| 1. |
- Morin, Maxim, et al.
(författare)
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Skin hydration dynamics investigated by electrical impedance techniques in vivo and in vitro
- 2020
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Ingår i: Scientific reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 10:1, s. 17218-
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Tidskriftsartikel (refereegranskat)abstract
- Skin is easily accessible for transdermal drug delivery and also attractive for biomarker sampling. These applications are strongly influenced by hydration where elevated hydration generally leads to increased skin permeability. Thus, favorable transdermal delivery and extraction conditions can be easily obtained by exploiting elevated skin hydration. Here, we provide a detailed in vivo and in vitro investigation of the skin hydration dynamics using three techniques based on electrical impedance spectroscopy. Good correlation between in vivo and in vitro results is demonstrated, which implies that simple but realistic in vitro models can be used for further studies related to skin hydration (e.g., cosmetic testing). Importantly, the results show that hydration proceeds in two stages. Firstly, hydration between 5 and 10 min results in a drastic skin impedance change, which is interpreted as filling of superficial voids in skin with conducting electrolyte solution. Secondly, a subtle impedance change is observed over time, which is interpreted as leveling of the water gradient across skin leading to structural relaxation/changes of the macromolecular skin barrier components. With respect to transdermal drug delivery and extraction of biomarkers; 1 h of hydration is suggested to result in beneficial and stable conditions in terms of high skin permeability and extraction efficiency.
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| 2. |
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| 3. |
- Gustafsson, Anna, et al.
(författare)
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Gas6 and the receptor tyrosine kinase Axl in clear cell renal cell carcinoma.
- 2009
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Ingår i: PloS one. - : Public Library of Science (PLoS). - 1932-6203. ; 4:10, s. e7575-
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The molecular biology of renal cell carcinoma (RCC) is complex and not fully understood. We have recently found that the expression of the receptor tyrosine kinase Axl in the RCC tumors independently correlates with survival of the patients. PRINCIPAL FINDINGS: Here, we have investigated the role of Axl and its ligand Gas6, the vitamin-K dependent protein product of the growth arrest-specific gene 6, in clear cell RCC (ccRCC) derived cells. The Axl protein was highly expressed in ccRCC cells deficient in functional von Hippel-Lindau (VHL) protein, a tumor suppressor gene often inactivated in ccRCC. VHL reconstituted cells expressed decreased levels of Axl protein, but not Axl mRNA, suggesting VHL to regulate Axl expression. Gas6-mediated activation of Axl in ccRCC cells resulted in Axl phosphorylation, receptor down-regulation, decreased cell-viability and migratory capacity. No effects of the Gas6/Axl system could be detected on invasion. Moreover, in ccRCC tumor tissues, Axl was phosphorylated and Gas6 gamma-carboxylated, suggesting these molecules to be active in vivo. SIGNIFICANCE: These results provide novel information regarding the complex function of the Gas6/Axl system in ccRCC.
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| 4. |
- Tengland, Per-Anders
(författare)
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Health promotion and disease prevention : A real difference in public health practice?
- 2007
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Konferensbidrag (refereegranskat)abstract
- There appears to be a practical, but also an ideological, difference between the professional activities of disease prevention and health promotion. Whether or not this distinction holds has to do with at least two things. First, it has to do with the concept of health and the concept of disease. Are they logically different (and only causally related), or are they just two extremes on one dimension? Second, it has to do with the practices of professionals. Are the methods and strategies used in health promotion different from those used in disease prevention, and are the targets, e.g. the whole population, sub-populations, communities, risk groups, of these methods and strategies different? In the paper it is argued that the difference is much smaller than is sometimes assumed. First a conceptual framework is suggested, where the concepts of health, illness and disease are defined, and it is shown that it does not follow logically from these definitions that disease prevention and health promotion require different methods and strategies. Then it is shown that differences in choice of target for interventions have other reasons, e.g. professional affiliation and ethical assumptions.
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| 5. |
- Westerlund, Tommy, et al.
(författare)
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Community pharmacy and primary health care in Sweden-at a crossroads
- 2020
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Ingår i: Pharmacy Practice. - : Centro Investigaciones & Publicaciones Farmaceuticas. - 1885-642X .- 1886-3655. ; 18:2, s. 1-8
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Tidskriftsartikel (refereegranskat)abstract
- The overall goal of Swedish health care is good health and equitable care for the whole population. The responsibility for health is shared by the central government, the regions, and the municipalities. Primary care accounts for approximately 20 percent of all expenditures on health care. About 16% of all physicians work in primary health. The regions have also employed a large number of clinical pharmacists, usually hospital-based, but many perform a variety of different primary care services, the most common of which is patient medication reviews. Swedish primary health care is at a crossroads facing extensive challenges, due to changes in demography and demanding financial conditions. These changes necessitate large transformations in health services and delivery. Current Government inquiries have primarily focused on two ways to meet the challenges; a shift towards more local care requiring a transfer of resources from hospital care, and a further development of structured digi-physical care, that is both digital (“online doctors”) and physical accessibility of care. While primary care at present is undergoing processes of change, community pharmacy has done so during the past decade since the re-regulation of the Swedish pharmacy market. A monopoly was replaced by a competitive system, where five pharmacy chains now share most of the market, a competition that has made community pharmacy very commercialized. A number of different, promising primary care services are being offered, but they are usually delivered on a small scale due to a lack of remuneration and philosophy of providers. Priority is given to sales and fast dispensing of prescriptions, often with a minimum of counseling. Reflecting primary health care, community pharmacy in Sweden is at a crossroads but currently has a golden opportunity to choose a route of collaboration with primary health care in its current transformation into more local and digiphysical care. A major challenge is that primary health care inquires, strategic plans, and national policy documents usually do not include community pharmacy as a partner. Hence, community pharmacy have to be proactive and seize this chance of changes in primary health policy and organization in order to become an important link in the chain of health care delivery, or there is a significant risk that it will predominantly remain a retail business. © 2020, Grupo de Investigacion en Atencion Farmaceutica. All rights reserved.
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| 6. |
- Olsson, Helena, et al.
(författare)
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Dental pulp capping : effect of Emdogain Gel on experimentally exposed human pulps
- 2005
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Ingår i: International Endodontic Journal. - : John Wiley & Sons. - 0143-2885 .- 1365-2591. ; 38:3, s. 186-194
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Tidskriftsartikel (refereegranskat)abstract
- AIM: To investigate the effect of Emdogain Gel (Biora AB, Malmo, Sweden), consisting of a enamel matrix derivative (EMD) in a propylene glycol alginate (PGA) vehicle, on experimentally exposed human pulps and to register postoperative symptoms. METHODOLOGY: Nine pairs of contralateral premolars scheduled for extraction on orthodontic indications were included. Following a superficial pulp amputation performed with a small (016) diamond bur, either EMDgel or a mix of calcium hydroxide and sterile saline was placed at random in contact with the pulp wound. The subjects made records of symptoms and were also interviewed about pain/discomfort by a blinded examiner. After 12 weeks the teeth were extracted, prepared and subjected to light microscopic examination in which the inflammation and newly formed hard tissue in the pulp were analysed. Immunohistochemistry was performed using affinity-purified rabbit anti-EMD polyclonal antibodies. RESULTS: Postoperative symptoms were less frequent in the EMDgel-treated than in the calcium hydroxide-treated teeth, especially during the first six weeks. In the EMDgel-treated teeth, new tissue partly filled the space initially occupied by the gel and hard tissue was formed alongside the exposed dentine surfaces and in patches in the adjacent pulp tissue. EMD was detected in the areas where new hard tissue had been formed. The wound area of the EMDgel-treated teeth exhibited inflammation in the majority of the teeth whereas less inflammation was seen in the calcium hydroxide-treated teeth where the hard tissue was formed as a bridge. CONCLUSIONS: In the EMDgel-treated teeth, postoperative symptoms were less frequent and the amount and pattern of hard tissue formation were markedly different than in the teeth treated with calcium hydroxide. However, the operative procedure and the formulation with EMD in a PGA vehicle do not seem to be effective for the formation of a hard tissue barrier.
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| 7. |
- Anders, Halldin, et al.
(författare)
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Improved osseointegration and interlocking capacity with dual acid treated implants: a rabbit study.
- 2016
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Ingår i: Clinical Oral Implants Research. - : Wiley. - 0905-7161 .- 1600-0501. ; 27, s. 22-30
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Tidskriftsartikel (refereegranskat)abstract
- Aim To investigate how osseointegration is affected by different nano- and microstructures. The hypothesis was that the surface structure created by dual acid treatment (AT-1), applied on a reduced topography, might achieve equivalent biomechanical performance as a rougher surface treated with hydrofluoric acid (HF). Materials and methods In a preclinical rabbit study, three groups (I, II, and III) comprised of test and control implants were inserted in 30 rabbits. The microstructures of the test implants were either produced by blasting with coarse (I) or fine (II) titanium particles or remained turned (III). All test implants were thereafter treated with AT-1 resulting in three different test surfaces. The microstructure of the control implants was produced by blasting with coarse titanium particles thereafter treated with HF. The surface topography was characterized by interferometry. Biomechanical (removal torque) and histomorphometric (bone–implant contact; bone area) performances were measured after 4 or 12 weeks of healing. Results Removal torque measurement demonstrated that test implants in group I had an enhanced biomechanical performance compared to that of the control despite similar surface roughness value (Sa). At 4 weeks of healing, group II test implants showed equivalent biomechanical performance to that of the control, despite a decreased Sa value. Group III test implants showed decreased biomechanical performance to that of the control. Conclusions: The results of the present study suggest that nano- and microstructure alteration by AT-1 on a blasted implant might enhance the initial biomechanical performance, while for longer healing time, the surface interlocking capacity seems to be more important.
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| 8. |
- Tegelberg, Åke, et al.
(författare)
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General practice dentists' knowledge of temporomandibular disorders in children and adolescents.
- 2007
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Ingår i: European journal of dental education : official journal of the Association for Dental Education in Europe. - : Wiley. - 1396-5883 .- 1600-0579. ; 11:4, s. 216-21
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Tidskriftsartikel (refereegranskat)abstract
- Aim: The aim of the study was to map general practice dentists' (GPDs) knowledge of temporomandibular disorders (TMD) in children and adolescents. Materials and methods: A questionnaire was mailed to 286 Swedish dentists in the Public Dental Service and 17 TMD specialists with documented research experience. The questionnaire contained 37 statements on aetiology, diagnostics, classification, chronic pain and pain behaviour, treatment, and prognosis. Each statement was judged on a 0-10 point scale with the endpoint definitions agree or disagree. Results: The overall response rate to the questionnaire was 87%. In 28 of all 37 statements, the TMD specialists endorsed a consensus, i.e. >75% of the specialists had the same opinion about the statement. TMD specialists differed most in opinion in the domain diagnostics and classification. In 65% of the statements, differences in knowledge between GPDs and TMD specialists were non-significant. The greatest number of significant between-group differences was found in the domain treatment and prognosis. Most of these statements were related to morphological factors. Conclusion: There is a high degree of consensus in TMD knowledge amongst the TMD specialists and a high degree of agreement in knowledge between GPDs and TMD specialists. In some areas, however, TMD specialists still need to reach a consensus which is founded on evidence-based TMD knowledge in children and adolescents and that can be used in undergraduate teaching. It is therefore important to develop and strengthen the undergraduate dental teaching in TMD and orofacial pain.
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| 9. |
- Mojumdar, Enamul Haque, et al.
(författare)
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Probing skin barrier recovery on molecular level following acute wounds : An in vivo/ex vivo study on pigs
- 2021
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Ingår i: Biomedicines. - : MDPI AG. - 2227-9059. ; 9:4
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Tidskriftsartikel (refereegranskat)abstract
- Proper skin barrier function is paramount for our survival, and, suffering injury, there is an acute need to restore the lost barrier and prevent development of a chronic wound. We hypothesize that rapid wound closure is more important than immediate perfection of the barrier, whereas specific treatment may facilitate perfection. The aim of the current project was therefore to evaluate the quality of restored tissue down to the molecular level. We used Göttingen minipigs with a multi-technique approach correlating wound healing progression in vivo over three weeks, monitored by classical methods (e.g., histology, trans-epidermal water loss (TEWL), pH) and subsequent physicochemical characterization of barrier recovery (i.e., small and wide-angle X-ray diffraction (SWAXD), polarization transfer solid-state NMR (PTssNMR), dynamic vapor sorption (DVS), Fourier transform infrared (FTIR)), providing a unique insight into molecular aspects of healing. We conclude that although acute wounds sealed within two weeks as expected, molecular investigation of stratum corneum (SC) revealed a poorly developed keratin organization and deviations in lipid lamellae formation. A higher lipid fluidity was also observed in regenerated tissue. This may have been due to incomplete lipid conversion during barrier recovery as glycosphingolipids, normally not present in SC, were indicated by infrared FTIR spectroscopy. Evidently, a molecular approach to skin barrier recovery could be a valuable tool in future development of products targeting wound healing.
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| 10. |
- Robertsson, Carolina, 1993-
(författare)
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Responses to External Cues in Oral Bacteria
- 2023
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis investigates responses to external cues in oral bacteria on a molecular level. Paper I maps Ser/Thr/Tyr phosphorylated proteins in relation to the general proteome in an oral commensal streptococcus (Streptococcus gordonii DL1). The identified phosphoproteins were involved in various bacterial processes, several associated to dysbiosis and development of biofilm-induced disease. Comparison against phosphoproteomes of other bacteria showed many similarities. This is of interest for the identification of shared phosphorylation profiles. Paper II studies differences between the S. gordonii DL1 general proteomes in planktonic and biofilm growth phases, and the regulatory effects of salivary mucin MUC5B on protein expression in the biofilm cells. Regulations in protein expression between the different growth conditions provides insights in bacterial mechanisms for adaptation to the biofilm lifestyle. Paper III examines the regulatory roles of salivary MUC5B on biofilm attachment and metabolic output in two clinical isolates of oral commensals, S. gordonii CW and Actinomyces naeslundii CW. S. gordonii facilitated adhesion of A. naeslundii to MUC5B during early attachment. Both bacteria were also able to utilize MUC5B as a sole nutrient source during early biofilm formation, individually and synergistically in a dual species biofilm. The specific responses elicited by MUC5B in paper II-III seem to promote commensal colonization while down-regulating dysbiosis-related biofilm activities. Microbiological studies are often focused on dysbiosis and development of disease. However, mechanisms that promote eubiosis are equally important to understand how health can be maintained. Findings associated with responses to external cues in oral bacteria may contribute to future development of novel preventative strategies and identification of predictive biomarkers for oral health.
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