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1.
J Med Case Rep ; 18(1): 431, 2024 Sep 17.
Artigo em Inglês | MEDLINE | ID: mdl-39285486

RESUMO

BACKGROUND: Tinea versicolor is a very common condition. We reported a specific follicular manifestation and proposed that this particular presentation might be related to the patient's history of previous keratosis pilaris. CASE PRESENTATION: A 46-year-old Asian woman of Han ethnicity presented to the clinic with trunk lesions for over a year. On physical examination: multiple light brown patches of varying size centered on hair follicles in the axillae and trunk, with the patches on the back fusing together and scales visible on the surface of the patches. Finally, through fungal microscopy and pathological examination, the patient was diagnosed with folliculocentric tinea versicolor. CONCLUSIONS: Follicular tinea versicolor is a rare type of tinea versicolor. It is still not clear what causes tinea versicolor to become folliculocentric. This case may suggest that patients with a history of keratosis pilaris may have a tendency to develop follicular centration in the course of other diseases.


Assuntos
Tinha Versicolor , Humanos , Feminino , Pessoa de Meia-Idade , Tinha Versicolor/diagnóstico , Tinha Versicolor/tratamento farmacológico , Antifúngicos/uso terapêutico , Folículo Piloso/patologia , Doença de Darier/diagnóstico , Doença de Darier/patologia , Anormalidades Múltiplas , Sobrancelhas/anormalidades
2.
Int J Biol Sci ; 20(11): 4162-4177, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39247826

RESUMO

Rationale: Reconstruction of hair follicles (HFs) and eccrine sweat glands (ESGs) is essential for functional skin regeneration. In skin reconstruction research, we found that foreskin-derived epidermal cells reconstructed HF organoids unidirectionally, but not ESG organoids. Methods: To investigate key genes and pathways influencing the fate of ESG and HF, a transcriptome profiling of ESG placode-containing skin and HF placode-containing skin was employed, and key DEGs were identified and validated by RT-qPCR and immunofluorescence staining in mice and rats. Subsequently, adult human epidermal cell-derived organoids were reconstructed to probe functional roles and mechanisms of FGF7 and FGF10 by series of approaches integrating RT-qPCR, immunofluorescence-staining, WB, apoptosis assay, and pathway interference assay. Results: All members of FGF7 subfamily were among the key DEGs screened, the differential expression of FGF7 and FGF10 and their receptors FGFR1/FGFR2 was verified between ESG placode-containing skin and HF placode-containing skin. In vivo and in vitro Matrigel plug models showed that both FGF7 and FGF10 promoted fate transition of human epidermal cell-derived organoids to ESG phenotype organoids, FGF7 and FGF10 had a synergistic effect, and mainly function through the FGFR1/2-MEK1/2-ERK1/2 pathway. Conclusions: Adult epidermal cells can be manipulated to reconstruct personalized HF and ESG to meet different needs.


Assuntos
Glândulas Écrinas , Fator 10 de Crescimento de Fibroblastos , Fator 7 de Crescimento de Fibroblastos , Organoides , Fator 10 de Crescimento de Fibroblastos/metabolismo , Humanos , Fator 7 de Crescimento de Fibroblastos/metabolismo , Fator 7 de Crescimento de Fibroblastos/genética , Organoides/metabolismo , Organoides/citologia , Animais , Camundongos , Glândulas Écrinas/metabolismo , Glândulas Écrinas/citologia , Ratos , Células Epidérmicas/metabolismo , Células Epidérmicas/citologia , Folículo Piloso/citologia , Folículo Piloso/metabolismo , Masculino , Fenótipo
3.
Stem Cell Res Ther ; 15(1): 287, 2024 Sep 11.
Artigo em Inglês | MEDLINE | ID: mdl-39256806

RESUMO

BACKGROUND: Androgenetic alopecia (AGA) is a common form of hair loss. Androgens, such as testosterone and dihydrotestosterone, are the main causes of AGA. Extracellular vesicles (EVs) derived from mesenchymal stem cells (MSCs) can reduce AGA. However, preparing therapeutic doses of MSCs for clinical use is challenging. Induced pluripotent stem cell-derived MSCs (iMSCs) are homogenous and easily expandable, enabling scalable production of EVs. Hyaluronic acid (HA) can exert various functions including free radical scavenging, immune regulation, and cell migration. Herein, we examined whether hyaluronic acid (HA) stimulation of iMSCs could produce EVs with enhanced therapeutic outcomes for AGA. METHODS: EVs were collected from iMSCs primed with HA (HA-iMSC-EVs) or without HA (iMSC-EVs). The characteristics of EVs were examined using dynamic light scattering, cryo-transmission electron microscopy, immunoblotting, flow cytometry, and proteomic analysis. In vitro, we compared the potential of EVs in stimulating the survival of hair follicle dermal papilla cells undergoing testosterone-mediated AGA. Additionally, the expression of androgen receptor (AR) and relevant growth factors as well as key proteins of Wnt/ß-catenin signaling pathway (ß-catenin and phosphorylated GSK3ß) was analyzed. Subsequently, AGA was induced in male C57/BL6 mice by testosterone administration, followed by repeated injections of iMSC-EVs, HA-iMSC-EVs, finasteride, or vehicle. Several parameters including hair growth, anagen phase ratio, reactivation of Wnt/ß-catenin pathway, and AR expression was examined using qPCR, immunoblotting, and immunofluorescence analysis. RESULTS: Both types of EVs showed typical characteristics for EVs, such as size distribution, markers, and surface protein expression. In hair follicle dermal papilla cells, the mRNA levels of AR, TGF-ß, and IL-6 increased by testosterone was blocked by HA-iMSC-EVs, which also contributed to the augmented expression of trophic genes related to hair regrowth. However, no notable changes were observed in the iMSC-EVs. Re-activation of Wnt/ß-catenin was observed in HA-iMSC-EVs but not in iMSC-EVs, as shown by ß-catenin stabilization and an increase in phosphorylated GSK3ß. Restoration of hair growth was more significant in HA-iMSC-EVs than in iMSC-EVs, and was comparable to that in mice treated with finasteride. Consistently, the decreased anagen ratio induced by testosterone was reversed by HA-iMSC-EVs, but not by iMSC-EVs. An increased expression of hair follicular ß-catenin protein, as well as the reduction of AR was observed in the skin tissue of AGA mice receiving HA-iMSC-EVs, but not in those treated with iMSC-EVs. CONCLUSIONS: Our results suggest that HA-iMSC-EVs have potential to improve AGA by regulating growth factors/cytokines and stimulating AR-related Wnt/ß-catenin signaling.


Assuntos
Alopecia , Vesículas Extracelulares , Folículo Piloso , Ácido Hialurônico , Células-Tronco Mesenquimais , Vesículas Extracelulares/metabolismo , Alopecia/terapia , Alopecia/metabolismo , Alopecia/tratamento farmacológico , Ácido Hialurônico/farmacologia , Ácido Hialurônico/metabolismo , Animais , Camundongos , Células-Tronco Mesenquimais/metabolismo , Células-Tronco Mesenquimais/citologia , Células-Tronco Mesenquimais/efeitos dos fármacos , Folículo Piloso/metabolismo , Folículo Piloso/efeitos dos fármacos , Humanos , Via de Sinalização Wnt/efeitos dos fármacos , Masculino , Receptores Androgênicos/metabolismo , Receptores Androgênicos/genética , Células-Tronco Pluripotentes Induzidas/metabolismo , Células-Tronco Pluripotentes Induzidas/citologia , Testosterona/farmacologia , Glicogênio Sintase Quinase 3 beta/metabolismo , Camundongos Endogâmicos C57BL
4.
Int J Biol Macromol ; 277(Pt 3): 134297, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39097055

RESUMO

Minoxidil (MXD) is the only topical over-the-counter medicine approved by the United States Food and Drug Administration for the treatment of androgenetic alopecia. For the purpose of targeting the delivery of MXD to dermal papilla in the hair follicle, MXD Pickering emulsion gels were fabricated based on the designability of deep eutectic solvent (DES) and the versatility of cellulose nanocrystal (CNC) and sodium carboxymethyl cellulose (CMC-Na). Structural studies and theoretical calculations results suggest that CNC can stabilize the interface between the MXD-DES and water, leading to the formation of Pickering emulsions. The rheological properties and stabilities of MXD Pickering emulsions were enhanced through gelation using CMC-Na, which highlights the good compatibility and effectiveness of natural polysaccharides in emulsion gels. Due to the particle size of emulsion droplets (679 nm) and the rheological properties of emulsion gel, the fabricated MXD formulations show in vivo hair regrowth promotion and hair follicle targeting capabilities. Interestingly, the MXD Pickering emulsion-based formulations exert therapeutic effects by upregulating the expression of hair growth factors. The proposed nanodrug strategy based on supramolecular strategies of CNC and CMC-Na provides an interesting avenue for androgenetic alopecia treatment.


Assuntos
Celulose , Emulsões , Géis , Folículo Piloso , Minoxidil , Nanopartículas , Minoxidil/química , Minoxidil/administração & dosagem , Minoxidil/farmacologia , Folículo Piloso/efeitos dos fármacos , Nanopartículas/química , Emulsões/química , Celulose/química , Géis/química , Animais , Reologia , Alopecia/tratamento farmacológico , Sistemas de Liberação de Medicamentos , Tamanho da Partícula , Ratos , Camundongos , Masculino , Portadores de Fármacos/química
5.
Int J Mol Sci ; 25(16)2024 Aug 20.
Artigo em Inglês | MEDLINE | ID: mdl-39201715

RESUMO

Androgenetic alopecia (AGA) is characterized by microinflammation and abnormal immune responses, particularly in the upper segment of hair follicles (HFs). However, the precise patterns of immune dysregulation remain unclear, partly due to limitations in current analysis techniques to preserve tissue architecture. The infundibulum, a major part of the upper segment of HFs, is associated with significant clusters of immune cells. In this study, we investigated immune cells around the infundibulum, referred to as peri-infundibular immune infiltration (PII). We employed spatial transcriptome profiling, a high-throughput analysis technology, to investigate the immunological disruptions within the PII region. Our comprehensive analysis included an evaluation of overall immune infiltrates, gene set enrichment analysis (GSEA), cellular deconvolution, differential expression analysis, over-representation analysis, protein-protein interaction (PPI) networks, and upstream regulator analysis to identify cell types and molecular dysregulation in immune cells. Our results demonstrated significant differences in immune signatures between the PII of AGA patients (PII-A) and the PII of control donors (PII-C). Specifically, PII-A exhibited an enrichment of CD4+ helper T cells, distinct immune response patterns, and a bias toward a T helper (Th) 2 response. Immunohistochemistry revealed disruptions in T cell subpopulations, with more CD4+ T cells displaying an elevated Th2 response and a reduced Th1-cytotoxic response compared to PII-C. These findings reveal the unique immune landscapes of PII-A and PII-C, suggesting potential for the development of innovative treatment approaches.


Assuntos
Alopecia , Perfilação da Expressão Gênica , Folículo Piloso , Transcriptoma , Humanos , Alopecia/genética , Alopecia/imunologia , Alopecia/metabolismo , Alopecia/patologia , Folículo Piloso/imunologia , Folículo Piloso/metabolismo , Folículo Piloso/patologia , Masculino , Adulto , Mapas de Interação de Proteínas , Pessoa de Meia-Idade , Feminino , Microambiente Celular/imunologia , Microambiente Celular/genética , Células Th2/imunologia , Células Th2/metabolismo , Linfócitos T CD4-Positivos/imunologia , Linfócitos T CD4-Positivos/metabolismo
6.
Life Sci Alliance ; 7(11)2024 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-39179288

RESUMO

Skin wound healing due to full thickness wounds typically results in fibrosis and scarring, where parenchyma tissue is replaced with connective tissue. A major advance in wound healing research would be to instead promote tissue regeneration. Helminth parasites express excretory/secretory (ES) molecules, which can modulate mammalian host responses. One recently discovered ES protein, TGF-ß mimic (TGM), binds the TGF-ß receptor, though likely has other activities. Here, we demonstrate that topical administration of TGM under a Tegaderm bandage enhanced wound healing and tissue regeneration in an in vivo wound biopsy model. Increased restoration of normal tissue structure in the wound beds of TGM-treated mice was observed during mid- to late-stage wound healing. Both accelerated re-epithelialization and hair follicle regeneration were observed. Further analysis showed differential expansion of myeloid populations at different wound healing stages, suggesting recruitment and reprogramming of specific macrophage subsets. This study indicates a role for TGM as a potential therapeutic option for enhanced wound healing.


Assuntos
Fibrose , Proteínas de Helminto , Regeneração , Cicatrização , Animais , Camundongos , Proteínas de Helminto/metabolismo , Proteínas de Helminto/farmacologia , Pele/metabolismo , Pele/lesões , Camundongos Endogâmicos C57BL , Folículo Piloso/metabolismo , Fator de Crescimento Transformador beta/metabolismo , Modelos Animais de Doenças , Macrófagos/metabolismo , Reepitelização , Masculino
7.
Bioorg Chem ; 151: 107709, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39137599

RESUMO

Ginger is an important cooking spice and herb worldwide, and scientific research has gradually confirmed the effect of ginger on preventing hair loss. Cedrol (CE) is a small sesquiterpene molecule in ginger and its external administration (EA) has shown hope in promoting hair growth, and alternative administration mode has become a potential treatment scheme to improve the efficacy of CE. The purpose of this study is to evaluate the effects of oral administration (OA) and EA of CE on hair regeneration of C57BL/6 alopecia areata (AA) mice induced by cyclophosphamide (CP) and to clarify the potential hair growth mechanism of CE in AA model in vitro and in vivo. The results showed that CE-OA has a shorter hair-turning black time and faster hair growth rate, and can lessen hair follicle damage induced by CP and promote hair follicle cell proliferation. Its effect is superior to CE-EA. At the same time, CE can increase the cytokines IFN-γ, IL-2, and IL-7 in the serum of mice, and decrease the expression of adhesion factors ICAM-1 and ELAM-1, thus alleviating the immunosuppression induced by CP. Mechanism research shows that CE regulates the JAK3/STAT3 signaling pathway, activates the Wnt3α/ß-catenin germinal center, and ameliorates oxidative stress induced by CP, thus promoting the proliferation of hair follicle cells and reversing AA. These results provide a theoretical basis for understanding the anti-AA mechanism of CE-OA, indicating that CE can be used as raw material for developing oral hair growth drugs.


Assuntos
Camundongos Endogâmicos C57BL , Sesquiterpenos , Zingiber officinale , Animais , Zingiber officinale/química , Administração Oral , Camundongos , Sesquiterpenos/farmacologia , Sesquiterpenos/química , Cabelo/efeitos dos fármacos , Cabelo/química , Proliferação de Células/efeitos dos fármacos , Regeneração/efeitos dos fármacos , Folículo Piloso/efeitos dos fármacos , Folículo Piloso/metabolismo , Estrutura Molecular , Masculino , Relação Dose-Resposta a Droga , Alopecia em Áreas/tratamento farmacológico , Relação Estrutura-Atividade , Ciclofosfamida/farmacologia , Sesquiterpenos Policíclicos
8.
Int J Dermatol ; 63(9): 1212-1220, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39155501

RESUMO

BACKGROUND: Androgenetic alopecia (AGA) is a prevalent hair loss disorder with psychological repercussions. Traditional treatments have limitations, leading to the exploration of regenerative therapies such as exosomes derived from adipose tissue stem cells (ASC-Exosomes). METHODS: First, using human hair follicle (HF) dermal papilla cells (hDPCs) treated with ASC-Exosomes, ALP, VCAN, ß-catenin, and LEF-1 levels with RT-PCR and p-GSK3ß, GSK3ß, ß-catenin, ALP, and ß-actin levels with western blot analysis were assessed. Hair shaft elongation test and assay for ALP, Ki-67, and ß-catenin were done using human HF organ culture. Patients with AGA had ASC-Exosomes treatment and were evaluated for hair counts, photographic assessments, subjective satisfaction, and safety profiles. RESULTS: ASC-Exosomes impact hDPCs, increasing proliferation and the upregulation of hair growth-related genes, including ALP, VCAN, ß-catenin, and LEF-1. The Wnt/ß-catenin pathway was activated, indicating their role in promoting hair growth. ASC-Exosomes also promoted hair shaft elongation and ALP activity, suggesting a potential for hair regeneration. Thirty participants with AGA enrolled and treated over 24 weeks. The subjects experienced a significant increase in total hair density, improved global photographic assessments, and reported higher subjective satisfaction without severe adverse reactions. CONCLUSION: This research contributes to the growing body of evidence supporting the use of exosomes in hair loss treatment, offering a safe and effective alternative for individuals with AGA.


Assuntos
Tecido Adiposo , Alopecia , Proliferação de Células , Exossomos , Folículo Piloso , Fator 1 de Ligação ao Facilitador Linfoide , Regeneração , Humanos , Alopecia/terapia , Folículo Piloso/citologia , Exossomos/metabolismo , Adulto , Masculino , Feminino , Tecido Adiposo/citologia , Fator 1 de Ligação ao Facilitador Linfoide/metabolismo , beta Catenina/metabolismo , Via de Sinalização Wnt , Pessoa de Meia-Idade , Cabelo/crescimento & desenvolvimento , Células-Tronco/metabolismo , Células-Tronco/fisiologia , Células Cultivadas , Resultado do Tratamento
10.
Int J Dermatol ; 63(9): 1122-1123, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39097931

RESUMO

Curly textured hair presents unique diagnostic and therapeutic challenges because of its distinct properties. In the September issue of the Journal, we explore recent advancements in understanding and treating various hair disorders, focusing on the specific challenges and treatments for curly hair. We discuss whether glucagon-like peptide-1 agonists contribute to or alleviate hair loss and highlight a promising, innovative therapy using adipose stem cell-derived exosomes to promote hair growth. Additionally, we examine therapeutic options for managing filler-induced alopecia and treating folliculitis decalvans.


Assuntos
Alopecia , Humanos , Alopecia/terapia , Alopecia/tratamento farmacológico , Alopecia/diagnóstico , Exossomos , Preenchedores Dérmicos/efeitos adversos , Preenchedores Dérmicos/administração & dosagem , Foliculite/diagnóstico , Foliculite/tratamento farmacológico , Cabelo/crescimento & desenvolvimento , Cabelo/efeitos dos fármacos , Folículo Piloso , Tecido Adiposo , Peptídeo 1 Semelhante ao Glucagon/agonistas
11.
Int J Mol Sci ; 25(15)2024 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-39125802

RESUMO

The hair follicle is the basis of hair regeneration, and the dermal papilla is one of the most important structures in hair regeneration. New intervention and reversal strategies for hair loss may arise due to the prevention of oxidative stress. GC/MS analysis was used to determine the compounds contained in NSO. Then, NSO was applied to DPC for cell proliferation and oxidative stress experiments. RNA-seq was performed in cells treated with NSO and minoxidil. The quantitative real-time polymerase chain reaction (qRT-PCR) was applied to verify the gene expression. The effects of NSO on hair length, weight, the number and depth of hair follicles, and the dermal thickness were also studied. GC/MS analysis showed that the main components of NSO were eicosapentaenoic acid, palmitic acid, and linoleic acid. NSO promotes DPC proliferation and reduces H2O2-mediated oxidative damage. NSO can also activate hair growth-related pathways and upregulate antioxidant-related genes analyzed by gene profiling. The topical application of NSO significantly promotes hair growth and increases hair length and weight in mice. NSO extract promotes hair growth and effectively inhibits oxidative stress, which is beneficial for the prevention and treatment of hair loss.


Assuntos
Proliferação de Células , Folículo Piloso , Cabelo , Estresse Oxidativo , Proliferação de Células/efeitos dos fármacos , Animais , Humanos , Folículo Piloso/efeitos dos fármacos , Folículo Piloso/metabolismo , Folículo Piloso/crescimento & desenvolvimento , Folículo Piloso/citologia , Camundongos , Estresse Oxidativo/efeitos dos fármacos , Cabelo/efeitos dos fármacos , Cabelo/crescimento & desenvolvimento , Antioxidantes/farmacologia , Derme/metabolismo , Derme/citologia , Derme/efeitos dos fármacos
12.
Int J Mol Sci ; 25(15)2024 Jul 30.
Artigo em Inglês | MEDLINE | ID: mdl-39125915

RESUMO

Cashmere goats possess two types of hair follicles, with the secondary hair follicles producing valuable cashmere fiber used for textiles. The growth of cashmere exhibits a seasonal pattern arising from photoperiod change. Transcription factors play crucial roles during this process. The transcription factor, cold-shock domain, containing C2 (Csdc2) plays a crucial role in modulating cell proliferation and differentiation. Our preceding research indicated that the expression of Csdc2 changes periodically during anagen to telogen. However, the mechanisms of Csdc2 in regulating SHF growth remain unclear. Here, we found that the knockdown of Csdc2 inhibits the proliferation of dermal papilla cells. ChIP-Seq analysis showed that Csdc2 had a unique DNA binding motif in SHFs. Through conjoint analysis of ChIP-Seq and RNA-Seq, we revealed a total of 25 candidate target genes of Csdc2. Notably, we discovered a putative Csdc2 binding site within roundabout guidance receptor 2 (Robo2) on chromosome 1 of the goat genome. Furthermore, qRT-PCR and dual-luciferase reporter assay confirmed Csdc2's positive regulatory influence on Robo2. These findings expand the research field of hair follicle transcriptional regulatory networks, offering insights into molecular breeding strategies to enhance cashmere production in goats.


Assuntos
Cabras , Folículo Piloso , Animais , Cabras/genética , Cabras/crescimento & desenvolvimento , Folículo Piloso/metabolismo , Folículo Piloso/crescimento & desenvolvimento , Proliferação de Células , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Regulação da Expressão Gênica , Sítios de Ligação
13.
Int J Mol Sci ; 25(15)2024 Aug 02.
Artigo em Inglês | MEDLINE | ID: mdl-39126021

RESUMO

The Basal Cell Carcinoma (BCC) is a sort of unique tumour due to its combined peculiar histological features and clinical behaviour, such as the constant binary involvement of the epithelium and the stroma, the virtual absence of metastases and the predilection of specific anatomical sites for both onset and spread. A potential correlation between the onset of BCC and a dysembryogenetic process has long been hypothesised. A selective investigation of PubMed-indexed publications supporting this theory retrieved 64 selected articles published between 1901 and 2024. From our analysis of the literature review, five main research domains on the dysembryogenetic pathogenesis of BCC were identified: (1) The correlation between the topographic distribution of BCC and the macroscopic embryology, (2) the correlation between BCC and the microscopic embryology, (3) the genetic BCC, (4) the correlation between BCC and the hair follicle and (5) the correlation between BCC and the molecular embryology with a specific focus on the Hedgehog signalling pathway. A large amount of data from microscopic and molecular research consistently supports the hypothesis of a dysembryogenetic pathogenesis of BCC. Such evidence is promoting advances in the clinical management of this disease, with innovative targeted molecular therapies on an immune modulating basis being developed.


Assuntos
Carcinoma Basocelular , Proteínas Hedgehog , Neoplasias Cutâneas , Carcinoma Basocelular/patologia , Carcinoma Basocelular/etiologia , Carcinoma Basocelular/genética , Humanos , Neoplasias Cutâneas/patologia , Neoplasias Cutâneas/genética , Neoplasias Cutâneas/etiologia , Proteínas Hedgehog/metabolismo , Proteínas Hedgehog/genética , Transdução de Sinais , Folículo Piloso/patologia , Folículo Piloso/embriologia , Folículo Piloso/metabolismo
14.
Exp Dermatol ; 33(8): e15155, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39133009

RESUMO

Hair loss affects men and women of all ages. Myokines, which are mainly secreted by skeletal muscles during exercise, have numerous health benefits. VEGF, IGF-1, FGF and irisin are reprehensive myokines. Although VEGF, IGF-1 and FGF are positively associated with hair growth, few studies have researched the effects of irisin on hair growth. Here, we investigated whether irisin promotes hair growth using in vitro, ex vivo and in vivo patch assays, as well as mouse models. We show that irisin increases proliferation, alkaline phosphatase (ALP) activity and mitochondrial membrane potential in human dermal papilla cells (hDPCs). Irisin activated the Wnt/ß-catenin signalling pathway, thereby upregulating Wnt5a, Wnt10b and LEF-1, which play an important role in hair growth. Moreover, irisin enhanced human hair shaft elongation. In vivo, patch assays revealed that irisin promotes the generation of new hair follicles, accelerates entry into the anagen phase, and significantly increases hair growth in C57BL/6 mice. However, XAV939, a Wnt/ß-catenin signalling inhibitor, suppressed the irisin-mediated increase in hair shaft and hair growth. These results indicate that irisin increases hair growth via the Wnt/ß-catenin pathway and highlight its therapeutic potential in hair loss treatment.


Assuntos
Fibronectinas , Glicogênio Sintase Quinase 3 beta , Folículo Piloso , Cabelo , Camundongos Endogâmicos C57BL , Via de Sinalização Wnt , beta Catenina , Animais , Humanos , Fibronectinas/metabolismo , Camundongos , Glicogênio Sintase Quinase 3 beta/metabolismo , Cabelo/crescimento & desenvolvimento , beta Catenina/metabolismo , Folículo Piloso/crescimento & desenvolvimento , Folículo Piloso/metabolismo , Fator 1 de Ligação ao Facilitador Linfoide/metabolismo , Proliferação de Células , Proteína Wnt-5a/metabolismo , Proteínas Wnt/metabolismo , Masculino , Feminino , Proteínas Proto-Oncogênicas
15.
Cell Death Dis ; 15(8): 598, 2024 Aug 17.
Artigo em Inglês | MEDLINE | ID: mdl-39153998

RESUMO

The mechanisms underlying tissue repair in response to damage have been one of main subjects of investigation. Here we leverage the wound-induced hair neogenesis (WIHN) models in adult mice to explore the correlation between degree of damage and the healing process and outcome. The multimodal analysis, in combination with single-cell RNA sequencing help to explore the difference in wounds of gentle and heavy damage degrees, identifying the potential role of toll-like receptor 9 (TLR9) in sensing the injury and regulating the immune reaction by promoting the migration of γδT cells. The TLR9 deficient mice or wounds injected with TLR9 antagonist have greatly impaired healing and lower WIHN levels. Inhibiting the migration of γδT cells or knockout of γδT cells also suppress the wound healing and regeneration, which can't be rescued by TLR9agonist. Finally, the amphiregulin (AREG) is shown as one of most important effectors secreted by γδT cells and keratinocytes both in silicon or in the laboratory, whose expression influences WIHN levels and the expression of stem cell markers. In total, our findings reveal a previously unrecognized role for TLR9 in sensing skin injury and influencing the tissue repair and regeneration by modulation of the migration of γδT cells, and identify the TLR9-γδT cells-areg axis as new potential targets for enhancing tissue regeneration.


Assuntos
Folículo Piloso , Regeneração , Receptor Toll-Like 9 , Cicatrização , Animais , Folículo Piloso/metabolismo , Receptor Toll-Like 9/metabolismo , Receptor Toll-Like 9/genética , Camundongos , Camundongos Endogâmicos C57BL , Anfirregulina/metabolismo , Anfirregulina/genética , Movimento Celular , Camundongos Knockout , Queratinócitos/metabolismo , Linfócitos Intraepiteliais/metabolismo
16.
Arch Dermatol Res ; 316(8): 523, 2024 Aug 16.
Artigo em Inglês | MEDLINE | ID: mdl-39150635

RESUMO

Dermal papilla cells (DPCs) exhibit self-recovery ability, which may be involved in hair growth. Therefore, we tested whether DPCs subjected to temporary growth-inhibiting stress (testosterone, 17ß-estradiol, mitomycin C, or undernutrition) treatments exhibit self-recovery behavior that can activate hair follicle growth, and examined the changes in cell proliferation capacity and gene expression. Related proteins were identified and their relationships with the hair cycle was examined using a mouse model. Recovery-period DPCs (i.e., from day 3 after loading) were subjected to microarray analysis to detect genetic variations common to each stress treatment. Co-culture of recovery-period DPCs and outer root sheath cells (ORSCs) confirmed the promotion of ORSC proliferation, suggesting that the activation of hair follicle growth is promoted via signal transduction. Chitinase 3-like 1 (CHI3L1) and C-X-C motif chemokine 5 (CXCL5) exhibited ORSC proliferation-promoting effects. Measurement of protein content in the skin during each phase of the hair cycle in mice revealed that CHI3L1 and CXCL5 secretion increased immediately after anagen transition. In a hair-loss mouse model treated with testosterone or 17ß-estradiol, CHI3L1 and CXCL5 secretion was lower in treated telogen skin than in untreated skin. Our results suggest that CHI3L1 and CXCL5 secreted by recovery-state DPCs promote hair growth.


Assuntos
Proteína 1 Semelhante à Quitinase-3 , Folículo Piloso , Cabelo , Animais , Humanos , Masculino , Camundongos , Alopecia/metabolismo , Alopecia/patologia , Proliferação de Células , Células Cultivadas , Quimiocina CXCL5/metabolismo , Proteína 1 Semelhante à Quitinase-3/metabolismo , Proteína 1 Semelhante à Quitinase-3/genética , Técnicas de Cocultura , Modelos Animais de Doenças , Estradiol/metabolismo , Estradiol/farmacologia , Cabelo/crescimento & desenvolvimento , Folículo Piloso/metabolismo , Camundongos Endogâmicos C57BL , Mitomicina/farmacologia , Transdução de Sinais , Testosterona/metabolismo , Testosterona/farmacologia
17.
Nature ; 633(8029): 407-416, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39169186

RESUMO

Billions of cells are eliminated daily from our bodies1-4. Although macrophages and dendritic cells are dedicated to migrating and engulfing dying cells and debris, many epithelial and mesenchymal tissue cells can digest nearby apoptotic corpses1-4. How these non-motile, non-professional phagocytes sense and eliminate dying cells while maintaining their normal tissue functions is unclear. Here we explore the mechanisms that underlie their multifunctionality by exploiting the cyclical bouts of tissue regeneration and degeneration during hair cycling. We show that hair follicle stem cells transiently unleash phagocytosis at the correct time and place through local molecular triggers that depend on both lipids released by neighbouring apoptotic corpses and retinoids released by healthy counterparts. We trace the heart of this dual ligand requirement to RARγ-RXRα, whose activation enables tight regulation of apoptotic cell clearance genes and provides an effective, tunable mechanism to offset phagocytic duties against the primary stem cell function of preserving tissue integrity during homeostasis. Finally, we provide functional evidence that hair follicle stem cell-mediated phagocytosis is not simply redundant with professional phagocytes but rather has clear benefits to tissue fitness. Our findings have broad implications for other non-motile tissue stem or progenitor cells that encounter cell death in an immune-privileged niche.


Assuntos
Apoptose , Folículo Piloso , Fagocitose , Células-Tronco , Folículo Piloso/citologia , Folículo Piloso/metabolismo , Animais , Camundongos , Células-Tronco/citologia , Células-Tronco/metabolismo , Masculino , Feminino , Fagócitos/citologia , Fagócitos/metabolismo , Homeostase , Regeneração , Ligantes , Camundongos Endogâmicos C57BL
18.
Theranostics ; 14(11): 4278-4296, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39113800

RESUMO

Background: Ulcerative colitis (UC) is an intestinal inflammatory disease that is strongly associated with mitochondrial damage and dysfunction as well as mitophagy and lacks of satisfactory treatments. Hair follicle mesenchymal stem cell (HF-MSC)-derived exosomes owe benefit effectiveness on inflammatory therapies. Hypoxia-preconditioned HF-MSCs exhibit enhanced proliferation and migration abilities, and their exosomes exert stronger effects than normal exosomes. However, the therapeutic function of Hy-Exos in UC is unknown. Methods: The inflammation model was established with LPS-treated MODE-K cells, and the mouse UC model was established by dextran sulfate sodium (DSS) administration. The therapeutic effects of HF-MSC-derived exosomes (Exos) and hypoxia-preconditioned HF-MSC-derived exosomes (Hy-Exos) were compared in vitro and in vivo. Immunofluorescence staining and western blotting were used to explore the effects of Hy-Exos on mitochondrial function, mitochondrial fission and fusion and mitophagy. MiRNA sequencing analysis was applied to investigate the differences in components between Exos and Hy-Exos. Results: Hy-Exos had a better therapeutic effect on LPS-treated MODE-K cells and DSS-induced UC mice. Hy-Exos promoted colonic tight junction proteins expression, suppressed the oxidative stress response, and reduced UC-related inflammatory injury. Hy-Exos may exert these effects via miR-214-3p-mediated inhibition of the PI3K/AKT/mTOR signaling pathway, maintenance of mitochondrial dynamic stability, alleviation of mitochondrial dysfunction and enhancement of mitophagy. Conclusion: This study revealed a vital role for Hy-Exos in suppressing inflammatory progression in UC and suggested that miR-214-3p is a potential critical target for Hy-Exos in alleviating UC.


Assuntos
Colite Ulcerativa , Modelos Animais de Doenças , Exossomos , Folículo Piloso , Células-Tronco Mesenquimais , Mitofagia , Fosfatidilinositol 3-Quinases , Proteínas Proto-Oncogênicas c-akt , Transdução de Sinais , Serina-Treonina Quinases TOR , Animais , Colite Ulcerativa/metabolismo , Colite Ulcerativa/terapia , Colite Ulcerativa/patologia , Células-Tronco Mesenquimais/metabolismo , Exossomos/metabolismo , Camundongos , Proteínas Proto-Oncogênicas c-akt/metabolismo , Serina-Treonina Quinases TOR/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Folículo Piloso/metabolismo , Sulfato de Dextrana , Masculino , Mitocôndrias/metabolismo , Camundongos Endogâmicos C57BL , MicroRNAs/metabolismo , MicroRNAs/genética , Humanos
19.
J Photochem Photobiol B ; 259: 113008, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39146875

RESUMO

Androgenic alopecia (AGA) typically manifests post-puberty, resulting in decreases in hair density, disruptions in the hair growth cycle, and alterations in hair follicle micro structure. Dihydrotestosterone (DHT) is a key hormone implicated in hair loss, especially on male. In this study, we found that each of arginine (Arg), arterial extract (AE) or biotin tripeptide-1 (BT-1), when combined with low level light therapy (LLLT, at 630 nm, 2 J/cm2), showed the efficacy in enhancing mitochondrial functions, cell proliferation and collagen synthesis in fibroblasts. Additionally, CARRIPOWER (the complexes of AE, BT-1, Arg, and Diaminopyrimidine derivatives), in conjunction with LLLT (630 nm, 2 J/cm2), showed promising results in dermal papilla cells (DPCs). The promising results contained not also inflammatory cytokines (IL-1ß and IL-6) and cell pro apoptotic factor (TGF-ß2) reduction, but also Wnt pathway inhibition by decreasing DKK1 level, and pro-hair growth factors (vascular endothelial growth factor (VEGF) and ß-catenin) increase. This innovative combination therapy offers a potential solution for the treatment of AGA, addressing both hormonal and cellular factors involved in hair loss.


Assuntos
Proliferação de Células , Fibroblastos , Cabelo , beta Catenina , Humanos , Proliferação de Células/efeitos dos fármacos , Proliferação de Células/efeitos da radiação , Fibroblastos/metabolismo , Fibroblastos/citologia , Fibroblastos/efeitos da radiação , Fibroblastos/efeitos dos fármacos , beta Catenina/metabolismo , Cabelo/efeitos da radiação , Cabelo/crescimento & desenvolvimento , Cabelo/efeitos dos fármacos , Fator A de Crescimento do Endotélio Vascular/metabolismo , Arginina/química , Arginina/farmacologia , Alopecia/terapia , Folículo Piloso/efeitos da radiação , Folículo Piloso/metabolismo , Folículo Piloso/efeitos dos fármacos , Terapia com Luz de Baixa Intensidade , Peptídeos e Proteínas de Sinalização Intercelular/metabolismo , Oligopeptídeos/química , Oligopeptídeos/farmacologia , Masculino , Colágeno/metabolismo , Colágeno/química , Via de Sinalização Wnt/efeitos dos fármacos , Via de Sinalização Wnt/efeitos da radiação , Linhagem Celular , Mitocôndrias/metabolismo , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/efeitos da radiação
20.
J Control Release ; 373: 652-666, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39089503

RESUMO

Androgenetic alopecia (AGA) is a non-fatal disease prevalent worldwide. However, mixed efficacy has been observed among different therapies for hair regrowth in AGA patients. Thus, a nano-platform with synergistic treatments based on a hybrid extracellular vesicle encapsulating gold nanoparticles (AuNPs) and finasteride (Hybrid/Au@Fi) was constructed through membrane fusion between hair follicle stem cell (HFSC)-derived extracellular vesicles and liposomes. These hybrid vesicles (HVs) not only fuel hair regrowth by providing cellular signals in extracellular vesicles, but also improve storage stability, follicle retention, and drug encapsulation efficiency (EE%) for finasteride inhibiting 5α-reductase, and nano-size AuNPs that simulate low-level laser therapy (LLLT) with similar photothermal effects in vitro. The EE% of finasteride in these HVs reached 45.33%. The dual administration of these extracellular vesicles and finasteride showed a strong synergistic effect on HFSCs in vitro. In an AGA mouse model, once-daily topical Hybrid/Au@Fi (115.07 ± 0.32 nm, -7.50 ± 1.68 mV) gel led to a faster transition of hair follicles (HFs) from the catagen to the anagen, increased hair regrowth coverage, and higher quality of regrowth hair, compared to once-daily 5% minoxidil treatment. Compared to topical minoxidil, the multifaceted synergistic therapy of Hybrid/Au@Fi through topical administration offers a new option for intractable AGA patients with low side effects.


Assuntos
Inibidores de 5-alfa Redutase , Alopecia , Vesículas Extracelulares , Finasterida , Ouro , Folículo Piloso , Nanopartículas Metálicas , Células-Tronco , Finasterida/administração & dosagem , Ouro/química , Ouro/administração & dosagem , Alopecia/terapia , Animais , Nanopartículas Metálicas/administração & dosagem , Células-Tronco/citologia , Inibidores de 5-alfa Redutase/administração & dosagem , Humanos , Lipossomos , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Cabelo/crescimento & desenvolvimento
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