Tseropoulos Georgios, Moghadasi Boroujeni Samaneh, Bajpai Vivek K, Lei Pedro, Andreadis Stelios T
Dept. of Chemical and Biological Engineering University at Buffalo Buffalo NY 14260.
Dept. of Biomedical Engineering University at Buffalo Buffalo NY 14228.
Bioeng Transl Med. 2018 Oct 1;3(3):256-264. doi: 10.1002/btm2.10109. eCollection 2018 Sep.
Neural crest (NC) cells play a central role in forming the peripheral nervous system, the craniofacial skeleton, and the pigmentation of the skin during development due to their broad multilineage differentiation potential into neurons, Schwann cells, melanocytes, and mesenchymal stem cells. Recently, we identified an easily accessible source of pluripotent NC stem cells from human inter-follicular keratinocyte (KC) cultures (KC-NC). In this work, we examined specific conditions for the derivation of NC from KC cultures. More specifically, we examined the role of two growth factors, FGF2 and IGF1, in NC proliferation and in expression of two potent NC transcription factors, Sox10 and FoxD3. Using specific chemical inhibitors, we uncovered that the downstream regulatory pathways AKT/PI3K, MEK/ERK, and JNK/cJun may be critical in Sox10 and FoxD3 regulation in KC-NC. The TGF-β1 pathway was also implicated in suppressing Sox10 expression and NC proliferation. In summary, our study shed light into the role of FGF2, IGF1, and TGF-β1 on the induction of NC from KC cultures and the pathways that regulate Sox10 and FoxD3. We also established culture conditions for sustaining KC-NC multipotency and, therefore, the potential of these cells for regenerative medicine and cellular therapies.
神经嵴(NC)细胞在发育过程中对形成外周神经系统、颅面骨骼和皮肤色素沉着起着核心作用,因为它们具有广泛的多谱系分化潜能,可分化为神经元、施万细胞、黑素细胞和间充质干细胞。最近,我们从人毛囊间角质形成细胞(KC)培养物中鉴定出一种易于获取的多能性NC干细胞来源(KC-NC)。在这项研究中,我们研究了从KC培养物中诱导NC的特定条件。更具体地说,我们研究了两种生长因子FGF2和IGF1在NC增殖以及两种强效NC转录因子Sox10和FoxD3表达中的作用。使用特定的化学抑制剂,我们发现下游调节通路AKT/PI3K、MEK/ERK和JNK/cJun可能在KC-NC中Sox10和FoxD3的调节中起关键作用。TGF-β1通路也与抑制Sox10表达和NC增殖有关。总之,我们的研究揭示了FGF2、IGF1和TGF-β1在从KC培养物中诱导NC以及调节Sox10和FoxD3的通路中的作用。我们还建立了维持KC-NC多能性的培养条件,因此,这些细胞在再生医学和细胞治疗方面具有潜力。
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