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Glossary Epidermal Layers

multiple strata of cells forming the skin's outermost part

Epidermal layers refer to the multiple strata of cells that make up the outermost part of the skin, known as the epidermis. These layers include, from the deepest to the most superficial, the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (only in thick skin), and stratum corneum. Each layer has distinct functions, such as cell regeneration, protection against pathogens, and the formation of a barrier to prevent water loss.

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Research

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3D Printing of Skin Equivalents with Hair Follicle Structures and Epidermal-Papillary-Dermal Layers Using Gelatin/Hyaluronic Acid Hydrogels

research 3D Printing of Skin Equivalents with Hair Follicle Structures and Epidermal‐Papillary‐Dermal Layers Using Gelatin/Hyaluronic Acid Hydrogels

18 citations , July 2022 in “Chemistry - an Asian journal”

This study found that GelMA/HAMA bioink shows promise for 3D printing skin equivalents, as it effectively mimics the native skin's properties and supports hair follicle structure development.

Three-Dimensional Imaging of Tight Junction Network Across Multiple Layers of Human Epidermis by Array Tomography Using Backscattered Electron-Mode Scanning Electron Microscopy

research LB1081 Three-dimensional imaging of tight junction-network across multiple layers of human epidermis by array tomography using backscattered electron-mode scanning electron microscopy

August 2019 in “Journal of Investigative Dermatology”

This study found that tight junctions extend to the most superficial layer of the stratum granulosum in human skin, challenging previous claims of their limited presence in the epidermis.

research Trichohyalin: Presence in the Granular Layer and Stratum Corneum of Normal Human Epidermis

48 citations , May 1991 in “The journal of investigative dermatology/Journal of investigative dermatology”

This study found that trichohyalin, a protein previously thought to be restricted to hair and tongue, is also present in isolated cells within the granular layer and stratum corneum of normal human epidermis.

research The Effect of Ruby Laser Light on Cellular Proliferation of Epidermal Cells

9 citations , November 1999 in “Annals of Plastic Surgery”

This study found that ruby laser hair removal causes microscopic epidermal damage but does not lead to cellular hyperproliferation, unlike ultraviolet-irradiated cell damage.

research Three-Dimensional Analysis of Cell Division Orientation in Epidermal Basal Layer Using Intravital Two-Photon Microscopy

31 citations , September 2016 in “PLoS ONE”

The researchers reported that in hairless mice, epidermal cell division orientations and epidermal thickness varied by body site, with dorsal and ear epidermis primarily dividing parallel to the basement membrane, unlike hind paw and tail epidermis.

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Community Join

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community Hair repigmentation of poliosis circumscripta in androgenetic alopecia patient treated with exosomes and fractional picosecond laser

2 upvotes 2 years ago

Exosomes combined with fractional picosecond laser treatment were effective in treating androgenetic alopecia and promoting repigmentation in white hair patches. The role of exosomes in hair repigmentation, particularly in conditions like poliosis, is not well-studied.

community LLLT seems like it's at least a solid maintenance tool. Can also provide ok regrowth in AA and MPB. - Pubmed

17 upvotes 8 years ago

Low-Level Laser Therapy (LLLT) is seen as a safe and effective method for maintaining hair and promoting regrowth in androgenetic alopecia (AGA) and male pattern baldness (MPB), with devices like the HairMax LaserComb® and iRestore helmet being popular. Some users and professionals are skeptical about its long-term effectiveness and cost.

community People who don’t microneedle, why?

146 upvotes 11 months ago

Microneedling is often combined with minoxidil for hair growth, but concerns about scalp damage, pain, and effectiveness deter some users. Alternatives like finasteride, dutasteride, tretinoin, and laser treatments are preferred by others.

community Bryan Johnson’s Hairloss Regimine

27 upvotes 3 years ago

The post is about Bryan Johnson's hair loss regimen, which includes dutasteride mesotherapy, minoxidil, microneedling, and red laser therapy. The conversation includes discussions about the effectiveness of topical dutasteride and speculation about whether Bryan Johnson has had a hair transplant.

community I've seen this story around social media, and was surprised when I actually read it that the miracle cure in this case was exosome therapy, which I've previously tried for hairloss with little luck.

226 upvotes 2 months ago

Exosome therapy showed promising results for burn recovery but was less effective for hair loss. The conversation highlights skepticism about the visible results due to makeup and discusses the complexity of treating hair compared to skin.

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Learn

3 / 801 results

learn Low Level Laser Therapy

laser therapy for anti-inflammatory and likely insignificant hair regrowth effects

learn Epidermal Growth Factor

learn Osteopontin

signaling protein that, when suppressed, may grow hair by reducing inflammation and stem cell loss

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Experts

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Hair Transplant Surgeon
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Visakhapatnam, India

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