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Verma S, Lin X, Coulson-Thomas VJ. The Potential Reversible Transition between Stem Cells and Transient-Amplifying Cells: The Limbal Epithelial Stem Cell Perspective. Cells 2024; 13:748. [PMID: 38727284 PMCID: PMC11083486 DOI: 10.3390/cells13090748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/18/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
Stem cells (SCs) undergo asymmetric division, producing transit-amplifying cells (TACs) with increased proliferative potential that move into tissues and ultimately differentiate into a specialized cell type. Thus, TACs represent an intermediary state between stem cells and differentiated cells. In the cornea, a population of stem cells resides in the limbal region, named the limbal epithelial stem cells (LESCs). As LESCs proliferate, they generate TACs that move centripetally into the cornea and differentiate into corneal epithelial cells. Upon limbal injury, research suggests a population of progenitor-like cells that exists within the cornea can move centrifugally into the limbus, where they dedifferentiate into LESCs. Herein, we summarize recent advances made in understanding the mechanism that governs the differentiation of LESCs into TACs, and thereafter, into corneal epithelial cells. We also outline the evidence in support of the existence of progenitor-like cells in the cornea and whether TACs could represent a population of cells with progenitor-like capabilities within the cornea. Furthermore, to gain further insights into the dynamics of TACs in the cornea, we outline the most recent findings in other organ systems that support the hypothesis that TACs can dedifferentiate into SCs.
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Affiliation(s)
- Sudhir Verma
- College of Optometry, University of Houston, 4901 Calhoun Road, Houston, TX 77204, USA;
- Deen Dayal Upadhyaya College, University of Delhi, Delhi 110078, India
| | - Xiao Lin
- College of Optometry, University of Houston, 4901 Calhoun Road, Houston, TX 77204, USA;
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2
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Cheng D, Zhu X, Yan S, Shi L, Liu Z, Zhou X, Bi X. New insights into inflammatory memory of epidermal stem cells. Front Immunol 2023; 14:1188559. [PMID: 37325632 PMCID: PMC10264694 DOI: 10.3389/fimmu.2023.1188559] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/16/2023] [Indexed: 06/17/2023] Open
Abstract
Inflammatory memory, as one form of innate immune memory, has a wide range of manifestations, and its occurrence is related to cell epigenetic modification or metabolic transformation. When re-encountering similar stimuli, executing cells with inflammatory memory function show enhanced or tolerated inflammatory response. Studies have identified that not only hematopoietic stem cells and fibroblasts have immune memory effects, but also stem cells from various barrier epithelial tissues generate and maintain inflammatory memory. Epidermal stem cells, especially hair follicle stem cells, play an essential role in wound healing, immune-related skin diseases, and skin cancer development. In recent years, it has been found that epidermal stem cells from hair follicle can remember the inflammatory response and implement a more rapid response to subsequent stimuli. This review updates the advances of inflammatory memory and focuses on its mechanisms in epidermal stem cells. We are finally looking forward to further research on inflammatory memory, which will allow for the development of precise strategies to manipulate host responses to infection, injury, and inflammatory skin disease.
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Affiliation(s)
- Dapeng Cheng
- Department of Dermatology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Xiaochen Zhu
- Department of Dermatology, Changhai Hospital, Naval Medical University, Shanghai, China
- Department of Dermatology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Shaochen Yan
- Department of Dermatology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Linli Shi
- Department of Dermatology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Zhi Liu
- Department of Dermatology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Xin Zhou
- Department of Dermatology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Xinling Bi
- Department of Dermatology, Changhai Hospital, Naval Medical University, Shanghai, China
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3
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Shao A, Owens DM. The immunoregulatory protein CD200 as a potentially lucrative yet elusive target for cancer therapy. Oncotarget 2023; 14:96-103. [PMID: 36738455 PMCID: PMC9899099 DOI: 10.18632/oncotarget.28354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
CD200 is an immunoregulatory cell surface ligand with proven pro-tumorigenic credentials via its ability to suppress CD200 receptor (CD200R)-expressing anti-tumor immune function. This definitive role for the CD200-CD200R axis in regulating an immunosuppressive tumor microenvironment has garnered increasing interest in CD200 as a candidate target for immune checkpoint inhibition therapy. However, while the CD200 blocking antibody samalizumab is still in the early stages of clinical testing, alternative mechanisms for the pro-tumorigenic role of CD200 have recently emerged that extend beyond direct suppression of anti-tumor T cell responses and, as such, may not be susceptible to CD200 antibody blockade. Herein, we will summarize the current understanding of CD200 expression and function in the tumor microenvironment as well as alternative strategies for potential neutralization of multiple CD200 mechanisms in human cancers.
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Affiliation(s)
- Anqi Shao
- 1Department of Dermatology, Columbia University Irving Medical Center, Vagelos College of Physicians and Surgeons, New York, NY 10032, USA
| | - David M. Owens
- 1Department of Dermatology, Columbia University Irving Medical Center, Vagelos College of Physicians and Surgeons, New York, NY 10032, USA,2Department of Pathology and Cell Biology, Columbia University Irving Medical Center, Vagelos College of Physicians and Surgeons, New York, NY 10032, USA,Correspondence to:David M. Owens, email:
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4
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Lotti R, Palazzo E, Quadri M, Dumas M, Schnebert S, Biondini D, Bianchini MA, Nizard C, Pincelli C, Marconi A. Isolation of an "Early" Transit Amplifying Keratinocyte Population in Human Epidermis: A Role for the Low Affinity Neurotrophin Receptor CD271. Stem Cells 2022; 40:1149-1161. [PMID: 36037263 PMCID: PMC9806768 DOI: 10.1093/stmcls/sxac060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 08/16/2022] [Indexed: 01/12/2023]
Abstract
In the interfollicular epidermis (IFE), stem cells (KSC) generate transit amplifying (TA) cells that, after symmetric divisions, produce differentiating daughters. Here, we isolated and characterized the highly proliferative interfollicular epidermal basal cell population "early" TA (ETA) cells, based on their capacity to adhere to type IV collagen. Proliferation and colony-forming efficiency in ETA cells are lower than in KSC but higher than in "late" TA (LTA). Stemness, proliferation, and differentiation markers confirmed that ETA cells display a unique phenotype. Skin reconstructs derived from ETA cells present different features (epidermal thickness, Ki67, and Survivin expression), as compared to skin equivalents generated from either KSC or LTA cells. The low-affinity neurotrophin receptor CD271, which regulates the KSC to TA cell transition in the human epidermis through an on/off switch control mechanism, is predominantly expressed in ETA cells. Skin equivalents generated from siRNA CD271 ETA cells display a more proliferative and less differentiated phenotype, as compared to mock-derived reconstructs. Consistently, CD271 overexpression in LTA cells generates a more proliferative skin equivalent than mock LTA cells. Finally, the CD271 level declines with cellular senescence, while it induces a delay in p16INK4 expression. We conclude that ETA cells represent the first KSC progenitor with exclusive features. CD271 identifies and modulates ETA cells, thus participating in the early differentiation and regenerative capacity of the human epidermis.
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Affiliation(s)
- Roberta Lotti
- DermoLab, Department of Surgical, Medical, Dental and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Elisabetta Palazzo
- DermoLab, Department of Surgical, Medical, Dental and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Marika Quadri
- DermoLab, Department of Surgical, Medical, Dental and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Marc Dumas
- LVMH Recherche, Life Sciences Department, Saint Jean de Braye, France
| | | | - Diego Biondini
- Pediatric Surgery Unit, Department of Pediatric Surgery, University of Modena and Reggio Emilia, Modena, Italy
| | - Maria Anastasia Bianchini
- Pediatric Surgery Unit, Department of Pediatric Surgery, University of Modena and Reggio Emilia, Modena, Italy
| | - Carine Nizard
- LVMH Recherche, Life Sciences Department, Saint Jean de Braye, France
| | - Carlo Pincelli
- DermoLab, Department of Surgical, Medical, Dental and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Alessandra Marconi
- Corresponding author: Alessandra Marconi, MSc in Biology, Specialist in Clinical Pathology, DermoLab, Department of Surgical, Medical, Dental and Morphological Sciences, University of Modena and Reggio Emilia, Via Del Pozzo 71, 41124 Modena, Italy. Tel: +39 059 4222812; Fax: +39 059 4224271;
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5
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Klingenstein S, Klingenstein M, Kleger A, Liebau S. From Hair to iPSCs-A Guide on How to Reprogram Keratinocytes and Why. ACTA ACUST UNITED AC 2020; 55:e121. [PMID: 32956569 DOI: 10.1002/cpsc.121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Keratinocytes, as a primary somatic cell source, offer exceptional advantages compared to fibroblasts, which are commonly used for reprogramming. Keratinocytes can beat fibroblasts in reprogramming efficiency and reprogramming time and, in addition, can be easily and non-invasively harvested from human hair roots. However, there is still much to know about acquiring keratinocytes and maintaining them in cell culture. In this article, we want to offer readers the profound knowledge that we have gained since our initial use of keratinocytes for reprogramming more than 10 years ago. Here, all hints and tricks, from plucking the hair roots to growing and maintaining keratinocytes, are described in detail. Additionally, an overview of the currently used reprogramming methods, viral and non-viral, is included, with a special focus on their applicability to keratinocytes. This overview is intended to provide a brief but comprehensive insight into the field of keratinocytes and their use for reprogramming into induced pluripotent stem cells (iPSCs). © 2020 The Authors.
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Affiliation(s)
- Stefanie Klingenstein
- Institute of Neuroanatomy & Developmental Biology, Eberhard-Karls University Tübingen, Tübingen, Germany
| | - Moritz Klingenstein
- Institute of Neuroanatomy & Developmental Biology, Eberhard-Karls University Tübingen, Tübingen, Germany
| | - Alexander Kleger
- Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
| | - Stefan Liebau
- Institute of Neuroanatomy & Developmental Biology, Eberhard-Karls University Tübingen, Tübingen, Germany
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6
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Miyachi K, Yamada T, Kawagishi-Hotta M, Hasebe Y, Date Y, Hasegawa S, Arima M, Iwata Y, Kobayashi T, Numata S, Yamamoto N, Nakata S, Sugiura K, Akamatsu H. Extracellular proteoglycan decorin maintains human hair follicle stem cells. J Dermatol 2018; 45:1403-1410. [PMID: 30320452 DOI: 10.1111/1346-8138.14678] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 09/03/2018] [Indexed: 12/30/2022]
Abstract
Hair follicle stem cells (HFSC) are localized in the bulge region of the hair follicle and play a role in producing hair. Recently, it has been shown that the number of HFSC decreases with age, which is thought to be a cause of senile alopecia. Therefore, maintaining HFSC may be key for the prevention of age-related hair loss, but the regulatory mechanisms of HFSC and the effects of aging on them are largely unknown. In general, stem cells are known to require regulatory factors in the pericellular microenvironment, termed the stem cell niche, to maintain their cell function. In this study, we focused on the extracellular matrix proteoglycan decorin (DCN) as a candidate factor for maintaining the human HFSC niche. Gene expression analysis showed that DCN was highly expressed in the bulge region. We observed decreases in DCN expression as well as the number of KRT15-positive HFSC with age. In vitro experiments with human plucked hair-derived HFSC revealed that HFSC lost their undifferentiated state with increasing passages, and prior to this change a decrease in DCN expression was observed. Furthermore, knockdown of DCN promoted HFSC differentiation. In contrast, when HFSC were cultured on DCN-coated plates, they showed an even more undifferentiated state. From these results, as a novel mechanism for maintaining HFSC, it was suggested that DCN functions as a stem cell niche component, and that the deficit of HFSC maintenance caused by a reduction in DCN expression could be a cause of age-related hair loss.
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Affiliation(s)
- Katsuma Miyachi
- Research Laboratories, Nippon Menard Cosmetic Co., Ltd, Nagoya, Japan
| | - Takaaki Yamada
- Research Laboratories, Nippon Menard Cosmetic Co., Ltd, Nagoya, Japan.,Department of Applied Cell and Regenerative Medicine, Fujita Health University School of Medicine, Toyoake, Japan.,Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Mika Kawagishi-Hotta
- Research Laboratories, Nippon Menard Cosmetic Co., Ltd, Nagoya, Japan.,Department of Applied Cell and Regenerative Medicine, Fujita Health University School of Medicine, Toyoake, Japan.,Nagoya University-MENARD Collaborative Chair, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yuichi Hasebe
- Research Laboratories, Nippon Menard Cosmetic Co., Ltd, Nagoya, Japan.,Nagoya University-MENARD Collaborative Chair, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasushi Date
- Research Laboratories, Nippon Menard Cosmetic Co., Ltd, Nagoya, Japan.,Nagoya University-MENARD Collaborative Chair, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Seiji Hasegawa
- Research Laboratories, Nippon Menard Cosmetic Co., Ltd, Nagoya, Japan.,Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan.,Nagoya University-MENARD Collaborative Chair, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masaru Arima
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Yohei Iwata
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Tsukane Kobayashi
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Shigeki Numata
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Naoki Yamamoto
- Laboratory of Molecular Biology and Histochemistry, Joint Research Support Promotion Facility, Center for Research Promotion and Support, Fujita Health University, Toyoake, Japan
| | - Satoru Nakata
- Research Laboratories, Nippon Menard Cosmetic Co., Ltd, Nagoya, Japan
| | - Kazumitsu Sugiura
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Hirohiko Akamatsu
- Department of Applied Cell and Regenerative Medicine, Fujita Health University School of Medicine, Toyoake, Japan
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7
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Surface chemistry induces mitochondria-mediated apoptosis of breast cancer cells via PTEN/PI3K/AKT signaling pathway. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2018; 1865:172-185. [DOI: 10.1016/j.bbamcr.2017.10.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/17/2017] [Accepted: 10/13/2017] [Indexed: 01/31/2023]
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8
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Petpiroon N, Sritularak B, Chanvorachote P. Phoyunnanin E inhibits migration of non-small cell lung cancer cells via suppression of epithelial-to-mesenchymal transition and integrin αv and integrin β3. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 17:553. [PMID: 29284478 PMCID: PMC5747023 DOI: 10.1186/s12906-017-2059-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 12/12/2017] [Indexed: 01/17/2023]
Abstract
BACKGROUND The conversion of the epithelial phenotype of cancer cells into cells with a mesenchymal phenotype-so-called epithelial-mesenchymal transition (EMT)-has been shown to enhance the capacity of the cells to disseminate throughout the body. EMT is therefore becoming a potential target for anti-cancer drug discovery. Here, we showed that phoyunnanin E, a compound isolated from Dendrobium venustum, possesses anti-migration activity and addressed its mechanism of action. METHODS The cytotoxic and proliferative effects of phoyunnanin E on human non-small cell lung cancer-derived H460, H292, and A549 cells and human keratinocyte HaCaT cells were investigated by MTT assay. The effect of phoyunnanin E on EMT was evaluated by determining the colony formation and EMT markers. The migration and invasion of H460, H292, A549 and HaCaT cells was evaluated by wound healing assay and transwell invasion assay, respectively. EMT markers, integrins and migration-associated proteins were examined by western blot analysis. RESULTS Phoyunnanin E at the concentrations of 5 and 10 μM, which are non-toxic to H460, H292, A549 and HaCaT cells showed good potential to inhibit the migratory activity of three types of human lung cancer cells. The anti-migration effect of phoyunnanin E was shown to relate to the suppressed EMT phenotypes, including growth in anchorage-independent condition, cell motility, and EMT-specific protein markers (N-cadherin, vimentin, slug, and snail). In addition to EMT suppression, we found that phoyunnanin E treatment with 5 and 10 μM could decrease the cellular level of integrin αv and integrin β3, these integrins are frequently up-regulated in highly metastatic tumor cells. We further characterized the regulatory proteins in cell migration and found that the cells treated with phoyunnanin E exhibited a significantly lower level of phosphorylated focal adhesion kinase (p-FAK) and phosphorylated ATP-dependent tyrosine kinase (p-AKT), and their downstream effectors (including Ras-related C3 botulinum (Rac-GTP); Cell division cycle 42 (Cdc42); and Ras homolog gene family, member A (Rho-GTP)) in comparison to those of the non-treated control. CONCLUSIONS We have determined for the first time that phoyunnanin E could inhibit the motility of lung cancer cells via the suppression of EMT and metastasis-related integrins. This new information could support further development of this compound for anti-metastasis approaches.
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Goichberg P. Current Understanding of the Pathways Involved in Adult Stem and Progenitor Cell Migration for Tissue Homeostasis and Repair. Stem Cell Rev Rep 2017; 12:421-37. [PMID: 27209167 DOI: 10.1007/s12015-016-9663-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
With the advancements in the field of adult stem and progenitor cells grows the recognition that the motility of primitive cells is a pivotal aspect of their functionality. There is accumulating evidence that the recruitment of tissue-resident and circulating cells is critical for organ homeostasis and effective injury responses, whereas the pathobiology of degenerative diseases, neoplasm and aging, might be rooted in the altered ability of immature cells to migrate. Furthermore, understanding the biological machinery determining the translocation patterns of tissue progenitors is of great relevance for the emerging methodologies for cell-based therapies and regenerative medicine. The present article provides an overview of studies addressing the physiological significance and diverse modes of stem and progenitor cell trafficking in adult mammalian organs, discusses the major microenvironmental cues regulating cell migration, and describes the implementation of live imaging approaches for the exploration of stem cell movement in tissues and the factors dictating the motility of endogenous and transplanted cells with regenerative potential.
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Affiliation(s)
- Polina Goichberg
- Department Anesthesiology, Perioperative and Pain Medicine, Harvard Medical School, Brigham and Women's Hospital, 75 Francis Street, Boston, MA, 02115, USA.
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10
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Characterisation of cell cycle arrest and terminal differentiation in a maximally proliferative human epithelial tissue: Lessons from the human hair follicle matrix. Eur J Cell Biol 2017; 96:632-641. [PMID: 28413121 DOI: 10.1016/j.ejcb.2017.03.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/30/2017] [Accepted: 03/30/2017] [Indexed: 12/31/2022] Open
Abstract
Human hair follicle (HF) growth and hair shaft formation require terminal differentiation-associated cell cycle arrest of highly proliferative matrix keratinocytes. However, the regulation of this complex event remains unknown. CIP/KIP family member proteins (p21CIP1, p27KIP1 and p57KIP2) regulate cell cycle progression/arrest, endoreplication, differentiation and apoptosis. Since they have not yet been adequately characterized in the human HF, we asked whether and where CIP/KIP proteins localise in the human hair matrix and pre-cortex in relation to cell cycle activity and HF-specific epithelial cell differentiation that is marked by keratin 85 (K85) protein expression. K85 expression coincided with loss or reduction in cell cycle activity markers, including in situ DNA synthesis (EdU incorporation), Ki-67, phospho-histone H3 and cyclins A and B1, affirming a post-mitotic state of pre-cortical HF keratinocytes. Expression of CIP/KIP proteins was found abundantly within the proliferative hair matrix, concomitant with a role in cell cycle checkpoint control. p21CIP1, p27KIP1 and cyclin E persisted within post-mitotic keratinocytes of the pre-cortex, whereas p57KIP2 protein decreased but became nuclear. These data imply a supportive role for CIP/KIP proteins in maintaining proliferative arrest, differentiation and anti-apoptotic pathways, promoting continuous hair bulb growth and hair shaft formation in anagen VI. Moreover, post-mitotic hair matrix regions contained cells with enlarged nuclei, and DNA in situ hybridisation showed cells that were >2N in the pre-cortex. This suggests that CIP/KIP proteins might counterbalance cyclin E to control further rounds of DNA replication in a cell population that has a propensity to become tetraploid. These data shed new light on the in situ-biography of human hair matrix keratinocytes on their path of active cell cycling, arrest and terminal differentiation, and showcase the human HF as an excellent, clinically relevant model system for cell cycle physiology research of human epithelial cells within their natural tissue habitat.
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11
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Ngamsri KC, Müller A, Bösmüller H, Gamper-Tsigaras J, Reutershan J, Konrad FM. The Pivotal Role of CXCR7 in Stabilization of the Pulmonary Epithelial Barrier in Acute Pulmonary Inflammation. THE JOURNAL OF IMMUNOLOGY 2017; 198:2403-2413. [PMID: 28188248 DOI: 10.4049/jimmunol.1601682] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 01/12/2017] [Indexed: 11/19/2022]
Abstract
Acute pulmonary inflammation is still a frightening complication in intensive care units and has a high mortality. Specific treatment is not available, and many details of the pathomechanism remain unclear. The recently discovered chemokine receptor CXCR7 and its ligand stromal cell-derived factor (SDF)-1 are known to be involved in inflammation. We chose to investigate the detailed role of CXCR7 in a murine model of LPS inhalation. Inflammation increased pulmonary expression of CXCR7, and the receptor was predominantly expressed on pulmonary epithelium and on polymorphonuclear neutrophil (PMNs) after transepithelial migration into the alveolar space. Specific inhibition of CXCR7 reduced transepithelial PMN migration by affecting the expression of adhesion molecules. CXCR7 antagonism reduced the most potent PMN chemoattractants CXCL1 and CXCL2/3. After inhibiting CXCR7, NF-κB phosphorylation was reduced in lungs of mice, tight junction formation increased, and protein concentration in the bronchoalveolar lavage diminished, showing the impact of CXCR7 on stabilizing microvascular permeability. In vitro studies with human cells confirmed the pivotal role of CXCR7 in pulmonary epithelium. Immunofluorescence of human lungs confirmed our in vivo data and showed an increase of the expression of CXCR7 in pulmonary epithelium. Highlighting the clinical potential of CXCR7 antagonism, nebulization of the agent before and after the inflammation showed impressive anti-inflammatory effects. Additional CXCR7 inhibition potentiated the effect of SDF-1 antagonism, most probably by downregulating SDF-1 and the second receptor of the chemokine (CXCR4) expression. In conclusion, our data identified the pivotal role of the receptor CXCR7 in pulmonary inflammation with a predominant effect on the pulmonary epithelium and PMNs.
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Affiliation(s)
- Kristian-Christos Ngamsri
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Tübingen, 72076 Tübingen, Germany
| | - Anika Müller
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Tübingen, 72076 Tübingen, Germany
| | - Hans Bösmüller
- Department of Pathology, University Hospital of Tübingen, 72076 Tübingen, Germany; and
| | - Jutta Gamper-Tsigaras
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Tübingen, 72076 Tübingen, Germany
| | - Jörg Reutershan
- Department of Anesthesiology and Intensive Care Medicine, Bayreuth Hospital, 95445 Bayreuth, Germany
| | - Franziska M Konrad
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Tübingen, 72076 Tübingen, Germany;
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12
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Rittié L, Farr EA, Orringer JS, Voorhees JJ, Fisher GJ. Reduced cell cohesiveness of outgrowths from eccrine sweat glands delays wound closure in elderly skin. Aging Cell 2016; 15:842-52. [PMID: 27184009 PMCID: PMC5013029 DOI: 10.1111/acel.12493] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/29/2016] [Indexed: 01/03/2023] Open
Abstract
Human skin heals more slowly in aged vs. young adults, but the mechanism for this delay is unclear. In humans, eccrine sweat glands (ESGs) and hair follicles underlying wounds generate cohesive keratinocyte outgrowths that expand to form the new epidermis. Here, we compared the re‐epithelialization of partial‐thickness wounds created on the forearm of healthy young (< 40 yo) and aged (> 70 yo) adults. Our results confirm that the outgrowth of cells from ESGs is a major feature of repair in young skin. Strikingly, in aged skin, although ESG density is unaltered, less than 50% of the ESGs generate epithelial outgrowths during repair (vs. 100% in young). Surprisingly, aging does not alter the wound‐induced proliferation response in hair follicles or ESGs. Instead, there is an overall reduced cohesiveness of keratinocytes in aged skin. Reduced cell–cell cohesiveness was most obvious in ESG‐derived outgrowths that, when present, were surrounded by unconnected cells in the scab overlaying aged wounds. Reduced cell–cell contact persisted during the repair process, with increased intercellular spacing and reduced number of desmosomes. Together, reduced outgrowths of ESG (i) reduce the initial number of cells participating in epidermal repair, (ii) delay wound closure, and (iii) lead to a thinner repaired epidermis in aged vs. young skin. Failure to form cohesive ESG outgrowths may reflect impaired interactions of keratinocytes with the damaged ECM in aged skin. Our findings provide a framework to better understand the mediators of delayed re‐epithelialization in aging and further support the importance of ESGs for the repair of human wounds.
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Affiliation(s)
- Laure Rittié
- Department of Dermatology University of Michigan Medical School Ann Arbor MI USA
| | - Elyssa A. Farr
- Department of Dermatology University of Michigan Medical School Ann Arbor MI USA
| | - Jeffrey S. Orringer
- Department of Dermatology University of Michigan Medical School Ann Arbor MI USA
| | - John J. Voorhees
- Department of Dermatology University of Michigan Medical School Ann Arbor MI USA
| | - Gary J. Fisher
- Department of Dermatology University of Michigan Medical School Ann Arbor MI USA
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13
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Gao G, He J, Nong L, Xie H, Huang Y, Xu N, Zhou D. Periodic mechanical stress induces the extracellular matrix expression and migration of rat nucleus pulposus cells by upregulating the expression of intergrin α1 and phosphorylation of downstream phospholipase Cγ1. Mol Med Rep 2016; 14:2457-64. [PMID: 27484337 PMCID: PMC4991676 DOI: 10.3892/mmr.2016.5549] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 07/08/2016] [Indexed: 01/07/2023] Open
Abstract
Intervertebral disk degeneration (IDD) is a major cause of low back pain and an important socioeconomic burden. Degradation of the extracellular matrix (ECM) of nucleus pulposus (NP) cells in the interverterbal disk is important for IDD. Stress of a suitable frequency and amplitude promotes the synthesis of the ECM of NP cells, however, the associated mechanisms remain to be fully elucidated The present study aimed to investigate the effect of integrin α1 on the migration and ECM synthesis of NP cells under soft periodic mechanical stress. Rat NP cells were isolated and plated onto slides, and were then treated with or without the use of a periodic mechanical stress system. The expression levels of integrin α1, α5 and αv, ECM collagen 2A1 (Col2A1) and aggrecan, and the phosphorylation of phospholipase C-γ1 (PLCγ1) were measured using reverse transcription-quantitative polymerase chain reaction and western blot analyses. Cell migration was assayed using a scratch experiment. The results showed that exposure to periodic mechanical stress significantly induced the mRNA expression levels of Col2A1 and aggrecan, cell migration, mRNA expression of integrin α1 and phosphorylation of PLC-γ1 of the NP, compared with the control (P<0.05). Inhibition of the PLCγ1 protein by U73122 significantly decreased the ECM expression under periodic mechanical stress (P<0.05). Small interfering RNA-mediated integrin α1 gene knockdown suppressed the mRNA expression levels of Col2A1 and aggrecan, and suppressed the migration and phosphorylation of PLCγ1 of the NP cells under periodic mechanical stress, compared with the control (P<0.05). In conclusion, periodic mechanical stress induced ECM expression and the migration of NP cells via upregulating the expression of integrin α1 and the phosphorylation of downstream PLCγ1. These findings provide novel information to aid the understanding of the pathogenesis and development of IDD.
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Affiliation(s)
- Gongming Gao
- Department of Orthopedics, Changzhou Second Hospital Affiliated to Nanjing Medical University, Changzhou, Jiangsu 213003, P.R. China
| | - Jin He
- Department of Orthopedics, Jintan People's Hospital Affiliated to Jiangsu University, Jintan, Jiangsu 213200, P.R. China
| | - Luming Nong
- Department of Orthopedics, Changzhou Second Hospital Affiliated to Nanjing Medical University, Changzhou, Jiangsu 213003, P.R. China
| | - Hua Xie
- Department of Orthopedics, Jintan People's Hospital Affiliated to Jiangsu University, Jintan, Jiangsu 213200, P.R. China
| | - Yongjing Huang
- Department of Orthopedics, Changzhou Second Hospital Affiliated to Nanjing Medical University, Changzhou, Jiangsu 213003, P.R. China
| | - Nanwei Xu
- Department of Orthopedics, Changzhou Second Hospital Affiliated to Nanjing Medical University, Changzhou, Jiangsu 213003, P.R. China
| | - Dong Zhou
- Department of Orthopedics, Changzhou Second Hospital Affiliated to Nanjing Medical University, Changzhou, Jiangsu 213003, P.R. China
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14
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Purba TS, Brunken L, Hawkshaw NJ, Peake M, Hardman J, Paus R. A primer for studying cell cycle dynamics of the human hair follicle. Exp Dermatol 2016; 25:663-8. [PMID: 27094702 DOI: 10.1111/exd.13046] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/17/2016] [Indexed: 12/28/2022]
Abstract
The cell cycle is of major importance to human hair follicle (HF) biology. Not only is continuously active cell cycling required to facilitate healthy hair growth in anagen VI HFs, but perturbations in the cell cycle are likely to be of significance in HF pathology (i.e. in scarring, non-scarring, chemotherapy-induced and androgenic alopecias). However, cell cycle dynamics of the human hair follicle (HF) are poorly understood in contrast to what is known in mouse. The current Methods Review aims at helping to close this gap by presenting a primer that introduces immunohistological/immunofluorescent techniques to study the cell cycle in the human HF. Moreover, this primer encourages the exploitation of the human HF as a powerful and clinically relevant tool to investigate mammalian cell cycle biology in situ. To achieve this, we describe methods to study markers of general 'proliferation' (nuclei count, Ki-67 expression), apoptosis (terminal deoxynucleotidyl transferase dUTP nick-end labelling, cleaved caspase 3), mitosis (phospho-histone H3, 'pS780'), DNA synthesis (5-ethynyl-2'-deoxyuridine) and cell cycle regulation (cyclins) in the human HF. In addition, we provide specific examples of dual immunolabelling for instructive cell cycle analyses and for investigating the cell cycle behaviour of specific HF keratinocyte subpopulations, such as keratin 15+ stem/progenitor cells.
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Affiliation(s)
- Talveen S Purba
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK
| | - Lars Brunken
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK.,Department of Dermatology, Venerology and Allergy, Charité University Medicine Berlin, Berlin, Germany
| | - Nathan J Hawkshaw
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK
| | - Michael Peake
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK.,BSc Programme Biological Sciences, University of Huddersfield, Huddersfield, UK
| | - Jonathan Hardman
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK
| | - Ralf Paus
- Centre for Dermatology Research, Institute of Inflammation and Repair, University of Manchester, Manchester, UK.,Department of Dermatology, University of Münster, Münster, Germany
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15
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Isolation and characterization of hair follicle stem cells from Arbas Cashmere goat. Cytotechnology 2016; 68:2579-2588. [PMID: 27193423 DOI: 10.1007/s10616-016-9981-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 05/04/2016] [Indexed: 10/21/2022] Open
Abstract
In this study, highly purified hair follicle stem cells from Arbas Cashmere goat (gHFSCs) were isolated using enzyme digestion and adhesion to type IV collagen. The biological characteristics of the gHFSCs were identified by morphological observation, growth curve, markers assay and differentiation in vitro. The gHFSCs were in small cell size with typical cobblestone morphology, good adhesion and high refractive index. Immunocytochemistry staining showed the cells were expressing Krt15, Krt19, CD34, Itgβ1 and Krt14. Cell growth curve indicated that cultured gHFSCs had strong proliferation ability. Krt14 and CD34 were high expressed at the mRNA level, respectively, 39.68 and 24.37 times of the Cashmere goat keratinocytes, and krt15 expression was 5.62 times and itgβ1 expression was 1.81 times higher (p < 0.01). Western blot detected the expression of all the above markers. After osteogenic induction, the cells were positive for Von Kossa staining and expressed Osteocalcin. Sulfated proteoglycans in cartilaginous matrices were positively stained by Alcian blue after chondrogenic induction and COL2A1 was expressed. In myogenic induction, Hoechst 33342 staining evidenced cytoplasm fusion and positive expression of MyoG was detected by immunocytochemistry.
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16
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You J, Roh KB, Li Z, Liu G, Tang J, Shin S, Park D, Jung E. The Antiaging Properties of Andrographis paniculata by Activation Epidermal Cell Stemness. Molecules 2015; 20:17557-69. [PMID: 26402665 PMCID: PMC6332002 DOI: 10.3390/molecules200917557] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 09/16/2015] [Accepted: 09/17/2015] [Indexed: 11/16/2022] Open
Abstract
Andrographis paniculata (A. paniculata, Chuanxinlian), a medicinal herb with an extremely bitter taste that is native to China and other parts of Southeast Asia, possesses immense therapeutic value; however, its therapeutic properties have rarely been applied in the field of skin care. In this study, we investigated the effect of an A. paniculata extract (APE) on human epidermal stem cells (EpSCs), and confirmed its anti-aging effect through in vitro, ex vivo, and in vivo study. An MTT assay was used to determine cell proliferation. A flow cytometric analysis, with propidium iodide, was used to evaluate the cell cycle. The expression of integrin β1 (CD29), the stem cell marker, was detected with antibodies, using flow cytometry in vitro, and immunohistochemical assays in ex vivo. Type 1 collagen and VEGF (vascular endothelial growth factor) were measured using an enzyme-linked immunosorbent assay (ELISA). During the clinical study, skin hydration, elasticity, wrinkling, sagging, and dermal density were evaluated before treatment and at four and eight weeks after the treatment with the test product (containing the APE) on the face. The proliferation of the EpSCs, treated with the APE, increased significantly. In the cell cycle analysis, the APE increased the G2/M and S stages in a dose-dependent manner. The expression of integrin β1, which is related to epidermal progenitor cell expansion, was up-regulated in the APE-treated EpSCs and skin explants. In addition, the production of VEGF in the EpSCs increased significantly in response to the APE treatment. Consistent with these results, the VEGF and APE-treated EpSCs conditioned medium enhanced the Type 1 collagen production in normal human fibroblasts (NHFs). In the clinical study, the APE improved skin hydration, dermal density, wrinkling, and sagging significantly. Our findings revealed that the APE promotes a proliferation of EpSCs, through the up-regulation of the integrin β1 and VEGF expression. The VEGF might affect the collagen synthesis of NHF as a paracrine factor. Clinical studies further suggested that treatment with formulations containing APE confers anti-aging benefits. Based on these results, we suggest that APE may be introduced as a possible anti-aging agent.
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Affiliation(s)
- Jiyoung You
- Biospectrum Life Science Institute, Sangdaewon-Dong, Seongnam-City, Gyeonggi-Do 442-13, Korea.
| | - Kyung-Baeg Roh
- Biospectrum Life Science Institute, Sangdaewon-Dong, Seongnam-City, Gyeonggi-Do 442-13, Korea.
| | - Zidan Li
- Infinitus, Rm 102 PCI Business Building, No. 66 Jiangzhong Road, Tianhe District, Guangzhou 510665, China.
| | - Guangrong Liu
- Infinitus, Rm 102 PCI Business Building, No. 66 Jiangzhong Road, Tianhe District, Guangzhou 510665, China.
| | - Jian Tang
- Infinitus, Rm 102 PCI Business Building, No. 66 Jiangzhong Road, Tianhe District, Guangzhou 510665, China.
| | - Seoungwoo Shin
- Biospectrum Life Science Institute, Sangdaewon-Dong, Seongnam-City, Gyeonggi-Do 442-13, Korea.
| | - Deokhoon Park
- Biospectrum Life Science Institute, Sangdaewon-Dong, Seongnam-City, Gyeonggi-Do 442-13, Korea.
| | - Eunsun Jung
- Biospectrum Life Science Institute, Sangdaewon-Dong, Seongnam-City, Gyeonggi-Do 442-13, Korea.
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17
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Purba TS, Haslam IS, Poblet E, Jiménez F, Gandarillas A, Izeta A, Paus R. Human epithelial hair follicle stem cells and their progeny: current state of knowledge, the widening gap in translational research and future challenges. Bioessays 2014; 36:513-25. [PMID: 24665045 DOI: 10.1002/bies.201300166] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Epithelial hair follicle stem cells (eHFSCs) are required to generate, maintain and renew the continuously cycling hair follicle (HF), supply cells that produce the keratinized hair shaft and aid in the reepithelialization of injured skin. Therefore, their study is biologically and clinically important, from alopecia to carcinogenesis and regenerative medicine. However, human eHFSCs remain ill defined compared to their murine counterparts, and it is unclear which murine eHFSC markers really apply to the human HF. We address this by reviewing current concepts on human eHFSC biology, their immediate progeny and their molecular markers, focusing on Keratin 15 and 19, CD200, CD34, PHLDA1, and EpCAM/Ber-EP4. After delineating how human eHFSCs may be selectively targeted experimentally, we close by defining as yet unmet key challenges in human eHFSC research. The ultimate goal is to transfer emerging concepts from murine epithelial stem cell biology to human HF physiology and pathology.
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Affiliation(s)
- Talveen S Purba
- The Dermatology Centre, Salford Royal NHS Foundation Trust and Institute of Inflammation and Repair, University of Manchester, Manchester, United Kingdom
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