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Intracellular glucose starvation affects gingival homeostasis and autophagy. Sci Rep 2022; 12:1230. [PMID: 35075260 PMCID: PMC8786886 DOI: 10.1038/s41598-022-05398-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 01/11/2022] [Indexed: 12/15/2022] Open
Abstract
Human gingival fibroblasts (HGnFs) maintain periodontal tissue homeostasis through active proliferation and migration. Clinically, it is considered that the wound-healing ability of the gingival tissue is maintained even in environments with insufficient supply of nutrients, such as glucose, immediately after periodontal surgery. However, the effects of such glucose-deficient environments on HGnFs remain unclear. This study aimed to investigate the effects of low-glucose environment on HGnFs homeostasis. We evaluated gingival wound healing by examining cell proliferation and migration and collagen synthesis in HGnFs cultured in 100, 50, 25, and 0 mg/dL glucose in vitro. The cellular stress levels were determined by measuring the lactate dehydrogenase (LDH) and reactive oxygen species (ROS) levels. The glucose metabolism of HGnFs in the low-glucose concentrations was studied by measuring glucose transporter type 1 (GLUT1) mRNA expression, glucose uptake assays, lactate and ATP productions. Molecular effects were examined with a focus on the LKB1-AMPK signaling pathway. Autophagy activity in glucose-deprived HGnFs was evaluated by measuring the levels of autophagy-related proteins. Low glucose levels increased cellular stress levels, autophagy activity, and enhanced glucose metabolism through the LKB1-AMPK signaling pathway, providing more ATPs to promote wound healing. Our results regarding glucose transfer suggest the rapid healing of gingival wounds.
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Hao A, Wang Y, Zhang X, Li J, Li Y, Li D, Kulik G, Sui G. Long non-coding antisense RNA HYOU1-AS is essential to human breast cancer development through competitive binding hnRNPA1 to promote HYOU1 expression. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1868:118951. [PMID: 33422616 DOI: 10.1016/j.bbamcr.2021.118951] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 12/08/2020] [Accepted: 12/30/2020] [Indexed: 11/30/2022]
Abstract
Triple negative breast cancer (TNBC) has poor prognosis due to lack of biomarker and therapeutic target. Emerging research has revealed long noncoding RNAs (lncRNAs) are involved in breast cancer progression, but their functions and regulatory mechanisms remain poorly understood, especially in TNBC. In this study, we performed lncRNA microarray analysis of five TNBC samples and their matched normal tissues, and discovered a number of differentially expressed lncRNAs. We identified an antisense lncRNA, HYOU1-AS, which is transcribed from the opposite strand of the hypoxia up-regulated 1 (HYOU1) gene, enriched in the nucleus and highly expressed in TNBC. HYOU1-AS knockdown could inhibit the proliferation and migration of the TNBC MDA-MB-231 cells, and reduce their xenograft tumor formation in nude mice. In mechanistic studies, we found that HYOU1-AS could promote the expression of HYOU1, a proliferative gene, through competitively binding to hnRNPA1, an RNA-binding protein, to relieve its post-transcriptional inhibition of the HYOU1 mRNA. Consistently, increased HYOU1 levels correlated with poor clinical outcomes of breast cancer patients based on our study of the TCGA database. Overall, our data indicated that the lncRNA HYOU1-AS promoted TNBC progression through upregulating HYOU1.
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Affiliation(s)
- Aixin Hao
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Yu Wang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Xiao Zhang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Jialiang Li
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Yingzhou Li
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - Dangdang Li
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Science, Northeast Forestry University, Harbin 150040, China
| | - George Kulik
- Department of Life Sciences, Alfaisal University, Riyadh 11533, Saudi Arabia
| | - Guangchao Sui
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Science, Northeast Forestry University, Harbin 150040, China.
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Zhang Z, Kruglikov I, Zhao S, Zi Z, Gliniak CM, Li N, Wang M, Zhu Q, Kusminski CM, Scherer PE. Dermal adipocytes contribute to the metabolic regulation of dermal fibroblasts. Exp Dermatol 2020; 30:102-111. [DOI: 10.1111/exd.14181] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 08/19/2020] [Accepted: 08/24/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Zhuzhen Zhang
- Touchstone Diabetes Center University of Texas Southwestern Medical Center Dallas TX USA
| | | | - Shangang Zhao
- Touchstone Diabetes Center University of Texas Southwestern Medical Center Dallas TX USA
| | - Zhenzhen Zi
- Department of Biochemistry University of Texas Southwestern Medical Center Dallas TX USA
| | - Christy M. Gliniak
- Touchstone Diabetes Center University of Texas Southwestern Medical Center Dallas TX USA
| | - Na Li
- Touchstone Diabetes Center University of Texas Southwestern Medical Center Dallas TX USA
| | - May‐yun Wang
- Touchstone Diabetes Center University of Texas Southwestern Medical Center Dallas TX USA
| | - Qingzhang Zhu
- Touchstone Diabetes Center University of Texas Southwestern Medical Center Dallas TX USA
| | - Christine M. Kusminski
- Touchstone Diabetes Center University of Texas Southwestern Medical Center Dallas TX USA
| | - Philipp E. Scherer
- Touchstone Diabetes Center University of Texas Southwestern Medical Center Dallas TX USA
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Krętowski R, Borzym-Kluczyk M, Stypułkowska A, Brańska-Januszewska J, Ostrowska H, Cechowska-Pasko M. Low glucose dependent decrease of apoptosis and induction of autophagy in breast cancer MCF-7 cells. Mol Cell Biochem 2016; 417:35-47. [PMID: 27160935 PMCID: PMC4887537 DOI: 10.1007/s11010-016-2711-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 04/27/2016] [Indexed: 01/06/2023]
Abstract
Cancer cells have developed a number of adaptation mechanisms involving the signal activation of the transduction pathways, which promotes the progression and metastasis. Our results showed that the percentage of apoptotic MCF-7 cells incubated in the low glucose medium for 48 h was lower in comparison to those cultured in the high glucose medium, despite the high expression of the proapoptotic transcription factor-CHOP. Furthermore, the MCF-7 cells incubated in the low glucose medium for 48 h showed a higher expression of NF-κB p100/p52 subunits compared to cells incubated in the high glucose medium. Moreover, our findings demonstrated that the shortage of glucose strongly induces autophagy in MCF-7 cells. The activation of this process is not associated with the changes in the expression of mTOR kinase. We suggest, that the antiapoptotic chaperone ORP150 induction, transcription factor NF-κB2 activation, and increased autophagy constitute mechanisms protecting the MCF-7 cells against apoptosis.
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Affiliation(s)
- Rafał Krętowski
- Department of Pharmaceutical Biochemistry, Medical University of Białystok, Mickiewicza 2A, 15-222, Białystok, Poland
| | - Małgorzata Borzym-Kluczyk
- Department of Pharmaceutical Biochemistry, Medical University of Białystok, Mickiewicza 2A, 15-222, Białystok, Poland
| | - Anna Stypułkowska
- Department of Pharmaceutical Biochemistry, Medical University of Białystok, Mickiewicza 2A, 15-222, Białystok, Poland
| | | | - Halina Ostrowska
- Department of Biology, Medical University of Białystok, Białystok, Poland
| | - Marzanna Cechowska-Pasko
- Department of Pharmaceutical Biochemistry, Medical University of Białystok, Mickiewicza 2A, 15-222, Białystok, Poland.
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Jean J, Bernard G, Duque-Fernandez A, Auger FA, Pouliot R. Effects of Serum-Free Culture at the Air–Liquid Interface in a Human Tissue-Engineered Skin Substitute. Tissue Eng Part A 2011; 17:877-88. [DOI: 10.1089/ten.tea.2010.0256] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Jessica Jean
- Centre LOEX de l'Université Laval, Génie tissulaire et régénération: LOEX—Centre de recherche FRSQ du Centre hospitalier affilié universitaire de Québec, Québec, Canada
- Faculté de Pharmacie, Université Laval, Québec, Canada
| | - Geneviève Bernard
- Centre LOEX de l'Université Laval, Génie tissulaire et régénération: LOEX—Centre de recherche FRSQ du Centre hospitalier affilié universitaire de Québec, Québec, Canada
| | - Alexandra Duque-Fernandez
- Centre LOEX de l'Université Laval, Génie tissulaire et régénération: LOEX—Centre de recherche FRSQ du Centre hospitalier affilié universitaire de Québec, Québec, Canada
| | - François A. Auger
- Centre LOEX de l'Université Laval, Génie tissulaire et régénération: LOEX—Centre de recherche FRSQ du Centre hospitalier affilié universitaire de Québec, Québec, Canada
- Faculté de Médecine, Université Laval, Québec, Canada
| | - Roxane Pouliot
- Centre LOEX de l'Université Laval, Génie tissulaire et régénération: LOEX—Centre de recherche FRSQ du Centre hospitalier affilié universitaire de Québec, Québec, Canada
- Faculté de Pharmacie, Université Laval, Québec, Canada
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Vonk LA, Doulabi BZ, Huang CL, Helder MN, Everts V, Bank RA. Endoplasmic reticulum stress inhibits collagen synthesis independent of collagen-modifying enzymes in different chondrocyte populations and dermal fibroblasts. Biochem Cell Biol 2010; 88:539-52. [PMID: 20555395 DOI: 10.1139/o09-174] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Chondrocytes respond to glucose deprivation with a decreased collagen synthesis due to disruption of a proper functioning of the endoplasmic reticulum (ER): ER stress. Since the mechanisms involved in the decreased synthesis are unknown, we have investigated whether chaperones and collagen-modifying enzymes are affected by glucose deprivation. Chondrocytes obtained from nucleus pulposus, annulus fibrosus, articular cartilage, and meniscus and dermal fibroblasts were cultured under control conditions or exposed to the ER stress-inducing treatments of tunicamycin addition or glucose withdrawal. Both treatments resulted in an up-regulation of the gene expression of the ER stress markers in all cell types, but dermal fibroblasts showed a delayed response to glucose deprivation. Collagen gene expression was down-regulated, and less collagen protein was present in the cells under both ER stress-inducing conditions. The expression levels of the prolyl 4-hydroxylases were either not affected (P4ha3) or increased (P4ha1 and P4ha2), the levels of the lysyl hydroxylases decreased, and the N-propeptidase Adamts2 decreased. Both treatments induced apoptosis. Chondrocytes respond more quickly to glucose deprivation, but it appears that chondrocytes can cope better with tunicamycin-induced ER stress than fibroblasts. Although collagen synthesis was inhibited by the treatments, some collagen-modifying enzymes and chaperones were up-regulated, suggesting that there is no causal relation between them.
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Affiliation(s)
- Lucienne A Vonk
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Research Institute MOVE, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands
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Cechowska-Pasko M, Bańkowski E. Glucose deficiency inhibits glycosaminoglycans synthesis in fibroblast cultures. Biochimie 2010; 92:806-13. [DOI: 10.1016/j.biochi.2010.02.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2009] [Accepted: 02/19/2010] [Indexed: 11/30/2022]
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Nair A, Thevenot P, Dey J, Shen J, Sun MW, Yang J, Tang L. Novel polymeric scaffolds using protein microbubbles as porogen and growth factor carriers. Tissue Eng Part C Methods 2010; 16:23-32. [PMID: 19327002 DOI: 10.1089/ten.tec.2009.0094] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Polymeric tissue engineering scaffolds prepared by conventional techniques like salt leaching and phase separation are greatly limited by their poor biomolecule-delivery abilities. Conventional methods of incorporation of various growth factors, proteins, and/or peptides on or in scaffold materials via different crosslinking and conjugation techniques are often tedious and may affect scaffold's physical, chemical, and mechanical properties. To overcome such deficiencies, a novel two-step porous scaffold fabrication procedure has been created in which bovine serum albumin microbubbles (henceforth MB) were used as porogen and growth factor carriers. Polymer solution mixed with MB was phase separated and then lyophilized to create porous scaffold. MB scaffold triggered substantially lesser inflammatory responses than salt-leached and conventional phase-separated scaffolds in vivo. Most importantly, the same technique was used to produce insulin-like growth factor-1 (IGF-1)-eluting porous scaffolds, simply by incorporating IGF-1-loaded MB (MB-IGF-1) with polymer solution before phase separation. In vitro such MB-IGF-1 scaffolds were able to promote cell growth to a much greater extent than scaffold soaked in IGF-1, confirming the bioactivity of the released IGF-1. Further, such MB-IGF-1 scaffolds elicited IGF-1-specific collagen production in the surrounding tissue in vivo. This novel growth factor-eluting scaffold fabrication procedure can be used to deliver a range of single or combination of bioactive biomolecules to substantially promote cell growth and function in degradable scaffold.
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Affiliation(s)
- Ashwin Nair
- Department of Bioengineering, University of Texas, Arlington, TX, USA
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The effect of glucose deprivation on collagen synthesis in fibroblast cultures. Mol Cell Biochem 2009; 327:211-8. [DOI: 10.1007/s11010-009-0059-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2008] [Accepted: 02/04/2009] [Indexed: 11/25/2022]
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El-Okdi N, Smaili S, Raju V, Shidyak A, Gupta S, Fedorova L, Elkareh J, Periyasamy S, Shapiro AP, Kahaleh MB, Malhotra D, Xie Z, Chin KV, Shapiro JI. Effects of cardiotonic steroids on dermal collagen synthesis and wound healing. J Appl Physiol (1985) 2008; 105:30-6. [PMID: 18483172 DOI: 10.1152/japplphysiol.00119.2008] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
We previously reported that cardiotonic steroids stimulate collagen synthesis by cardiac fibroblasts in a process that involves signaling through the Na-K-ATPase pathway (Elkareh et al. Hypertension 49: 215-224, 2007). In this study, we examined the effect of cardiotonic steroids on dermal fibroblasts collagen synthesis and on wound healing. Increased collagen expression by human dermal fibroblasts was noted in response to the cardiotonic steroid marinobufagenin in a dose- and time-dependent fashion. An eightfold increase in collagen synthesis was noted when cells were exposed to 10 nM marinobufagenin for 24 h (P < 0.01). Similar increases in proline incorporation were seen following treatment with digoxin, ouabain, and marinobufagenin (10 nM x 24 h, all results P < 0.01 vs. control). The coadministration of the Src inhibitor PP2 or N-acetylcysteine completely prevented collagen stimulation by marinobufagenin. Next, we examined the effect of digoxin, ouabain, and marinobufagenin on the rate of wound closure in an in vitro model where human dermal fibroblasts cultures were wounded with a pipette tip and monitored by digital microscopy. Finally, we administered digoxin in an in vivo wound healing model. Olive oil was chosen as the digoxin carrier because of a favorable partition coefficient observed for labeled digoxin with saline. This application significantly accelerated in vivo wound healing in rats wounded with an 8-mm biopsy cut. Increased collagen accumulation was noted 9 days after wounding (both P < 0.01). The data suggest that cardiotonic steroids induce increases in collagen synthesis by dermal fibroblasts, as could potentially be exploited to accelerate wound healing.
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Affiliation(s)
- Nasser El-Okdi
- Department of Medicine, University of Toledo College of Medicine, 3000 Arlington Ave., Mail Stop 1186, Toledo, OH 43614-2598, USA
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