Human Renal Proximal Tubular Epithelial Cells (HRPTEpC)

Overview

Human Renal Proximal Tubular Epithelial Cells (HRPTEpC) is a cell model used for research applications where physiologically relevant identity and donor background support interpretation of experimental readouts. Human Epithelial Cells derived from Kidney (Renal Proximal Tubular) within the Urinary system.

Human renal proximal tubular epithelial cells (HRPTEpC) play a central role in renal physiology. They reabsorb the substances including the glucose and amino acids as well as control acid-base balance by the excretion of almost all the bicarbonate and the synthesis of ammonia. They are also involved in the excretion of metabolic end products. Furthermore, these cells are particularly sensitive to ischemic injury, and represent a primary target for xenobiotics, such as nephrotoxins (and their metabolites), whose effects can extend up to the kidney failure [1, 2] . HRPTEpC express IL-2R alpha and MHC class II antigens during inflammation, after renal transplantation, or in crescentic glomerulonephritis [3] . HRPTEpC culture provides a valuable in vitro model for studying the mechanisms of proximal tubular cell physiology and pathophysiology, as well as the potential mechanisms underlying nephrotoxins-induced renal toxicity. iXCells Biotechnologies provides high quality HRPTEpC, which are isolated from human kidneys and cryopreserved at P1, with ≥ 0.5 million cells in each vial. HRPTEpC express cytokeratin-18, -19, vimentin and ZO-1 [4] . They are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast, and fungi. HRPTEpC can be expanded for no more than 3 passages using Epithelial Cell Growth Medium ( Cat# MD-0041 ) under the conditions provided by iXCells Biotechnoliges. Further expansion may decrease the purity of the epithelial population. Figure 1. Human renal proximal tubular epithelial cells (HRPTEpC). (A) Phase contrast image of HPRTEpC. (B & C) Immunofluorescence staining with antibodies against ZO-1 (B) and Megalin (C).

Key elements and design rationale

• Cell identity: Epithelial Cells (Primary Cells)
• Source context: Kidney; Renal Proximal Tubular; Urinary
• Biosafety level: BSL-2 (follow your institution’s biosafety program and local regulations)

Product-specific elements (such as tissue source, donor background, and cell classification) help frame how results should be interpreted across assays and experimental conditions.

Biological background

Epithelial cells provide barrier and transport functions across tissues, coordinating innate defense, secretion, and repair responses in the face of environmental and inflammatory stressors.

Across primary and specialty cell models, experimental outcomes can be influenced by donor heterogeneity, passage history, confluence, and media composition. For interpretation, it is common to validate key markers or functional phenotypes in the user’s assay context and to document culture variables consistently.

Research relevance and current trends

• Increasing use of primary and specialty cells to improve translational relevance for target biology and phenotypic screening.
• Adoption of 3D culture formats and co-culture systems to better capture tissue microenvironments and cell–cell interactions.
• Integration of functional readouts with single-cell and multi-omics profiling to connect phenotype with molecular state.

Common research applications

• Profile identity markers by flow cytometry or immunostaining in cultured cells
• Quantify functional responses to defined stimuli relevant to the model system
• Compare baseline phenotype across donors/conditions using gene expression profiling
• Assess transporter or injury-response pathways relevant to renal/urologic biology
• Screen compounds or genetic perturbations for phenotype modulation using viability or imaging endpoints

Interpretation typically focuses on how a perturbation (e.g., cytokine exposure, metabolic stress, genetic manipulation, or compound treatment) shifts marker profiles or functional readouts relative to an appropriate control matched for donor and culture variables.

Notes for experimental interpretation

• Donor-to-donor heterogeneity can influence baseline phenotype and treatment response; include biological replicates when feasible.
• Passage number, confluence, and media composition can shift gene expression and functional readouts; track and report these variables consistently.
• Contamination control (including routine mycoplasma monitoring) supports reproducibility in downstream assays.
• Use appropriate negative/positive controls for the readout (e.g., unstimulated controls, pathway agonists/antagonists) to contextualize observed changes.

SKU:BHC18500045

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