| 1. |
- Zhao, Qinghai, et al.
(författare)
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Effects of dextranation on the pharmacokinetics of short peptides : A PETstudy on mEGF
- 1999
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Ingår i: Bioconjugate chemistry. - : American Chemical Society (ACS). - 1043-1802 .- 1520-4812. ; 10:6, s. 938-946
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Tidskriftsartikel (refereegranskat)abstract
- The effects of dextranation on the biodistribution of mouse epidermal growth factor (mEGF, 6 kDa) were assessed. By reductive amination, mEGF was coupled to 13 and 46 kDa dextran. The two dextranated conjugates and free mEGF were labeled with the positron-emitting nuclide (76)Br (T(1/2) = 16 h). After intravenous administration to Sprague Dawley rats, the radioactivity biodistribution was evaluated by positron emission tomography (PET) and by measurements of dissected tissues. The dextranation prolonged the retention time in blood, especially when the dextran chain was long. [(76)Br]mEGF-dextran conjugates were shown to have significantly, more than 5 times, lower kidney accumulation than the nonconjugated [(76)Br]mEGF. In conclusion, dextranation affects the biodistribution of mEGF in vivo giving a prolonged circulation time, a decreased uptake in kidney, and an increased spleen accumulation.
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| 2. |
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| 3. |
- Carlsson, Jörgen, et al.
(författare)
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Conjugate chemistry and cellular processing of EGF-dextran
- 1999
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Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 38:3, s. 313-321
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Tidskriftsartikel (refereegranskat)abstract
- Conjugates with specific binding to the epidermal growth factor receptor, EGFR, of interest for radionuclide based imaging and therapy were prepared using mouse epidermal growth factor, mEGF, and dextran. In one type of conjugate, mEGF was coupled to dextran by reductive amination in which the free amino group on the mEGF N-terminal reacted with the aldehyde group on the reductive end of dextran. The end-end coupled conjugate could be further activated by the cyanopyridinium agent CDAP, thereby introducing tyrosines to the dextran part. In the other type of conjugate, the cyanylating procedure using CDAP was applied, first to activate dextran and then allowing for the amino terminus of mEGF to randomly attach to the dextran. In the latter case, radionuclide-labelled tyrosines or glycines could be added in the same conjugation step. All types of mEGF-dextran conjugates had EGFR-specific binding since the binding could be displaced by an excess of non-radioactive mEGF. The conjugates were to a large extent internalized in the test cells and the associated radioactivity was retained intracellularly for different times depending on both the type of cells and conjugate applied. Different intracellular 'traffic routes' for the radionuclides are discussed as well as applications for both imaging and therapy.
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| 4. |
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| 5. |
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| 6. |
- Hofman-Bang, Claes, et al.
(författare)
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Two year results of a controlled study of a residential rehabilitation for patients treated with percutaneous transluminal coronary angioplasty : A randomized study of a multifactorial programme
- 1999
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Ingår i: European Heart Journal. - : Oxford University Press (OUP). - 0195-668X .- 1522-9645. ; 20:20, s. 1465-1474
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Tidskriftsartikel (refereegranskat)abstract
- Aims In a multifactorial lifestyle behaviour programme, of 2 years duration, to study the maintenance of achieved behaviour and risk factor-related changes. Methods and Results Out of a consecutive population of 151 patients treated with percutaneous transluminal angioplasty under 65 years of age, 87 were randomly allocated to an intervention group (n=46) or to a control group (n=41). The programme started with a 4 week residential stay, which was focused on health education and the achievement of behaviour change. During the first year of follow-up, a maintenance programme included regular contacts with a nurse, while no further rehabilitative efforts were offered during the second year. One patient died (control). During the second year the proportion of hospitalized patients was lower in the intervention group (4% vs 20%;P<0·05). Patients in the intervention group improved several lifestyle dependent behaviours: diet (index at 0, 12 and 24 months): 10·5±3·4, 12·9±2·5 and 12·4±2·6 in the intervention group (I) vs 10·1±3·2, 10·7±3·0 and 11·8±3·2 in the control group (C);P<0·05, exercise sessions per week: 2·5±2·3, 4·5±1·9 and 4·4±2·1 (I) vs 3·1±2·2, 3·5±2·3 and 3·7±2·7 (C);P<0·05, and smoking; 18%, 6% and 9% (I) vs 12%, 21% and 18% (C);P<0·05. This corresponded to improvement in exercise capacity (0, 12 and 24 months): 156±42, 174±49 and 165±47W (I) vs 164±40, 163±49 and 156±48 watts (C);P<0·05. There were no significant differences between the two groups with regard to serum cholesterol levels at 0 and 24 months: 5·4±0·8 and 5·2±0·9mmol.l–1(I) vs 5·4±1·0 and 4·9±0·9mmol.l–1(C); ns, low density lipoprotein cholesterol level: 3·6±0·8 and 3·4±0·8mmol.l–1(I) vs 3·7±0·9 and 3·3±0·7mmol.l–1(C); ns, triglyceride level: 2·2±1·6 and 1·8±1·3mmol.l–1(I) vs 2·2±1·4 and 1·6±0·6mmol.l–1(C); ns, body mass index (0, 12 and 24 months): 27·5±4·5, 27·0±4·3 and 27·4± 4·5kg.m–2(I) vs 26·8±2·8, 26·9±2·7 and 26·9± 3·2kg.m–2(C); ns, waist/hip ratio or blood pressure. The two groups did not differ in quality of life, or psychological factors. Return to work after 12 and 24 months was 74% and 78% (I) vs 68% and 61% (C); ns. Conclusion This rehabilitation programme influenced important lifestyle behaviour and reduced some, but not all, important risk factors Key Words: Rehabilitation, risk factors
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| 7. |
- Kvarnström, Lasse, et al.
(författare)
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Historia i Linköping
- 1999
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- Forskningsinriktningen vid den historiska avdelningen vid Linköpings universitet har sedan länge en stark socialhistorisk profil. kollektivens vardag studeras på en rad områden, på olika nivåer och över sinsemellan skilda tidsperioder. Det gäller inom såväl agrara som industriella miljöer, på samhällelig liksom på grupp-, familje- och individnivå samt över tid som omspänner senantiken till det sena 1900-talets historia. Hur identiteter skapas, tillägnas och förändras är en alltmer växande inriktning, liksom anknytningen till socialpolitiska ideer, normsystem, attityder, värderingar och mentaliteter. Även den rättshistoriska och ekonomiskhistoriska forskningen ryms inom detta fält. Den historiska demografin utgör också traditionellt en stark del av det socialhistoriska fältet. Studier av arbeta och ohälsa, sjuklighet, dödlighet och hälsopolitik ligger långt framme. Bredden i den socialhistoriska profilen morsvaras av en mångfald melodologiska inslag.Skriftserien Socialhistoria i Linköping uppmärksammar denna profil och vilka uttryck den tar sig i grundutbildningen. I serien publiceras i första hand uppsatser skrivna på C- och D- nivå, men även bidrag från lärare och doktorander vid avdelningen förekommer.Detta nummer av Socialhistoria i Linköping är en specialutgåva till Svenska historikermötet i Linköping 23-25 april 1999
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| 8. |
- Lisspers, Jan, et al.
(författare)
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Behavioral effects of a comprehensive, multifactorial program for lifestyle change after percutaneous transluminal coronary angioplasty : A prospective, randomized, controlled study
- 1999
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Ingår i: Journal of Psychosomatic Research. - 0022-3999. ; 46:2, s. 143-154
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Tidskriftsartikel (refereegranskat)abstract
- A group of 93 coronary patients recently treated with percutaneous transluminal coronary angioplasty (PTCA) were randomly assigned to either an intervention or a control group. Subjects in the intervention group participated in a comprehensive behaviorally oriented program aimed at achieving significant long-term changes in risk factor–related lifestyle behavior. Assessments of lifestyle behaviors, psychological factors, biological risk factors, and rehabilitation as well as secondary prevention endpoints were carried out, at inclusion and after 12 months. Results showed that the intervention patients, as compared with controls, improved significantly on measures assessing smoking, exercise, and diet habits. These self-rated changes were confirmed by weight reductions and improved exercise capacity, as well as by between-group differences in subclinical chest pain during an exercise test. However, few effects were found on the different psychological variables, as well as on morbidity or return to work.
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| 9. |
- Lisspers, Jan, et al.
(författare)
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Multifactorial evaluation of a program for lifestyle behavior change in rehabilitation and secondary prevention of coronary artery disease
- 1999
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Ingår i: Scandinavian Cardiovascular Journal. - : Informa UK Limited. - 1401-7431 .- 1651-2006. ; 33:1, s. 9-16
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Tidskriftsartikel (refereegranskat)abstract
- A comprehensive, multifactorial lifestyle behavior change program was developed for rehabilitation and secondary prevention of subjects with coronary artery disease. The purpose of the present report is to describe this intervention model and to analyze results achieved in a first group of consecutive participants. Main inclusion criteria for the 292 subjects were a recent history of acute myocardial infarction, coronary artery bypass surgery, or percutaneous transluminal coronary angioplasty. The program commenced with a 4-week residential stay, with the focus on health education and the achievement of behavior change in major lifestyle areas. During the year of follow-up a systematic maintenance program included regular contact with a nurse. Morbidity and mortality was low. Self-reported quality of life improved and there were significant improvements in blood lipids, exercise capacity and body mass index. There were also significant changes both in psychological variables such as Type A behavior, anger, hostility, and in major lifestyle areas such as stress reactions, diet, exercise and smoking. These changes compared favorably with data from relevant samples from the Swedish normal population. This program had a considerable effect on a number of important factors for rehabilitation and secondary prevention of coronary artery disease.
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| 10. |
- Lisspers, Jan, et al.
(författare)
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The effects on and off depression : An Exploratory Study of Rehabilitation and Secondary Prevention in Coronary Artery Disease
- 1999
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Ingår i: Scandinavian Journal of Behaviour Therapy. - : Informa UK Limited. - 0284-5717. ; 28:1, s. 9-18
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Tidskriftsartikel (refereegranskat)abstract
- Forty consecutive participants in a comprehensive, behaviourally oriented coronary rehabilitation and secondary prevention program were followed for three years. Changes in depression (as measured with the Beck Depression Inventory) as well as the influence of baseline levels of depression on achieved changes in lifestyle behaviour and on rehabilitation and secondary prevention effects were analyzed. Subjects with moderate levels of baseline depression experienced short-term reductions of depression, which was maintained at the 12-month follow-up. Clinically depressed subjects experienced less positive results, with smaller immediate reductions as well as relapse to baseline levels after 12 months, specifically in non-physical, cognitive-affective depression symptoms. There were, however, no differences in lifestyle changes or in hospital treatment between groups with different pre-treatment depression levels. These results are discussed in relation to earlier research on the detrimental effects of depression on the prognosis of coronary artery disease.
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| 11. |
- Lubberink, Mark, et al.
(författare)
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Positron emission tomography and radioimmunotargeting : aspects ofquantification and dosimetry
- 1999
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Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 38:3, s. 343-349
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Tidskriftsartikel (refereegranskat)abstract
- Positron emission tomography (PET) is a medical imaging tool with high resolution and good quantitative properties, which makes it suitable for in vivo quantification of radioimmunotargeting agents. Most radionuclides used in radioimmunotherapy have positron-emitting analogues, which can be used for PET imaging, and this opens the possibility of performing dosimetry with PET. These isotopes, however, often emit gamma radiation and high-energy positrons in their decay, influencing the imaging properties of PET. Spatial resolution, reconstructed background and line source recovery for a number of non-pure positron emitters were investigated and compared with the imaging properties of 18F. PET imaging properties did not degrade severely for these non-pure positron emitters, but caution has to be applied when doing quantitative measurements. To assess the possibility of conducting PET studies during therapy, by combining, for example, a small amount of 124I with 131I, the influence of the presence of large amounts of gamma radiation on PET count rate characteristics was studied. The results of these studies were related to the necessary amounts of radioactivity needed for treatment of post-operative remains of glioma. The results indicate that the count rate capabilities of 2D PET permit PET studies for dose evaluation during radioimmunotherapy.
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| 12. |
- Lundqvist, Hans, et al.
(författare)
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Positron emission tomography and radioimmunotargeting : general aspects
- 1999
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Ingår i: Acta Oncologica. - 0284-186X .- 1651-226X. ; 38:3, s. 335-341
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Tidskriftsartikel (refereegranskat)abstract
- To optimize radioimmunotherapy, in vivo information on individual patients, such as radionuclide uptake, kinetics, metabolic patterns and optimal administration methods, is important. An overriding problem is to determine accurately the absorbed dose in the target organ as well as critical organs. Positron Emission Tomography (PET) is a superior technique to quantify regional kinetics in vivo with a spatial resolution better than 1 cm3 and a temporal resolution better than 10 s. However, target molecules often have distribution times of several hours to days. Conventional PET nuclides are not applicable and alternative positron-emitting nuclides with matching half-lives and with suitable labelling properties are thus necessary. Over many years we have systematically developed convenient production methods and labelling techniques of suitable positron nuclides, such as 110In(T(1/2) = 1.15 h), 86Y(T(1/2) = 14 h), 76Br(T(1/2) = 16 h) and 124I(T(1/2) = 4 days). 'Dose planning' can be done, for example, with 86Y- or 124I-labelled ligands before therapy, and 90Y- and 131I-labelled analogues and double-labelling, e.g. with a 86Y/90Y-labelled ligand, can be used to determine the true radioactivity integral from a pure beta-emitting nuclide. The usefulness of these techniques was demonstrated in animal and patient studies by halogen-labelled MAbs and EGF-dextran conjugates and peptides chelated with metal ions.
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| 13. |
- Nilsson, Hans, 1955-
(författare)
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Mot bättre hälsa : Dödlighet och hälsoarbete i Linköping 1860-1894
- 1994
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The decline in mortality was the most important cause of the great increase in population in Sweden in the 19th century. Especially important was the part played by the decline in infant mortality and mortality among small children. The purpose of this study has been to investigate on the basis of a local example, Linköping during the period 1860-94, the changes in morbidity and mortality in different population groups, and to analyse what factors played a significant role in bringing about the changes. The study is not only epidemiological. It also deals with new technology, new ideas and different actors. The focus is on three arenas: the societal level, the environmental level and the individual level. By the societal level is meant the central arena and the decisions that were taken there. The environmental level contains the study of local public health and a reconstruction of how water and drainage progressed and what properties it came to year by year. The individual level involves the study of a number of variables which the individuals themselves can have influenced in different degrees.
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| 14. |
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| 17. |
- Sundin, Rikard
(författare)
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Phylogenetic and taxonomic studies within Arthonia Ach. (Ascomycetes, Arthoniales)
- 1999
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The taxonomy and phylogeny of the genus Arthonia was analysed. As a first step, a phylogenetic analysis was performed to test the monophyly of some of the infrageneric groups suggested by earlier authors. The results strongly support that Arthonia, Arthothelium and Arthoniaceae are paraphyletic. Five monophyletic clades were revealed within Arthonia. The best supported clade , Arthonia sect. Arthonia, consisted of non-lichenized or poorly lichenized pioneer species, including the type species of Arthonia, A. radiata.A taxonomic revision of this clade in Europe, northern Africa and North America is presented. Descriptions, distribution maps and photographs are given for the 27 recognised species. The systematic history of Arthonia and Arthothelium is reviewed. The morphology, anatomy, chemistry, ecology and distribution patterns of Arthonia sect. Arthonia are described. Keys are given to the genera within Arthoniaceae, to infrageneric groups within Arthonia and to the treated species. A phylogenetic analysis of the 27 recognized species is presented, based on 57 morphological, anatomical, chemical and ecological characters. The analysis resulted in 311 most parsimonious trees. In the strict consensus tree section Arthonia is monophyletic receiving a Bremer support value of two. Arthonia reniformis and A. ruana constitute the sister group of section Arthonia. Relationships within section Arthonia are not fully resolved. A new species, Arthonia tehleri, is described. The following species of Arthothelium are transferred to Arthonia sect. Arthonia: Arthothelium beccarianum (syn. A. sardoum), A. lirellans, A. orbilliferum, A. phlyctiformis (syn. A. taediosoides), and A. subastroideum. The following names have to be changed due to priority reasons: Arthonia crozalsiana (to Arthonia albopulverea), A. epipastoides (to A. glaucella), A. sardoa (to A. beccariana), Arthothelium taediosoides (to Arthonia phlyctiformis).
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