Klinik Mediviron Bukit Jelutong

03/03/2026

01/03/2026

Rheumatoid Arthritis Pathogenesis: Autoimmune Joint Inflammation

Rheumatoid arthritis (RA) is a chronic autoimmune disorder characterized by persistent synovial inflammation and progressive joint destruction.

The pathogenesis involves activation of autoreactive T cells and B cells that target synovial tissue. Autoantibodies such as rheumatoid factor (RF) and anti–citrullinated protein antibodies (ACPAs) contribute to immune complex formation and inflammation.

Inflammatory cytokines, particularly tumor necrosis factor (TNF) and interleukin-6 (IL-6), promote synovial hyperplasia and formation of pannus tissue. This invasive pannus erodes cartilage and bone, leading to joint deformity.

Chronic inflammation also produces systemic effects beyond the joints.

Rheumatoid arthritis reflects sustained immune dysregulation resulting in destructive synovial inflammation.

26/02/2026

Thyroid function is affected by a combination of genetics, nutrition, and environmental factors, with women and those with a family history being at higher risk. Key drivers include autoimmune diseases, iodine and other essential nutrient deficiencies, medications, pregnancy, environmental toxins, and lifestyle habits such as severe dieting.

Nutritional factors: iodine deficiency and deficiencies in iron, zinc, selenium, or vitamin D may impact thyroid function.

Autoimmune conditions: Hashimoto's disease and Graves' Disease which are often accompanied by other autoimmune disorders such as Type 1 diabetes, pernicious anemia, and celiac disease.

Exposure to endocrine-disrupting chemicals (BPA, phthalates), pesticides, and heavy metals (lead, mercury) may interfere with hormone production.

Radiation therapy to the head/neck, medications (e.g., amiodarone), and infections may trigger issues. Pregnancy may also affect thyroid function.

Thyroid disorders reshape people's lives in profound ways, and life suddenly flips for thyroid patients with countless visits to doctors and follow-ups.

As scientific progress accelerates, there is still a lot to do:

🔹 addressing the barriers that stand in the way of faster diagnosis
🔹 more focus on personalized treatment
🔹 better outcomes
🔹 better quality of life for thyroid patients.

Every story is unique, every diagnosis is personal, and advancing science must reflect that complexity.

25/02/2026

Coronary Artery Blockage and Myocardial Infarction: Ischemic Cardiac Injury

Coronary artery blockage occurs when atherosclerotic plaques narrow or obstruct blood flow within the coronary vessels supplying the myocardium.

Plaque rupture can trigger thrombus formation, leading to sudden and complete occlusion of the artery. This interrupts oxygen and nutrient delivery to cardiac muscle tissue.

Prolonged ischemia results in myocardial infarction, characterized by irreversible necrosis of affected cardiac cells. The extent of damage depends on the duration and location of the obstruction.

Myocardial infarction compromises cardiac contractility and may lead to arrhythmias, heart failure, or cardiogenic shock.

Prompt restoration of blood flow is critical to minimize myocardial injury and preserve cardiac function.

25/02/2026

Alzheimer Disease Pathology: Progressive Neurodegenerative Changes

Alzheimer disease is characterized by progressive neurodegeneration associated with distinct molecular and structural abnormalities in the brain.

The pathology involves extracellular accumulation of beta-amyloid plaques and intracellular neurofibrillary tangles composed of hyperphosphorylated tau protein. These abnormalities disrupt synaptic communication and impair neuronal transport systems.

Progressive synaptic loss and neuronal death occur predominantly in the hippocampus and cerebral cortex, leading to memory impairment and cognitive decline.

Neuroinflammation and oxidative stress further contribute to neuronal dysfunction.

Alzheimer pathology reflects a cascade of protein aggregation, synaptic failure, and widespread cortical atrophy.

25/02/2026

24/02/2026

Epigenetics Explained: Regulation Beyond DNA Sequence

Epigenetics refers to heritable changes in gene expression that occur without altering the underlying DNA sequence.

These changes are mediated through molecular modifications such as DNA methylation, histone modification, and non-coding RNA regulation. Such mechanisms influence how tightly DNA is packaged and whether specific genes are activated or silenced.

Epigenetic regulation plays a critical role in development, cellular differentiation, and adaptation to environmental factors. External influences such as nutrition, stress, toxins, and aging can modify epigenetic patterns.

Unlike genetic mutations, epigenetic changes are potentially reversible, highlighting their importance in health, disease progression, and therapeutic research.

25/11/2025