KRAS mutations are among the most common oncogenic drivers in human cancers, notably in pancreatic, colorectal, and lung cancers. The KRAS gene encodes a protein that functions as a molecular switch, regulating cell growth and division. Mutations, particularly at codon 12 (such as G12D), impair the protein’s GTPase activity, leading to uncontrolled cellular proliferation. KRAS…
CA‑125 (Cancer Antigen 125): What It Is and Why It Matters CA‑125 is a high‑molecular‑weight glycoprotein found on the surface of certain cells inside the body. It is best known as a biomarker used in the detection and monitoring of ovarian cancer, although elevated levels can appear in several other conditions as well. In clinical…
The Thomsen–Friedenreich (TF) antigen, also known as CD176, is a disaccharide structure comprising galactose and N-acetylgalactosamine (Galβ1-3GalNAcα1-Ser/Thr). It serves as the core 1 structure in O-linked glycosylation of proteins. In healthy tissues, the TF antigen is typically masked by additional carbohydrate chains or sialylation, rendering it inaccessible to the immune system. However, in many cancer…
When it’s exposed, it can be detected by specific antibodies (like peanut agglutinin), and its presence is linked to disease processes. The Thomsen–Friedenreich antigen (T antigen) — sometimes called the T-antigen or T-disaccharide — is a carbohydrate structure normally hidden on cell surfaces by glycosylation. In healthy tissues, it’s cryptic (masked), but in certain diseases…
Prostate-Specific Antigen (PSA) is a widely used cancer biomarker, particularly for prostate cancer (PCa). While it has transformed prostate cancer screening and monitoring, it also has notable limitations. Here’s a detailed breakdown based on current research: 🔍 What is PSA? PSA is a serine protease produced mainly by the prostate gland. It is highly organ-specific…
Alpha-fetoprotein (AFP) is a protein normally produced by the fetal liver and yolk sac during development. In adults, AFP levels are usually very low, so an elevated AFP can be a sign of certain medical conditions. Causes include: 1. Liver-related conditions 2. Germ cell tumors 3. Pregnancy-related causes 4. Other less common causes Key points:…
