M. A. A. Mohamed

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Medulloblastomas are highly invasive tumors which are generally disseminated at the time of diagnosis. High and continued morbidity and mortality have prompted the search for new biologic markers that might be used for targeted therapy to minimise treatment related side effects. In this work, we studied the positive expression of survivin in medulloblastoma(More)
New protocol for optical code-division multiple access (CDMA) networks is proposed. Our proposed protocol is based on selective retransmission technique. A mathematical model is presented using a detailed state diagram. The protocol is analyzed using equilibrium point analysis (EPA), and its performance is examined using traditional throughput and average(More)
A key feature of Parkinson's disease is the dopaminergic neuronal cell loss in the substantia nigra pars compacta. Besides inflammation, oxidative stress and apoptosis, a recent hypothesis suggested that degeneration of dopaminergic neurons occurs secondary to abnormal mitosis in these 'postmitotic neurons', ending up in apoptosis. Hence, recent therapies(More)
BACKGROUND Tissues such as the lung, liver, and pancreas that have a low steady-state cell turnover yet can respond robustly after injury to replace damaged cells. The airway epithelium is exposed to inhaled particles and pathogens that may lead to the development of a many infectious and inflammatory respiratory diseases. Lung transplantation is an(More)
BACKGROUND In severe chronic stages of emphysema the only treatment is lung transplantation. SO, an urgent need exists for the development of effective treatments. Stem cells therapy arises as a new therapeutic approach. AIM OF THE WORK To investigate whether bone marrow mononuclar cells (BMMNCs) can promote lung regeneration and decrease apoptosis in(More)
A key feature of Parkinson's disease is the dopaminergic neuronal cell loss in the substantia nigra pars compacta. Many triggering pathways have been incriminated in the pathogenesis of this disease including inflammation, oxidative stress, excitotoxicity and apoptosis. Thyroid hormone is an essential agent for the growth and maturation of neurons;(More)
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