Publications by authors named "Ayman S Al-Hazmi"

Background And Objective: Commiphora gileadensis is a plant in the Burseraceae family that grows in the western area of Saudi Arabia. Traditionally, it is used in the treatment of some superficial infections.

Materials And Methods: The methanolic extract of Commiphora gileadensis isolated from its leaves and branches.

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Sphingosine-1-phosphate (S1P) is a pleiotropic sphingolipid derived by the phosphorylation of sphingosine either by sphingosine kinase 1 (SPHK1) or SPHK2. Importantly, S1P acts through five different types of G-protein coupled S1P receptors (S1PRs) in immune cells to elicit inflammation and other immunological processes by enhancing the production of various cytokines, chemokines, and growth factors. The airway inflammation in asthma and other respiratory diseases is augmented by the activation of immune cells and the induction of T-helper cell type 2 (Th2)-associated cytokines and chemokines.

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Background: Type 2 diabetes mellitus (T2DM) is a global problem. Association of multiple genes in T2DM becomes a hot point recently. This study was aimed to evaluate association of vitamin D receptor gene polymorphisms with susceptibility to T2DM.

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Objectives: To determine human papillomavirus (HPV) infection, cervical cancer, and vaccine awareness among the Saudi population.

Methods: This cross-sectional study of a convenience sample comprising 1033 participants (males and females) from different parts of Kingdom of Saudi Arabia was conducted between August 2018 and January 2019 using a web-based questionnaire. This self-administrated questionnaire was distributed to all participants.

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Background: The prevalence of obesity and vitamin D deficiency in Saudi Arabia has increased recently. Decreased physical activity might play a role in obesity. Previous studies showed an association between low vitamin D level and its receptor polymorphism with obesity development.

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Various constituents in clinical specimens, particularly feces, can inhibit the PCR assay and lead to false-negative results. To ensure that negative results of a diagnostic PCR assay are true, it should be properly monitored by an inhibition control. In this study, a cloning vector harboring a modified target DNA sequence (≈375 bp) was constructed to be used as a competitive internal amplification control (IAC) for a conventional PCR assay that detects ≈550 bp of the Cryptosporidium oocyst wall protein (COWP) gene sequence in human feces.

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Cryptosporidium diarrhea represents a relevant clinical problem in developing countries. In Al-Taif, a city of Saudi Arabia that lies at an altitude of an around 2 km above the sea level, Cryptosporidium infection seems to be undiagnosed in nearly all clinical laboratories. Furthermore, nothing was published regarding Cryptosporidium-associated diarrhea in this area.

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