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Suzon B, Louis-Sidney F, Abel A, Moinet F, Bagoée C, Henry K, Coco-Viloin I, Cougnaud R, Wolff S, Guilpain P, Rivière S, Flori N, Deligny C, Maria A. [Severe small bowel involvement and chronic intestinal pseudo-obstruction in systemic sclerosis (scleroderma): Pathophysiological, diagnostic and therapeutic basis, including parenteral nutrition]. Rev Med Interne 2024; 45:147-155. [PMID: 38388303 DOI: 10.1016/j.revmed.2024.02.001] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 01/15/2024] [Accepted: 02/03/2024] [Indexed: 02/24/2024]
Abstract
Gastrointestinal involvement in systemic sclerosis can be severe, reaching the critical point of chronic intestinal pseudo-obstruction, secondary to major disorders of small bowel motility. It is associated with some clinical and biological characteristics, in particular the positivity of anti-fibrillarin/U3RNP antibodies. Chronic intestinal pseudo-obstruction (CIPO) is complicated by a small intestinal bacterial overgrowth that requires cyclic antibiotic therapy. CIPO leads to a reduction of the food intake, due to painful symptoms, nausea and vomiting caused by meals, and ultimately to severe malnutrition. Meal splitting is often transiently effective and patients require exogenous nutritional support, mostly parenteral. Systemic sclerosis is not an obstacle to initiation and long-term continuation of parenteral nutrition and central venous catheter implantation is not associated with an increased risk of cutaneous or infectious complications. However, continuation of long-term parenteral nutrition requires monitoring in an expert nutrition center in order to adapt nutritional volumes and intakes and to limit potentially fatal cardiac and hepatobiliary complications. In addition to nutrition, prokinetic treatments, whose side effects must be known, can be associated. Invasive procedures, whose risk-benefit ratio must be carefully assessed, can also be used to treat symptoms exclusively.
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Affiliation(s)
- B Suzon
- Médecine Interne, CHU de Martinique, Fort-de-France, Martinique; Unité EpiCliV, Université des Antilles, Fort-de-France, Martinique.
| | - F Louis-Sidney
- Unité EpiCliV, Université des Antilles, Fort-de-France, Martinique; Rhumatologie, CHU de Martinique, Fort-de-France, Martinique
| | - A Abel
- Médecine Interne, CHU de Martinique, Fort-de-France, Martinique
| | - F Moinet
- Médecine Interne, CHU de Martinique, Fort-de-France, Martinique
| | - C Bagoée
- Médecine interne et polyvalente, Centre hospitalier territorial Gaston-Bourret, Nouméa, Nouvelle-Calédonie
| | - K Henry
- Maladies infectieuses et tropicales, Centre hospitalier de Cayenne, Cayenne, Guyane
| | - I Coco-Viloin
- Médecine Interne, CHU de Martinique, Fort-de-France, Martinique
| | - R Cougnaud
- Médecine Interne, CHU de Martinique, Fort-de-France, Martinique
| | - S Wolff
- Médecine Interne, CHU de Martinique, Fort-de-France, Martinique
| | - P Guilpain
- Médecine interne et maladies multi-organiques, Hôpital Saint Eloi, CHU de Montpellier, Montpellier, France; Institut de médecine régénérative et biothérapies, Inserm U1183, Montpellier, France; Faculté de médecine, Université de Montpellier, Montpellier, France
| | - S Rivière
- Médecine interne et maladies multi-organiques, Hôpital Saint Eloi, CHU de Montpellier, Montpellier, France
| | - N Flori
- Centre expert régional de nutrition, ICM, Montpellier, France
| | - C Deligny
- Médecine Interne, CHU de Martinique, Fort-de-France, Martinique; Unité EpiCliV, Université des Antilles, Fort-de-France, Martinique
| | - A Maria
- Institut de médecine régénérative et biothérapies, Inserm U1183, Montpellier, France; Faculté de médecine, Université de Montpellier, Montpellier, France; Médecine interne et immuno-oncologie (MedI2O), Hôpital Saint-Eloi, CHU de Montpellier, Montpellier, France
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2
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Viengkhou B, Hong C, Mazur C, Damle S, Gallo NB, Fang TC, Henry K, Campbell IL, Kamme F, Hofer MJ. Interferon-α receptor antisense oligonucleotides reduce neuroinflammation and neuropathology in a mouse model of cerebral interferonopathy. J Clin Invest 2024; 134:e169562. [PMID: 38357922 PMCID: PMC10869178 DOI: 10.1172/jci169562] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 12/29/2023] [Indexed: 02/16/2024] Open
Abstract
Chronic and elevated levels of the antiviral cytokine IFN-α in the brain are neurotoxic. This is best observed in patients with genetic cerebral interferonopathies such as Aicardi-Goutières syndrome. Cerebral interferonopathies typically manifest in early childhood and lead to debilitating disease and premature death. There is no cure for these diseases with existing treatments largely aimed at managing symptoms. Thus, an effective therapeutic strategy is urgently needed. Here, we investigated the effect of antisense oligonucleotides targeting the murine IFN-α receptor (Ifnar1 ASOs) in a transgenic mouse model of cerebral interferonopathy. Intracerebroventricular injection of Ifnar1 ASOs into transgenic mice with brain-targeted chronic IFN-α production resulted in a blunted cerebral interferon signature, reduced neuroinflammation, restoration of blood-brain barrier integrity, absence of tissue destruction, and lessened neuronal damage. Remarkably, Ifnar1 ASO treatment was also effective when given after the onset of neuropathological changes, as it reversed such disease-related features. We conclude that ASOs targeting the IFN-α receptor halt and reverse progression of IFN-α-mediated neuroinflammation and neurotoxicity, opening what we believe to be a new and promising approach for the treatment of patients with cerebral interferonopathies.
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Affiliation(s)
- Barney Viengkhou
- School of Life and Environmental Sciences and the Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | | | - Curt Mazur
- Ionis Pharmaceuticals, Carlsbad, California, USA
| | - Sagar Damle
- Ionis Pharmaceuticals, Carlsbad, California, USA
| | | | | | - Kate Henry
- Biogen Inc, Cambridge, Massachusetts, USA
| | - Iain L. Campbell
- School of Life and Environmental Sciences and the Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | | | - Markus J. Hofer
- School of Life and Environmental Sciences and the Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
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Tien E, Grubor B, Kirkland M, Chan SJ, van der Munnik N, Xu W, Henry K, Hamann S, Wei C, Lee WH, Gianni D, Brennecke A, Nambiar K, Chen J, Liu B, Shen S, Tremblay C, Plowey ED, Trapa P, Fikes J, Suh J, Morris D. Adeno-Associated Virus-Mediated Dorsal Root Ganglion Toxicity in the New Zealand White Rabbit. Toxicol Pathol 2024; 52:35-54. [PMID: 38385340 DOI: 10.1177/01926233241229808] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Recombinant adeno-associated virus (AAV)-mediated degeneration of sensory neurons in the dorsal root ganglia (DRG) and trigeminal ganglia (TG) has been observed in non-human primates (NHPs) following intravenous (IV) and intrathecal (IT) delivery. Administration of recombinant AAV encoding a human protein transgene via a single intra-cisterna magna (ICM) injection in New Zealand white rabbits resulted in histopathology changes very similar to NHPs: mononuclear cell infiltration, degeneration/necrosis of sensory neurons, and nerve fiber degeneration of sensory tracts in the spinal cord and of multiple nerves. AAV-associated clinical signs and incidence/severity of histologic findings indicated that rabbits were equally or more sensitive than NHPs to sensory neuron damage. Another study using human and rabbit transgene constructs of the same protein demonstrated comparable changes suggesting that the effects are not an immune response to the non-self protein transgene. Rabbit has not been characterized as a species for general toxicity testing of AAV gene therapies, but these studies suggest that it may be an alternative model to investigate mechanisms of AAV-mediated neurotoxicity and test novel AAV designs mitigating these adverse effects.
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Affiliation(s)
- Eric Tien
- Biogen Inc., Cambridge, Massachusetts, USA
| | | | | | - Su Jing Chan
- Voyager Therapeutics, Inc., Lexington, Massachusetts, USA
| | | | - Wenlong Xu
- Sonata Therapeutics, Watertown, Massachusetts, USA
| | - Kate Henry
- Biogen Inc., Cambridge, Massachusetts, USA
| | | | - Cong Wei
- Biogen Inc., Cambridge, Massachusetts, USA
| | | | | | | | | | - Jeron Chen
- Voyager Therapeutics, Inc., Lexington, Massachusetts, USA
| | - Bin Liu
- Vertex, Boston, Massachusetts, USA
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Chinain M, Gatti Howell C, Roué M, Ung A, Henry K, Revel T, Cruchet P, Viallon J, Darius HT. Ciguatera poisoning in French Polynesia: A review of the distribution and toxicity of Gambierdiscus spp., and related impacts on food web components and human health. Harmful Algae 2023; 129:102525. [PMID: 37951623 DOI: 10.1016/j.hal.2023.102525] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 09/26/2023] [Accepted: 10/07/2023] [Indexed: 11/14/2023]
Abstract
Ciguatera Poisoning (CP) is a seafood poisoning highly prevalent in French Polynesia. This illness results from the consumption of seafood contaminated with ciguatoxins (CTXs) produced by Gambierdiscus, a benthic dinoflagellate. Ciguatera significantly degrades the health and economic well-being of local communities largely dependent on reef fisheries for their subsistence. French Polynesia has been the site of rich and active CP research since the 1960's. The environmental, toxicological, and epidemiological data obtained in the frame of large-scale field surveys and a country-wide CP case reporting program conducted over the past three decades in the five island groups of French Polynesia are reviewed. Results show toxin production in Gambierdiscus in the natural environment may vary considerably at a temporal and spatial scale, and that several locales clearly represent Gambierdiscus spp. "biodiversity hotspots". Current data also suggest the "hot" species G. polynesiensis could be the primary source of CTXs in local ciguateric biotopes, pending formal confirmation. The prevalence of ciguatoxic fish and the CTX levels observed in several locales were remarkably high, with herbivores and omnivores often as toxic as carnivores. Results also confirm the strong local influence of Gambierdiscus spp. on the CTX toxin profiles characterized across multiple food web components including in CP-prone marine invertebrates. The statistics, obtained in the frame of a long-term epidemiological surveillance program established in 2007, point towards an apparent decline in the number of CP cases in French Polynesia as a whole; however, incidence rates remain dangerously high in some islands. Several of the challenges and opportunities, most notably those linked to the strong cultural ramifications of CP among local communities, that need to be considered to define effective risk management strategies are addressed.
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Affiliation(s)
- M Chinain
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia.
| | - C Gatti Howell
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - M Roué
- Institut de Recherche pour le Développement (IRD), UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 6570, Faa'a, Tahiti 98702, French Polynesia
| | - A Ung
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - K Henry
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - T Revel
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - P Cruchet
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - J Viallon
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
| | - H T Darius
- Institut Louis Malardé (ILM), Laboratory of Marine Biotoxins, UMR 241-EIO (IFREMER, ILM, IRD, UPF), P.O. Box 30, Papeete, Tahiti 98713, French Polynesia
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Suzon B, Louis-Sidney F, Aglaé C, Henry K, Bagoée C, Wolff S, Moinet F, Emal-Aglae V, Polomat K, Debandt M, Deligny C, Couturier A. La néphropathie lupique en Martinique : un exemple de bon pronostic à long terme dans une population afro-descendante. Rev Med Interne 2022. [DOI: 10.1016/j.revmed.2022.10.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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de Fritsch E, Louis-Sidney F, Moinet F, Polomat K, Bagoee C, Henry K, Wolff S, Félix A, Drame M, Deligny C, Suzon B. La maladie de Still de l’adulte dans la population afro-descendante : épidémiologie et caractéristiques des patients suivis en Martinique. Rev Med Interne 2022. [DOI: 10.1016/j.revmed.2022.10.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Henry K, Deligny C, Witkowski Durand Viel P, Morel J, Guilpain P, Goulabchand R. [Infections in primary Sjögren's syndrome patients: "Real-life" study of 109 patients from Montpellier university hospital]. Rev Med Interne 2022; 43:696-702. [PMID: 36372632 DOI: 10.1016/j.revmed.2022.08.010] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 07/26/2022] [Accepted: 08/24/2022] [Indexed: 11/12/2022]
Abstract
INTRODUCTION Infections are responsible for a part of the overall mortality in primary Sjögren's syndrome patients (pSS). Our retrospective monocentric study aimed at describing infections reported in a population of pSS hospitalized patients, along with the characteristics of their disease. METHODS Patients with SS have been randomly selected from our hospital database claim, between 2009 and 2018. After careful analysis of their medical chart, only patients with pSS and fulfilling ACR/EULAR 2016 diagnosis criteria were included. We collected main clinical, biological and pathological characteristics of SS, along with all the reported infections during the follow-up. The characteristics of the disease were compared according to the presence of an infection in hospitalization. RESULTS In total, 109 pSS patients were included (93% of women, mean age 53.6±14.3 years, mean follow-up 8.2±8.4 years). Fifty-one percent had been exposed to hydroxychloroquine (HCQ). Seventy-eight infections were recorded in 47 (43%) patients. Twenty-five infections were recorded in hospitalization (5 in critical care) in 20 (18%) patients, whom leading causes were urinary tract (28%), pulmonary (24%), ENT (16%), and intestinal (12%) infections. pSS patients with infections in hospitalization were older, exhibited more hypocomplementemia, and were less exposed to HCQ. We found no difference in immunosuppressive treatments exposure. CONCLUSIONS The impact of HCQ exposure on infectious risk needs further investigations. Broad vaccination campaign and tight control of sicca syndrome could lead to a better control of infection risk.
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Affiliation(s)
- K Henry
- Département de médecine interne et maladies multi-organiques (MIMMO), CHU de Montpellier, hôpital Saint-Éloi, Montpellier, France; Service de médecine interne, CHU de Pierre-Zobda-Quitman, Fort-de-France, Martinique, France.
| | - C Deligny
- Service de médecine interne, CHU de Pierre-Zobda-Quitman, Fort-de-France, Martinique, France
| | - P Witkowski Durand Viel
- Département de médecine interne et maladies multi-organiques (MIMMO), CHU de Montpellier, hôpital Saint-Éloi, Montpellier, France; Université Montpellier, Montpellier, France
| | - J Morel
- Université Montpellier, Montpellier, France; Département de rhumatologie, CHU de Montpellier, hôpital Lapeyronie, Montpellier, France; Inserm, PhyMedExp, CNRS, université de Montpellier, Montpellier, France
| | - P Guilpain
- Département de médecine interne et maladies multi-organiques (MIMMO), CHU de Montpellier, hôpital Saint-Éloi, Montpellier, France; Université Montpellier, Montpellier, France; Inserm, IRMB, université Montpellier, Montpellier, France
| | - R Goulabchand
- Université Montpellier, Montpellier, France; Inserm, IRMB, université Montpellier, Montpellier, France; Médecine interne, CHU de Nîmes, Nîmes, France.
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Akpaka E, Henry K, Thompson R, Unakal C. Streptococcus agalactiae colonization among a cross section of patients attending antenatal clinic in Trinidad and Tobago. Int J Infect Dis 2022. [DOI: 10.1016/j.ijid.2021.12.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Gu RF, Fang T, Nelson A, Gyoneva S, Gao B, Hedde J, Henry K, Peterson E, Burkly LC, Wei R. Proteomic Characterization of the Dynamics of Ischemic Stroke in Mice. J Proteome Res 2021; 20:3689-3700. [PMID: 34085531 PMCID: PMC8256414 DOI: 10.1021/acs.jproteome.1c00259] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
![]()
Novel therapies and biomarkers are
needed for the treatment of
acute ischemic stroke (AIS). This study aimed to provide comprehensive
insights into the dynamic proteome changes and underlying molecular
mechanisms post-ischemic stroke. TMT-coupled proteomic analysis was
conducted on mouse brain cortex tissue from five time points up to
4 weeks poststroke in the distal hypoxic-middle cerebral artery occlusion
(DH-MCAO) model. We found that nearly half of the detected proteome
was altered following stroke, but only ∼8.6% of the changes
were at relatively large scales. Clustering on the changed proteome
defined four distinct expression patterns characterized by temporal
and quantitative changes in innate and adaptive immune response pathways
and cytoskeletal and neuronal remodeling. Further analysis on a subset
of 309 “top hits”, which temporally responded to stroke
with relatively large and sustained changes, revealed that they were
mostly secreted proteins, highly correlated to different cortical
cytokines, and thereby potential pharmacodynamic biomarker candidates
for inflammation-targeting therapies. Closer examination of the top
enriched neurophysiologic pathways identified 57 proteins potentially
associated with poststroke recovery. Altogether, our study generated
a rich dataset with candidate proteins worthy of further validation
as biomarkers and/or therapeutic targets for stroke. The proteomics
data are available in the PRIDE Archive with identifier PXD025077.
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Affiliation(s)
- Rong-Fang Gu
- Chemical Biology and Proteomics, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Terry Fang
- Genetic and Neurodevelopmental Disorders Research, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Ashley Nelson
- Genetic and Neurodevelopmental Disorders Research, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Stefka Gyoneva
- Genetic and Neurodevelopmental Disorders Research, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Benbo Gao
- Chemical Biology and Proteomics, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Joe Hedde
- Genetic and Neurodevelopmental Disorders Research, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Kate Henry
- Genetic and Neurodevelopmental Disorders Research, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Emily Peterson
- Medicinal Chemistry, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Linda C Burkly
- Genetic and Neurodevelopmental Disorders Research, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
| | - Ru Wei
- Chemical Biology and Proteomics, Biogen, 225 Binney Street, Cambridge, Massachusetts 02142, United States
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To N, Bekker HL, Henry K, Melling P, Turley J, Lodge JPA, Young AL. COVID-19 restrictions on multidisciplinary team meeting decision-making: service evaluation in a major UK cancer centre. Br J Surg 2021; 108:e162-e163. [PMID: 33778851 PMCID: PMC8083657 DOI: 10.1093/bjs/znab009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/03/2020] [Accepted: 12/27/2020] [Indexed: 11/12/2022]
Affiliation(s)
- N To
- Department of Pancreatic Surgery, St James's University Hospital, Leeds, UK
| | - H L Bekker
- Department of Medical Decision-making, University of Leeds, UK
| | - K Henry
- Cancer Team, St James's University Hospital, Leeds, UK
| | - P Melling
- Cancer Team, St James's University Hospital, Leeds, UK
| | - J Turley
- Cancer Team, St James's University Hospital, Leeds, UK
| | - J P A Lodge
- Cancer Team, St James's University Hospital, Leeds, UK.,Department of Hepatobiliary Surgery, St James's University Hospital, Leeds, UK
| | - A L Young
- Department of Pancreatic Surgery, St James's University Hospital, Leeds, UK
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Lathouwers E, Wong EY, Brown K, Baugh B, Ghys A, Jezorwski J, Mohsine EG, Van Landuyt E, Opsomer M, De Meyer S, De Wit S, Florence E, Vandekerckhove L, Vandercam B, Brunetta J, Klein M, Murphy D, Rachlis A, Walmsley S, Ajana F, Cotte L, Girard PM, Katlama C, Molina JM, Poizot-Martin I, Raffi F, Rey D, Reynes J, Teicher E, Yazdanpanah Y, Arastéh K, Bickel M, Bogner J, Esser S, Faetkenheuer G, Jessen H, Kern W, Rockstroh J, Spinner C, Stellbrink HJ, Stoehr A, Antinori A, Castelli F, Chirianni A, De Luca A, Di Biagio A, Galli M, Lazzarin A, Maggiolo F, Maserati R, Mussini C, Garlicki A, Gasiorowski J, Halota W, Horban A, Parczewski M, Piekarska A, Belonosova E, Chernova O, Dushkina N, Kulagin V, Ryamova E, Shuldyakov A, Sizova N, Tsybakova O, Voronin E, Yakovlev A, Antela A, Arribas JR, Berenguer J, Casado J, Estrada V, Galindo MJ, Garcia Del Toro M, Gatell JM, Gorgolas M, Gutierrez F, Gutierrez MDM, Negredo E, Pineda JA, Podzamczer D, Portilla Sogorb J, Rivero A, Rubio R, Viciana P, De Los Santos I, Clarke A, Gazzard BG, Johnson MA, Orkin C, Reeves I, Waters L, Benson P, Bhatti L, Bredeek F, Crofoot G, Cunningham D, DeJesus E, Eron J, Felizarta F, Franco R, Gallant J, Hagins D, Henry K, Jayaweera D, Lucasti C, Martorell C, McDonald C, McGowan J, Mills A, Morales-Ramirez J, Prelutsky D, Ramgopal M, Rashbaum B, Ruane P, Slim J, Wilkin A, deVente J, De Wit S, Florence E, Moutschen M, Van Wijngaerden E, Vandekerckhove L, Vandercam B, Brunetta J, Conway B, Klein M, Murphy D, Rachlis A, Shafran S, Walmsley S, Ajana F, Cotte L, Girard PM, Katlama C, Molina JM, Poizot-Martin I, Raffi F, Rey D, Reynes J, Teicher E, Yazdanpanah Y, Gasiorowski J, Halota W, Horban A, Piekarska A, Witor A, Arribas JR, Perez-Valero I, Berenguer J, Casado J, Gatell JM, Gutierrez F, Galindo MJ, Gutierrez MDM, Iribarren JA, Knobel H, Negredo E, Pineda JA, Podzamczer D, Portilla Sogorb J, Pulido F, Ricart C, Rivero A, Santos Gil I, Blaxhult A, Flamholc L, Gisslèn M, Thalme A, Fehr J, Rauch A, Stoeckle M, Clarke A, Gazzard BG, Johnson MA, Orkin C, Post F, Ustianowski A, Waters L, Bailey J, Benson P, Bhatti L, Brar I, Bredeek UF, Brinson C, Crofoot G, Cunningham D, DeJesus E, Dietz C, Dretler R, Eron J, Felizarta F, Fichtenbaum C, Gallant J, Gathe J, Hagins D, Henn S, Henry KW, Huhn G, Jain M, Lucasti C, Martorell C, McDonald C, Mills A, Morales-Ramirez J, Mounzer K, Nahass R, Olivet H, Osiyemi O, Prelutsky D, Ramgopal M, Rashbaum B, Richmond G, Ruane P, Scarsella A, Scribner A, Shalit P, Shamblaw D, Slim J, Tashima K, Voskuhl G, Ward D, Wilkin A, de Vente J. Week 48 Resistance Analyses of the Once-Daily, Single-Tablet Regimen Darunavir/Cobicistat/Emtricitabine/Tenofovir Alafenamide (D/C/F/TAF) in Adults Living with HIV-1 from the Phase III Randomized AMBER and EMERALD Trials. AIDS Res Hum Retroviruses 2020; 36:48-57. [PMID: 31516033 PMCID: PMC6944133 DOI: 10.1089/aid.2019.0111] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Darunavir/cobicistat/emtricitabine/tenofovir alafenamide (D/C/F/TAF) 800/150/200/10 mg is being investigated in two Phase III trials, AMBER (NCT02431247; treatment-naive adults) and EMERALD (NCT02269917; treatment-experienced, virologically suppressed adults). Week 48 AMBER and EMERALD resistance analyses are presented. Postbaseline samples for genotyping/phenotyping were analyzed from protocol-defined virologic failures (PDVFs) with viral load (VL) ≥400 copies/mL at failure/later time points. Post hoc analyses were deep sequencing in AMBER, and HIV-1 proviral DNA from baseline samples (VL <50 copies/mL) in EMERALD. Through week 48 across both studies, no darunavir, primary PI, or tenofovir resistance-associated mutations (RAMs) were observed in HIV-1 viruses of 1,125 participants receiving D/C/F/TAF or 629 receiving boosted darunavir plus emtricitabine/tenofovir-disoproxil-fumarate. In AMBER, the nucleos(t)ide analog reverse transcriptase inhibitor (N(t)RTI) RAM M184I/V was identified in HIV-1 of one participant during D/C/F/TAF treatment. M184V was detected pretreatment as a minority variant (9%). In EMERALD, in participants with prior VF and genoarchive data (N = 140; 98 D/C/F/TAF and 42 control), 4% had viruses with darunavir RAMs, 38% with emtricitabine RAMs, mainly at position 184 (41% not fully susceptible to emtricitabine), 4% with tenofovir RAMs, and 21% ≥ 3 thymidine analog-associated mutations (24% not fully susceptible to tenofovir) detected at screening. All achieved VL <50 copies/mL at week 48 or prior discontinuation. D/C/F/TAF has a high genetic barrier to resistance; no darunavir, primary PI, or tenofovir RAMs were observed through 48 weeks in AMBER and EMERALD. Only one postbaseline M184I/V RAM was observed in HIV-1 of an AMBER participant. In EMERALD, baseline archived RAMs to darunavir, emtricitabine, and tenofovir in participants with prior VF did not preclude virologic response.
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Affiliation(s)
| | - Eric Y Wong
- Janssen Scientific Affairs, LLC, Titusville, New Jersey
| | | | - Bryan Baugh
- Janssen Research & Development LLC, Raritan, New Jersey
| | - Anne Ghys
- Janssen Pharmaceutica NV, Beerse, Belgium
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Henry K, Pandya D, Nikunj B, Nagle V, Dilling T, Wadas T, Lewis J. Teaching old ligands new tricks: macrocyclic chelators for zirconium-89 radiochemistry. Nucl Med Biol 2019. [DOI: 10.1016/s0969-8051(19)30229-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Klos B, Patel P, Rose C, Bush T, Conley L, Kojic EM, Henry K, Brooks JT, Hammer J. Lower serum adiponectin level is associated with lipodystrophy among HIV-infected men in the Study to Understand the Natural History of HIV/AIDS in the Era of Effective Therapy (SUN) study. HIV Med 2019; 20:534-541. [PMID: 31149766 DOI: 10.1111/hiv.12754] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Adiponectin levels are inversely related to cardiovascular risk and are low in diabetics and obese persons. We examined the association between adiponectin concentration and HIV-associated lipodystrophy, which remains unclear. METHODS The Study to Understand the Natural History of HIV/AIDS in the Era of Effective Therapy (SUN) was a prospective cohort study of HIV-infected adults conducted in four US cities. Lean body and fat masses were assessed using dual-energy X-ray absorptiometry scans. Using baseline data from 2004 to 2006, we defined lipodystrophy using a sex-specific fat mass ratio and performed cross-sectional analyses of associated risks using multivariable logistic regression. RESULTS Among 440 male participants (median age 42 years; 68% non-Hispanic white; 88% prescribed combination antiretroviral therapy; median CD4 lymphocyte count 468 cells/μL; 76% with viral load < 400 HIV-1 RNA copies/mL; 5% diabetic; median body mass index 25 kg/m2 ), median concentrations of leptin and adiponectin were 3.04 ng/L [interquartile range (IQR) 1.77-5.43 ng/L] and 8005 μg/mL (IQR 4950-11 935 μg/mL), respectively. The prevalence of lipodystrophy was 14%. Lipodystrophy was significantly associated with increasing age [prevalence ratio (PR) 1.50; 95% confidence interval (CI) 1.10-2.06, per 10 years], adiponectin < 8005 μg/mL (PR 5.02; 95% CI 2.53-9.95), ever stavudine use (PR 2.26; 95% CI 1.36-3.75), CD4 cell count > 500 cells/μL (PR 2.59; 95% CI 1.46-4.61), viral load < 400 copies/mL (PR 3.98; 95% CI 1.25-12.6), highly sensitive C-reactive protein < 1.61 mg/L (PR 1.91; 95% CI 1.11-3.28) and smoking (PR 0.42; 95% CI 0.22-0.78). CONCLUSIONS Among men in this HIV-infected cohort, the prevalence of lipodystrophy was similar to previous estimates for persons living with HIV, and was associated with lower adiponectin levels, potentially indicating increased cardiovascular disease risk.
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Affiliation(s)
- B Klos
- Emory University, Atlanta, GA, USA.,Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - P Patel
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - C Rose
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - T Bush
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - L Conley
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - E M Kojic
- Brown University, Providence, RI, USA
| | - K Henry
- Hennepin County Medical Center, University of Minnesota, Minneapolis, MN, USA
| | - J T Brooks
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - J Hammer
- Denver Infectious Disease Consultants, Denver, CO, USA
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Stinson SE, Taibi A, Henry K, Sherman PM, Comelli E. A280 RECOVERY OF PROBIOTIC LACTOBACILLI ADMINISTERED SINCE PREGNANCY IN TWO-MONTH-OLD CD-1 MICE OFFSPRING. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- S E Stinson
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada
| | - A Taibi
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada
| | - K Henry
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - P M Sherman
- Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - E Comelli
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada
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Ikeda S, Henry K. Effects of Partial Replacement of Gelatin in High Sugar Gels with Gellan on their Textural, Rhelogical, and Thermal Properties. FOOD BIOPHYS 2016. [DOI: 10.1007/s11483-016-9454-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Aqel N, El-Hady S, Henry K, Quigley M, Hanham I. Small Cell Carcinoma of the Prostate. Int J Surg Pathol 2016. [DOI: 10.1177/106689699500200311] [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: 11/15/2022]
Abstract
An 82-year-old man, who 7 years previously had been treated for adenocarcinoma of the prostate, was found to have developed a small cell (oat cell) carcinoma of prostate, which presented with liver metastases. The expression of different neuroendo crine markers in these carcinomas is presented, the histogenesis of small cell carcinoma is discussed, and the relevant literature is reviewed. The importance of the recognition of small cell carcinoma of the prostate is emphasized because of the influence of small cell carcinoma on the prognosis. Int J Surg Pathol 2(3):237-244, 1995
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Affiliation(s)
- N.M. Aqel
- Department of Histopathology, Charing Cross and Westminster Medical School
| | - S. El-Hady
- Department of Histopathology, Charing Cross and Westminster Medical School
| | - K. Henry
- Department of Histopathology, Charing Cross and Westminster Medical School
| | - M. Quigley
- Department of Radiotherapy, Westminster Hospital, London, U.K
| | - I. Hanham
- Department of Radiotherapy, Westminster Hospital, London, U.K
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Önen NF, Patel P, Baker J, Conley L, Brooks JT, Bush T, Henry K, Hammer J, Kojic EM, Overton ET. Frailty and Pre-Frailty in a Contemporary Cohort of HIV-Infected Adults. J Frailty Aging 2016; 3:158-65. [PMID: 27050062 DOI: 10.14283/jfa.2014.18] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
OBJECTIVES To determine the prevalence of pre-frailty among HIV-infected persons and associations with pre-frailty and frailty in this population. DESIGN, SETTING AND PARTICIPANTS From a contemporary, prospective observational cohort of HIV-infected persons (SUN Study), we determined, using a cross-sectional analytic study design, the proportions of non-frail, pre-frail, and frail persons by the respective presence of 0, 1-2, and ≥ 3 of 5 established frailty criteria: unintentional weight loss, exhaustion, physical-inactivity, weak-grip and slow-walk. We evaluated associations with pre-frailty/frailty using multivariate analysis. RESULTS Of 322 participants assessed (79% men, 58% white non-Hispanic, median age 47 years, 95% on combination antiretroviral therapy [cART], median CD4 + cell count 641 cells/mm3 and 93% HIV RNA < 400 copies/mL), 57% were non-frail, 38% pre-frail, and 5% frail. Age increased from non-frailty through frailty. Notably, however, half of pre-frail and frail participants were < 50 years, and of those, 42% and 100%, respectively, were long-term unemployed (versus 16% of non-frail counterparts). In multivariate analysis, pre-frail/frail participants were more likely to have Hepatitis C seropositivity (adjusted odds ratio [aOR] 3.24, 95% CI: 1.35-7.78), a history of AIDS-defining-illness (aOR 3.51, 95% CI: 1.82-6.76), greater depressive symptoms (aOR 1.16, 95% CI:1.09-1.23), higher D-dimer levels (aOR 2.94, 95% CI:1.10-7.87), and were less likely to be white non-Hispanic (aOR 0.35, 95% CI: 0.20-0.61). CONCLUSIONS Pre-frailty and frailty are prevalent in the cART era and are associated with unemployment even among persons < 50 years. Pre-frailty appears to be an intermediate state in the spectrum from non-frailty through frailty and our characterization of pre-frailty/frailty suggests complex multifactorial associations.
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Affiliation(s)
- N F Önen
- Nur F. Önen, MD, Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, Box 8051, 660 S. Euclid Ave, St. Louis, MO, 63110, USA. Phone: 314 454 8225; Fax 314 362 6295;
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Affiliation(s)
- P Minnis
- From the Dept. of Respiratory Medicine, St Vincent's University Hospital and School of Medicine and Medical Science, UCD Conway Institute, University College Dublin, Belfield, Dublin, Ireland
| | - K Henry
- From the Dept. of Respiratory Medicine, St Vincent's University Hospital and School of Medicine and Medical Science, UCD Conway Institute, University College Dublin, Belfield, Dublin, Ireland
| | - M P Keane
- From the Dept. of Respiratory Medicine, St Vincent's University Hospital and School of Medicine and Medical Science, UCD Conway Institute, University College Dublin, Belfield, Dublin, Ireland
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Prosa T, Olson D, Geiser B, Larson D, Henry K, Steel E. Analysis of implanted silicon dopant profiles. Ultramicroscopy 2013; 132:179-85. [DOI: 10.1016/j.ultramic.2012.10.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Revised: 09/28/2012] [Accepted: 10/20/2012] [Indexed: 10/27/2022]
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Campo R, DeJesus E, Bredeek UF, Henry K, Khanlou H, Logue K, Brinson C, Benson P, Dau L, Wang H, White K, Flaherty J, Fralich T, Guyer B, Piontkowsky D. SWIFT: prospective 48-week study to evaluate efficacy and safety of switching to emtricitabine/tenofovir from lamivudine/abacavir in virologically suppressed HIV-1 infected patients on a boosted protease inhibitor containing antiretroviral regimen. Clin Infect Dis 2013; 56:1637-45. [PMID: 23362296 PMCID: PMC3641864 DOI: 10.1093/cid/cis1203] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 12/07/2012] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND In the United States, emtricitabine/tenofovir disoproxil fumarate (FTC/TDF) is a preferred nucleoside reverse transcriptase inhibitor (NRTI) backbone with lamivudine/abacavir (3TC/ABC) as a commonly used alternative. For patients infected with human immunodeficiency virus (HIV-1) virologically suppressed on a boosted protease inhibitor (PI) + 3TC/ABC regimen, the merits of switching to FTC/TDF as the NRTI backbone are unknown. METHODS SWIFT was a prospective, randomized, open-label 48-week study to evaluate efficacy and safety of switching to FTC/TDF. Subjects receiving 3TC/ABC + PI + ritonavir (RTV) with HIV-1 RNA < 200 c/mL ≥3 months were randomized to continue 3TC/ABC or switch to FTC/TDF. The primary endpoint was time to loss of virologic response (TLOVR) with noninferiority measured by delta of 12%. Virologic failure (VF) was defined as confirmed rebound or the last HIV-1 RNA measurement on study drug ≥200 c/mL. RESULTS In total, 311 subjects were treated in this study (155 to PI + RTV + FTC/TDF, 156 to PI + RTV + 3TC/ABC). Baseline characteristics were similar between the arms: 85% male, 28% black, median age, 46 years; and median CD4 532 cells/mm(3). By TLOVR through week 48, switching to FTC/TDF was noninferior compared to continued 3TC/ABC (86.4% vs 83.3%, treatment difference 3.0% (95% confidence interval, -5.1% to 11.2%). Fewer subjects on FTC/TDF experienced VF (3 vs 11; P = .034). FTC/TDF showed greater declines in fasting low-density lipoproteins (LDL), total cholesterol (TC), and triglycerides (TG) with significant declines in LDL and TC beginning at week 12 with no TC/HDL ratio change. Switching to FTC/TDF showed improved NCEP thresholds for TC and TG and improved 10-year Framingham TC calculated scores. Decreased estimated glomerular filtration rate [corrected] (eGFR) was observed in both arms with a larger decrease in the FTC/TDF arm. CONCLUSIONS Switching to FTC/TDF from 3TC/ABC maintained virologic suppression, had fewer VFs, improved lipid parameters and Framingham scores but decreased eGFR. CLINICALTRIALS.GOV IDENTIFIER: NCT00724711.
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Affiliation(s)
- R Campo
- Department of Infectious Diseases, University of Miami School of Medicine, Miami, FL 33136, USA.
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Cooper DA, Cordery DV, Reiss P, Henry K, Nelson M, O'Hearn M, Reynes J, Arastéh K, Chung J, Rowell L, Guimaraes D, Bertasso A. The effects of enfuvirtide therapy on body composition and metabolic parameters over 48 weeks in the TORO body imaging substudy. HIV Med 2011; 12:31-9. [PMID: 20497250 DOI: 10.1111/j.1468-1293.2010.00845.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The aim of the study was to compare the metabolic and morphological effects of enfuvirtide plus an optimized background (OB) regimen vs. OB alone (control group) in treatment-experienced patients in the T-20 vs. Optimized Regimen Only (TORO) studies. METHODS Body composition and metabolic changes were investigated in patients over 48 weeks, based on fasting chemistries, body weight, and other anthropometric measurements. Dual-energy X-ray absorptiometry (DEXA) and computed tomography (CT) scans were performed in a patient subgroup (n=155) at baseline and at weeks 24 and 48. RESULTS At week 48, mean changes from baseline were similar between treatment groups for glucose, insulin, C-peptide, total cholesterol, low-density lipoprotein (LDL) cholesterol, very low density lipoprotein (VLDL) cholesterol, high-density lipoprotein (HDL) cholesterol and triglyceride levels. The enfuvirtide group experienced a significant increase in body weight [mean change from baseline +0.99 kg; 95% confidence interval (CI) +0.54, +1.44] and, in those who had body scans, there was a significant increase in truncal fat (by DEXA: median change +419.4 g; 95% CI+71.3, +767.5) and total fat [visceral adipose tissue (VAT)+subcutaneous adipose tissue (SAT) by single-slice abdominal CT scan: median change +25.5 cm(2) ; 95% CI+8.9, +42.0] over 48 weeks; significant increases in these parameters were not seen in the control group. There was no significant change in truncal:peripheral fat ratio in either the enfuvirtide or the control group. CONCLUSION The addition of enfuvirtide to an OB regimen does not appear to have unfavourable effects on fat distribution or metabolic parameters.
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Affiliation(s)
- D A Cooper
- National Centre in HIV Epidemiology and Clinical Research, University of New South Wales, Sydney, Australia.
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Maund SJ, Campbell PJ, Giddings JM, Hamer MJ, Henry K, Pilling ED, Warinton JS, Wheeler JR. Ecotoxicology of synthetic pyrethroids. Top Curr Chem (Cham) 2011; 314:137-65. [PMID: 22025065 DOI: 10.1007/128_2011_260] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In this chapter we review the ecotoxicology of the synthetic pyrethroids (SPs). SPs are potent, broad-spectrum insecticides. Their effects on a wide range of nontarget species have been broadly studied, and there is an extensive database available to evaluate their effects. SPs are highly toxic to fish and aquatic invertebrates in the laboratory, but effects in the field are mitigated by rapid dissipation and degradation. Due to their highly lipophilic nature, SPs partition extensively into sediments. Recent studies have shown that toxicity in sediment can be predicted on the basis of equilibrium partitioning, and whilst other factors can influence this, organic carbon content is a key determining variable. At present for SPs, there is no clear evidence for adverse population-relevant effects with an underlying endocrine mode of action. SPs have been studied intensively in aquatic field studies, and their effects under field conditions are mitigated from those measured in the laboratory by their rapid dissipation and degradation. Studies with a range of test systems have shown consistent aquatic field endpoints across a variety of geographies and trophic states. SPs are also highly toxic to bees and other nontarget arthropods in the laboratory. These effects are mitigated in the field through repellency and dissipation of residues, and recovery from any adverse effects tends to be rapid.
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Affiliation(s)
- S J Maund
- Syngenta Crop Protection AG, Basel, Switzerland.
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Mondy KE, Gottdiener J, Overton ET, Henry K, Bush T, Conley L, Hammer J, Carpenter CC, Kojic E, Patel P, Brooks JT. High Prevalence of Echocardiographic Abnormalities among HIV-infected Persons in the Era of Highly Active Antiretroviral Therapy. Clin Infect Dis 2010; 52:378-86. [DOI: 10.1093/cid/ciq066] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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Conley L, Bush T, Darragh T, Palefsky J, Unger E, Patel P, Kojic E, Cu‐Uvin S, Martin H, Overton E, Hammer J, Henry K, Vellozzi C, Wood K, Brooks J. Factors Associated with Prevalent Abnormal Anal Cytology in a Large Cohort of HIV‐Infected Adults in the United States. J Infect Dis 2010; 202:1567-76. [DOI: 10.1086/656775] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [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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Baker J, Quick H, Hullsiek KH, Tracy R, Duprez D, Henry K, Neaton JD. Interleukin-6 and d-dimer levels are associated with vascular dysfunction in patients with untreated HIV infection. HIV Med 2010; 11:608-9. [PMID: 20456504 DOI: 10.1111/j.1468-1293.2010.00835.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Micic S, Hoffmann AA, Strickland G, Weeks AR, Bellati J, Henry K, Nash MA, Umina PA. Pests of germinating grain crops in southern Australia: an overview of their biology and management options. ACTA ACUST UNITED AC 2008. [DOI: 10.1071/ea08153] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Grain crops in southern Australia are subject to attack by countless pests, with greater than 40 invertebrate species threatening seedling establishment. Control tactics for crop establishment pests rely heavily on the application of pesticides, especially in canola, which is the most susceptible crop to invertebrate damage. There is genuine interest in integrated pest management (IPM) among growers, but relatively little adoption of classical IPM in broadacre farming in southern Australia. The driving forces behind the lack of adoption are unknown, although over-reliance on broad-spectrum pesticides – which are inexpensive and often applied prophylactically as a means of negating the need to monitor crops – is undoubtedly a key factor. Recent control failures against important pests due to pesticide resistance, increased restrictions on pesticide applications, environmental concerns about pesticide applications and strong support for grain quality assurance programs by exporters, highlight the need to consider IPM principles as a means of reducing chemical inputs. IPM guidelines for broadacre farming systems are limited in scope and there is a need to develop practical management tools that encompass a whole system approach. This paper provides an overview of the main invertebrate pests affecting crop establishment and identifies gaps hindering the wide-scale adoption of IPM.
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Roback P, Beard J, Baumann D, Gille C, Henry K, Krohn S, Wiste H, Voskuil M, Rainville C, Rutherford R. A predicted operon map for Mycobacterium tuberculosis. Nucleic Acids Res 2007; 35:5085-95. [PMID: 17652327 PMCID: PMC1976454 DOI: 10.1093/nar/gkm518] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The prediction of operons in Mycobacterium tuberculosis (MTB) is a first step toward understanding the regulatory network of this pathogen. Here we apply a statistical model using logistic regression to predict operons in MTB. As predictors, our model incorporates intergenic distance and the correlation of gene expression calculated for adjacent gene pairs from over 474 microarray experiments with MTB RNA. We validate our findings with known examples from the literature and experimentation. From this model, we rank each potential operon pair by the strength of evidence for cotranscription, choose a classification threshold with a true positive rate of over 90% at a false positive rate of 9.1%, and use it to construct an operon map for the MTB genome.
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Affiliation(s)
- P. Roback
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
| | - J. Beard
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
| | - D. Baumann
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
| | - C. Gille
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
| | - K. Henry
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
| | - S. Krohn
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
| | - H. Wiste
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
| | - M.I. Voskuil
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
| | - C. Rainville
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
| | - R. Rutherford
- Department of Mathematics, Statistics and Computer Science, Center for Interdisciplinary Research and Department of Biology St. Olaf College, Northfield MN 55057, Department of Microbiology, University of Colorado Health Sciences Center, Aurora, CO 80045 and Department of Biology, Seattle University, 901 12th Ave, Seattle, WA 98052, USA
- *To whom correspondence should be addressed.+1 206 296 2501+1 206 296 5634
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Ogunsalu C, Daisley H, Henry K, Bedayse S, White K, Jagdeo B, Baldeo S. A new radiological classification for ameloblastoma based on analysis of 19 cases. W INDIAN MED J 2006; 55:434-9. [PMID: 17691241 DOI: 10.1590/s0043-31442006000600013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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: 11/22/2022]
Abstract
OBJECTIVE To describe ameloblastoma of the jawbone in young Jamaicans, with special emphasis on radiological findings, and to introduce a radiological classification which could assist in the categorization of these cases according to their biological behaviour and hence their subsequent surgical and medical management. SUBJECTS AND METHODS The series comprised all the 18 cases of ameloblastoma of the jaw seen in patients under the age of 20 years in the two major hospitals in Jamaica with an oral and maxillofacial surgery department from 1980 to 1995. Radiological and histological diagnosis was confirmed in all. A case of maxillary ameloblastoma in a 13-year old girl seen in the year 2000 was also included in this study. This last case had special attributes. RESULTS All 19 patients had primary lesions of ameloblastoma. The mean age was 16.1 years with a mode of 18 years and a range of 13 to 19 years. The male to female ratio was 1.1:1. Eighteen cases were seen in the mandible and one case in the maxilla. Of these, 42% were unilocular and 58% were multilocular radiologically. Thirty-two per cent of cases had unerupted teeth associated with the lesions and 32% had root resorption. Based on our new radiological classification, the most predominant radiological type was IIb2 with root resorption (42%). There was no radiological type classically simulating dentigerous cyst (Ia2). CONCLUSION Ameloblastoma in young Jamaicans presented more in the adolescent period and are predominantly unicystic and rare in the maxilla. A new classification for ameloblastoma based solely on radiological presentation is adopted.
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Affiliation(s)
- C Ogunsalu
- Oral Diseases Unit, School of Dentistry, Faculty of Medical Sciences, The University of the West Indies, St Augustine, Trinidad and Tobago.
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Abstract
In this study we evaluated the overexpression status of HER-2 and its prognostic significance on survival in patients with thick cutaneous malignant melanoma. The immuno-alkaline phosphatase antigen detection technique was applied to archival diagnostic material from 51 patients with primary lesions measuring >or= 10 mm in Breslow thickness. Eleven additional patients with primary lesions measuring <or= 1 mm were also studied. HER-2 overexpression was evaluated using conventional light microscopy and an automated cellular imaging system (Chromavision Medical System). Fifteen (29.4%) out of 51 patients with thick lesions showed HER-2 overexpression. In contrast, no overexpression was seen in any of the thin lesions. Overexpression of HER-2 in this group of patients was of no prognostic significance for freedom from recurrence or survival when studied using univariate and multivariate analyses. Whilst the incidence of HER-2 overexpression in patients with thick cutaneous primary melanoma is similar to that reported in breast cancer, it was of no prognostic significance for survival in this study. However, further evaluation in larger numbers of patients with the full spectrum of Breslow thickness is clearly indicated.
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Affiliation(s)
- P Eliopoulos
- Melanoma Unit, Directorate of Cancer Services and Haematology, Hammersmith Hospitals NHS Trust, Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK
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Retsas S, Henry K, Mohammed MQ, MacRae K. Prognostic factors of cutaneous melanoma and a new staging system proposed by the American Joint Committee on Cancer (AJCC): validation in a cohort of 1284 patients. Eur J Cancer 2002; 38:511-6. [PMID: 11872343 DOI: 10.1016/s0959-8049(01)00394-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [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: 10/17/2022]
Abstract
This study, involving a cohort of 1284 evaluable patients, validates the American Joint Committee on Cancer (AJCC) proposal for the introduction of ulceration of primary cutaneous melanoma as an independent prognostic factor of survival. In univariate analyses, ulceration (Hazard Ratio (HR) 1.983; P<0.0001; 95% Confidence Intervals (CI) 1.692-2.325) was a predictor of worse overall survival. In multivariate analyses, ulceration (HR 1.302; P=0.022; (95% CI: 1.039-1.633) retained its prognostic significance for survival independent of tumour thickness (HR 1.101; P<0.0001; 95% CI: 1.055-1.150); mitotic activity (HR 1.039; P=0.005; 95% CI: 1.012-1.067); and age (HR 1.009; P=0.006; 95% CI: 1.003-1.016). Ulceration lost its significance in a subgroup analysis of 256 patients with clinically apparent regional lymph node metastases to the number of lymph nodes involved (HR 1.15; P=0.004; 95% CI:1.047-1.263). Ulceration is prognostically significant in the tumour but not the nodal classification of melanoma, with mitotic activity the second most important prognostic factor after tumour thickness.
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Affiliation(s)
- S Retsas
- Melanoma Unit, Directorate of Cancer Services and Haematology, Hammersmith Hospitals NHS Trust, Charing Cross Hospital Campus, W6 8RF, London, UK.
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Sebat F, Johnson D, Moore S, Henry K, Saari M. Crit Care 2002; 6:P246. [DOI: 10.1186/cc1714] [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: 11/10/2022] Open
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Abramovitch R, Freedman JL, Henry K, Van Brunschot M. Children's capacity to agree to psychological research: knowledge of risks and benefits and voluntariness. Ethics Behav 2001; 5:25-48. [PMID: 11654169 DOI: 10.1207/s15327019eb0501_3] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
A series of studies investigated the capacity of children between the ages of 7 and 12 to give free and informed consent to participation in psychological research. Children were reasonably accurate in describing the purpose of studies, but many did not understand the possible benefits or especially the possible risks of participating. In several studies children's consent was not affected by the knowledge that their parents had given their permission or by the parents saying that they would not be upset if the children refused. In contrast, other studies found that children were much more likely to stop their participation if the experimenter said explicitly that she would not be upset if they stopped. We suggest that experimenters should pay more attention to describing the possible risks and benefits of participation in research, and that they should also make it clearer to children that they are free to stop once they have begun.
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Ross L, Scarsella A, Raffanti S, Henry K, Becker S, Fisher R, Liao Q, Hirani A, Graham N, St Clair M, Hernandez J. Thymidine analog and multinucleoside resistance mutations are associated with decreased phenotypic susceptibility to stavudine in HIV type 1 isolated from zidovudine-naive patients experiencing viremia on stavudine-containing regimens. AIDS Res Hum Retroviruses 2001; 17:1107-15. [PMID: 11522180 DOI: 10.1089/088922201316912718] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [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] Open
Abstract
Studies have demonstrated that HIV-1 isolated from subjects experiencing virologic failure on stavudine (d4T)-containing regimens often contains thymidine analog mutations (TAMs), consisting of reverse transcriptase (RT) mutations M41L, D67N, K70R, L210W, T215Y/F, and K219Q/E, previously associated only with zidovudine (ZDV) resistance. In clinical study NZT40012, HIV-1 was isolated from 86 ZDV-naive subjects experiencing viremia on d4T-based therapies (plasma HIV-1 RNA > or =1000 copies/ml) and analyzed to examine the association between RT mutations and phenotypic resistance to d4T. Resistance-associated mutations were analyzed from HIV-1 isolated from 85 subjects. Of these, 24 samples (28%) had TAMs, and 30 samples (35%) had either TAMs and/or the Q151M multinucleoside resistance (MNR) mutation. Phenotypic susceptibility to d4T was determined by two commercially available methods. Statistically significant increases (p < 0.001) in phenotypic fold resistance to d4T were observed in virus with at least one TAM or MNR mutation. However, the mean increases in phenotypic resistance were 4-fold for the Antivirogram assay and 3-fold for the Phenosense HIV assay, only slightly above the levels used to designate decreased susceptibility to d4T. Subjects can experience viremia on d4T-containing regimens with virus exhibiting only small increases in IC(50), suggesting that relatively small changes in viral susceptibility to d4T may influence drug efficacy.
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Affiliation(s)
- L Ross
- Department of Virology, GlaxoSmithKline, Research Triangle Park, North Carolina 27709, USA.
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Ross L, Henry K, Paar D, Salvato P, Shaefer M, Fisher R, Liao Q, St Clair M. Thymidine-analog and multi-nucleoside resistance mutations are observed in both zidovudine-naive and zidovudine-experienced subjects with viremia after treatment with stavudine-containing regimens. J Hum Virol 2001; 4:217-22. [PMID: 11694850] [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] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
OBJECTIVE The type and frequency of mutations in the human immunodeficiency virus type 1 (HIV-1) reverse transcriptase coding region observed in virus from antiretroviral therapy (ART)-experienced, zidovudine (ZDV)-naive subjects receiving stavudine (d4T)-based therapies were compared with mutations observed in virus from ART-experienced subjects with previous ZDV exposure. METHODS Plasma HIV-1 RNA was isolated from 67 ART-experienced subjects. Reverse transcriptase mutations were assessed by sequencing polymerase chain reaction products. RESULTS Thirty-four subjects (51%) were ZDV-experienced (Z(exp)) and 33 (49%) were ZDV-naive and d4T-experienced (d(exp)Z(naive)). Human immunodeficiency virus type 1 from 16 of 33 (48%) d(exp)Z(naive) subjects and from 16 of 34 (47%) Z(exp) subjects had thymidine analog mutations (TAMs). Multi-nucleoside resistance (MNR) mutations were observed in virus from 5 of 33 (15%) d(exp)Z(naive) subjects and 3 of 34 (9%) Z(exp) subjects. At least one TAM or MNR mutation was identified in 18 of 33 (55%) of the former and in 19 of 34 (56%) of the latter group. CONCLUSIONS These results confirm recent reports that TAMs and MNR mutations can arise in subjects receiving d4T-based therapy who are naive with respect to ZDV.
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Affiliation(s)
- L Ross
- Department of Clinical Virology, GlaxoSmithKline, Research Triangle Park, North Carolina 27709, USA.
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Erice A, Li W, Balfour HH, Boies LR, Melroe H, Henry K. Analysis of HIV-1 reverse transcriptase and protease sequences in paired plasma and lymphoid tissue specimens from HIV-1 infected individuals. AIDS 2001; 15:831-6. [PMID: 11399955 DOI: 10.1097/00002030-200105040-00003] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To determine how representative the genotype of HIV-1 circulating in plasma is of the genotype of the virus present in lymphoid tissue. METHODS Paired plasma and tonsillar tissue samples were prospectively obtained from patients with various levels of plasma HIV-1 RNA who were receiving combination antiretroviral therapy. HIV-1 reverse transcriptase and protease sequences were amplified from plasma and lymphoid tissue specimens by nested polymerase chain reaction and analyzed using an automated sequencing system. Results were compared with consensus HIV-1 sequences to determine whether drug-resistance mutations were present in the regions analyzed. RESULTS HIV-1 protease sequences were compared in 11 plasma/tissue pairs obtained from eight patients; HIV reverse transcriptase sequences were compared in 12 plasma/tissue pairs obtained from nine patients. Sequence homology between plasma and tissue RNA, tissue RNA and DNA, and plasma and tissue DNA ranged from 97% to 100%. Few discrepancies were found when the percentage of mutant sequences at resistance codons was compared among paired samples. In most instances, tissue RNA or plasma contained a higher percentage of mutant sequences than did tissue DNA. CONCLUSION The genotype of plasma HIV-1 is similar to the genotype of the virus in lymphoid tissue. Resistance studies using plasma samples should provide accurate information regarding the genotype of HIV-1 in lymphoid tissues.
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Affiliation(s)
- A Erice
- Department of Laboratory Medicine & Pathology, University of Minnesota Medical School, Minneapolis, USA
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Scheithauer BW, Fereidooni F, Horvath E, Kovacs K, Robbins P, Tews D, Henry K, Pernicone P, Gaffrey TA, Meyer FB, Young WF, Fahlbusch R, Buchfelder M, Lloyd RV. Pituitary carcinoma: an ultrastructural study of eleven cases. Ultrastruct Pathol 2001; 25:227-42. [PMID: 11465479 DOI: 10.1080/019131201300343865] [Citation(s) in RCA: 36] [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: 10/17/2022]
Abstract
Pituitary carcinomas are very rare. Defined as adenohypophysial tumors that undergo craniospinal and/or systemic metastasis, most are PRL- or ACTH-producing. Their ultrastructural features, particularly relative to benign adenomas of similar functional type, have not been sufficiently explored. Eleven cases of immunohistochemically characterized pituitary carcinoma with documented cerebrospinal and/or systemic metastases were collected from various institutions and studied by transmission electron microscopy. The tumors were surgically removed from 7 women and 4 men ranging in age between 28 and 74 years (mean, 50 years). All were endocrinologically functioning. Six tumors secreted PRL; three were ACTH-producing; one each was GH/PRL- and TSH-producing. The patients with the ACTH-producing tumors had all presented with Cushing's disease and two of them had undergone adrenalectomy (Nelson syndrome). In most cases significant cellular atypia and mitotic activity were observed. In terms of morphologic features of functional differentiation, electron microscopy revealed that in 9 cases the tumor cells maintained at least some ultrastructural markers of their basic phenotype. A unique feature in 2 ACTH carcinomas was the variable admixture of smooth endoplasmic reticulum with intermediate (cytokeratin) filaments. In 2 cases, both PRL-producing carcinomas, the cell type comprising the tumor could not be identified on an ultrastructural basis alone. Ultrastructural investigation of pituitary carcinomas confirms their endocrine nature and, in most but not all cases, reveals their functional differentiation. Despite the diagnostic utility of electron microscopy in the assessment of these rare tumors, the distinction of pituitary carcinoma from pituitary adenoma cannot be firmly made on ultrastructural grounds alone.
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Affiliation(s)
- B W Scheithauer
- Department of Laboratory Medicine, Mayo Clinic, Rochester, Minnesota, USA
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Baudry K, Swain E, Rahier A, Germann M, Batta A, Rondet S, Mandala S, Henry K, Tint GS, Edlind T, Kurtz M, Nickels JT. The effect of the erg26-1 mutation on the regulation of lipid metabolism in Saccharomyces cerevisiae. J Biol Chem 2001; 276:12702-11. [PMID: 11279045 DOI: 10.1074/jbc.m100274200] [Citation(s) in RCA: 45] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A temperature-sensitive Saccharomyces cerevisiae mutant harboring a lesion in the ERG26 gene has been isolated. ERG26 encodes 4alpha-carboxysterol-C3 dehydrogenase, one of three enzymatic activities required for the conversion of 4,4-dimethylzymosterol to zymosterol. Gas chromatography/mass spectrometry analyses of sterols in this mutant, designated erg26-1, revealed the aberrant accumulation of a 4-methyl-4-carboxy zymosterol intermediate, as well as a novel 4-carboxysterol. Neutral lipid radiolabeling studies showed that erg26-1 cells also harbored defects in the rate of biosynthesis and steady-state levels of mono-, di-, and triglycerides. Phospholipid radiolabeling studies showed defects in the rate of biosynthesis of both phosphatidic acid and phosphatidylinositol. Biochemical studies revealed that microsomes isolated from erg26-1 cells contained greatly reduced 4alpha-carboxysterol-C3 dehydrogenase activity when compared with microsomes from wild type cells. Previous studies have shown that loss of function mutations in either of the fatty acid elongase genes SUR4/ELO3 or FEN1/GNS1/ELO2 can "bypass" the essentiality of certain ERG genes (Ladeveze, V., Marcireau, C., Delourme, D., and Karst, F. (1993) Lipids 28, 907-912; Silve, S., Leplatois, P., Josse, A., Dupuy, P. H., Lanau, C., Kaghad, M., Dhers, C., Picard, C., Rahier, A., Taton, M., Le Fur, G., Caput, D., Ferrara, P., and Loison, G. (1996) Mol. Cell. Biol. 16, 2719-2727). Studies presented here have shown that this sphingolipid-dependent "bypass" mechanism did not suppress the essential requirement for zymosterol biosynthesis. However, studies aimed at understanding the underlying physiology behind the temperature-sensitive growth defect of erg26-1 cells showed that the addition of several antifungal compounds to the growth media of erg26-1 cells could suppress the temperature-sensitive growth defect. Fluorescence microscopic analysis showed that GFP-Erg26p and GFP-Erg27p fusion proteins were localized to the endoplasmic reticulum. Two-hybrid analysis indicated that Erg25p, Erg26p, and Erg27p, which are required for the biosynthesis of zymosterol, form a complex within the cell.
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Affiliation(s)
- K Baudry
- Department of Biochemistry, MCP Hahnemann University, Philadelphia, Pennsylvania 19129, USA
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Verbiest W, Brown S, Cohen C, Conant M, Henry K, Hunt S, Sension M, Stein A, Stryker R, Thompson M, Schel P, Van Den Broeck R, Bloor S, Alcorn T, Van Houtte M, Larder B, Hertogs K. Prevalence of HIV-1 drug resistance in antiretroviral-naive patients: a prospective study. AIDS 2001; 15:647-50. [PMID: 11317005 DOI: 10.1097/00002030-200103300-00017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Tebas P, Henry K, Nease R, Murphy R, Phair J, Powderly WG. Timing of antiretroviral therapy. Use of Markov modeling and decision analysis to evaluate the long-term implications of therapy. AIDS 2001; 15:591-9. [PMID: 11316996 DOI: 10.1097/00002030-200103300-00008] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The timing of initiation of antiretroviral therapy is controversial. Current guidelines are heavily based on the principle of 'hit early, hit hard', although the long-term implications of this approach are unknown. METHODS Using Markov modeling and decision analysis we modeled the virologic outcomes over 10 years in a hypothetical population of 10 000 HIV-infected patients in which therapy (with the possibility of three sequential regimens before the development of multidrug-resistant virus) is started immediately versus starting progressively at rates of 5, 10, 15, 20 or 30% of the original population each year. The model used inputs from available clinical trial data: virologic success rate and durability of the response of the first and subsequent regimens. We performed one-way and two-way sensitivity analysis to evaluate changes in the input variables. RESULTS If therapy is started immediately in all patients, by 10 years 57% would be undetectable, but 38% would have detectable multidrug-resistant virus. In contrast, the population as a whole would have had better virologic outcomes if one waited before starting treatment at any progression rate; for example, initiating therapy in 10% of the subjects per year results in 64% of patients being undetectable and 24% with multidrug-resistant virus. Two-way sensitivity analysis demonstrates that immediate initiation should be at least 15 to 20% better than delayed antiretroviral therapy to justify immediate initiation of therapy over a wide range of success rates of the delayed start. CONCLUSION Our analysis, utilizing optimistic outcomes based on short-term clinical trials, provides a theoretical basis for questioning the current aggressive early use of therapy and should help prompt studies that look at when and how to start antiretroviral therapy.
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Affiliation(s)
- P Tebas
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63108, USA.
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Abstract
BACKGROUND Cutaneous mastocytosis is considered a relatively benign and indolent form of mast cell disease, which either ultimately regresses, remains stable or is only slowly progressive. Previously, it has been purported that no more than 60% of adult patients with cutaneous mastocytosis will have occult bone marrow involvement. OBJECTIVES To investigate the frequency of bone marrow involvement in patients with mastocytosis but without systemic symptoms. METHODS Bone marrow aspirate and trephine biopsy were performed in 13 consecutive patients with cutaneous mastocytosis attending our department. RESULTS All but one of these patients had evidence of bone marrow involvement. Bone marrow cytogenetic abnormalities have been found in patients with cutaneous mastocytosis: all our patients who were analysed showed a normal karyotype. CONCLUSIONS Bone marrow involvement is common in adults with cutaneous mastocytosis.
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Affiliation(s)
- L A Fearfield
- Departments of Dermatology and Haematology, Chelsea and Westminster Hospital, London SW10 9NH, U.K.
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Munro CA, Winter K, Buchan A, Henry K, Becker JM, Brown AJ, Bulawa CE, Gow NA. Chs1 of Candida albicans is an essential chitin synthase required for synthesis of the septum and for cell integrity. Mol Microbiol 2001; 39:1414-26. [PMID: 11251855 DOI: 10.1046/j.1365-2958.2001.02347.x] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.0] [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: 11/20/2022]
Abstract
CaCHS1 of the fungal pathogen Candida albicans encodes an essential chitin synthase that is required for septum formation, viability, cell shape and integrity. The CaCHS1 gene was inactivated by first disrupting one allele using the ura-blaster protocol, then placing the remaining allele under the control of the maltose-inducible, glucose-repressible MRP1 promoter. Under repressing conditions, yeast cell growth continued temporarily, but daughter buds failed to detach from parents, resulting in septumless chains of cells with constrictions defining contiguous compartments. After several generations, a proportion of the distal compartments lysed. The conditional Deltachs1 mutant also failed to form primary septa in hyphae; after several generations, growth stopped, and hyphae developed swollen balloon-like features or lysed at one of a number of sites including the hyphal apex and other locations that would not normally be associated with septum formation. CHS1 therefore synthesizes the septum of both yeast and hyphae and also maintains the integrity of the lateral cell wall. The conditional mutant was avirulent under repressing conditions in an experimental model of systemic infection. Because this gene is essential in vitro and in vivo and is not present in humans, it represents an attractive target for the development of antifungal compounds.
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Affiliation(s)
- C A Munro
- Department of Molecular and Cell Biology, University of Aberdeen, Aberdeen AB25 2ZD, UK
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Abstract
AIMS Classic erythroleukaemia (acute myeloid leukaemia M6, or M6 AML) is defined as an excess of myeloblasts in an erythroid predominant background. Leukaemia variants in which the primitive blast cells are demonstrably erythroid are extremely rare and poorly characterised. Variably referred to as "true erythroleukaemia" or "acute erythremic myelosis", they are often included within the M6 AML category even though they do not meet strict criteria for this type of AML. METHODS Two cases of acute erythroid neoplasia are presented with clinical, morphological, immunophenotypic, and cytogenetic analysis. RESULTS Both patients presented with profound anaemia, one in a setting of long standing myelodysplasia. Bone marrow examination revealed a predominant population of highly dysplastic erythroid cells in both cases. In one case, the liver was infiltrated by neoplastic erythroid cells. Both patients died within four months of diagnosis. CONCLUSIONS This report illustrates that cases of acute leukaemia occur in which the dominant neoplastic cell is a primitive erythroid cell without an accompanying increase in myeloblasts. This does not preclude the neoplastic clone originating in a multipotent haemopoietic stem cell, as suggested by cases arising in patients with myelodysplasia. Acute erythremic myelosis should be recognised as a distinct variant of M6 AML.
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Affiliation(s)
- R P Hasserjian
- Department of Histopathology, Hammersmith Hospitals NHS Trust, London, UK.
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Abstract
Shiatsu, a specific type of massage, was used as an intervention in this study of 66 individuals complaining of lower back pain. Each individual was measured on state/trait anxiety and pain level before and after four shiatsu treatments. Each subject was then called 2 days following each treatment and asked to quantify the level of pain. Both pain and anxiety decreased significantly over time. Extraneous variables such as gender, age, gender of therapist, length of history with lower back pain, and medications taken for lower back pain did not alter the significant results. These subjects would recommend shiatsu massage for others suffering from lower back pain and indicated the treatments decreased the major inconveniences they experienced with their lower back pain.
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Henry K, Wallace RJ, Bellman PC, Norris D, Fisher RL, Ross LL, Liao Q, Shaefer MS. Twice-daily triple nucleoside intensification treatment with lamivudine-zidovudine plus abacavir sustains suppression of human immunodeficiency virus type 1: results of the TARGET Study. J Infect Dis 2001; 183:571-8. [PMID: 11170982 DOI: 10.1086/318527] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [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: 06/14/2000] [Revised: 11/08/2000] [Indexed: 11/03/2022] Open
Abstract
This open-label, multicenter, single-arm clinical trial assessed the 48-week efficacy of a twice-daily triple nucleoside reverse-transcriptase inhibitor regimen containing a lamivudine (150 mg)-zidovudine (300 mg) combination tablet (COM) and abacavir (ABC; 300 mg) in 87 antiretroviral therapy-experienced, protease inhibitor-naive patients infected with human immunodeficiency virus type 1 (HIV-1). At baseline, the median plasma HIV-1 RNA level was 3.10 log(10) copies/mL, and the median CD4 cell count was 506 cells/mm(3). An intent-to-treat&rcolon;observed analysis showed that, at weeks 24 and 48 of treatment, HIV-1 RNA level was <400 copies/mL in 48 (76%) of 63 and 45 (82%) of 55 patients, respectively, and <50 copies/mL in 37 (59%) of 63 and 31 (56%) of 55 patients, respectively. Previous zidovudine or lamivudine use and presence at baseline of the M184V reverse-transcriptase mutation did not impact virologic response. Median CD4 cell counts were maintained above baseline throughout the study. COM plus ABC was generally well tolerated.
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Affiliation(s)
- K Henry
- Regions Hospital, 640 Jackson St. Suite 125, St. Paul, Minnesota 55101, USA.
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Henry K. Lessons about AIDS and the circle of life. Minn Med 2001; 84:10-2. [PMID: 11242968] [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] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Affiliation(s)
- K Henry
- HIV Programs, Regions Hospital, St. Paul
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Henry K. Risky behaviors with asymptomatic HIV infection? Postgrad Med 2001; 109:124. [PMID: 11272688 DOI: 10.3810/pgm.2001.02.865] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- K Henry
- HIV Program Regions Hospital, St Paul, Minnesota, USA
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Kakuda TN, Page LM, Anderson PL, Henry K, Schacker TW, Rhame FS, Acosta EP, Brundage RC, Fletcher CV. Pharmacological basis for concentration-controlled therapy with zidovudine, lamivudine, and indinavir. Antimicrob Agents Chemother 2001; 45:236-42. [PMID: 11120972 PMCID: PMC90267 DOI: 10.1128/aac.45.1.236-242.2001] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Conventional antiretroviral therapy involves administration of standard fixed doses to adults and adolescents. This approach ignores interindividual variability in pharmacokinetics and results in substantial differences in systemic concentrations among patients. Thus, variability in systemic concentrations contributes to variability in response to therapy. This study was designed to evaluate the feasibility and safety of a regimen of zidovudine, lamivudine, and indinavir designed to achieve select target concentrations versus standard dose therapy. Twenty-four antiretroviral-naïve subjects completed the 24-week study; 13 received standard therapy, and 11 received concentration-controlled therapy. There were no differences in baseline characteristics. Oral clearance for all three drugs was not different between weeks 2 and 28; average ratios of week 2 oral clearance to week 28 oral clearance were 0.95, 1.09, and 1.06 for zidovudine, lamivudine, and indinavir, respectively, with 95% confidence intervals including 1. The selected target concentrations were average steady-state concentrations of 0.19 mg/liter for zidovudine and 0.44 mg/liter for lamivudine and a trough concentration of 0.15 mg/liter for indinavir; mean concentrations achieved at week 28 in the concentration-controlled arm were 0.20, 0.54, and 0.19 mg/liter, respectively. Concentration-controlled therapy significantly reduced interpatient variability in zidovudine concentrations and significantly increased indinavir concentrations. There was no difference in adverse drug effects or adherence. This investigation has provided a pharmacologic basis for concentration-controlled therapy by demonstrating that it is feasible and has a safety profile no different from that of standard therapy. Additional studies to evaluate the virologic effect of the concentration-controlled approach to antiretroviral therapy are warranted.
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Affiliation(s)
- T N Kakuda
- Departments of Experimental and Clinical Pharmacology, University of Minnesota Academic Health Sciences Center, St. Paul, Minnesota 55455, USA
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Henry K, Hicks C. Antiretroviral rounds. Reason to be worried. AIDS Clin Care 2000; 12:82-3. [PMID: 12211167] [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: 02/26/2023]
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Anderson PL, Noormohamed SE, Henry K, Brundage RC, Balfour HH, Fletcher CV. Semen and serum pharmacokinetics of zidovudine and zidovudine-glucuronide in men with HIV-1 infection. Pharmacotherapy 2000; 20:917-22. [PMID: 10939552 DOI: 10.1592/phco.20.11.917.35263] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
STUDY OBJECTIVE To characterize the concentration-time profiles of zidovudine and zidovudine-glucuronide in semen and serum of men infected with the human immunodeficiency-1 virus (HIV-1). DESIGN Open-label observational study. SETTING University-affiliated teaching hospital and research center. PATIENTS Four asymptomatic HIV-1-infected men. INTERVENTIONS Zidovudine administration was followed by an 8-hour intensive pharmacokinetic study on day 1. Over the next 8 days, a dose administration and timed single-sample strategy was employed to determine serum and semen concentration time profiles simultaneously. MEASUREMENTS AND MAIN RESULTS Zidovudine and zidovudine-glucuronide concentrations were uniformly higher in semen than in serum except at 1 hour after the dose. The median area under the curve ratio (semen AUC0-48:serum AUC0-infinity) was 3.31 for zidovudine and 15.04 for zidovudine-glucuronide. CONCLUSION Zidovudine and zidovudine-glucuronide reach high levels in seminal plasma relative to serum. The virologic, pharmacodynamic, and public health implications of distribution to this compartment require further study.
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Affiliation(s)
- P L Anderson
- Department of Experimental and Clinical Pharmacology, University of Minnesota Academic Health Sciences Center, Minneapolis, USA
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Henry K. HAART and medical management: the realities of clinical care. Interview with Keith Henry, M.D. Interview by John S. James. AIDS Treat News 2000:2-8. [PMID: 12870447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
In many outpatient HIV clinics the medical staff is so poorly funded that over 95% of the cost of patient care goes to drugs and laboratory tests--and less than 5% to physicians, nurses, other staff, clinic overhead, medical records, patient education, adherence monitoring, and other costs of care. This misdirection of resources results in patients not receiving the professional time and attention they need, and drug being taken incorrectly, leading to unnecessary drug failure and other medical problems. Keith Henry, M.D., who recently called for more cautious use of antiretroviral therapy, describes the realities of inadequate funding for medical care, and some needed steps for improvement. Also, we asked him to explain how his clinic has consistently performed leading-edge research without the major funding usually available at research institutions.
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