| 1. |
- Bexell, Daniel, et al.
(författare)
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Stem cell-based therapy for malignant glioma.
- 2013
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Ingår i: Cancer Treatment Reviews. - : Elsevier BV. - 1532-1967 .- 0305-7372. ; 39:4, s. 358-365
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Forskningsöversikt (refereegranskat)abstract
- Stem cells have been extensively investigated as tumour-tropic vectors for gene delivery to solid tumours. In this review, we discuss the potential for using stem cells as cellular vector systems in gene therapy for malignant gliomas, with a focus on neural stem cells, and multipotent mesenchymal stromal cells. Tumour cell-derived substances and factors associated with tumour-induced inflammation and tumour neovascularisation can specifically attract stem cells to invasive gliomas. Injected stem cells engineered to produce anti-tumour substances have shown strong therapeutic effects in experimental glioma models. However, the potential caveats include the immunosuppressive functions of multipotent mesenchymal stromal cells, the contribution of stem cells to the pro-tumourigenic stroma, and the malignant transformation of implanted stem cells. In addition, it is not yet known which stem cell types and therapeutic genes will be most effective for the treatment of glioma patients. Here, we highlight the possibilities and problems for translating promising experimental findings in glioma models into the clinic.
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| 2. |
- Giwercman, Yvonne, et al.
(författare)
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Androgeninsensitivitetssyndrom.
- 2008
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Ingår i: Tidsskrift for den Norske Laegeforening. - 0807-7096. ; 128:5, s. 581-585
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Forskningsöversikt (refereegranskat)abstract
- BACKGROUND: Androgen insensitivity is caused by mutations in the androgen receptor gene, and is a common etiological factor to ambiguous genitalia in the newborn. This article discusses the role of androgens in sex differentiation, the structure and function of the androgen receptor, the genetic background to androgen insensitivity as well as clinical aspects. MATERIAL AND METHODS: The article is based on literature retrieved from PubMed, the androgen receptor mutation database and the authors' own research and clinical experience. RESULTS AND DISCUSSION: Androgen insensitivity encompasses a wide spectrum of clinical manifestations. Besides exclusion of possible differential diagnosis, the diagnostic work-up includes a clinical assessment of the androgen receptor's susceptibility to androgen stimulation as well as molecular genetic analysis of the androgen receptor gene. The condition should be managed with a multidisciplinary approach by teams competent to treat children with disorders of sexual development.
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| 3. |
- Jakobsson, Johan, et al.
(författare)
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Potential physiological and cellular mechanisms of exercise that decrease the risk of severe complications and mortality following sars-cov-2 infection
- 2021
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Ingår i: Sports. - : MDPI. - 2075-4663. ; 9:9
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Forskningsöversikt (refereegranskat)abstract
- The coronavirus disease 2019 (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has unmasked mankind's vulnerability to biological threats. Although higher age is a major risk factor for disease severity in COVID-19, several predisposing risk factors for mortality are related to low cardiorespiratory and metabolic fitness, including obesity, cardiovascular disease, diabetes, and hypertension. Reaching physical activity (PA) guideline goals contribute to protect against numerous immune and inflammatory disorders, in addition to multi-morbidities and mortality. Elevated levels of cardiorespiratory fitness, being non-obese, and regular PA improves immunological function, mitigating sustained low-grade systemic inflammation and age-related deterioration of the immune system, or immunosenescence. Regular PA and being non-obese also improve the antibody response to vaccination. In this review, we highlight potential physiological, cellular, and molecular mechanisms that are affected by regular PA, increase the host antiviral defense, and may determine the course and outcome of COVID-19. Not only are the immune system and regular PA in relation to COVID-19 discussed, but also the cardiovascular, respiratory, renal, and hormonal systems, as well as skeletal muscle, epigenetics, and mitochondrial function.
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| 4. |
- Lennerstrand, Johan, et al.
(författare)
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Hur har omikron uppstått och varför sprider den sig så snabbt? : Fyra hypoteser om variantens ursprung och tänkbara mekanismer bakom den snabba spridningen presenteras [How did Omicron evolve and why does this SARS-CoV-2 variant spread so fast?]
- 2022
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Ingår i: Läkartidningen. - : Sveriges Läkarförbund. - 0023-7205 .- 1652-7518. ; 119
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Forskningsöversikt (refereegranskat)abstract
- Omicron has more than twenty new mutations in the S1 domain of the spike gene as compared to the other previously known variants of SARS-CoV-2. Many of these new mutations, especially those located in the receptor binding domain, are likely to improve binding to the ACE2 receptor and to avoid binding to antibodies induced by a previous infection or by vaccination. Today there are several different hypotheses about the origin of Omicron, for example that it would have arisen in an immunosuppressed individual. Alternatively, a SARS-CoV-2 variant could have infected an unknown animal, and re-infection of humans would then have occurred. Furthermore, Omicron may have picked up a piece of a human common cold coronavirus. The hitherto available data suggest that the rapid spread of Omicron is a combination of properties of the virus replication ability in addition to its ability to avoid pre-existing immune responses.
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| 5. |
- Nordgren, Johan, et al.
(författare)
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Genetic Susceptibility to Human Norovirus Infection: An Update
- 2019
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Ingår i: Viruses. - : MDPI. - 1999-4915. ; 11:3
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Forskningsöversikt (refereegranskat)abstract
- Noroviruses are the most common etiological agent of acute gastroenteritis worldwide. Despite their high infectivity, a subpopulation of individuals is resistant to infection and disease. This susceptibility is norovirus genotype-dependent and is largely mediated by the presence or absence of human histo-blood group antigens (HBGAs) on gut epithelial surfaces. The synthesis of these HBGAs is mediated by fucosyl- and glycosyltransferases under the genetic control of the FUT2 (secretor), FUT3 (Lewis) and ABO(H) genes. The so-called non-secretors, having an inactivated FUT2 enzyme, do not express blood group antigens and are resistant to several norovirus genotypes, including the predominant GII.4. Significant genotypic and phenotypic diversity of HBGA expression exists between different human populations. Here, we review previous in vivo studies on genetic susceptibility to norovirus infection. These are discussed in relation to population susceptibility, vaccines, norovirus epidemiology and the impact on public health.
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| 6. |
- Ohlsson, Claes, 1965, et al.
(författare)
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The role of liver-derived insulin-like growth factor-I.
- 2009
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Ingår i: Endocrine reviews. - : The Endocrine Society. - 1945-7189 .- 0163-769X. ; 30:5, s. 494-535
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Forskningsöversikt (refereegranskat)abstract
- IGF-I is expressed in virtually every tissue of the body, but with much higher expression in the liver than in any other tissue. Studies using mice with liver-specific IGF-I knockout have demonstrated that liver-derived IGF-I, constituting a major part of circulating IGF-I, is an important endocrine factor involved in a variety of physiological and pathological processes. Detailed studies comparing the impact of liver-derived IGF-I and local bone-derived IGF-I demonstrate that both sources of IGF-I can stimulate longitudinal bone growth. We propose here that liver-derived circulating IGF-I and local bone-derived IGF-I to some extent have overlapping growth-promoting effects and might have the capacity to replace each other (= redundancy) in the maintenance of normal longitudinal bone growth. Importantly, and in contrast to the regulation of longitudinal bone growth, locally derived IGF-I cannot replace (= lack of redundancy) liver-derived IGF-I for the regulation of a large number of other parameters including GH secretion, cortical bone mass, kidney size, prostate size, peripheral vascular resistance, spatial memory, sodium retention, insulin sensitivity, liver size, sexually dimorphic liver functions, and progression of some tumors. It is clear that a major role of liver-derived IGF-I is to regulate GH secretion and that some, but not all, of the phenotypes in the liver-specific IGF-I knockout mice are indirect, mediated via the elevated GH levels. All of the described multiple endocrine effects of liver-derived IGF-I should be considered in the development of possible novel treatment strategies aimed at increasing or reducing endocrine IGF-I activity.
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| 7. |
- Olausson, Alexander, et al.
(författare)
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Total opioid-free general anaesthesia can improve postoperative outcomes after surgery, without evidence of adverse effects on patient safety and pain management : a systematic review and meta-analysis
- 2022
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley-Blackwell Publishing Inc.. - 0001-5172 .- 1399-6576. ; 66:2, s. 170-185
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Forskningsöversikt (refereegranskat)abstract
- BACKGROUND: Opioid-based treatment is used to manage stress responses during surgery and postoperative pain. However, opioids have both acute and long-term side-effects, calling for opioid-free anaesthetic strategies. This meta-analysis compares adverse events, postoperative recovery, discharge time from post-anaesthesia care unit, and postoperative pain, nausea, vomiting, and opioid consumption between strict opioid-free with opioid-based general anaesthesia.METHODS: We conducted a systematic review and meta-analysis. We searched PubMed, Embase, Cinahl, Cochrane Library, selected reference lists, and Google Scholar. We included randomised controlled trials (RCTs) published between January 2000 and February 2021 with at least one opioid-free study arm, i.e. no opioids administered preoperatively, during anaesthesia induction, before skin closure, or before emergence from anaesthesia.RESULTS: The study comprised 1934 patients from 26 RCTs. Common interventions included laparoscopic gynaecological surgery, upper gastrointestinal surgery, and breast surgery. There is firm evidence that opioid-free anaesthesia significantly reduced adverse post-operative events (OR 0.32, 95% CI 0.22 to 0.46, I2 =56%, p<0.00001), mainly driven by decreased nausea (OR 0.27, (0.17 to 0.42), p<0,00001) and vomiting (OR 0.22 (0.11 to 0.41), p<0.00001). Postoperative opioid consumption was significantly lower in the opioid-free group (-6.00 mg (-8.52 to -3.48), p<0.00001). There was no significant difference in length of post-anaesthesia care unit stay and overall postoperative pain between groups.CONCLUSIONS: Opioid-free anaesthesia can improve postoperative outcomes in several surgical settings without evidence of adverse effects on patient safety and pain management. There is a need for more evidence-based non-opioid anaesthetic protocols for different types of surgery as well as postoperative phases.
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| 8. |
- Rönnelid, Johan, et al.
(författare)
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Antikroppar mot citrullinerade proteiner - genombrott i reumatologisk diagnostik
- 2004
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Ingår i: Läkartidningen. - 0023-7205 .- 1652-7518. ; 101:50, s. 4092-4096
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Forskningsöversikt (refereegranskat)abstract
- Antibodies directed against citrullinated proteins (anti-CP) constitute a newly defined group of autoantibodies with very high diagnostic specificity for rheumatoid arthritis (RA). The most recently developed assays have a sensitivity comparable to that of traditional tests for Rheumatoid Factor (RF). Due to its considerably higher specificity, the authors recommend that anti-CP antibody analysis should replace the RF test in primary healthcare when investigating cases of clinically suspect RA.
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| 9. |
- Sharma, Sumit, et al.
(författare)
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The Impact of Human Genetic Polymorphisms on Rotavirus Susceptibility, Epidemiology, and Vaccine Take
- 2020
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Ingår i: VIRUSES-BASEL. - : MDPI. ; 12:3
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Forskningsöversikt (refereegranskat)abstract
- Innate resistance to viral infections can be attributed to mutations in genes involved in the immune response, or to the receptor/ligand. A remarkable example of the latter is the recently described Mendelian trait resistance to clinically important and globally predominating genotypes of rotavirus, the most common agent of severe dehydrating gastroenteritis in children worldwide. This resistance appears to be rotavirus genotype-dependent and is mainly mediated by histo-blood group antigens (HBGAs), which function as a receptor or attachment factors on gut epithelial surfaces. HBGA synthesis is mediated by fucosyltransferases and glycosyltransferases under the genetic control of the FUT2 (secretor), FUT3 (Lewis), and ABO (H) genes on chromosome 19. Significant genotypic and phenotypic diversity of HBGA expression exists between different human populations. This genetic diversity has an effect on genotype-specific susceptibility, molecular epidemiology, and vaccine take. Here, we will discuss studies on genetic susceptibility to rotavirus infection and place them in the context of population susceptibility, rotavirus epidemiology, vaccine take, and public health impact.
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| 10. |
- Svensson, Johan, 1964, et al.
(författare)
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Growth hormone and the cardiovascular function.
- 2005
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Ingår i: Minerva endocrinologica. - 0391-1977. ; 30:1, s. 1-13
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Forskningsöversikt (refereegranskat)abstract
- In this review, the great importance of growth hormone (GH) for the maintenance of cardiac function in adult life is discussed. Physiological effects of GH are discussed as well as the cardiac dysfunction caused both by GH excess (acromegaly) and by GH deficiency in adult hypopituitary patients. In both acromegaly and adult GH deficiency, there is also increased cardiovascular morbidity and mortality. Finally, the effect of GH treatment in heart failure is discussed.
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