Articles – celtek-bioscience.com

Tissue Selectivity vs Cell Penetration: Why They Are Different Problems

September 23, 2026 by Yao Lin

Stylized biomedical illustration showing bead-like peptide chains crossing a cell membrane into vesicles in a circular inset, alongside similar chains traveling through a blood vessel toward a glowing cluster of tissue cells.

A cell-penetrating peptide may enter cultured cells efficiently yet fail to deliver its cargo selectively to a target tissue in vivo. This guide explains the biological distinction and the evidence needed to evaluate selectivity.

Cell-Surface Binding vs True Internalization in CPP Experiments

September 18, 2026 by Yao Lin

Stylized blue cross-section of a cell with a curved lipid membrane, glowing orange bead-like chains on the surface and inside, a membrane-bound vesicle, mitochondria, and a large purple nucleus.

A methods-focused guide to separating plasma-membrane binding, true CPP internalization, endosomal retention, and cytosolic delivery.

CB5005 Explained: Design, NF-κB Targeting, and the Preclinical Research Record

September 16, 2026 by Yao Lin

Blue-toned scientific illustration of a bead-like peptide chain crossing a curved cell membrane toward glowing linked molecular shapes beside a large cell interior, with vesicle-like and organelle-like forms in the background.

A chronological, evidence-led examination of CB5005, from its dual-function sequence and foundational patent to later glioma and lung-cancer delivery studies.

TNF-Alpha to NF-kB: A Step-by-Step Signaling Pathway

September 14, 2026 by Yao Lin

Blue-toned scientific illustration of a cell membrane receptor binding glowing orange molecules, with colorful protein-like clusters tracing a luminous path toward a large nucleus containing stylized DNA.

A mechanism-first explanation of how TNF-α activates canonical NF-κB through TNFR1, ubiquitin-organized signaling, TAK1, IKK, and IκBα degradation.

NF-κB p50 and p65: How the Classic Heterodimer Works

September 11, 2026 by Yao Lin

Stylized 3D illustration of two differently colored protein-like structures bound to a glowing DNA double helix near the edge of a cell nucleus, with soft-focus organelles in a blue cellular background.

A mechanism-focused guide to the canonical NF-κB p50/RelA heterodimer, from subunit composition and DNA binding to localization and assay interpretation.

The History of Celtek Bioscience: From Early SBIR Research to CB5005

September 10, 2026 by Yao Lin

Stylized blue-toned illustration of a cell taking up a linked peptide-like chain in small vesicles, with the chain continuing toward a glowing nucleus; faint research papers, a lightbulb icon, books, glassware, and a culture dish appear above.

An evidence-led timeline of Celtek Bioscience, covering its reported 2002 formation, early NIH Phase I awards, apoptosis-related patent work, and later preclinical delivery research.