leicester, United Kingdom
| | - S Seidu
- University of Leicester, Leicester, United Kingdom
| | - K Khunti
- University of Leicester, Leicester, United Kingdom
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Saad DY, Soliman MM, Mohamed AA, Youssef GB. Protective effects of sea cucumber (Holothuria atra) extract on testicular dysfunction induced by immune suppressant drugs in Wistar rats. Andrologia 2018; 50:e13017. [PMID: 29687464 DOI: 10.1111/and.13017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2018] [Indexed: 12/12/2022] Open
Abstract
The current study was aimed to evaluate the protective effect of Holothurian atra (HA) extract; naturally occurring marine resource, against methotrexate (MTX) induced testicular dysfunction. Mature rats received either MTX (20 mg/kg, intraperitoneally) or saline on the 7th day of experiment al design. Seven days prior and after MTX-injection, rats received HA at dose of 300 mg/kg intragastrically (HA + MTX group; HA group alone). Serum was extracted and testicular tissues were examined for the changes in serum biochemistry (liver & kidney biomarkers, testicular hormones and antioxidants), molecular and histopthological alterations using RT-PCR and immunohistochemistry. MTX-injected rats induced alteration in all testicular parameters. Prior administration of HA ameliorated the MTX-induced oxidative stress. HA administration normalised MTX-induced decrease in serum levels of interleukin-6 (IL-6), tumour necrosis factor alpha (TNF-α), interferon-gamma (IFN-γ), reproductive hormones (FSH, LH and testosterone) and antioxidants GST, SOD and catalase. MTX-injected rats down-regulated mRNA expression of GST, SOD, steroidogenesis associated genes, IFN-γ, Bcl2 and NFKB. MTX up-regulated BAX expression and caspase 9 immunoreactivity that were ameliorated in HA + MTX group. Collectively, HA ameliorated and restored all altered genes. In conclusion, HA is a promising supplement that is helpful in protection against testicular cytotoxicity and dysfunction induced by methotrexate.
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Affiliation(s)
- D Y Saad
- Faculty of Applied Medical Sciences, Medical Laboratory Department, Taif University, Turabah, Saudi Arabia.,Faculty of Science, Biology Department, Cairo University, Cairo, Egypt
| | - M M Soliman
- Faculty of Applied Medical Sciences, Medical Laboratory Department, Taif University, Turabah, Saudi Arabia.,Faculty of Veterinary Medicine, Biochemistry Department, Benha University, Benha, Egypt
| | - A A Mohamed
- Faculty of Science, Biology Department, Taif University, Taif, Saudi Arabia.,Department of Animal Reproduction and AI, Veterinary Research Division, National Research Center, Giza, Egypt
| | - G B Youssef
- Faculty of Veterinary Medicine, Forensic Medicine and Toxicology Department, Benha University, Benha, Egypt
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El-Malky MM, Mowafy NM, Zaghloul DA, Al-Harthi SA, El-Bali MA, Mohamed RT, Bakri RA, Mohamed AA, Elmedany S. Prevalence of Cryptosporidium species isolated from diarrheic children in Makkah, Saudi Arabia. Trop Biomed 2018; 35:76-81. [PMID: 33601779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Cryptosporidiosis has been identified as a significant underlying cause of morbidity and mortality worldwide. Studies in high and low income countries have recognized the importance of Cryptosporidium as a cause of diarrhea. The objectives of the current study were to determine the prevalence rate and genotypes of Cryptosporidiumin in diarrheic children in Makkah Region. A total of 1,380 fecal samples were collected from children aged up to 14 years attending 3 major hospitals of Makkah between March 2015 and March 2016. Stool collected were subjected to direct microscopic examination and crypto antigen detection using ImmunoCard STAT, Cryptosporidium/Giardia rapid test. Part of each positive stool sample was kept frozen at -20ºC for molecular characterization. Initial screening by immunochromatographic detection kit revealed 23 positive cases. PCR was performed for positive cases by amplification of a piece of the gene encoding the small (18S) subunit of rRNA producing a 435-438 bp product. Cryptosporidium genotyping was performed by RFLP analysis of PCR products. Genotyping revealed 18 cases C. hominis genotype, 4 cases C. parvaum genotype and one sample failed to be amplified. The data revealed a higher incidence of the common human species C. hominis (81.8%). The detection of both C. hominis and C. parvaum genotypes point to the possibility of both anthroponotic and zoonotic transmission routes occurring in Makkah region. Further studies are needed to verify the subgenotypes of Cryptosporidium to elucidate the real transmission modes and hence plan for effective control strategies.
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Affiliation(s)
- M M El-Malky
- Department of Medical Parasitology, Faculty of Medicine, Umm AL-Qura University, Makkah, Kingdom of Saudi Arabia
- Department of Medical Parasitology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - N M Mowafy
- Department of Medical Parasitology, Faculty of Medicine, Umm AL-Qura University, Makkah, Kingdom of Saudi Arabia
- Department of Medical Parasitology, Faculty of Medicine, Minia University, El-Minia, Egypt
| | - D A Zaghloul
- Department of Medical Parasitology, Faculty of Medicine, Assuit University, Assuit, Egypt, Laboratory and Blood Bank Department, Al-Noor Specialist Hospital, Makkah, Saudi Arabia
| | - S A Al-Harthi
- Department of Medical Parasitology, Faculty of Medicine, Umm AL-Qura University, Makkah, Kingdom of Saudi Arabia
| | - M A El-Bali
- Department of Medical Parasitology, Faculty of Medicine, Umm AL-Qura University, Makkah, Kingdom of Saudi Arabia
| | - R T Mohamed
- Department of Medical Parasitology, Faculty of Medicine, Umm AL-Qura University, Makkah, Kingdom of Saudi Arabia
- Department of Medical Parasitology, Faculty of Medicine, Minia University, El-Minia, Egypt
| | - R A Bakri
- Department of Medical Parasitology, Faculty of Medicine, Umm AL-Qura University, Makkah, Kingdom of Saudi Arabia
| | - A A Mohamed
- Department of Medical Parasitology, Faculty of Medicine, Umm AL-Qura University, Makkah, Kingdom of Saudi Arabia
- Department of Medical Parasitology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - S Elmedany
- Department of Rheumatology and Rehabilitation, Faculty of Medicine, Tanta University, Egypt
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Ahmed MA, Brick AA, Mohamed AA. An efficient adsorption of indigo carmine dye from aqueous solution on mesoporous Mg/Fe layered double hydroxide nanoparticles prepared by controlled sol-gel route. Chemosphere 2017; 174:280-288. [PMID: 28183053 DOI: 10.1016/j.chemosphere.2017.01.147] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 01/10/2017] [Accepted: 01/31/2017] [Indexed: 06/06/2023]
Abstract
A new approach for removal of indigo carmine blue (IC) dye which is extensively used in jeans manufacture was successfully performed on novel mesoporous [LDH] nanoparticles prepared by sol-gel route using CTAB as shape and pore directing agent. The physicochemical features were monitored by X-ray diffraction (XRD), Fourier transformer infra-red (FTIR), N2 adsorption-desorption isotherm, Field emission electron microscope (FESEM) and high resolution transmission electron microscope (HRTEM). The influence of reaction parameters affecting dye adsorption including contact time, initial dye concentration, pH and temperature were investigated. Textural analysis and HRTEM images indicate the existence of mesoporous spherical nanoparticles of size = 26 nm connected to each other's and embedded large numbers of mesopores of average pore radius = 43.5 Å. A successful adsorption of IC on LDH nanoparticles of surface area = 85.6 m2/g at various pH with maximum adsorption capacity = 62.8 mg/g at pH = 9.5. Langmuir model is more favorable to describe the adsorption of IC rather than Freundlich model which reflecting the preferential formation of monolayer on the surface of LDH. Both film diffusion and the intraparticle diffusion affect the dye adsorption. The values of enthalpy change (ΔH) for and (ΔS) are + 28.18 and + 0.118 kJ/mol, respectively indicating that the removal process is endothermic. The results indicated that LDH nanoparticles conserved a good activity even after five consecutive cycles of reuse. Our results suggest that mesoporous LDH nanoparticles are considered a potential novel adsorbent for remediation of wastewater containing IC.
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Affiliation(s)
- M A Ahmed
- Chemistry Department, Faculty of Science, Ain Shams University, Egypt.
| | - A A Brick
- Chemistry Department, Faculty of Science, Ain Shams University, Egypt
| | - A A Mohamed
- Chemistry Department, Faculty of Science, Ain Shams University, Egypt
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Elkady EF, Tammam MH, Mohamed AA. Development and Validation of an RP-HPLC Method for the Determination of Vinpocetine and Folic Acid in the Presence of a Vinpocetine Alkaline Degradation Product in Bulk and in Capsule Form. J AOAC Int 2017; 100:671-676. [PMID: 28074742 DOI: 10.5740/jaoacint.16-0239] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 11/17/2022]
Abstract
An alkaline-forced degradation hydrolytic product of vinpocetine was prepared and characterized by 1H-NMR, FTIR spectroscopy, and MS. Subsequently, a simple, selective, and validated reversed-phase HPLC method was developed for the simultaneous estimation of vinpocetine and folic acid in the presence of a vinpocetine alkaline degradation product. Chromatographic separation was achieved using an isocratic mobile phase consisting of acetonitrile-0.02 M KH2PO4 [containing 0.2% (v/v) triethylamine and adjusted to pH 6 with orthophosphoric acid; (80 + 20, v/v)] at a flow rate of 0.9 mL/min at ambient temperature on a Eurospher II C18 (250 × 4.6 mm, 5 μm) column, with UV detection at 280 nm for folic acid and 230 nm for vinpocetine and its alkaline hydrolytic product. Linearity, accuracy, and precision were found to be acceptable over a concentration range of 12.5-200 μg/mL for vinpocetine and 1-16 μg/mL for folic acid. The proposed method was successfully applied for the determination of both drugs and a vinpocetine hydrolysis product in a laboratory-prepared mixture and in a capsule containing both drugs.
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Affiliation(s)
- Ehab F Elkady
- Cairo University, Faculty of Pharmacy, Pharmaceutical Chemistry Department, Kasr El-Aini St, Cairo 11562, Egypt
| | - Marwa H Tammam
- National Organization for Drug Control and Research, 6-Abu Hazem St, Pyramids Ave, Giza 35521, Egypt
| | - Ayman A Mohamed
- National Organization for Drug Control and Research, 6-Abu Hazem St, Pyramids Ave, Giza 35521, Egypt
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Salem RA, Darweesh EI, Wanis MA, Mohamed AA. Evaluation of the effects of intrathecal bupivacaine-dexmedetomidine for lumbar spine fusion: a double blinded randomized controlled study. Eur Rev Med Pharmacol Sci 2015; 19:4542-4548. [PMID: 26698250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To evaluate the efficacy of intrathecal dexmedetomidine at improving the quality of the operative field, and prolonging the duration of sensory block, motor block, and postoperative analgesia during spinal surgery PATIENTS AND METHODS This prospective, double-blinded, randomized controlled study included 52 patients undergoing an instrumented one-level posterolateral lumbar spine fusion for lumbar spondylolisthesis under spinal anesthesia. The patients were randomized into two groups: group D (n = 26) received 15 mg of hyperbaric bupivacaine with 5 μg of dexmedetomidine, while group P (n = 26) received 15 mg of hyperbaric bupivacaine only. The operative field quality score, blood loss volume, and the surgeon's satisfaction with the procedure were recorded. The onset time of the sensory block, time to reach peak sensory level, sensory and motor regression times, time to the first requirement of analgesia, sedation level, hemodynamics, and all postoperative complications were also recorded. RESULTS The operative field quality and the surgeon's satisfaction scores (rated excellent) were significantly better in group D than in group P (p < 0.0001 and p = 0.003, respectively). Patients in group D had significantly longer sensory and motor regression times than patients in group P (p < 0.0001). The time to the first requirement of analgesia and the total dose of ketorolac was significantly longer and smaller, respectively, in group D than in group P (p < 0.0001). CONCLUSIONS Intrathecal bupivacaine-dexmedetomidine improved the quality of the operative field, prolonged the duration of the sensory and motor block, prolonged postoperative analgesia, and produced minimal side effects.
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Affiliation(s)
- R A Salem
- Departments of Anesthesiology and 2Departments of Orthopedics, Sohag Faculty of Medicine, Sohag University, Sohag, Egypt.
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Mohamed AA, Attia AR, Abdelfattah MM. Hemodynamic Effects of Sevoflurane versus Dexmedetomidine. BMB 2014. [DOI: 10.12816/0008108] [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: 11/27/2022]
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Mohamed AA, Sabry NA, Abbassi MM, Ibrahim WA, Ali-Eldin ZA. Vitamin D levels in Egyptian HCV patients (genotype 4) treated with pegylated interferon. Acta Gastroenterol Belg 2013; 76:38-44. [PMID: 23650781] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND/AIM Vitamin D has been shown to play an important immunomodulatory role. Deficiency of vitamin D has been recently associated to the lack of response to interferon therapy in Hepatitis C virus genotype 1 infected patients. This study aims to evaluate serum level of vitamin D and verify whether circulating vitamin D has any independent role in predicting the rates of HCV virologic response after the administration of pegylated interferon to Egyptian patients infected with genotype 4 HCV. METHODS Fifty patients infected with HCV genotype 4 and not co-infected with neither Hepatitis B virus nor Human Immunodeffiency Virus were recruited for the study. They were treated with ribavirin-pegylated interferon alpha 2a. Viral titer was determined at baseline, at 12 weeks and at end of treatment (48 weeks). Vitamin D levels and a biochemical profile were obtained for the patients at baseline and at end of treatment. Vitamin D control group consisting of 20 healthy patients of similar age and weight to the study group were recruited to obtain vitamin D levels. RESULTS Vitamin D levels in HCV infected patients were significantly lower than in healthy subjects. Responders to ribavirin plus pegylated interferon alpha 2a therapy had significantly higher vitamin D levels than non-responders. CONCLUSION Vitamin D deficiency predicts an unfavorable response to interferon-based treatment of HCV.
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Affiliation(s)
- A A Mohamed
- Biochemistry Department, National Hepatology and Tropical Medicine Research Institute
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Tarbeeh GA, Mohamed AA. Effects of intrathecal bupivacaine–fentanyl versus bupivacaine–dexmedetomidine in diabetic surgical patients. Egyptian Journal of Anaesthesia 2013. [DOI: 10.1016/j.egja.2012.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Gehan A. Tarbeeh
- Department of Anesthesia and Surgical Intensive Care, Faculty of Medicine , Mansoura University, Mansoura, Egypt
| | - Ayman A. Mohamed
- Department of Anesthesia and Surgical Intensive Care, Faculty of Medicine , Mansoura University, Mansoura, Egypt
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Eid MM, Helmy NA, Omar IM, Mohamed AA, El Sewefy D, Fadel IM, Helal RA. Clinical significance of telomerase genes (hTERC and hTERT) amplification in patients with acute myeloid leukemia. Gulf J Oncolog 2013; 1:51-60. [PMID: 23339981] [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] [Accepted: 12/01/2012] [Indexed: 06/01/2023]
Abstract
UNLABELLED Acute myeloid leukemia (AML) describes a heterogenous group of hematological disorders. Cytogenetic and molecular assays have allowed patients' follow up aiming for detection of minimal residual disease, prediction of patients' outcome, in addition to providing the rationale for designing novel molecular-targeted therapeutic strategies. Human telomerase reverse transcriptase (hTERT), encoded by the hTERT gene and the telomerase RNA component (hTERC) genes are frequently amplified in human tumors, which may indicate that the hTERT and the hTERC genes may be target for amplification during the transformation of human malignancies including hematological malignancies. This genetic event has implications in diagnosis, prognosis and therapeutics of cancer. To evaluate the hTERC and hTERT genes as a prognostic marker in patients with AML, hTERC and hTERT gene amplification was studied in 20 adult AML patients using a commercial FISH probes (Kreatech) designated to detect the copy numbers of the genes. They were 12 males and 8 females. Their ages ranged from 16 to 67 years. The patients were further divided into two groups; group I (12 patients) includes newly diagnosed AML patients and group II (8 patients) includes patients taken at 28th day of chemotherapy. The hTERC amplification was detected in 19/21 cases (90.5%). The copy number of the gene ranged from 2-5 copies per interphase cell. For the hTERT gene, the amplification was found in the same percent of the patients. The copy number of the gene ranged from 2-9 copies per interphase cell. On comparing the group I with group II there was a highly statistical significant difference regarding the percent of amplification of both genes. The percent of amplification of hTERT gene was found to be higher among patients with poor outcome of the disease than in patients with good outcome. On the contrary the hTERC gene amplification did not exhibit such a correlation. In conclusion, hTERT and hTERC genes amplification were detected in patients with AML; therefore telomerase can be a good cancer marker which may be involved in carcinogenesis of leukemia. Higher amplification was found in de novo cases than cases in remission which emphasize its role in clinical analysis, disease monitoring and detection of minimal residual disease. KEYWORDS Acute Myeloid leukemia, telomerase amplification, hTERC gene, hTERT gene.
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Affiliation(s)
- M M Eid
- Human Cytogenetics Department, National Research Center, Cairo Egypt. Tel. +20105003576
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Mohamed AA, Tarbeeh GA, Shouman O. Efficacy of different doses of atracurium on intubating conditions of burned patients. Egyptian Journal of Anaesthesia 2012. [DOI: 10.1016/j.egja.2012.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Affiliation(s)
- Ayman A. Mohamed
- Department of Anesthesia and Surgical Intensive Care, Faculty of Medicine , Mansoura University , Egypt
| | - Gehan A. Tarbeeh
- Department of Anesthesia and Surgical Intensive Care, Faculty of Medicine , Mansoura University , Egypt
| | - Omar Shouman
- Department of Burn, Plastic and Reconstructive Surgery , Faculty of Medicine , Mansoura University , Egypt
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Abstract
Mitral regurgitation (MR) is defined as the loss of the smooth and adequate trimming closure of the mitral valve, which results in the reflux of blood from the left ventricle into the left atrium during systole. The functional competence of the mitral valve relies on the proper and coordinated interaction of the following structures: the mitral annulus, and leaflets, chordate tendineae, papillary muscles, left atrium and the left ventricles. This article will describe the echocardiography assessment of the mitral valve regurgitation with special emphasis on the trans-esophageal and 3D echocardiography. The echocardiography images were all original with special attention to the unique surgical view of the images.
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Affiliation(s)
- A S Omran
- Department of Cardiac Sciences. King Abdulaziz Cardiac Center, National Guard Health Affairs, Saudi Arabia
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Abstract
Echocardiography plays a major role in diagnosis, etiology and severity of Mitral Stenosis (MS), analysis of valve anatomy and decision-making for intervention. This technique has also a crucial role to assess consequences of MS and follow up of patients after medical or surgical intervention. In this article we review the role of conventional echocardiography in assessment of mitral stenosis and future direction of this modality using 3D echocardiography.
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Affiliation(s)
- A S Omran
- Department of Cardiac Sciences, King Abdulaziz Cardiac Center, National Guard Health Affairs, Saudi Arabia
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Awadalla HI, Kamel EG, Mahfouz EM, Mohamed AA, El-Sherbeeny AM. Determinants of maternal adaptation to mentally disabled children in El Minia, Egypt. East Mediterr Health J 2010; 16:759-764. [PMID: 20799533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This study was carried out in a governmental school for mentally disabled children in El Minia. We assessed maternal adaptation and the relationship between maternal sociodemographic factors and adaptation as well as examining maternal distress. All 100 mothers with children aged 6-18 years attending the school were recruited in the study. Three tools were used: demographic data sheet, adaptation scale to assess the nature of mothers' interaction and patterns of psychosocial adaptation and depression scale to detect the presence of psychiatric disorders among the mothers. Only 35.0% of the mothers adapted positively to their child's condition; 62.9% of those had female children. Negatively adapted mothers were slightly older than positively adapted mothers and had more children. Maternal education and occupation were significantly associated with psychosocial adaptation. Knowledge of mothers about their child's condition significantly affected adaptation as well as the dependency of children in eating, drinking and sleeping. Two-thirds of mothers had high levels of psychopathology.
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Affiliation(s)
- H I Awadalla
- Institute of Environmental Studies and Research, Ain Shams University Cairo, Egypt.
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Furusato B, Tan SH, Young D, Dobi A, Sun C, Mohamed AA, Thangapazham R, Chen Y, McMaster G, Sreenath T, Petrovics G, McLeod DG, Srivastava S, Sesterhenn IA. ERG oncoprotein expression in prostate cancer: clonal progression of ERG-positive tumor cells and potential for ERG-based stratification. Prostate Cancer Prostatic Dis 2010; 13:228-37. [PMID: 20585344 PMCID: PMC3010744 DOI: 10.1038/pcan.2010.23] [Citation(s) in RCA: 193] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Gene fusions prevalent in prostate cancer (CaP) lead to the elevated expression of the ERG proto-oncogene. ERG activation present in 50–70% of prostate tumors underscores one of the most common oncogenic alterations in CaP. Despite numerous reports of gene fusions and mRNA expression, ERG oncoprotein status in CaP still remains to be defined. Furthermore, development of ERG protein-based assays may provide a new dimension to evaluation of gene fusions involving diverse androgen-regulated promoters and the ERG protein-coding sequence. Through exhaustive evaluations of 132 whole-mount prostates (261 tumor foci and over 200 000 benign glands) for the ERG oncoprotein nuclear expression, we demonstrated 99.9% specificity for detecting prostate tumor cells using a highly specific anti-ERG monoclonal antibody. The ERG oncoprotein expression correlated well with fusion transcript or gene fusion in randomly selected specimens. Strong concordance of ERG-positive foci of prostatic intraepithelial neoplasia (PIN) with ERG-positive carcinoma (82 out of 85 sections with PIN, 96.5%) affirms the biological role of ERG in clonal selection of prostate tumors in 65% (86 out of 132) of patients. Conversely, ERG negative PINs were associated with ERG-negative carcinoma. Taken together, the homogeneous and strong ERG expression detected in individual tumors establishes the potential for ERG oncoprotein-based stratification of CaP.
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Affiliation(s)
- B Furusato
- Department of Genitourinary Pathology, Armed Forces Institute of Pathology, Washington, DC, USA
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Mustafa HS, Malik EM, Tuok HT, Mohamed AA, Julla AI, Bassili A. Malaria preventive measures, health care seeking behaviour and malaria burden in different epidemiological settings in Sudan. Trop Med Int Health 2009; 14:1488-95. [PMID: 19788718 DOI: 10.1111/j.1365-3156.2009.02394.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To provide information about preventive measures and treatment seeking behaviour as well as an estimate of the malaria burden in different epidemiological settings for effective monitoring and evaluation of the ongoing efforts. METHODS Cross-sectional survey carried out in four areas representing different levels of transmission to explore the use of preventive measures, care-seeking behaviour and accessibility in addition to point prevalence was followed by a follow-up phase in which the health workers registered and reported all fever cases including malaria. The relation between the reported malaria incidence, the product of symptomatic/asymptomatic ratio and the prevalence of confirmed malaria cases was used to develop the equation that could predict the true malaria incidence. RESULTS Thousand households and 3628 individuals were surveyed. The presence of any net varied between 6.6% and 40%; the percentage of people who reportedly slept under mosquito nets in the previous night varied between 35 and 80. Prompt use of medications ranged between 14 and 48% with a delay of more than 24 h noticed in different areas. The mean number of individuals per household who reported use of anti-malarial drugs in the last 2 weeks ranged between 0.6 (SD = 0.92) and 1.2 (SD = 1.1), with variable cost per treatment and affordability. The prevalence of asymptomatic parasitaemia, fever and confirmed malaria at time of the survey differed by area. The incidence of malaria during the follow-up period was estimated to be 8.5, 178.6, 23.7 and 10.3 episodes per 1000 population in Malakal, Elrank, Elhosh and El Matama, respectively. Based on this, a prediction equation was developed. CONCLUSION We found suboptimal health care seeking behaviour, coverage and use of preventive measures with a high malaria burden. We developed a model for future estimation of malaria episodes.
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Affiliation(s)
- H S Mustafa
- Faculty of Medicine, University of Khartoum, Khartoum, Sudan
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Mohamed AA. Study of larvivorous fish for malaria vector control in Somalia, 2002. East Mediterr Health J 2003; 9:618-26. [PMID: 15748059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
An intervention study was conducted on the introduction of the larvivorous fish Oreochromis spilurus spilurus as a method of malaria vector control in Kalabeydh village, northern Somalia. This species is resistant to chlorine in water up to a concentration of 1.0 mg/L. Fish were introduced into 25 berkit (reservoirs). After 1 month the number of larvae in each berkit was reduced by between 16.5% and 78.6% (mean 52.8%). Community acceptance and participation was good. The introduction of larvivorous fish is a cheap method of malaria vector control, but its sustainability needs special consideration and education of the community is important, especially to cover the dry season, when most of the berkit dry up.
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Affiliation(s)
- A A Mohamed
- Ministry of Health and Labour, Hargeisa, Somalia
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Azab ME, El-Sherif EA, Abdel-Mawla MM, Bishara SA, Mikhail EM, Mohamed AA. Study of factors affecting growth of Leishmania in cultures. J Egypt Soc Parasitol 2003; 29:261-73. [PMID: 12561905] [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: 02/28/2023]
Abstract
The rate of growth of Leishmania major and L. infantum in El-On's culture media supplemented with human, dog, rat and avian blood was studied in vitro. Rabbit blood was used as a control. The effect of culture with these types of blood on the infectivity of both Leishmania strains to albino mice was also studied. The results showed that a good yield of both L. major and L. infantum parasites can be obtained in culture by using avian blood as substitute for rabbit blood in El-ON's medium. In addition, rat blood gave good results with L. infantum. The morphological forms of L. major and L. infantum on all types of blood supplemented media: elongated promastigotes, spindle promastigotes, paramastigotes and amastigoes were present all through the culture period with variable percentages. The infectivity to experimental animals was not affected by culture of both Leishmania strains on rabbit, human, rat, dog as well as avian blood supplemented media.
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Affiliation(s)
- M E Azab
- Department of Parasitology, Faculty of Medicine, Ain Shams University, Cairo 11566
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Mohamed AA, Avila JG, Schültke E, Kamencic H, Skihar V, Obayan A, Juurlink BHJ. Amelioration of experimental allergic encephalitis (EAE) through phase 2 enzyme induction. Biomed Sci Instrum 2002; 38:9-13. [PMID: 12085664] [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: 02/25/2023]
Abstract
The multiple sclerosis (MS) lesion is characterized by an inflammatory cell mediated attack on white matter. Oxidative stress appears to play a role in the onset and progression of MS. We reasoned that decreasing oxidative stress might ameliorate MS. One way of decreasing oxidative stress is to induce phase 2 enzymes. The model chosen to test this hypothesis was experimental allergenic encephalomyelitis (EAE) induced in the Lewis rat. The 26 animals were placed into two groups: 1) those on normal rat chow, 2) those on rat chow containing 250 mumoles t-butylhydroxyanisole (BHA)/kg. After 2 weeks, animals were administered 100 micrograms guinea pig myelin basic protein and examined daily in a blinded fashion. Twenty-nine days later, animals were sacrificed, blood collected for glutathione (GSH) measurements and tissues collected for histology. Six of the 13 control chow animals developed hindlimb weakness or paralysis while 5 developed tail weakness only. Only 1 BHA fed animal exhibited symptoms--hindlimb weakness. Clinical symptoms correlated well with the extent of perivascular lymphocyte infiltration. Animals with BHA in the diet had 20% higher red cell GSH indicting induction of phase 2 enzymes. We conclude that dietary phase 2 enzyme inducers should be examined for their ability to ameliorate MS.
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Affiliation(s)
- A A Mohamed
- Department of Anatomy & Cell Biology, University of Saskatchewan, Saskatoon, SK, Canada
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Jupp OJ, McFarlane SM, Anderson HM, Littlejohn AF, Mohamed AA, MacKay RH, Vandenabeele P, MacEwan DJ. Type II tumour necrosis factor-alpha receptor (TNFR2) activates c-Jun N-terminal kinase (JNK) but not mitogen-activated protein kinase (MAPK) or p38 MAPK pathways. Biochem J 2001; 359:525-35. [PMID: 11672426 PMCID: PMC1222173 DOI: 10.1042/0264-6021:3590525] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The pleitropic actions of tumour necrosis factor-alpha (TNF) are transmitted by the type I 55 kDa TNF receptor (TNFR1) and type II 75 kDa TNF receptor (TNFR2), but the signalling mechanisms elicited by these two receptors are not fully understood. In the present study, we report for the first time subtype-specific differential kinase activation in cell models that respond to TNF by undergoing apoptotic cell death. KYM-1 human rhabdomyosarcoma cells and HeLa human cervical epithelial cells, engineered to overexpress TNFR2, displayed c-Jun N-terminal kinase (JNK) activation by wild-type TNF, a TNFR1-specific TNF mutant and a TNFR2-specific mutant TNF in combination with an agonistic TNFR2-specific monoclonal antiserum. A combination of the TNFR2-specific mutant and agonistic antiserum elicited maximal endogenous or exogenous TNFR2 responsiveness. Moreover, alternative expression of a TNFR2 deletion mutant lacking its cytoplasmic domain rendered the cells unable to activate JNK activity through this receptor subtype. The profile of JNK activation by TNFR1 was more transient than that of TNFR2, with TNFR2-induced JNK activity also being more sensitive to the caspase inhibitor, benzyloxycarbonyl-Val-Ala-DL-Asp-fluoromethylketone. Conversely, only activation of the TNFR1 could stimulate mitogen-activated protein kinase (MAPK) or p38 MAPK activities in a time-dependent manner. The role of TNFR2 activation in enhanced apoptotic cell death was confirmed with agonistic monoclonal antisera in cells expressing high levels of TNFR2. Activation of TNFR2 alone elicited cell death, but full TNF-induced death required stimulation of both receptor types. These findings indicate that efficient activation of TNFR2 by soluble TNFs is achievable with co-stimulation by antisera, and that both receptors differentially modulate extracellular signal-regulated kinases contributing to the cytokine's cytotoxic response.
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Affiliation(s)
- O J Jupp
- Department of Biomedical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, United Kingdom
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Abstract
Tumour necrosis factor-alpha (TNF) has a variety of cellular effects including apoptotic and necrotic cytotoxicity. TNF activates a range of kinases, but their role in cytotoxic mechanisms is unclear. HeLa cells expressing elevated type II 75 kDa TNF receptor (TNFR2) protein, analysed by flow cytometry and Western analysis, showed altered c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinase (p38MAPK; but not MAPK) protein content and activation. There was greater JNK activation, but reduced p38MAPK activation in dying cells compared to those still to enter TNF-induced apoptosis. Moreover, cells displaying more rapid apoptosis possess higher levels of type I 55 kDa TNFR1 receptor isoform, but less TNFR2. These findings reveal differential kinase activation in TNF-induced apoptotic death.
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Affiliation(s)
- M J Helms
- Department of Biomedical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
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Mohamed AA, Fawy KF. Catalytic spectrophotometric determination of vanadium in seawaters based on the bromate oxidative coupling reaction of metol and 2,3,4-trihydroxybenzoic acid. ANAL SCI 2001; 17:769-73. [PMID: 11707949 DOI: 10.2116/analsci.17.769] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new, simple, sensitive and selective catalytic method is developed for the determination of vanadium in natural and sea waters. The method is based on the catalytic effect of V(V) and/or V(IV) on the bromate oxidative-coupling reaction of metol with 2,3,4-trihydroxybenzoic acid (THBA). The reaction is followed spectrophotometrically by tracing the oxidation product at 380 and/or 570 nm after 5 min of mixing the reagents. The optimum reaction conditions are 6.4 x 10(-3) mol l-1 of metol, 2.0 x 10(-3) mol l-1 of THBA and 0.16 mol l-1 of bromate at 35 degrees C and in the presence of an activator-buffer solution of 1 x 10(-2) mol l-1 of tartrate (pH = 3.10). Following the recommended procedure, V(V) and/or V(IV) can be determined with linear calibration graphs up to 0.75 ng ml-1 and detection limits, based on the 3Sb criterion, of 0.008 and 0.018 ng ml-1 at 380 and 570 nm, respectively. The developed method was successfully applied, without any separation or preconcentration processes, to the determination of vanadium in natural and seawaters following the direct calibration and standard addition techniques, respectively.
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Affiliation(s)
- A A Mohamed
- Department of Chemistry, Faculty of Science, Ain Shams University, Abbassia, Cairo-11566, Egypt.
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Gaffar MA, Al-Houty LI, Al-Muraikhi M, Mohamed AA. The effect on the polarisation and piezoelectricity of triglycine sulphate crystals of doping with some divalent and trivalent ions. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/21/9/021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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
AIM To re-survey the Gambia after an interval of 10 years to assess the impact of a national eye care programme (NECP) on the prevalence of blindness and low vision. METHOD Comparison of two multistage cluster random sample surveys taking into account the marked increase in population in the Gambia, west Africa. Samples of the whole population in 1986 and 1996 were taken. The definition of blindness is presenting vision less than 3/60 in the better eye, or visual fields constricted to less than 10 degrees from fixation. Low vision is less than 6/18 but 3/60 or better. Causes of blindness were determined clinically by three ophthalmologists. RESULTS The crude prevalence of blindness fell from 0.70% to 0.42%, a relative reduction of 40%. During the same 10 year period, the population increased by 51% from 775 000 to 1 169 000. When the results were standardised for age, a west to east gradient was found for changes in risk of blindness over the 10 year period. This matched the phased west to east introduction of the NECP interventions. There was a modest but significant increase in the risk of low vision across the whole country. CONCLUSIONS The overall reduction in risk of blindness, in those areas where the NECP has been active, appears to justify the programme and the support of donor organisations. The low vision cases due to cataract must now be addressed.
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Affiliation(s)
- H Faal
- National Eye Care Programme, Ministry of Health, Banjul, Gambia
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Sawan ZM, Mohamed AA, Sakr RA, Tarrad AM. Effect of kinetin concentration and methods of application on seed germination, yield components, yield and fiber properties of the Egyptian cotton (Gossypium barbadense). Environ Exp Bot 2000; 44:59-68. [PMID: 10927129 DOI: 10.1016/s0098-8472(00)00054-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Two field experiments in 1993 and 1994 as well as a laboratory germination experiment were conducted on the Egyptian cotton cultivar Giza 75 (Gossypium barbadense) to determine the effect of six concentrations of kinetin (6-furfurylaminopurine) ranging from 0 to 10.0 mg l(-1) and three different methods of application: (A) seeds were soaked for 24 h before germination (laboratory experiment) or sowing (field experiment) in solutions of different kinetin concentration, (B) cotton plants were sprayed twice with different kinetin concentrations at 60 and 75 days after sowing (DAS) during the square initiation and the beginning of bolling stages, at volume solution of 480 l ha(-1). (C) Seeds were soaked in kinetin solutions before sowing as method A. In addition cotton plants were sprayed twice as method B with the same kinetin concentrations. Kinetin application improved seed viability and seedling vigour as shown by lengths of the hypocotyl, radicle and the entire seedling, as well as seedling fresh weight. Moreover, significant increases were recorded in the number of open bolls/plant, boll weight, lint and seed indices, seed cotton yield/plant, and seed cotton and lint yields/plot. The highest means were obtained at 5 mg kinetin l(-1) concentration and under method C of application. Treatments generally, had no significant effects on lint percentage, yield earliness and fiber properties. These results show that, the use of kinetin at 5 mg l(-1) for pre-soaking seeds before planting and spraying cotton plants at 60 and 75 DAS with the same concentration could improve cotton germination, seed cotton and lint yields.
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Affiliation(s)
- ZM Sawan
- Cotton Research Institute, Agricultural Research Center, Ministry of Agriculture & Land Reclamation, 9 Gamaa Street, 12619, Giza, Egypt
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