scholarly journals 336 In vitro models to study angiogenic effects of dermal papilla cells as cellular component of skin substitutes

2021 ◽  
Vol 141 (10) ◽  
pp. S207
Author(s):  
F. Oppenheimer ◽  
J.M. Ceruti ◽  
G.J. Leiros ◽  
M.E. Balañá
Keyword(s):  
Dermal Papilla ◽  
In Vitro Models ◽  
Cellular Component ◽  
Skin Substitutes ◽  
Dermal Papilla Cells

scholarly journals Design of In Vitro Hair Follicles for Different Applications in the Treatment of Alopecia—A Review

Biomedicines ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 435
Author(s):  
Matej Žnidarič ◽  
Žan Michel Žurga ◽  
Uroš Maver
Keyword(s):  
Dermal Papilla ◽  
In Vitro Models ◽  
Research Field ◽  
Hair Follicles ◽  
Dermal Papilla Cells ◽  
Vitro Model ◽  
Skin Morphology ◽  
Difficult Challenge

The hair research field has seen great improvement in recent decades, with in vitro hair follicle (HF) models being extensively developed. However, due to the cellular complexity and number of various molecular interactions that must be coordinated, a fully functional in vitro model of HFs remains elusive. The most common bioengineering approach to grow HFs in vitro is to manipulate their features on cellular and molecular levels, with dermal papilla cells being the main focus. In this study, we focus on providing a better understanding of HFs in general and how they behave in vitro. The first part of the review presents skin morphology with an emphasis on HFs and hair loss. The remainder of the paper evaluates cells, materials, and methods of in vitro growth of HFs. Lastly, in vitro models and assays for evaluating the effects of active compounds on alopecia and hair growth are presented, with the final emphasis on applications of in vitro HFs in hair transplantation. Since the growth of in vitro HFs is a complicated procedure, there is still a great number of unanswered questions aimed at understanding the long-term cycling of HFs without losing inductivity. Incorporating other regions of HFs that lead to the successful formation of different hair classes remains a difficult challenge.

Effects of glucocorticoid on human dermal papilla cells in vitro

2013 ◽  
Vol 135 ◽  
pp. 24-29 ◽  
Author(s):  
Soon-Jin Choi ◽  
A-Ri Cho ◽  
Seong-Jin Jo ◽  
Sungjoo Tommy Hwang ◽  
Kyu Han Kim ◽  
...  
Keyword(s):  
Dermal Papilla ◽  
Dermal Papilla Cells

scholarly journals Premature Senescence of Balding Dermal Papilla Cells In Vitro Is Associated with p16INK4a Expression

2008 ◽  
Vol 128 (5) ◽  
pp. 1088-1094 ◽  
Author(s):  
Adiam W. Bahta ◽  
Nilofer Farjo ◽  
Bessam Farjo ◽  
Mike P. Philpott
Keyword(s):  
Dermal Papilla ◽  
Premature Senescence ◽  
Dermal Papilla Cells ◽  
P16ink4a Expression

Smooth muscle alpha-actin is a marker for hair follicle dermis in vivo and in vitro

1991 ◽  
Vol 99 (3) ◽  
pp. 627-636 ◽  
Author(s):  
C.A. Jahoda ◽  
A.J. Reynolds ◽  
C. Chaponnier ◽  
J.C. Forester ◽  
G. Gabbiani
Keyword(s):  
Smooth Muscle ◽  
Hair Follicle ◽  
Dermal Papilla ◽  
Hair Follicles ◽  
Dermal Papilla Cells ◽  
Smooth Muscle Alpha Actin ◽  
Actin Expression ◽  
Alpha Actin ◽  
Sheath Cells

We have examined the expression of smooth muscle alpha-actin in hair follicles in situ, and in hair follicle dermal cells in culture by means of immunohistochemistry. Smooth muscle alpha-actin was present in the dermal sheath component of rat vibrissa, rat pelage and human follicles. Dermal papilla cells within all types of follicles did not express the antigen. However, in culture a large percentage of both hair dermal papilla and dermal sheath cells were stained by this antibody. The same cells were negative when tested with an antibody to desmin. Overall, explant-derived skin fibroblasts had relatively low numbers of positively marked cells, but those from skin regions of high hair-follicle density displayed more smooth muscle alpha-actin expression than fibroblasts from areas with fewer follicles. 2-D SDS-PAGE confirmed that, unlike fibroblasts, cultured papilla cells contained significant quantities of the alpha-actin isoform. The rapid switching on of smooth muscle alpha-actin expression by dermal papilla cells in early culture, contrasts with the behaviour of smooth muscle cells in vitro, and has implications for control of expression of the antigen in normal adult systems. The very high percentage of positively marked cultured papilla and sheath cells also provides a novel marker of cells from follicle dermis, and reinforces the idea that they represent a specialized cell population, contributing to the heterogeneity of fibroblast cell types in the skin dermis, and possibly acting as a source of myofibroblasts during wound healing.

scholarly journals The Effect of JAK Inhibitor on the Survival, Anagen Re-Entry, and Hair Follicle Immune Privilege Restoration in Human Dermal Papilla Cells

2020 ◽  
Vol 21 (14) ◽  
pp. 5137
Author(s):  
Jung Eun Kim ◽  
Yu Jin Lee ◽  
Hye Ree Park ◽  
Dong Geon Lee ◽  
Kwan Ho Jeong ◽  
...  
Keyword(s):  
Growth Factors ◽  
Hair Follicle ◽  
Dermal Papilla ◽  
Immune Privilege ◽  
Jak Inhibitors ◽  
Dermal Papilla Cells ◽  
Ifn Γ ◽  
Vitro Model ◽  
Stat Pathway

Topical or systemic administration of JAK inhibitors has been shown to be a new treatment modality for severe alopecia areata (AA). Some patients show a good response to JAK inhibitors, but frequently relapse after cessation of the treatment. There have been no guidelines about the indications and use of JAK inhibitors in treating AA. The basic pathomechanism of AA and the relevant role of JAK inhibitors should support how to efficiently use JAK inhibitors. We sought to investigate the effect of JAK1/2 inhibitor on an in vitro model of AA and to examine the possible mechanisms. We used interferon gamma-pretreated human dermal papilla cells (hDPCs) as an in vitro model of AA. Ruxolitinib was administered to the hDPCs, and cell viability was assessed. The change of expression of the Wnt/β-catenin pathway, molecules related to the JAK-STAT pathway, and growth factors in ruxolitinib-treated hDPCs was also examined by reverse transcription PCR and Western blot assay. We examined immune-privilege-related molecules by immunohistochemistry in hair-follicle culture models. Ruxolitinib did not affect the cell viability of the hDPCs. Ruxolitinib activated several molecules in the Wnt/β-catenin signaling pathway, including Lef1 and β-catenin, and suppressed the transcription of DKK1 in hDPCs, but not its translation. Ruxolitinib reverted IFN-γ-induced expression of caspase-1, IL-1β, IL-15, and IL-18, and stimulated several growth factors, such as FGF7. Ruxolitinib suppressed the phosphorylation of JAK1, JAK2 and JAK3, and STAT1 and 3 compared to IFN-γ pretreated hDPCs. Ruxolitinib pretreatment showed a protective effect on IFN-γ-induced expression of MHC-class II molecules in cultured hair follicles. In conclusion, ruxolitinib modulated and reverted the interferon-induced inflammatory changes by blocking the JAK-STAT pathway in hDPCs under an AA-like environment. Ruxolitinib directly stimulated anagen-re-entry signals in hDPCs by affecting the Wnt/β-catenin pathway and promoting growth factors in hDPCs. Ruxolitinib treatment prevented IFN-γ-induced collapse of hair-follicle immune privilege.

Apoptosis of the dermal papilla cells of hair follicle associated with the expression of gene HSPCO16 in vitro

2005 ◽  
Vol 14 (3) ◽  
pp. 209-214 ◽  
Author(s):  
Wei B. Yang ◽  
Fei Hao ◽  
Zhi Q. Song ◽  
Xi C. Yang ◽  
Bing Ni
Keyword(s):  
Hair Follicle ◽  
Dermal Papilla ◽  
Dermal Papilla Cells

scholarly journals Wnt10b promotes hair follicles growth and dermal papilla cells proliferation via Wnt/β-Catenin signaling pathway in Rex rabbits

2020 ◽  
Vol 40 (2) ◽  
Author(s):  
Zhenyu Wu ◽  
Yanli Zhu ◽  
Hongli Liu ◽  
Gongyan Liu ◽  
Fuchang Li
Keyword(s):  
Cell Cycle ◽  
Signaling Pathway ◽  
Cell Cycle Progression ◽  
Dermal Papilla ◽  
Hair Shaft ◽  
Hair Follicles ◽  
Dermal Papilla Cells ◽  
Root Sheath ◽  
Inner Root Sheath

Abstract Wnt signaling plays an important role in the growth and development of hair follicles (HFs). Among the signaling molecules, Wnt10b was shown to promote the differentiation of primary skin epithelial cells toward the hair shaft and inner root sheath of the HF cells in mice in vitro. Whisker HFs were isolated from Rex rabbits and cultured in vitro to measure hair shaft growth. Meanwhile, dermal papilla cells (DPCs) were isolated and cultured in vitro. Treatment with AdWnt10b or the Wnt/β-Catenin Pathway inhibitor, XAV939, assessed the DPCs proliferation by CCK-8 assay. And the cell cycle was also analyzed by flow cytometry. We found that Wnt10b could promote elongation of the hair shaft, whereas XAV-939 treatment could eliminated this phenomenon. AdWnt10b treatment promoted the proliferation and induced G1/S transition of DPCs. AdWnt10b stimulation up-regulated β-Catenin protein in DPCs. Inhibition of Wnt/β-Catenin signaling by XAV-939 could decreased the basal and Wnt10b-enhanced proliferation of DPCs. And could also suppress the cell cycle progression in DPCs. In summary, our study demonstrates that Wnt10b could promote HFs growth and proliferation of DPCs via the Wnt/β-Catenin signaling pathway in Rex rabbits.

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