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Wang H, Yao L, Chen J, Ding Z, Ou X, Zhang C, Zhao J, Han Y. Antifungal Peptide P852 Effectively Controls Fusarium oxysporum, a Wilt-Causing Fungus, by Affecting the Glucose Metabolism and Amino Acid Metabolism as well as Damaging Mitochondrial Function. J Agric Food Chem 2023; 71:19638-19651. [PMID: 38015891 DOI: 10.1021/acs.jafc.3c07953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Fusarium oxysporum causes wilt disease, which causes huge economic losses to a wide range of agricultural cash crops. Antifungal peptide P852 is an effective biocide. However, the mechanism of direct inhibition of pathogenic fungus needs to be explored. The proteomics and transcriptomics results showed that P852 mainly affected intracellular pathways such as glucose metabolism, amino acid metabolism, and oxidoreductase activity in F. oxysporum. P852 disrupts the intracellular oxidative equilibrium in F. oxysporum, and transmission electron microscopy observed mitochondrial swelling, disruption of membrane structure, and leakage of contents. Decreased mitochondrial membrane potential, mitochondrial cytochrome c leakage, and reduced ATP production were also detected. These results suggest that P852 is able to simultaneously inhibit intracellular metabolism and disrupt the mitochondrial function of F. oxysporum, exerting its inhibitory effects in multiple pathways together. The present study provides some insights into the multitargeted mechanism of fungus inhibition of antifungal lipopeptide substances produced by Bacillus spp.
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Affiliation(s)
- Hongji Wang
- College of Animal Science and Technology, Southwest University, Chongqing 402460, China
| | - Lan Yao
- College of Animal Science and Technology, Southwest University, Chongqing 402460, China
| | - Jie Chen
- College of Animal Science and Technology, Southwest University, Chongqing 402460, China
| | - Zeran Ding
- College of Animal Science and Technology, Southwest University, Chongqing 402460, China
| | - Xuan Ou
- College of Animal Science and Technology, Southwest University, Chongqing 402460, China
| | - Chaowen Zhang
- College of Animal Science and Technology, Southwest University, Chongqing 402460, China
| | - Jianjun Zhao
- College of Animal Science and Technology, Southwest University, Chongqing 402460, China
| | - Yuzhu Han
- College of Animal Science and Technology, Southwest University, Chongqing 402460, China
- Immunology Research Center, Institute of Medicine, Southwest University, Chongqing 402460, China
- Chongqing Key Laboratory of Herbivore Science, Chongqing 402460, China
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Ou X, He X, Wang Y, Hu C. Induction Chemotherapy and Toripalimab for Larynx Preservation in Resectable Locally Advanced Laryngeal/Hypopharyngeal Carcinoma: Preliminary Results of INSIGHT Study. Int J Radiat Oncol Biol Phys 2023; 117:S99. [PMID: 37784619 DOI: 10.1016/j.ijrobp.2023.06.2296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Previous studies have demonstrated excellent pathological response of induction PD-1 inhibitor with chemotherapy for locally advanced head and neck cancer. To our knowledge, there is scarce evidence on induction chemotherapy (ICT) and PD-1 inhibitor in organ preservation for patients (pts) with laryngeal/hypopharyngeal carcinoma. Hence, the aim of this study is to evaluate the efficacy and toxicities of ICT and PD-1inhibitor (Toripalimab) followed by radiotherapy or surgery, for pts with resectable locally advanced laryngeal/hypopharyngeal carcinoma. MATERIALS/METHODS This isa single-arm phase II study. Pts with histopathologic confirmed, resectable locally advanced laryngeal/hypopharyngeal squamous cell carcinoma and ECOG PS 0-1 were eligible. Three cycles of ICT (paclitaxel 175 mg/m d1, cisplatin 25 mg/m d1-3) combined with PD-1 inhibitor (Toripalimab 240 mg d0) were given. Response assessment (RECIST 1.1) was performed post-ICT. Patients with complete response (CR)/partial response (PR) of primary tumor received concurrent chemoradiation, followed by maintenance therapy of Toripalimab for eight cycles. Otherwise, patients were referred to surgery, followed by adjuvant radiation (RT)/chemoradiation (CRT), and then maintenance therapy of Toripalimab. The primary endpoint is larynx-preservation (LP) rate at 3 months post-RT. Forty-two patients were planned. Based on a two-stage Fleming design (one-sided α:10%, power: 80%), if at least 22 patients attained LP of the first 27 patients in stage I or at least thirty-two pts attained LP of the 42 patients at the end of stage II, the null hypothesis would be rejected. The cohort would enroll 15 more pts in stage II if 19-21 pts in stage I observed LP, and the study would be terminated if the number of pts with LP were less than 18 in stage I. RESULTS A total of 27 pts were enrolled. By the cut-off date Feb 8, 2023, all reached at least 3 months of follow-up post-RT. Median age was 63 (53-74) years with 92.6% male. Hypopharyngeal cancer accounted for 66.7%. There were 74.1% who were T3 to T4, and 77.7% were N2 to N3. Six cases had primary invasion of esophagus and five pts underwent pretreatment tracheostomy. ORR of ICT was 85.2%. Afterward, 21 pts were treated with concurrent CRT, while 6 pts received surgery of primary tumor. At 3 months post-RT, 23 pts attained organ preservation and the LP rate was 85.2%. With a median follow-up of 13.5 months, 1-year OS rate, PFS rate and LP survival rate was 83.1%, 79.5% and 79.4%, respectively. During ICT, 22.2% of pts experienced grade 3-4 treatment-related AEs (TRAEs). The most common grade 3-4 TRAEs were nausea and neutrophil count decreased. CONCLUSION The primary endpoint LP rate was met. In this cohort of extensive locally advanced laryngeal/hypopharyngeal carcinoma, ICT and Toripalimab followed by radiotherapy or surgery resulted in satisfactory short-term LP rate and encouraging survival.
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Affiliation(s)
- X Ou
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - X He
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Y Wang
- Department of Head and Neck Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - C Hu
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China
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Dudley JA, Nagaraj UD, Merhar S, Mangano FT, Kline-Fath BM, Ou X, Acheson A, Yuan W. DTI of Opioid-Exposed Fetuses Using ComBat Harmonization: A Bi-Institutional Study. AJNR Am J Neuroradiol 2023; 44:1084-1089. [PMID: 37562830 PMCID: PMC10494946 DOI: 10.3174/ajnr.a7951] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 06/25/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND AND PURPOSE The underlying mechanisms leading to altered cognitive, behavioral, and vision outcomes in children with prenatal opioid exposure are yet to be fully understood. Some studies suggest WM alterations in infants and children with prenatal opioid exposure; however, the time course of WM changes is unknown. We aimed to evaluate differences in diffusion tensor imaging MRI parameters in the brain between opioid exposed fetuses and normal controls. MATERIALS AND METHODS This is a pilot, prospective cohort study in which subjects in the third trimester of pregnancy underwent fetal DTI of the brain with 20 noncolinear diffusion directions and a b-value of 500 s/mm2 at 2.5-mm isotropic resolution. RESULTS The study included a total of 26 fetuses, 11 opioid-exposed (mean gestational age, 32.61 [SD, 2.35] weeks) and 15 unexposed controls (mean gestational age, 31.77 [SD, 1.68] weeks). After we adjusted for gestational age, fractional anisotropy values were significantly higher in opioid-exposed fetuses relative to controls in 8 WM tracts: the bilateral lemniscus (left: P = .017; right: P = .020), middle cerebellar peduncle (P = .027), left inferior cerebellar peduncle (P = .026), right sagittal stratum (P = .040), right fornix stria terminalis (P = .022), right inferior fronto-occipital fasciculus (P = .011), and the right uncinate fasciculus (P = .033). Significant alteration was also identified in other DTI indices involving a series of brain regions. CONCLUSIONS Our data demonstrate initial evidence of cerebral WM microstructural differences between opioid-exposed fetuses and unexposed controls. Further studies in larger patient populations will be needed to fully understand these findings.
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Affiliation(s)
- J A Dudley
- From the Department of Radiology and Medical Imaging (J.A.D., U.D.N., B.M.K.-F., W.Y.), Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
- University of Cincinnati College of Medicine (J.A.D., U.D.N., S.M., F.T.M., B.M.K.-F., W.Y.), Cincinnati, Ohio
| | - U D Nagaraj
- From the Department of Radiology and Medical Imaging (J.A.D., U.D.N., B.M.K.-F., W.Y.), Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
- University of Cincinnati College of Medicine (J.A.D., U.D.N., S.M., F.T.M., B.M.K.-F., W.Y.), Cincinnati, Ohio
| | - S Merhar
- University of Cincinnati College of Medicine (J.A.D., U.D.N., S.M., F.T.M., B.M.K.-F., W.Y.), Cincinnati, Ohio
- Perinatal Institute, Division of Neonatology (S.M.), Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - F T Mangano
- University of Cincinnati College of Medicine (J.A.D., U.D.N., S.M., F.T.M., B.M.K.-F., W.Y.), Cincinnati, Ohio
- Department of Neurosurgery (F.T.M.), Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - B M Kline-Fath
- From the Department of Radiology and Medical Imaging (J.A.D., U.D.N., B.M.K.-F., W.Y.), Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
- University of Cincinnati College of Medicine (J.A.D., U.D.N., S.M., F.T.M., B.M.K.-F., W.Y.), Cincinnati, Ohio
| | - X Ou
- Departments of Radiology (X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Departments of Pediatrics (X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - A Acheson
- Department of Psychiatry (A.A.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - W Yuan
- From the Department of Radiology and Medical Imaging (J.A.D., U.D.N., B.M.K.-F., W.Y.), Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
- University of Cincinnati College of Medicine (J.A.D., U.D.N., S.M., F.T.M., B.M.K.-F., W.Y.), Cincinnati, Ohio
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Wenbin Y, Liu T, He M, Yi J, Tang L, Ou X, Hu C. 226MO Is induction chemotherapy beneficial in locally recurrent nasopharyngeal carcinoma before re-irradiation? A multicenter retrospective analysis. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
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Hammel P, Golan T, Reni M, Van Cutsem E, Macarulla Mercade T, Hall M, Park J, Hochhauser D, Arnold D, Oh DY, Reinacher-Schick A, Tortora G, Algül H, O'Reilly E, Sharan K, Ou X, Cui K, Locker G, Kindler H. 1298P Extended overall survival results from the POLO study of active maintenance olaparib in patients with metastatic pancreatic cancer and a germline BRCA mutation. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Lightowler M, Li S, Ou X, Hofer G, Cho J, Zou X, Lu M, Xu H. Navigating crystal forms in pharmaceutical compounds by 3DED/microED. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322091069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Liu C, Zheng J, Ou X, Han Y. Anti-cancer Substances and Safety of Lactic Acid Bacteria in Clinical Treatment. Front Microbiol 2021; 12:722052. [PMID: 34721321 PMCID: PMC8548880 DOI: 10.3389/fmicb.2021.722052] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 09/08/2021] [Indexed: 01/06/2023] Open
Abstract
Lactic acid bacteria (LAB) are a kind of Gram-positive bacteria which can colonize in the biological gastrointestinal tract and play a variety of probiotic roles. LAB have a wide range of applications in industry, animal husbandry, planting, food safety, and medical science fields. Previous studies on LAB have typically concentrated on their effects on improving the digestion and absorption of the gastrointestinal tract, regulating the balance of the microflora, and inhibiting the production and accumulation of toxic substances. The resistance of LAB to cancer is a topic of growing interest and relevance. This paper provided a summary of bio-active substances of LAB when they act against cancer, as well as the safety of LAB in clinical cancer treatment. Moreover, this paper further discussed several possible directions for future research and the potential application of LAB as anti-cancer therapy.
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Affiliation(s)
- Chaoran Liu
- College of Animal Science and Technology, Southwest University, Chongqing, China
| | - Jiaqi Zheng
- College of Animal Science and Technology, Southwest University, Chongqing, China
| | - Xuan Ou
- College of Animal Science and Technology, Southwest University, Chongqing, China
| | - Yuzhu Han
- College of Animal Science and Technology, Southwest University, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
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Na X, Phelan NE, Tadros MR, Wu Z, Andres A, Badger TM, Glasier CM, Ramakrishnaiah RR, Rowell AC, Wang L, Li G, Williams DK, Ou X. Maternal Obesity during Pregnancy is Associated with Lower Cortical Thickness in the Neonate Brain. AJNR Am J Neuroradiol 2021; 42:2238-2244. [PMID: 34620592 DOI: 10.3174/ajnr.a7316] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/09/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Recent studies have suggested that maternal obesity during pregnancy is associated with differences in neurodevelopmental outcomes in children. In this study, we aimed to investigate the relationships between maternal obesity during pregnancy and neonatal brain cortical development. MATERIALS AND METHODS Forty-four healthy women (28 normal-weight, 16 obese) were prospectively recruited at <10 weeks' gestation, and their healthy full-term neonates (23 boys, 21 girls) underwent brain MR imaging. All pregnant women had their body composition (fat mass percentage) measured at ∼12 weeks of pregnancy. All neonates were scanned at ∼2 weeks of age during natural sleep without sedation, and their 3D T1-weighted images were postprocessed by the new iBEAT2.0 software. Brain MR imaging segmentation and cortical surface reconstruction and parcellation were completed using age-appropriate templates. Mean cortical thickness for 34 regions in each brain hemisphere defined by the UNC Neonatal Cortical Surface Atlas was measured, compared between groups, and correlated with maternal body fat mass percentage, controlled for neonate sex and race, postmenstrual age at MR imaging, maternal age at pregnancy, and the maternal intelligence quotient and education. RESULTS Neonates born to obese mothers showed significantly lower (P ≤ .05, false discovery rate-corrected) cortical thickness in the left pars opercularis gyrus, left pars triangularis gyrus, and left rostral middle frontal gyrus. Mean cortical thickness in these frontal lobe regions negatively correlated (R = -0.34, P = .04; R = -0.50, P = .001; and R = -0.42, P = .01; respectively) with the maternal body fat mass percentage measured at early pregnancy. CONCLUSIONS Maternal obesity during pregnancy is associated with lower neonate brain cortical thickness in several frontal lobe regions important for language and executive functions.
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Affiliation(s)
- X Na
- From the Department of Radiology (X.N., C.M.G., R.R.R., A.C.R., X.O.).,Arkansas Children's Nutrition Center (X.N., A.A., T.M.B., X.O.), Little Rock, Arkansas.,Arkansas Children's Research Institute (X.N., A.A., T.M.B., X.O.), Little Rock, Arkansas
| | | | | | - Z Wu
- Department of Radiology (Z.W., L.W., G.L.), University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - A Andres
- Departments of Pediatrics (A.A., T.M.B., C.M.G., R.R.R., X.O.).,Arkansas Children's Nutrition Center (X.N., A.A., T.M.B., X.O.), Little Rock, Arkansas.,Arkansas Children's Research Institute (X.N., A.A., T.M.B., X.O.), Little Rock, Arkansas
| | - T M Badger
- Departments of Pediatrics (A.A., T.M.B., C.M.G., R.R.R., X.O.).,Arkansas Children's Nutrition Center (X.N., A.A., T.M.B., X.O.), Little Rock, Arkansas.,Arkansas Children's Research Institute (X.N., A.A., T.M.B., X.O.), Little Rock, Arkansas
| | - C M Glasier
- From the Department of Radiology (X.N., C.M.G., R.R.R., A.C.R., X.O.).,Departments of Pediatrics (A.A., T.M.B., C.M.G., R.R.R., X.O.)
| | - R R Ramakrishnaiah
- From the Department of Radiology (X.N., C.M.G., R.R.R., A.C.R., X.O.).,Departments of Pediatrics (A.A., T.M.B., C.M.G., R.R.R., X.O.)
| | - A C Rowell
- From the Department of Radiology (X.N., C.M.G., R.R.R., A.C.R., X.O.)
| | - L Wang
- Department of Radiology (Z.W., L.W., G.L.), University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - G Li
- Department of Radiology (Z.W., L.W., G.L.), University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - D K Williams
- Biostatistics (D.K.W.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - X Ou
- From the Department of Radiology (X.N., C.M.G., R.R.R., A.C.R., X.O.) .,Departments of Pediatrics (A.A., T.M.B., C.M.G., R.R.R., X.O.).,Arkansas Children's Nutrition Center (X.N., A.A., T.M.B., X.O.), Little Rock, Arkansas.,Arkansas Children's Research Institute (X.N., A.A., T.M.B., X.O.), Little Rock, Arkansas
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Han J, Sequist L, Ahn M, Cho B, Yu H, Kim S, Yang J, Lee J, Su W, Kowalski D, Orlov S, Cantarini M, Ren S, Frewer P, Ou X, Janne P. FP14.03 Osimertinib + Savolitinib in pts with EGFRm MET-Amplified/Overexpressed NSCLC: Phase Ib TATTON Parts B and D Final Analysis. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ying RS, Le T, Cai WP, Li YR, Luo CB, Cao Y, Wen CY, Wang SG, Ou X, Chen WS, Chen SZ, Guo PL, Chen M, Guo Y, Tang XP, Li LH. Clinical epidemiology and outcome of HIV-associated talaromycosis in Guangdong, China, during 2011-2017. HIV Med 2020; 21:729-738. [PMID: 33369035 PMCID: PMC7978497 DOI: 10.1111/hiv.13024] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2020] [Indexed: 01/25/2023]
Abstract
OBJECTIVES Talaromycosis is an invasive mycosis endemic to Southeast Asia. This study aimed to investigate the epidemiology, clinical features and prognostic factors of HIV-associated talaromycosis in Guangdong, China. METHODS We retrospectively evaluated HIV patients hospitalized with histopathology- or culture-confirmed talaromycosis between 2011 and 2017. Factors associated with poor prognosis were identified using logistic regression. RESULTS Overall, 1079 patients with HIV-associated talaromycosis were evaluated. Both the number and prevalence of talaromycosis among HIV admissions increased from 125 and 15.7% in 2011 to 253 and 18.8% in 2017, respectively, reflecting the increase in HIV admissions. Annual admissions peaked during the rainy season between March and August. Common clinical manifestations included fever (85.6%), peripheral lymphadenopathy (72.3%), respiratory symptoms (60.8%), weight loss (49.8%), skin lesions (44.5%) and gastrointestinal symptoms (44.3%). Common laboratory abnormalities were hypoalbuminaemia (98.6%), anaemia (95.6%), elevated aspartate aminotransferase level (AST) (76.9%), elevated alkaline phosphatase level (55.8%) and thrombocytopenia (53.7%). The median CD4 count was 9 cells/μL. Talaromyces marneffei was isolated from blood and bone marrow cultures of 66.6% and 74.5% of patients, respectively. The rate increased to 86.6% when both cultures were performed concurrently. At discharge, 14% of patients showed worsening conditions or died. Leucocytosis, thrombocytopenia, elevated AST, total bilirubin, creatinine and azole monotherapy independently predicted poor prognosis. CONCLUSIONS The incidence of HIV-associated talaromycosis has increased in Guangdong with the high HIV burden in China. Skin lesions were seen in less than half of patients. Induction therapy with azole alone is associated with higher mortality. Findings from this study should help to improve treatment of the disease.
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Affiliation(s)
- R S Ying
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - T Le
- Division of Infectious Diseases and International Health, Duke University School of Medicine, Durham, NC, USA
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - W P Cai
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Y R Li
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - C B Luo
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Y Cao
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - C Y Wen
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - S G Wang
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - X Ou
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - W S Chen
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - S Z Chen
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - P L Guo
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - M Chen
- Hospital-Acquired Infection Control Department, Bijie Third People's Hospital, Bijie, China
| | - Y Guo
- Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - X P Tang
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - L H Li
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
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Gan Y, Du Q, Liu W, Li J, Jiang X, Li X, Ou X, Yue H, Zhu H, Zhong Q, Luo D, Liang Q, Xie Y, Zhang Q, Li G, Shang Y. Value Of Radiotherapy After Minimally Invasive Surgery In Patients With Stage IA1-IIA1 Cervical Cancer. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ou X, Shen C, He X, Hu C. Germline Mutation Landscape of DNA Damage Repair Genes in Nasopharyngeal Carcinoma. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.2168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Graham RM, Jiang L, McCorkle G, Bellando BJ, Sorensen ST, Glasier CM, Ramakrishnaiah RH, Rowell AC, Coker JL, Ou X. Maternal Anxiety and Depression during Late Pregnancy and Newborn Brain White Matter Development. AJNR Am J Neuroradiol 2020; 41:1908-1915. [PMID: 32912873 DOI: 10.3174/ajnr.a6759] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 07/06/2020] [Indexed: 12/31/2022]
Abstract
BACKGROUND AND PURPOSE Anxiety and depression during pregnancy have been associated with an increased risk of adverse neurodevelopmental outcomes in offspring. We aimed to study the in utero effects of maternal anxiety and depression on early brain development. MATERIALS AND METHODS Pregnant women were recruited at ∼36 weeks of gestation for this prospective study. They were assessed for anxiety symptoms by the State-Trait Anxiety Inventory and for depression symptoms by the Beck Depression Inventory, 2nd Edition. After delivery, infant underwent an MR imaging examination of the brain without sedation, including DTI, for evaluation of white matter (WM) development. Infant fractional anisotropy values, a putative marker of WM integrity, were correlated with the mothers' State-Trait Anxiety Inventory and Beck Depression Inventory scores by using both tract-based spatial statistics and ROI methods. RESULTS Thirty-four infants were included in this study. Both maternal State-Anxiety and Trait-Anxiety scores negatively correlated (P < .05, corrected) with fractional anisotropy values in widespread brain WM regions; Beck Depression Inventory scores also negatively correlated (P < .05) with fractional anisotropy values in one cluster in the brain. Further ROI analyses confirmed significant negative correlations between average fractional anisotropy values in ROIs including left and right prefrontal WM, left and right middle frontal gyrus WM, and the fornix, and State-Anxiety (R values, -0.47 to -0.67; P values, .008 to <.001), Trait-Anxiety (R, -0.37 to -0.59; P, .04 to <.001), and Beck Depression Inventory (R values, -0.36 to -0.55; P, .05 to .002) scores. CONCLUSIONS Higher maternal anxiety and depression symptom scores during late pregnancy were associated with lower estimated infant brain WM development, which indicated in utero influences of maternal mental health during pregnancy on the developing brain.
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Affiliation(s)
- R M Graham
- From the Departments of Radiology (R.M.G., L.J., C.M.G., R.H.R., A.C.R., X.O.)
| | - L Jiang
- From the Departments of Radiology (R.M.G., L.J., C.M.G., R.H.R., A.C.R., X.O.)
| | - G McCorkle
- Arkansas Children's Nutrition Center (G.M., X.O.), Little Rock, Arkansas
| | - B J Bellando
- Pediatrics (B.J.B., S.T.S., C.M.G., R.H.R., X.O.)
| | - S T Sorensen
- Pediatrics (B.J.B., S.T.S., C.M.G., R.H.R., X.O.)
| | - C M Glasier
- From the Departments of Radiology (R.M.G., L.J., C.M.G., R.H.R., A.C.R., X.O.).,Pediatrics (B.J.B., S.T.S., C.M.G., R.H.R., X.O.)
| | - R H Ramakrishnaiah
- From the Departments of Radiology (R.M.G., L.J., C.M.G., R.H.R., A.C.R., X.O.).,Pediatrics (B.J.B., S.T.S., C.M.G., R.H.R., X.O.)
| | - A C Rowell
- From the Departments of Radiology (R.M.G., L.J., C.M.G., R.H.R., A.C.R., X.O.)
| | - J L Coker
- Psychiatry, and Obstetrics and Gynecology (J.L.C.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - X Ou
- From the Departments of Radiology (R.M.G., L.J., C.M.G., R.H.R., A.C.R., X.O.) .,Pediatrics (B.J.B., S.T.S., C.M.G., R.H.R., X.O.).,Arkansas Children's Nutrition Center (G.M., X.O.), Little Rock, Arkansas.,Arkansas Children's Research Institute (X.O.), Little Rock, Arkansas
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Li T, Badger TM, Bellando BJ, Sorensen ST, Lou X, Ou X. Brain Cortical Structure and Executive Function in Children May Be Influenced by Parental Choices of Infant Diets. AJNR Am J Neuroradiol 2020; 41:1302-1308. [PMID: 32527846 DOI: 10.3174/ajnr.a6601] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 04/17/2020] [Indexed: 01/25/2023]
Abstract
BACKGROUND AND PURPOSE While it is known that breastfeeding promotes healthy brain development in children, the potential effects of formulas substantially differing in composition (ie, milk-based versus soy-based) during infancy on brain development are unclear. MATERIALS AND METHODS Seventy-one 8-year-old children who were predominantly breastfed, milk formula fed, or soy formula fed during infancy were recruited for an MR imaging examination of the brain and a Behavior Rating Inventory of Executive Function assessment (completed via a questionnaire to the parents). Brain cortical features measured from MR imaging such as cortical thickness and surface area were extracted and compared among groups and correlated with Behavior Rating Inventory of Executive Function test scores. RESULTS Clusters in the frontal and occipital lobes showed significant differences (cluster-wise P ≤ .05, corrected for multiple comparisons) in cortical thickness or surface area among the 3 diet groups. The effects were more prominent for boys, particularly for comparison of the milk formula fed versus soy formula fed boys. Assessments of executive function and behavior showed significantly lower Behavior Rating Inventory of Executive Function test scores in soy formula fed versus milk formula fed groups, which were mostly attributed to differences in boys. There were no differences between milk formula fed and breastfed groups for either sex. Mean cortical thickness for several of the clusters in the brain showing infant diet-associated effects significantly correlated with Behavior Rating Inventory of Executive Function scores. CONCLUSIONS Choices of infant diets (ie, breastfed, milk formula fed, soy formula fed) may have long-term and sex-specific effects on the cortical development and executive function and behavior of children's brains.
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Affiliation(s)
- T Li
- From the Departments of Radiology (T.L., X.O.)
- Arkansas Children's Nutrition Center (T.L., T.M.B., B.J.B., S.T.S., X.O.), Little Rock, Arkansas
- Department of Information Sciences (T.L., X.O.), University of Arkansas at Little Rock, Little Rock, Arkansas
| | - T M Badger
- Pediatrics (T.M.B., B.J.B., S.T.S., X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Nutrition Center (T.L., T.M.B., B.J.B., S.T.S., X.O.), Little Rock, Arkansas
| | - B J Bellando
- Pediatrics (T.M.B., B.J.B., S.T.S., X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Nutrition Center (T.L., T.M.B., B.J.B., S.T.S., X.O.), Little Rock, Arkansas
| | - S T Sorensen
- Pediatrics (T.M.B., B.J.B., S.T.S., X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Nutrition Center (T.L., T.M.B., B.J.B., S.T.S., X.O.), Little Rock, Arkansas
| | - X Lou
- Department of Biostatistics (X.L., X.O.), University of Florida, Gainesville, Florida
| | - X Ou
- From the Departments of Radiology (T.L., X.O.)
- Pediatrics (T.M.B., B.J.B., S.T.S., X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Nutrition Center (T.L., T.M.B., B.J.B., S.T.S., X.O.), Little Rock, Arkansas
- Department of Information Sciences (T.L., X.O.), University of Arkansas at Little Rock, Little Rock, Arkansas
- Department of Biostatistics (X.L., X.O.), University of Florida, Gainesville, Florida
- Arkansas Children's Research Institute (X.O.), Little Rock, Arkansas
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Wen CY, Xie ZW, Li YP, Deng XL, Chen XT, Cao Y, Ou X, Lin WY, Li F, Cai WP, Li LH. [Real-world efficacy and safety of lopinavir/ritonavir and arbidol in treating with COVID-19 : an observational cohort study]. Zhonghua Nei Ke Za Zhi 2020; 59:605-609. [PMID: 32388937 DOI: 10.3760/cma.j.cn112138-20200227-00147] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Objective: To evaluate the efficacy and safety of lopinavir/ritonavir (LPV/r) and arbidol in the treatment of COVID-19 in the real world. Methods: The clinical data of 178 patients diagnosed with COVID-19 admitted to Guangzhou Eighth People's Hospital were retrospectively analyzed from January 21 to February 9, 2020. According to the patient's antiviral treatment regimen, 178 patients were divided into 4 groups including LPV/r group (59 patients), arbidol group (36 patients), combination therapy with LPV/r plus arbidol group (25 patients) and the conventional treatment group without any antiviral drugs (58 patients). The main observation end points of the study was the negative conversion time of nucleic acid of the novel coronavirus (2019-nCoV) in pharyngeal swab. Results: The baseline of 4 groups before treatment was consistent and comparable. The negative conversion time of nucleic acid of the 2019-nCoV in pharyngeal swab was (10.20 ± 3.49), (10.11 ± 4.68), (10.86 ± 4.74), (8.44 ± 3.51) days separately in the LPV/r group, the arbidol group, the combination therapy group, and the conventional treatment group without significant difference (F = 2.556, P = 0.058). There was also no significant difference in the rate of negative conversion rate of 2019-nCoV nucleic acid, the improvement ration in clinical symptoms, and the improvement ration of pulmonary infection in the lung CT imaging (P> 0.05). However, a statistically significant difference was found in the proportion of deterioration changing from mild/moderate to severe/critical type at day 7 (χ(2) = 9.311, P = 0.017) as follows: the combination therapy group (24.0%, 6/25), the arbidol group ( 16.7%, 6/36), LPV/r group (5.4%, 3/56) and conventional treatment group (5.2%, 3/58). Moreover, the frequency of adverse reactions in the three groups receiving antiviral drugs was significantly higher than that in the conventional treatment group (χ(2) = 14.875, P = 0.002). Conclusions: No evidences could prove that LPV/r and arbidol could shorten the negative conversion time of novel coronavirus nucleic acid in pharyngeal swab nor improve the symptoms of patients. Furthermore, the combination usage of LPV/r and arbidol may not benefit for improving the disease. Noteworthy, the adverse reactions of the antiviral drugs should be paid careful attention during the treatment.
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Affiliation(s)
- C Y Wen
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - Z W Xie
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - Y P Li
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - X L Deng
- Intensive Care Unit, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - X T Chen
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - Y Cao
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - X Ou
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - W Y Lin
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - F Li
- Institute of Infectious Diseases, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - W P Cai
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
| | - L H Li
- Infectious Disease Center, Guangzhou Eighth People's Hospital, Guangzhou 510060, China
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He S, Wen Q, O’Shea C, Mu-u-min R, Tan X, Ou X, Camelliti P, Pavlovic P, Lei M. A new method of transverse cardiac slicing and optical mapping of murine heart. J Mol Cell Cardiol 2020. [DOI: 10.1016/j.yjmcc.2019.11.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Han JY, Sequist L, Ahn MJ, Cho B, Yu H, Kim SW, Yang JH, Lee J, Su WC, Kowalski D, Orlov S, Cantarini M, Verheijen R, Mellemgaard A, Frewer P, Ou X, Oxnard G. TATTON expansion cohorts: A phase Ib study of osimertinib plus savolitinib in patients (pts) with EGFR-mutant, MET-positive NSCLC following disease progression on a prior EGFR-TKI. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz446.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ou X, Wang G, Shen C, He X, Hu C. Whole-Exome Sequencing Identified Multiple Germline Mutations of DNA Repair Pathway in Patients with and without a Family History of Nasopharyngeal Carcinoma. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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He S, Wen Q, O’Shea C, Mu-u-min R, Kou K, Grassam-Rowe A, Liu Y, Fan Z, Tan X, Ou X, Camelliti P, Pavlovic D, Lei M. A Protocol for Transverse Cardiac Slicing and Optical Mapping in Murine Heart. Front Physiol 2019; 10:755. [PMID: 31293436 PMCID: PMC6603341 DOI: 10.3389/fphys.2019.00755] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 05/31/2019] [Indexed: 01/27/2023] Open
Abstract
Thin living tissue slices have recently emerged as a new tissue model for cardiac electrophysiological research. Slices can be produced from human cardiac tissue, in addition to small and large mammalian hearts, representing a powerful in vitro model system for preclinical and translational heart research. In the present protocol, we describe a detailed mouse heart transverse slicing and optical imaging methodology. The use of this technology for high-throughput optical imaging allows study of electrophysiology of murine hearts in an organotypic pseudo two-dimensional model. The slices are cut at right angles to the long axis of the heart, permitting robust interrogation of transmembrane potential (Vm) and calcium transients (CaT) throughout the entire heart with exceptional regional precision. This approach enables the use of a series of slices prepared from the ventricles to measure Vm and CaT with high temporal and spatial resolution, allowing (i) comparison of successive slices which form a stack representing the original geometry of the heart; (ii) profiling of transmural and regional gradients in Vm and CaT in the ventricle; (iii) characterization of transmural and regional profiles of action potential and CaT alternans under stress (e.g., high frequency pacing or β-adrenergic stimulation) or pathological conditions (e.g., hypertrophy). Thus, the protocol described here provides a powerful platform for innovative research on electrical and calcium handling heterogeneity within the heart. It can be also combined with optogenetic technology to carry out optical stimulation; aiding studies of cellular Vm and CaT in a cell type specific manner.
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Affiliation(s)
- S. He
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - Q. Wen
- Institute of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - C. O’Shea
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, United Kingdom
| | - R. Mu-u-min
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
| | - K. Kou
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - A. Grassam-Rowe
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
| | - Y. Liu
- Department of Cardiovascular Medicine, Southwest Medical University, Luzhou, China
| | - Z. Fan
- Department of Cardiovascular Medicine, Southwest Medical University, Luzhou, China
| | - X. Tan
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - X. Ou
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - P. Camelliti
- School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
| | - D. Pavlovic
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, United Kingdom
| | - M. Lei
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
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Ou X, Zhang J, Wang J, Pang F, Ma X. Ability of models based on clinical parameters and radiomic features from 18F-FDG PET/CT to differentiate breast carcinoma from breast lymphoma using machine-learning approach. Breast 2019. [DOI: 10.1016/s0960-9776(19)30201-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Deoni SC, Adams SH, Li X, Badger TM, Pivik RT, Glasier CM, Ramakrishnaiah RH, Rowell AC, Ou X. Cesarean Delivery Impacts Infant Brain Development. AJNR Am J Neuroradiol 2019; 40:169-177. [PMID: 30467219 DOI: 10.3174/ajnr.a5887] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 10/06/2018] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND PURPOSE The cesarean delivery rate has increased globally in the past few decades. Neurodevelopmental outcomes associated with cesarean delivery are still unclear. This study investigated whether cesarean delivery has any effect on the brain development of offspring. MATERIALS AND METHODS A total of 306 healthy children were studied retrospectively. We included 3 cohorts: 2-week-old neonates (cohort 1, n = 32/11 for vaginal delivery/cesarean delivery) and 8-year-old children (cohort 2, n = 37/23 for vaginal delivery/cesarean delivery) studied at Arkansas Children's Hospital, and a longitudinal cohort of 3-month to 5-year-old children (cohort 3, n = 164/39 for vaginal delivery/cesarean delivery) studied independently at Brown University. Diffusion tensor imaging, myelin water fraction imaging, voxel-based morphometry, and/or resting-state fMRI data were analyzed to evaluate white matter integrity, myelination, gray matter volume, and/or functional connectivity, respectively. RESULTS While not all MR imaging techniques were shared across the institutions/cohorts, post hoc analyses showed similar results of potential effects of cesarean delivery. The cesarean delivery group in cohort 1 showed significantly lower white matter development in widespread brain regions and significantly lower functional connectivity in the brain default mode network, controlled for a number of potential confounders. No group differences were found in cohort 2 in white matter integrity or gray matter volume. Cohort 3 had significantly different trajectories of white matter myelination between groups, with those born by cesarean delivery having reduced myelin in infancy but normalizing with age. CONCLUSIONS Cesarean delivery may influence infant brain development. The impact may be transient because similar effects were not observed in older children. Further prospective and longitudinal studies may be needed to confirm these novel findings.
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Affiliation(s)
- S C Deoni
- School of Engineering (S.C.D.), Brown University, Providence, Rhode Island
| | - S H Adams
- From the Arkansas Children's Nutrition Center (S.H.A., T.M.B., R.T.P., X.O.), Little Rock, Arkansas
- Pediatrics (S.H.A., T.M.B., R.T.P., C.M.G., X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - X Li
- Departments of Radiology (X.L., C.M.G., R.H.R., A.C.R., X.O.)
| | - T M Badger
- From the Arkansas Children's Nutrition Center (S.H.A., T.M.B., R.T.P., X.O.), Little Rock, Arkansas
- Pediatrics (S.H.A., T.M.B., R.T.P., C.M.G., X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - R T Pivik
- From the Arkansas Children's Nutrition Center (S.H.A., T.M.B., R.T.P., X.O.), Little Rock, Arkansas
- Pediatrics (S.H.A., T.M.B., R.T.P., C.M.G., X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - C M Glasier
- Departments of Radiology (X.L., C.M.G., R.H.R., A.C.R., X.O.)
- Pediatrics (S.H.A., T.M.B., R.T.P., C.M.G., X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Research Institute (C.M.G., R.H.R., A.C.R., X.O.), Little Rock, Arkansas
| | - R H Ramakrishnaiah
- Departments of Radiology (X.L., C.M.G., R.H.R., A.C.R., X.O.)
- Arkansas Children's Research Institute (C.M.G., R.H.R., A.C.R., X.O.), Little Rock, Arkansas
| | - A C Rowell
- Departments of Radiology (X.L., C.M.G., R.H.R., A.C.R., X.O.)
- Arkansas Children's Research Institute (C.M.G., R.H.R., A.C.R., X.O.), Little Rock, Arkansas
| | - X Ou
- From the Arkansas Children's Nutrition Center (S.H.A., T.M.B., R.T.P., X.O.), Little Rock, Arkansas
- Departments of Radiology (X.L., C.M.G., R.H.R., A.C.R., X.O.)
- Pediatrics (S.H.A., T.M.B., R.T.P., C.M.G., X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Research Institute (C.M.G., R.H.R., A.C.R., X.O.), Little Rock, Arkansas
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Ou X, Glasier CM, Ramakrishnaiah RH, Kanfi A, Rowell AC, Pivik RT, Andres A, Cleves MA, Badger TM. Gestational Age at Birth and Brain White Matter Development in Term-Born Infants and Children. AJNR Am J Neuroradiol 2017; 38:2373-2379. [PMID: 29025726 DOI: 10.3174/ajnr.a5408] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 07/22/2017] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Studies on infants and children born preterm have shown that adequate gestational length is critical for brain white matter development. Less is known regarding how variations in gestational age at birth in term infants and children affect white matter development, which was evaluated in this study. MATERIALS AND METHODS Using DTI tract-based spatial statistics methods, we evaluated white matter microstructures in 2 groups of term-born (≥37 weeks of gestation) healthy subjects: 2-week-old infants (n = 44) and 8-year-old children (n = 63). DTI parameters including fractional anisotropy, mean diffusivity, axial diffusivity, and radial diffusivity were calculated by voxelwise and ROI methods and were correlated with gestational age at birth, with potential confounding factors such as postnatal age and sex controlled. RESULTS Fractional anisotropy values, which are markers for white matter microstructural integrity, positively correlated (P < .05, corrected) with gestational age at birth in most major white matter tracts/regions for the term infants. Mean diffusivity values, which are measures of water diffusivities in the brain, and axial and radial diffusivity values, which are markers for axonal growth and myelination, respectively, negatively correlated (P < .05, corrected) with gestational age at birth in all major white matter tracts/regions excluding the body and splenium of the corpus callosum for the term infants. No significant correlations with gestational age were observed for any tracts/regions for the term-born 8-year-old children. CONCLUSIONS Our results indicate that longer gestation during the normal term period is associated with significantly greater infant white matter development (as reflected by higher fractional anisotropy and lower mean diffusivity, axial diffusivity, and radial diffusivity values); however, similar associations were not observable in later childhood.
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Affiliation(s)
- X Ou
- From the Departments of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.)
- Pediatrics (X.O., C.M.G., R.T.P., A.A., M.A.C., T.M.B.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Nutrition Center (X.O., R.T.P., A.A., T.M.B.), Little Rock, Arkansas
- Department of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.), Arkansas Children's Hospital, Little Rock, Arkansas
| | - C M Glasier
- From the Departments of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.)
- Pediatrics (X.O., C.M.G., R.T.P., A.A., M.A.C., T.M.B.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Department of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.), Arkansas Children's Hospital, Little Rock, Arkansas
| | - R H Ramakrishnaiah
- From the Departments of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.)
- Department of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.), Arkansas Children's Hospital, Little Rock, Arkansas
| | - A Kanfi
- From the Departments of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.)
- Department of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.), Arkansas Children's Hospital, Little Rock, Arkansas
| | - A C Rowell
- From the Departments of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.)
- Department of Radiology (X.O., C.M.G., R.H.R., A.K., A.C.R.), Arkansas Children's Hospital, Little Rock, Arkansas
| | - R T Pivik
- Pediatrics (X.O., C.M.G., R.T.P., A.A., M.A.C., T.M.B.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Nutrition Center (X.O., R.T.P., A.A., T.M.B.), Little Rock, Arkansas
| | - A Andres
- Pediatrics (X.O., C.M.G., R.T.P., A.A., M.A.C., T.M.B.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Nutrition Center (X.O., R.T.P., A.A., T.M.B.), Little Rock, Arkansas
| | - M A Cleves
- Pediatrics (X.O., C.M.G., R.T.P., A.A., M.A.C., T.M.B.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - T M Badger
- Pediatrics (X.O., C.M.G., R.T.P., A.A., M.A.C., T.M.B.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Arkansas Children's Nutrition Center (X.O., R.T.P., A.A., T.M.B.), Little Rock, Arkansas
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Miao Y, Ou X, Wang J, Wang X, He X, Shen C, Ying H, Hu W, Hu C. Development and Validation of a Model for Temporal Lobe Necrosis Based on 749 Nasopharyngeal Carcinoma Patients Following IMRT. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ou X, Miao Y, Hu C. The Feasibility of Selectively Omission of Radiation to Level IB Lymph Nodes in Low-Risk Nasopharyngeal Carcinoma. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ou X, Shen C, Wang X, Ying H, He X, Hu C. Residual Disease at the Late Course of Intensity Modulated Radiation Therapy in Nasopharyngeal Carcinoma: An Adverse Prognostic Factor and Potential Role of Boost Irradiation and Adjuvant Chemotherapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ou X, Zhou X, Shi Q, Xing X, Yang Y, Jiang W, Hu C. Does an Adequate Dose of Cisplatin Need to Achieve Better Disease Control and Overall Survival in Locally Advanced Nasopharyngeal Carcinoma? Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Metcalfe AWS, MacIntosh BJ, Scavone A, Ou X, Korczak D, Goldstein BI. Effects of acute aerobic exercise on neural correlates of attention and inhibition in adolescents with bipolar disorder. Transl Psychiatry 2016; 6:e814. [PMID: 27187236 PMCID: PMC5070058 DOI: 10.1038/tp.2016.85] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 03/29/2016] [Accepted: 03/31/2016] [Indexed: 12/15/2022] Open
Abstract
Executive dysfunction is common during and between mood episodes in bipolar disorder (BD), causing social and functional impairment. This study investigated the effect of acute exercise on adolescents with BD and healthy control subjects (HC) to test for positive or negative consequences on neural response during an executive task. Fifty adolescents (mean age 16.54±1.47 years, 56% female, 30 with BD) completed an attention and response inhibition task before and after 20 min of recumbent cycling at ~70% of age-predicted maximum heart rate. 3 T functional magnetic resonance imaging data were analyzed in a whole brain voxel-wise analysis and as regions of interest (ROI), examining Go and NoGo response events. In the whole brain analysis of Go trials, exercise had larger effect in BD vs HC throughout ventral prefrontal cortex, amygdala and hippocampus; the profile of these effects was of greater disengagement after exercise. Pre-exercise ROI analysis confirmed this 'deficit in deactivation' for BDs in rostral ACC and found an activation deficit on NoGo errors in accumbens. Pre-exercise accumbens NoGo error activity correlated with depression symptoms and Go activity with mania symptoms; no correlations were present after exercise. Performance was matched to controls and results survived a series of covariate analyses. This study provides evidence that acute aerobic exercise transiently changes neural response during an executive task among adolescents with BD, and that pre-exercise relationships between symptoms and neural response are absent after exercise. Acute aerobic exercise constitutes a biological probe that may provide insights regarding pathophysiology and treatment of BD.
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Affiliation(s)
- A W S Metcalfe
- Centre for Youth Bipolar Disorder, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Brain Sciences, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Heart and Stroke Foundation Canadian Partnership for Stroke Recovery, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - B J MacIntosh
- Brain Sciences, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Heart and Stroke Foundation Canadian Partnership for Stroke Recovery, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
- Department of Physical Sciences, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - A Scavone
- Centre for Youth Bipolar Disorder, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - X Ou
- Centre for Youth Bipolar Disorder, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Department of Pharmacology, University of Toronto, Toronto, ON, Canada
| | - D Korczak
- Hospital for Sick Children, Toronto, ON, Canada
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada
| | - B I Goldstein
- Centre for Youth Bipolar Disorder, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Heart and Stroke Foundation Canadian Partnership for Stroke Recovery, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Department of Pharmacology, University of Toronto, Toronto, ON, Canada
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada
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Ou X, Pan W, Zhang X, Xiao P. Skin image retrieval using Gabor wavelet texture feature. Int J Cosmet Sci 2016; 38:607-614. [PMID: 27068932 DOI: 10.1111/ics.12332] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 03/12/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Skin imaging plays a key role in many clinical studies. We have used many skin imaging techniques, including the recently developed capacitive contact skin imaging based on fingerprint sensors. The aim of this study was to develop an effective skin image retrieval technique using Gabor wavelet transform, which can be used on different types of skin images, but with a special focus on skin capacitive contact images. METHODS Content-based image retrieval (CBIR) is a useful technology to retrieve stored images from database by supplying query images. In a typical CBIR, images are retrieved based on colour, shape, texture, etc. In this study, texture feature is used for retrieving skin images, and Gabor wavelet transform is used for texture feature description and extraction. RESULTS The results show that the Gabor wavelet texture features can work efficiently on different types of skin images. Although Gabor wavelet transform is slower compared with other image retrieval techniques, such as principal component analysis (PCA) and grey-level co-occurrence matrix (GLCM), Gabor wavelet transform is the best for retrieving skin capacitive contact images and facial images with different orientations. Gabor wavelet transform can also work well on facial images with different expressions and skin cancer/disease images. CONCLUSION We have developed an effective skin image retrieval method based on Gabor wavelet transform, that it is useful for retrieving different types of images, namely digital colour face images, digital colour skin cancer and skin disease images, and particularly greyscale skin capacitive contact images. Gabor wavelet transform can also be potentially useful for face recognition (with different orientation and expressions) and skin cancer/disease diagnosis.
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Affiliation(s)
- X Ou
- College of Communication Engineering, Chongqing University, Chongqing, 400044, China
| | - W Pan
- School of Engineering, London South Bank University, 103 Borough Road, London, SE1 0AA, UK
| | - X Zhang
- School of Engineering, London South Bank University, 103 Borough Road, London, SE1 0AA, UK
| | - P Xiao
- School of Engineering, London South Bank University, 103 Borough Road, London, SE1 0AA, UK
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Ou X, Andres A, Pivik RT, Cleves MA, Snow JH, Ding Z, Badger TM. Voxel-Based Morphometry and fMRI Revealed Differences in Brain Gray Matter in Breastfed and Milk Formula-Fed Children. AJNR Am J Neuroradiol 2015; 37:713-9. [PMID: 26585259 DOI: 10.3174/ajnr.a4593] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 09/10/2015] [Indexed: 02/04/2023]
Abstract
BACKGROUND AND PURPOSE Infant diets may have significant impact on brain development in children. The aim of this study was to evaluate brain gray matter structure and function in 8-year-old children who were predominantly breastfed or fed cow's milk formula as infants. MATERIALS AND METHODS Forty-two healthy children (breastfed: n = 22, 10 boys and 12 girls; cow's milk formula: n = 20, 10 boys and 10 girls) were studied by using structural MR imaging (3D T1-weighted imaging) and blood oxygen level-dependent fMRI (while performing tasks involving visual perception and language functions). They were also administered standardized tests evaluating intelligence (Reynolds Intellectual Assessment Scales) and language skills (Clinical Evaluation of Language Fundamentals). RESULTS Total brain gray matter volume did not differ between the breastfed and cow's milk formula groups. However, breastfed children had significantly higher (P < .05, corrected) regional gray matter volume measured by voxel-based morphometry in the left inferior temporal lobe and left superior parietal lobe compared with cow's milk formula-fed children. Breastfed children showed significantly more brain activation in the right frontal and left/right temporal lobes on fMRI when processing the perception task and in the left temporal/occipital lobe when processing the visual language task than cow's milk formula-fed children. The imaging findings were associated with significantly better performance for breastfed than cow's milk formula-fed children on both tasks. CONCLUSIONS Our findings indicated greater regional gray matter development and better regional gray matter function in breastfed than cow's milk formula-fed children at 8 years of age and suggested that infant diets may have long-term influences on brain development in children.
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Affiliation(s)
- X Ou
- From the Arkansas Children's Nutrition Center (X.O., A.A., R.T.P., M.A.C., T.M.B.) Departments of Pediatrics (X.O., A.A., R.T.P., M.A.C., J.H.S., T.M.B.) Radiology (X.O.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - A Andres
- From the Arkansas Children's Nutrition Center (X.O., A.A., R.T.P., M.A.C., T.M.B.) Departments of Pediatrics (X.O., A.A., R.T.P., M.A.C., J.H.S., T.M.B.)
| | - R T Pivik
- Departments of Pediatrics (X.O., A.A., R.T.P., M.A.C., J.H.S., T.M.B.)
| | - M A Cleves
- From the Arkansas Children's Nutrition Center (X.O., A.A., R.T.P., M.A.C., T.M.B.) Departments of Pediatrics (X.O., A.A., R.T.P., M.A.C., J.H.S., T.M.B.)
| | - J H Snow
- Departments of Pediatrics (X.O., A.A., R.T.P., M.A.C., J.H.S., T.M.B.)
| | - Z Ding
- Vanderbilt University Institute of Imaging Sciences (Z.D.), Nashville, Tennessee
| | - T M Badger
- From the Arkansas Children's Nutrition Center (X.O., A.A., R.T.P., M.A.C., T.M.B.) Departments of Pediatrics (X.O., A.A., R.T.P., M.A.C., J.H.S., T.M.B.)
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Ou X, Han Q, Wang CH. Molecular dynamics analysis on tensile properties of carbon nanotubes with different cracks. Molecular Simulation 2015. [DOI: 10.1080/08927022.2015.1089993] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Xie J, Broxmeyer HE, Feng D, Schweitzer KS, Yi R, Cook TG, Chitteti BR, Barwinska D, Traktuev DO, Van Demark MJ, Justice MJ, Ou X, Srour EF, Prockop DJ, Petrache I, March KL. Human adipose-derived stem cells ameliorate cigarette smoke-induced murine myelosuppression via secretion of TSG-6. Stem Cells 2015; 33:468-78. [PMID: 25329668 DOI: 10.1002/stem.1851] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 08/20/2014] [Indexed: 01/18/2023]
Abstract
OBJECTIVE Bone marrow-derived hematopoietic stem and progenitor cells (HSC/HPC) are critical to homeostasis and tissue repair. The aims of this study were to delineate the myelotoxicity of cigarette smoking (CS) in a murine model, to explore human adipose-derived stem cells (hASC) as a novel approach to mitigate this toxicity, and to identify key mediating factors for ASC activities. METHODS C57BL/6 mice were exposed to CS with or without i.v. injection of regular or siRNA-transfected hASC. For in vitro experiments, cigarette smoke extract was used to mimic the toxicity of CS exposure. Analysis of bone marrow HPC was performed both by flow cytometry and colony-forming unit assays. RESULTS In this study, we demonstrate that as few as 3 days of CS exposure results in marked cycling arrest and diminished clonogenic capacity of HPC, followed by depletion of phenotypically defined HSC/HPC. Intravenous injection of hASC substantially ameliorated both acute and chronic CS-induced myelosuppression. This effect was specifically dependent on the anti-inflammatory factor TSG-6, which is induced from xenografted hASC, primarily located in the lung and capable of responding to host inflammatory signals. Gene expression analysis within bone marrow HSC/HPC revealed several specific signaling molecules altered by CS and normalized by hASC. CONCLUSION Our results suggest that systemic administration of hASC or TSG-6 may be novel approaches to reverse CS-induced myelosuppression.
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Affiliation(s)
- Jie Xie
- Department of Cellular & Integrative Physiology, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, Indiana, USA; Indiana Center for Vascular Biology and Medicine, VC-CAST Signature Center, Department of Medicine, Herman B Wells Center for Pediatric Research, Indiana University, Indianapolis, Indiana, USA; VA Center for Regenerative Medicine Indianapolis, "Richard L. Roudebush" VA Medical Center, Indianapolis, Indiana, USA
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Ou X, Lee MR, Huang X, Messina-Graham S, Broxmeyer HE. SIRT1 positively regulates autophagy and mitochondria function in embryonic stem cells under oxidative stress. Stem Cells 2014; 32:1183-94. [PMID: 24449278 DOI: 10.1002/stem.1641] [Citation(s) in RCA: 249] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 12/03/2013] [Indexed: 12/13/2022]
Abstract
SIRT1, an NAD-dependent deacetylase, plays a role in regulation of autophagy. SIRT1 increases mitochondrial function and reduces oxidative stress, and has been linked to age-related reactive oxygen species (ROS) generation, which is highly dependent on mitochondrial metabolism. H2O2 induces oxidative stress and autophagic cell death through interference with Beclin 1 and the mTOR signaling pathways. We evaluated connections between SIRT1 activity and induction of autophagy in murine (m) and human (h) embryonic stem cells (ESCs) upon ROS challenge. Exogenous H2 O2 (1 mM) induced apoptosis and autophagy in wild-type (WT) and Sirt1-/- mESCs. High concentrations of H2O2 (1 mM) induced more apoptosis in Sirt1-/-, than in WT mESCs. However, addition of 3-methyladenine, a widely used autophagy inhibitor, in combination with H2O2 induced more cell death in WT than in Sirt1-/- mESCs. Decreased induction of autophagy in Sirt1-/- mESCs was demonstrated by decreased conversion of LC3-I to LC3-II, lowered expression of Beclin-1, and decreased LC3 punctae and LysoTracker staining. H2O2 induced autophagy with loss of mitochondrial membrane potential and disruption of mitochondrial dynamics in Sirt1-/- mESCs. Increased phosphorylation of P70/85-S6 kinase and ribosomal S6 was noted in Sirt1-/- mESCs, suggesting that SIRT1 regulates the mTOR pathway. Consistent with effects in mESCs, inhibition of SIRT1 using Lentivirus-mediated SIRT1 shRNA in hESCs demonstrated that knockdown of SIRT1 decreased H2O2-induced autophagy. This suggests a role for SIRT1 in regulating autophagy and mitochondria function in ESCs upon oxidative stress, effects mediated at least in part by the class III PI3K/Beclin 1 and mTOR pathways.
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Affiliation(s)
- Xuan Ou
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, USA
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Ou X, Glasier CM, Ramakrishnaiah RH, Mulkey SB, Ding Z, Angtuaco TL, Andres A, Kaiser JR. Impaired white matter development in extremely low-birth-weight infants with previous brain hemorrhage. AJNR Am J Neuroradiol 2014; 35:1983-9. [PMID: 24874534 DOI: 10.3174/ajnr.a3988] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND AND PURPOSE Brain hemorrhage is common in premature infants. The purpose of the study is to evaluate white matter development in extremely low-birth-weight infants with or without previous brain hemorrhage. MATERIALS AND METHODS Thirty-three extremely low-birth-weight infants were prospectively enrolled and included in this institutional review board-approved study. Another 10 healthy term infants were included as controls. The medical records of the extremely low-birth-weight infants were reviewed for sonography diagnosis of intraventricular hemorrhage. All infants had an MR imaging examination at term-equivalent age for detection of previous hemorrhage, and their white matter was scored and compared among different groups. DTI measured fractional anisotropy values were also compared voxelwise by tract-based spatial statistics. RESULTS Compared with controls, the white matter score was not significantly different in extremely low-birth-weight infants without blood deposition on MR imaging (P = .17), but was significantly worse in extremely low-birth-weight infants with blood deposition on MR imaging but no intraventricular hemorrhage diagnosis by sonography (P = .02), in extremely low-birth-weight infants with grade 1 or 2 intraventricular hemorrhage on sonography (P = .003), and in extremely low-birth-weight infants with grade 3 or 4 intraventricular hemorrhage on sonography (P = .0001). Extremely low-birth-weight infants without blood deposition on MR imaging did not show any white matter regions with significantly lower fractional anisotropy values than controls. Extremely low-birth-weight infants with blood deposition on MR imaging, but no intraventricular hemorrhage diagnosis, did show white matter regions with significantly lower fractional anisotropy values, and extremely low-birth-weight infants with intraventricular hemorrhage diagnosis had widespread white matter regions with lower fractional anisotropy values. CONCLUSIONS Previous brain hemorrhage is associated with abnormal white matter in extremely low-birth-weight infants at term-equivalent age, and sonography is not sensitive to minor hemorrhages that are sufficient to cause white matter injury.
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Affiliation(s)
- X Ou
- From the Department of Radiology (X.O., C.M.G., R.H.R., T.L.A.), University of Arkansas for Medical Sciences, Little Rock, Arkansas Pediatric Radiology (X.O., C.M.G., R.H.R.), Arkansas Children's Hospital, Little Rock, Arkansas
| | - C M Glasier
- From the Department of Radiology (X.O., C.M.G., R.H.R., T.L.A.), University of Arkansas for Medical Sciences, Little Rock, Arkansas Pediatric Radiology (X.O., C.M.G., R.H.R.), Arkansas Children's Hospital, Little Rock, Arkansas
| | - R H Ramakrishnaiah
- From the Department of Radiology (X.O., C.M.G., R.H.R., T.L.A.), University of Arkansas for Medical Sciences, Little Rock, Arkansas Pediatric Radiology (X.O., C.M.G., R.H.R.), Arkansas Children's Hospital, Little Rock, Arkansas
| | | | - Z Ding
- Vanderbilt University Institute of Imaging Sciences (Z.D.), Nashville, Tennessee
| | - T L Angtuaco
- From the Department of Radiology (X.O., C.M.G., R.H.R., T.L.A.), University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - A Andres
- Departments Pediatrics (S.B.M., A.A.) Arkansas Children's Nutrition Center (A.A.), Little Rock, Arkansas
| | - J R Kaiser
- Departments of Pediatrics and Obstetrics and Gynecology, Section of Neonatology (J.R.K.), Baylor College of Medicine, Texas Children's Hospital, Houston, Texas
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Pivik R, Andres A, Snow J, Ou X, Casey P, Cleves M, Badger T. Semantic memory processing is enhanced in preadolescents breastfed compared to those formula‐fed as infants: An ERP N400 study of sentential semantic congruity (629.1). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.629.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- R Pivik
- Arkansas Children's Nutrition CenterLITTLE RocKARUnited States
- Pediatrics University of Arkansas for Medical SciencesLITTLE RocKARUnited States
| | - A Andres
- Arkansas Children's Nutrition CenterLITTLE RocKARUnited States
- Pediatrics University of Arkansas for Medical SciencesLITTLE RocKARUnited States
| | - J Snow
- Pediatrics University of Arkansas for Medical SciencesLITTLE RocKARUnited States
| | - X Ou
- Radiology University of Arkansas for Medical SciencesLITTLE RocKARUnited States
| | - P Casey
- Pediatrics University of Arkansas for Medical SciencesLITTLE RocKARUnited States
| | - M Cleves
- Arkansas Children's Nutrition CenterLITTLE RocKARUnited States
- Pediatrics University of Arkansas for Medical SciencesLITTLE RocKARUnited States
| | - T Badger
- Arkansas Children's Nutrition CenterLITTLE RocKARUnited States
- Pediatrics University of Arkansas for Medical SciencesLITTLE RocKARUnited States
- Physiology and Biophysics University of Arkansas for Medical SciencesLITTLE RocKARUnited States
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Wang B, Yang J, Xiao J, Liang B, Zhou HX, Su Z, Xu S, Chen H, Ma C, Deng J, Li D, Zhou H, Ou X, Feng Y. Association of XRCC5 polymorphisms with COPD and COPD-related phenotypes in the Han Chinese population: a case-control cohort study. Genet Mol Res 2014; 13:7070-8. [PMID: 24615081 DOI: 10.4238/2014.january.24.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Genome-wide association studies (GWAS) and integrative genomic approaches have demonstrated significant associations between chronic obstructive pulmonary disease (COPD) and polymorphisms of the X-ray repair cross-complementing protein 5 gene (XRCC5) in non-Asian populations. We investigated whether XRCC5 polymorphisms might be associated with COPD susceptibility and COPD-related phenotypes in the Chinese Han population. Nine single nucleotide polymorphisms (SNPs) (rs3821104, rs12470053, rs207936, rs3770498, rs6704622, rs3770492, rs4674066, rs7573191, and rs207906) in the XRCC5 gene were genotyped in a case-control study including 680 COPD patients and 687 controls. To estimate the strength of association, odds ratios (ORs) were calculated and the effects of potentially confounding variables were tested by logistic regression analysis. The association between haplotypes and COPD outcome was also assessed. Our data identified that the SNP rs207936 was associated with COPD with an adjusted P value of 0.038, which was also found when analyzing only data of current smokers (P=0.046). No significant associations were found between any of the SNPs and pulmonary function. Eight SNPs (rs3821104, rs12470053, rs207936, rs3770498, rs6704622, rs3770492, rs4674066, and rs7573191) showed strong linkage disequilibrium (R2≥0.9). Two major haplotypes were observed and showed a significant difference between case and control groups (P=0.0054 and 0.0081, respectively). The present study showed that the XRCC5 locus might be a contributor to COPD susceptibility in the Chinese Han population.
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Affiliation(s)
- B Wang
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - J Yang
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - J Xiao
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - B Liang
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - H X Zhou
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Z Su
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - S Xu
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - H Chen
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - C Ma
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - J Deng
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - D Li
- The Second People's Hospital of Hongya County, Meishan, Sichuan, China
| | - H Zhou
- The Second People's Hospital of Hongya County, Meishan, Sichuan, China
| | - X Ou
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Y Feng
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Broxmeyer HE, Mor-Vaknin N, Kappes F, Legendre M, Saha AK, Ou X, O'Leary H, Capitano M, Cooper S, Markovitz DM. Concise review: role of DEK in stem/progenitor cell biology. Stem Cells 2013; 31:1447-53. [PMID: 23733396 PMCID: PMC3814160 DOI: 10.1002/stem.1443] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/06/2013] [Accepted: 05/08/2013] [Indexed: 12/19/2022]
Abstract
Understanding the factors that regulate hematopoiesis opens up the possibility of modifying these factors and their actions for clinical benefit. DEK, a non-histone nuclear phosphoprotein initially identified as a putative proto-oncogene, has recently been linked to regulate hematopoiesis. DEK has myelosuppressive activity in vitro on proliferation of human and mouse hematopoietic progenitor cells and enhancing activity on engraftment of long-term marrow repopulating mouse stem cells, has been linked in coordinate regulation with the transcription factor C/EBPα, for differentiation of myeloid cells, and apparently targets a long-term repopulating hematopoietic stem cell for leukemic transformation. This review covers the uniqueness of DEK, what is known about how it now functions as a nuclear protein and also as a secreted molecule that can act in paracrine fashion, and how it may be regulated in part by dipeptidylpeptidase 4, an enzyme known to truncate and modify a number of proteins involved in activities on hematopoietic cells. Examples are provided of possible future areas of investigation needed to better understand how DEK may be regulated and function as a regulator of hematopoiesis, information possibly translatable to other normal and diseased immature cell systems.
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Affiliation(s)
- Hal E Broxmeyer
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana.
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Ou X, O'Leary HA, Broxmeyer HE. Implications of DPP4 modification of proteins that regulate stem/progenitor and more mature cell types. Blood 2013; 122:161-9. [PMID: 23637126 PMCID: PMC3709652 DOI: 10.1182/blood-2013-02-487470] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 04/14/2013] [Indexed: 12/28/2022] Open
Abstract
Dipeptidylpeptidase (DPP) 4 has the potential to truncate proteins with a penultimate alanine, proline, or other selective amino acids at the N-terminus. DPP4 truncation of certain chemokines, colony-stimulating factors, and interleukins have recently been linked to regulation of hematopoietic stem/progenitor cells, more mature blood cells, and other cell types. We believe that the potential role of DPP4 in modification of many regulatory proteins, and their subsequent effects on numerous stem/progenitor and other cell-type functions has not been adequately appreciated. This review addresses the potential implications of the modifying effects of DPP4 on a large number of cytokines and other growth-regulating factors with either proven or putative DPP4 truncation sites on hematopoietic cells, and subsequent effects of DPP4-truncated proteins on multiple aspects of steady-state and stressed hematopoiesis, including stem/progenitor cell, and more mature cell, function.
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Affiliation(s)
- Xuan Ou
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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Liu Y, Timani K, Ou X, Broxmeyer HE, He JJ. C-MYC controlled TIP110 protein expression regulates OCT4 mRNA splicing in human embryonic stem cells. Stem Cells Dev 2012; 22:689-94. [PMID: 23088399 DOI: 10.1089/scd.2012.0271] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
We reported previously that HIV-1 the Tat-interacting protein of 110 kDa (TIP110; P110(NRB)/SART3/p110) is important in regulation of hematopoiesis, and in maintaining pluripotent factor (NANOG, OCT4, and SOX2) expression in and pluripotency of human embryonic stem cells (hESCs). Here we show that TIP110 expression in hESCs line H9 and embryonal carcinoma cell line NT-2 is regulated by C-MYC expression in ESCs through an E box present in the TIP110 promoter region. Through up- and down- modulation of expression, TIP110 induces OCT4 exon 1a inclusion and exon 1b skipping in our OCT4 minigene model. Thus, TIP110 expression in ESCs regulates alternative splicing of OCT4, an event required for pluripotency of ESCs.
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Affiliation(s)
- Ying Liu
- Department of Cell Biology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas 76092, USA.
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Ou X, Cheng J, Zhang Y, Hu C. Preliminary Results of 18 F-FMISO PET in Evaluating Tumor Hypoxia and Predicting Response to Chemoradiation Therapy in Nasopharyngeal Carcinoma. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Taylor T, Kim YJ, Ou X, Derbigny W, Broxmeyer HE. Toll-like receptor 2 mediates proliferation, survival, NF-kappaB translocation, and cytokine mRNA expression in LIF-maintained mouse embryonic stem cells. Stem Cells Dev 2011; 19:1333-41. [PMID: 20132051 DOI: 10.1089/scd.2009.0484] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Toll-like receptor (TLR) activation is important in immune responses and in differentiation of hematopoietic stem cells. We detected mRNA expression of TLRs 1, 2, 3, 5, and 6, but not TLRs 4, 7, 8, and 9 in murine (m)ESC line E14, and noted high cell surface protein expression of TLR2, but not TLR4, for mESC lines R1, CGR8, and E14. ESC lines were cultured in the presence of leukemia inhibitory factor (LIF). Pam(3)Cys enhanced proliferation and survival of the 3 ESC lines. In contrast, lipopolysaccharide (LPS) decreased proliferation and survival. Pam(3)Cys and LPS effects on proliferation and survival were blocked by antibody to TLR2, suggesting that effects of both Pam(3)Cys and LPS on these mESC lines were likely mediated through TLR2. E14 ESC line expressed MyD88. Pam(3)Cys stimulation of E14 ESCs was associated with induced NF-kappaB translocation, enhanced phosphorylation of IKK-alpha/beta, and enhanced mRNA, but not protein, expression of tumor necrosis factor-alpha, interferon-gamma, and IL-6. TLR2 activation by Pam(3)Cys or inhibition by LPS was not associated with changes in morphology or expression of alkaline phosphatase, Oct4, SSEA1, KLF4, or Sox2, markers of undifferentiated mESCs. Our studies identify TLR2 as present and functional in E14, R1, and CGR8 mESC lines.
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Affiliation(s)
- Tammi Taylor
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA
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Ou X, Zhang B, Zhang L, Dong K, Liu C, Zhao G, Ding X. SarA influences the sporulation and secondary metabolism in Streptomyces coelicolor M145. Acta Biochim Biophys Sin (Shanghai) 2008. [DOI: 10.1093/abbs/40.10.877] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Han MK, Song EK, Guo Y, Ou X, Mantel C, Broxmeyer HE. SIRT1 regulates apoptosis and Nanog expression in mouse embryonic stem cells by controlling p53 subcellular localization. Cell Stem Cell 2008; 2:241-51. [PMID: 18371449 DOI: 10.1016/j.stem.2008.01.002] [Citation(s) in RCA: 297] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2007] [Revised: 10/25/2007] [Accepted: 01/02/2008] [Indexed: 12/12/2022]
Abstract
Nuclear tumor suppressor p53 transactivates proapoptotic genes or antioxidant genes depending on stress severity, while cytoplasmic p53 induces mitochondrial-dependent apoptosis without gene transactivation. Although SIRT1, a p53 deacetylase, inhibits p53-mediated transactivation, how SIRT1 regulates these p53 multifunctions is unclear. Here we show that SIRT1 blocks nuclear translocation of cytoplasmic p53 in response to endogenous reactive oxygen species (ROS) and triggers mitochondrial-dependent apoptosis in mouse embryonic stem (mES) cells. ROS generated by antioxidant-free culture caused p53 translocation into mitochondria in wild-type mES cells but induced p53 translocation into the nucleus in SIRT1(-/-) mES cells. Endogenous ROS triggered apoptosis of wild-type mES through mitochondrial translocation of p53 and BAX but inhibited Nanog expression of SIRT1(-/-) mES, indicating that SIRT1 makes mES cells sensitive to ROS and inhibits p53-mediated suppression of Nanog expression. Our results suggest that endogenous ROS control is important for mES cell maintenance in culture.
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Affiliation(s)
- Myung-Kwan Han
- Department of Microbiology and Immunology, Walther Oncology Center, Indiana University School of Medicine, Indianapolis, IN 46202-5181, USA.
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Li H, Ou X, Xiong J. Modified HPV16 E7/HSP70 DNA vaccine with high safety and enhanced cellular immunity represses murine lung metastatic tumors with downregulated expression of MHC class I molecules. Gynecol Oncol 2007; 104:564-71. [PMID: 17081598 DOI: 10.1016/j.ygyno.2006.09.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2006] [Revised: 09/13/2006] [Accepted: 09/28/2006] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To explore whether the modified E7-HSP70, which has been introduced mutations in two zinc-binding motifs of E7, will eliminate its transformation potential and enhance the immunogenicity of fusion protein and repress E7 containing tumors with a low level of MHC-I molecules to lung metastatic in murine model. METHODS In this study, we examined the transforming properties of mutant E7 oncoprotein by the soft agar colony-formation assays, explored the immunogenicity of modified E7-HSP70 gene by various cellular and humor immune responses and evaluated the effect of treating lung metastatic tumor with a low expressing MHC-I molecules by tumor challenge assay and therapeutic experiment. RESULTS The mutant E7 oncoprotein has completely lost its transforming properties as measured in the soft agar colony-formation assays. Modified E7-HSP70 gene inducted stronger E7-specific cellular immune response than that induced by unmodified E7-HSP70. More importantly, the new construct significantly reduced the number of B16-HPV16E7 lung metastases. CONCLUSION The modified E7-HSP70 gene may be as a powerful and safe DNA vaccine in controlling the hematogenous spread of HPV16E7-associated tumors with low expression of MHC-I molecules. In addition, the B16-HPV16E7 lung metastasis model can be used to test the efficacy of various E7-specific vaccines and immunotherapeutic strategies in settings more relevant to clinical requirements.
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MESH Headings
- Animals
- Antibody Specificity
- CD4-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/immunology
- Cancer Vaccines/genetics
- Cancer Vaccines/immunology
- Cancer Vaccines/pharmacology
- Cell Transformation, Viral/genetics
- Cell Transformation, Viral/immunology
- Female
- HSP70 Heat-Shock Proteins/genetics
- HSP70 Heat-Shock Proteins/immunology
- Histocompatibility Antigens Class I/biosynthesis
- Histocompatibility Antigens Class I/genetics
- Interferon-gamma/biosynthesis
- Interferon-gamma/genetics
- Lung Neoplasms/immunology
- Lung Neoplasms/secondary
- Lung Neoplasms/therapy
- Melanoma, Experimental/immunology
- Melanoma, Experimental/secondary
- Melanoma, Experimental/therapy
- Mice
- Mice, Inbred C57BL
- NIH 3T3 Cells
- Oncogene Proteins, Viral/genetics
- Oncogene Proteins, Viral/immunology
- Papillomavirus E7 Proteins
- Recombinant Fusion Proteins/genetics
- Recombinant Fusion Proteins/immunology
- Up-Regulation
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
- Vaccines, DNA/pharmacology
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Affiliation(s)
- Hui Li
- Center for Human Genome Research and College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei, 430074, P.R. China.
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Li H, Ou X, Xiong J, Wang T. HPV16E7 mediates HADC chromatin repression and downregulation of MHC class I genes in HPV16 tumorigenic cells through interaction with an MHC class I promoter. Biochem Biophys Res Commun 2006; 349:1315-21. [PMID: 16979588 DOI: 10.1016/j.bbrc.2006.08.182] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2006] [Accepted: 08/30/2006] [Indexed: 01/08/2023]
Abstract
Downregulation of the expression of major histocompatibility complex class I antigens on the surface of high-risk HPVs-transformed cells may contribute to their high tumorigenic potential, which enables them to escape immune recognition by cytotoxic T lymphocytes. In this study, we show that the viral E7 oncoprotein mediates transcriptional downregulation of the major histocompatibility complex (MHC) class I genes by targeting the class I promoter in HPV16 containing CaSki tumor cells. Using the chromatin immunoprecipitation assay, we demonstrated that HPV16E7 and specific HADCs, including HADC1, HADC2, and HADC8, are physically associated with the class I promoter and the histone of the class I promoter was deacetylated. Knocking down of HPV16E7 expression with the E7-specific small interfering RNA induced the release of HPV17E7 as well as HDAC1 and HDAC2 from the class I promoter. Furthermore, HPV16E7 siRNA resulted in a dramatic increase in histone acetylation. Importantly, MHC class I antigen expression was up-regulated on the surface of cells transfected with the E7 siRNA, but not on that of untransfected cells. Taken together, our results demonstrate that the HPV16E7 protein is associated with the MHC class I promoter and mediates MHC class I downregulation by repressing chromatin activation.
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Affiliation(s)
- Hui Li
- Center for Human Genome Research and College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China.
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Cheung YF, Ou X, Wong SJ. Central and peripheral arterial stiffness in patients after surgical repair of tetralogy of Fallot: implications for aortic root dilatation. Heart 2006; 92:1827-30. [PMID: 16775086 PMCID: PMC1861289 DOI: 10.1136/hrt.2006.091199] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
OBJECTIVES To test the hypotheses that (1) the central conduit arteries stiffen preferentially over the peripheral conduit arteries in patients with repaired tetralogy of Fallot (ToF); and (2) central arterial stiffening is related to aortic root dilatation. DESIGN AND PATIENTS Heart-femoral pulse wave velocity (PWV), femoral-ankle PWV, carotid augmentation index and body surface area-adjusted aortic sinotubular dimension were determined in 31 children after ToF repair and compared with those in 31 age-matched controls after left-to-right shunt repair. In addition, the PWVs and augmentation index were related to the sinotubular junction dimension. SETTINGS Tertiary paediatric cardiac centre. RESULTS Compared with controls, patients had significantly greater heart-femoral PWV (mean 666 (SD 151) v 587 (81) cm/s, p = 0.021) and carotid augmentation index (-14.1 (17.0)% v -25.2 (14.6)%, p = 0.016), whereas the right (888 (202) v 845 (207) cm/s, p = 0.42) and left (918 (227) v 851 (215) cm/s, p = 0.25) femoral-ankle PWVs were similar between the two groups. The sinotubular junction z score of patients was significantly greater than that of controls (4.7 (1.5) v 1.1 (1.4), p < 0.001). Univariate analysis showed that the sinotubular junction z score correlated positively with heart-femoral PWV (r = 0.43, p = 0.001) and carotid augmentation index (r = 0.46, p = 0.001). Multiple linear regression similarly identified heart-femoral PWV (beta = 0.30, p = 0.04) and carotid augmentation index (beta = 0.31, p = 0.04) (model R(2) = 0.26) as significant determinants of sinotubular junction z score. CONCLUSIONS The aorta stiffens in patients with repaired ToF, which may contribute to progressive dilatation of the aortic root in the long term.
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Affiliation(s)
- Y F Cheung
- Division of Paediatric Cardiology, Department of Paediatrics and Adolescent Medicine, Grantham Hospital, The University of Hong Kong, Hong Kong, China.
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Ou X, Tang C, Dai X, Yang J, Hao X, Cao D, Jiang Z, Wang Z, Yi G, Wang Z. Th-P15:3 Effect of liver X receptor agonist on Niemann-Pick C-1 expression and intracellular cholesterol transportation in lipid-loaded THP-1 macrophages. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)81963-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yang J, Tang C, Dai X, Ou X, Wang Z, Jiang Z, Cao D, Hao X, Yi G, Wang Z. Th-P15:229 Apolipoprotein A-I activates ABCA1 gene transcription and protein synthesis. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82188-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Tang C, Dai X, Ou X, Yang J, Cao D, Hao X, Yi G, Wang Z, Liu L, Yang Y. Th-P15:227 Alteration of ATP binding cassette transporter A1 on liver in atherosclerotic minipigs. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82186-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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