scholarly journals Transcription Factor DLX5 Promotes Hair Follicle Stem Cell Differentiation by Regulating the c-MYC/microRNA-29c-3p/NSD1 Axis

2021 ◽  
Vol 9 ◽  
Author(s):  
Bojie Lin ◽  
Jiangying Zhu ◽  
Guoqian Yin ◽  
Mingde Liao ◽  
Guanyu Lin ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Stem Cell ◽  
Hair Follicle ◽  
Promoter Region ◽  
Cell Function ◽  
Adult Stem Cell ◽  
Stem Cell Differentiation ◽  
Model Systems ◽  
Hair Follicle Stem Cell

IntroductionAdult stem cell function has been one of the most intensively explored areas of biological and biomedical research, with hair follicle stem cells serving as one of the best model systems. This study explored the role of the transcription factor DLX5 in regulating hair follicle stem cell (HFSC) differentiation.MethodsHFSCs were isolated, characterized, and assessed for their expression of DLX5, c-MYC, NSD1, and miR-29c-3p using RT-qPCR, Western blot analysis, or immunofluorescence. Next, the ability of HFSCs to proliferate as well as differentiate into either sebaceous gland cells or epidermal cells was determined. The binding of DLX5 to the c-MYC promoter region, the binding of c-MYC to the miR-29c-3p promoter region, and the binding of miR-29c-3p to the 3′-UTR of NSD1 mRNA were verified by luciferase activity assay and ChIP experiments.ResultsDLX5 was highly expressed in differentiated HFSCs. DLX5 transcriptionally activated c-MYC expression to induce HFSC differentiation. c-MYC was able to bind the miR-29c-3p promoter and thus suppressed its expression. Without miR-29c-3p mediated suppression, NSD1 was then able to promote HFSC differentiation. These in vitro experiments suggested that DLX5 could promote HFSC differentiation via the regulation of the c-MYC/miR-29c-3p/NSD1 axis.DiscussionThis study demonstrates that DLX5 promotes HFSC differentiation by modulating the c-MYC/miR-29c-3p/NSD1 axis and identifies a new mechanism regulating HFSC differentiation.

Control of Adult Stem Cell Function in Bioengineered in vitro Niches

2008 ◽  
Author(s):  
Helen M. Blau ◽  
Matthias P. Lutolf
Keyword(s):  
Stem Cell ◽  
Cell Function ◽  
Adult Stem Cell

scholarly journals Size-controlled human adipose-derived stem cell spheroids hybridized with single-segmented nanofibers and their effect on viability and stem cell differentiation

2021 ◽  
Vol 25 (1) ◽  
Author(s):  
Jinkyu Lee ◽  
Sangmin Lee ◽  
Sung Min Kim ◽  
Heungsoo Shin
Keyword(s):  
Stem Cell ◽  
Cell Function ◽  
Average Length ◽  
Three Dimensional ◽  
Stem Cell Differentiation ◽  
Cell Spheroids ◽  
Significant Difference ◽  
Vitro Analysis ◽  
Physical And Chemical

Abstract Background Fabrication of three-dimensional stem cell spheroids have been studied to improve stem cell function, but the hypoxic core and limited penetration of nutrients and signaling cues to the interior of the spheroid were challenges. The incorporation of polymers such as silica and gelatin in spheroids resulted in relatively relaxed assembly of composite spheroids, and enhancing transport of nutrient and biological gas. However, because of the low surface area between cells and since the polymers were heterogeneously distributed throughout the spheroid, these polymers cannot increase the cell to extracellular matrix interactions needed to support differentiation. Methods We developed the stem cell spheroids that incorporate poly(ι-lactic acid) single-segmented fibers synthesized by electrospinning and physical and chemical fragmentation. The proper mixing ratio was 2000 cells/μg fibers (average length of the fibers was 50 μm - 100 μm). The SFs were coated with polydopamine to increase cell binding affinity and to synthesize various-sized spheroids. The function of spheroids was investigated by in vitro analysis depending on their sizes. For statistical analysis, Graphpad Prism 5 software (San Diego, CA, USA) was used to perform one-way analysis of variance ANOVA with Tukey’s honest significant difference test and a Student’s t-test (for two variables) (P < 0.05). Results Spheroids of different sizes were created by modulating the amount of cells and fibers (0.063 mm2–0.322 mm2). The fibers in the spheroid were homogenously distributed and increased cell viability, while cell-only spheroids showed a loss of DNA contents, internal degradation, and many apoptotic signals. Furthermore, we investigated stemness and various functions of various-sized fiber-incorporated spheroids. In conclusion, the spheroid with the largest size showed the greatest release of angiogenic factors (released VEGF: 0.111 ± 0.004 pg/ng DNA), while the smallest size showed greater effects of osteogenic differentiation (mineralized calcium: 18.099 ± 0.271 ng/ng DNA). Conclusion The spheroids incorporating polydopamine coated single-segmented fibers showed enhanced viability regardless of sizes and increased their functionality by regulating the size of spheroids which may be used for various tissue reconstruction and therapeutic applications.

scholarly journals Polyamine-controlled proliferation and protein biosynthesis are independent determinants of hair follicle stem cell fate

2020 ◽  
Author(s):  
Kira Allmeroth ◽  
Christine S. Kim ◽  
Andrea Annibal ◽  
Andromachi Pouikli ◽  
Carlos Andrés Chacón-Martínez ◽  
...  
Keyword(s):  
Stem Cell ◽  
Hair Follicle ◽  
Cell Fate ◽  
Protein Biosynthesis ◽  
Mrna Translation ◽  
Stem Cell Differentiation ◽  
List Type ◽  
Stem Cell Fate ◽  
Cell Fate Decisions ◽  
Hair Follicle Stem Cell

AbstractStem cell differentiation is accompanied by an increase in mRNA translation. The rate of protein biosynthesis is influenced by the polyamines putrescine, spermidine, and spermine that are essential for cell growth and stem cell maintenance. However, the role of polyamines as endogenous effectors of stem cell fate and whether they act through translational control remains obscure. Here, we investigated the function of polyamines in stem cell fate decisions using hair follicle stem cell (HFSC) organoids. HFSCs showed lower translation rates than progenitor cells, and a forced suppression of translation by direct targeting of the ribosome or through specific depletion of natural polyamines elevated stemness. In addition, we identified N1-acetylspermidine as a novel parallel regulator of cell fate decisions, increasing proliferation without reducing translation. Overall, this study delineates the diverse routes of polyamine metabolism-mediated regulation of stem cell fate decisions.Key PointsLow mRNA translation rates characterize hair follicle stem cell (HFSC) stateDepletion of natural polyamines enriches HFSCs via reduced translationN1-acetylspermidine promotes HFSC state without reducing translationN1-acetylspermidine expands the stem cell pool through elevated proliferation

scholarly journals Transcription Factor CTIP2 Maintains Hair Follicle Stem Cell Pool and Contributes to Altered Expression of LHX2 and NFATC1

2015 ◽  
Vol 135 (11) ◽  
pp. 2593-2602 ◽  
Author(s):  
Shreya Bhattacharya ◽  
Heather Wheeler ◽  
Mark Leid ◽  
Gitali Ganguli-Indra ◽  
Arup K. Indra
Keyword(s):  
Transcription Factor ◽  
Stem Cell ◽  
Hair Follicle ◽  
Altered Expression ◽  
Cell Pool ◽  
Hair Follicle Stem Cell ◽  
Stem Cell Pool

scholarly journals Developmental Pathways Pervade Stem Cell Responses to Evolving Extracellular Matrices of 3D Bioprinted Microenvironments

2018 ◽  
Vol 2018 ◽  
pp. 1-15
Author(s):  
Quyen A. Tran ◽  
Visar Ajeti ◽  
Brian T. Freeman ◽  
Paul J. Campagnola ◽  
Brenda M. Ogle
Keyword(s):  
Stem Cell ◽  
Cell Differentiation ◽  
Human Mesenchymal Stem Cells ◽  
Early Time ◽  
Stem Cell Differentiation ◽  
Model Systems ◽  
Ecm Remodeling ◽  
Time Points ◽  
3D Microenvironment

Developmental studies and 3D in vitro model systems show that the production and engagement of extracellular matrix (ECM) often precede stem cell differentiation. Yet, unclear is how the ECM triggers signaling events in sequence to accommodate multistep process characteristic of differentiation. Here, we employ transcriptome profiling and advanced imaging to delineate the specificity of ECM engagement to particular differentiation pathways and to determine whether specificity in this context is a function of long-term ECM remodeling. To this end, human mesenchymal stem cells (hMSCs) were cultured in 3D bioprinted prisms created from ECM proteins and associated controls. We found that exogenous ECM provided in 3D microenvironments at early time points impacts on the composition of microenvironments at later time points and that each evolving 3D microenvironment is uniquely poised to promote stem cell differentiation. Moreover, 2D cultures undergo minimal ECM remodeling and are ill-equipped to stimulate pathways associated with development.

scholarly journals Architectural Niche Organization by LHX2 is Linked to Hair Follicle Stem Cell Function

2014 ◽  
Vol 20 (S3) ◽  
pp. 1382-1383 ◽  
Author(s):  
H. Amalia Pasolli ◽  
Alicia R. Folgueras ◽  
Elaine Fuchs
Keyword(s):  
Stem Cell ◽  
Hair Follicle ◽  
Cell Function ◽  
Hair Follicle Stem Cell

Beta-catenin can induce hair follicle stem cell differentiation into transit-amplifying cells through c-myc activation

2017 ◽  
Vol 49 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Qiong Shen ◽  
Weirong Yu ◽  
Yong Fang ◽  
Min Yao ◽  
Penggao Yang
Keyword(s):  
Stem Cell ◽  
Cell Differentiation ◽  
Hair Follicle ◽  
Stem Cell Differentiation ◽  
Beta Catenin ◽  
Hair Follicle Stem Cell
Sign in / Sign up

Export Citation Format

Share Document