Bulge Isolation
Bulge Isolation - Related Videos
01:06
Multipotency and Niche of Bulge Stem Cell
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2023
A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
02:40
Isolation of Bacteria from the Mosquito Midgut
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2026
Source: Liu, X., et al. A Bacterial Oral Feeding Assay with Antibiotic-Treated Mosquitoes. J. Vis. Exp. (2020)This video demonstrates the dissection of the mosquito midgut to isolate gut bacteria. The midgut is extracted from the digestive tract, homogenized to release the bacteria, and plated on nutrient agar to culture bacterial colonies.
08:26
Isolation and Culture of Adult Epithelial Stem Cells from Human Skin
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Cited by 18 •
2011
A rapid, robust way of isolating viable adult epithelial stem cells from human skin is described. The method utilizes enzymatic digestion of skin collagen matrix , followed by plucking of hair follicles and isolation of single cell suspensions or tissue fragments for cell culture.
07:00
Isolation and Culture of Neural Crest Stem Cells from Human Hair Follicles
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Cited by 19 •
2013
This article presents a robust protocol for isolation and culture of neural crest stem cells from human hair follicles.
08:09
Vasodilation of Isolated Vessels and the Isolation of the Extracellular Matrix of Tight-skin Mice
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Cited by 1 •
2017
We describe the isolation of cardiac extracellular matrix from C57Bl/6J control mice, tight-skin mice, and tight-skin mice treated with the IRF5 inhibitory peptide. We also describe the vasodilation studies on the isolated vessels from C57Bl/6J, tight-skin mice and tight-skin mice treated with the IRF5 inhibitory peptide.
FAQs
The bulge provides a defined tissue microenvironment rather than an undifferentiated sample of the entire follicle. Examining cells from this location helps researchers relate epithelial stem-cell self-renewal and differentiation to their native niche. That connection is important when studying how local organization influences tissue maintenance, repair, and changes associated with the hair cycle.
Marker-based enrichment helps distinguish candidate stem-cell populations within material obtained from the bulge. This additional separation can make downstream analyses more focused than studying all dissociated cells together. Researchers can then examine population-specific properties, such as self-renewal or differentiation, and better connect observed cellular behavior with the specialized follicular region from which the cells originated.
Isolated bulge cells allow investigators to examine how epithelial stem cells contribute to self-renewal, differentiation, and hair-cycle regulation. These processes describe both the maintenance of the follicle and its capacity to generate changing tissue states. Studying them in isolated cells can clarify cellular behavior while retaining a direct connection to skin and follicle biology.
A typical workflow begins by locating the bulge according to its position within the hair follicle. The identified region is then microsurgically excised and dissociated into individual cells. Depending on the research question, the resulting preparation may be placed in culture, analyzed directly, or subjected to marker-based enrichment before downstream investigation.
Following dissociation, cells can support culture-based studies or other downstream analyses. Cultured material enables examination of cellular behavior, while analytical approaches can characterize or distinguish populations using relevant markers. These options let investigators study stem-cell properties, tissue responses, and relationships between the follicular niche and epithelial repair without limiting the work to one experimental readout.
Bulge-derived cells provide a way to investigate epithelial stem-cell contributions to wound healing and follicle regeneration. Researchers can examine whether isolated populations display behaviors relevant to repair, differentiation, or renewed follicle formation. The method therefore connects cellular observations with regenerative outcomes and supports broader studies of skin biology and regenerative medicine.
Hair follicles undergo biologically meaningful changes across the hair cycle, so bulge-cell behavior should be interpreted in relation to follicular state. Studying isolated cells in this context can help researchers assess how self-renewal and differentiation relate to cycle regulation. This perspective prevents cellular findings from being separated entirely from the tissue process they help maintain.