1
|
Nadolski A, Vieira JD, Sobrin JA, Kofman AM, Ade PAR, Ahmed Z, Anderson AJ, Avva JS, Basu Thakur R, Bender AN, Benson BA, Bryant L, Carlstrom JE, Carter FW, Cecil TW, Chang CL, Cheshire JR, Chesmore GE, Cliche JF, Cukierman A, de Haan T, Dierickx M, Ding J, Dutcher D, Everett W, Farwick J, Ferguson KR, Florez L, Foster A, Fu J, Gallicchio J, Gambrel AE, Gardner RW, Groh JC, Guns S, Guyser R, Halverson NW, Harke-Hosemann AH, Harrington NL, Harris RJ, Henning JW, Holzapfel WL, Howe D, Huang N, Irwin KD, Jeong O, Jonas M, Jones A, Korman M, Kovac J, Kubik DL, Kuhlmann S, Kuo CL, Lee AT, Lowitz AE, McMahon J, Meier J, Meyer SS, Michalik D, Montgomery J, Natoli T, Nguyen H, Noble GI, Novosad V, Padin S, Pan Z, Paschos P, Pearson J, Posada CM, Quan W, Rahlin A, Riebel D, Ruhl JE, Sayre JT, Shirokoff E, Smecher G, Stark AA, Stephen J, Story KT, Suzuki A, Tandoi C, Thompson KL, Tucker C, Vanderlinde K, Wang G, Whitehorn N, Yefremenko V, Yoon KW, Young MR. Broadband, millimeter-wave antireflection coatings for large-format, cryogenic aluminum oxide optics. Appl Opt 2020; 59:3285-3295. [PMID: 32400613 DOI: 10.1364/ao.383921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 02/25/2020] [Indexed: 06/11/2023]
Abstract
We present two prescriptions for broadband ($ {\sim} 77 - 252\;{\rm GHz} $), millimeter-wave antireflection coatings for cryogenic, sintered polycrystalline aluminum oxide optics: one for large-format (700 mm diameter) planar and plano-convex elements, the other for densely packed arrays of quasi-optical elements-in our case, 5 mm diameter half-spheres (called "lenslets"). The coatings comprise three layers of commercially available, polytetrafluoroethylene-based, dielectric sheet material. The lenslet coating is molded to fit the 150 mm diameter arrays directly, while the large-diameter lenses are coated using a tiled approach. We review the fabrication processes for both prescriptions, then discuss laboratory measurements of their transmittance and reflectance. In addition, we present the inferred refractive indices and loss tangents for the coating materials and the aluminum oxide substrate. We find that at 150 GHz and 300 K the large-format coating sample achieves $ (97 \pm 2)\% $ transmittance, and the lenslet coating sample achieves $ (94 \pm 3)\% $ transmittance.
Collapse
|
2
|
Arrey F, Löwe D, Kuhlmann S, Kaiser P, Moura-Alves P, Krishnamoorthy G, Lozza L, Maertzdorf J, Skrahina T, Skrahina A, Gengenbacher M, Nouailles G, Kaufmann SHE. Humanized Mouse Model Mimicking Pathology of Human Tuberculosis for in vivo Evaluation of Drug Regimens. Front Immunol 2019; 10:89. [PMID: 30766535 PMCID: PMC6365439 DOI: 10.3389/fimmu.2019.00089] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 09/07/2018] [Accepted: 01/14/2019] [Indexed: 11/13/2022] Open
Abstract
Human immune system mice are highly valuable for in vivo dissection of human immune responses. Although they were employed for analyzing tuberculosis (TB) disease, there is little data on the spatial organization and cellular composition of human immune cells in TB granuloma pathology in this model. We demonstrate that human immune system mice, generated by transplanted human fetal liver derived hematopoietic stem cells develop a continuum of pulmonary lesions upon Mycobacterium tuberculosis aerosol infection. In particular, caseous necrotic granulomas, which contribute to prolonged TB treatment time, developed, and had cellular phenotypic spatial-organization similar to TB patients. By comparing two recommended drug regimens, we confirmed observations made in clinical settings: Adding Moxifloxacin to a classical chemotherapy regimen had no beneficial effects on bacterial eradication. We consider this model instrumental for deeper understanding of human specific features of TB pathogenesis and of particular value for the pre-clinical drug development pipeline.
Collapse
Affiliation(s)
- Frida Arrey
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Delia Löwe
- Department of Molecular Pharmacology and Cell Biology, Leibniz Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
| | - Stefanie Kuhlmann
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Peggy Kaiser
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Pedro Moura-Alves
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | | | - Laura Lozza
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Jeroen Maertzdorf
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Tatsiana Skrahina
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Alena Skrahina
- Republican Scientific and Practical Centre for Pulmonology and Tuberculosis, Minsk, Belarus
| | - Martin Gengenbacher
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, United States
| | - Geraldine Nouailles
- Division of Pulmonary Inflammation, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Stefan H E Kaufmann
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| |
Collapse
|
3
|
Ellis SC, Kuhlmann S, Kuehn K, Spinka H, Underwood D, Gupta RR, Ocola LE, Liu P, Wei G, Stern NP, Bland-Hawthorn J, Tuthill P. Photonic ring resonator filters for astronomical OH suppression. Opt Express 2017; 25:15868-15889. [PMID: 28789099 DOI: 10.1364/oe.25.015868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
Ring resonators provide a means of filtering specific wavelengths from a waveguide, and optionally dropping the filtered wavelengths into a second waveguide. Both of these features are potentially useful for astronomical instruments. In this paper we focus on their use as notch filters to remove the signal from atmospheric OH emission lines from astronomical spectra. We derive the design requirements for ring resonators for OH suppression from theory and finite difference time domain simulations. We find that rings with small radii (< 10 μm) are required to provide an adequate free spectral range, leading to high index contrast materials such as Si and Si3N4. Critically coupled rings with high self-coupling coefficients should provide the necessary Q factors, suppression depth, and throughput for efficient OH suppression, but will require post-inscription tuning of the coupling and the resonant wavelengths. The overall prospects for the use of ring resonators in astronomical instruments is promising, provided efficient fibre-chip coupling can be achieved.
Collapse
|
4
|
Dirkx E, Perea Gil I, Li MC, Gupta SK, Nguyen THM, Syeda F, Dirkx E, Raso A, Braga L, Zentilin L, Zacchigna S, Giacca M, De Windt LJ, Prat-Vidal C, Galvez-Monton C, Roura S, Llucia-Valldeperas A, Soler-Botija C, Diaz-Guemes I, Crisostomo V, Sanchez-Margallo FM, Bayes-Genis A, Cimino J, De Santis MC, Pianca N, Sciarretta S, Sandri M, Zaglia T, Mongillo M, Hirsch E, Ghigo A, Bauters C, De Groote P, Foinquinos A, Boon R, De Windt LJ, Batkai S, Pinet F, Thum T, Choquet C, Kober F, Bernard M, Kelly RG, Miquerol L, Lalevee N, Holmes A, Yu T, Tull S, Kuhlmann S, Pavlovic D, Betney D, Riley G, Kucera JP, Jousset F, De Groot J, Rohr S, Brown N, Fabritz L, Kirchhof P. Young Investigator Award Session - Heart40Targeting the miRNA-106b-25 cluster as a potential regenerative therapeutic approach for myocardial injury41An allogeneic bioengineered myocardial graft limits infarct size and improves cardiac function: pre-clinical study in the porcine myocardial infarction model42Phosphoinositide 3-kinase gamma inhibition protects against anthracycline-induced cardiomyopathy by boosting cardiac autophagy43Functional screening of microRNAs identifies miR-22 as a regulator of cardiac autophagy and aging44Functional defects and molecular mechanisms of left ventricular non-compaction in nkx2.5 mutant mice45PITX2 modulates atrial membrane potential, potentiating the antiarrhythmic effects of sodium channel blockers. Cardiovasc Res 2016. [DOI: 10.1093/cvr/cvw139] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
5
|
Flaugher B, Diehl HT, Honscheid K, Abbott TMC, Alvarez O, Angstadt R, Annis JT, Antonik M, Ballester O, Beaufore L, Bernstein GM, Bernstein RA, Bigelow B, Bonati M, Boprie D, Brooks D, Buckley-Geer EJ, Campa J, Cardiel-Sas L, Castander FJ, Castilla J, Cease H, Cela-Ruiz JM, Chappa S, Chi E, Cooper C, da Costa LN, Dede E, Derylo G, DePoy DL, de Vicente J, Doel P, Drlica-Wagner A, Eiting J, Elliott AE, Emes J, Estrada J, Fausti Neto A, Finley DA, Flores R, Frieman J, Gerdes D, Gladders MD, Gregory B, Gutierrez GR, Hao J, Holland SE, Holm S, Huffman D, Jackson C, James DJ, Jonas M, Karcher A, Karliner I, Kent S, Kessler R, Kozlovsky M, Kron RG, Kubik D, Kuehn K, Kuhlmann S, Kuk K, Lahav O, Lathrop A, Lee J, Levi ME, Lewis P, Li TS, Mandrichenko I, Marshall JL, Martinez G, Merritt KW, Miquel R, Muñoz F, Neilsen EH, Nichol RC, Nord B, Ogando R, Olsen J, Palaio N, Patton K, Peoples J, Plazas AA, Rauch J, Reil K, Rheault JP, Roe NA, Rogers H, Roodman A, Sanchez E, Scarpine V, Schindler RH, Schmidt R, Schmitt R, Schubnell M, Schultz K, Schurter P, Scott L, Serrano S, Shaw TM, Smith RC, Soares-Santos M, Stefanik A, Stuermer W, Suchyta E, Sypniewski A, Tarle G, Thaler J, Tighe R, Tran C, Tucker D, Walker AR, Wang G, Watson M, Weaverdyck C, Wester W, Woods R, Yanny B. THE DARK ENERGY CAMERA. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0004-6256/150/5/150] [Citation(s) in RCA: 580] [Impact Index Per Article: 64.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
6
|
Mosher J, Guy J, Kessler R, Astier P, Marriner J, Betoule M, Sako M, El-Hage P, Biswas R, Pain R, Kuhlmann S, Regnault N, Frieman JA, Schneider DP. COSMOLOGICAL PARAMETER UNCERTAINTIES FROM SALT-II TYPE IA SUPERNOVA LIGHT CURVE MODELS. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/0004-637x/793/1/16] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
7
|
Vogelzang A, Perdomo C, Zedler U, Kuhlmann S, Hurwitz R, Gengenbacher M, Kaufmann SHE. Central memory CD4+ T cells are responsible for the recombinant Bacillus Calmette-Guérin ΔureC::hly vaccine's superior protection against tuberculosis. J Infect Dis 2014; 210:1928-37. [PMID: 24943726 PMCID: PMC4241943 DOI: 10.1093/infdis/jiu347] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [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: 12/24/2022] Open
Abstract
Bacillus Calmette-Guérin (BCG) has been used for vaccination against tuberculosis for nearly a century. Here, we analyze immunity induced by a live tuberculosis vaccine candidate, recombinant BCG ΔureC::hly vaccine (rBCG), with proven preclinical and clinical safety and immunogenicity. We pursue in-depth analysis of the endogenous mycobacteria-specific CD4+ T-cell population, comparing the more efficacious rBCG with canonical BCG to determine which T-cell memory responses are prerequisites for superior protection against tuberculosis. rBCG induced higher numbers and proportions of antigen-specific memory CD4+ T cells than BCG, with a CXCR5+CCR7+ phenotype and low expression of the effector transcription factors T-bet and Bcl-6. We found that the superior protection of rBCG, compared with BCG, correlated with higher proportions and numbers of these central memory T cells and of T follicular helper cells associated with specific antibody responses. Adoptive transfer of mycobacteria-specific central memory T cells validated their critical role in protection against pulmonary tuberculosis.
Collapse
Affiliation(s)
| | | | | | | | - Robert Hurwitz
- Core Facility Protein Purification, Max Planck Institute for Infection Biology, Berlin, Germany
| | | | | |
Collapse
|
8
|
Frese C, Frese F, Kuhlmann S, Saure D, Reljic D, Staehle HJ, Wolff D. Effect of endurance training on dental erosion, caries, and saliva. Scand J Med Sci Sports 2014; 25:e319-26. [DOI: 10.1111/sms.12266] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2014] [Indexed: 11/27/2022]
Affiliation(s)
- C. Frese
- Department of Conservative Dentistry; School of Dental Medicine; University Hospital Heidelberg; Heidelberg Germany
| | - F. Frese
- Department of Sports Medicine; Medical Clinic; University Hospital Heidelberg; Heidelberg Germany
| | - S. Kuhlmann
- Department of Conservative Dentistry; School of Dental Medicine; University Hospital Heidelberg; Heidelberg Germany
| | - D. Saure
- Institute of Medical Biometry and Informatics; Ruprecht Karls University; Heidelberg Germany
| | - D. Reljic
- Department of Sports Medicine; Medical Clinic; University Hospital Heidelberg; Heidelberg Germany
| | - H. J. Staehle
- Department of Conservative Dentistry; School of Dental Medicine; University Hospital Heidelberg; Heidelberg Germany
| | - D. Wolff
- Department of Conservative Dentistry; School of Dental Medicine; University Hospital Heidelberg; Heidelberg Germany
| |
Collapse
|
9
|
Nouailles G, Dorhoi A, Koch M, Zerrahn J, Weiner J, Faé KC, Arrey F, Kuhlmann S, Bandermann S, Loewe D, Mollenkopf HJ, Vogelzang A, Meyer-Schwesinger C, Mittrücker HW, McEwen G, Kaufmann SHE. CXCL5-secreting pulmonary epithelial cells drive destructive neutrophilic inflammation in tuberculosis. J Clin Invest 2014; 124:1268-82. [PMID: 24509076 DOI: 10.1172/jci72030] [Citation(s) in RCA: 153] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 11/27/2013] [Indexed: 12/17/2022] Open
Abstract
Successful host defense against numerous pulmonary infections depends on bacterial clearance by polymorphonuclear leukocytes (PMNs); however, excessive PMN accumulation can result in life-threatening lung injury. Local expression of CXC chemokines is critical for PMN recruitment. The impact of chemokine-dependent PMN recruitment during pulmonary Mycobacterium tuberculosis infection is not fully understood. Here, we analyzed expression of genes encoding CXC chemokines in M. tuberculosis-infected murine lung tissue and found that M. tuberculosis infection promotes upregulation of Cxcr2 and its ligand Cxcl5. To determine the contribution of CXCL5 in pulmonary PMN recruitment, we generated Cxcl5(-/-) mice and analyzed their immune response against M. tuberculosis. Both Cxcr2(-/-) mice and Cxcl5(-/-) mice, which are deficient for only one of numerous CXCR2 ligands, exhibited enhanced survival compared with that of WT mice following high-dose M. tuberculosis infection. The resistance of Cxcl5(-/-) mice to M. tuberculosis infection was not due to heightened M. tuberculosis clearance but was the result of impaired PMN recruitment, which reduced pulmonary inflammation. Lung epithelial cells were the main source of CXCL5 upon M. tuberculosis infection, and secretion of CXCL5 was reduced by blocking TLR2 signaling. Together, our data indicate that TLR2-induced epithelial-derived CXCL5 is critical for PMN-driven destructive inflammation in pulmonary tuberculosis.
Collapse
|
10
|
Goldmann K, Kuhlmann S, Gerlach M, Bornträger C. [Removal of the laryngeal mask airway in the post-anesthesia care unit. A means of process optimization?]. Anaesthesist 2011; 60:1002-8. [PMID: 21881929 DOI: 10.1007/s00101-011-1936-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 03/01/2011] [Revised: 08/03/2011] [Accepted: 08/03/2011] [Indexed: 11/26/2022]
Abstract
BACKGROUND Removal of the laryngeal mask airway in the post-anesthesia care unit could potentially contribute to a faster turnover from one operation to the next. The aim of this study was, therefore, to obtain an insight into the potential time saving and the safety of planned removal of the ProSeal™-LMA (PLMA) in the post-anesthesia care unit. METHODS In this study 120 adult patients with American Society of Anesthesiologists (ASA) classification I-II, age range 18-85 years, undergoing a surgical procedure under general anesthesia in which the PLMA was used were randomly assigned to one of two groups. In group I, the PLMA was removed in the awake patient in the operating room close to the end of the procedure. In group II, the anesthetised but spontaneously breathing patients were moved to the recovery room and the PLMA removed when the patient was awake. The anesthesia technique was standardized [balanced, sevoflurane, fentanyl, bispectral index-guided (BIS) target value=35±5] and identical in both groups until randomization. Patients were breathing room air during transport to the recovery room. Different time intervals as well as the incidence of critical incidents were compared between groups. An oxygen saturation (S(p)O(2)) value <95% was considered a clinically relevant and S(p)O(2) values <90% as clinically critical O(2)-desaturation. RESULTS Removal of the PLMA took place after an average of 4.9±5.1 min in group I and after 19.5±9.6 min in group II. There was no difference in the availability of the anesthetist in the operating room for the following procedure between groups (group I: 12±5.6 min vs. group II: 10.7±4.2 min, p>0.05) despite the fact that patients of group II left the operating room faster (4.9±3.9 min) than patients of group I (7.1±5.1 min, p<0.01). In group II patients were ready for discharge (White score=12) from the recovery room later (13.2±8.2 min) than in group I (3.6±4.8 min, p<0.01). There were no significant differences in other process related time intervals between group I and group II: duration of the operation (113.2±45.9 min vs. 105.3±42.6 min), duration of dressing (5.1±3.7 min vs. 4.6±2.8 min), duration of transport to the recovery room (3.9±1.3 min vs. 3.6±1.3 min) and information at end of surgery by the surgeon (22.5±9.3 min vs. 22.4±10.5 min). The incidence of clinically relevant as well as clinically critical O(2) desaturation at the time of recovery room arrival (S(p)O(2)≤90%) was increased in group II with 33.3% vs. 56.6% and 13.3% vs. 6.7%, p<0.01, respectively. CONCLUSION Planned PLMA removal in the recovery room after BIS-guided balanced anesthesia did not enable the anesthetist to be available earlier for induction of anesthesia in the following patient. Hence the anesthetist could not contribute to a faster turnover of cases. Obviously, with the type of close communication between surgeon and anesthetist dictated by the study protocol (announcement of expected end of surgery by the surgeon 20 min before end of surgery) it is possible for the patient to regain consciousness within a very small time window following the end of surgery. Following this kind of protocol, postponement of removal of the LMA in the recovery room does not seem to be attractive neither from a clinical nor an economic point of view. In contrast, removal of LMA in the recovery room should be restricted to occasional cases with an abrupt end of the operation or prolonged emergence from anesthesia. The obvious risk of hypoxemia necessitates continuous O(2) application and S(p)O(2) monitoring during transport to the recovery room.
Collapse
Affiliation(s)
- K Goldmann
- Klinik für Anästhesie und Intensivtherapie, Universitätsklinikum Gießen-Marburg, Marburg, Germany.
| | | | | | | |
Collapse
|
11
|
Leimkühler K, Bach F, Kuhlmann S, Feidicker B, Heim MU, Susemihl C, Schmidt B, Mertzlufft F. [Acquired von Willebrand's disease type 2A following arteriovenous fistula for haemodialysis?]. Hamostaseologie 2011; 31:118-22. [PMID: 21152674 DOI: 10.5482/ha-1129] [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: 11/05/2022] Open
Abstract
Acquired von Willebrand's disease (aVWD) is considered to be an underestimated cause of unexplained bleeding. Adsorption of von Willebrand factor (VWF) to tumour cells or hydroxyethyl starch and elimination of VWF by autoantibodies as well as shear stress-induced mechanical alteration of VWF with concomitant cleavage by enzymes may lead to an acquired deficiency of VWF and a bleeding disorder. We report a 39-year-old woman who developed spontaneous bleeding five years after surgical creation of an arteriovenous fistula (AVF) for haemodialysis treatment. AVWD type 2A was diagnosed after successful renal transplantation. One year after surgical closure of the AVF, the aVWD could not be verified again. Thus, the aVWD may have developed because of altered blood flow and shear stress inside the arteriovenous fistula.
Collapse
Affiliation(s)
- K Leimkühler
- Klinik für Anästhesiologie, Intensiv-, Notfall-, Transfusionsmedizin und Schmerztherapie, Evangelisches Krankenhaus Bielefeld.
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Nouailles G, Day TA, Kuhlmann S, Loewe D, Dorhoi A, Gamradt P, Hurwitz R, Jörg S, Pradl L, Hutloff A, Koch M, Kursar M, Kaufmann SHE. Impact of inducible co-stimulatory molecule (ICOS) on T-cell responses and protection against Mycobacterium tuberculosis infection. Eur J Immunol 2011; 41:981-91. [DOI: 10.1002/eji.201040608] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 11/16/2010] [Accepted: 01/05/2011] [Indexed: 11/07/2022]
|
13
|
Day TA, Koch M, Nouailles G, Jacobsen M, Kosmiadi GA, Miekley D, Kuhlmann S, Jörg S, Gamradt P, Mollenkopf HJ, Hurwitz R, Reece ST, Kaufmann SHE, Kursar M. Secondary lymphoid organs are dispensable for the development of T-cell-mediated immunity during tuberculosis. Eur J Immunol 2010; 40:1663-73. [PMID: 20222088 DOI: 10.1002/eji.201040299] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [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: 01/02/2023]
Abstract
Tuberculosis causes 2 million deaths per year, yet in most cases the immune response successfully contains the infection and prevents disease outbreak. Induced lymphoid structures associated with pulmonary granuloma are observed during tuberculosis in both humans and mice and could orchestrate host defense. To investigate whether granuloma perform lymphoid functions, mice lacking secondary lymphoid organs (SLO) were infected with Mycobacterium tuberculosis (MTB). As in WT mice, granuloma developed, exponential growth of MTB was controlled, and antigen-specific T-cell responses including memory T cells were generated in the absence of SLO. Moreover, adoptively transferred T cells were primed locally in lungs in a granuloma-dependent manner. T-cell activation was delayed in the absence of SLO, but resulted in a normal development program including protective subsets and functional recall responses that protected mice against secondary MTB infection. Our data demonstrate that protective immune responses can be generated independently of SLO during MTB infection and implicate local pulmonary T-cell priming as a mechanism contributing to host defense.
Collapse
Affiliation(s)
- Tracey A Day
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Kuhlmann S, de Lussanet MHE, Lappe M. Perception of limited-lifetime biological motion from different viewpoints. J Vis 2009; 9:11.1-14. [DOI: 10.1167/9.10.11] [Citation(s) in RCA: 7] [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: 11/24/2022] Open
|
15
|
Beisiegel M, Kursar M, Koch M, Loddenkemper C, Kuhlmann S, Zedler U, Stäber M, Hurwitz R, Kaufmann SHE. Combination of host susceptibility and virulence of Mycobacterium tuberculosis determines dual role of nitric oxide in the protection and control of inflammation. J Infect Dis 2009; 199:1222-32. [PMID: 19302011 DOI: 10.1086/597421] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Tuberculosis (TB) remains a global health threat. Although it is generally accepted that TB results from intensive cross-talk between the host and the pathogen Mycobacterium tuberculosis, underlying mechanisms remain elusive. The first evidence of human polymorphisms related to susceptibilities to distinct M. tuberculosis lineages has been gathered. Confrontation of limited host resistance with heightened bacterial virulence forms a most hazardous combination. We investigated extreme combinations, confronting inducible nitric oxide synthase-deficient (iNOS(-/-)) and wild-type (WT) mice with 2 related M. tuberculosis strains that differ markedly in virulence, namely, the M. tuberculosis laboratory strains H37Rv and H37Ra. We provide evidence that deregulated chemokine signaling and excessive neutrophil necrosis contribute to disproportionate neutrophil influx and exacerbated TB in iNOS(-/-) mice infected with virulent M. tuberculosis (strain H37Rv), whereas resistant and susceptible mice controlled attenuated H37Ra equally well. Thus, a combination of host susceptibility and M. tuberculosis virulence determines the role of iNOS in the protection and control of inflammation.
Collapse
Affiliation(s)
- Martin Beisiegel
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Kuhlmann S. Das Leben nach der Forschung - Erfahrungsbericht aus dem Berufsstart in der Produktion. CHEM-ING-TECH 2008. [DOI: 10.1002/cite.200750558] [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: 11/09/2022]
|
17
|
Kuhlmann S, Paetz C, Wasserscheid P, Blann K, Dixon J, Walsh R. Continuous Production of 1-Hexene and 1-Octene in a Plug Flow Tubular Reactor. CHEM-ING-TECH 2008. [DOI: 10.1002/cite.200750634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
18
|
Owens JF, Huston J, Keppel CE, Kuhlmann S, Morfín JG, Olness F, Pumplin J, Stump D, Zeller GP, Morfin JG, Cavanna F. Nuclear Corrections and Parton Distribution Functions—Lessons Learned from Global Fitting. ACTA ACUST UNITED AC 2007. [DOI: 10.1063/1.2834487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
|
19
|
Kuhlmann S, Wasserscheid P, Blann K, Dixon JT, Morgan DH. Tri- and Tetramerisation of Ethylene: On-purpose Routes to Linear Alpha Olefins. CHEM-ING-TECH 2006. [DOI: 10.1002/cite.200650025] [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: 11/06/2022]
|
20
|
Abstract
Glucocorticoids secreted in response to stress modulate memory in animals and humans. Studies in rodents suggest that glucocorticoids enhance memory consolidation but impair delayed retrieval. Similar negative effects on memory retrieval have been reported in humans. The human studies so far have not addressed the issue of emotional valence, which conceivably could modulate the effects of cortisol on retrieval. The present mini-review discusses two recent studies from our laboratories that investigate the influence of emotional valence on the retrieval-impairing effects of cortisol. Both studies observed that cortisol impaired retrieval and that emotional valence influenced these effects. For autobiographical memory the impairing effects were stronger for neutral than for emotional items, whereas for word retrieval the opposite pattern was observed (stronger effects on emotional words). Possible reasons for these results are the different memory domains tested as well as the different sex of the subjects. Future studies will address these issues, which are of relevance for psychiatric disorders such as posttraumatic stress disorder or major depression.
Collapse
Affiliation(s)
- O T Wolf
- Department of Experimental Psychology, University of Duesseldorf, Universitaetsstrasse 1, D- 40225 Duesseldorf, Germany.
| | | | | | | | | |
Collapse
|
21
|
Appel H, Kuon W, Kuhne M, Hülsmeyer M, Kollnberger S, Kuhlmann S, Weiss E, Zeitz M, Wucherpfennig K, Bowness P, Sieper J. The Solvent-Inaccessible Cys67Residue of HLA-B27 Contributes to T Cell Recognition of HLA-B27/Peptide Complexes. J Immunol 2004; 173:6564-73. [PMID: 15557146 DOI: 10.4049/jimmunol.173.11.6564] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Crystallographic studies have suggested that the cysteine at position 67 (Cys(67)) in the B pocket of the MHC molecule HLA-B*2705 is of importance for peptide binding, and biophysical studies have documented altered thermodynamic stability of the molecule when Cys(67) was mutated to serine (Ser(67)). In this study, we used HLA-B27.Cys(67) and HLA-B27.Ser(67) tetramers with defined T cell epitopes to determine the contribution of this polymorphic, solvent-inaccessible MHC residue to T cell recognition. We generated these HLA-B27 tetramers using immunodominant viral peptides with high binding affinity to HLA-B27 and cartilage-derived peptides with lower affinity. We demonstrate that the yield of refolding of HLA-B27.Ser(67) molecules was higher than for HLA-B27.Cys(67) molecules and strongly dependent on the affinity of the peptide. T cell recognition did not differ between HLA-B27.Cys(67) and HLA.B27.Ser(67) tetramers for the viral peptides that were investigated. However, an aggrecan peptide-specific T cell line derived from an HLA-B27 transgenic BALB/c mouse bound significantly stronger to the HLA-B27.Cys(67) tetramer than to the HLA-B27.Ser(67) tetramer. Modeling studies of the molecular structure suggest the loss of a SH ... pi hydrogen bond with the Cys-->Ser substitution in the HLA-B27 H chain which reduces the stability of the HLA-B27/peptide complex. These results demonstrate that a solvent-inaccessible residue in the B pocket of HLA-B27 can affect TCR binding in a peptide-dependent fashion.
Collapse
Affiliation(s)
- Heiner Appel
- Division of Gastroenterology, Infectiology and Rheumatology, Charité Berlin, Campus Benjamin Franklin, Free University Berlin, Germany.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Appel H, Kuon W, Kuhne M, Wu P, Kuhlmann S, Kollnberger S, Thiel A, Bowness P, Sieper J. Use of HLA-B27 tetramers to identify low-frequency antigen-specific T cells in Chlamydia-triggered reactive arthritis. Arthritis Res Ther 2004; 6:R521-34. [PMID: 15535830 PMCID: PMC1064864 DOI: 10.1186/ar1221] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2004] [Revised: 06/08/2004] [Accepted: 07/02/2004] [Indexed: 11/10/2022] Open
Abstract
Reports of the use of HLA-B27/peptide tetrameric complexes to study peptide-specific CD8+ T cells in HLA-B27+-related diseases are rare. To establish HLA-B27 tetramers we first compared the function of HLA-B27 tetramers with HLA-A2 tetramers by using viral epitopes. HLA-B27 and HLA-A2 tetramers loaded with immunodominant peptides from Epstein-Barr virus were generated with comparable yields and both molecules detected antigen-specific CD8+ T cells. The application of HLA-B27 tetramers in HLA-B27-related diseases was performed with nine recently described Chlamydia-derived peptides in synovial fluid and peripheral blood, to examine the CD8+ T cell response against Chlamydia trachomatis antigens in nine patients with Chlamydia-triggered reactive arthritis (Ct-ReA). Four of six HLA-B27+ Ct-ReA patients had specific synovial T cell binding to at least one HLA-B27/Chlamydia peptide tetramer. The HLA-B27/Chlamydia peptide 195 tetramer bound to synovial T cells from three of six patients and HLA-B27/Chlamydia peptide 133 tetramer to synovial T cells from two patients. However, the frequency of these cells was low (0.02-0.09%). Moreover, we demonstrate two methods to generate HLA-B27-restricted T cell lines. First, HLA-B27 tetramers and magnetic beads were used to sort antigen-specific CD8+ T cells. Second, Chlamydia-infected dendritic cells were used to stimulate CD8+ T cells ex vivo. Highly pure CD8 T cell lines could be generated ex vivo by magnetic sorting by using HLA-B27 tetramers loaded with an EBV peptide. The frequency of Chlamydia-specific, HLA-B27 tetramer-binding CD8+ T cells could be increased by stimulating CD8+ T cells ex vivo with Chlamydia-infected dendritic cells. We conclude that HLA-B27 tetramers are a useful tool for the detection and expansion of HLA-B27-restricted CD8+ T cells. T cells specific for one or more of three Chlamydia-derived peptides were found at low frequency in synovial fluid from HLA-B27+ patients with Ct-ReA. These cells can be expanded ex vivo, suggesting that they are immunologically functional.
Collapse
Affiliation(s)
- Heiner Appel
- Charite Berlin, Campus Benjamin Franklin, Department for Gastroenterology, Infectiology and Rheumatology, Berlin, Germany
| | - Wolfgang Kuon
- Charite Berlin, Campus Benjamin Franklin, Department for Gastroenterology, Infectiology and Rheumatology, Berlin, Germany
| | - Maren Kuhne
- Charite Berlin, Campus Benjamin Franklin, Department for Gastroenterology, Infectiology and Rheumatology, Berlin, Germany
| | - Peihua Wu
- Charite Berlin, Campus Benjamin Franklin, Department for Gastroenterology, Infectiology and Rheumatology, Berlin, Germany
- Deutsches Rheumaforschungszentrum Berlin, Germany
| | - Stefanie Kuhlmann
- Charite Berlin, Campus Benjamin Franklin, Department for Gastroenterology, Infectiology and Rheumatology, Berlin, Germany
| | - Simon Kollnberger
- MRC HIU, Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, UK
| | | | - Paul Bowness
- MRC HIU, Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, UK
| | - Joachim Sieper
- Charite Berlin, Campus Benjamin Franklin, Department for Gastroenterology, Infectiology and Rheumatology, Berlin, Germany
- Deutsches Rheumaforschungszentrum Berlin, Germany
| |
Collapse
|
23
|
Molog GA, Empt U, Kuhlmann S, van Uden W, Pras N, Alfermann AW, Petersen M. Deoxypodophyllotoxin 6-hydroxylase, a cytochrome P450 monooxygenase from cell cultures of Linum flavum involved in the biosynthesis of cytotoxic lignans. Planta 2001; 214:288-294. [PMID: 11800394 DOI: 10.1007/s004250100617] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Cell-suspension cultures of Linum flavum L. (Linaceae) synthesize and accumulate aryltetrahydronaphthalene lignans with 6-methoxypodophyllotoxin as the main component. The experimental data indicate that the biosynthesis of 6-methoxypodophyllotoxin occurs via deoxypodophyllotoxin, beta-peltatin, and beta-peltatin-A methyl ether. The enzyme catalyzing the introduction of the hydroxyl group in position 6 is deoxypodophyllotoxin 6-hydroxylase (DOP6H). The enzyme was shown to be a cytochrome P450-dependent monooxygenase by blue-light reversion of carbon monoxide inhibition and inhibition by cytochrome c. DOP6H is a membrane-bound microsomal enzyme with a pH optimum of 7.6 and a temperature optimum of 26 degrees C. Deoxypodophyllotoxin is specifically accepted with an apparent Km of 20 microM and a saturation concentration of 200 microM; 4'-demethyldeoxypodophyllotoxin is the only other tested substrate accepted for hydroxylation. DOP6H predominantly accepts NADPH as electron donor; NADH can only sustain low hydroxylation activities. A synergistic effect of NADPH and NADH is not observed. The enzyme is saturated around 250 microM NADPH; the apparent Km for this substrate is 36 microM.
Collapse
Affiliation(s)
- G A Molog
- Department of Pharmaceutical Biology, University Centre for Pharmacy, Groningen Research Institute of Pharmacy, University of Groningen, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
24
|
Bedoui S, Kuhlmann S, Nave H, Drube J, Pabst R, von Hörsten S. Differential effects of neuropeptide Y (NPY) on leukocyte subsets in the blood: mobilization of B-1-like B-lymphocytes and activated monocytes. J Neuroimmunol 2001; 117:125-32. [PMID: 11431012 DOI: 10.1016/s0165-5728(01)00328-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [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: 10/18/2022]
Abstract
Sympathetic nervous system activation mobilizes leukocytes but it is unknown whether the concomitant neuropeptide Y (NPY)-release also alters blood leukocyte counts. Using chronic intravenous (i.v.) cannulation of freely moving rats and flow cytometry, time-, dose- and subset-specific effects of NPY on blood leukocytes were investigated 1-15 min after injection: High-dose NPY increases leukocytes numbers by preferentially mobilizing CD4(+) T-cells, activated NKR-P1A(+) monocytes and NK-cells. Low-dose NPY significantly decreases B-lymphocyte and NK-cell numbers. Furthermore, NPY dose-dependently mobilizes a previously undetected IgM(low)CD5(+)CD11b(+) B-cell subpopulation in rats ("B1-like" B-lymphocytes). These data suggest a role for the sympathetic neurotransmitter NPY in neuroimmune alterations in vivo.
Collapse
Affiliation(s)
- S Bedoui
- Department of Functional and Applied Anatomy, OE 4120, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany
| | | | | | | | | | | |
Collapse
|
25
|
Bozem M, Kuhlmann S, Blum R, Feick P, Schulz I. Hormone-stimulated calcium release is inhibited by cytoskeleton-disrupting toxins in AR4-2J cells. Cell Calcium 2000; 28:73-82. [PMID: 10970764 DOI: 10.1054/ceca.2000.0133] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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: 11/18/2022]
Abstract
We have studied the role of the actin cytoskeleton in bombesin-induced inositol 1,4,5-trisphosphate (IP(3))-production and Ca(2+)release in the pancreatic acinar tumour cell line AR4-2J. Intracellular and extracellular free Ca(2+)concentrations were measured in cell suspensions, using Fura-2. Disruption of the actin cytoskeleton by pretreatment of the cells with latrunculin B (10 microM), cytochalasin D (10 microM) or toxin B from Clostridium difficile (20 ng/ml) for 5-29 h led to inhibition of both, bombesin-stimulated IP(3)-production and Ca(2+)release. The toxins had no effect on binding of bombesin to its receptor, on Ca(2+)uptake into intracellular stores and on resting Ca(2+)levels. Ca(2+)mobilization from intracellular stores, induced by thapsigargin (100 nM) or IP(3)(1 microM) was not impaired by latrunculin B. In latrunculin B-pretreated cells inhibition of both, bombesin-stimulated IP(3)- production and Ca(2+)release was partly suspended in the presence of aluminum fluoride, an activator of G-proteins. Aluminum fluoride had no effect on basal IP(3)and Ca(2+)levels of control and toxin-pretreated cells. We conclude that disruption of the actin cytoskeleton impairs coupling of the bombesin receptor to its G-protein, resulting in inhibition of phospholipase C-activity with subsequent decreases in IP(3)-production and Ca(2+)release.
Collapse
Affiliation(s)
- M Bozem
- Department of Physiology, University of the Saarland, Homburg-Saar, Germany
| | | | | | | | | |
Collapse
|
26
|
von Hörsten S, Helfritz A, Kuhlmann S, Nave H, Tschernig T, Pabst R, Ben-Eliyahu S, Meyer D, Schmidt RE, Schmitz C. Stereological quantification of carboxyfluorescein-labeled rat lung metastasis: a new method for the assessment of natural killer cell activity and tumor adhesion in vivo and in situ. J Immunol Methods 2000; 239:25-34. [PMID: 10821944 DOI: 10.1016/s0022-1759(00)00162-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [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
The function of natural killer (NK) cells is often studied by assessing in vitro levels of NK cell mediated lysis of target cells, or by assessing in vivo levels of lung tumor cell retention or metastatic colonization of intravenously injected tumor cells. However, these methods do not permit direct quantification and visualization of NK cells and their targets in vivo and in situ. Here, a new approach is described to visualize effector-to-target interactions as well as to estimate total numbers of targets in the lung, in vivo and in situ. MADB106 tumor cells were vitally labeled using carboxyfluorescein (CFSE) and intravenously (i.v.) injected into Fischer 344 rats (10(6) cells/rat). This mammary adenocarcinoma derived cell line is syngeneic to the inbred Fischer 344 rat and highly sensitive to NK cell activity in vivo. Effector-to-target interactions were visualized by immunostaining. Using the optical fractionator method, total numbers of CFSE-labeled MADB106 tumor cells were estimated in the left lung of the animals 5 min after tumor inoculation. To further demonstrate the usefulness of this approach in reflecting in vivo processes, rats were inoculated with MADB106 cells and simultaneously with a single i.v. bolus of either 1 microg/kg adrenaline or saline. Both lungs were removed 5 min later. Adrenaline caused a significant 80% reduction in the total number of lung CFSE-labeled MADB106 tumor cells, suggesting a rapid modulation of metastasis by stress hormones. This new approach facilitates the monitoring of effector-to-target interactions and the quantification of immune cell function or tumor adhesion in vivo and in situ.
Collapse
Affiliation(s)
- S von Hörsten
- Medical School of Hannover, OE 4120, Department of Functional and Applied Anatomy, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
|
28
|
Huston J, Kovacs E, Kuhlmann S, Lai HL, Owens JF, Soper D, Tung WK. Large Transverse Momentum Jet Production and the Gluon Distribution inside the Proton. Phys Rev Lett 1996; 77:444-447. [PMID: 10062814 DOI: 10.1103/physrevlett.77.444] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
29
|
|
30
|
Kuhlmann S. The Impact of Community Research Programmes in France. Final Report prepared for the European Commission by Philippe Laredo Les Presses de l'Ecole des Mines, Paris, France, 1995, 157 pages, 170 FF, ISBN 2-911256-01-8. Research Evaluation 1995. [DOI: 10.1093/rev/5.2.169] [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: 11/13/2022]
|
31
|
Huston J, Kovacs E, Kuhlmann S, Lai HL, Owens JF, Tung WK. Global QCD study of direct photon production. Phys Rev D Part Fields 1995; 51:6139-6145. [PMID: 10018378 DOI: 10.1103/physrevd.51.6139] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
32
|
|
33
|
Abe F, Amidei D, Apollinari G, Atac M, Auchincloss P, Baden A, Bailey M, Bamberger A, Barnett B, Barbaro-Galtieri A, Barnes V, Baumann T, Bedeschi F, Behrends S, Belforte S, Bellettini G, Bellinger J, Bensinger J, Beretvas A, Berge J, Bertolucci S, Bhadra S, Binkley M, Blair R, Blocker C, Bolognesi V, Booth A, Boswell C, Brandenburg G, Brown D, Buckley-Geer E, Budd H, Byon A, Byrum K, Campagnari C, Campbell M, Carey R, Carithers W, Carlsmith D, Carroll J, Cashmore R, Cervelli F, Chadwick K, Chiarelli G, Chinowsky W, Cihangir S, Clark A, Connor D, Contreras M, Cooper J, Cordelli M, Crane D, Curatolo M, Day C, Dell'Agnello S, Dell'Orso M, Demortier L, Derwent P, Devlin T, DiBitonto D, Drucker R, Elias J, Ely R, Eno S, Errede S, Esposito B, Flaugher B, Foster G, Franklin M, Freeman J, Frisch H, Fuess T, Fukui Y, Funayama Y, Garfinkel A, Gauthier A, Geer S, Giannetti P, Giokaris N, Giromini P, Gladney L, Gold M, Goulianos K, Grassmann H, Grosso-Pilcher C, Haber C, Hahn S, Handler R, Hara K, Harris R, Hauser J, Hawk C, Hessing T, Hollebeek R, Holloway L, Hu P, Hubbard B, Huffman B, Hughes R, Hurst P, Huth J, Incagli M, Ino T, Iso H, Jensen H, Jessop C, Johnson R, Joshi U, Kadel R, Kamon T, Kanda S, Kardelis D, Karliner I, Kearns E, Keeble L, Kephart R, Kesten P, Keup R, Keutelian H, Kim D, Kim S, Kirsch L, Kondo K, Konigsberg J, Kovacs E, Kuhlmann S, Kuns E, Laasanen A, Lamoureux J, Leone S, Li W, Liss T, Lockyer N, Luchini C, Maas P, Maeshima K, Mangano M, Marriner J, Markeloff R, Markosky L, Mattingly R, McIntyre P, Menzione A, Meyer T, Mikamo S, Miller M, Mimashi T, Miscetti S, Mishina M, Miyashita S, Morita Y, Moulding S, Mueller J, Mukherjee A, Nakae L, Nakano I, Nelson C, Newman-Holmes C, Ng J, Ninomiya M, Nodulman L, Ogawa S, Paoletti R, Para A, Pare E, Patrick J, Phillips T, Plunkett R, Pondrom L, Proudfoot J, Punzi G, Quarrie D, Ragan K, Redlinger G, Rhoades J, Roach M, Rimondi F, Ristori L, Rohaly T, Roodman A, Sakumoto W, Sansoni A, Sard R, Savoy-Navarro A, Scarpine V, Schlabach P, Schmidt E, Schub M, Schwitters R, Scribano A, Segler S, Seiya Y, Sekiguchi M, Shapiro M, Shaw N, Sheaff M, Shochet M, Siegrist J, Sinervo P, Skarha J, Sliwa K, Smith D, Snider F, Song L, St. Denis R, Stefanini A, Sullivan G, Swartz R, Takano M, Tartarelli F, Takikawa K, Tarem S, Theriot D, Timko M, Tipton P, Tkaczyk S, Tollestrup A, Tonnison J, Trischuk W, Tsay Y, Ukegawa F, Underwood D, Vejcik S, Vidal R, Wagner R, Wagner R, Wainer N, Walsh J, Watts T, Webb R, Wendt C, Wester W, Westhusing T, White S, Wicklund A, Williams H, Winer B, Yagil A, Yamashita A, Yasuoka K, Yeh G, Yoh J, Yokoyama M, Yun J, Zetti F. Measurement of the e+e- Invariant-Mass Distribution in p-barp Collisions at s=1.8 TeV. Phys Rev Lett 1991; 67:2418-2422. [PMID: 10044421 DOI: 10.1103/physrevlett.67.2418] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
34
|
Abstract
The electrical properties of immunocytologically identified oligondendrocytes from embryonic mouse spinal cord maintained in culture for 3 to 6 weeks studied by passing current and recording potential changes with two separate intracellular electrodes. The average input resistance was 3.3 M omega and ranged from 0.7 to 16 M omega (n = 35). The input resistance increased by 19% with depolarization and decreased by 9% with hyperpolarization of 25 mV. The membrane time constant determined from the slope of the late exponential tail was 3.45 +/- 2.5 ms SD (n = 15). The specific membrane resistance of three cells was determined by a simplified square pulse analysis combined with measurement of membrane area. Membrane area was estimated from photomicrographs of cells injected with Lucifer Yellow CH and stained with the cell surface-reactive antibody 04 and from electron micrographs. An average specific membrane resistance of 1.3 X 10(3) omega cm2 and specific capacitance of 1.7 mu F/cm2 were calculated. Increasing [K+]o depolarized the cells and decreased the input resistance and the time constant.
Collapse
|