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Black C, Kanczler JM, de Andrés MC, White LJ, Savi FM, Bas O, Saifzadeh S, Henkel J, Zannettino A, Gronthos S, Woodruff MA, Hutmacher DW, Oreffo ROC. Characterisation and evaluation of the regenerative capacity of Stro-4+ enriched bone marrow mesenchymal stromal cells using bovine extracellular matrix hydrogel and a novel biocompatible melt electro-written medical-grade polycaprolactone scaffold. Biomaterials 2020; 247:119998. [PMID: 32251928 PMCID: PMC7184676 DOI: 10.1016/j.biomaterials.2020.119998] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 03/20/2020] [Accepted: 03/20/2020] [Indexed: 12/15/2022]
Abstract
Many skeletal tissue regenerative strategies centre around the multifunctional properties of bone marrow derived stromal cells (BMSC) or mesenchymal stem/stromal cells (MSC)/bone marrow derived skeletal stem cells (SSC). Specific identification of these particular stem cells has been inconclusive. However, enriching these heterogeneous bone marrow cell populations with characterised skeletal progenitor markers has been a contributing factor in successful skeletal bone regeneration and repair strategies. In the current studies we have isolated, characterised and enriched ovine bone marrow mesenchymal stromal cells (oBMSCs) using a specific antibody, Stro-4, examined their multipotential differentiation capacity and, in translational studies combined Stro-4+ oBMSCs with a bovine extracellular matrix (bECM) hydrogel and a biocompatible melt electro-written medical-grade polycaprolactone scaffold, and tested their bone regenerative capacity in a small in vivo, highly vascularised, chick chorioallantoic membrane (CAM) model and a preclinical, critical-sized ovine segmental tibial defect model. Proliferation rates and CFU-F formation were similar between unselected and Stro-4+ oBMSCs. Col1A1, Col2A1, mSOX-9, PPARG gene expression were upregulated in respective osteogenic, chondrogenic and adipogenic culture conditions compared to basal conditions with no significant difference between Stro-4+ and unselected oBMSCs. In contrast, proteoglycan expression, alkaline phosphatase activity and adipogenesis were significantly upregulated in the Stro-4+ cells. Furthermore, with extended cultures, the oBMSCs had a predisposition to maintain a strong chondrogenic phenotype. In the CAM model Stro-4+ oBMSCs/bECM hydrogel was able to induce bone formation at a femur fracture site compared to bECM hydrogel and control blank defect alone. Translational studies in a critical-sized ovine tibial defect showed autograft samples contained significantly more bone, (4250.63 mm3, SD = 1485.57) than blank (1045.29 mm3, SD = 219.68) ECM-hydrogel (1152.58 mm3, SD = 191.95) and Stro-4+/ECM-hydrogel (1127.95 mm3, SD = 166.44) groups. Stro-4+ oBMSCs demonstrated a potential to aid bone repair in vitro and in a small in vivo bone defect model using select scaffolds. However, critically, translation to a large related preclinical model demonstrated the complexities of bringing small scale reported stem-cell material therapies to a clinically relevant model and thus facilitate progression to the clinic.
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Affiliation(s)
- C Black
- Bone & Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Human Development & Health, Institute of Developmental Sciences, University of Southampton, SO16 6YD, UK
| | - J M Kanczler
- Bone & Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Human Development & Health, Institute of Developmental Sciences, University of Southampton, SO16 6YD, UK
| | - M C de Andrés
- Bone & Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Human Development & Health, Institute of Developmental Sciences, University of Southampton, SO16 6YD, UK; Cartilage Epigenetics Group, Rheumatology Division, Biomedical Research Institute of A Coruña (INIBIC), Hospital Universitario de A Coruña-CHUAC, 15006 A Coruña ,Spain
| | - L J White
- School of Pharmacy, Biodiscovery Institute, University Park, University of Nottingham, Nottingham, NG7 2RD, UK
| | - F M Savi
- ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; Institute of Health Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia
| | - O Bas
- ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; Institute of Health Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia
| | - S Saifzadeh
- ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia
| | - J Henkel
- ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia
| | - A Zannettino
- Myeloma Research Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia and Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, Australia and Central Adelaide Local Health Network, Adelaide, South Australia, Australia
| | - S Gronthos
- Mesenchymal Stem Cell Laboratory, Adelaide Medical School, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide, Australia and Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, Australia
| | - M A Woodruff
- ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia
| | - D W Hutmacher
- ARC Industrial Transformation Training Centre in Additive Biomanufacturing, Queensland University of Technology (QUT), Brisbane, QLD, 4059, Australia; Institute of Health Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia
| | - R O C Oreffo
- Bone & Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Human Development & Health, Institute of Developmental Sciences, University of Southampton, SO16 6YD, UK; College of Biomedical Engineering, China Medical University, Taichung, 40402, Taiwan.
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2
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Letko A, Ammann B, Jagannathan V, Henkel J, Leuthard F, Schelling C, Carneiro M, Drögemüller C, Leeb T. A deletion spanning the promoter and first exon of the hair cycle-specific ASIP transcript isoform in black and tan rabbits. Anim Genet 2019; 51:137-140. [PMID: 31729778 DOI: 10.1111/age.12881] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 08/19/2019] [Revised: 10/08/2019] [Accepted: 10/25/2019] [Indexed: 01/01/2023]
Abstract
Black and tan animals have tan-coloured ventral body surfaces separated by sharp boundaries from black-coloured dorsal body surfaces. In the at mouse mutant, a retroviral 6 kb insertion located in the hair cycle-specific promoter of the murine Asip gene encoding agouti signalling protein causes the black and tan phenotype. In rabbits, three ASIP alleles are thought to exist, including an at allele causing a black and tan coat colour that closely resembles the mouse black and tan phenotype. The goal of our study was to identify the functional genetic variant causing the rabbit at allele. We performed a WGS-based comparative analysis of the ASIP gene in one black and tan and three wt agouti-coloured rabbits. The analysis identified 75 at -associated variants including an 11 kb deletion. The deletion is located in the region of the hair cycle-specific ASIP promoter and thus in a region homologous to the site of the retroviral insertion causing the at allele in mice. We observed perfect association of the genotypes at this deletion with the coat colour phenotype in 49 rabbits. The comparative analysis and the previous knowledge about the regulation of ASIP expression suggest that the 11 kb deletion is the most likely causative variant for the black and tan phenotype in rabbits.
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Affiliation(s)
- A Letko
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland
| | - B Ammann
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland
| | - V Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland.,Dermfocus, University of Bern, 3001, Bern, Switzerland
| | - J Henkel
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland.,Dermfocus, University of Bern, 3001, Bern, Switzerland
| | - F Leuthard
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland.,Dermfocus, University of Bern, 3001, Bern, Switzerland
| | - C Schelling
- Vetsuisse Faculty, Clinic for Reproductive Medicine and Center of Clinical Studies, University of Zurich, 8315, Lindau, Switzerland
| | - M Carneiro
- CIBIO/InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Vairão, 4485-661, Portugal.,Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto, 4169-007, Portugal
| | - C Drögemüller
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland.,Dermfocus, University of Bern, 3001, Bern, Switzerland
| | - T Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland.,Dermfocus, University of Bern, 3001, Bern, Switzerland
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Hug P, Jude R, Henkel J, Jagannathan V, Leeb T. A novel
KIT
deletion variant in a German Riding Pony with white‐spotting coat colour phenotype. Anim Genet 2019; 50:761-763. [DOI: 10.1111/age.12840] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2019] [Indexed: 11/28/2022]
Affiliation(s)
- P. Hug
- Institute of Genetics, Vetsuisse Faculty University of Bern Bern 3001 Switzerland
- DermFocus University of Bern Bern 3001 Switzerland
| | - R. Jude
- RJC Weilerswist 53919 Germany
| | - J. Henkel
- Institute of Genetics, Vetsuisse Faculty University of Bern Bern 3001 Switzerland
- DermFocus University of Bern Bern 3001 Switzerland
| | - V. Jagannathan
- Institute of Genetics, Vetsuisse Faculty University of Bern Bern 3001 Switzerland
- DermFocus University of Bern Bern 3001 Switzerland
| | - T. Leeb
- Institute of Genetics, Vetsuisse Faculty University of Bern Bern 3001 Switzerland
- DermFocus University of Bern Bern 3001 Switzerland
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Henkel J, Lafayette C, Brooks SA, Martin K, Patterson-Rosa L, Cook D, Jagannathan V, Leeb T. Whole-genome sequencing reveals a large deletion in the MITF gene in horses with white spotted coat colour and increased risk of deafness. Anim Genet 2019; 50:172-174. [PMID: 30644113 DOI: 10.1111/age.12762] [Citation(s) in RCA: 19] [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] [Accepted: 12/12/2018] [Indexed: 01/18/2023]
Abstract
White spotting phenotypes in horses are highly valued in some breeds. They are quite variable and may range from the common white markings up to completely white horses. EDNRB, KIT, MITF, PAX3 and TRPM1 represent known candidate genes for white spotting phenotypes in horses. For the present study, we investigated an American Paint Horse family segregating a phenotype involving white spotting and blue eyes. Six of eight horses with the white-spotting phenotype were deaf. We obtained whole-genome sequence data from an affected horse and specifically searched for structural variants in the known candidate genes. This analysis revealed a heterozygous ~63-kb deletion spanning exons 6-9 of the MITF gene (chr16:21 503 211-21 566 617). We confirmed the breakpoints of the deletion by PCR and Sanger sequencing. PCR-based genotyping revealed that all eight available affected horses from the family carried the deletion. The finding of an MITF variant fits well with the syndromic phenotype involving both depigmentation and an increased risk for deafness and corresponds to human Waardenburg syndrome type 2A. Our findings will enable more precise genetic testing for depigmentation phenotypes in horses.
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Affiliation(s)
- J Henkel
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland.,DermFocus, University of Bern, 3001, Bern, Switzerland
| | | | - S A Brooks
- Department of Animal Sciences, University of Florida, Gainesville, FL, 32611-0910, USA
| | - K Martin
- Etalon Inc., Menlo Park, CA, 94025, USA
| | - L Patterson-Rosa
- Department of Animal Sciences, University of Florida, Gainesville, FL, 32611-0910, USA
| | - D Cook
- Etalon Inc., Menlo Park, CA, 94025, USA
| | - V Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland.,DermFocus, University of Bern, 3001, Bern, Switzerland
| | - T Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001, Bern, Switzerland.,DermFocus, University of Bern, 3001, Bern, Switzerland
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Klauder J, Camargo R, Henkel J, Püschel G. Hyperinsulinämie und der Teufelskreis der Entzündung. DIABETOL STOFFWECHS 2017. [DOI: 10.1055/s-0037-1601730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- J Klauder
- Universität Potsdam, Institut für Ernährungswissenschaft, Biochemie der Ernährung, Nuthetal OT Rehbrücke, Germany
| | - R Camargo
- Universität São Paulo, Institut der Biomedizin, Zell- und Entwicklungsbiologie, São Paulo, Brazil
| | - J Henkel
- Universität Potsdam, Institut für Ernährungswissenschaft, Biochemie der Ernährung, Nuthetal OT Rehbrücke, Germany
| | - G Püschel
- Universität Potsdam, Institut für Ernährungswissenschaft, Biochemie der Ernährung, Nuthetal OT Rehbrücke, Germany
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6
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Berner A, Henkel J, Woodruff MA, Saifzadeh S, Kirby G, Zaiss S, Gohlke J, Reichert JC, Nerlich M, Schuetz MA, Hutmacher DW. Scaffold-cell bone engineering in a validated preclinical animal model: precursors vs differentiated cell source. J Tissue Eng Regen Med 2015; 11:2081-2089. [PMID: 26648044 DOI: 10.1002/term.2104] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 09/08/2015] [Accepted: 10/05/2015] [Indexed: 01/09/2023]
Abstract
The properties of osteoblasts (OBs) isolated from the axial skeleton (tOBs) differ from OBs of the orofacial skeleton (mOBs) due to the different embryological origins of the bones. The aim of the study was to assess and compare the regenerative potential of allogenic bone marrow-derived mesenchymal progenitor cells with allogenic tOBs and allogenic mOBs in combination with a mPCL-TCP scaffold in critical-sized segmental bone defects in sheep tibiae. After 6 months, the tibiae were explanted and underwent biomechanical testing, micro-computed tomography (microCT) and histological and immunohistochemical analyses. Allogenic MPCs demonstrated a trend towards a better outcome in biomechanical testing and the mean values of newly formed bone. Biomechanical, microCT and histological analysis showed no significant differences in the bone regeneration potential of tOBs and mOBs in our in vitro study, as well as in the bone regeneration potential of different cell types in vivo. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- A Berner
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia.,Department of Trauma Surgery, University of Regensburg, Germany
| | - J Henkel
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - M A Woodruff
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - S Saifzadeh
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - G Kirby
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - S Zaiss
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia.,Department of Trauma Surgery, University of Regensburg, Germany
| | - J Gohlke
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - J C Reichert
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia.,Department of Orthopaedics and Accident Surgery, Waldkrankenhaus Protestant Hospital, Berlin, Germany
| | - M Nerlich
- Department of Trauma Surgery, University of Regensburg, Germany
| | - M A Schuetz
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - D W Hutmacher
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
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Abstract
The alpha-factor has the greatest impact on the calculation of the required standard oxygen transfer rate (SOTR) in activated sludge systems equipped with submerged aeration systems. Knowing the dependencies of the alpha-factor leads to a better design of the aeration devices and, consequently, to a more efficient use of aeration energy. Applying the current state of knowledge about oxygen transfer leads to the conclusion that, in contrast to current opinion, simultaneous aerobic stabilization requires the same SOTR as conventional activated sludge systems with advanced nutrient removal, even though a higher organic load is degraded.
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Affiliation(s)
- J Henkel
- Institut IWAR, Technische Universität Darmstadt, Petersenstrasse 13, 64287 Darmstadt, Germany.
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8
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Affiliation(s)
- M. Humberstone
- The University of Tennessee, Nuclear Engineering DepartmentKnoxville, Tennessee 37996-2300
| | - B. Wood
- The University of Tennessee, Nuclear Engineering DepartmentKnoxville, Tennessee 37996-2300
| | - J. Henkel
- The University of Tennessee, Nuclear Engineering DepartmentKnoxville, Tennessee 37996-2300
| | - J. W. Hines
- The University of Tennessee, Nuclear Engineering DepartmentKnoxville, Tennessee 37996-2300
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Sonntag U, Henkel J, Renneberg B, Bockelbrink A, Braun V, Heintze C. Counseling overweight patients: analysis of preventive encounters in primary care. Int J Qual Health Care 2010; 22:486-92. [PMID: 20956283 DOI: 10.1093/intqhc/mzq060] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE The increasing prevalence of obesity requires particularly primary care providers to take action. The aim of this study was to analyze general practitioners (GPs) encounters with overweight and obese patients in primary care to test the hypothesis that patients with a BMI ≥ 30 kg/m² would have longer consultations focusing on lifestyle-related issues like nutrition and physical activity than those with a BMI < 30 kg/m². DESIGN Cross sectional comparison of audiotaped encounters of patients with a BMI ≥ 30 kg/m² and those with a BMI < 30 kg/m². SETTING Twelve GP surgeries in Berlin, Germany. PARTICIPANTS Fifty patients who agreed to have preventive check-up encounters audiotaped. MAIN OUTCOME MEASURES Based on the Roter Interaction ANALYSIS System (RIAS) we assessed duration of encounter and the prevalence of GP statements regarding cardiovascular risks, nutrition and physical activity. RESULTS An increased BMI was found to be a predictor for the length of encounters (P = 0.01), whereas the content of talks was mainly determined by the individual of GP and sex of the GP. Statements regarding cardiovascular risks were most frequent, followed by those regarding nutrition and physical activity. In this study the assessed physiological parameters were not associated with the specific contents of preventive encounters like nutrition or physical activity (P > 0.05). CONCLUSIONS Our results indicate that GPs rarely use the check-up program to conduct lifestyle consultations with obese patients. Barriers to lifestyle counseling and possible solutions are discussed with a view to promoting individualized and target management of overweight patients.
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Affiliation(s)
- U Sonntag
- Institute for General Practice and Family Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany.
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10
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Zonca P, Brenig F, Henkel J, Jacobi CA. [Our experience with free hand camera]. Rozhl Chir 2010; 89:188-193. [PMID: 20514915] [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: 05/29/2023]
Abstract
AIM The evaluation of the contribution of Free Hand camera to laparoscopic resection of colon sigmoideum in clinical praxis. MATERIAL AND METHOD Free Hand camera is an automatic camera system controlled by a surgeon. In the prospective-retrospective trial we have compared two groups of 20 patients together. In the first group there were patients with laparoscopic resection of colon sigmoideum with the Free hand camera usage and in the second group there were patients with laparoscopic resection of colon sigmoideum with a human assistant. We evaluated the length of surgery and surgeon's comfort. The intraoperative data of both of the patient groups were compared with the usage of physiological and operative score (POSSUM). RESULTS The length of surgery in the group with the human assistant and Free Hand camera were 149, and 161 minutes respectively. There is no statistically significant difference in the length of surgery (p = 0.05) in both of the groups. The surgeon in both of the patient groups evaluated the operative view and comfort as good. CONCLUSION The pilot study has shown the usability of Free Hand in praxis. The daily usage of Free Hand camera is possible in elective as well as acute surgeries after managing of the learning curve.
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Affiliation(s)
- P Zonca
- Zentrum für Viszeral und Minimal Invasive Chirurgie, Wesseling, Koln am Rhein, Nemecko, Chefarzt.
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11
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Hesse D, Hommel A, Zahn C, Augustin R, Henkel J, Püschel GP, Joost HG, Schürmann A. Die GTPase ARFRP1 ist essentiell für die Differenzierung der Hepatozyten und die Etablierung eines störungsfreien Glucosestoffwechsels. DIABETOL STOFFWECHS 2009. [DOI: 10.1055/s-0029-1221804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Hesse D, Hommel A, Zahn C, Augustin R, Henkel J, Püschel GP, Joost HG, Schürmann A. Veränderungen im Glucosemetabolismus nach leberspezifischer Deletion der GTPase ARFRP1 in der Maus. DIABETOL STOFFWECHS 2008. [DOI: 10.1055/s-2008-1076261] [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: 10/21/2022]
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Henkel J, Du H, Yang P, Qyang Y, Kansra S, Ko M, Kim HW, Marcus S. Bob1, a Gim5/MM-1/Pfd5 homolog, interacts with the MAP kinase kinase Byr1 to regulate sexual differentiation in the fission yeast, Schizosaccharomyces pombe. Differentiation 2001; 67:98-106. [PMID: 11683500 DOI: 10.1046/j.1432-0436.2001.670402.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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]
Abstract
The MAPKK Byr1 is an essential component of a Ras-dependent MAPK module required for sexual differentiation in the fission yeast, Schizosaccharomyces pombe. Here we describe the genetic and molecular characterization of a highly conserved protein, Bob1, which was identified from a two-hybrid screen for Byr1-interacting proteins. Byrl and Bobl proteins coprecipitate from S. pombe cell lysates, and both proteins localize to the tips and septa of S. pombe cells. S. pombe bob1 null (bob1delta) mutants lack obvious growth defects but exhibit a significant mating deficiency, which can be suppressed by overexpression of Byrl. Overexpression of Bob1 also leads to inhibition of mating in S. pombe, and this defect is likewise suppressed by Byrl overexpression. Bob1 is highly homologous in structure to the mammalian MM-1/Pfd5 and budding yeast Gim5/Pfd5-Sc proteins, which have been implicated as regulators of actin and tubulins. Similar to budding yeast gim5/pfd5-Sc mutants, S. pombe bob1delta cells have cytoskeletal defects, as judged by hypersensitivity to cytoskeletal disrupting drugs. byr1delta mutants do not share this characteristic with bob1delta mutants, and byr1delta bob1delta mutants are not significantly more sensitive to cytoskeletal disrupting drugs than cells carrying only the bob1delta mutation. Taken together, our results suggest that Bob1 has Byr1-related function(s) required for proper mating response of S. pombe cells and Byrl-independent function(s) required for normal cytoskeletal control. We show that the human MM-1/Pfd5 protein can substitute for its counterpart in fission yeast, providing evidence that the functions of Bob1-related proteins have been highly conserved through evolution. Our results lead us to propose that Bob1-related proteins may play diverse roles in eukaryotic organisms.
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Affiliation(s)
- J Henkel
- Department of Molecular Genetics, University of Texas M.D. Anderson Cancer Center, Houston 77030, USA
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Bao S, Qyang Y, Yang P, Kim H, Du H, Bartholomeusz G, Henkel J, Pimental R, Verde F, Marcus S. The highly conserved protein methyltransferase, Skb1, is a mediator of hyperosmotic stress response in the fission yeast Schizosaccharomyces pombe. J Biol Chem 2001; 276:14549-52. [PMID: 11278267 DOI: 10.1074/jbc.c100096200] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [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: 11/06/2022] Open
Abstract
The p21-activated kinase, Shk1, is required for cell viability, establishment and maintenance of cell polarity, and proper mating response in the fission yeast, Schizosaccharomyces pombe. Previous genetic studies suggested that a presumptive protein methyltransferase, Skb1, functions as a positive modulator of Shk1. However, unlike Shk1, Skb1 is not required for viability or mating of S. pombe cells and contributes only modestly to the regulation of cell morphology under normal growth conditions. Here we demonstrate that Skb1 plays a more significant role in regulating cell growth and polarity under conditions of hyperosmotic stress. We provide evidence that the inability of skb1Delta cells to properly maintain cell polarity in hyperosmotic conditions results from inefficient subcellular targeting of F-actin. We show that Skb1 localizes to cell ends, sites of septation, and nuclei of S. pombe cells. Hyperosmotic shock results in substantial delocalization of Skb1 from cell ends and nuclei, as well as stimulation of Skb1 protein methyltransferase activity. Taken together, our results demonstrate a new role for Skb1 as a mediator of hyperosmotic stress response in fission yeast. We show that the protein methyltransferase activity of the human Skb1 homolog, Skb1Hs, is also stimulated by hyperosmotic stress in fission yeast, providing evidence for evolutionary conservation of a role for Skb1-related proteins as mediators of hyperosmotic stress response, as well as mechanisms involved in regulating this novel class of protein methyltransferases.
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Affiliation(s)
- S Bao
- Department of Molecular Genetics and the Graduate Program in Genes and Development, University of Texas, M. D. Anderson Cancer Center, Houston, Texas 77030, USA
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Abstract
We recently demonstrated the effectiveness of dorsal foraminotomy in lateral herniated cervical disc after 1 year follow-up in a prospective study.(1) The goal of this paper is to confirm these results concerning long term outcome. We carried out a prospective, consecutive study on 54 patients, operated on for lateral herniated cervical disc. We analysed demographic data, the case history, the neurological examination on admission and imaging data. Ninety per cent were followed up for 3.5 years postoperatively. According to their ratings on a pain scale the group were divided into favourable and unfavourable outcomes. These groups were analysed in relation to the patient's initial condition. At follow up, 90% of patients showed complete recovery or improvement. A long standing preoperative neurological deficit seems to be an important prognostic factor for unfavourable long term outcome after cervical foraminotomy.
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Affiliation(s)
- C Woertgen
- Department of Neurosurgery, University of Regensburg, Franz-Josef-Strauss-Allee 11, Regensburg, D-93042, Germany
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Henkel J. Soy. Health claims for soy protein, questions about other components. FDA Consum 2000; 34:13-5, 18-20. [PMID: 11521249] [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: 02/21/2023]
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Henkel J. It's convenient and private, but beware of 'rogue sites'. FDA Consum 2000; 34:24-9. [PMID: 10732497] [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: 02/15/2023]
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18
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Henkel J. Sugar substitutes. Americans opt for sweetness and lite. FDA Consum 1999; 33:12-6. [PMID: 10628311] [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: 02/15/2023]
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19
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Henkel J. Sales of contaminated animal drugs halted. FDA Consum 1999; 33:34. [PMID: 10522171] [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: 04/13/2023]
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20
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Henkel J. Imported fruit blamed for rare typhoid outbreak. FDA Consum 1999; 33:36-7. [PMID: 10443181] [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: 04/13/2023]
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21
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Henkel J. Attacking AIDS with a 'cocktail' therapy? FDA Consum 1999; 33:12-7. [PMID: 10443176] [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: 02/13/2023]
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22
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Henkel J. Orphan drug law matures into medical mainstay. FDA Consum 1999; 33:29-32. [PMID: 10443187] [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: 02/13/2023]
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23
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Henkel J. Food firm gets huge fine for tainted strawberry harvest. FDA Consum 1999; 33:37-8. [PMID: 10214123] [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: 02/12/2023]
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24
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Henkel J. Hepatitis C. New treatment helps some, but cure remains elusive. FDA Consum 1999; 33:23-9. [PMID: 10214120] [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: 02/12/2023]
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25
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Henkel J. Keeping cholesterol under control. FDA Consum 1999; 33:23-7. [PMID: 10030143] [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: 02/10/2023]
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26
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Henkel J. Juice maker fined record amount for E. coli-tainted product. FDA Consum 1999; 33:34-5. [PMID: 10030145] [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: 02/10/2023]
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27
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Henkel J. MedWatch. FDA's 'heads up' on medical product safety. FDA Consum 1998; 32:10-2, 15. [PMID: 9854445] [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: 02/09/2023]
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28
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Henkel J. Crab company cleans house. FDA Consum 1998; 32:33-5. [PMID: 9854450] [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: 02/09/2023]
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29
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Henkel J. E-mail, snail mail, phone, or fax. Reporting adverse reactions and other product problems. FDA Consum 1998; 32:7-9. [PMID: 9854444] [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: 02/09/2023]
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30
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Henkel J. Crab processor shut down for sanitary violations. FDA Consum 1998; 32:38-9. [PMID: 9779012] [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: 02/09/2023]
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31
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Henkel J. Prostate cancer. FDA Consum 1998; 32:22-7. [PMID: 9779009] [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: 02/09/2023]
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32
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Henkel J. Parkinson's disease. New treatments slow onslaught of symptoms. FDA Consum 1998; 32:13-8. [PMID: 9684562] [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: 02/08/2023]
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33
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Henkel J. Irradiation: a safe measure for safer food. FDA Consum 1998; 32:12-7. [PMID: 9613246] [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: 02/07/2023]
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34
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Henkel J. New success against stroke. Prevention, improved therapies help fight this devastating condition. FDA Consum 1998; 32:12-6. [PMID: 9532950] [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: 02/07/2023]
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35
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Henkel J. Court halts company's use of unapproved product from Russia. FDA Consum 1998; 32:37. [PMID: 9532955] [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: 02/07/2023]
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36
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Henkel J. Drugs of the deep. Treasures of the sea yield some medical answers and hint at others. FDA Consum 1998; 32:30-33. [PMID: 9508548] [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: 05/22/2023]
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37
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Henkel J. Probe proves effective against antibiotic smuggling scheme. FDA Consum 1998; 32:36-8. [PMID: 9508550] [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: 02/06/2023]
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38
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Vidal MI, Stiene M, Henkel J, Bilitewski U, Costa JV, Oliva AG. A solid-phase enzyme linked immunosorbent assay using monoclonal antibodies, for the detection of African swine fever virus antigens and antibodies. J Virol Methods 1997; 66:211-8. [PMID: 9255732 DOI: 10.1016/s0166-0934(97)00059-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 02/05/2023]
Abstract
An improved solid-phase enzyme linked immunosorbent assay (ELISA) using monoclonal antibodies was developed to detect an African swine fever virus protein (VP73) in pig samples. The use of monoclonal antibodies against VP73 allowed a sensitive and specific sandwich ELISA. This assay detected a limiting antigen concentration of 0.05 microgram/ml of VP73, lower than the detection limit of 0.6 microgram/ml obtained by using polyclonal antibodies by the same ELISA. The whole virus particle was detected with this method to a limit of 2.3 x 10(2) PFU/ml. At the same time, an indirect ELISA was developed to detect ASFV antibodies. The results also indicate that this method may be a useful technique for epidemiological surveys.
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Affiliation(s)
- M I Vidal
- Instituto de Biologia Experimental e Tecnologica (IBET)/Instituto de Tecnologia Quimica e Biológica (ITQB), Universidade Nova de Lisboa, Oeiras, Portugal.
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Rebhandl W, Paya K, Felberbauer FX, Fuchs R, Henkel J, Bieglmayer C, Horcher E. Tissue polypeptide-specific antigen (TPS) in pediatric malignancies. Anticancer Res 1997; 17:2865-8. [PMID: 9329549] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Tissue Polypeptide Specific Antigen (TPS) may soon be routinely used as a proliferation marker in adult epithelial tumors. So far, no data have been available on normal or pathologic TPS values in children. Therefore the present study was designed to test the marker for the first time in pediatric malignancies. Using a commercial ELISA kit (Beki Diagnostics), serum TPS levels were determined in 270 healthy children and compared with various benign (n = 143) and malignant (n = 58) diseases. In healthy children, we found an age-dependent distribution of TPS values. Median (M) TPS was found to be 105.05 U/l at birth as determined from umbilical cord blood (n = 96). By the end of the first week, the value rose to M = 164 U/l and then continuously decreased with age until reaching the adult level at around 14 years. Patients with benign masses (n = 29) did not show elevated serum TPS in contrast to children with malignancies. Advanced tumor stage, metastases, and low dignity correlated with an increase in serum values. In many cases, chemotherapy and especially surgical resection of the tumor were followed by a decrease of the previously markedly elevated TPS levels. Severe infections and impaired renal function were however related with very high values and this must be taken into account when judging the validity of TPS measurements. The marker appears useful for the differential diagnosis between benign and malignant processes. While previous investigators described its use exclusively in epithelial tumors of adults, we cannot confirm this specifity in pediatric patients: Our data show that elevated TPS values in children can also be observed in nonepithelial tumors.
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Affiliation(s)
- W Rebhandl
- Division of Pediatric Surgery, University of Vienna Medical School, Austria
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Adams B, Henkel J. Public affairs specialists. FDA's walking encyclopedias. FDA Consum 1995; 29:22-6. [PMID: 10142361] [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: 02/11/2023]
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41
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Henkel J. Safeguarding human tissue transplants. FDA Consum 1994; 28:9-13. [PMID: 10139008] [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: 02/11/2023]
Abstract
Transplants of human tissues, such as cornea and bone, can be modern miracles. But they can also transmit disease such as HIV and hepatitis. FDA has tightened controls of transplanted human tissue to minimize risks, and is considering additional action.
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Gehling H, Leppek R, Künneke M, Gotzen L, Giannadakis K, Henkel J. [Is prevention of thromboembolism in ambulatory and conservative therapy of rupture of the fibular ligament of the upper ankle joint necessary?]. Unfallchirurg 1994; 97:362-5. [PMID: 7939738] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In a prospective clinical study, 111 outpatients with tears of the lateral ankle ligaments were investigated for the occurrence of deep venous thrombosis (DVT). All patients had been treated by a plaster cast for 1 week and had not received any form of DVT prophylaxis. After removal of the plaster cast (mean 7.1 days), colour flow imaging of the veins of the injured leg was performed. A phlebography was undertaken whenever there was any suspicion of DVT. Risk factors for thrombosis [3, 10] were documented in all patients. Besides injury and immobilisation, a median of 1.2 (0-4) risk factors for DVT was involved. Only 31 patients had no additional risk factors at all. Median age of the patients was 26.1 years (16-53 median range). Only 1 patient over 40 years of age was diagnosed as having DVT, and none under 40. Therefore, medicamentous prophylaxis of DVT is not considered necessary in outpatients younger than 40 years with ankle ligament tears treated by bi-valved casts in cases when there are no additional risk factors (Table 4) for DVT.
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Affiliation(s)
- H Gehling
- Zentrum für operative Medizin I, Klinik für Unfallchirurgie, Philipps-Universität Marburg
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Henkel J. User fees to fund faster reviews. FDA Consum 1993; 27:19-21. [PMID: 10129049] [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: 04/12/2023]
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45
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Abstract
An atypical form of herpes simplex encephalitis produced by HSV-1 documented in the present article demonstrates that (1) prominent EEG abnormality may correlate with subtle increase in signal intensity on MRI; (2) the disease may start with prominent involvement of the cingulate gyri; and (3) viral infection of the brainstem may cause early onset of severe neurologic dysfunction and coma.
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Affiliation(s)
- J W Rose
- Neurovirology Research Laboratory, Veterans Affairs Medical Center, Salt Lake City, UT 84148
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Henkel J, Hock B. Clinostatic rotation decreases crossover frequencies in the fungus Sordaria macrospora Auersw. Microgravity Sci Technol 1991; 4:267-272. [PMID: 11541861] [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: 05/23/2023]
Abstract
Two-factor crosses between the non-allelic spore colour mutants r2 and lu of the fungus Sordaria macrospora were used to investigate the effect of clinostatic rotation (= simulated weightlessness) on crossover frequencies. The experiment was carried out with different rotary directions at a rotary rate of 4 rpm. Second-division segregations of the gene lu, which result from crossover between the gene locus and centromere, are significantly smaller in the clinostat experiments than in the static controls. No differences were found between the two rotary directions. A similar influence of clinostatic rotation was not observed for the gene r2 which in contrast to the lu locus is located very close to the centromere. The suitability of this approach for the investigation of the effect of space flight conditions on cytogenetic processes is pointed out.
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Affiliation(s)
- J Henkel
- Max-Planck-Institut fur Biochemie, Abt. Sanger, Martinsried, Germany
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Zielke A, Nies C, Henkel J, Klotter HJ, Rothmund M. [Management of pancreatic rupture]. Chirurg 1991; 62:694-8. [PMID: 1748027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- A Zielke
- Klinik für Allgemeinchirurgie, Klinikum der Philipps-Universität Marburg
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Henkel J. Referral tracking system shows accurate bottom-line assessment. Comput Healthc 1990; 11:23-4, 26. [PMID: 10108212] [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: 02/11/2023]
Abstract
Rose Medical Center in Denver, Colo., needed a way to track referrals from its many offsite care centers to determine their impact on revenue. Programmers at Rose developed a microbased system, eventually bought by SMS, that measures profitability against investment to become a true decision support tool for hospital executives.
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