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Hair cell regeneration

Yiming Zhang, Yizhan Xing, Haiying Guo, Xiaogen Ma, Yuhong Li
The regulation of the periodic regeneration of hair follicles is complicated. Although Wnt10b has been reported to induce hair follicle regeneration, the characteristics of induced hair follicles, especially the target cells of Wnt10b, have not yet been clearly elucidated. Thus, we systematically evaluated the expression and proliferation patterns of Wnt10b-induced hair follicles. We found that Wnt10b promoted the proliferation of hair follicle stem cells from 24 hours after AdWnt10b injection. Seventy-two hours after AdWnt10b injection, cells outside of bulge area began to proliferate...
2016: International Journal of Medical Sciences
Kimihiko Sugaya, Tomohisa Hirobe, Yoshie Ishihara, Sonoe Inoue
To determine whether the effects of low-dose-rate gamma (γ) irradiation are identifiable in the regeneration of murine hair follicles, we irradiated whole bodies of C57BL/10JHir mice in the first telogen phase of the hair cycle with (137)Cs γ-rays. The mice were examined for effects on hair follicles, including number, morphology, and pigmentation in the second anagen phase. Effects of γ-radiation on melanocyte stem cells were also investigated by the indirect immunolabeling of tyrosinase-related protein 2 (TRP2)...
October 2016: Zoological Science
Min Young Lee, Seung-Hyun Bae, So-Young Chang, Jae-Hun Lee, Se-Hyung Kim, Jin-Chul Ahn, Phil-Sang Chung, Wesley Moy, Jae Yun Jung
Auditory neuropathy is a hearing disorder caused by impaired auditory nerve function. The lack of information about the pathophysiology of this disease limits early diagnosis and further treatment. Laser therapy is a novel approach to enhance nerve growth or induce axonal regeneration. We induced auditory neural degeneration sparing the sensory epithelium with local ouabain application in an animal model and observed the rescue effect of photobiomodulation (PBM), showing recovered auditory function and favorable histologic outcome...
October 28, 2016: Neuroscience Letters
Aeri Lee, Sohee Bae, Seung Hoon Lee, Oh-Kyeong Kweon, Wan Hee Kim
The purpose of this study was to investigate the protein expression pattern and the in vivo trichogenicity of dermal papilla like tissues (DPLTs) made from canine adipose-derived mesenchymal stem cells (ASCs) in athymic nude mice. Canine ASCs were isolated and cultured from adipose tissue, and differentiation was induced by culturing ASCs in dermal papilla forming media. DPLTs were embedded in collagen gel, and their structural characteristics and protein expression were evaluated by hematoxylin and eosin stain and immunohistochemistry...
September 16, 2016: Journal of Veterinary Medical Science
Simon Joost, Amit Zeisel, Tina Jacob, Xiaoyan Sun, Gioele La Manno, Peter Lönnerberg, Sten Linnarsson, Maria Kasper
The murine epidermis with its hair follicles represents an invaluable model system for tissue regeneration and stem cell research. Here we used single-cell RNA-sequencing to reveal how cellular heterogeneity of murine telogen epidermis is tuned at the transcriptional level. Unbiased clustering of 1,422 single-cell transcriptomes revealed 25 distinct populations of interfollicular and follicular epidermal cells. Our data allowed the reconstruction of gene expression programs during epidermal differentiation and along the proximal-distal axis of the hair follicle at unprecedented resolution...
September 28, 2016: Cell Systems
Michael E Smith, Andrew K Groves, Allison B Coffin
No abstract text is available yet for this article.
2016: Frontiers in Cellular Neuroscience
Kyoumi Shirai, Yuko Hamada, Nobuko Arakawa, Aiko Yamazaki, Natsuko Tohgi, Ryoichi Aki, Sumiyuki Mii, Robert M Hoffman, Yasuyuki Amoh
We have previously demonstrated that the neural stem-cell marker nestin is expressed in hair follicle stem cells located in the bulge area which are termed hair-follicle-associated pluripotent (HAP) stem cells. HAP stem cells from mouse and human could form spheres in culture, termed hair spheres, which are keratin 15-negative and CD34-positive and could differentiate to neurons, glia, keratinocytes, smooth muscle cells, and melanocytes in vitro. Subsequently, we demonstrated that nestin-expressing stem cells could effect nerve and spinal cord regeneration in mouse models...
September 14, 2016: Journal of Cellular Biochemistry
Yuyan Wei, Kai Li, Shaohua Yao, Junping Gao, Jun Li, Yanna Shang, Jie Zhang, Le Zhang, Yanyan Li, Xianming Mo, Wentong Meng, Rong Xiang, Jiankun Hu, Ping Lin, Yuquan Wei
Human zinc finger protein 32 (ZNF32) is a Cys2-His2 zinc-finger transcription factor that plays an important role in cell fate, yet much of its function remains unknown. Here, we reveal that the zebrafish ZNF32 homologue zfZNF32 is expressed in the nervous system, particularly in the lateral line system. ZfZNF32 knock-out zebrafish (zfZNF-/-) were generated using the CRISPR-associated protein 9 system. We found that the regenerative capacity of the lateral line system was increased in zfZNF-/- upon hair cell damage compared with the wild type...
September 8, 2016: Oncotarget
Agnes Rosarina Prita Sari, Nicholas Wolfgang Rufaut, Leslie Norman Jones, Rodney Daniel Sinclair
CONTEXT: The dermal papilla (DP) is a condensation of mesenchymal cells at the proximal end of the hair follicle, which determines hair shaft size and regulates matrix cell proliferation and differentiation. DP cells have the ability to regenerate new hair follicles. These cells tend to aggregate both in vitro and in vivo. This tendency is associated with the ability of papilla cells to induce hair growth. However, human papilla cells lose their hair-inducing activity in later passage number...
July 2016: International Journal of Trichology
Marziyeh Ranjbar-Mohammadi, Shahram Rabbani, S Hajir Bahrami, M T Joghataei, F Moayer
In this study we describe the potential of electrospun curcumin-loaded poly(ε-caprolactone) (PCL)/gum tragacanth (GT) (PCL/GT/Cur) nanofibers for wound healing in diabetic rats. These scaffolds with antibacterial property against methicillin resistant Staphylococcus aureus as gram positive bacteria and extended spectrum β lactamase as gram negative bacteria were applied in two forms of acellular and cell-seeded for assessing their capability in healing full thickness wound on the dorsum of rats. After 15days, pathological study showed that the application of GT/PCL/Cur nanofibers caused markedly fast wound closure with well-formed granulation tissue dominated by fibroblast proliferation, collagen deposition, complete early regenerated epithelial layer and formation of sweat glands and hair follicles...
December 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
Natacha A Agabalyan, Breanna S Borys, Holly D Sparks, Kathryn Boon, Eko W Raharjo, Sepideh Abbasi, Michael S Kallos, Jeff Biernaskie
: : Endogenous dermal stem cells (DSCs) reside in the adult hair follicle mesenchyme and can be isolated and grown in vitro as self-renewing colonies called skin-derived precursors (SKPs). Following transplantation into skin, SKPs can generate new dermis and reconstitute the dermal papilla and connective tissue sheath, suggesting they could have important therapeutic value for the treatment of skin disease (alopecia) or injury. Controlled cell culture processes must be developed to efficiently and safely generate sufficient stem cell numbers for clinical use...
September 9, 2016: Stem Cells Translational Medicine
Lingxiang Hu, Jingrong Lu, Hao Chiang, Hao Wu, Albert S B Edge, Fuxin Shi
UNLABELLED: Cochlear hair cells (HCs), the sensory cells that respond to sound, do not regenerate after damage in adult mammals, and their loss is a major cause of deafness. Here we show that HC regeneration in newborn mouse ears occurred spontaneously when the original cells were ablated by treatment with diphtheria toxin (DT) in ears that had been engineered to overexpress the DT receptor, but was not detectable when HCs were ablated in vivo by the aminoglycoside antibiotic neomycin...
September 7, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Hainan Lang, Eishi Nishimoto, Yazhi Xing, LaShardai N Brown, Kenyaria V Noble, Jeremy L Barth, Amanda C LaRue, Kiyoshi Ando, Bradley A Schulte
The peripheral auditory nerve (AN) carries sound information from sensory hair cells to the brain. The present study investigated the contribution of mouse and human hematopoietic stem cells (HSCs) to cellular diversity in the AN following the destruction of neuron cell bodies, also known as spiral ganglion neurons (SGNs). Exposure of the adult mouse cochlea to ouabain selectively killed type I SGNs and disrupted the blood-labyrinth barrier. This procedure also resulted in the upregulation of genes associated with hematopoietic cell homing and differentiation, and provided an environment conducive to the tissue engraftment of circulating stem/progenitor cells into the AN...
October 4, 2016: Molecular Therapy: the Journal of the American Society of Gene Therapy
Wu Minjuan, Xiong Jun, Shao Shiyun, Xu Sha, Ni Haitao, Wang Yue, Ji Kaihong
Early repair of skin injury and maximal restoration of the function and appearance have become important targets of clinical treatment. In the present study, we observed the healing process of skin defects in nude mice and structural characteristics of the new skin after transplantation of isolated and cultured adipose derived mesenchymal stem cells (ADMSCs) onto the human acellular amniotic membrane (AAM). The result showed that ADMSCs were closely attached to the surface of AAM and grew well 24 h after seeding...
2016: Stem Cells International
Huazheng Liang, Bassem Akladios, Cesar P Canales, Richard Francis, Edna H Hardeman, Annemiek Beverdam
The skin is essential for our survival. The outer epidermal layer consists of the interfollicular epidermis, which is a stratified squamous epithelium covering most of our body, and epidermal appendages such as the hair follicles and sweat glands. The epidermis undergoes regeneration throughout life and in response to injury. This is enabled by K14-expressing basal epidermal stem/progenitor cell populations that are tightly regulated by multiple regulatory mechanisms active within the epidermis and between epidermis and dermis...
2016: Journal of Visualized Experiments: JoVE
Wenli Ni, Shan Zeng, Wenyan Li, Yan Chen, Shasha Zhang, Mingliang Tang, Shan Sun, Renjie Chai, Huawei Li
Hair cell (HC) loss is the main cause of permanent hearing loss in mammals. Previous studies have reported that in neonatal mice cochleae, Wnt activation promotes supporting cell (SC) proliferation and Notch inhibition promotes the trans-differentiation of SCs into HCs. However, Wnt activation alone fails to regenerate significant amounts of new HCs, Notch inhibition alone regenerates the HCs at the cost of exhausting the SC population, which leads to the death of the newly regenerated HCs. Mitotic HC regeneration might preserve the SC number while regenerating the HCs, which could be a better approach for long-term HC regeneration...
August 22, 2016: Oncotarget
Jae-Hun Lee, So-Young Chang, Wesley J Moy, Connie Oh, Se-Hyung Kim, Chung-Ku Rhee, Jin-Chul Ahn, Phil-Sang Chung, Jae Yun Jung, Min Young Lee
Noise-induced hearing loss is a common type of hearing loss. The effects of laser therapy have been investigated from various perspectives, including in wound healing, inflammation reduction, and nerve regeneration, as well as in hearing research. A promising feature of the laser is its capability to penetrate soft tissue; depending on the wavelength, laser energy can penetrate into the deepest part of the body without damaging non-target soft tissues. Based on this idea, we developed bilateral transtympanic laser therapy, which uses simultaneous laser irradiation in both ears, and evaluated the effects of bilateral laser therapy on cochlear damage caused by noise overexposure...
2016: PeerJ
Meda Sandra Orasan, Iulia Ioana Roman, Andrei Coneac, Adriana Muresan, Remus Ioan Orasan
Research in the field of reversal hair loss remains a challenging subject. As Minoxidil 2% or 5% and Finasteride are so far the only FDA approved topical treatments for inducing hair regrowth, research is necessary in order to improve therapeutical approach in alopecia. In vitro studies have focused on cultures of a cell type - dermal papilla or organ culture of isolated cell follicles. In vivo research on this topic was performed on mice, rats, hamsters, rabbits, sheep and monkeys, taking into consideration the advantages and disadvantages of each animal model and the depilation options...
2016: Clujul Medical (1957)
Wenli Ni, Chen Lin, Luo Guo, Jingfang Wu, Yan Chen, Renjie Chai, Wenyan Li, Huawei Li
UNLABELLED: The generation of hair cells (HCs) from the differentiation of proliferating supporting cells (SCs) appears to be an ideal approach for replacing lost HCs in the cochlea and is promising for restoring hearing after damage to the organ of Corti. We show here that extensive proliferation of SCs followed by mitotic HC generation is achieved through a genetic reprogramming process involving the activation of β-catenin to upregulate Wnt signaling, the deletion of Notch1 to downregulate Notch signaling, and the overexpression of Atoh1 in Sox2(+) SCs in neonatal mouse cochleae...
August 17, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Muhammad Waqas, Shasha Zhang, Zuhong He, Mingliang Tang, Renjie Chai
Sensory hair cells in the inner ear are responsible for sound recognition. Damage to hair cells in adult mammals causes permanent hearing impairment because these cells cannot regenerate. By contrast, newborn mammals possess limited regenerative capacity because of the active participation of various signaling pathways, including Wnt and Notch signaling. The Wnt and Notch pathways are highly sophisticated and conserved signaling pathways that control multiple cellular events necessary for the formation of sensory hair cells...
September 2016: Frontiers of Medicine
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