Publications

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2021
Sayed, K. S., F. N. Mohammed, R. M. A. B. D. E. L. HAY, K. S. Amr, and A. M. AlOrbani, "Cyclooxygenase-2 Gene Polymorphisms -765G>C and -1195A>G and Mycosis Fungoides Risk.", Dermatology (Basel, Switzerland), vol. 237, issue 1, pp. 17-21, 2021. Abstract

BACKGROUND: Cyclooxygenase-2 (COX-2) is an inducible modulator of inflammation that acts through increasing prostaglandin levels and has been described as a major mediator linking inflammation to cancer. Previous studies supported that COX-2-765G>C and -1195A>G polymorphisms were associated with increased risk of several solid tissue cancers as well as some hematological malignancies.

OBJECTIVE: The aim of the study was to elucidate the association between functional COX-2 genotypes (-765G>C and -1195A>G) polymorphisms and the risk of developing mycosis fungoides (MF).

METHODS: This was a hospital-based, case-control study of 70 MF patients and 100 MF-free controls. We genotyped COX-2 -1195A>G, -765G>C, and -8473T>C polymorphisms by using the PCR-restriction fragment length polymorphism method.

RESULTS: The AA genotype in the COX-2 -1195A>G gene polymorphism and the GC genotype in the COX-2 -765G>C gene were significantly more frequent among MF patients compared to controls (p< 0.001 and p = 0.002, respectively).

CONCLUSION: The -results indicate a possible role of COX-2 genes in the pathogenesis of MF. These novel findings may allow for notable future advances, as it will enable the identification of the -individuals most susceptible to MF.

2020
Zaher, H. A., H. I. GAWDAT, R. A. HEGAZY, F. N. Mohammed, A. M. AlOrbani, N. A. Ibrahim, and K. S. Sayed, "Assessment of the role of spleen tyrosine kinase and zeta-chain-associated 70-kDa protein (tyrosine) kinase in the pathogenesis of psoriasis.", Indian journal of dermatology, venereology and leprology, vol. 86, issue 1, pp. 85-87, 2020.
EL-KOMY, M. O. H. A. M. E. D. H. U. S. S. E. I. N. M. E. D. H. A. T., H. Mashaly, K. S. Sayed, V. Hafez, M. S. El-Mesidy, E. R. Said, M. A. Amer, A. M. AlOrbani, D. G. Saadi, M. El-Kalioby, et al., "Clinical and epidemiologic features of psoriasis patients in an Egyptian medical center", JAAD International, vol. 1, issue 2, pp. 81-90, 2020.
Sayed, K. S., M. H. M. El-Komy, H. Shehata, S. H. ElShazly, E. D. ElDesouky, K. S. Amr, N. M. ElAraby, and A. M. AlOrbani, "JAK1 rs310241 and JAK3 rs3008 Genotypes May Increase Susceptibility to Psoriasis: A Case Control Study.", Skin pharmacology and physiology, vol. 33, issue 4, pp. 207-212, 2020. Abstract

BACKGROUND: Janus kinases (JAKs) are a family of non-receptor protein tyrosine kinases that are expressed in a variety of tissues. Several JAK-controlled cytokine receptor pathways are incriminated in the initiation and progression of psoriasis. Genetic polymorphisms influencing JAK expression would be anticipated to have a great impact on disease activity.

OBJECTIVE: The aim of the study was to evaluate the association between JAK1 rs310241 and JAK3 rs3008 polymorphisms and the risk of developing psoriasis.

METHODS: Blood samples of 150 patients and 120 controls were screened for nucleotide polymorphisms in JAK1 rs310241 and JAK3 rs3008 genes by using polymerase chain reaction (PCR)-restriction fragment length polymorphism technique.

RESULTS: The GG genotype of the JAK1 rs310241 and JAK3 rs3008 genes was significantly associated with an increase in psoriasis risk (p = 0.000, OR = 7.7, 95% CI = 2.8-21.5; p = 0.003, OR = 3.3, 95% CI = 1.5-6.9, respectively). The G allele of both genes was also associated with psoriasis susceptibility (p = 0.000, OR = 2.0, 95% CI = 1.4-2.8; p = 0.002, OR = 1.7, 95% CI = 1.2-2.4, respectively).

CONCLUSION: The results indicate a possible association between JAK1 rs310241 and JAK3 rs3008 gene polymorphisms and susceptibility to psoriasis. These findings validate the importance of these molecules in psoriasis and may enable the identification of the individuals most susceptible to the disease.

2016
Rasheed, H., M. H. M. El-Komy, R. A. Hegazy, H. I. Gawdat, A. M. AlOrbani, and O. G. Shaker, "Expression of sirtuins 1, 6, tumor necrosis factor, and interferon-γ in psoriatic patients.", International journal of immunopathology and pharmacology, vol. 29, issue 4, pp. 764-768, 2016 Dec. Abstract

Sirtuins (SIRT) have been regarded as culprits in the pathogenesis of various diseases. Their exact role has not been explained. This study aimed to assess the expression of SIRT1, SIRT6, tumor necrosis factor (TNF)-α, and interferon (IFN)-γ in psoriatic patients. Thirty psoriatic patients and 22 controls were enrolled. Clinical examination and Psoriasis Area and Severity Index (PASI) were obtained. Two skin biopsies (lesional, peri-lesional) and one from controls were obtained. Tissue levels of SIRT1, SIRT6, TNF-α, and IFN-γ were measured using ELISA. SIRT1 was significantly lower in lesional skin with gradual increase in perilesional followed by control skin (P <0.001). SIRT6, TNF-α, and IFN-γ were significantly higher in lesional than perilesional and control skin (P <0.001). Significant positive correlations were found between SIRT1 and TNF-α, IFN-γ and between SIRT6 and TNF-α in peri-lesional skin. SIRT1 and SIRT6 are potentially involved in the pathogenesis of psoriasis. Modulating their action could offer a novel therapy for such disease.