essameldin_nada

Essameldin Abdelaziz Mohamed Ahmed Nada

Professor - Prof. of Dermatology,Venereology and Andrology

Faculty of medicine

Address: 8 Abou Bakr ElSedik Dokki Giza

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Publications Which contain the keyword: spermatozoa


Outer dense fibers abnormalities in spermatozoa of IOAT patients and their relation to oxidative stress and sperm motility
INTRODUCTION & OBJECTIVES: Human Spermatozoa are characterized by certain features that differentiate them from simple Flagella. One of these features is the presence of outer dense fibers (ODFs). ODFs are nine fibers surrounding Axoneme in the midpiece and extend to variable length through the principal piece. They represent about 30% of the protein portion of human spermatozoa and accordingly they ... Read more

2018-10-31 03:55:02 Keywords Spergiarszoa, , .s;13M, , ·:TEM, S, SEM, TEM, spermatozoa,
Electron Microscopic Study Of Spermatozoa In Smokers.
Objectives: .'I:o detect the .. effect of cigarette smoking onssemen parameters, detectefhe morphological abnormalities by scanning electron microscope (SBM) and to detect the ,pltra· structural changes by using transmission electron microscope (TEM): · ,· .. . " Setting; (?utpatjent clinic o;J; Dermatology and Venereology Department, So~ag University Hospitals ir1d Electron Microscope Uriit at So hag Faculty of Science. " ·' ... Read more

2018-09-29 20:55:34 Keywords spermatozoa, Oxidative stress, nuclear DNA, male infertility,
Negative effects of increased sperm DNA damage in relation to seminal oxidative stress in men with idiopathic and male factor infertility
OBJECTIVE: To examine the effects of increased sperm DNA damage in relation to seminal oxidative stress in men with idiopathic and male factor infertility. DESIGN: Prospective study. SETTING: Infertility clinic at a tertiary care academic institution. PATIENT(S): Ninety-two infertile men with normal female partners. Sixteen fertile donors served as the control group. INTERVENTION(S): Standard semen analysis and assessment of levels ... Read more

Leukocytospermia is associated with increased   reactive oxygen species production by human spermatozoa.
OBJECTIVE: To investigate the role of increased seminal leukocytes in enhancing reactive oxygen species (ROS) production by human spermatozoa. DESIGN: A prospective study. SETTING: Male infertility clinic. PATIENT(S): Forty-eight infertile men. INTERVENTION(S): Standard semen analysis. Assessment of sperm nuclear DNA damage by sperm chromatin structure assay. Incubation of spermatozoa from nonleukocytospermic samples with blood neutrophils. MAIN OUTCOME MEASURE(S): Spontaneous and ... Read more