Ahmed Elawwa

CYP11A1-derived Non-canonical Secosteroids and Circadian–Endocrine Regulation: A Scoping Review

Ashraf Soliman, Fawzia Alyafei, Nada Alaaraj, Noor Hamed, Ahmed Elawwa, Shayma Mohamed, Noora Alhumaidy, Khalid Siddiq & Mohamed Elkalaf · Asian Journal of Pediatric Research · 2026

Background: Vitamin D is traditionally characterized as a nutrient essential for calcium homeostasis. However, emerging evidence suggests that the cutaneous CYP11A1-driven secosteroid pathway serves as a "chemical proxy" for sunlight, linking environmental UV radiation to the syn...

Open access Research Article 10.9734/ajpr/2026/v16i2522

Adolescent Tobacco and Cannabis Exposure: Effects on Growth, Bone Health, Endocrine Function, and Reversibility: A Critical Narrative Review

Ashraf Soliman, Fawzia Alyafei, Nada Alaaraj, Noor Hamed, Shayma Ahmed & Ahmed Elawwa · Journal of Scientific Research and Reports · 2026

Adolescence is a developmentally sensitive interval in which linear growth, pubertal endocrine maturation, body-composition change, and rapid skeletal mineral accrual occur while experimentation with nicotine, tobacco, and cannabis commonly begins. This critical narrative review...

Open access Research Article 10.9734/jsrr/2026/v32i94504

The Use of Human Chorionic Gonadotropin and Testosterone in Adolescents with Constitutional Delay of Growth and Puberty and Hypogonadism: A Critical Narrative Review

Ashraf Soliman, Fawzia Alyafei, Nada Alaaraj, Noor Hamed, Shayma Ahmed & Ahmed Elawwa · Asian Journal of Research and Reports in Endocrinology · 2026

Delayed puberty in adolescent boys arises most commonly from a self-limited maturational variant, constitutional delay of growth and puberty, but must be distinguished from permanent hypogonadotropic or hypergonadotropic hypogonadism before hormonal treatment is selected, because...

Open access Research Article 10.9734/ajrre/2026/v9i1140

Gonadotropin–Testosterone Axis and Semen Response after Correction of Chronic Anaemia in β-Thalassaemia, Sickle Cell Disease, and Iron-Deficiency Anaemia: A Structured Review

Ashraf T. Soliman, Fawzia Alyafei, Nada Alaaraj, Noor Hamed, Shayma Ahmed & Ahmed Elawwa · International Blood Research & Reviews · 2026

Background: Male reproductive dysfunction is increasingly relevant in chronic anaemias as survival into adulthood has improved in β-thalassaemia and sickle cell disease, while iron-deficiency anaemia remains globally common. Impaired fertility arises through hypoxia, oxidative st...

Open access Research Article 10.9734/ibrr/2026/v17i4392