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Ferdinandus J, Müller H, Damaschin C, Jacob AS, Meissner J, Krasniqi F, Mey U, Schöndube D, Thiemer J, Mathas S, Zijlstra J, Greil R, Feuring-Buske M, Markova J, Rüffer JU, Kobe C, Eich HT, Baues C, Fuchs M, Borchmann P, Behringer K. Impact of individualized treatment on recovery from fatigue and return to work in survivors of advanced-stage Hodgkin's lymphoma: results from the randomized international GHSG HD18 trial. Ann Oncol 2024; 35:276-284. [PMID: 38061428 DOI: 10.1016/j.annonc.2023.11.014] [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: 09/18/2023] [Revised: 11/01/2023] [Accepted: 11/29/2023] [Indexed: 01/21/2024] Open
Abstract
BACKGROUND Persisting cancer-related fatigue impairs health-related quality of life (HRQoL) and social reintegration in patients with Hodgkin's lymphoma (HL). The GHSG HD18 trial established treatment de-escalation for advanced-stage HL guided by positron emission tomography after two cycles (PET-2) as new standard. Here, we investigate the impact of treatment de-escalation on long-term HRQoL, time to recovery from fatigue (TTR-F), and time to return to work (TTR-W). PATIENTS AND METHODS Patients received European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire C30 (EORTC QLQ-C30) and life situation questionnaires at baseline, interim, end of treatment, and yearly follow-up. TTR-F was defined as time from the end of chemotherapy until the first fatigue score <30. TTR-W was analyzed in previously working or studying patients and measured from the end of treatment until the first documented work or education. We compared duration of treatment on TTR-F and TTR-W using Cox proportional hazards regression adjusted for confounding variables. RESULTS HRQoL questionnaires at baseline were available in 1632 (83.9%) of all randomized patients. Overall, higher baseline fatigue and age were significantly associated with longer TTR-F and TTR-W and male sex with shorter TTR-W. Treatment reduction from eight to four chemotherapy cycles led to a significantly shorter TTR-F [hazard ratio (HR) 1.41, P = 0.008] and descriptively shorter TTR-W (HR 1.24, P = 0.084) in PET-2-negative patients. Reduction from six to four cycles led to non-significant but plausible intermediate accelerations. The addition of rituximab caused significantly slower TTR-F (HR 0.70, P = 0.0163) and TTR-W (HR 0.64, P = 0.0017) in PET-2-positive patients. HRQoL at baseline and age were the main determinants of 2-year HRQoL. CONCLUSIONS Individualized first-line treatment in patients with advanced-stage HL considerably shortens TTR-F and TTR-W in PET-2-negative patients. Our results support the use of response-adapted shortened treatment duration for patients with HL.
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Affiliation(s)
- J Ferdinandus
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Medical Faculty and University Hospital Cologne, Cologne; German Hodgkin Study Group (GHSG), Cologne.
| | - H Müller
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Medical Faculty and University Hospital Cologne, Cologne; German Hodgkin Study Group (GHSG), Cologne
| | - C Damaschin
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Medical Faculty and University Hospital Cologne, Cologne; German Hodgkin Study Group (GHSG), Cologne
| | - A S Jacob
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Medical Faculty and University Hospital Cologne, Cologne; German Hodgkin Study Group (GHSG), Cologne
| | - J Meissner
- Department of Internal Medicine V, University of Heidelberg, Heidelberg, Germany
| | - F Krasniqi
- Medical Oncology, University Hospital of Basel, Basel; Swiss Group for Clinical Cancer Research, Bern
| | - U Mey
- Swiss Group for Clinical Cancer Research, Bern; Oncology and Hematology, Kantonsspital Graubuenden, Chur, Switzerland
| | - D Schöndube
- Department of Oncology and Hematology, Helios Klinikum Bad Saarow, Bad Saarow
| | - J Thiemer
- Department of Hematology and Oncology, Klinikum der Philipps-Universität Marburg, Marburg
| | - S Mathas
- Charité-Universitätsmedizin Berlin, Hematology, Oncology and Tumor Immunology, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin; Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Group Biology of Malignant Lymphomas, Berlin; Experimental and Clinical Research Center (ECRC), a cooperation between the MDC and the Charité, Berlin, Germany
| | - J Zijlstra
- Department of Hematology, Amsterdam UMC, Vrije Universiteit Amsterdam, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - R Greil
- Illrd Medical Department, Paracelsus Medical University, Salzburg; Salzburg Cancer Research Institute and AGMT, Salzburg, Austria
| | - M Feuring-Buske
- Department of Internal Medicine III, University Hospital of Ulm, Ulm, Germany
| | - J Markova
- Department of Internal Medicine-Hematology, University Hospital Kralovske Vinohrady, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | | | - C Kobe
- German Hodgkin Study Group (GHSG), Cologne; Department of Nuclear Medicine, University Hospital of Cologne, Cologne
| | - H-T Eich
- German Hodgkin Study Group (GHSG), Cologne; Department of Radiotherapy, University Hospital of Muenster, Muenster
| | - C Baues
- German Hodgkin Study Group (GHSG), Cologne; Department of Radiooncology, Marienhospital Herne, Ruhr University Bochum, Bochum, Germany
| | - M Fuchs
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Medical Faculty and University Hospital Cologne, Cologne; German Hodgkin Study Group (GHSG), Cologne
| | - P Borchmann
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Medical Faculty and University Hospital Cologne, Cologne; German Hodgkin Study Group (GHSG), Cologne
| | - K Behringer
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Medical Faculty and University Hospital Cologne, Cologne; German Hodgkin Study Group (GHSG), Cologne
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Yokoya K, Jacob AS, Zettler LW, Kendon JP, Menon M, Bell J, Rajaovelona L, Sarasan V. Fungal Diversity of Selected Habitat Specific Cynorkis Species (Orchidaceae) in the Central Highlands of Madagascar. Microorganisms 2021; 9:microorganisms9040792. [PMID: 33920122 PMCID: PMC8069969 DOI: 10.3390/microorganisms9040792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/02/2021] [Accepted: 04/05/2021] [Indexed: 12/17/2022] Open
Abstract
About 90% of Cynorkis species are endemic to the biodiversity hotspot of Madagascar. This terrestrial habitat-specific genus received little study for fungal diversity to support conservation. We evaluated the diversity of culturable fungi of 11 species and soil characteristics from six sites spanning a >40 km radius in and along the region’s inselbergs. Peloton-forming fungi were grown in vitro from root/protocorm slices and positively identified using DNA sequencing. The fungal diversity was then correlated with soil pH, NO3-N, P, and K. All species harbored either putative mycorrhizal associates in the Rhizoctonia complex or Hypocreales fungi. Tulasnella Operational Taxonomic Units (OTUs) were most prevalent in all soil types while Serendipita OTUs were found in species inhabiting granite/rock outcrops in moist soil (seepage areas). Most Cynorkis species were present in soil with low NO3-N and P levels with diversity of mycorrhizal fungi inversely correlated to NO3-N levels. Of the different orchid life stages sampled, only one species (Cynorkis fastigiata) yielded putative mycorrhizal fungi from juvenile stages. As diversity of mycorrhizal fungi of Cynorkis spp. was negatively correlated with NO3-N, and majority of the studied taxa were found in soils with low NO3-N and P contents, reintroduction studies must include analysis of N and P in detail. For the first time, we showed that the assemblage of culturable fungi in the roots of habitat-specific species of Cynorkis (Orchidaceae) are intimately tied to specific soil characteristics.
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Affiliation(s)
- Kazutomo Yokoya
- Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, UK; (K.Y.); (A.S.J.); (J.P.K.); (J.B.); (L.R.)
| | - Alison S. Jacob
- Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, UK; (K.Y.); (A.S.J.); (J.P.K.); (J.B.); (L.R.)
| | | | - Jonathan P. Kendon
- Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, UK; (K.Y.); (A.S.J.); (J.P.K.); (J.B.); (L.R.)
| | - Manoj Menon
- Department of Geography, University of Sheffield, Sheffield S10 2TN, UK;
| | - Jake Bell
- Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, UK; (K.Y.); (A.S.J.); (J.P.K.); (J.B.); (L.R.)
| | - Landy Rajaovelona
- Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, UK; (K.Y.); (A.S.J.); (J.P.K.); (J.B.); (L.R.)
| | - Viswambharan Sarasan
- Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, UK; (K.Y.); (A.S.J.); (J.P.K.); (J.B.); (L.R.)
- Correspondence:
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Kendon JP, Yokoya K, Zettler LW, Jacob AS, McDiarmid F, Bidartondo MI, Sarasan V. Recovery of mycorrhizal fungi from wild collected protocorms of Madagascan endemic orchid Aerangis ellisii (B.S. Williams) Schltr. and their use in seed germination in vitro. Mycorrhiza 2020; 30:567-576. [PMID: 32535694 PMCID: PMC7410863 DOI: 10.1007/s00572-020-00971-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 06/02/2020] [Indexed: 05/27/2023]
Abstract
Orchid mycorrhizal fungi (OMF) are critical for seed germination and maintaining natural populations of orchids, yet the degree of specificity of most orchids to their mycorrhizal associates remains unknown. Many orchids are at risk of extinction, whether generalists or specialists, but orchid species of narrow fungal specificity are arguably under increased threat due to their requirement for specific fungal symbionts. This study characterises the fungi associated with Aerangis ellisii, a lithophytic orchid from a site in the Central Highlands of Madagascar. Culturable OMF isolated from spontaneous protocorms of this species from the wild were used for seed germination. In vitro germination and seedling development of A. ellisii were achieved with fungi derived from A. ellisii and an isolate from a different Aerangis species 30 km away. The significance of these findings and their importance to conservation strategies for this species and other Aerangis spp. is discussed. These results have important implications for the conservation of A. ellisii populations in Madagascar.
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Affiliation(s)
| | | | - Lawrence W Zettler
- Department of Biology, Illinois College, 1101West College Avenue, Jacksonville, IL, 62650, USA
| | - Alison S Jacob
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3DS, UK
| | - Faye McDiarmid
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3DS, UK
| | - Martin I Bidartondo
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3DS, UK
- Faculty of Natural Sciences, Department of Life Sciences, Silwood Park, Imperial College London, London, UK
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Hoysted GA, Jacob AS, Kowal J, Giesemann P, Bidartondo MI, Duckett JG, Gebauer G, Rimington WR, Schornack S, Pressel S, Field KJ. Mucoromycotina Fine Root Endophyte Fungi Form Nutritional Mutualisms with Vascular Plants. Plant Physiol 2019; 181:565-577. [PMID: 31358684 PMCID: PMC6776871 DOI: 10.1104/pp.19.00729] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 07/22/2019] [Indexed: 05/23/2023]
Abstract
Fungi and plants have engaged in intimate symbioses that are globally widespread and have driven terrestrial biogeochemical processes since plant terrestrialization >500 million years ago. Recently, hitherto unknown nutritional mutualisms involving ancient lineages of fungi and nonvascular plants have been discovered, although their extent and functional significance in vascular plants remain uncertain. Here, we provide evidence of carbon-for-nitrogen exchange between an early-diverging vascular plant (Lycopodiella inundata) and Mucoromycotina (Endogonales) fine root endophyte fungi. Furthermore, we demonstrate that the same fungal symbionts colonize neighboring nonvascular and flowering plants. These findings fundamentally change our understanding of the physiology, interrelationships, and ecology of underground plant-fungal symbioses in modern terrestrial ecosystems by revealing the nutritional role of Mucoromycotina fungal symbionts in vascular plants.
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Affiliation(s)
- Grace A Hoysted
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Alison S Jacob
- Comparative Plant & Fungal Biology, Royal Botanic Gardens, Kew, Richmond TW9 3DS, United Kingdom
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Jill Kowal
- Department of Life Sciences, Natural History Museum, London SW7 5BD, United Kingdom
| | - Philipp Giesemann
- Laboratory of Isotope Biogeochemistry, Bayreuth Center of Ecology and Environmental Research, University of Bayreuth, 95440 Bayreuth, Germany
| | - Martin I Bidartondo
- Comparative Plant & Fungal Biology, Royal Botanic Gardens, Kew, Richmond TW9 3DS, United Kingdom
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Jeffrey G Duckett
- Department of Life Sciences, Natural History Museum, London SW7 5BD, United Kingdom
| | - Gerhard Gebauer
- Laboratory of Isotope Biogeochemistry, Bayreuth Center of Ecology and Environmental Research, University of Bayreuth, 95440 Bayreuth, Germany
| | - William R Rimington
- Comparative Plant & Fungal Biology, Royal Botanic Gardens, Kew, Richmond TW9 3DS, United Kingdom
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, United Kingdom
- Department of Life Sciences, Natural History Museum, London SW7 5BD, United Kingdom
| | - Sebastian Schornack
- Sainsbury Laboratory, University of Cambridge, Cambridge, CB2 1LR, United Kingdom
| | - Silvia Pressel
- Department of Life Sciences, Natural History Museum, London SW7 5BD, United Kingdom
| | - Katie J Field
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom
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Jacob AS, Andersen LO, Bitar PP, Richards VP, Shah S, Stanhope MJ, Stensvold CR, Clark CG. Blastocystis Mitochondrial Genomes Appear to Show Multiple Independent Gains and Losses of Start and Stop Codons. Genome Biol Evol 2016; 8:3340-3350. [PMID: 27811175 PMCID: PMC5203790 DOI: 10.1093/gbe/evw255] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Complete mitochondrion-related organelle (MRO) genomes of several subtypes (STs) of the unicellular stramenopile Blastocystis are presented. Complete conservation of gene content and synteny in gene order is observed across all MRO genomes, comprising 27 protein coding genes, 2 ribosomal RNA genes, and 16 transfer RNA (tRNA) genes. Despite the synteny, differences in the degree of overlap between genes were observed between subtypes and also between isolates within the same subtype. Other notable features include unusual base-pairing mismatches in the predicted secondary structures of some tRNAs. Intriguingly, the rps4 gene in some MRO genomes is missing a start codon and, based on phylogenetic relationships among STs, this loss has happened twice independently. One unidentified open reading frame (orf160) is present in all MRO genomes. However, with the exception of ST4 where the feature has been lost secondarily, orf160 contains variously one or two in-frame stop codons. The overall evidence suggests that both the orf160 and rps4 genes are functional in all STs, but how they are expressed remains unclear.
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Affiliation(s)
- Alison S Jacob
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.,Present address: Faculty of Natural Sciences, Imperial College, London, United Kingdom
| | - Lee O'Brien Andersen
- Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark
| | - Paulina Pavinski Bitar
- Department of Population Medicine and Diagnostic Sciences, Cornell College of Veterinary Medicine, Cornell University, Ithaca, NY
| | - Vincent P Richards
- Department of Population Medicine and Diagnostic Sciences, Cornell College of Veterinary Medicine, Cornell University, Ithaca, NY.,Present address: Department of Biological Sciences, College of Agriculture, Forestry and Life Sciences, Clemson University, Clemson, SC
| | - Sarah Shah
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Michael J Stanhope
- Department of Population Medicine and Diagnostic Sciences, Cornell College of Veterinary Medicine, Cornell University, Ithaca, NY
| | - C Rune Stensvold
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom.,Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark
| | - C Graham Clark
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
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Jacob AS, Busby EJ, Levy AD, Komm N, Clark CG. Expanding the Entamoeba Universe: New Hosts Yield Novel Ribosomal Lineages. J Eukaryot Microbiol 2015; 63:69-78. [PMID: 26130044 DOI: 10.1111/jeu.12249] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 06/24/2015] [Accepted: 06/24/2015] [Indexed: 11/30/2022]
Abstract
Removing the requirement for cell culture has led to a substantial increase in the number of lineages of Entamoeba recognized as distinct. Surveying the range of potential host species for this parasite genus has barely been started and it is clear that additional sampling of the same host in different locations often identifies additional diversity. In this study, using small subunit ribosomal RNA gene sequencing, we identify four new lineages of Entamoeba, including the first report of Entamoeba from an elephant, and extend the host range of some previously described lineages. In addition, examination of microbiome data from a number of host animals suggests that substantial Entamoeba diversity remains to be uncovered.
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Affiliation(s)
- Alison S Jacob
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, United Kingdom
| | - Eloise J Busby
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, United Kingdom
| | - Abigail D Levy
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, United Kingdom
| | - Natasha Komm
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, United Kingdom
| | - C Graham Clark
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, United Kingdom
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Jacob AS, Simon OR, Wheatle D, Ruddock P, McCook K. Antihistamine Effect of a Pure Bioactive Compound Isolated from Slug (Diplosolenodes occidentalis) Material. W INDIAN MED J 2014; 63:401-7. [PMID: 25781274 PMCID: PMC4655704 DOI: 10.7727/wimj.2013.269] [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: 10/08/2013] [Accepted: 02/24/2014] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Folklore claims of the therapeutic effect of garden slug (Diplosolenodes occidentalis) extract used to relieve bronchoconstriction in asthmatic individuals were never validated scientifically. The aim of this study was to isolate the pure bioactive compound from slug extract causing this effect. METHODS The crude ground material was prepared in ethanol and after filtration, separation by flash column chromatography method was done. The structure was elucidated by data from hydrogen and carbon nuclear magnetic resonance (NMR) profiles. The bioactive compound was assessed for dose-dependent response effects on guinea pig tracheal smooth muscle pre-contracted with histamine. Receptor specificity studies were done by using HTMT dimaleate (H1 agonist). The type of antagonism was also identified. RESULTS The pure component isolated from garden slug material was identified by spectral studies as glyceryl trilinolenate (GT). It caused dose-dependent relaxation in guinea pig tracheal smooth muscle strips pre-contracted with histamine, it acted via H1 type receptors and showed non-competitive antagonism. CONCLUSION Glyceryl trilinolenate produced dose-dependent relaxation in tracheal smooth muscle strips in the presence of the agonist histamine. Glyceryl trilinolenate displayed non-competitive antagonism at H1 receptors in the trachea. This agent was able to alleviate bronchoconstriction in individuals presenting with atopic asthma in rural agricultural areas in Jamaica (verbal communications). It is possible that GT can be useful therapeutically to produce tracheal smooth muscle relaxation in individuals presenting with atopic asthma.
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Affiliation(s)
- A S Jacob
- Department of Basic Medical Sciences, Pharmacology Section, The University of the West Indies, Kingston 7, Jamaica.
| | - O R Simon
- Department of Basic Medical Sciences, Pharmacology Section, The University of the West Indies, Kingston 7, Jamaica
| | - D Wheatle
- Department of Chemistry, The University of the West Indies, Kingston 7, Jamaica
| | - P Ruddock
- Department of Chemistry, The University of the West Indies, Kingston 7, Jamaica
| | - K McCook
- Department of Chemistry, The University of the West Indies, Kingston 7, Jamaica
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Alfellani MA, Taner-Mulla D, Jacob AS, Imeede CA, Yoshikawa H, Stensvold CR, Clark CG. Genetic diversity of blastocystis in livestock and zoo animals. Protist 2013; 164:497-509. [PMID: 23770574 DOI: 10.1016/j.protis.2013.05.003] [Citation(s) in RCA: 249] [Impact Index Per Article: 22.6] [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: 02/15/2013] [Revised: 04/27/2013] [Accepted: 05/01/2013] [Indexed: 11/30/2022]
Abstract
Blastocystis is a common unicellular anaerobic eukaryote that inhabits the large intestine of many animals worldwide, including humans. The finding of Blastocystis in faeces in mammals and birds has led to proposals of zoonotic potential and that these hosts may be the source of many human infections. Blastocystis is, however, a genetically diverse complex of many distinct organisms (termed subtypes; STs), and sampling to date has been limited, both geographically and in the range of hosts studied. In order to expand our understanding of host specificity of Blastocystis STs, 557 samples were examined from various non-primate animal hosts and from a variety of different countries in Africa, Asia and Europe. STs were identified using 'barcoding' of the small subunit rRNA gene using DNA extracted either from culture or directly from faeces. The host and geographic range of several STs has thereby been greatly expanded and the evidence suggests that livestock is not a major contributor to human infection. Two new STs were detected among the barcode sequences obtained; for these, and for three others where the data were incomplete, the corresponding genes were fully sequenced and phylogenetic analysis was undertaken.
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Affiliation(s)
- Mohammed A Alfellani
- Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK
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Jacob AS. Use of right-sided heart catheters during coronary angioplasty. Am J Cardiol 1989; 63:1540. [PMID: 2524963 DOI: 10.1016/0002-9149(89)90035-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Jacob AS, Goldbaum TS, Pichard AD, Lindsay J. Use of pulmonary artery pressure and pacing catheter during PTCA. Cathet Cardiovasc Diagn 1986; 12:64-5. [PMID: 2937538 DOI: 10.1002/ccd.1810120116] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A balloon-tipped pacing catheter capable of monitoring pulmonary artery pressure and providing standby right ventricular pacing was used in 20 percutaneous transluminal coronary angioplasties (PTCAs), without complication. The catheter was easily inserted in all cases (mean 85 sec) and achieved satisfactory pacing threshold in 17 patients (mean 7.5 ma). The design of this catheter theoretically reduces the risk of right ventricular perforation and tamponade, which may be increased during PTCA.
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Jacob AS, Lindsay J. Intravenous beta blockade in acute myocardial infarction. Am J Cardiol 1985; 55:622. [PMID: 3969927 DOI: 10.1016/0002-9149(85)90289-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Jacob AS, Nielsen DH, Gianelly RE. Fatal ventricular fibrillation following verapamil in Wolff-Parkinson-White syndrome with atrial fibrillation. Ann Emerg Med 1985; 14:159-60. [PMID: 3970402 DOI: 10.1016/s0196-0644(85)81080-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A 29-year-old man with Wolff-Parkinson-White syndrome and atrial fibrillation developed fatal ventricular fibrillation shortly after receiving intravenous verapamil. The patient presented with an irregular pulse of 190. A total of 23 mg of verapamil was administered in small intravenous doses over 35 minutes. The ventricular rate accelerated as verapamil was administered, and fatal ventricular fibrillation followed. Three theoretical mechanisms by which verapamil may enhance conduction of atrial fibrillation in Wolff-Parkinson-White syndrome, predisposing to ventricular fibrillation, are mentioned.
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Goldbaum TS, Jacob AS, Smith DF, Pichard A, Lindsay J. Cardiac tamponade following percutaneous transluminal coronary angioplasty: four case reports. Cathet Cardiovasc Diagn 1985; 11:413-6. [PMID: 2931179 DOI: 10.1002/ccd.1810110410] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Percutaneous transluminal coronary angioplasty (PTCA) has had complications related to dilating catheters and guide wires such as coronary artery dissection, spasm, rupture, and perforation. This report describes four patients who developed cardiac tamponade following PTCA, presumably from right ventricular (RV) perforation. All four received large doses of heparin during PTCA and three received antiplatelet therapy. In three cases, cardiac tamponade occurred several hours after PTCA. All patients did well following operative intervention and no patient required repair of a cardiac perforation. We postulate that impaired hemostasis in the presence of an otherwise inconsequential RV perforation causes tamponade. Three alternatives to provide standby pacing are proposed.
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Jacob AS, Schweiger MJ. A method for inserting two catheters, pulmonary arterial and temporary pacing, through a single puncture into a subclavian vein. Cathet Cardiovasc Diagn 1983; 9:611-615. [PMID: 6661775 DOI: 10.1002/ccd.1810090612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A method for inserting two catheters into a subclavian vein, using a single puncture, is described. Ten patients are reported in whom pulmonary arterial and temporary pacing catheters were inserted by this method. Similar techniques are discussed.
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