Browsing by Author "Khurshid, Yamna"

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    Association of salivary mmp-8 gene polymorphism with its protein expression in oral submucous fibrosis patients.
    (2025-02-24) Khurshid, Yamna
    OSF (Oral submucous fibrosis) is a chronic disease characterized by inflammation and progressive fibrosis of the submucosal tissues with the potential to progress into OSCC (Oral squamous cell carcinoma). Matrix metalloproteinases (MMP) are endopeptidases that play a role in extracellular matrix remodeling and pathophysiology of various diseases. The study aims to evaluate the gene polymorphism and protein expression of MMP-8 and their association with the severity of OSF. The cross-sectional study design involves patients diagnosed with OSF. DNA was extracted from saliva samples by the CTAB method followed by PCR and Sanger sequencing. The sequences were examined for MMP-8 polymorphism on Mega X software. ELISA was performed to assess the MMP-8 protein expression. The results of genetic polymorphism showed the alleles AG (rs11225395), TT (rs1861602574), CC (rs562617158), TT (rs2133511737), AA (rs1307439859), and CC (rs2133511706) consistent with disease severity. MMP-8 protein levels decreased with disease progression. Meanwhile, the association between the two showed a noteworthy significance with the presence of specific genetic variants, namely rs1320632, rs2133511732, rs1307439859, and rs2133511737, rs1307439859, rs562617158, rs11225395 shows a robust association with changes in MMP-8 protein expression. This study suggests a strong association between genotype and the modification of MMP-8 protein expression. In conclusion, MMP-8 may serve as a diagnostic biomarker in OSF.
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    Unmasking the Epigenome: Insights into Testicular Cell Dynamics and Reproductive Function.
    (2025-07-28) Anjum, Shabana; Khurshid, Yamna; Du Plessis, Stefan S; Omolaoye, Temidayo S
    The epigenetic landscape plays a pivotal role in regulating the functions of both germ and somatic cells (Sertoli and Leydig cells) within the testis, which are essential for male fertility. While somatic cells support germ cell maturation and testosterone synthesis, the epigenetic regulation of germ cells is critical for proper spermatogenesis and function. Epigenetic modifications such as DNA methylation, histone modifications, chromatin remodeling, and non-coding RNAs (ncRNAs) are crucial for regulating gene expression that is essential for spermatogenesis and reproductive function. Although numerous studies have highlighted the significance of the epigenome and its implications for male reproductive health, a comprehensive overview of the existing literature and knowledge is lacking. This review aims to provide an in-depth analysis of the role of epigenetics in spermatogenesis and reproductive health, with a specific focus on DNA methylation, histone remodeling, and small noncoding RNAs (sncRNAs). Additionally, we examine the impact of lifestyle and environmental factors, such as diet, smoking, physical activity, and exposure to endocrine-disrupting chemicals, on the sperm epigenome. We emphasize how these factors influence fertility, embryonic development, and potential transgenerational inheritance. This review underscores how recent advances in the understanding of the epigenetic modulation of testicular function can inform the pathophysiology of male infertility, thereby paving the way for the development of targeted diagnostic and therapeutic strategies.