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Liu HG, Luo M. [Diagnosis and treatment of obstructive sleep apnea and endocrine diseases]. ZHONGHUA JIE HE HE HU XI ZA ZHI = ZHONGHUA JIEHE HE HUXI ZAZHI = CHINESE JOURNAL OF TUBERCULOSIS AND RESPIRATORY DISEASES 2019; 42:602-604. [PMID: 31378022 DOI: 10.3760/cma.j.issn.1001-0939.2019.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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Ding N, Luo M, Liao XL, Bao QY, Li RY, Wu B. MicroRNA-378 promotes the malignant progression of oral squamous cell carcinoma by mediating FOXN3. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2019; 23:6202-6210. [PMID: 31364120 DOI: 10.26355/eurrev_201907_18437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This study aimed to detect the expression of microRNA-378 in OSCC, and further studies its effects on clinicopathology and prognosis of OSCC patients. PATIENTS AND METHODS Real-Time quantitative Polymerase Chain Reaction (RT-qPCR) was used to detect the expression levels of microRNA-378 in 96 pairs of OSCC tissues and paracancerous tissues. The relationship between microRNA-378 expression and pathological parameters and prognosis of OSCC patients was analyzed. The expression level of microRNA-378 in OSCC cells was detected by RT-qPCR as well. Also, microRNA-378 knockdown expression model was constructed using small interfering RNA in OSCC cell lines CAL-27 and Tca8113. Biological functions of OSCC cells were determined using cell counting kit-8 (CCK-8), colony formation, and transwell assay. Western blot was conducted to detect the protein expression of FOXN3 in OSCC cells. RESULTS RT-qPCR results showed that the expression level of microRNA-378 in OSCC tissues is remarkably higher than that in paracancerous tissues. Compared with OSCC patients with lower expression of microRNA-378, patients with higher expression of microRNA-378 had higher incidences of lymph node metastasis and distant metastasis, as well as shorter overall survival. MicroRNA-378 knockdown significantly decreased proliferative, invasive, and metastatic abilities of OSCC cells. Western blot results showed that microRNA-378 downregulates FOXN3 expression in OSCC cells. Rescue experiments found that microRNA-378 could regulate FOXN3, thus promoting the malignant progression of OSCC. CONCLUSIONS MicroRNA-378 is highly expressed in OSCC, which is significantly associated with tumor staging, distant metastasis, and poor prognosis of OSCC. It is shown that microRNA-378 may promote malignant progression of OSCC by regulating FOXN3.
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Bai Z, Liu L, Noman MS, Zeng L, Luo M, Li Z. The influence of antibiotics on gut bacteria diversity associated with laboratory-reared Bactrocera dorsalis. BULLETIN OF ENTOMOLOGICAL RESEARCH 2019; 109:500-509. [PMID: 30394234 DOI: 10.1017/s0007485318000834] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The oriental fruit fly Bactrocera dorsalis (Hendel) is a destructive insect pest of a wide range of fruit crops. Commensal bacteria play a very important part in the development, reproduction, and fitness of their host fruit fly. Uncovering the function of gut bacteria has become a worldwide quest. Using antibiotics to remove gut bacteria is a common method to investigate gut bacteria function. In the present study, three types of antibiotics (tetracycline, ampicillin, and streptomycin), each with four different concentrations, were used to test their effect on the gut bacteria diversity of laboratory-reared B. dorsalis. Combined antibiotics can change bacteria diversity, including cultivable and uncultivable bacteria, for both male and female adult flies. Secondary bacteria became the dominant population in female and male adult flies with the decrease in normally predominant bacteria. However, in larvae, only the predominant bacteria decreased, the bacteria diversity did not change a lot, likely because of the short acting time of the antibiotics. The bacteria diversity did not differ among fruit fly treatments with antibiotics of different concentrations. This study showed the dynamic changes of gut bacterial diversity in antibiotics-treated flies, and provides a foundation for research on the function of gut bacteria of the oriental fruit fly.
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Li J, Luo M, Tang R, Sun X, Wang Y, Liu B, Cui J, Liu G, Lin S, Chen R. Vasomotor symptoms in aging Chinese women: findings from a prospective cohort study. Climacteric 2019; 23:46-52. [PMID: 31269826 DOI: 10.1080/13697137.2019.1628734] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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105
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Mai L, Luo M, Wu JJ, Yang JH, Hong LY. The combination therapy of HIF1α inhibitor LW6 and cisplatin plays an effective role on anti-tumor function in A549 cells. Neoplasma 2019; 66:776-784. [PMID: 31169018 DOI: 10.4149/neo_2018_180921n708] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 04/28/2019] [Indexed: 11/08/2022]
Abstract
Hypoxia-inducible factor 1α (HIF1α) has been demonstrated to be involved in the resistance of various human cancer cells to chemotherapies. However, the correlation between HIF1α and the sensitivity of human non-small cell lung cancer (NSCLC) cells to cisplatin has not been illuminated. The aim of the present study was to investigate the effects of HIF1α on drug resistance in NSCLC cells. A549 cells were incubated in 21% or 0.5% O2 followed by the assessment of the level of HIF1α with qRT-PCR and western blot and ROS level by DCFH-DA assays. Effects of hypoxia or HIF1α inhibitor LW6 on the proliferation and apoptosis of A549 cells were evaluated via CCK-8 and flow cytometry assays. IC50 of A549 cells to cisplatin was determined by MTT assay. The mitochondrial membrane potential (MMP) was measured via JC-1 staining. Moreover, the expression of apoptosis related protein (Bcl-2, Bax) and drug resistance related proteins (MDR1, MRP1) were measured by western blotting. Exposure of A549 cells to 1% O2 significantly up-regulated HIF1α expression, maintained cell viability to cisplatin but decreased the ROS level, which promoted chemoresistance to cisplatin. LW6-treated A549 cells showed an increase in ROS level that blocked the hypoxia induced resistance to cisplatin and in addition, decreased expression of MDR1 and MRP1 in cisplatin-treated cells. This study revealed that hypoxia-improved cisplatin chemoresistance of NSCLC cells by regulated MDR1 and MRP1 expression via HIF1α/ROS pathway is reversed by LW6, suggesting that LW6 may act as effective sensitizer in chemotherapy for NSCLC.
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Luo M, Sarwar A, Lewis T, Weinstein J, Faintuch S, Ahmed M. Abstract No. 532 Outcomes for hepatocellular carcinoma with portal vein invasion treated with resin yttrium-90 radioembolization using MIRD model dosimetry. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Lewis T, Luo M, Mehta S. 03:00 PM Abstract No. 141 ■ FEATURED ABSTRACT Interventional radiology’s Google presence: an analysis of search engine results for common conditions and treatments. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Frisken S, Luo M, Machado I, Unadkat P, Juvekar P, Bunevicius A, Toews M, Wells WM, Miga MI, Golby AJ. Preliminary Results Comparing Thin Plate Splines with Finite Element Methods for Modeling Brain Deformation during Neurosurgery using Intraoperative Ultrasound. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2019; 10951:1095120. [PMID: 31000909 PMCID: PMC6467062 DOI: 10.1117/12.2512799] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Brain shift compensation attempts to model the deformation of the brain which occurs during the surgical removal of brain tumors to enable mapping of presurgical image data into patient coordinates during surgery and thus improve the accuracy and utility of neuro-navigation. We present preliminary results from clinical tumor resections that compare two methods for modeling brain deformation, a simple thin plate spline method that interpolates displacements and a more complex finite element method (FEM) that models physical and geometric constraints of the brain and its material properties. Both methods are driven by the same set of displacements at locations surrounding the tumor. These displacements were derived from sets of corresponding matched features that were automatically detected using the SIFT-Rank algorithm. The deformation accuracy was tested using a set of manually identified landmarks. The FEM method requires significantly more preprocessing than the spline method but both methods can be used to model deformations in the operating room in reasonable time frames. Our preliminary results indicate that the FEM deformation model significantly out-performs the spline-based approach for predicting the deformation of manual landmarks. While both methods compensate for brain shift, this work suggests that models that incorporate biophysics and geometric constraints may be more accurate.
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Luo J, Luo M, Li J, Yu J, Yang H, Yi X, Chen Y, Wei H. Rapid direct drug susceptibility testing of Mycobacterium tuberculosis based on culture droplet digital polymerase chain reaction. Int J Tuberc Lung Dis 2019; 23:219-225. [DOI: 10.5588/ijtld.18.0182] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Krok-Schoen JL, Archdeacon Price A, Luo M, Kelly OJ, Taylor CA. Low Dietary Protein Intakes and Associated Dietary Patterns and Functional Limitations in an Aging Population: A NHANES analysis. J Nutr Health Aging 2019; 23:338-347. [PMID: 30932132 PMCID: PMC6507527 DOI: 10.1007/s12603-019-1174-1] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 11/15/2018] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To investigate protein intakes across demographic characteristics in relation to dietary patterns and functional outcomes in older adults. DESIGN Observational and cross-sectional study. SETTING Non-institutionalized participants from the 2005-2014 National Health and Nutrition Examination Survey. PARTICIPANTS Data from 11,680 adults were categorized into 51-60 years (n= 4,016), 61-70 years (n=3,854), and 71 years and older (n=3,810) for analysis. MEASUREMENTS Adults were stratified by meeting or not meeting the protein recommendation (0.8 g/kg/d) to compare demographics, diet quality with Healthy Eating Index-2015, functional limitations, and other dietary intakes. Dietary recalls were collected using the multiple pass method. Data analyses were weighted to create a nationally-representative sample. RESULTS Dietary protein intakes were significantly lower in older age groups, with up to 46% of the oldest adults not meeting the protein intake recommendation. Participants consuming protein below the recommended intake level had significantly poorer diet quality across all age groups (P<0.01), however, overall diet quality was better in older adults. Those not meeting the protein recommendation were more likely to have intakes of other nutrients below recommended levels. Those below the protein recommendation had significantly more functional limitations across all age groups, while grip strength was significantly lower in those over 70 years old. CONCLUSION Lower protein intakes, and lower diet quality and physical functioning are related in an aging population. Meeting the protein recommendation was linked to better overall diet quality and may be protective of lean mass; therefore, evaluation of individual characteristics which may affect protein intakes is crucial in supporting older adults to meet their protein needs.
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Meng D, Yu Q, Feng L, Luo M, Shao S, Huang S, Wang G, Jing X, Tong Z, Zhao X, Liu R. Citron kinase (CIT-K) promotes aggressiveness and tumorigenesis of breast cancer cells in vitro and in vivo: preliminary study of the underlying mechanism. Clin Transl Oncol 2018; 21:910-923. [DOI: 10.1007/s12094-018-02003-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 12/03/2018] [Indexed: 12/11/2022]
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112
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Yang H, Ma Y, Luo M, Zhao K, Zhang Y, Zhu G, Sun X, Luo F, Wang L, Shu C, Zhou Z. Identification of gross deletions in FBN1 gene by MLPA. Hum Genomics 2018; 12:46. [PMID: 30286810 PMCID: PMC6172713 DOI: 10.1186/s40246-018-0178-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 09/18/2018] [Indexed: 12/13/2022] Open
Abstract
Background Marfan syndrome (MFS) is an autosomal dominant connective tissue disorder caused by mutations in the FBN1 gene. Approximately 90% of classic MFS patients have a FBN1 mutation that can be identified by single-gene sequencing or gene-panel sequencing targeting FBN1. However, a small proportion of MFS patients carry a large genomic deletion in FBN1, which cannot be detected by routine sequencing. Here, we performed an MLPA (multiplex ligation-dependent probe amplification) test to detect large deletions and/or duplications in FBN1 and TGFBR2 in 115 unrelated Chinese patients with suspected MFS or early-onset aneurysm/dissection. Results Five novel large deletions encompassing a single exon or multiple exons in the FBN1 gene were characterized in five unrelated patients, of which four were proven by Sanger sequencing, and the breakpoints were identified. Three of them met the revised Ghent criteria when genetic results were not available, and the other two patients were highly suspected and diagnosed with MFS until the FBN1 deletions were identified. Conclusions Our finding expands the mutation spectrum of large FBN1 deletions and emphasizes the importance of screening for large FBN1 deletions in clinical genetic testing, especially for those with classic Marfan phenotype. Electronic supplementary material The online version of this article (10.1186/s40246-018-0178-y) contains supplementary material, which is available to authorized users.
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Fanelli S, Kelly O, Luo M, Krok-Schoen J, Taylor C. Differences in Micronutrient Intakes by Levels of Glycemic Control in US Adults. J Acad Nutr Diet 2018. [DOI: 10.1016/j.jand.2018.08.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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114
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Fanelli S, Kelly O, Luo M, Krok-Schoen J, Taylor C. Prevalence of Physical Function Limitations by Protein Intake Levels in US Older Adults. J Acad Nutr Diet 2018. [DOI: 10.1016/j.jand.2018.08.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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115
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Luo M, Pereira S, Baggs G, Nelson J, Deutz N. Association between baseline levels of amino acids and their metabolites and clinical outcomes in malnourished, hospitalized older patients. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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116
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Nelson J, Luo M, Baggs G, Choe Y, Matarese L, Deutz N. Relationship between admission nutritional status and clinical outcomes in malnourished older adults. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.2011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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117
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Schiffer JM, Luo M, Dommer AC, Thoron G, Pendergraft M, Santander MV, Lucero D, Pecora de Barros E, Prather KA, Grassian VH, Amaro RE. Impacts of Lipase Enzyme on the Surface Properties of Marine Aerosols. J Phys Chem Lett 2018; 9:3839-3849. [PMID: 29916254 DOI: 10.1021/acs.jpclett.8b01363] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Triacylglycerol lipases have recently been shown to be transferred from the ocean to the atmosphere in atmospheric sea spray aerosol (SSA). Lipases have the potential to alter the composition of SSA; however, the structure and properties of enzymes in the high salt, high ionic strength, and low pH conditions found in SSA have never been explored. Here, we study the dynamics of Burkholderia cepacia triacylglycerol lipase (BCL) at SSA model surfaces comprised of palmitic acid and dipalmitoylphosphatidic acid (DPPA), two commonly found lipids at SSA surfaces. Surface adsorption Langmuir isotherm experiments and all-atom explicit solvent molecular dynamics simulations together illuminate how and why BCL expands the ordering of lipids at palmitic acid surfaces the most at pH < 4 and the least in DPPA surfaces at pH 6. Taken together, these results represent a first glimpse into the complex interplay between lipid surface structure and protein dynamics within enzyme-containing aerosols.
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Sun X, Luo M, Ma M, Tang R, Wang Y, Liu G, Lin S, Chen R. Ovarian aging: an ongoing prospective community-based cohort study in middle-aged Chinese women. Climacteric 2018; 21:404-410. [PMID: 29741107 DOI: 10.1080/13697137.2018.1458833] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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119
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Luo M, Guo CC, Qi L, Zhang JC. Synthesis of Cu(II) and Mn(III) Complexes Involving Derivatives of Pyridine. RUSS J COORD CHEM+ 2018. [DOI: 10.1134/s1070328418050056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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120
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Wei A, Liao L, Xiang L, Yan J, Yang W, Nai G, Luo M, Deng D, Lin F. Congenital dysfibrinogenaemia assessed by whole blood thromboelastography. Int J Lab Hematol 2018; 40:459-465. [PMID: 29708302 DOI: 10.1111/ijlh.12827] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 02/27/2018] [Indexed: 12/17/2022]
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Luo YL, Wu JB, Luo M. [Impact of platelet mRNA/miRNA transfer on vascular cell function]. ZHONGHUA XIN XUE GUAN BING ZA ZHI 2018; 46:161-164. [PMID: 29495242 DOI: 10.3760/cma.j.issn.0253-3758.2018.02.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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122
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Luo M, Shang L, Brooks M, Jiagge E, Zhu Y, Conley S, Fath MA, Harouaka R, Merajver SD, Spitz DR, Wicha MS. Abstract P1-02-09: Targeting breast cancer stem cell state equilibrium through modulation of redox signaling. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p1-02-09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Breast cancer stem cells (BCSCs) maintain the plasticity to transition between quiescent mesenchymal- (M) and proliferative epithelial-like (E) states, but how this plasticity is regulated under metabolic/oxidative stress is poorly understood. Here, we show that M- and E-BCSCs exhibit markedly different sensitivities to the inhibitors of glycolysis and redox metabolism. Metabolic/Oxidative stress generated by 2DG/H2O2 or hypoxia promotes ROSlo M-BCSCs transition to their ROShi E-state. This transition is reversed by the antioxidant N-acetyl cysteine and facilitated by the activation of the AMPK-HIF1α axis. Moreover, E-BCSCs exhibit robust expression of NRF2/NFE2L2 and a wide variety of NRF2 downstream antioxidant responsive genes including the family of drug transporters and detoxification enzymes, NADPH production as well as the thioredoxin (TXN) and glutathione (GSH) antioxidant pathways. Suppression of NRF2 activity by a small-molecular inhibitor Trigonelline or shNRF2 mediated knockdown significantly decreased ALDH+ E- but not CD24-CD44+ M-BCSCs. This specific vulnerability of E-BCSCs to the inhibition of NRF2-mediated antioxidant defenses was also observed following inhibition of the downstream TXN and GSH antioxidant pathways, which promotes ROS-mediated differentiation and subsequent apoptosis of E-BCSCs. Co-inhibition of glycolysis and TXN/GSH pathways synergistically suppressed tumor growth and tumor initiating potential in two patient-derived xenograft models of triple negative breast cancer by eliminating both M- and E-BCSCs. Together, our studies reveal novel cellular and molecular mechanisms demonstrating how modulation of redox signaling regulates the equilibrium of two distinct BCSC states. These studies define the metabolic vulnerabilities of M- and E-BCSCs, and also provide a novel therapeutic approach to collectively target these distinct CSC states. As the CSC state equilibrium may be similarly regulated across a spectrum of tumors with diverse oncogenic drivers, this approach may have broad therapeutic applicability.
Citation Format: Luo M, Shang L, Brooks M, Jiagge E, Zhu Y, Conley S, Fath MA, Harouaka R, Merajver SD, Spitz DR, Wicha MS. Targeting breast cancer stem cell state equilibrium through modulation of redox signaling [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P1-02-09.
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Maffei V, Siggins R, Luo M, Molina P, Taylor C, Welsh D. Alcohol intake and T cell aging in HIV+ humans are associated with gut bacterial burden. Alcohol 2018. [DOI: 10.1016/j.alcohol.2017.11.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Luo M, Ji Y, Luo Y, Li R, Fay WP, Wu J. Plasminogen activator inhibitor-1 regulates the vascular expression of vitronectin. J Thromb Haemost 2017; 15:2451-2460. [PMID: 29028290 PMCID: PMC5716874 DOI: 10.1111/jth.13869] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Indexed: 11/30/2022]
Abstract
Essentials Vitronectin (VN) is produced by smooth muscle cells (SMCs) and promotes neointima formation. We studied the regulation of vascular VN expression by plasminogen activator inhibitor-1 (PAI-1). PAI-1 stimulates VN gene expression in SMCs by binding LDL receptor-related protein 1. Stimulation of VN gene expression may be a mechanism by which PAI-1 controls vascular remodeling. SUMMARY Background Increased expression of vitronectin (VN) by smooth muscle cells (SMCs) promotes neointima formation after vascular injury, and may contribute to chronic vascular diseases, such as atherosclerosis. However, the molecular regulation of vascular VN expression is poorly defined. Given the overlapping expression profiles and functions of VN and plasminogen activator inhibitor (PAI)-1, we hypothesized that PAI-1 regulates vascular VN expression. Objectives To determine whether PAI-1 regulates VN expression in SMCs and in vivo. Methods The effects of genetic alterations in PAI-1 expression, pharmacologic PAI-1 inhibition and recombinant PAI-1 on SMC VN expression were studied, and vascular VN expression in wild-type (WT) and PAI-1-deficient mice was assessed. Results VN expression was significantly lower in PAI-1-deficient SMCs and significantly increased in PAI-1-overexpressing SMCs. PAI-1 small interfering RNA and pharmacologic PAI-1 inhibition significantly decreased SMC VN expression. Recombinant PAI-1 stimulated VN expression by binding LDL receptor-related protein-1 (LRP1), but another LRP1 ligand, α2 -macroglobulin, did not. As compared with WT controls, carotid artery VN expression was significantly lower in PAI-1-deficient mice and significantly higher in PAI-1-transgenic mice. In a vein graft (VG) model of intimal hyperplasia, VN expression was significantly attenuated in PAI-1-deficient VGs as compared with WT controls. The plasma VN concentration was significantly decreased in PAI-1-deficient mice versus WT controls at 4 weeks, but not at 5 days or 8 weeks, after surgery. Conclusions PAI-1 stimulates SMC VN expression by binding LRP1, and controls vascular VN expression in vivo. Autocrine regulation of vascular VN expression by PAI-1 may play important roles in vascular homeostasis and pathologic vascular remodeling.
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MESH Headings
- Animals
- Cells, Cultured
- Gene Expression Regulation
- Humans
- Low Density Lipoprotein Receptor-Related Protein-1
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/cytology
- Myocytes, Smooth Muscle/metabolism
- Neointima/etiology
- Neointima/genetics
- Neointima/metabolism
- RNA, Small Interfering/genetics
- Receptors, LDL/metabolism
- Recombinant Proteins/genetics
- Recombinant Proteins/metabolism
- Serpin E2/deficiency
- Serpin E2/genetics
- Serpin E2/metabolism
- Tumor Suppressor Proteins/metabolism
- Vascular Remodeling
- Vitronectin/deficiency
- Vitronectin/genetics
- Vitronectin/metabolism
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Dave H, Luo M, Blaney J, Shpall E, Bollard C, Hanley P. Rapid manufacture of multi-virus specific T cells targeting BKV, adenovirus, CMV and EBV for recipients of umbilical cord blood transplant. Cytotherapy 2017. [DOI: 10.1016/j.jcyt.2017.02.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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