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Öjekull J, Andersson PU, Pettersson JBC, Marković N, Thomas RD, Al Khalili A, Ehlerding A, Österdahl F, af Ugglas M, Larsson M, Danared H, Källberg A. Dissociative recombination of water cluster ions with free electrons: Cross sections and branching ratios. J Chem Phys 2008; 128:044311. [DOI: 10.1063/1.2823062] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Öjekull J, Andersson PU, Någård MB, Pettersson JBC, Marković N, Derkatch AM, Neau A, Al Khalili A, Rosén S, Larsson M, Semaniak J, Danared H, Källberg A, Österdahl F, af Ugglas M. Dissociative recombination of H+(H2O)3 and D+(D2O)3 water cluster ions with electrons: Cross sections and branching ratios. J Chem Phys 2007; 127:194301. [DOI: 10.1063/1.2803901] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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128
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Yamamoto S, Wilczek HE, Nowak G, Larsson M, Oksanen A, Iwata T, Gjertsen H, Söderdahl G, Wikström L, Ando Y, Suhr OB, Ericzon BG. Liver transplantation for familial amyloidotic polyneuropathy (FAP): a single-center experience over 16 years. Am J Transplant 2007; 7:2597-604. [PMID: 17868062 DOI: 10.1111/j.1600-6143.2007.01969.x] [Citation(s) in RCA: 134] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Orthotopic liver transplantation (LTx) is currently the only available treatment that has been proven to halt the progress of familial amyloidotic polyneuropathy (FAP). The aim of this study was to assess mortality and symptomatic response to LTx for FAP. All 86 FAP patients transplanted at our hospital between April 1990 and November 2005 were included in the study. Five patients underwent retransplantation. The 1-, 3- and 5-year patient survival rates in patients transplanted during 1996-2005 were 94.6%, 92.3% and 92.3%, respectively, a significant difference from the rates of 76.7%, 66.7% and 66.7%, respectively, during 1990-1995 (p = 0.0003). Multivariate analysis revealed that the age at the time of LTx (>or=40 years), duration of the disease (>or=7 years) and modified body mass index (mBMI) (<600) were independent prognostic factors for patient survival. A halt in the progress of symptoms was noted in most patients, but only a minority experienced an improvement after LTx. To optimize the posttransplant prognosis, LTx should be performed in the early stages of the disease, and close post-LTx monitoring of heart function by echocardiography and of heart arrhythmia by Holter ECG is mandatory.
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Istrate C, Douagi I, Charpilienne A, McInerney GM, Hidmark A, Johansen K, Larsson M, Magnusson KE, Poncet D, Svensson L, Hinkula J. Bone marrow dendritic cells internalize live RF-81 bovine rotavirus and rotavirus-like particles (RF 2/6-GFP-VLP and RF 8*2/6/7-VLP) but are only activated by live bovine rotavirus. Scand J Immunol 2007; 65:494-502. [PMID: 17523941 DOI: 10.1111/j.1365-3083.2007.01907.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Dendritic cells (DC) represent the link between innate and adaptive immunity. They are classified as antigen-presenting cells (APC) and can initiate and modulate the immune response. To investigate the interaction with DCs, live RF-81 bovine rotavirus strain (RFV) and rotavirus-like particles (rota-VLP), RF 2/6-GFP-VLP and rota RF 8*2/6/7-VLP, were added in vitro to murine bone marrow-derived DCs (bmDCs). Live RFV, RF 2/6-GFP-VLP and RF 8*2/6/7-VLP all bound to bmDC and were internalized but only live RFV stimulated phenotypic maturation of the bmDCs as shown by the upregulation of the co-stimulatory molecule CD86. Even though bmDCs internalized RF 2/6-GFP-VLP and RF 8*2/6/7-VLP as efficiently as live RFV, these rota-VLP were not able to activate the cells. Supernatants derived from bmDC cultures treated with live RFV, RF 2/6-GFP-VLP or RF 8*2/6/7-VLP were examined for TNF-alpha production. At 6, 18 and 24 h post-infection, TNF-alpha concentrations were significantly increased in cultures treated with live RFV and rota-VLP compared with untreated cultures. In conclusion, this study showed that live RF-81 bovine rotavirus strain was internalized and induced bmDCs activation, whereas both RF 2/6-GFP-VLP and RF 8*2/6/7-VLP were internalized by bmDCs without triggering their activation.
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130
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Zhaunerchyk V, Geppert WD, Vigren E, Hamberg M, Danielsson M, Larsson M, Thomas RD, Kaminska M, Osterdahl F. Dissociative recombination study of N3+: Cross section and branching fraction measurements. J Chem Phys 2007; 127:014305. [PMID: 17627344 DOI: 10.1063/1.2747601] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
We report an investigation into the dissociative recombination of the azide radical cation, N(3) (+). The reaction rate constant has been measured to be 6.47 x 10(-7) cm(3) s(-1) at room temperature. This value is smaller than those reported earlier for the ion-electron neutralization of N(3) (+) at nitrogen atmospheric pressure. A strong propensity to dissociate through the N(2)+N channel has been observed.
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131
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Zhaunerchyk V, Al-Khalili A, Thomas RD, Geppert WD, Bednarska V, Petrignani A, Ehlerding A, Hamberg M, Larsson M, Rosen S, van der Zande WJ. Rotational state effects in the dissociative recombination of H2+. PHYSICAL REVIEW LETTERS 2007; 99:013201. [PMID: 17678152 DOI: 10.1103/physrevlett.99.013201] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2007] [Indexed: 05/16/2023]
Abstract
We have studied the dissociative recombination (DR) of molecular hydrogen ions with slow electrons over a range of collision energies from 0 to 400 meV. By employing a pulsed expansion source for rotational cooling and by exploiting super elastic collisions with near-0-eV electrons in a heavy ion storage ring for vibrational cooling, we observe a highly structured DR cross section, comparable to that reported for HD+. Using para-hydrogen-enriched ion beams, we identify for the first time features in the DR cross sections attributed to nu=0, J=even molecules (para-H2) and nu=0, J=odd (ortho-H2) molecules, separately. Indications are given that para levels have different DR rate coefficients from ortho levels for the first four vibrational levels at near-0-eV collisions.
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Airaksinen E, Wahlin A, Forsell Y, Larsson M. Low episodic memory performance as a premorbid marker of depression: evidence from a 3-year follow-up. Acta Psychiatr Scand 2007; 115:458-65. [PMID: 17498157 DOI: 10.1111/j.1600-0447.2006.00932.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To examine low episodic memory scores as a potential risk factor for depression. METHOD A population-based sample of non-depressed individuals (20-64 years) were re-examined 3 years after an initial screening (n = 708). At baseline, information on episodic memory scores, demographic and socioeconomic factors, alcohol use and anxiety diagnoses was collected. The data for depression diagnoses were collected at both baseline and follow-up. RESULTS Logistic regressions, conducted on three separate study groups that were defined according to three assessments of episodic memory (i.e. free + cued recall, free recall, cued recall) among individuals who scored in the 25 lowest or highest percentiles in the memory tests, revealed that low episodic memory performance defined as the sum of free and cued recalls of organizable words constitutes a risk of depression diagnosis 3 years later. CONCLUSION Low episodic memory performance predated depressive diagnosis and might be considered as a premorbid marker of depression.
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133
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Zhaunerchyk V, Geppert WD, Larsson M, Thomas RD, Bahati E, Bannister ME, Fogle MR, Vane CR, Osterdahl F. Three-body breakup in the dissociative recombination of the covalent triatomic molecular ion O3+. PHYSICAL REVIEW LETTERS 2007; 98:223201. [PMID: 17677840 DOI: 10.1103/physrevlett.98.223201] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2006] [Indexed: 05/16/2023]
Abstract
We report the first observation of almost exclusive three-body breakup in the dissociative recombination of a covalent triatomic molecular ion O3+. The three-body channel, constituting about 94% of the total reactivity, has been investigated in detail. The atomic fragments are formed in only the first two electronic states, 3P and 1D, while formation in the 1S state has not been observed. The breakup predominantly proceeds through dissociative states with linear geometry.
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134
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Hamberg M, Geppert WD, Thomas RD, Zhaunerchyk V, Österdahl F, Ehlerding A, Kaminska M, Semaniak J, Ugglas MA, Källberg A, Paal A, Simonsson A, Larsson M. Experimental determination of dissociative recombination reaction pathways and absolute reaction cross-sections of CH2OH + , CD2OD + and CD2. Mol Phys 2007. [DOI: 10.1080/00268970701206642] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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135
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Henriksson C, Lindahl B, Larsson M. Patients' and relatives' thoughts and actions during and after symptom presentation for an acute myocardial infarction. Eur J Cardiovasc Nurs 2007; 6:280-6. [PMID: 17478122 DOI: 10.1016/j.ejcnurse.2007.02.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Revised: 02/09/2007] [Accepted: 02/15/2007] [Indexed: 10/23/2022]
Abstract
BACKGROUND Relatives play an important role in deciding to seek medical care after the onset of symptoms of an acute myocardial infarction (AMI). OBJECTIVE The aim of this study was to gain deeper understanding of how AMI patients and their relatives think and act during and after onset of symptoms. METHODS Six focus group interviews were conducted with AMI patients (N=13) and relatives (N=14). Manifest content analysis was used to analyse the transcribed data. RESULTS The AMI patients experienced a variety of symptoms and both patients and relatives often felt uncertain about the origin of the symptoms, interpreted them as less serious conditions and tried to alleviate the discomfort in various ways. When symptoms continued the patients consulted a relative, who often decided to seek care. Many considered waiting for an ambulance was too long and the relative often drove the patients to the hospital. CONCLUSION Patients as well as relatives were insecure about AMI symptoms and how to act. All patients contacted a relative, who was more eager than the patient to seek help. Many preferred to go in their own car to the hospital, believing it to be faster than an ambulance. Information about AMI symptoms and recommended action should be given to the public and to AMI patients and their relatives.
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136
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Airaksinen E, Wahlin Å, Forsell Y, Larsson M. Low episodic memory performance as a premorbid marker of depression: Evidence from a 3-year follow-up. Eur Psychiatry 2007. [DOI: 10.1016/j.eurpsy.2007.01.739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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137
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Follows D, Tiberg F, Thomas RK, Larsson M. Multilayers at the surface of solutions of exogenous lung surfactant: Direct observation by neutron reflection. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2007; 1768:228-35. [PMID: 17156743 DOI: 10.1016/j.bbamem.2006.10.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2006] [Revised: 10/09/2006] [Accepted: 10/11/2006] [Indexed: 10/24/2022]
Abstract
Pharmacy-grade exogenous lung surfactant preparations of bovine and porcine origin, dispersed in physiological electrolyte solution have been studied. The organization and dynamics at the air/water interface at physiological temperature was analysed by neutron reflection. The results show that a well-defined surface phase is formed, consisting of a multilayer structure of lipid/protein bilayers alternating with aqueous layers, with a repetition period of about 70 A and correlation depths of 3 to >25 bilayers, depending on electrolyte composition and time. The experimental surfactant concentration of 0.15% (w/w) is far below that used in therapeutic application of exogenous surfactants and it is therefore likely that similar multilayer structures are also formed at the alveolar surface in the clinical situation during surfactant substitution therapy. Lung surfactant preparations in dry form swell in aqueous solution towards a limit of about 60% (w/w) of water, forming a lamellar liquid-crystalline phase above about 34 degrees C, which disperses into lamellar bodies at higher water concentrations. The lamellar spacings in the surface multilayers at the air/water interface are smaller than those in the saturated limit even though they are in contact with much greater water concentrations. The surface multilayers are laterally disordered in a way that is consistent with fragments of Lalpha-phase lamellae. The near surface layers of the multilayer structure have a significant protein content (only SP-B and SP-C are present in the preparations). The results demonstrate that a multilayer structure can be formed in exogenous surfactant even at very low concentrations and indicate that multilayers need to be incorporated into present interpretations of in vitro studies of similar lung surfactant preparations, which are largely based on monolayer models.
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138
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Ojekull J, Andersson PU, Någård MB, Pettersson JBC, Neau A, Rosén S, Thomas RD, Larsson M, Semaniak J, Osterdahl F, Danared H, Källberg A, Ugglas MA. Dissociative recombination of ammonia clusters studied by storage ring experiments. J Chem Phys 2006; 125:194306. [PMID: 17129102 DOI: 10.1063/1.2387174] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Dissociative recombination of ammonia cluster ions with free electrons has been studied at the heavy-ion storage ring CRYRING (Manne Siegbahn Laboratory, Stockholm University). The absolute cross sections for dissociative recombination of H+(NH3)2, H+(NH3)3, D+(ND3)2, and D+(ND3)3 in the collision energy range of 0.001-27 eV are reported, and thermal rate coefficients for the temperature interval from 10 to 1000 K are calculated from the experimental data and compared with earlier results. The fragmentation patterns for the two ions H+(NH3)2 and D+(ND3)2 show no clear isotope effect. Dissociative recombination of X+(NX3)2 (X=H or D) is dominated by the product channels 2NX3+X [0.95+/-0.02 for H+(NH3)2 and 1.00+/-0.02 for D+(ND3)2]. Dissociative recombination of D+(ND3)3 is dominated by the channels yielding three N-containing fragments (0.95+/-0.05).
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139
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Chi CN, Engström A, Gianni S, Larsson M, Jemth P. Two conserved residues govern the salt and pH dependencies of the binding reaction of a PDZ domain. J Biol Chem 2006; 281:36811-8. [PMID: 17018532 DOI: 10.1074/jbc.m607883200] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
PDZ domains are protein-protein interaction modules found in hundreds of human proteins. Their binding reactions are sensitive to variations in salt and pH but the basis of the respective dependence has not been clear. We investigated the binding reaction between PSD-95 PDZ3 and a peptide corresponding to a native ligand with protein engineering in conjunction with stopped-flow and equilibrium fluorimetry and found that the two conserved residues Arg-318 and His-372 were responsible for the salt and pH dependencies, respectively. The basis of the salt-dependent variation of the affinity was explored by mutating all charged residues in and around the peptide-binding pocket. Arg-318 was found to be crucial, as mutation to alanine obliterated the effect of chloride on the binding constants. The direct interaction of chloride with Arg-318 was demonstrated by time-resolved urea denaturation experiments, where the Arg-318 --> Ala mutant was less stabilized by addition of chloride as compared with wild-type PDZ3. We also demonstrated that protonation of His-372 was responsible for the increase of the equilibrium dissociation constant at low pH. Both chloride concentration and pH (during ischemia) vary in the postsynaptic density, where PSD-95 is present, and the physiological buffer conditions may thus modulate the interaction between PSD-95 and its ligands through binding of chloride and protons to the "molecular switches" Arg-318 and His-372, respectively.
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140
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Gustafsson O, Kindvall G, Larsson M, Senekowitsch J, Sigray P. An experimental investigation of predissociation effects in theA3Π-X3Σ-transition of PH. Mol Phys 2006. [DOI: 10.1080/00268978500103101] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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141
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Rehbinder H, Andersson J, Ericson S, Eriksson K, Forsgren C, Hårdemark B, Korevaar E, Larsson M, Liander A, Lundin A, Riddersporre J, Rosseau D, Sundgren C, Uhrdin J, Löf J. TH-C-230A-10: A General Software Framework for Investigations in Radiation Therapy Planning. Med Phys 2006. [DOI: 10.1118/1.2241873] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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142
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Wicher G, Larsson M, Fex Svenningsen A, Gyllencreutz E, Rask L, Aldskogius H. Low density lipoprotein receptor-related protein-2/megalin is expressed in oligodendrocytes in the mouse spinal cord white matter. J Neurosci Res 2006; 83:864-73. [PMID: 16463279 DOI: 10.1002/jnr.20774] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Lipoprotein receptor-related protein-2 (LRP2)/megalin is a member of the low density lipoprotein receptor (LDLR) family, and is essential in absorptive epithelia for endocytosis of lipoproteins, low molecular weight proteins, cholesterol and vitamins, as well as in cellular signaling. Previous studies have shown megalin expression in ependymal cells and choroid plexus. We have investigated megalin expression in the spinal cord of postnatal mice with immunohistochemistry and immunoblot. Antibodies recognizing either the cytoplasmic tail (MM6) or the extracellular domain (E11) of megalin labeled oligodendrocytes in the spinal cord white matter, in parallel with myelination. MM6 antibodies, predominantly labeled the nuclei, whereas E11 antibodies labeled the cytoplasm of these cells. MM6 antibodies labeled also nuclei of oligodendrocytes cultured from embryonic mouse spinal cord. Immunoblots of spinal cord showed intact megalin, as well as its carboxyterminal fragment, the part remaining after shedding of the extracellular domain of megalin. Megalin-immunoreactive oligodendrocytes also expressed presenilin 1, an enzyme responsible for gamma-secretase mediated endodomain cleavage. These findings show that spinal cord oligodendrocytes are phenotypically different from those in the brain, and indicate that megalin translocates signals from the cell membrane to the nucleus of oligodendrocytes during the formation and maintenance of myelin of long spinal cord pathways.
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143
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Unemo M, Savicheva A, Budilovskaya O, Sokolovsky E, Larsson M, Domeika M. Laboratory diagnosis of Neisseria gonorrhoeae in St Petersburg, Russia: inventory, performance characteristics and recommended optimisations. Sex Transm Infect 2006; 82:41-4. [PMID: 16461601 PMCID: PMC2563834 DOI: 10.1136/sti.2005.016345] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES To perform a comprehensive inventory of the number of samples, performance characteristics, and quality assurance of the laboratory diagnosis of Neisseria gonorrhoeae at five laboratories in St Petersburg and Leningradskaya Oblast, Russia, in 2004, and to recommend optimisations for an increased adherence to international evidence based recommendations of diagnostics. METHODS Surveillance data were obtained with questionnaire and site visits. For evaluation of the culture media utilised at the laboratories, N gonorrhoeae reference strains (n = 29) were used. RESULTS During 2004 the total numbers of N gonorrhoeae samples analysed at the five laboratories using microscopy of stained smears and culturing were 330 879 (407 positive) and 38 020 (420 positive), respectively. Four laboratories used a Russian non-selective culture medium-that is, Complegon, and one laboratory utilised Biocult-GC. Both media seemed suboptimal. Only two of the laboratories used any species confirmative assay. Antibiotic susceptibility testing of N gonorrhoeae was performed at only two of the laboratories and each year only occasional isolates were analysed. None of the laboratories comprised a complete laboratory quality assurance system. CONCLUSIONS According to international recommendations, the diagnosis of N gonorrhoeae in St Petersburg and Leningradskaya Oblast, Russia, is suboptimal. More samples need to be analysed by culturing on a highly nutritious and selective medium and, furthermore, species confirmation and antibiotic susceptibility testing should be more frequently performed. In addition, the utilised methods for culturing and antibiotic susceptibility testing, including medium and interpretative criteria used, ought to be optimised, standardised, and quality assured using systematic internal and external quality controls.
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144
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Karim A, Elfving A, Larsson M, Ni WX, Hansson GV. Compositional analysis of Si/SiGe quantum dots using STEM and EDX. ACTA ACUST UNITED AC 2006. [DOI: 10.1117/12.647318] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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145
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Wicher G, Larsson M, Rask L, Aldskogius H. Low-density lipoprotein receptor-related protein (LRP)-2/megalin is transiently expressed in a subpopulation of neural progenitors in the embryonic mouse spinal cord. J Comp Neurol 2006; 492:123-31. [PMID: 16196028 DOI: 10.1002/cne.20673] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The lipoprotein receptor LRP2/megalin is expressed by absorptive epithelia and involved in receptor-mediated endocytosis of a wide range of ligands. Megalin is expressed in the neuroepithelium during central nervous system (CNS) development. Mice with homozygous deletions of the megalin gene show severe forebrain abnormalities. The possible role of megalin in the developing spinal cord, however, is unknown. Here we examined the spatial and temporal expression pattern of megalin in the embryonic mouse spinal cord using an antibody that specifically recognizes the cytoplasmic part of the megalin molecule. In line with published data, we show expression of megalin in ependymal cells of the central canal from embryonic day (E)11 until birth. In addition, from E11 until E15 a population of cells was found in the dorsal part of the developing spinal cord strongly immunoreactive against megalin. Double labeling showed that most of these cells express vimentin, a marker for immature astrocytes and radial glia, but not brain lipid binding protein (BLBP), a marker for radial glial cells, or glial fibrillary acidic protein (GFAP), a marker for mature astrocytes. These findings indicate that the majority of the megalin-positive cells are astroglial precursors. Megalin immunoreactivity was mainly localized in the nuclei of these cells, suggesting that the cytoplasmic part of the megalin molecule can be cleaved following ligand binding and translocated to the nucleus to act as a transcription factor or regulate other transcription factors. These findings suggest that megalin has a crucial role in the development of astrocytes of the spinal cord.
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146
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Larsson M, Aneblom G, Eurenius K, Westerling R, Tydén T. The adoption of emergency contraceptive pills in Sweden: A repeated cross-sectional study among abortion applicants. Acta Obstet Gynecol Scand 2006; 85:1142-3. [PMID: 16929424 DOI: 10.1080/00016340500501897] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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147
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Geppert WD, Hamberg M, Thomas RD, Osterdahl F, Hellberg F, Zhaunerchyk V, Ehlerding A, Millar TJ, Roberts H, Semaniak J, af Ugglas M, Källberg A, Simonsson A, Kaminska M, Larsson M. Dissociative recombination of protonated methanol. Faraday Discuss 2006; 133:177-90; discussion 191-230, 449-52. [PMID: 17191449 DOI: 10.1039/b516010c] [Citation(s) in RCA: 164] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The branching ratios of the different reaction pathways and the overall rate coefficients of the dissociative recombination reactions of CH3OH2+ and CD3OD2+ have been measured at the CRYRING storage ring located in Stockholm, Sweden. Analysis of the data yielded the result that formation of methanol or deuterated methanol accounted for only 3 and 6% of the total rate in CH3OH2+ and CD3OD2+, respectively. Dissociative recombination of both isotopomeres mainly involves fragmentation of the C-O bond, the major process being the three-body break-up forming CH3, OH and H (CD3, OD and D). The overall cross sections are best fitted by sigma = 1.2 +/- 0.1 x 10(-15) E(-1.15 +/- 0.02) cm2 and sigma = 9.6 +/- 0.9 x 10(-16) E(-1.20 +/- 0.02) cm2 for CH3OH2+ and CD3OD2+, respectively. From these values thermal reaction rate coefficients of k(T) = 8.9 +/- 0.9 x 10(-7) (T/300)(-0.59 +/- 0.02) cm3 s(-1) (CH3OH2+) and k(T) = 9.1 +/- 0.9 x 10(-7) (T/300)(-0.63 +/- 0.02) cm3 s(-1) (CD3OD2+) can be calculated. A non-negligible formation of interstellar methanol by the previously proposed mechanism via radiative association of CH3+ and H2O and subsequent dissociative recombination of the resulting CH3OH2+ ion to yield methanol and hydrogen atoms is therefore very unlikely.
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148
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Larsson M, Bjällmark A, Winter R, Westholm C, Jacobsen P, Lind B, Brodin LÅ. Velocity tracking — A novel method for quantitative analysis of longitudinal myocardial function. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)84648-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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149
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Fogliata A, Nicolini G, Alber M, Asell M, Dobler B, El-Haddad M, Hårdemark B, Jelen U, Kania A, Larsson M, Lohr F, Munger T, Negri E, Rodrigues C, Cozzi L. IMRT for breast. A planning study. Radiother Oncol 2005; 76:300-10. [PMID: 16153730 DOI: 10.1016/j.radonc.2005.08.004] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2004] [Revised: 04/13/2005] [Accepted: 08/10/2005] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND PURPOSE To evaluate the performance of ten different treatment-planning systems when intensity modulated (IMRT) plans are designed for breast treatments that include the irradiation of the internal mammary chain. PATIENTS AND METHODS A dataset of five patients (CT images and volumes of interest) was distributed to design IMRT plans on the ten systems. To minimise biases, the same geometry and clinical planning aims were imposed on the individual plans. Results were analysed in terms of dose distributions and dose volume histograms. RESULTS AND CONCLUSIONS For target coverage, the volume receiving more than 95% of the prescribed dose ranged from 77% (OTP) to 91% (Eclipse and Pinnacle), the volume receiving more than 107% ranged from 3.3% (Hyperion) to 23.2% (OTP). The mean dose to ipsilateral lung ranged from 13 Gy (Eclipse) to 18 Gy (OTP). The volume of the contralateral breast receiving more than 10 Gy ranged from 3% (Pinnacle) to 26% (Precise). The volume of heart receiving more than 20 Gy ranged from 7% (Eclipse) to 47% (Precise), the maximum significant dose to heart ranged from approximately 27 Gy (XiO) to approximately 49 Gy (Precise). The maximum significant dose to healthy tissue ranged from approximately 51 Gy (Eclipse) to approximately 62 Gy (OTP). It was also possible to show that the treatment geometry proposed here enables to minimise contralateral breast irradiation while keeping minimal ipsilateral lung (or heart) involvement and satisfactory target coverage.
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Skoberne M, Beignon AS, Larsson M, Bhardwaj N. Apoptotic cells at the crossroads of tolerance and immunity. Curr Top Microbiol Immunol 2005; 289:259-92. [PMID: 15791960 DOI: 10.1007/3-540-27320-4_12] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Clearance of apoptotic cells by phagocytes can result in either anti-inflammatory and immunosuppressive effects or prostimulatory consequences through presentation of cell-associated antigens to T cells. The differences in outcome are due to the conditions under which apoptosis is induced, the type of phagocytic cell, the nature of the receptors involved in apoptotic cell capture, and the milieu in which phagocytosis of apoptotic cells takes place. Preferential ligation of specific receptors on professional antigen-presenting cells (dendritic cells) has been proposed to induce potentially tolerogenic signals. On the other hand, dendritic cells can efficiently process and present antigens from pathogen-infected apoptotic cells to T cells. In this review, we discuss how apoptotic cells manipulate immunity through interactions with dendritic cells.
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