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Longhi S, Mercolini F, Carloni L, Nguyen L, Fanolla A, Radetti G. Prematurity and low birth weight lead to altered bone geometry, strength, and quality in children. J Endocrinol Invest 2015; 38:563-8. [PMID: 25540042 DOI: 10.1007/s40618-014-0230-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 12/14/2014] [Indexed: 12/30/2022]
Abstract
PURPOSE Prematurity and low birth weight are associated with a decrease in bone mass. Aim of the study was to investigate bone geometry, strength, and quality in children born at term small for gestational age (term SGA), premature appropriate for gestational age (prem AGA), and premature SGA (prem SGA). METHODS 91 patients (46 f, 45 m), mean age 11.28 years, height SDS 0.03 ± 0.21, and BMI SDS -0.31 ± 0.19. 20 were term SGA, 22 prem SGA, and 49 prem AGA. Bone geometry was assessed on the 2nd metacarpal bone, by evaluating the outer and inner diameter, the cortical area, medullary area, metacarpal index, cross-sectional area, and bone strength. Bone quality was evaluated by ultrasound and expressed as amplitude-dependent speed of sound and bone transmission time (BTT). RESULTS Term SGA, prem SGA, and prem AGA had values of bone geometry, strength, and quality significantly lower than our reference range (p < 0.05). Findings in the three groups were similar, apart from BTT, which was significantly reduced in prem SGA (p < 0.05). Fat percentage was the main determinant of BTT. CONCLUSIONS Children born either prematurely or SGA seem to have smaller and weaker bones. Those born both premature and SGA were the most affected.
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Dorzin E, Nguyen L, Anderson E, Bunn W, Cunningham M. Effect of body mass index on conversion rate and complications among patients undergoing robotic surgery for endometrial cancer. Gynecol Oncol 2015. [DOI: 10.1016/j.ygyno.2015.01.504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bernady A, Nguyen L, Pellet F, Berteaud E, Casteigt J, Nocent-Eijnani C, Falque L, Le Guillou F, Moinard J, Prudhomme A, Ozier A, Roy C, Raherison C. Comorbidités et sévérité de la BPCO des patients issus de la cohorte Palomb. Rev Mal Respir 2015. [DOI: 10.1016/j.rmr.2014.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Pellet F, Berteaud E, Bernady A, Casteigt J, Nocent-Eijnani C, Falque L, Le Guillou F, Nguyen L, Moinard J, Prudhomme A, Ozier A, Roy C, Raherison C. Caractéristiques démographiques et cliniques des patients BPCO de la cohorte Palomb. Rev Mal Respir 2015. [DOI: 10.1016/j.rmr.2014.10.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Richards KK, Hazelton ML, Stevenson MA, Lockhart CY, Pinto J, Nguyen L. Using exceedance probabilities to detect anomalies in routinely recorded animal health data, with particular reference to foot-and-mouth disease in Viet Nam. Spat Spatiotemporal Epidemiol 2014; 11:125-33. [PMID: 25457601 DOI: 10.1016/j.sste.2014.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 07/16/2014] [Accepted: 08/11/2014] [Indexed: 11/25/2022]
Abstract
The widespread availability of computer hardware and software for recording and storing disease event information means that, in theory, we have the necessary information to carry out detailed analyses of factors influencing the spatial distribution of disease in animal populations. However, the reliability of such analyses depends on data quality, with anomalous records having the potential to introduce significant bias and lead to inappropriate decision making. In this paper we promote the use of exceedance probabilities as a tool for detecting anomalies when applying hierarchical spatio-temporal models to animal health data. We illustrate this methodology through a case study data on outbreaks of foot-and-mouth disease (FMD) in Viet Nam for the period 2006-2008. A flexible binomial logistic regression was employed to model the number of FMD infected communes within each province of the country. Standard analyses of the residuals from this model failed to identify problems, but exceedance probabilities identified provinces in which the number of reported FMD outbreaks was unexpectedly low. This finding is interesting given that these provinces are on major cattle movement pathways through Viet Nam.
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Hitka G, Zsom T, Nguyen L, Balla C. Effect of 1-methylcyclopropene on ‘Bosc Kobak’ pears. ACTA ALIMENTARIA 2014. [DOI: 10.1556/aalim.43.2014.suppl.11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Roy S, Taouqi M, Delort J, Marachet A, Costes N, Levy C, Mercadier A, Nguyen L. Inclusion de l’hémovigilance et de la sécurité transfusionnelle dans la politique de qualité et sécurité des soins : l’expérience du Groupe Hospitalier et du site EFS Pitié-Salpêtrière. Transfus Clin Biol 2014. [DOI: 10.1016/j.tracli.2014.08.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zsom T, Zsom-Muha V, Dénes D, Hitka G, Nguyen L, Felföldi J. Non-destructive postharvest quality monitoring of different pear and sweet pepper cultivars. ACTA ALIMENTARIA 2014. [DOI: 10.1556/aalim.43.2014.suppl.28] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Khoja L, Nguyen L, Wang L, Zhang B, Nie J, Yen P, Pnaik M, Powis M, Franke N, Crump M, Hogg D, Joshua A, Ohashie P, Butler M. A Phase Ii Study (Nct01883323) Evaluating the Infusion of Autologous Tumor-Infiltrating Lymphocytes (Til) and Low-Dose Interleukin-2 (Il-2) Therapy Following Non-Myeloablative Lymphodepletion Using Cyclophosphamide and Fludarabine in Patients with Metastatic Melanoma. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu344.44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Shostak K, Patrascu F, Göktuna SI, Close P, Borgs L, Nguyen L, Olivier F, Rammal A, Brinkhaus H, Bentires-Alj M, Marine JC, Chariot A. MDM2 restrains estrogen-mediated AKT activation by promoting TBK1-dependent HPIP degradation. Cell Death Differ 2014; 21:811-24. [PMID: 24488098 DOI: 10.1038/cdd.2014.2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 12/18/2013] [Accepted: 12/23/2013] [Indexed: 12/25/2022] Open
Abstract
Restoration of p53 tumor suppressor function through inhibition of its interaction and/or enzymatic activity of its E3 ligase, MDM2, is a promising therapeutic approach to treat cancer. However, because the MDM2 targetome extends beyond p53, MDM2 inhibition may also cause unwanted activation of oncogenic pathways. Accordingly, we identified the microtubule-associated HPIP, a positive regulator of oncogenic AKT signaling, as a novel MDM2 substrate. MDM2-dependent HPIP degradation occurs in breast cancer cells on its phosphorylation by the estrogen-activated kinase TBK1. Importantly, decreasing Mdm2 gene dosage in mouse mammary epithelial cells potentiates estrogen-dependent AKT activation owing to HPIP stabilization. In addition, we identified HPIP as a novel p53 transcriptional target, and pharmacological inhibition of MDM2 causes p53-dependent increase in HPIP transcription and also prevents HPIP degradation by turning off TBK1 activity. Our data indicate that p53 reactivation through MDM2 inhibition may result in ectopic AKT oncogenic activity by maintaining HPIP protein levels.
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Riley BE, Lougheed JC, Callaway K, Velasquez M, Brecht E, Nguyen L, Shaler T, Walker D, Yang Y, Regnstrom K, Diep L, Zhang Z, Chiou S, Bova M, Artis DR, Yao N, Baker J, Yednock T, Johnston JA. Structure and function of Parkin E3 ubiquitin ligase reveals aspects of RING and HECT ligases. Nat Commun 2013; 4:1982. [PMID: 23770887 PMCID: PMC3709503 DOI: 10.1038/ncomms2982] [Citation(s) in RCA: 251] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 05/03/2013] [Indexed: 01/02/2023] Open
Abstract
Parkin is a RING-between-RING E3 ligase that functions in the covalent attachment of ubiquitin to specific substrates, and mutations in Parkin are linked to Parkinson’s disease, cancer and mycobacterial infection. The RING-between-RING family of E3 ligases are suggested to function with a canonical RING domain and a catalytic cysteine residue usually restricted to HECT E3 ligases, thus termed ‘RING/HECT hybrid’ enzymes. Here we present the 1.58 Å structure of Parkin-R0RBR, revealing the fold architecture for the four RING domains, and several unpredicted interfaces. Examination of the Parkin active site suggests a catalytic network consisting of C431 and H433. In cells, mutation of C431 eliminates Parkin-catalysed degradation of mitochondria, and capture of an ubiquitin oxyester confirms C431 as Parkin’s cellular active site. Our data confirm that Parkin is a RING/HECT hybrid, and provide the first crystal structure of an RING-between-RING E3 ligase at atomic resolution, providing insight into this disease-related protein. The Parkinson’s disease-associated protein Parkin regulates the fate of damaged mitochondria by ubiquitinating mitochondrial substrates. Riley et al. present the crystal structure of the Parkin-R0RBR domain, providing new insight into the catalytic mechanism of the enzyme.
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Nokihara H, Yamamoto N, Nakamichi S, Wakui H, Yamada Y, Nguyen L, Tamura T. A Phase 1 Study of Cabozantinib in Japanese Patients with Advanced Solid Tumors: Anti-Tumor Activity in NSCLC and GIST. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.75] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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Hasler WL, Wilson LA, Parkman HP, Koch KL, Abell TL, Nguyen L, Pasricha PJ, Snape WJ, McCallum RW, Sarosiek I, Farrugia G, Calles J, Lee L, Tonascia J, Unalp-Arida A, Hamilton F. Factors related to abdominal pain in gastroparesis: contrast to patients with predominant nausea and vomiting. Neurogastroenterol Motil 2013; 25:427-38, e300-1. [PMID: 23414452 PMCID: PMC3907086 DOI: 10.1111/nmo.12091] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Accepted: 12/24/2012] [Indexed: 12/12/2022]
Abstract
BACKGROUND Factors associated with abdominal pain in gastroparesis are incompletely evaluated and comparisons of pain vs other symptoms are limited. This study related pain to clinical factors in gastroparesis and contrasted pain/discomfort- with nausea/vomiting-predominant disease. METHODS Clinical and scintigraphy data were compared in 393 patients from seven centers of the NIDDK Gastroparesis Clinical Research Consortium with moderate-severe (Patient Assessment of Upper Gastrointestinal Disorders Symptoms [PAGI-SYM] score ≥ 3) vs none-mild (PAGI-SYM < 3) upper abdominal pain and predominant pain/discomfort vs nausea/vomiting. KEY RESULTS Upper abdominal pain was moderate-severe in 261 (66%). Pain/discomfort was predominant in 81 (21%); nausea/vomiting was predominant in 172 (44%). Moderate-severe pain was more prevalent with idiopathic gastroparesis and with lack of infectious prodrome (P ≤ 0.05) and correlated with scores for nausea/vomiting, bloating, lower abdominal pain/discomfort, bowel disturbances, and opiate and antiemetic use (P < 0.05), but not gastric emptying or diabetic neuropathy or control. Gastroparesis severity, quality of life, and depression and anxiety were worse with moderate-severe pain (P ≤ 0.008). Factors associated with moderate-severe pain were similar in diabetic and idiopathic gastroparesis. Compared to predominant nausea/vomiting, predominant pain/discomfort was associated with impaired quality of life, greater opiate, and less antiemetic use (P < 0.01), but similar severity and gastric retention. CONCLUSIONS & INFERENCES Moderate-severe abdominal pain is prevalent in gastroparesis, impairs quality of life, and is associated with idiopathic etiology, lack of infectious prodrome, and opiate use. Pain is predominant in one fifth of gastroparetics. Predominant pain has at least as great an impact on disease severity and quality of life as predominant nausea/vomiting.
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Scherr RE, Linnell J, Smith M, Nicholson Y, Spezzano T, Bergman J, Brian K, Briggs M, Feenstra G, Hillhouse C, Keen CL, Nguyen L, Ontai L, Schaefer S, Steinberg F, Sutter C, Wright J, Young H, Zidenberg‐Cherr S. The Shaping Healthy Choices Program: A Multi‐Component, School‐Based Approach to Improve Children's Nutrition and Health Behaviors While Supporting Regional Agriculture. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.623.6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Scherr RE, Linnell J, Nicholson Y, Spezzano T, Bergman J, Brian K, Briggs M, Cherr SE, Ermakov I, Feenstra G, Gellermann W, Hillhouse C, Nguyen L, Ontai L, Schaefer S, Smith M, Sutter C, Wright J, Zidenberg‐Cherr S. Assessment of Nutrition and Physical Activity in Children Participating in the Shaping Healthy Choices Program. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.624.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Vutien P, Trinh HN, Nguyen K, Garcia RT, Nguyen HA, Levitt BS, Nguyen L, Ha NB, Ahmed A, Daugherty T, Garcia G, Nguyen MH. Precore and basal core promoter mutations in Asian American patients with hepatitis B e antigen-positive chronic hepatitis B. Aliment Pharmacol Ther 2013; 37:464-72. [PMID: 23278246 DOI: 10.1111/apt.12193] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 10/19/2012] [Accepted: 12/05/2012] [Indexed: 01/04/2023]
Abstract
BACKGROUND Prior studies have shown that precore mutations abolish and basal core promoter (BCP) mutations down-regulate hepatitis B e antigen (HBeAg) production. Thus, the presence of precore and BCP mutations in HBeAg-positive patients indicates an infection with a mixed viral population of wild-type and precore and/or BCP mutant hepatitis B virus (HBV). To date, there has been limited study of the prevalence and clinical significance of precore and BCP mutations in patients with HBeAg-positive chronic hepatitis B. AIM To determine the prevalence, predictors and clinical characteristics of mixed wild-type and precore/BCP HBV infection, through a cross-sectional study, in a US cohort of patients with chronic hepatitis B. METHODS We conducted a retrospective study of 828 chronic hepatitis B patients with HBV genotype and mutation panel testing seen at three US gastroenterology and liver clinics from June 2005 to September 2009. RESULTS A majority of our patients (92.3%) were either Vietnamese or Chinese American. In the HBeAg-positive cohort, 17% of patients had precore mutations only, 28% had BCP mutations only and 5% had both BCP and precore mutations. On multivariate analyses, HBV genotype C, increasing age, lower HBV DNA level and an ALT quotient >2 were independent predictors for the presence of precore and/or BCP mutations. CONCLUSIONS The current distinction and management recommendations for HBeAg-positive vs. HBeAg-negative patients with chronic hepatitis B should be reassessed. Additional biomarkers and treatment endpoints should be studied for their usefulness in predicting continued viral suppression after treatment discontinuation.
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Lang BJ, Nguyen L, Nguyen HC, Vieusseux JL, Chai RCC, Christophi C, Fifis T, Kouspou MM, Price JT. Heat stress induces epithelial plasticity and cell migration independent of heat shock factor 1. Cell Stress Chaperones 2012; 17:765-78. [PMID: 22791010 PMCID: PMC3468677 DOI: 10.1007/s12192-012-0349-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 06/21/2012] [Accepted: 06/22/2012] [Indexed: 02/03/2023] Open
Abstract
Current cancer therapies including cytotoxic chemotherapy, radiation and hyperthermic therapy induce acute proteotoxic stress in tumour cells. A major challenge to cancer therapeutic efficacy is the recurrence of therapy-resistant tumours and how to overcome their emergence. The current study examines the concept that tumour cell exposure to acute proteotoxic stress results in the acquisition of a more advanced and aggressive cancer cell phenotype. Specifically, we determined whether heat stress resulted in an epithelial-to-mesenchymal transition (EMT) and/or the enhancement of cell migration, components of an advanced and therapeutically resistant cancer phenotype. We identified that heat stress enhanced cell migration in both the lung A549, and breast MDA-MB-468 human adenocarcinoma cell lines, with A549 cells also undergoing a partial EMT. Moreover, in an in vivo model of thermally ablated liver metastases of the mouse colorectal MoCR cell line, immunohistological analysis of classical EMT markers demonstrated a shift to a more mesenchymal phenotype in the surviving tumour fraction, further demonstrating that thermal stress can induce epithelial plasticity. To identify a mechanism by which thermal stress modulates epithelial plasticity, we examined whether the major transcriptional regulator of the heat shock response, heat shock factor 1 (HSF1), was a required component. Knockdown of HSF1 in the A549 model did not prevent the associated morphological changes or enhanced migratory profile of heat stressed cells. Therefore, this study provides evidence that heat stress significantly impacts upon cancer cell epithelial plasticity and the migratory phenotype independent of HSF1. These findings further our understanding of novel biological downstream effects of heat stress and their potential independence from the classical heat shock pathway.
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Veal G, Nguyen L, Paci A, Riggi M, Amiel M, Valteau-Couanet D, Brock P, Ladenstein R, Vassal G. Busulfan pharmacokinetics following intravenous and oral dosing regimens in children receiving high-dose myeloablative chemotherapy for high-risk neuroblastoma as part of the HR-NBL-1/SIOPEN trial. Eur J Cancer 2012; 48:3063-72. [DOI: 10.1016/j.ejca.2012.05.020] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 04/30/2012] [Accepted: 05/22/2012] [Indexed: 01/08/2023]
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Nguyen N, Passmore J, Pham C, La Q, Nguyen V, Tran L, Luong A, Nguyen L. Drink driving prevention in Ha Nam and Ninh Binh provinces of Viet Nam. Inj Prev 2012. [DOI: 10.1136/injuryprev-2012-040590r.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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McCollum JT, Williams NJ, Beam SW, Cosgrove S, Ettestad PJ, Ghosh TS, Kimura AC, Nguyen L, Stroika SG, Vogt RL, Watkins AK, Weiss JR, Williams IT, Cronquist AB. Multistate outbreak of Escherichia coli O157:H7 infections associated with in-store sampling of an aged raw-milk Gouda cheese, 2010. J Food Prot 2012; 75:1759-65. [PMID: 23043823 DOI: 10.4315/0362-028x.jfp-12-136] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In 2010, 41 patients ill with Escherichia coli O157:H7 isolates determined to be indistinguishable by pulsed-field gel electrophoresis were identified among residents of five Southwestern U.S. states. A majority of patients reported consuming complimentary samples of aged raw-milk Gouda cheese at national warehouse chain store locations; sampling Gouda cheese was significantly associated with illness (odds ratio, 9.0; 95 % confidence interval, 1.7 to 47). Several Gouda samples yielded the O157:H7 outbreak strain, confirming the food vehicle and source of infections. Implicated retail food-sampling operations were inconsistently regulated among affected states, and sanitation deficiencies were common among sampling venues. Inspection of the cheese manufacturer indicated deficient sanitation practices and insufficient cheese curing times. Policymakers should continue to reexamine the adequacy and enforcement of existing rules intended to ensure the safety of raw-milk cheeses and retail food sampling. Additional research is necessary to clarify the food safety hazards posed to patrons who consume free food samples while shopping.
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Rana R, Borzueh M, Nguyen L, Shapera L. NP028 Wound Care Resource Team: A Pilot Project. Can J Cardiol 2012. [DOI: 10.1016/j.cjca.2012.07.843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Volvert ML, Rogister F, Moonen G, Malgrange B, Nguyen L. MicroRNAs tune cerebral cortical neurogenesis. Cell Death Differ 2012; 19:1573-81. [PMID: 22858543 DOI: 10.1038/cdd.2012.96] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
MicroRNAs (miRNAs) are non-coding RNAs that promote post-transcriptional silencing of genes involved in a wide range of developmental and pathological processes. It is estimated that most protein-coding genes harbor miRNA recognition sequences in their 3' untranslated region and are thus putative targets. While functions of miRNAs have been extensively characterized in various tissues, their multiple contributions to cerebral cortical development are just beginning to be unveiled. This review aims to outline the evidence collected to date demonstrating a role for miRNAs in cerebral corticogenesis with a particular emphasis on pathways that control the birth and maturation of functional excitatory projection neurons.
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Sacheli R, Delacroix L, Vandenackerveken P, Nguyen L, Malgrange B. Gene transfer in inner ear cells: a challenging race. Gene Ther 2012; 20:237-47. [PMID: 22739386 DOI: 10.1038/gt.2012.51] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Recent advances in human genomics led to the identification of numerous defective genes causing deafness, which represent novel putative therapeutic targets. Future gene-based treatment of deafness resulting from genetic or acquired sensorineural hearing loss may include strategies ranging from gene therapy to antisense delivery. For successful development of gene therapies, a minimal requirement involves the engineering of appropriate gene carrier systems. Transfer of exogenous genetic material into the mammalian inner ear using viral or non-viral vectors has been characterized over the last decade. The nature of inner ear cells targeted, as well as the transgene expression level and duration, are highly dependent on the vector type, the route of administration and the strength of the promoter driving expression. This review summarizes and discusses recent advances in inner ear gene-transfer technologies aimed at examining gene function or identifying new treatment for inner ear disorders.
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Ackerman D, Shinto L, Hardy M, Heyman A, Nguyen L, Senders A, Abrams D, Ali A, Enebo B, Homel P, Horowitz R, Reardon M, Torkelson C. P02.08. Patient reported outcomes from complementary, alternative, and integrative medicine (PROCAIM): a feasibility practice network study. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012. [PMCID: PMC3373882 DOI: 10.1186/1472-6882-12-s1-p64] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Grover M, Bernard CE, Pasricha PJ, Lurken MS, Faussone-Pellegrini MS, Smyrk TC, Parkman HP, Abell TL, Snape WJ, Hasler WL, McCallum RW, Nguyen L, Koch KL, Calles J, Lee L, Tonascia J, Ünalp-Arida A, Hamilton FA, Farrugia G. Clinical-histological associations in gastroparesis: results from the Gastroparesis Clinical Research Consortium. Neurogastroenterol Motil 2012; 24:531-9, e249. [PMID: 22339929 PMCID: PMC3353102 DOI: 10.1111/j.1365-2982.2012.01894.x] [Citation(s) in RCA: 133] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Cellular changes associated with diabetic (DG) and idiopathic gastroparesis (IG) have recently been described from patients enrolled in the Gastroparesis Clinical Research Consortium. The association of these cellular changes with gastroparesis symptoms and gastric emptying is unknown. The aim of this study was to relate cellular changes to symptoms and gastric emptying in patients with gastroparesis. METHODS Earlier, using full thickness gastric body biopsies from 20 DG, 20 IG, and 20 matched controls, we found decreased interstitial cells of Cajal (ICC) and enteric nerves and an increase in immune cells in both DG and IG. Here, demographic, symptoms [gastroparesis cardinal symptom index score (GCSI)], and gastric emptying were related to cellular alterations using Pearson's correlation coefficients. KEY RESULTS Interstitial cells of Cajal counts inversely correlated with 4 h gastric retention in DG but not in IG (r = -0.6, P = 0.008, DG, r = 0.2, P = 0.4, IG). There was also a significant correlation between loss of ICC and enteric nerves in DG but not in IG (r = 0.5, P = 0.03 for DG, r = 0.3, P = 0.16, IG). Idiopathic gastroparesis with a myenteric immune infiltrate scored higher on the average GCSI (3.6 ± 0.7 vs 2.7 ± 0.9, P = 0.05) and nausea score (3.8 ± 0.9 vs 2.6 ± 1.0, P = 0.02) as compared to those without an infiltrate. CONCLUSIONS & INFERENCES In DG, loss of ICC is associated with delayed gastric emptying. Interstitial cells of Cajal or enteric nerve loss did not correlate with symptom severity. Overall clinical severity and nausea in IG is associated with a myenteric immune infiltrate. Thus, full thickness gastric biopsies can help define specific cellular abnormalities in gastroparesis, some of which are associated with physiological and clinical characteristics of gastroparesis.
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