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Sanz Cortes M, Corroenne R, Pyarali M, Johnson RM, Whitehead WE, Espinoza J, Donepudi R, Castillo J, Castillo H, Mehollin-Ray AR, Shamshirsaz AA, Nassr AA, Belfort MA. Ambulation after in-utero fetoscopic and open spina bifida repair: predictors for ambulation at 30 months. Ultrasound Obstet Gynecol 2024. [PMID: 38243917 DOI: 10.1002/uog.27589] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/04/2023] [Accepted: 01/15/2024] [Indexed: 01/22/2024]
Abstract
OBJECTIVE Ambulatory outcomes from children who underwent a new minimally invasive fetal spina bifida surgery approach are included in this study for the first time. Identifying cases with better chances of independent ambulation from fetal life can have an important impact on patient counseling. The objectives of this study were: (1) To compare the ambulatory status of a cohort of children who had a prenatal spina bifida repair using two different methods (fetoscopic and open) with a cohort who underwent postnatal repair; and (2) to identify the best predictors for ambulation. METHODS Retrospective review of a cohort of children who had spina bifida repair from 2011-2023 using prenatal fetoscopic surgery (N=73), prenatal open-hysterotomy surgery (N=37) or postnatal repair (N=51) in a single tertiary hospital. Consecutive sample of cases who underwent a spina bifida repair in utero following MoMs trial criteria and cases who underwent postnatal repair, meeting same criteria, also followed up after birth at the same institution. Motor function (MF) assessment by ultrasound was recorded at initial evaluation (MF1), 6 postoperative weeks or equivalent (MF2) and prior to delivery (MF3). Clinical exams to assess MF at birth and at 12 months were recorded. First sacral myotome (S1) MF was classified as "intact MF". Ambulatory status data at each follow-up visit was collected. The proportion of cases who were able to walk independently were compared between fetoscopic and open prenatal surgeries and between prenatal (by fetoscopic or open surgery) and postnatal spina bifida repair. Logistic regression analyses were performed to identify predictors for independent ambulation. RESULTS At 30 months, the proportion of independent ambulators was higher in prenatally vs. postnatally repaired cases (51.8% vs.15.7%; p<0.01). No differences in ambulatory outcomes were seen in the comparison between fetoscopic (52%) vs. open (51.3%; p=0.95) prenatal repair. In the prenatal repair group, having an "intact MF" at 12 months [Odds ratio 7.71 (95%CI: 2.77-21.47), p<0.01] and at birth [4.38 (1.53-12.56), p<0.01], predicted significantly being an independent ambulator by 30 months; the anatomical level of lesion below L2 was also predictive for this outcome [3.68(1.33-9.88), p=0.01]. CONCLUSION Ambulatory status by 30 months can be predicted by observing S1 MF postnatally. Results from this study have implications for parental counseling and planning for supportive therapies. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- M Sanz Cortes
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - R Corroenne
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - M Pyarali
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - R M Johnson
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - W E Whitehead
- Department of Neurosurgery, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - J Espinoza
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - R Donepudi
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - J Castillo
- Department of Pediatrics, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - H Castillo
- Department of Pediatrics, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - A R Mehollin-Ray
- Department of Radiology, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - A A Shamshirsaz
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - A A Nassr
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - M A Belfort
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
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Sanz Cortes M, Johnson RM, Sangi-Haghpeykar H, Bedei I, Greenwood L, Nassr AA, Donepudi R, Whitehead W, Belfort M, Mehollin-Ray AR. Perforation of cavum septi pellucidi in open spina bifida and need for hydrocephalus treatment by 1 year of age. Ultrasound Obstet Gynecol 2024; 63:60-67. [PMID: 37698345 DOI: 10.1002/uog.27480] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 08/12/2023] [Accepted: 08/24/2023] [Indexed: 09/13/2023]
Abstract
OBJECTIVE In-utero repair of an open neural tube defect (ONTD) reduces the risk of developing severe hydrocephalus postnatally. Perforation of the cavum septi pellucidi (CSP) may reflect increased intraventricular pressure in the fetal brain. We sought to evaluate the association of perforated CSP visualized on fetal imaging before and/or after in-utero ONTD repair with the eventual need for hydrocephalus treatment by 1 year of age. METHODS This was a retrospective cohort study of consecutive patients who underwent laparotomy-assisted fetoscopic ONTD repair between 2014 and 2021 at a single center. Eligibility criteria for surgery were based on those of the Management of Myelomeningocele Study (MOMS), although a maternal prepregnancy body mass index of up to 40 kg/m2 was allowed. Fetal brain imaging was performed with ultrasound and magnetic resonance imaging (MRI) at referral and 6 weeks postoperatively. Stored ultrasound and MRI scans were reviewed retrospectively to assess CSP integrity. Medical records were reviewed to determine whether hydrocephalus treatment was needed within 1 year of age. Parametric and non-parametric tests were used as appropriate to compare outcomes between cases with perforated CSP and those with intact CSP as determined on ultrasound at referral. Logistic regression analysis was performed to assess the predictive performance of various imaging markers for the need for hydrocephalus treatment. RESULTS A total of 110 patients were included. Perforated CSP was identified in 20.6% and 22.6% of cases on preoperative ultrasound and MRI, respectively, and in 26.6% and 24.2% on postoperative ultrasound and MRI, respectively. Ventricular size increased between referral and after surgery (median, 11.00 (range, 5.89-21.45) mm vs 16.00 (range, 7.00-43.5) mm; P < 0.01), as did the proportion of cases with severe ventriculomegaly (ventricular width ≥ 15 mm) (12.7% vs 57.8%; P < 0.01). Complete CSP evaluation was achieved on preoperative ultrasound in 107 cases, of which 22 had a perforated CSP and 85 had an intact CSP. The perforated-CSP group presented with larger ventricles (mean, 14.32 ± 3.45 mm vs 10.37 ± 2.37 mm; P < 0.01) and a higher rate of severe ventriculomegaly (40.9% vs 5.9%; P < 0.01) compared to those with an intact CSP. The same trends were observed at 6 weeks postoperatively for mean ventricular size (median, 21.0 (range, 13.0-43.5) mm vs 14.3 (range, 7.0-29.0) mm; P < 0.01) and severe ventriculomegaly (95.0% vs 46.8%; P < 0.01). Cases with a perforated CSP at referral had a lower rate of hindbrain herniation (HBH) reversal postoperatively (65.0% vs 88.6%; P = 0.01) and were more likely to require treatment for hydrocephalus (89.5% vs 22.7%; P < 0.01). The strongest predictor of the need for hydrocephalus treatment within 1 year of age was lack of HBH reversal on MRI (odds ratio (OR), 36.20 (95% CI, 5.96-219.12); P < 0.01) followed by perforated CSP on ultrasound at referral (OR, 23.40 (95% CI, 5.42-100.98); P < 0.01) and by perforated CSP at 6-week postoperative ultrasound (OR, 19.48 (95% CI, 5.68-66.68); P < 0.01). CONCLUSIONS The detection of a perforated CSP in fetuses with ONTD can reliably identify those cases at highest risk for needing hydrocephalus treatment by 1 year of age. Evaluation of this brain structure can improve counseling of families considering fetal surgery for ONTD, in order to set appropriate expectations about postnatal outcome. © 2023 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- M Sanz Cortes
- Department of Obstetrics and Gynecology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
| | - R M Johnson
- Department of Obstetrics and Gynecology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
| | - H Sangi-Haghpeykar
- Department of Obstetrics and Gynecology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
| | - I Bedei
- Department of Obstetrics and Gynecology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
- Department of Prenatal Diagnosis and Fetal Therapy, Justus-Liebig University Gießen, Gießen, Germany
| | - L Greenwood
- Department of Obstetrics and Gynecology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
| | - A A Nassr
- Department of Obstetrics and Gynecology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
| | - R Donepudi
- Department of Obstetrics and Gynecology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
| | - W Whitehead
- Department of Neurosurgery, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
| | - M Belfort
- Department of Obstetrics and Gynecology, Texas Children's Hospital and Baylor College of Medicine, Houston, TX, USA
| | - A R Mehollin-Ray
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, GA, USA
- Edward B. Singleton Department of Radiology, Texas Children's Hospital, Houston, TX, USA
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Zemet R, Krispin E, Johnson RM, Kumar NR, Westerfield LE, Stover S, Mann DG, Castillo J, Castillo HA, Nassr AA, Sanz Cortes M, Donepudi R, Espinoza J, Whitehead WE, Belfort MA, Shamshirsaz AA, Van den Veyver IB. Implication of chromosomal microarray analysis prior to in-utero repair of fetal open neural tube defect. Ultrasound Obstet Gynecol 2023; 61:719-727. [PMID: 36610024 PMCID: PMC10238557 DOI: 10.1002/uog.26152] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/11/2022] [Accepted: 12/13/2022] [Indexed: 06/03/2023]
Abstract
OBJECTIVE In-utero repair of open neural tube defects (ONTD) is an accepted treatment option with demonstrated superior outcome for eligible patients. While current guidelines recommend genetic testing by chromosomal microarray analysis (CMA) when a major congenital anomaly is detected prenatally, the requirement for an in-utero repair, based on the Management of Myelomeningocele Study (MOMS) criteria, is a normal karyotype. In this study, we aimed to evaluate if CMA should be recommended as a prerequisite for in-utero ONTD repair. METHODS This was a retrospective cohort study of pregnancies complicated by ONTD that underwent laparotomy-assisted fetoscopic repair or open-hysterotomy fetal surgery at a single tertiary center between September 2011 and July 2021. All patients met the MOMS eligibility criteria and had a normal karyotype. In a subset of the pregnancies (n = 77), CMA testing was also conducted. We reviewed the CMA results and divided the cohort into two groups according to whether clinically reportable copy-number variants (CNV) were detected (reportable-CNV group) or not (normal-CMA group). Surgical characteristics, complications, and maternal and early neonatal outcomes were compared between the two groups. The primary outcomes were fetal or neonatal death, hydrocephalus, motor function at 12 months of age and walking status at 30 months of age. Standard parametric and non-parametric statistical tests were employed as appropriate. RESULTS During the study period, 146 fetuses with ONTD were eligible for and underwent in-utero repair. CMA results were available for 77 (52.7%) patients. Of those, 65 (84%) had a normal CMA and 12 (16%) had a reportable CNV, two of which were classified as pathogenic. The first case with a pathogenic CNV was diagnosed with a 749-kb central 22q11.21 deletion spanning low-copy-repeat regions B-D of chromosome 22; the second case was diagnosed with a 1.3-Mb interstitial deletion at 1q21.1q21.2. Maternal demographics, clinical characteristics, operative data and postoperative complications were similar between those with normal CMA results and those with reportable CNVs. There were no significant differences in gestational age at delivery or any obstetric and early neonatal outcome between the study groups. Motor function at birth and at 12 months of age, and walking status at 30 months of age, were similar between the two groups. CONCLUSIONS Standard diagnostic testing with CMA should be offered when an ONTD is detected prenatally, as this approach has implications for counseling regarding prognosis and recurrence risk. Our results indicate that the presence of a clinically reportable CNV should not a priori affect eligibility for in-utero repair, as overall pregnancy outcome is similar in these cases to that of cases with normal CMA. Nevertheless, significant CMA results will require a case-by-case multidisciplinary discussion to evaluate eligibility. To generalize the conclusion of this single-center series, a larger, multicenter long-term study should be considered. © 2023 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- R. Zemet
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - E. Krispin
- Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery and Maternal–Fetal Medicine, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
| | - R. M. Johnson
- Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery and Maternal–Fetal Medicine, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
| | - N. R. Kumar
- School of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - L. E. Westerfield
- Department of Obstetrics and Gynecology, Division of Maternal–Fetal Medicine and Reproductive and Prenatal Genetics, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
| | - S. Stover
- Department of Obstetrics and Gynecology, Division of Maternal–Fetal Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - D. G. Mann
- Department of Pediatric Anesthesiology, Perioperative, and Pain Medicine, Clinical Ethics, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, USA
| | - J. Castillo
- Division of Developmental Pediatrics, Department of Pediatrics, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, USA
| | - H. A. Castillo
- Division of Developmental Pediatrics, Department of Pediatrics, Texas Children’s Hospital, Baylor College of Medicine, Houston, TX, USA
| | - A. A. Nassr
- Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery and Maternal–Fetal Medicine, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
| | - M. Sanz Cortes
- Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery and Maternal–Fetal Medicine, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
| | - R. Donepudi
- Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery and Maternal–Fetal Medicine, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
| | - J. Espinoza
- Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery and Maternal–Fetal Medicine, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
| | - W. E. Whitehead
- Department of Neurosurgery, Baylor College of Medicine and Texas Children’s Hospital, Houston, TX, USA
| | - M. A. Belfort
- Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery and Maternal–Fetal Medicine, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
| | - A. A. Shamshirsaz
- Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery and Maternal–Fetal Medicine, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
| | - I. B. Van den Veyver
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Department of Obstetrics and Gynecology, Division of Fetal Therapy and Surgery and Maternal–Fetal Medicine, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
- Department of Obstetrics and Gynecology, Division of Maternal–Fetal Medicine and Reproductive and Prenatal Genetics, Baylor College of Medicine and Texas Children’s Fetal Center, Houston, TX, USA
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Sanz Cortes M, Corroenne R, Sangi-Haghpeykar H, Orman G, Shetty A, Castillo J, Castillo H, Johnson RM, Shamshirsaz A, Belfort MA, Whitehead W, Meoded A. Association between ambulatory skills and diffusion tensor imaging of corpus callosal white matter in infants with spina bifida. Ultrasound Obstet Gynecol 2022; 60:657-665. [PMID: 35638229 DOI: 10.1002/uog.24958] [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] [Received: 11/17/2021] [Revised: 05/03/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
OBJECTIVES To assess brain white matter using diffusion tensor imaging (DTI) at 1 year of age in infants diagnosed with open neural tube defect (ONTD) and explore the association of DTI parameters with ambulatory skills at 30 months of age. METHODS Magnetic resonance imaging (MRI) was performed at an average of 12 months of age and included an echo planar axial DTI sequence with diffusion gradients along 20 non-collinear directions. TORTOISE software was used to correct DTI raw data for motion artifacts, and DtiStudio, DiffeoMap and RoiEditor were used for further postprocessing. DTI data were analyzed in terms of fractional anisotropy (FA), trace, radial diffusivity and axial diffusivity. These parameters reflect the integrity and maturation of white-matter motor pathways. At 30 months of age, ambulation status was evaluated by a developmental pediatrician, and infants were classified as ambulatory if they were able to walk independently with or without orthoses or as non-ambulatory if they could not. Linear mixed-effects method was used to examine the association between study outcomes and study group. Possible confounders were sought, and analyses were adjusted for age at MRI scan and ventricular size by including them in the regression model as covariates. RESULTS Twenty patients with ONTD were included in this study, including three cases that underwent postnatal repair and 17 cases that underwent prenatal repair. There were five ambulatory and 15 non-ambulatory infants evaluated at a mean age of 31.5 ± 5.7 months. MRI was performed at 50.3 (2-132.4) weeks postpartum. When DTI analysis results were compared between ambulatory and non-ambulatory infants, significant differences were observed in the corpus callosum (CC). Compared with non-ambulatory infants, ambulatory infants had increased FA in the splenium (0.62 (0.48-0.75) vs 0.41 (0.34-0.49); P = 0.01, adjusted P = 0.02), genu (0.64 (0.47-0.80) vs 0.47 (0.35-0.61); P = 0.03, adjusted P = 0.004) and body (0.55 (0.45-0.65) vs 0.40 (0.35-0.46), P = 0.01, adjusted P = 0.01). Reduced trace was observed in the CC of ambulatory children at the level of the splenium (0.0027 (0.0018-0.0037) vs 0.0039 (0.0034-0.0044) mm2 /s; P = 0.04, adjusted P = 0.03) and genu (0.0029 (0.0020-0.0038) vs 0.0039 (0.0033-0.0045) mm2 /s; P = 0.04, adjusted P = 0.01). In addition, radial diffusivity was reduced in the CC of the ambulatory children at the level of the splenium (0.00057 (0.00025-0.00089) vs 0.0010 (0.00084-0.00120) mm2 /s; P = 0.02, adjusted P = 0.02) and the genu (0.00058 (0.00028-0.00088) vs 0.0010 (0.00085-0.00118) mm2 /s; P = 0.02, adjusted P = 0.02). There were no differences in axial diffusivity between ambulatory and non-ambulatory children. CONCLUSION This study demonstrates a significant association between white matter integrity of connecting fibers of the corpus callosum, as assessed by DTI, and ambulatory skills at 30 months of age in infants with ONTD. © 2022 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- M Sanz Cortes
- Department of Obstetrics and Gynecology, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - R Corroenne
- Department of Obstetrics and Gynecology, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - H Sangi-Haghpeykar
- Department of Obstetrics and Gynecology, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - G Orman
- Department of Pediatric Radiology, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - A Shetty
- Department of Obstetrics and Gynecology, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - J Castillo
- Department of Pediatrics, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - H Castillo
- Department of Pediatrics, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - R M Johnson
- Department of Obstetrics and Gynecology, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - A Shamshirsaz
- Department of Obstetrics and Gynecology, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - M A Belfort
- Department of Obstetrics and Gynecology, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - W Whitehead
- Department of Neurosurgery, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
| | - A Meoded
- Department of Pediatric Radiology, Texas Children's Hospital & Baylor College of Medicine, Houston, TX, USA
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Wilson BE, White WH, Richard RT, Johnson RM. Population Trends of the Sugarcane Borer (Lepidoptera: Crambidae) in Louisiana Sugarcane. Environ Entomol 2020; 49:1455-1461. [PMID: 33128561 DOI: 10.1093/ee/nvaa127] [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] [Received: 08/04/2020] [Indexed: 06/11/2023]
Abstract
The sugarcane borer, Diatraea saccharalis (F.) (Lepidoptera: Crambidae), is the primary pest of sugarcane, Saccharum spp., in Louisiana. Spring populations are not considered economically damaging, but quantifying infestations can provide an indication of the spatial and temporal character of the damaging summer populations. Statewide surveys quantified the density of sugarcane tillers killed by D. saccharalis (deadhearts) from sugarcane fields across the state in spring from 2003 to 2020. Deadheart density varied greatly among years with a high of 1,318/ha in 2003 to a low of 0/ha in 2018. Linear regressions of the 3-yr rolling average showed declines in spring D. saccharalis populations and the percentage of acreage treated with insecticides over 17 yr. Weather factors including minimum winter temperatures and average spring temperatures were poor predictors of D. saccharalis populations. Only total precipitation in the month of April was positively correlated with numbers of deadhearts per hectare. Results suggest overwintering mortality is not a key factor influencing populations of the first generation of D. saccharalis in Louisiana. Total precipitation in the month of July was positively associated with percentage of treated acreage. Spring deadheart density was directly related to percentage of acreage treated with insecticides during the summer. Quantifying first-generation D. saccharalis populations by recording deadheart density can aid in predicting pest pressure later in the growing season.
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Affiliation(s)
- B E Wilson
- Louisiana State University Agricultural Center, Sugarcane Research Station, St. Gabriel, LA
| | - W H White
- USDA, ARS Sugarcane Research Laboratory, Houma, LA
| | - R T Richard
- USDA, ARS Sugarcane Research Laboratory, Houma, LA
| | - R M Johnson
- USDA, ARS Sugarcane Research Laboratory, Houma, LA
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Corroenne R, Yepez M, Pyarali M, Johnson RM, Whitehead WE, Castillo HA, Castillo J, Mehollin-Ray AR, Espinoza J, Shamshirsaz AA, Nassr AA, Belfort MA, Cortes MS. Prenatal predictors of motor function in children with open spina bifida: a retrospective cohort study. BJOG 2020; 128:384-391. [PMID: 32975898 DOI: 10.1111/1471-0528.16538] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2020] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To identify predictors for intact motor function (MF) at birth and at 12 months of life in babies with prenatally versus postnatally repaired open spina bifida (OSB). DESIGN Retrospective cohort study. SETTING Texas Children's Hospital, 2011-2018. POPULATION Patients who underwent either prenatal or postnatal OSB repair. METHODS Prenatal MF of the lower extremities was evaluated by ultrasound following a metameric distribution at the time of diagnosis (US1), 6 weeks postoperatively (or 6 weeks after initial evaluation in postnatally repaired cases) (US2) and at the last ultrasound before delivery (US3). At birth and at 12 months, MF was assessed clinically. Intact MF (S1) was defined as the observation of plantar flexion of the ankle. Results from logistic regression analysis are expressed as odds ratios (95% confidence intervals, P values). RESULTS A total of 127 patients were included: 93 with prenatal repair (51 fetoscopic; 42 open hysterotomy repair) and 34 with postnatal repair. In the prenatal repair group, predictors for intact MF at birth and at 12 months included: absence of clubfeet (OR 11.3, 95% CI 3.2-39.1, P < 0.01; OR 10.8 95% CI 2.4-47.6, P < 0.01); intact MF at US1 (OR 19.7, 95% CI 5.0-76.9, P < 0.01; OR 8.7, 95% CI 2.0-38.7, P < 0.01); intact MF at US2 (OR 22, 95% CI 6.5-74.2, P < 0.01; OR 13.5, 95% 3.0-61.4, P < 0.01); intact MF at US3 (OR 13.7, 95% CI 3.4-55.9, P < 0.01; OR 12.6, 95% CI 2.5-64.3, P < 0.01); and having a flat lesion (OR 11.2, 95% CI 2.4-51.1, P < 0.01; OR 4.1, 95% CI 1.1-16.5, P = 0.04). In the postnatal repair group, the only predictor of intact MF at 12 months was having intact MF at birth (OR 15.2, 95% CI 2.0-113.3, P = 0.03). CONCLUSIONS The detection of intact MF in utero from mid-gestation to delivery predicts intact MF at birth and at 12 months in babies who undergo prenatal OSB repair. TWEETABLE ABSTRACT Detection of intact motor function in utero predicts intact motor function at birth and at 1 year in fetuses who undergo prenatal OSB repair.
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Affiliation(s)
- R Corroenne
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - M Yepez
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - M Pyarali
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - R M Johnson
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - W E Whitehead
- Department of Neurosurgery, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - H A Castillo
- Department of Pediatrics, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - J Castillo
- Department of Pediatrics, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - A R Mehollin-Ray
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA.,Department of Radiology, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - J Espinoza
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - A A Shamshirsaz
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - A A Nassr
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - M A Belfort
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
| | - M S Cortes
- Department of Obstetrics & Gynecology, Division of Maternal-Fetal Medicine, Baylor College of Medicine & Texas Children's Hospital, Houston, TX, USA
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7
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Wilson BE, Beuzelin JM, Richard RT, Johnson RM, Gravois KA, White WH. West Indian Canefly (Hemiptera: Delphacidae): An Emerging Pest of Louisiana Sugarcane. J Econ Entomol 2020; 113:263-272. [PMID: 31751463 DOI: 10.1093/jee/toz284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Indexed: 06/10/2023]
Abstract
The West Indian canefly, Saccharosydne saccharivora (Westwood) (Hemiptera: Delphacidae), is a sporadic pest of sugarcane in Louisiana which has recently emerged as a more consistent threat with outbreaks occurring in 2012, 2016, 2017, and 2019. Surveys of commercial fields in 2016 revealed that S. saccharivora infestations were present throughout Louisiana sugarcane and populations peaked in mid-June before declining. High minimum winter temperatures are generally associated with S. saccharivora outbreaks. Six insecticide evaluations demonstrated effective control with several insecticides including λ-cyhalothrin, flupyradifurone, acetamiprid, and imidacloprid. In five of the six insecticide trials, S. saccharivora infestations had substantially declined by 21 d after treatment. Effects of insecticidal control of S. saccharivora on sugar yields were detected in one of four small plot trials in which yield data were collected. Linear regression revealed S. saccharivora cumulative insect days in a grid sampling study were inversely associated with sugar yields. Results from these collective experiments suggest impacts on sugar yields are influenced by pest density and infestation duration. Differences were detected in numbers of S. saccharivora nymphs and adults as well as sooty mold coverage among commercial sugarcane cultivars with more than twofold increases in the most susceptible compared to resistant cultivars. The research presented herein documents the impact of S. saccharivora to Louisiana sugarcane and provides important ground work for developing effective pest management strategies. Future research efforts should aim to identify ecological factors influencing population dynamics, varietal preferences, and economic thresholds.
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Affiliation(s)
- B E Wilson
- Louisiana State University Agricultural Center, Sugarcane Research Station, St. Gabriel, LA
| | - J M Beuzelin
- Institute of Food and Agricultural Sciences, Everglades Research and Education Center, University of Florida, Belle Glade, FL
| | - R T Richard
- USDA, ARS Sugarcane Research Laboratory, Houma, LA
| | - R M Johnson
- USDA, ARS Sugarcane Research Laboratory, Houma, LA
| | - K A Gravois
- Louisiana State University Agricultural Center, Sugarcane Research Station, St. Gabriel, LA
| | - W H White
- USDA, ARS Sugarcane Research Laboratory, Houma, LA
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8
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Yuan Y, Yost SE, Chang CW, Yoh KE, Johnson RM, Schmolze D, Liang J, Hutchinson KE. Abstract PD5-07: Comprehensive profiling of poor-risk paired primary and recurrent triple-negative breast cancers reveals immune phenotype shifts. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-pd5-07] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Prognosis for triple-negative breast cancer (TNBC) patients remains poor, due in part to the lack of effective targeted therapies in the advanced setting. Emerging clinical data indicates reduced efficacy of immune checkpoint inhibitors in heavily pre-treated TNBC, but the underlying mechanisms are poorly understood. To better understand the immune phenotypic evolution of paired TNBCs, we studied the genomic and transcriptomic profiles of tumors from patients undergoing treatment for TNBC.
Methods: We analyzed primary and recurrent TNBCs from 55 poor-risk patients, including 44 paired primary-metastatic samples and 11 paired metastatic tumors. FoundationOne® and RNAseq was successful on 89 specimens and 97 specimens, respectively. In addition to somatic alterations, FoundationOne® provided tumor mutational burden (TMB). From RNAseq, we ascertained the TNBC molecular subtypes, and the mRNA expression of immune-related genes. Stromal tumor-infiltrating lymphocytes (stromal TILs), recurrence-free survival, and overall survival were also studied.
Results: From FoundationOne® sequencing, a mutational landscape typical of TNBCs was observed across both primary and recurrent disease specimens, with TP53 mutated in 82.0% of specimens, and BRCA1 and BRCA2 mutated in 4.5% and 16.9% of specimens, respectively. Sample profiles revealed minimal shifts in copy number alterations and TMB over time, however, notable TNBC subtype shifts were observed between primary and recurrent tumors. These included an increase in the Lehmann/Pietenpol-defined basal-like 1 phenotype (BL1, 12.8% to 20.9%), an increase in the mesenchymal phenotype (M, 12.8% to 20.9%), and a significant decrease in the immunomodulatory phenotype (IM, 27.1% to 2.3%). Similarly, tumors exhibited a downward shift in gene expression delineating the Burstein-defined basal-like immune-activated phenotype (BLIA, 37.0% to 14.3%). Composite expression of immunomodulatory gene signatures representative of Th1/Th2 responses, IFNg-related inflammation, M1/M2 macrophage activation and suppression, etc., was decreased in the recurrent tumors compared to the primaries (p = 0.01), and histopathology-derived percent stromal TILs were significantly decreased in the recurrent TNBCs (p = 0.02). However, higher stromal TILs (≥30%) were not associated with improved overall survival when measured in primary specimens (p = 0.15), or with the time from relapse to death when measured in recurrent specimens (p = 0.65) in this cohort of immunotherapy-naïve patients.
Conclusion: In this retrospective study of paired TNBCs, significant transcriptomic phenotype shifts were observed as patients progressed, while only minor genomic shifts were seen. Selective immune profiling showed significantly reduced TILs and immune-activating gene expression signatures in recurrent TNBCs, which may explain the lack of efficacy of immunotherapeutic agents in heavily pretreated TNBCs. Further studies are ongoing to understand the proteomic landscape shifts in TNBCs over time and to identify novel targeted agents appropriate for recurrent disease.
Citation Format: Yuan Y, Yost SE, Chang C-W, Yoh KE, Johnson RM, Schmolze D, Liang J, Hutchinson KE. Comprehensive profiling of poor-risk paired primary and recurrent triple-negative breast cancers reveals immune phenotype shifts [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr PD5-07.
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Affiliation(s)
- Y Yuan
- City of Hope National Medical Center, Duarte, CA; Genentech, South San Francisco, CA
| | - SE Yost
- City of Hope National Medical Center, Duarte, CA; Genentech, South San Francisco, CA
| | - C-W Chang
- City of Hope National Medical Center, Duarte, CA; Genentech, South San Francisco, CA
| | - KE Yoh
- City of Hope National Medical Center, Duarte, CA; Genentech, South San Francisco, CA
| | - RM Johnson
- City of Hope National Medical Center, Duarte, CA; Genentech, South San Francisco, CA
| | - D Schmolze
- City of Hope National Medical Center, Duarte, CA; Genentech, South San Francisco, CA
| | - J Liang
- City of Hope National Medical Center, Duarte, CA; Genentech, South San Francisco, CA
| | - KE Hutchinson
- City of Hope National Medical Center, Duarte, CA; Genentech, South San Francisco, CA
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9
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Poffenberger MC, Metcalfe-Roach A, Aguilar E, Chen J, Hsu BE, Wong AH, Johnson RM, Flynn B, Samborska B, Ma EH, Gravel SP, Tonelli L, Devorkin L, Kim P, Hall A, Izreig S, Loginicheva E, Beauchemin N, Siegel PM, Artyomov MN, Lum JJ, Zogopoulos G, Blagih J, Jones RG. LKB1 deficiency in T cells promotes the development of gastrointestinal polyposis. Science 2018; 361:406-411. [PMID: 30049881 DOI: 10.1126/science.aan3975] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 02/06/2018] [Accepted: 06/14/2018] [Indexed: 12/16/2022]
Abstract
Germline mutations in STK11, which encodes the tumor suppressor liver kinase B1 (LKB1), promote Peutz-Jeghers syndrome (PJS), a cancer predisposition syndrome characterized by the development of gastrointestinal (GI) polyps. Here, we report that heterozygous deletion of Stk11 in T cells (LThet mice) is sufficient to promote GI polyposis. Polyps from LThet mice, Stk11+/- mice, and human PJS patients display hallmarks of chronic inflammation, marked by inflammatory immune-cell infiltration, signal transducer and activator of transcription 3 (STAT3) activation, and increased expression of inflammatory factors associated with cancer progression [interleukin 6 (IL-6), IL-11, and CXCL2]. Targeting either T cells, IL-6, or STAT3 signaling reduced polyp growth in Stk11+/- animals. Our results identify LKB1-mediated inflammation as a tissue-extrinsic regulator of intestinal polyposis in PJS, suggesting possible therapeutic approaches by targeting deregulated inflammation in this disease.
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Affiliation(s)
- M C Poffenberger
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - A Metcalfe-Roach
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada
| | - E Aguilar
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - J Chen
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - B E Hsu
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Medicine, McGill University, Montreal, Quebec H3G 2M1, Canada
| | - A H Wong
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - R M Johnson
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Genentech, 1 DNA Way South, San Francisco, CA 94080, USA
| | - B Flynn
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - B Samborska
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada
| | - E H Ma
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - S-P Gravel
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Faculty of Pharmacy, University of Montreal, Montreal, Quebec H3C 3J7, Canada
| | - L Tonelli
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada
| | - L Devorkin
- Trev and Joyce Deeley Research Centre, BC Cancer Agency, Victoria, British Columbia V8R 6V5, Canada
| | - P Kim
- Trev and Joyce Deeley Research Centre, BC Cancer Agency, Victoria, British Columbia V8R 6V5, Canada
| | - A Hall
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Research Institute of the McGill University Health Centre, Montreal, Quebec H3H 2R9, Canada
| | - S Izreig
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - E Loginicheva
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - N Beauchemin
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Biochemistry, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - P M Siegel
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Medicine, McGill University, Montreal, Quebec H3G 2M1, Canada
| | - M N Artyomov
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.,Center for Human Immunology and Immunotherapy Programs, Washington University at St. Louis, St. Louis, MO 63110, USA
| | - J J Lum
- Trev and Joyce Deeley Research Centre, BC Cancer Agency, Victoria, British Columbia V8R 6V5, Canada.,Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 2Y2, Canada
| | - G Zogopoulos
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Research Institute of the McGill University Health Centre, Montreal, Quebec H3H 2R9, Canada
| | - J Blagih
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada.,Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada
| | - R G Jones
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3A 1A3, Canada. .,Department of Physiology, McGill University, Montreal, Quebec H3G 1Y6, Canada.,Center for Cancer and Cell Biology, Van Andel Research Institute, Grand Rapids, MI 49503, USA
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10
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Perry TL, Kranker LM, Curry EE, Johnson RM, Mobley-Smith E. 353 Improving Outcomes in Fournier’s Gangrene Using Skin and Soft Tissue Sparing Flap Preservation Surgery: An Alternative Approach to Wide Radical Debridement. J Burn Care Res 2018. [DOI: 10.1093/jbcr/iry006.275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- T L Perry
- Wright State University, Dayton, OH; Wright State University Boonshoft SOM, Miami Valley Hospital, Dayton, OH
| | - L M Kranker
- Wright State University, Dayton, OH; Wright State University Boonshoft SOM, Miami Valley Hospital, Dayton, OH
| | - E E Curry
- Wright State University, Dayton, OH; Wright State University Boonshoft SOM, Miami Valley Hospital, Dayton, OH
| | - R M Johnson
- Wright State University, Dayton, OH; Wright State University Boonshoft SOM, Miami Valley Hospital, Dayton, OH
| | - E Mobley-Smith
- Wright State University, Dayton, OH; Wright State University Boonshoft SOM, Miami Valley Hospital, Dayton, OH
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11
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Gruosso T, Gigoux M, Bertos N, Manem VS, Zuo D, Saleg SM, Souleimanova M, Zhao H, Johnson RM, Monette A, Muñoz Ramos V, Hallett MT, Stagg J, Lapointe R, Omeroglu A, Meterissian S, Buisseret L, Van den Eyden G, Salgado R, Guiot MC, Haibe-Kains B, Park M. Abstract PD6-05: Distinct tumor microenvironments stratify triple negative breast cancer into immune subtypes. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-pd6-05] [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: 11/16/2022]
Abstract
Abstract
Background:
Triple negative breast cancer (TNBC) are especially difficult to treat effectively. While only 20-30% of TNBC patients respond to chemotherapy in the neoadjuvant setting, overall outcome remains poor for non-responding patients. Engaging the immune system promises optimal personalized cancer therapy as mounting evidence suggests that immune-checkpoint inhibitor immunotherapies may become a therapeutic option for TNBC patients. The presence of CD8+ T cells, a crucial component of the cytotoxic arm of the adaptive immune response, is associated with good clinical outcome in TNBC patients. Specifically, it is the efficient CD8+ T cell invasion and infiltration in the tumor that is associated with good outcome. On the other hand, some tumors accumulate CD8+ T cells in the tumor-associated stroma with poor infiltration in the tumor epithelium. These patients show poor outcome. As CD8+ T cell infiltration in the tumor is a crucial step to mount an efficient anti-tumor response, we thus wondered how the tumor microenvironment affects CD8+ T cell invasion into the tumor epithelial compartment of the TNBC tumors.
Methods:
To identify potential stroma-dependent mechanisms that potentiate or inhibit CD8+ T cells invasion into the tumor epithelium, we coupled analysis of spatial patterns of CD8+ T cell localization by Immunohistochemistry (IHC) andperformed gene expression profiling of laser-capture microdissected tumor-associated stroma (as well as matched epithelium and bulk tumor) from 38 TNBC chemotherapy-naive primary cases. GSEA-based Metasignatures were derived from bulk tumor gene expression data from our cohort. To investigate the compartment of origin of the pathways identified via the Metasignatures, the (LCM)-derived tumor stromal and epithelial gene expression were analyzed.
Results:
CD8+ T cell quantification in different compartments of the tumor identify 3 main subgroups of TNBC based on CD8+ T cell localization. Importantly we developed a 2-step classification scheme based on CD8+ T cell localization. We developed metasignatures following our 2 steps classification and identified key bulk tumor metasignatures that showed prognostic value in an independent cohort. In addition the matched LCM gene expression from the tumor epithelium and stromal compartments allowed us to identify the compartment of origin.
Importantly, while 1 group of TNBC tumor was showing a significant anti-tumor response, the 2 other groups showed absence of such environment. The 2 non inflamed immune subtypes showed distinct phenotypes and biologies associated with poor anti-tumor response that we validated by immunohistochemistry and fluorescence. These results highlight different potential mecanisms that lead to immune evasion and allow us to stratify TNBC into immune subgroups.
Citation Format: Gruosso T, Gigoux M, Bertos N, Manem VS, Zuo D, Saleg SM, Souleimanova M, Zhao H, Johnson RM, Monette A, Muñoz Ramos V, Hallett MT, Stagg J, Lapointe R, Omeroglu A, Meterissian S, Buisseret L, Van den Eyden G, Salgado R, Guiot M-C, Haibe-Kains B, Park M. Distinct tumor microenvironments stratify triple negative breast cancer into immune subtypes [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr PD6-05.
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Affiliation(s)
- T Gruosso
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - M Gigoux
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - N Bertos
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - VS Manem
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - D Zuo
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - SM Saleg
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - M Souleimanova
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - H Zhao
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - RM Johnson
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - A Monette
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - V Muñoz Ramos
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - MT Hallett
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - J Stagg
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - R Lapointe
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - A Omeroglu
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - S Meterissian
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - L Buisseret
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - G Van den Eyden
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - R Salgado
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - M-C Guiot
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - B Haibe-Kains
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - M Park
- Goodman Cancer Research Center, McGill University, Montreal, Canada; Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada; 7Centre de Recherche du Centre Hospitalier de l'Université de Montréal et Institut du Cancer de Montréal, Montreal, Canada; McGill University Health Centre and McGill University, Montreal, Canada; Breast Cancer Translational Research Laboratory, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
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12
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Rawson S, McPhillie MJ, Johnson RM, Fishwick CWG, Muench SP. The potential use of single-particle electron microscopy as a tool for structure-based inhibitor design. Acta Crystallogr D Struct Biol 2017; 73:534-540. [PMID: 28580915 PMCID: PMC5458495 DOI: 10.1107/s2059798317004077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 03/13/2017] [Indexed: 12/14/2022] Open
Abstract
Recent developments in electron microscopy (EM) have led to a step change in our ability to solve the structures of previously intractable systems, especially membrane proteins and large protein complexes. This has provided new opportunities in the field of structure-based drug design, with a number of high-profile publications resolving the binding sites of small molecules and peptide inhibitors. There are a number of advantages of EM over the more traditional X-ray crystallographic approach, such as resolving different conformational states and permitting the dynamics of a system to be better resolved when not constrained by a crystal lattice. There are still significant challenges to be overcome using an EM approach, not least the speed of structure determination, difficulties with low-occupancy ligands and the modest resolution that is available. However, with the anticipated developments in the field of EM, the potential of EM to become a key tool for structure-based drug design, often complementing X-ray and NMR studies, seems promising.
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Affiliation(s)
- S. Rawson
- School of Biomedical Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, England
| | - M. J. McPhillie
- School of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, England
| | - R. M. Johnson
- School of Biomedical Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, England
- School of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, England
| | - C. W. G. Fishwick
- School of Chemistry and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, England
| | - S. P. Muench
- School of Biomedical Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, England
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Affiliation(s)
- R M Johnson
- Professor of Public Health, Department of Health Sciences, University of Alaska Anchorage, United States.
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Johnson RM. Humanitarian Aspects of Nutrition for an Expanding World Population. World Rev Nutr Diet 2015. [DOI: 10.1159/000387539] [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: 11/19/2022]
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Abstract
Foraging honey bees (Apis mellifera L.) can routinely travel as far as several kilometers from their hive in the process of collecting nectar and pollen from floral patches within the surrounding landscape. Since the availability of floral resources at the landscape scale is a function of landscape composition, apiculturists have long recognized that landscape composition is a critical determinant of honey bee colony success. Nevertheless, very few studies present quantitative data relating colony success metrics to local landscape composition. We employed a beekeeper survey in conjunction with GIS-based landscape analysis to model colony success as a function of landscape composition in the State of Ohio, USA, a region characterized by intensive cropland, urban development, deciduous forest, and grassland. We found that colony food accumulation and wax production were positively related to cropland and negatively related to forest and grassland, a pattern that may be driven by the abundance of dandelion and clovers in agricultural areas compared to forest or mature grassland. Colony food accumulation was also negatively correlated with urban land cover in sites dominated by urban and agricultural land use, which does not support the popular opinion that the urban environment is more favorable to honey bees than cropland.
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Affiliation(s)
- D B Sponsler
- Department of Entomology, The Ohio State University , Wooster, OH , USA
| | - R M Johnson
- Department of Entomology, The Ohio State University , Wooster, OH , USA
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Johnson RM. S12.4 Chlamydia Trachomatis. Br J Vener Dis 2013. [DOI: 10.1136/sextrans-2013-051184.0060] [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: 11/03/2022]
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Salah JE, Johnson RM, Tepley CA. Coordinated incoherent scatter radar observations of the semidiurnal tide in the lower thermosphere. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/90ja01529] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Fuller-Rowell TJ, Rees D, Parish HF, Virdi TS, Williams PJS, Johnson RM. Lower Thermosphere Coupling Study: Comparison of observations with predictions of the University College London-Sheffield Thermosphere-Ionosphere Model. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/90ja02315] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
Numerical taxonomy was done on 208 strains of marine bacteria. The collection was segregated into eight groups, seven of which contained Vibrio sp. Nucleic acid base ratio studies on a typical Vibrio sp. from each group and other genera were done. The phenotypically different Vibrio sp. had a narrow range of base ratios. The other genera had base ratios more similar to the base ratios reported for their genus than to each other as marine bacteria. The taxonomic groups are compared with generic classification and the strains' sources of isolations.
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Affiliation(s)
- R M Johnson
- Botany Department, Arizona State University, Tempe, Arizona USA
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Oakeshott JG, Johnson RM, Berenbaum MR, Ranson H, Cristino AS, Claudianos C. Metabolic enzymes associated with xenobiotic and chemosensory responses in Nasonia vitripennis. Insect Mol Biol 2010; 19 Suppl 1:147-163. [PMID: 20167025 DOI: 10.1111/j.1365-2583.2009.00961.x] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The numbers of glutathione S-transferase, cytochrome P450 and esterase genes in the genome of the hymenopteran parasitoid Nasonia vitripennis are about twice those found in the genome of another hymenopteran, the honeybee Apis mellifera. Some of the difference is associated with clades of these families implicated in xenobiotic resistance in other insects and some is in clades implicated in hormone and pheromone metabolism. The data support the hypothesis that the eusocial behaviour of the honeybee and the concomitant homeostasis of the nest environment may obviate the need for as many gene/enzyme systems associated with xenobiotic metabolism as are found in other species, including N. vitripennis, that are thought to encounter a wider range of potentially toxic xenobiotics in their diet and habitat.
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Affiliation(s)
- J G Oakeshott
- Commonwealth Scientific and Industrial Research Organisation Entomology, Acton, ACT, Australia.
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Rhoads RP, Johnson RM, Rathbone CR, Liu X, Temm-Grove C, Sheehan SM, Hoying JB, Allen RE. Satellite cell-mediated angiogenesis in vitro coincides with a functional hypoxia-inducible factor pathway. Am J Physiol Cell Physiol 2009; 296:C1321-8. [PMID: 19386789 DOI: 10.1152/ajpcell.00391.2008] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Muscle regeneration involves the coordination of myogenesis and revascularization to restore proper muscle function. Myogenesis is driven by resident stem cells termed satellite cells (SC), whereas angiogenesis arises from endothelial cells and perivascular cells of preexisting vascular segments and the collateral vasculature. Communication between myogenic and angiogenic cells seems plausible, especially given the number of growth factors produced by SC. To characterize these interactions, we developed an in vitro coculture model composed of rat skeletal muscle SC and microvascular fragments (MVF). In this system, isolated epididymal MVF suspended in collagen gel are cultured over a rat SC monolayer culture. In the presence of SC, MVF exhibit greater indices of angiogenesis than MVF cultured alone. A positive dose-dependent effect of SC conditioned medium (CM) on MVF growth was observed, suggesting that SC secrete soluble-acting growth factor(s). Next, we specifically blocked VEGF action in SC CM, and this was sufficient to abolish satellite cell-induced angiogenesis. Finally, hypoxia-inducible factor-1alpha (HIF-1alpha), a transcriptional regulator of VEGF gene expression, was found to be expressed in cultured SC and in putative SC in sections of in vivo stretch-injured rat muscle. Hypoxic culture conditions increased SC HIF-1alpha activity, which was positively associated with SC VEGF gene expression and protein levels. Collectively, these initial observations suggest that a heretofore unexplored aspect of satellite cell physiology is the initiation of a proangiogenic program.
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Affiliation(s)
- R P Rhoads
- Muscle Biology Group, Department of Animal Sciences, University of Arizona, Tucson, AZ 85721, USA
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Meltzer TH, Livingston RC, Madsen RE, Jornitz MW, Johnson RM, Mittelman MW. Reverse osmosis as a means of water for injection production: a response to the position of the European Medicines Agency. PDA J Pharm Sci Technol 2009; 63:1-7. [PMID: 19455937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- T H Meltzer
- Capitola Consultancy, 8103 Hampden Lane, Bethesda, MD 20814, USA.
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Johnson RM, Runyan CW, Coyne-Beasley T, Lewis MA, Bowling JM. Storage of household firearms: an examination of the attitudes and beliefs of married women with children. Health Educ Res 2008; 23:592-602. [PMID: 17890758 PMCID: PMC2733798 DOI: 10.1093/her/cym049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2006] [Accepted: 07/09/2007] [Indexed: 05/17/2023]
Abstract
Although safe firearm storage is a promising injury prevention strategy, many parents do not keep their firearms unloaded and locked up. Using the theory of planned behavior as a guiding conceptual framework, this study examines factors associated with safe storage among married women with children and who have firearms in their homes. Data come from a national telephone survey (n=185). We examined beliefs about defensive firearm use, subjective norms, perceived behavioral control and firearm storage practices. A Wilcoxon-Mann-Whitney test was conducted to assess associations between psychosocial factors and firearm storage practices. Women were highly motivated to keep firearms stored safely. Those reporting safe storage practices had more favorable attitudes, more supportive subjective norms and higher perceptions of behavioral control than those without safe storage. One-fourth believed a firearm would prevent a family member from being hurt in case of a break-in, 58% believed a firearm could scare off a burglar. Some 63% said they leave decisions about firearm storage to their husbands. Women were highly motivated to store firearms safely as evidenced by favorable attitudes, supportive subjective norms and high perceptions of behavioral control. This was especially true for those reporting safer storage practices.
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Affiliation(s)
- R M Johnson
- Harvard Injury Control Research Center, Harvard School of Public Health, Boston, MA 02115, USA.
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Johnson RM, Ristig MB, Overton ET, Lisker-Melman M, Cummings OW, Aberg JA. Safety and tolerability of sequential pegylated IFN-alpha2a and tenofovir for hepatitis B infection in HIV(+) individuals. HIV Clin Trials 2007; 8:173-81. [PMID: 17621464 DOI: 10.1310/hct0803-173] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Chronic hepatitis B virus infections are a major cause of morbidity and mortality in HIV co-infected patients. The standard of care for treating HCV co-infection has been guided by major clinical trials, but the treatment of HBV co-infection has not been as thoroughly studied and the standard of care remains largely untested. The single pill formulation of tenofovir with emtricitabine has become a standard treatment approach in HBV co-infected patients. WU114 was a phase 1 clinical trial that examined the safety and tolerability of sequential treatment of HBV with pegylated interferon-alpha2a plus delayed-initiation tenofovir in HIV co-infected individuals. We postulated that initial HBV viral load reduction with pegylated interferon prior to initiation of nucleoside/nucleotide therapy would increase seroconversion events and durability of HBV virologic suppression. No severe pegylated IFN-alpha2a drug toxicities were seen in either the monotherapy or delayed tenofovir arms. Sequential pegylated interferon and tenofovir-based therapy was tolerable and should be compared with dual nucleoside/nucleotide suppression to determine relative frequencies of seroconversion and durability of HBV suppression in co-infected patients.
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Affiliation(s)
- R M Johnson
- Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.
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Johnson RM, Shrimpton JM, Cho GK, Heath DD. Dosage effects on heritability and maternal effects in diploid and triploid Chinook salmon (Oncorhynchus tshawytscha). Heredity (Edinb) 2007; 98:303-10. [PMID: 17301740 DOI: 10.1038/sj.hdy.6800941] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Induced triploidy (3N) in salmon results from a blockage of maternal meiosis II, and hence provides a unique opportunity to study dosage effects on phenotypic variance. Chinook salmon families were bred using a paternal half-sib breeding design (62 females and 31 males) and half of each resulting family was treated to induce triploidy. The paired families were used to test for dosage effects (resulting from triploidy) on (1) the distribution and magnitude of phenotypic variation, (2) narrow-sense heritability and (3) maternal effects in fitness-related traits (i.e., survival, size-at-age, relative growth rate and serum lysozyme activity). Quantitative genetic analyses were performed separately for diploid and triploid family groups. Triploidization resulted in significantly higher levels of phenotypic variance and substantial differences in patterns of variance distribution for growth and survival-related traits, although the patterns were reversed for lysozyme activity. Triploids exhibited higher narrow sense heritability values relative to diploid Chinook salmon. However, maternal effects estimates were generally lower in triploids than in diploids. Thus, the dosage effects resulting from adding an extra set of chromosomes to the Chinook salmon genome are primarily additive. Somewhat counterintuitively, however, the relative magnitude of the combined effects of dominance, epistasis and maternal effects is not affected by dosage. Our results indicate that inheritance of fitness-related quantitative traits is profoundly affected by dosage effects associated with induced triploidy, and that triploidization can result in unpredictable performance and fitness outcomes.
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Affiliation(s)
- R M Johnson
- Ecosystem Science and Management (Biology) Program, University of Northern British Columbia, Prince George, British Columbia, Canada
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Nemergut DR, Johnson RM, Wunch KG, Bennett JW. EXTRACTION AND QUANTIFICATION OF BENZO[a]PYRENE IN SOIL BY REVERSED PHASE THIN LAYER CHROMATOGRAPHY. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-100101474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- D. R. Nemergut
- Department of Cell and Molecular Biology, Tulane University , 2000 Percival Stern Hall, New Orleans, LA, 70118, U.S.A
| | | | - K. G. Wunch
- Department of Cell and Molecular Biology, Tulane University , 2000 Percival Stern Hall, New Orleans, LA, 70118, U.S.A
| | - J. W. Bennett
- Department of Cell and Molecular Biology, Tulane University , 2000 Percival Stern Hall, New Orleans, LA, 70118, U.S.A
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Claudianos C, Ranson H, Johnson RM, Biswas S, Schuler MA, Berenbaum MR, Feyereisen R, Oakeshott JG. A deficit of detoxification enzymes: pesticide sensitivity and environmental response in the honeybee. Insect Mol Biol 2006; 15:615-36. [PMID: 17069637 PMCID: PMC1761136 DOI: 10.1111/j.1365-2583.2006.00672.x] [Citation(s) in RCA: 440] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The honeybee genome has substantially fewer protein coding genes ( approximately 11 000 genes) than Drosophila melanogaster ( approximately 13 500) and Anopheles gambiae ( approximately 14 000). Some of the most marked differences occur in three superfamilies encoding xenobiotic detoxifying enzymes. Specifically there are only about half as many glutathione-S-transferases (GSTs), cytochrome P450 monooxygenases (P450s) and carboxyl/cholinesterases (CCEs) in the honeybee. This includes 10-fold or greater shortfalls in the numbers of Delta and Epsilon GSTs and CYP4 P450s, members of which clades have been recurrently associated with insecticide resistance in other species. These shortfalls may contribute to the sensitivity of the honeybee to insecticides. On the other hand there are some recent radiations in CYP6, CYP9 and certain CCE clades in A. mellifera that could be associated with the evolution of the hormonal and chemosensory processes underpinning its highly organized eusociality.
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Affiliation(s)
- C Claudianos
- Research School of Biological Sciences, Australian National University, Canberra, ACT, Australia.
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Affiliation(s)
- R M Johnson
- Department of Medicine, University of Minnesota Hospital, Minneapolis
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Strege RJ, Liu YJ, Kiely A, Johnson RM, Gillis EM, Storm P, Carson BS, Jallo GI, Guarnieri M. Toxicity and Cerebrospinal Fluid Levels of Carboplatin Chronically Infused into the Brainstem of a Primate. J Neurooncol 2004; 67:327-34. [PMID: 15164988 DOI: 10.1023/b:neon.0000024243.31886.ab] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE Carboplatin was infused into the brainstem of cynomolgus monkeys to investigate neurotoxicity and systemic exposures following chronic local delivery. METHODS Infusions at 0.42 microl/h were intended to deliver 0.025 (n = 2), 0.075 (n = 3), 0.25 (n = 5), and 0.75 (n = 3) mg/kg by day 30. Laboratory tests, radiographic measurements, and clinical observations were used to monitor toxicity. Blood and cerebrospinal fluid (CSF) were sampled for platinum. RESULTS Lethargy and ataxia were observed after week 4 in the monkeys given 0.075 mg/kg, and week 2 in the monkeys given 0.25 mg/kg when the infused doses were approximately 250 and 400 microg, respectively. Rapidly progressive neurotoxicity with the 0.75 mg/kg dose required termination of the infusions at days 4-10. Hematology and chemistry values were unremarkable in all groups. Blood levels of platinum remained undetectable in 0.025 and 0.075 mg/kg dose groups. Levels in the 0.25 mg/kg group were 3.1 +/- 0.6 microg/l at 2 weeks and 5.2 +/- 0.8 microg/l at 1 month. The CSF platinum levels varied. Animals in the 0.25 mg/kg group had higher CSF levels at 2 weeks (avg. 65 microg/l, range 36-89) compared to their 1 month value (avg. 60 microg/l, range 7-170), despite the constant infusion. CONCLUSION Carboplatin can be chronically infused into monkey brainstems. Neurotoxicity is the predominant side effect and is dose-dependent. Pharmacokinetics of local and systemic delivery are different for carboplatin. Further studies are needed to monitor toxicity at higher flow rates and to investigate drug binding to abnormal central nervous system (CNS) tissues.
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Affiliation(s)
- R J Strege
- Division of Pediatric Neurosurgery, Johns Hopkins School of Medicine, Baltimore, MD 21287-8811, USA
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Abstract
OBJECTIVE To systematically review evaluation studies of educational interventions promoting safe firearm storage. METHODS Medline, ERIC, PsycINFO, Criminal Justice Periodicals Index, Cumulative Index of Nursing and Allied Health Literature, and Sociofile were searched. The references from each potentially eligible study were checked, and experts in the field were contacted for additional reports. In addition, an internet search was performed to identify programs not published in the conventional literature. Sources relevant to safe firearm storage promotion were selected and evaluated. RESULTS Seven studies met inclusion criteria: adult subjects, program description was included, and firearm storage outcomes were measured. One was a randomized controlled trial and the other six were one group pre-test and/or post-test. The studies were classified into the following categories based on the intervention strategies used: (1). counseling and firearm safety materials (n=3); (2). counseling/educational message (n=3); and (3). firearm safety materials distribution (n=1). The outcomes were safe firearms storage (firearms locked up and unloaded or removal from home) after intervention. Four studies, three using counseling and materials distribution, reported improved storage after the interventions. CONCLUSIONS It is not yet clear what types of interventions, or which specific intervention components, prompt gun owners to securely store their weapons. Increased understanding of gun storage behaviors and stronger evaluation designs will aid further understanding of this important issue.
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Affiliation(s)
- K S McGee
- Department of Maternal and Child Health, University of North Carolina at Chapel Hill, School of Public Health, Chapel Hill, North Carolina, USA.
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Johnson RM, Mark JE. Properties of Poly(dimethylsiloxane) Networks Prepared in Solution, and Their Use in Evaluating the Theories of Rubberlike Elasticity. Macromolecules 2002. [DOI: 10.1021/ma60025a011] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Johnson RM, Storch GA. Reply. Clin Infect Dis 2002. [DOI: 10.1086/324093] [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: 11/03/2022] Open
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Daigle DJ, Johnson RM, Sands D, Connick WJ. Surface charge properties and soil mobilities of mycoherbicidal spores. Bull Environ Contam Toxicol 2001; 67:617-624. [PMID: 11911629 DOI: 10.1007/s001280169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Affiliation(s)
- D J Daigle
- Southern Regional Research Center, ARS, USDA, New Orleans, LA 70179, USA
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Abstract
OBJECTIVES One way law enforcement officers support firearm safety is by promoting the use of gun locks. This investigation examined law enforcement officers' willingness to use gun locks on their own guns, as well as their opinions regarding gun locks in general. SETTING Law enforcement officers from an urban agency in the southern region of the United States. METHODS Free keyed cable gun locks were distributed to all law enforcement officers in one agency who wanted one, and then an anonymous questionnaire survey was conducted about their subsequent use of, and attitudes toward, these devices. RESULTS About half of the 207 officers collected gun locks (n=103). Nearly three quarters (73%) completed and returned the questionnaire. Two thirds reported that they were not using the gun lock they collected (65%), and over half disagreed that gun lock use should be required (56%). Very few cited any actual or potential technical problems with the device. An important reason given for non-use of gun locks related to being able to access the weapon quickly in case of an emergency. CONCLUSIONS The findings highlight the need for further investigation into law enforcement officers' attitudes toward gun locks, the degree to which their attitudes affect their firearm safety counseling, and the need to develop a gun safety device that can be disengaged quickly.
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Affiliation(s)
- T Coyne-Beasley
- Injury Prevention Research Center and Department of Pediatrics, School of Medicine, University of North Carolina at Chapel Hill, 27599-7225, USA.
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Abstract
BACKGROUND Law enforcement officers play an important role in promoting firearm safety. This study examined their firearm-related attitudes and practices. METHODS We conducted an anonymous, self-administered survey of law enforcement officers in an agency in the South concerning firearm ownership, storage practices, and opinions. RESULTS The 207 respondents (response rate=71%) were primarily white (60%) and male (89%). The proportions of respondents with (55%) and without (45%) children were similar. Eighty percent of the officers had firearms in addition to the one they were issued for work. Most stored firearms unlocked (59%) and loaded (68%); almost half (44%) reported storing firearms both unlocked and loaded. Eighty-five percent indicated that they felt an added need to protect themselves and family because of their job. Those who reported having firearms for self-protection were less likely than those who had firearms for recreation to store firearms securely. As compared to those without children, law enforcement officers with children were more likely to store firearms safely, and were especially likely to store firearms locked up (chi(2)=12.72, p<0.0001). Respondents favored background checks, mandatory safety training, and enforcement of storage laws. Three quarters approved of government safety regulations for handguns. CONCLUSIONS Despite the law enforcement officers' prominent role in firearm safety promotion and support for initiatives that limit unauthorized access, our study found that many do not practice safe storage. Apparently, many officers keep their firearms stored unlocked and loaded for the purpose of protecting themselves and their families. Addressing concerns about personal safety is a necessary step in promoting safe storage to law enforcement officers.
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Affiliation(s)
- T Coyne-Beasley
- Injury Prevention Research Center, Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-7225, USA.
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Smith S, Johnson RM, Pepperman AB. Formulation and tillage effects on atrazine and alachlor in shallow ground water in upland corn production. Bull Environ Contam Toxicol 2001; 67:113-121. [PMID: 11381320 DOI: 10.1007/s001280098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2000] [Accepted: 04/12/2001] [Indexed: 05/23/2023]
Affiliation(s)
- S Smith
- Water Quality and Ecological Processes Research Unit, USDA-ARS-National Sedimentation Laboratory, 598 McElroy Drive, Post Office Box 1157, Oxford, MS 38655-1157, USA
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Coyne-Beasley T, Schoenbach VJ, Johnson RM. "Love our kids, lock your guns": a community-based firearm safety counseling and gun lock distribution program. Arch Pediatr Adolesc Med 2001; 155:659-64. [PMID: 11386952 DOI: 10.1001/archpedi.155.6.659] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND Safer storage practices may reduce injury rates by limiting youth access to firearms. OBJECTIVE To determine if a firearm safety counseling and gun lock distribution program improved storage practices. DESIGN Community-based before-after trial. SETTING Urban county in central North Carolina. PARTICIPANTS One hundred twelve adult gun owners recruited through a mass media advertising campaign. INTERVENTION In the parking lot of a shopping mall, participants completed a survey, and were then provided with tailored counseling, gun safety information, a gun lock, and instructions to use it. MAIN OUTCOME MEASURES Firearm storage practices, assessed by survey and personal interview (baseline) and telephone interview (6-month follow-up). RESULTS Most participants were white (62%), men (63%), had children (58%), and owned a gun for protection (74%). At follow-up, of the 82 participants, 63 (77%) (up from 39 [48%]) reported storing their gun(s) in a locked compartment (P =.004), 59 (72%) (up from 0) reported using gun locks (P =.001), 61 (74%) (up from 57 [69%]) reported storing their ammunition locked in a separate location, 59 (72%) (up from 52 [63%]) reported storing their gun(s) unloaded, and 6 (7%) (down from 15 [18%]) reported storing firearms unlocked and loaded. Participants with children were more likely at baseline to store weapons unlocked and loaded (38 [59%] vs 19 [41%]; P =.02) but were more likely after counseling to lock their weapons (29 [58%] vs 14 [44%]) and remove guns from the home (5 [10%] vs 0 [0%]). CONCLUSIONS This program prompted reporting of safer firearm storage practices, particularly among parents. Longer follow-up, verification of self-reports and correct use, testing of gun locks, and monitoring firearm injury rates after distribution programs are needed to establish the public health potential of this approach.
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Affiliation(s)
- T Coyne-Beasley
- Department of Pediatrics and Internal Medicine, University of North Carolina at Chapel Hill, Campus Box 7225, Wing C, Medical School, Chapel Hill, NC 27599-7225, USA.
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Johnson RM, Little JR, Storch GA. Kawasaki-like syndromes associated with human immunodeficiency virus infection. Clin Infect Dis 2001; 32:1628-34. [PMID: 11340536 DOI: 10.1086/320523] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [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: 07/10/2000] [Revised: 11/07/2000] [Indexed: 11/03/2022] Open
Abstract
Kawasaki disease is an acute febrile vasculitic syndrome of early childhood. It is very rarely seen in adults. Among the adult patients with Kawasaki disease who have been described, a disproportionate number are infected with human immunodeficiency virus (HIV). This suggests that the immunocompromised state may predispose individuals to this syndrome. We report our experience with 2 HIV-positive patients who presented with Kawasaki-like syndromes and review the published literature on HIV-positive patients with similar syndromes.
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Affiliation(s)
- R M Johnson
- Division of Infectious Diseases, Washington University School of Medicine, St. Louis, MO 63110, USA.
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Abstract
Urban trauma centres have recently noted a shift in the causative mechanism of facial fractures away from motor vehicle crashes (MVC) to blunt assaults (BA). This study was conducted to examine the incidence and aetiology of facial fractures at our institution as well as the relationship with alcohol and protective device use. Trauma registry records of all patients admitted to a level I trauma centre from 1 January 1988 to 1 January 1999 were reviewed. There were 13594 trauma admissions during the 11-year period. Facial fractures were sustained by 1429 patients (10.5%) and this group forms the subject of this study. MVC was the predominant aetiology (59.9%) followed by BA (18.8%). Facial fractures were found in 9.5% of restrained MVC patients compared to 15.4% of unrestrained patients (P<0.00l). Non-helmeted motorcyclists were four times more likely to sustain facial fractures (4.3% vs. 18.4%) than helmeted patients (P<0.00l). 39.6% of patients in the MVC group were legally intoxicated compared to 73.5% in the BA group (P<0.00l). 45.4% of unrestrained patients with facial fractures were intoxicated compared to 11.8% of restrained MVC patients with facial fractures (P<0.001). MVC continue to be the primary aetiology of facial fractures in our trauma population. Protective devices decrease the incidence of facial fractures. Lack of protective device use and the consumption of alcohol correlate with sustaining facial fractures.
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Affiliation(s)
- A J Shapiro
- Department of Surgery, Eisenhower Army Medical Center, Fort Gordon, GA 30905, USA.
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Abstract
This study was undertaken because there is a dearth of objective information in the literature on the clinical instability of the cervical spine below C2. To our knowledge, it is the first biomechanical investigation designed to analyze clinical stability. We have carried out a quantitative analysis of the behavior of the spine as a function of the systematic destruction of various anatomic elements. Under controlled conditions designed to maintain the biological integrity of the specimens, 17 motion segments from 8 cervical spines were analyzed. The spines were studied with either flexion or extension simulated using physiologic loads. Some of the more important findings are: (1) In sectioning the ligaments, one observes small increments of change followed without warning by sudden, complete disruption of the spine; (2) Removal of the facets alters the motion segment such that in flexion, there is less angular displacement and more horizontal displacement; (3) The anterior ligaments contribute more to stability in extension than the posterior ligaments and in flexion, the converse is true; (4) The adult cervical spine is unstable, or on the brink of instability, when any of the following conditions are present: a) All the anterior or all the posterior elements are destroyed or unable to function. b) More than 3.5 mm horizontal displacement of one vertebra in relation to an adjacent vertebra measured on lateral roentgenograms (resting or flexion-extension). c) More than 11 degrees of rotation difference to that of either adjacent vertebra measured on a resting lateral or flexion-extension roentgenogram. These findings can be aptly applied to clinical situations and when instability as determined by the above criteria is present, surgical fusion or some other method to achieve stability should be seriously considered. Work is continuing on this problem as we do not consider this to be altogether complete or definitive. Hopefully, this initial study will stimulate further scientific and clinical investigations.
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Abstract
The expression of epsilon- and gamma-globin mRNA and protein has been determined in three Old World monkey species (Macaca mulatta, Macaca nemestrina, and Cercopithecus aethiops). Using RT-PCR with primers for epsilon- and gamma-globin, both mRNAs were detected in early fetal stages, whereas at 128 days (85% of full term), only gamma was expressed. High-performance liquid chromatography was used for separation and quantitation, and matrix-assisted laser desorption/ionization mass spectrometry was used for identification of globin polypeptides. An alpha-globin polymorphism was observed in all of the species examined. During fetal life, gamma-globin was the predominant expressed beta-type globin. The red blood cells of infants still contained substantial amounts of gamma-globin, which declined to negligible levels in 14 weeks as beta-globin expression reached adult values. The ratio of gamma1- to gamma2-globins (equivalent to Ggamma/Agamma in humans) was approximately 2.5, similar to the Ggamma/Agamma ratio observed in humans. Thus, gamma-globin gene expression in these Old World monkeys species has three features in common with human expression: expression of both duplicated gamma genes, the relative preponderance of gamma1 over gamma2 expression, and the delay of the switch from gamma- to beta-globin until the perinatal period. Thus, the catarrhines seem to share a common pattern of developmental switching in the beta-globin gene cluster, which is distinct from the timing of expression in either prosimians or the New World monkeys. Our results indicate that an Old World monkey, such as Rhesus, could serve as a model organism (resembling humans) for experimentally investigating globin gene expression patterns during the embryonic, fetal, and postnatal stages.
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Affiliation(s)
- R M Johnson
- Department of Biochemistry & Molecular Biology, Wayne State Medical School, Detroit, Michigan 48201, USA.
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Abstract
The treatment of burn scar contractures is a major emphasis in the rehabilitation of patients with burn injuries. Many treatment techniques have been used successfully but without a critical investigation of the best practice of care. In this study, we compared the outcomes for pediatric and adult patients treated with a multimodal therapy approach to treatment techniques that are considered to be progressive to determine if differences existed in the techniques. The medical records of 52 patients with documented burn scar contractures were reviewed for patient and rehabilitation treatment parameters. Included were population demographic information and type of treatment intervention used to correct the scar contracture. In particular, the postburn day when the contracture appeared, the percentage of range of motion deficit, the day when definitive treatment that eventually corrected the contracture was begun, and the days required to correct the contracture were noted. With equal range-of-motion deficits identified, the burn scar contractures of patients in the progressive treatment group were corrected in less than half the time of the burn scar contractures of the patients in the multimodal treatment group. This result occurred despite scar contractures that appeared significantly earlier and later initiation of definitive treatment.
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Affiliation(s)
- R Richard
- Miami Valley Hospital Regional Burn Center, Dayton, Ohio, USA
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Johnson RM, Goyette G, Ravindranath Y, Ho YS. Red cells from glutathione peroxidase-1-deficient mice have nearly normal defenses against exogenous peroxides. Blood 2000; 96:1985-8. [PMID: 10961904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
The role of glutathione peroxidase in red cell anti-oxidant defense was examined using erythrocytes from mice with a genetically engineered disruption of the glutathione peroxidase-1 (GSHPx-1) gene. Because GSHPx-1 is the sole glutathione peroxidase in the erythrocyte, all red cell GSH peroxidase activity was eliminated. Oxidation of hemoglobin and membrane lipids, using the cis-parinaric acid assay, was determined during oxidant challenge from cumene hydroperoxide and H(2)O(2). No difference was detected between wild-type red cells and GSHPx-1-deficient cells, even at high H(2)O(2) exposures. Thus, GSHPx-1 appears to play little or no role in the defense of the erythrocyte against exposure to peroxide. Simultaneous exposure to an H(2)O(2) flux and the catalase inhibitor 3-amino-1,2,4-triazole supported this conclusion. Hemoglobin oxidation occurred only when catalase was depleted. Circulating erythrocytes from the GSHPx-1-deficient mice exhibited a slight reduction in membrane thiols, indicating that high exposure to peroxides might occur naturally in the circulation. (Blood. 2000;96:1985-1988)
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Affiliation(s)
- R M Johnson
- Department of Biochemistry and Molecular Biology, Wayne State Medical School, Detroit, MI 48201, USA.
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Abstract
Mood and behavior changes that have a seasonal pattern were first called seasonal affective disorder (SAD) in 1984. SAD, which affects about 5% of Americans, is most common among reproductive-age women. Afflicted patients typically experience debilitating somatic complaints of fatigue, discomfort, lethargy and atypical depressive complaints of hypersomnia, increased appetite, carbohydrate craving, and weight gain. This article presents current issues in the clinical assessment and management of SAD.
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Johnson RM. Balancing a large scale of responsibility: an interview with R. Milton Johnson. Healthc Financ Manage 2000; 54:33-4. [PMID: 11010179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Woodcock RJ, Marx WF, Johnson RM, Lowe JM, Lipper MH, Kallmes DF. Needle diameter in outpatient myelography: rates of adverse effects and current practice trends. Neuroradiology 2000; 42:371-4. [PMID: 10872160 DOI: 10.1007/s002340050902] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Telephone calls were made to 1251 consecutive patients one day following outpatient myelography. Data were available on 518 patients punctured with 22-gauge (g) (large-diameter) and 465 with 25-g (small-diameter) spinal needles. We surveyed 48 academic and private practice groups regarding needle diameter use in myelography; data were obtained from 34 private practice and 14 academic radiology departments. Patients reported adverse effects including mild and severe headache, back pain and nausea. The percentage of total adverse effects was significantly greater in the 22-g than in the 25-g needle group. The percentage of patients with headache was higher in the 22-g than in the 25-g group, but this difference was not statistically significant. Only 19% of private practice groups and 17% of academic centers use 25-g needles; the remainder use 20-g or 22-g needles.
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Affiliation(s)
- R J Woodcock
- Department of Radiology, University of Virginia, Charlottesville 22908, USA.
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Raymon HK, Thode S, Zhou J, Friedman GC, Pardinas JR, Barrere C, Johnson RM, Sah DW. Immortalized human dorsal root ganglion cells differentiate into neurons with nociceptive properties. J Neurosci 1999; 19:5420-8. [PMID: 10377351 PMCID: PMC6782307] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
A renewable source of human sensory neurons would greatly facilitate basic research and drug development. We had established previously conditionally immortalized human CNS cell lines that can differentiate into functional neurons (). We report here the development of an immortalized human dorsal root ganglion (DRG) clonal cell line, HD10.6, with a tetracycline-regulatable v-myc oncogene. In the proliferative condition, HD10.6 cells have a doubling time of 1.2 d and exhibit a neuronal precursor morphology. After differentiation of clone HD10.6 for 7 d in the presence of tetracycline, v-myc expression was suppressed, and >50% of the cells exhibited typical neuronal morphology, stained positively for neuronal cytoskeletal markers, and fired action potentials in response to current injection. Furthermore, this cell line was fate-restricted to a neuronal phenotype; even in culture conditions that promote Schwann cell or smooth muscle differentiation of neural crest stem cells, HD10.6 differentiated exclusively into neurons. Moreover, differentiated HD10.6 cells expressed sensory neuron-associated transcription factors and exhibited capsaicin sensitivity. Taken together, these data indicate that we have established an immortalized human DRG cell line that can differentiate into sensory neurons with nociceptive properties. The cell line HD10.6 represents the first example of a human sensory neuronal line and will be valuable for basic research, as well as for the discovery of novel drug targets and clinical candidates.
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Affiliation(s)
- H K Raymon
- Signal Pharmaceuticals Incorporated, San Diego, California 92121, USA
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