This article describes the explant method for isolating mesenchymal stem cells from umbilical cord tissue, including DPBS washing, vessel removal, 1 mm3 explant seeding, adherence and medium supplementation timing, and the appearance of fibroblast-like outgrowth between days 3 and 14. It defines morphological criteria for distinguishing healthy from unhealthy cultures, namely fibroblast-like appearance, polarised swirling arrangement and even distribution without clustering, as opposed to uneven distribution, clumping, grid-like patterning and poor attachment. The article then provides complete protocols for osteogenic differentiation with Alizarin Red staining of calcium nodules, adipogenic differentiation with Oil Red O staining of lipid droplets, and chondrogenic differentiation in polypropylene tubes with Alcian blue staining of acidic mucopolysaccharides, together with the expected timelines and interpretation criteria for each readout.

Extracellular vesicles of 30-150 nm carry proteins, miRNA, mRNA and lipids and are central to intercellular communication in tumour metastasis, immune regulation, stem cell therapy and liquid biopsy. A major cause of irreproducible exosome data is the substantial load of bovine extracellular vesicles contributed by standard fetal bovine serum, reported at 10^9 to 10^10 particles per mL. This article analyses the four levels at which serum vesicles distort results: particle quantification in NTA, background bands and high-abundance bovine proteins in western blot and proteomics, contamination of sequencing libraries by bovine miRNA and mRNA, and false positives in functional gain- and loss-of-function assays. It also describes the multi-stage ultraspin plus nanofiltration preparation workflow and compares standard and exosome-depleted serum across exosome content, CD63 level, growth factor retention, proliferation rate, attachment and background cleanliness.

This practical guide explains when to use exosome-depleted fetal bovine serum (FBS) and how to standardise cell culture and supernatant collection. It covers four application scenarios in which serum vesicle background must be eliminated: exosome isolation and characterisation by NTA, TEM and marker validation; exosome functional and mechanistic studies; exosome omics and sequencing; and disease microenvironment models with drug delivery development. The guide also details medium exchange timing at 60-70% confluence, a 24-48 hour supernatant collection window, freeze-thaw handling, aseptic practices and cell type compatibility, together with quality-control indicators for selecting a reliable exosome-depleted serum, including quantified removal efficiency, culture performance, origin and safety, and batch stability.

This article provides an overview of proteolysis-targeting chimeras (PROTACs), heterobifunctional small molecules that eliminate pathogenic proteins through the ubiquitin-proteasome system. The architecture comprises three modules: a target-binding ligand, a linker and an E3 ubiquitin ligase ligand, most commonly recruiting CRBN, VHL, MDM2 or IAP. The article reviews the catalytic mechanism of action, the roles of linker chemistry in ternary complex formation, ligand-linker conjugate strategies, and the expanding clinical pipeline targeting AR, ER, BTK, IKZF1/3, BRD9, Bcl-xL and IRAK4, together with emerging modalities such as LYTAC and AUTOTAC.

This article reviews a 2026 Journal of Translational Medicine study on asiaticoside (AC) as an adjuvant for MSLN-targeted CAR-T therapy in ovarian cancer. Single-cell secretome profiling identifies TGF-beta1 as the key immunosuppressive factor that drives CAR-T exhaustion, and AC is shown to restore effector function by inhibiting the TGF-beta/SMAD axis and blocking Treg differentiation. In vitro, 20 uM AC selectively enhances lysis of MSLN-positive SKOV-3 and OVCAR-3 cells but not MSLN-negative ES-2 cells, with no effect on CAR-T viability. In vivo, AC combination therapy suppresses peritoneal and subcutaneous tumour growth without organ toxicity. The mechanistic conclusions were validated by multiplex immunofluorescence using the Absin abs50012-20T four-colour panel for CD3, Ki67, CD31 and DAPI on tumour sections.

This review summarizes a Pharmacological Research study in which small activating RNA was used to upregulate endogenous HIF-1α in non-viral piggyBac-engineered CAR-T cells. HIF1A-overexpressing CAR-T cells showed enhanced cytotoxicity, cytokine secretion and 3D tumor spheroid infiltration under 1% hypoxia through combined GLUT1-driven glycolytic upregulation and Nrf2/PGC-1α-mediated mitochondrial protection, and synergized with an anti-CTLA4 nanobody in vivo without evident organ toxicity. Absin human IL-2, TNF-α and IFN-γ ELISA kits (abs510001 / abs510006 / abs510007) provided the quantitative cytokine readouts across 2D co-cultures, 3D spheroids and mouse serum samples.

This review summarizes an Exploration paper describing an MN-MOF@DHC microneedle patch that combines a Ce-MOF nanozyme with sustained-release dihydrocapsaicin for diabetic wound regeneration. The platform simultaneously addresses oxidative stress overload, persistent chronic inflammation and defective angiogenesis, achieving near-complete wound closure by day 16 in both dorsal full-thickness wound and diabetic foot ulcer models. Absin Triton X-100 (abs9149) served as the universal permeabilization reagent for all immunofluorescence and immunohistochemistry steps, from cultured cells to 20 µm frozen tissue sections, underpinning the M1/M2 phenotyping, vascular and apoptosis imaging data.

This review examines a 2026 Science Advances study showing that short-chain fatty acids are sensed by p38α MAP kinase to suppress TLR signaling and relieve intestinal inflammation. Three reagents were central to the work: DSS for establishing the murine colitis model, pertussis toxin for excluding GPCR involvement in the observed effect, and a multiplex immunohistochemistry kit for simultaneous detection of macrophage, T cell, B cell and phospho-protein markers on a single clinical tissue section. Together they cover the complete chain from animal model construction through signaling pathway dissection to patient tissue validation, illustrating how complementary reagents support high-impact mechanistic studies.

Bovine extracellular vesicles naturally present in standard fetal bovine serum are a frequent and often overlooked source of artifacts in extracellular vesicle research: they inflate nanoparticle tracking counts, generate nonspecific bands in marker immunoblots and contaminate sequencing libraries with xenogeneic RNA. Exosome-depleted FBS is prepared by multi-stage ultracentrifugation combined with nanofiltration, removing more than 95% of endogenous bovine vesicles while retaining growth factors, amino acids and hormones. This article compares the two serum types, defines the experimental settings in which vesicle depletion is essential, and summarizes key handling considerations for EV isolation, functional studies and omics workflows.

Hormone signaling and directed stem cell differentiation assays often suffer from poor reproducibility and elevated background, largely because conventional fetal bovine serum contains endogenous hormones and lipophilic small molecules. Charcoal-stripped FBS uses a dextran-coated activated charcoal adsorption process to selectively remove these small molecules while preserving albumin, transferrin, glucose and amino acids. This note compares charcoal-stripped and conventional FBS, defines the assay types that require the stripped product — hormone receptor studies, hormone-dependent tumor models, directed differentiation and nuclear receptor reporter assays — and summarizes practical handling precautions for reproducible results.

This guide explains how to establish and reproduce the experimental autoimmune myasthenia gravis (EAMG) model using the AChR α(97–116) peptide, covering the immunization protocol in C57BL/6 mice, clinical scoring and model evaluation, and practical troubleshooting tips for reproducible myasthenia gravis research.

This article provides a comprehensive standard operating procedure (SOP) for THP-1 cell culture, covering thawing, passaging, cryopreservation, and key considerations such as medium preparation, cell density control, and PMA-induced differentiation, helping researchers maintain cell quality and experimental reproducibility.