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Yousef, A. A., F. Y. Mohamed, N. F. Boraey, N. E. Akeel, A. A. Soliman, N. M. Waked, M. I. A. Hashem, H. Shehata, D. S. Fahmy, and A. Ismael, "Association of Plasminogen Activator Inhibitor 1 (PAI-1) 4G/5G Polymorphism and Susceptibility to SLE in Egyptian Children and Adolescents: A Multicenter Study [Corrigendum]", Journal of Inflammation Research, vol. 14: Dove Press, pp. 265-266, 2021. Abstract
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Yousry, S. M., Y. Sedky, and A. Sobieh, "Association of IL-4 (intron 3) and IL-10 (-1082) gene polymorphisms with risk of mitral valve disease in children with rheumatic heart disease", Cardiology in the young: Cambridge Univ Press, pp. 1–7, 2015. Abstract
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Yousry, M., A. Kamel, and O. Hegazi, "Aligning Organization Measurements with Organization Strategic Goals", The Egyptian Computer Journa, vol. 37, issue 2, 2009.
Yousry, S. M., Y. Sedky, and A. Sobieh, "Association of IL-4 (intron 3) and IL-10 (-1082) gene polymorphisms with risk of mitral valve disease in children with rheumatic heart disease", Cardiology in the Young, vol. 26, issue 7: Cambridge University Press, pp. 1290, 2016. Abstract
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Yousry, S. M., Y. Sedky, and A. Sobieh, "Association of IL-4 (intron 3) and IL-10 (-1082) gene polymorphisms with risk of mitral valve disease in children with rheumatic heart disease", Cardiology in the Young, vol. 26, issue 7: Cambridge University Press, pp. 1290-1296, 2016. Abstract
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Yousry, S. M., Y. Sedky, and A. Sobieh, "Association of IL-4 (intron 3) and IL-10 (-1082) gene polymorphisms with risk of mitral valve disease in children with rheumatic heart disease.", Cardiology in the young, pp. 1-7, 2015 Oct 28. Abstract

Aim Rheumatic heart disease is an inflammatory disease of cardiac tissue. The underlying pathogenic mechanisms highlight a complex interplay of immunological, genetic, and environmental factors. The aim of the present study was to investigate whether IL-4 (intron 3) and IL-10 (-1082) gene polymorphisms could be associated with susceptibility and/or severity of rheumatic heart disease among patients from the Egyptian population. Materials and methods A cohort of 140 Egyptian children with rheumatic heart disease and 100 healthy controls were enrolled in this case-control study. Genotyping for IL-4 (intron 3) and IL-10 (-1082) gene polymorphisms was carried out for all patients using a polymerase chain reaction-based analysis.

RESULTS: No significant difference in the distribution of genotypes and allelic frequencies between rheumatic heart disease cases and controls for IL-4 (intron 3) (p=0.17; OR 1.07, 95% CI 0.82-3.74) and IL-10 (-1082) (p=0.49; OR 1.03, 95% CI 0.65-2.71) gene polymorphisms was observed. Further categorisation of patients into mitral valve disease and combined valve disease subgroups showed that cases with mitral valve disease have significantly higher frequency of the RP2 allele of IL-4 (intron 3) (p=0.03; OR 2.98, 95% CI 1.93-6.15) and the G allele of IL-10 (-1082) (p=0.04; OR 2.14, 95% CI 1.62-4.95) when compared with controls. Discussion Our study shows that IL-4 (intron 3) and IL-10 (-1082) gene polymorphisms are not significantly associated with susceptibility to rheumatic heart disease, but they might play a role in the pathogenesis of patients with mitral valve disease.

Youssef, G., W. Ammar, Z. Saad, and Yasser Sharaf, "Assessment of left ventricular regional wall motion abnormalities using regional time-volume curves obtained by real time three-dimensional echocardiography", The Egyptian Heart Journal, vol. 70, issue 70, pp. 189-194, 2018.
Youssef, G., Z. Saad, W. Ammar, and Yasser Sharaf, "Assessment of left ventricular regional wall motion abnormalities using regional time-volume curves obtained by real time three-dimensional echocardiography", The Egyptian heart journal, vol. 70, issue 3, pp. 189-194, 2018. 3d_assessment_of_swma.pdf
Youssef, O., H. Anwar, A. G. Mohamed, O. Mansour, I. Gouda, and W. Hamimy, "Axillary Lymph Nodes Retrieval Is Not Affected After Neoadjuvant Chemotherapy for Locally Advanced Breast Cancer", ANNALS OF SURGICAL ONCOLOGY, vol. 17, no. 2: SPRINGER 233 SPRING ST, NEW YORK, NY 10013 USA, pp. S193–S193, 2010. Abstract
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Youssef, D., and N. Solouma, "Accurate Detection of Blood Vessels I mproves the Detection of Exudates in Color Fundus Images", Computer methods and programs in biomedicine, vol. 108, pp. 1052–1061, 2012.
Youssef, M. F., K. M. F. Elsayed, and A. H. Zahran, "Adaptive radio duty cycling in ContikiMAC: Proposal and analysis", Internet of Things (WF-IoT), 2014 IEEE World Forum on: IEEE, pp. 491–495, 2014. Abstract
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Youssef, S. H., M. A. M. Hegazy, D. Mohamed, and A. M. Badawey, Analysis of paracetamol, pseudo-ephedrine andbrompheniramine in comtrex tablets using chemometric methods, : World journal of pharmacy and pharmaceutical sciences, 2017. Abstract
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Youssef, S. H., D. Mohamed, M. A. M. Hegazy, and A. Badawey, "Analytical methods for the determination of paracetamol, pseudoephedrine and brompheniramine in Comtrex tablets", BMC chemistry, vol. 13, issue 1: BioMed Central, pp. 1-15, 2019. Abstract
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Youssef, S. H., D. Mohamed, M. A. M. Hegazy, and A. Badawey, "Analytical methods for the determination of paracetamol, pseudoephedrine and brompheniramine in Comtrex tablets", BMC chemistry, vol. 13, issue 78, pp. 1-15, 2019. bmc_chemistry.pdf
Youssef, A. M., A. M. El-Nakkadi, and A. M. Aboul-Enein, "Amino acid composition of Egyptian poultry muscles", Pakistan J. Sci., , vol. 27, issue Nos. 1-7, pp. 37, 1975.
Youssef, A. H., and M. R. Abonazel, "Alternative GMM Estimators for First-order Autoregressive Panel Model: An Improving Efficiency Approach", Communications in Statistics - Simulation and Computation, vol. 46, issue 4, no. ja, pp. 3112-3128, 2017. AbstractWebsite

This paper considers first-order autoregressive panel model which is a
simple model for dynamic panel data (DPD) models. The generalized
method of moments (GMM) gives efficient estimators for these models.
This efficiency is affected by the choice of the weighting matrix which has
been used in GMM estimation. The non-optimal weighting matrices have
been used in the conventional GMM estimators. This led to a loss of
efficiency. Therefore, we present new GMM estimators based on optimal or
suboptimal weighting matrices. Monte Carlo study indicates that the bias
and efficiency of the new estimators are more reliable than the
conventional estimators.

Youssef, D., H. Kandel, and J. El-Azab, "Application of laser speckle imaging methods for the evaluation of articular cartilage surface roughness", 9th International Conference of Laser Applications (ICLA), Egypt, 2016.
Youssef, G., "Aortic valve diseases in pregnancy", E-Journal of Cardiology Practice, vol. Vol. 18, issue N° 19, 2020. avd_during_pregnancy.pdf
Youssef, S. H., M. A. ‑M. Hegazy, D. Mohamed, and A. M. Badawey, Analysis of paracetamol, pseudoephedrine and cetirizine in Allercet Cold, , 2018. Abstract
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Youssef, D., and N. H. Solouma, "Accurate detection of blood vessels improves the detection of exudates in color fundus images", International Journal of Computer Methods and Programs in Biomedicine (CMPB), vol. 108, issue 3, pp. 1052-1061, 2012.
Youssef, R. M., M. A. Saleh, M. M. Korany, Z. A. Nour, and M. El-Kalioby, "Assessment of tissue E-cadherin and its proteolytic serum fragment in pemphigus vulgaris before and after remission: A case-control study.", Journal of cosmetic dermatology, 2022. Abstract

BACKGROUND: E-cadherin is a classic cadherin that mediates keratinocyte adhesion.

AIMS: To assess the tissue expression of E-cadherin and its proteolytic serum fragment (soluble E-cadherin) in pemphigus vulgaris (PV) before and after clinical remission compared with controls.

PATIENTS: Thirty-seven PV patients and thirty controls were enrolled. Pemphigus disease area index (PDAI) was calculated for patients at baseline and after remission. Punch biopsy specimens were taken from patients before, and after remission, and from controls for assessment of tissue E-cadherin by immunofluorescence. Similarly, serum samples were collected for assessment of serum soluble E-cadherin by ELISA.

RESULTS: Presence, intensity, and mean intensity of tissue E-cadherin were significantly reduced in PV patients before treatment compared with controls (p < 0.001). Detected E-cadherin showed mainly a basal and suprabasal distribution with cell surface and a cytoplasmic expression. Serum E-cadherin was significantly higher in patients before treatment compared with controls (p = 0.006). With remission, tissue E-cadherin presence, intensity, mean intensity, and serum E-cadherin showed statistically significant improvement (p = 0.003, <0.001, <0.001, and 0.003 respectively). Tissue E-cadherin presence and serum E-cadherin level reached values equivalent to the controls (p = 0.49 and 0.44, respectively).

CONCLUSIONS: Disruption of tissue E-cadherin and upregulation of serum soluble E-cadherin can contribute to the pathogenesis of PV. Clinical remission of PV is associated with normalization of tissue and serum E-cadherin.

Youssef, F. S., H. A. El-Banna, H. Y. Elzorba, and A. M. Galal, "Application of some nanoparticles in the field of veterinary medicine", International Journal of Veterinary Science and Medicine, vol. VOL. 7, issue NO. 1, pp. 78–93, 2019.
Youssef, S. H., M. A. B. D. E. L. - M. Hegazy, D. Mohamed, and A. M. Badawey, "Analysis of paracetamol, pseudoephedrine and cetirizine in Allercet Cold® capsules using spectrophotometric techniques", Chemistry Central Journal, vol. 12, issue 1: BioMed Central, pp. 1-14, 2018. Abstract
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Youssef, S. H., M. A. M. Hegazy, D. Mohamed, and A. M. Badawey, "ANALYSIS OF PARACETAMOL, PSEUDOEPHEDRINE AND BROMPHENIRAMINE IN COMTREX® TABLETS USING CHEMOMETRIC METHODS", WORLD JOURNAL OF PHARMACY AND PHARMACEUTICAL SCIENCES, vol. 6, issue 6, pp. 1644-1659, 2017. souha_paper_world_journal_of_pharmacy_and_pharmaceutical_sciences.pdf
Youssef S. S., R. E. A. Moghaieb, Rezkalla A. A, and A. S. M., "Application of molecular markers to assess genetic diversity among eight sorghum genotypes", Arab J Biotech, vol. 14, issue 1, pp. 101-112, 2011.
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