Podocyte Pedicels
Podocyte Pedicels - Related Videos
04:19
Deriving Human Kidney Podocytes from Induced Pluripotent Stem Cells: A Procedure for Directed Differentiation of Mature Kidney Podocytes from Stem Cells
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2023
In this video, we describe the protocol to derive human kidney podocytes from induced pluripotent stem cells through cell differentiation under defined chemical conditions. The generated podocytes can be used for nephrotoxicity testing and disease modeling.
12:19
Single-channel Analysis and Calcium Imaging in the Podocytes of the Freshly Isolated Glomeruli
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Cited by 25 •
2015
Changes in the intracellular calcium levels in the podocytes are one of the most important means to control the filtration function of glomeruli. Here we explain a high-throughput approach that allows detection of real-time calcium handling and single ion channels activity in the podocytes of the freshly isolated glomeruli.
08:52
Generation of Patient-Derived Podocytes from Skin Biopsies
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Cited by 5 •
2023
This manuscript describes a two-step protocol to generate patient-specific podocytes from dermal fibroblasts via episomal reprogramming into human-induced pluripotent stem cells (hiPSCs) and subsequent differentiation into podocytes.
06:18
Imaging of Podocytic Proteins Nephrin, Actin, and Podocin with Expansion Microscopy
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Cited by 3 •
2021
The presented method enables visualization of fluorescently labeled cellular proteins with expansion microscopy leading to a resolution of 70 nm on a conventional microscope.
08:06
Guided Differentiation of Mature Kidney Podocytes from Human Induced Pluripotent Stem Cells Under Chemically Defined Conditions
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Cited by 12 •
2020
Presented here is a chemically defined protocol for the derivation of human kidney podocytes from induced pluripotent stem cells with high efficiency (>90%) and independent of genetic manipulations or subpopulation selection. This protocol produces the desired cell type within 26 days and could be useful for nephrotoxicity testing and disease modeling.
FAQs
The actin cytoskeleton gives podocyte pedicels structural stability while allowing them to respond to mechanical forces generated during glomerular filtration. This balance helps preserve the architecture of the filtration barrier as blood passes through glomerular capillaries. Changes in actin organization can therefore alter pedicel shape and weaken the barrier’s ability to regulate movement of substances into urine.
Slit diaphragms form specialized connections between neighboring pedicels and include proteins such as nephrin. These junctions contribute to the selective properties of the glomerular filtration barrier rather than serving only as physical attachments. Their position between interdigitating processes helps organize the spaces through which filtered substances must pass, supporting controlled filtration from blood into urine.
Pedicel effacement, or disruption and flattening of the normal process arrangement, can compromise the filtration barrier’s selectivity. As barrier function deteriorates, proteins that would normally be retained in the blood may appear in urine, producing proteinuria. For this reason, changes in pedicel structure provide an important cellular context for understanding glomerular disease and impaired kidney function.
Structural analysis can connect the organization of podocyte pedicels with the performance of the glomerular filtration barrier. Investigators can consider whether preserved interdigitation, slit diaphragm organization, and cytoskeletal support correspond to effective control of filtration. Conversely, abnormal architecture can help explain loss of selectivity and the appearance of proteinuria in models or studies of glomerular injury.
Podocyte pedicels provide a cellular example of how specialized architecture, intercellular connections, and cytoskeletal organization cooperate to control tissue-level function. In biology, they link cell structure with selective transport, mechanical responsiveness, and disease-related change. Their study is therefore relevant not only to kidney function but also to understanding how cellular interfaces maintain physiological barriers.
Because pedicel damage is associated with disrupted barrier selectivity and proteinuria, preserving or restoring their organization is an important consideration in therapeutic research. Studies can use pedicel structure as a cellular focus when evaluating strategies for glomerular disease. The relevant outcome is whether barrier integrity and filtration selectivity remain supported, rather than structural appearance alone.