1
|
Bohlin KP, Pohanka A, Andersson A, Villén T, Ekström L. Detection of anabolic agents including selective androgen receptor modulators in samples outside of sport. Drug Test Anal 2023. [PMID: 37986708 DOI: 10.1002/dta.3600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 10/16/2023] [Accepted: 10/21/2023] [Indexed: 11/22/2023]
Abstract
Selective androgen receptor modulators (SARMs) are prohibited by the World Anti-Doping Agency (WADA) since 2008. Similarly, to anabolic androgenic steroids (AAS), SARMs are detrimental to health not only in athletes but also in the general population. However, studies of the occurrence of SARMs outside of sport are scarce. Swedish healthcare samples from the Drugs of Abuse Laboratory at Karolinska were analyzed using WADA-accredited screening methods at the Doping Control Laboratory in Stockholm to estimate the frequency of SARM use outside of the WADA laboratories. Twenty (4%) of the male urine samples (n = 542) were positive for SARMs, whereas none of the analyzed female samples (n = 100) contained any SARMs. The top three SARMs found were LGD-4033 followed by RAD140 and ostarine. Two or more SARMs were found in >50% of the SARM-positive samples. AASs were identified in 40% of samples containing SARMs. A difference between genders was observed where 34% male and 7% female samples contained AAS. Many samples displayed testosterone/epitestosterone values indicative of testosterone intake, without presence of other AAS, and hence, there is a risk that these samples are being falsely reported as negative. Our results indicate that SARM use might be a concern outside of sport. Subsequently, in addition to AAS, the healthcare system should also be informed about SARM abuse and the associated adverse side effects.
Collapse
Affiliation(s)
- Kim Petterson Bohlin
- Department of Laboratory Medicine, Karolinska Institute, Stockholm, Sweden
- Doping Control Laboratory, Clinical Pharmacology, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Anton Pohanka
- Department of Laboratory Medicine, Karolinska Institute, Stockholm, Sweden
- Doping Control Laboratory, Clinical Pharmacology, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Alexander Andersson
- Department of Laboratory Medicine, Karolinska Institute, Stockholm, Sweden
- Doping Control Laboratory, Clinical Pharmacology, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Tomas Villén
- Drugs of Abuse Laboratory, Clinical Pharmacology, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Lena Ekström
- Department of Laboratory Medicine, Karolinska Institute, Stockholm, Sweden
- Doping Control Laboratory, Clinical Pharmacology, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| |
Collapse
|
2
|
Bergqvist J, Bove M, Andersson A, Schiöler L, Hellgren J. Dose-dependent relationship between nocturnal gastroesophageal reflux and chronic rhinosinusitis in a middle-aged population: results from the SCAPIS pilot. Rhinology 2023; 61:118-123. [PMID: 36715436 DOI: 10.4193/rhin22.297] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Gastroesophageal reflux (GER) has been associated with several upper- and lower-airway diseases. It would be plausible if nightly occurring reflux via laryngopharyngeal reflux (LPR) might affect the upper airways. Still, the role of nocturnal gastroesophageal reflux (nGER) in chronic rhinosinusitis (CRS) is not fully established. The aim of this population-based study was to investigate the association between nGER and CRS. METHODOLOGY This cross-sectional population-based study comprises 1,111 randomly selected subjects from Gothenburg, Sweden, aged 50-64 years. The study is based on self-reported validated questionnaires. CRS was defined according to EPOS criteria. nGER was reported in relation to frequency. RESULTS CRS was more common among subjects with nGER than in those without (13 vs. 4.8%). There was a dose-response association between the frequency of nGER episodes and the risk of having CRS. In the logistic regression adjusted for (age, sex, BMI, educational level, smoking, and asthma). CRS was associated with nGER, OR 1.43 and the odds ratio increased if episodes were reported "almost every night", OR 4.6. CONCLUSIONS The study shows an association between nocturnal GER and CRS in a middle-aged population. The revealed dose dependency supports, though does not prove causality.
Collapse
Affiliation(s)
- J Bergqvist
- Department of Otorhinolaryngology, Head and Neck Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden.,Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - M Bove
- Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Otorhinolaryngology, NU Hospital Group, Trollhättan, Sweden
| | - A Andersson
- COPD Center, Department of Respiratory Medicine and Allergology, Sahlgrenska University Hospital, Gothenburg, Sweden.,COPD Center, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - L Schiöler
- Occupational and Environmental Medicine, Institute of Medicine, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - J Hellgren
- Department of Otorhinolaryngology, Head and Neck Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden.,Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| |
Collapse
|
3
|
Andersson A, Piper T, Ekström L, Hirschberg AL, Thevis M. Usefulness of serum androgen isotope ratio mass spectrometry (IRMS) to detect testosterone supplementation in women. Drug Test Anal 2022; 15:465-469. [PMID: 36564145 DOI: 10.1002/dta.3428] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 12/25/2022]
Abstract
The detection of testosterone intake is facilitated by monitoring the urinary steroid profile in the athlete biological passport. This technique can be used with confidence to identify target samples for isotope ratio mass spectrometry. Regrettably, most research has been performed on male subjects resulting in a method that does not account for females' steroid concentration and/or variation. This study evaluates the usefulness of the carbon isotope ratio (CIR) in serum of female subjects. Two steroid sulphates are targeted in serum, androsterone and epiandrosterone. Both exhibit statistically significant depletion of their CIR after 10 weeks of daily (10 mg) transdermal testosterone administration. Of the 21 female subjects, samples from six individuals were identified as adverse analytical findings; additionally, four were found atypical considering the serum CIR. The urinary athlete biological passport was not sufficiently sensitive to identify target serum samples for isotope ratio mass spectroscopy. Of the six with a suspicious passport, only two could be confirmed using the serum CIR of androsterone and epiandrosterone. This study shows that CIR analysis in serum cannot be considered the sole confirmatory solution to detect testosterone doping in women due to low sensitivity. However, this analysis has the potential to be used as a complementary method in certain situations to confirm exogenous testosterone in women.
Collapse
Affiliation(s)
- Alexander Andersson
- Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden.,Medical Unit of Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
| | - Thomas Piper
- Institute of Biochemistry/Center for Preventive Doping Research, German Sport University Cologne, Cologne, Germany
| | - Lena Ekström
- Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden.,Medical Unit of Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
| | - Angelica Lindén Hirschberg
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Medical Unit of Gynecology and Reproductive Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Mario Thevis
- Institute of Biochemistry/Center for Preventive Doping Research, German Sport University Cologne, Cologne, Germany
| |
Collapse
|
4
|
Erickson A, Berglund E, He M, Marklund M, Mirzazadeh R, Schultz N, Bergenstråhle L, Kvastad L, Andersson A, Bergenstråhle J, Larsson L, Rajakumar T, Thrane K, Ji A, Tarish F, Tanoglidi A, Maaskola J, Colling R, Mirtti T, Hamdy F, Woodcock D, Helleday T, Mills I, Lamb A, Lundenberg J. The spatial landscape of clonal somatic mutations in benign and malignant prostate epithelia. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00563-2] [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: 11/04/2022]
|
5
|
Eklund E, Andersson A, Ekström L, Hirschberg AL. Urinary Steroid Profile in Elite Female Athletes in Relation to Serum Androgens and in Comparison With Untrained Controls. Front Physiol 2021; 12:702305. [PMID: 34526910 PMCID: PMC8435769 DOI: 10.3389/fphys.2021.702305] [Citation(s) in RCA: 6] [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: 04/29/2021] [Accepted: 08/09/2021] [Indexed: 11/15/2022] Open
Abstract
Introduction In female athletes, the interpretation of doping tests is complex due to hormonal variations during the menstrual cycle and hormonal contraceptive use, both influencing the urinary steroid profile. Exercise is suggested to affect circulating steroid hormone levels, and in women, the urinary steroid profile differs between in competition testing and out of competition testing. No previous study has investigated the relationship between amount of exercise and the urinary steroid profile in female elite athletes. Purpose To compare the urinary steroid profile between female Olympic athletes and age- and BMI-matched untrained controls, and to study the urinary steroid profile in relation to serum hormones and amount of exercise. Methods In this cross-sectional study conducted at the Women’s Health Research Unit, Karolinska University Hospital, Stockholm, 94 female elite athletes and 86 untrained controls were included. Serum estrogens and testosterone and the urinary steroid profile were analyzed by liquid chromatography–tandem mass spectrometry and gas chromatography-tandem mass spectrometry, respectively. Exercise hours/week were evaluated by questionnaire. Results Although serum steroid hormones were comparable between groups, the athletes demonstrated approximately 30% lower urinary steroid metabolites of testosterone, epitestosterone, androsterone, etiocholanolone, 5α-androstan-3α, 17β-diol, and 5β-androstan-3α, 17β-diol compared to the controls. The urinary steroid metabolites correlated positively with serum steroid hormones. In the athletes, urinary steroid metabolites: androsterone (rs = −0.28, p = 0.007), epitestosterone (rs = −0.22, p = 0.034), 5αAdiol (rs = −0.31, p = 0.002) and testosterone (rs = −0.24, p = 0.026), were negatively correlated with amount of training (hours per week). Conclusion The urinary concentrations of steroid metabolites were lower in elite athletes than in sedentary controls, although serum steroids were comparable between groups. Moreover, exercise time was negatively associated with the urinary concentrations. Our findings suggest alternative excretion routes of androgens in the athletes related to training.
Collapse
Affiliation(s)
- Emma Eklund
- Department of Women's and Children's Health, Division of Neonatology, Obstetrics and Gynecology, Karolinska Institutet, Stockholm, Sweden
| | - Alexander Andersson
- Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Lena Ekström
- Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Angelica Lindén Hirschberg
- Department of Women's and Children's Health, Division of Neonatology, Obstetrics and Gynecology, Karolinska Institutet, Stockholm, Sweden.,Department of Gynecology and Reproductive Medicine, Karolinska University Hospital, Stockholm, Sweden
| |
Collapse
|
6
|
Elings Knutsson J, Andersson A, Baekken LV, Pohanka A, Ekström L, Hirschberg AL. Disposition of Urinary and Serum Steroid Metabolites in Response to Testosterone Administration in Healthy Women. J Clin Endocrinol Metab 2021; 106:697-707. [PMID: 33274381 DOI: 10.1210/clinem/dgaa904] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Indexed: 02/05/2023]
Abstract
CONTEXT Little is known about how exogenous testosterone (T) affects the steroid profile in women. More knowledge would give the antidoping community keys as to how to interpret tests and detect doping. OBJECTIVE This work aimed to investigate the steroid profile in serum and urine in young healthy women after T administration. METHODS In a randomized, double-blind, placebo-controlled study, 48 healthy young women were assigned to daily treatment with T cream (10 mg) or placebo (1:1) for 10 weeks. Urine and blood were collected before and at the end of treatment. Serum steroids were analyzed with liquid chromatography-tandem mass spectrometry, and urine levels of T, epitestosterone (E), and metabolites included in the Athlete Biological Passport (ABP) were analyzed with gas chromatography-tandem mass spectrometry. RESULTS In serum, T and dihydrotestosterone levels increased, whereas sex hormone-binding globulin and 17-hydroxyprogesterone decreased after T treatment as compared to placebo. In urine, T and 5α-androstanediol increased in the T group. The median T increase in serum was 5.0-fold (range, 1.2-18.2) and correlated to a 2.2-fold (range, 0.4-14.4) median increase in T/E in urine (rs = 0.76). Only 2 of the 24 women receiving T reached the T/E cutoff ratio of 4, whereas when the results were added to the ABP, 6 of 15 participants showed atypically high T/E (40%). In comparison, 22/24 women in the T group increased serum T more than 99.9% of the upper confidence interval of nontreated values. CONCLUSION It seems that the T/E ratio is not sufficient to detect exogenous T in women. Serum total T concentrations could serve as a complementary marker of doping.
Collapse
Affiliation(s)
- Jona Elings Knutsson
- Department of Gynecology and Reproductive Medicine, Karolinska University Hospital, Stockholm, Sweden
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - Alexander Andersson
- Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Pharmacology, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Lasse Vestli Baekken
- Nordic Athlete Passport Management Unit, Anti-Doping Norway, Sognsveien, Oslo, Norway
| | - Anton Pohanka
- Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Pharmacology, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Lena Ekström
- Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Pharmacology, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Angelica Lindén Hirschberg
- Department of Gynecology and Reproductive Medicine, Karolinska University Hospital, Stockholm, Sweden
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| |
Collapse
|
7
|
Widing E, Beck O, Andersson A, Bragd J, Hansson T. [Increased availability needed for analysis of anabolic androgenic steroids outside of sports - proposal of a uniform clinical analysis method in Sweden]. Lakartidningen 2021; 118:20047. [PMID: 33502750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The abuse of anabolic androgenic steroids (AAS) outside of sports is a far greater societal problem than the abuse in sports. Therefore, there is an increasing need for a suitable clinical method for analysis of AAS in urine samples, but only three clinical laboratories in Sweden currently perform analyses of AAS outside of sports. There is a need for harmonization regarding which substances to be analyzed, which analytes to measure and which concentration thresholds (»cut-offs«) to us. Based on data from the three analyzing clinical laboratories, and data from the Swedish Customs Service and National Forensic Centre, a list of suggested substances, analytes and thresholds is presented. The proposed list allows detection of at least 95% of the positive samples outside of sports.
Collapse
Affiliation(s)
- Elin Widing
- kemist, Klinisk kemi, Unilabs, Eskilstuna; för Equalis expertgrupp för läkemedel och toxikologi
| | | | | | | | | |
Collapse
|
8
|
Liljeberg E, Nydahl M, Lövestam E, Andersson A. A qualitative exploration of dietitians’ experiences of prescribing oral nutritional supplements to patients with malnutrition. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.849] [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: 11/25/2022]
|
9
|
Hatschek T, Andersson A, Bjöhle J, Bosch A, Carlsson L, Dreifaldt A, Einbeigi Z, Elinder E, Fredholm H, Isaksson-Friman E, Hellström M, Johansson H, Lekberg T, Lindman H, Zerdes I, Foukakis T, Hartman J, Brandberg Y, Bergh J. 97O PREDIX HER2 trial: Event-free survival and pathologic complete response in clinical subgroups and stromal TILs levels. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.03.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
|
10
|
Börjesson A, Lehtihet M, Andersson A, Dahl M, Vicente V, Ericsson M, Ekström L. Studies of athlete biological passport biomarkers and clinical parameters in male and female users of anabolic androgenic steroids and other doping agents. Drug Test Anal 2020; 12:514-523. [DOI: 10.1002/dta.2763] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 11/30/2019] [Accepted: 01/07/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Annica Börjesson
- Division of Clinical Pharmacology, Department of Laboratory MedicineKarolinska Institutet Stockholm Sweden
- Clinical Pharmacology, Karolinska University LaboratoryKarolinska University Hospital Stockholm Sweden
| | - Mikael Lehtihet
- Department of MedicineKarolinska Institutet and St Görans Hospital Stockholm Sweden
| | - Alexander Andersson
- Anti‐Doping Laboratory, Clinical Pharmacology, Karolinska University LaboratoryKarolinska University Hospital Stockholm Sweden
- Clinical Pharmacology, Karolinska University LaboratoryKarolinska University Hospital Stockholm Sweden
| | - Marja‐Liisa Dahl
- Division of Clinical Pharmacology, Department of Laboratory MedicineKarolinska Institutet Stockholm Sweden
- Clinical Pharmacology, Karolinska University LaboratoryKarolinska University Hospital Stockholm Sweden
| | - Veronica Vicente
- Ambulance Medical Service in Stockholm [Ambulanssjukvården i Storstockholm AB]Academic EMS Stockholm Sweden
- Department of Clinical Science and Education, Karolinska Institutet, StockholmSödersjukhuset Stockholm Sweden
| | - Magnus Ericsson
- Division of Clinical Pharmacology, Department of Laboratory MedicineKarolinska Institutet Stockholm Sweden
- Anti‐Doping Laboratory, Clinical Pharmacology, Karolinska University LaboratoryKarolinska University Hospital Stockholm Sweden
- Clinical Pharmacology, Karolinska University LaboratoryKarolinska University Hospital Stockholm Sweden
| | - Lena Ekström
- Division of Clinical Pharmacology, Department of Laboratory MedicineKarolinska Institutet Stockholm Sweden
| |
Collapse
|
11
|
Ejsmond MJ, Blackburn N, Fridolfsson E, Haecky P, Andersson A, Casini M, Belgrano A, Hylander S. Modeling vitamin B 1 transfer to consumers in the aquatic food web. Sci Rep 2019; 9:10045. [PMID: 31296876 PMCID: PMC6624374 DOI: 10.1038/s41598-019-46422-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 06/26/2019] [Indexed: 11/10/2022] Open
Abstract
Vitamin B1 is an essential exogenous micronutrient for animals. Mass death and reproductive failure in top aquatic consumers caused by vitamin B1 deficiency is an emerging conservation issue in Northern hemisphere aquatic ecosystems. We present for the first time a model that identifies conditions responsible for the constrained flow of vitamin B1 from unicellular organisms to planktivorous fishes. The flow of vitamin B1 through the food web is constrained under anthropogenic pressures of increased nutrient input and, driven by climatic change, increased light attenuation by dissolved substances transported to marine coastal systems. Fishing pressure on piscivorous fish, through increased abundance of planktivorous fish that overexploit mesozooplankton, may further constrain vitamin B1 flow from producers to consumers. We also found that key ecological contributors to the constrained flow of vitamin B1 are a low mesozooplankton biomass, picoalgae prevailing among primary producers and low fluctuations of population numbers of planktonic organisms.
Collapse
Affiliation(s)
- M J Ejsmond
- Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, 30-387, Kraków, Poland.
- Centre for Ecology and Evolution in Microbial Model Systems - EEMiS, Linnaeus University, 39182, Kalmar, Sweden.
| | - N Blackburn
- BIORAS, Hejreskovvej 18B, Copenhagen, Denmark
| | - E Fridolfsson
- Centre for Ecology and Evolution in Microbial Model Systems - EEMiS, Linnaeus University, 39182, Kalmar, Sweden
| | - P Haecky
- BIORAS, Hejreskovvej 18B, Copenhagen, Denmark
| | - A Andersson
- Department of Ecology and Environmental Science, Umeå University, SE-901 87, Umeå, Sweden
- Umeå Marine Sciences Centre, SE-905 71, Hörnefors, Sweden
| | - M Casini
- Department of Aquatic Resources, Institute of Marine Research, Swedish University of Agricultural Sciences, Turistgatan 5, 45330, Lysekil, Sweden
| | - A Belgrano
- Department of Aquatic Resources, Institute of Marine Research, Swedish University of Agricultural Sciences, Turistgatan 5, 45330, Lysekil, Sweden
- Swedish Institute for the Marine Environment (SIME), University of Gothenburg, Box 260, SE-405 30, Gothenburg, Sweden
| | - S Hylander
- Centre for Ecology and Evolution in Microbial Model Systems - EEMiS, Linnaeus University, 39182, Kalmar, Sweden
| |
Collapse
|
12
|
Winiger P, Barrett TE, Sheesley RJ, Huang L, Sharma S, Barrie LA, Yttri KE, Evangeliou N, Eckhardt S, Stohl A, Klimont Z, Heyes C, Semiletov IP, Dudarev OV, Charkin A, Shakhova N, Holmstrand H, Andersson A, Gustafsson Ö. Source apportionment of circum-Arctic atmospheric black carbon from isotopes and modeling. Sci Adv 2019; 5:eaau8052. [PMID: 30788434 PMCID: PMC6374108 DOI: 10.1126/sciadv.aau8052] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 01/04/2019] [Indexed: 05/30/2023]
Abstract
Black carbon (BC) contributes to Arctic climate warming, yet source attributions are inaccurate due to lacking observational constraints and uncertainties in emission inventories. Year-round, isotope-constrained observations reveal strong seasonal variations in BC sources with a consistent and synchronous pattern at all Arctic sites. These sources were dominated by emissions from fossil fuel combustion in the winter and by biomass burning in the summer. The annual mean source of BC to the circum-Arctic was 39 ± 10% from biomass burning. Comparison of transport-model predictions with the observations showed good agreement for BC concentrations, with larger discrepancies for (fossil/biomass burning) sources. The accuracy of simulated BC concentration, but not of origin, points to misallocations of emissions in the emission inventories. The consistency in seasonal source contributions of BC throughout the Arctic provides strong justification for targeted emission reductions to limit the impact of BC on climate warming in the Arctic and beyond.
Collapse
Affiliation(s)
- P. Winiger
- ACES—Department of Applied Environmental Science and the Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden
| | - T. E. Barrett
- The Institute of Ecological, Earth, and Environmental Sciences, Baylor University, Waco, TX, USA
| | - R. J. Sheesley
- Department of Environmental Science, Baylor University, Waco, TX, USA
| | - L. Huang
- Climate Research Division, Atmospheric Science and Technology Directorate, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada
| | - S. Sharma
- Climate Research Division, Atmospheric Science and Technology Directorate, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada
| | - L. A. Barrie
- Department of Geosciences and the Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden
| | - K. E. Yttri
- NILU—Norwegian Institute for Air Research, Instituttveien 18, 2027 Kjeller, Norway
| | - N. Evangeliou
- NILU—Norwegian Institute for Air Research, Instituttveien 18, 2027 Kjeller, Norway
| | - S. Eckhardt
- NILU—Norwegian Institute for Air Research, Instituttveien 18, 2027 Kjeller, Norway
| | - A. Stohl
- NILU—Norwegian Institute for Air Research, Instituttveien 18, 2027 Kjeller, Norway
| | - Z. Klimont
- IIASA—International Institute for Applied Systems Analysis, Schlossplatz 1, 2361 Laxenburg, Austria
| | - C. Heyes
- IIASA—International Institute for Applied Systems Analysis, Schlossplatz 1, 2361 Laxenburg, Austria
| | - I. P. Semiletov
- Pacific Oceanological Institute, Russian Academy of Sciences, 43 Baltiyskaya Street, 690041 Vladivostok, Russia
- International Arctic Research Center, University of Alaska Fairbanks, 930 Koyukuk Drive, Fairbanks, AK, USA
- Tomsk National Research Polytechnic University, 43 A Lenina Ave., 634034 Tomsk, Russia
| | - O. V. Dudarev
- Pacific Oceanological Institute, Russian Academy of Sciences, 43 Baltiyskaya Street, 690041 Vladivostok, Russia
- Tomsk National Research Polytechnic University, 43 A Lenina Ave., 634034 Tomsk, Russia
| | - A. Charkin
- Pacific Oceanological Institute, Russian Academy of Sciences, 43 Baltiyskaya Street, 690041 Vladivostok, Russia
- Tomsk National Research Polytechnic University, 43 A Lenina Ave., 634034 Tomsk, Russia
| | - N. Shakhova
- International Arctic Research Center, University of Alaska Fairbanks, 930 Koyukuk Drive, Fairbanks, AK, USA
- Tomsk National Research Polytechnic University, 43 A Lenina Ave., 634034 Tomsk, Russia
| | - H. Holmstrand
- ACES—Department of Applied Environmental Science and the Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden
| | - A. Andersson
- ACES—Department of Applied Environmental Science and the Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden
| | - Ö. Gustafsson
- ACES—Department of Applied Environmental Science and the Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius Väg 8, 10691 Stockholm, Sweden
| |
Collapse
|
13
|
Gustafsson KL, Nilsson KH, Farman HH, Andersson A, Lionikaite V, Henning P, Wu J, Windahl SH, Islander U, Movérare-Skrtic S, Sjögren K, Carlsten H, Gustafsson JÅ, Ohlsson C, Lagerquist MK. ERα expression in T lymphocytes is dispensable for estrogenic effects in bone. J Endocrinol 2018; 238:129-136. [PMID: 29848607 PMCID: PMC6026922 DOI: 10.1530/joe-18-0183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 05/30/2018] [Indexed: 12/14/2022]
Abstract
Estrogen treatment has positive effects on the skeleton, and we have shown that estrogen receptor alpha (ERα) expression in cells of hematopoietic origin contributes to a normal estrogen treatment response in bone tissue. T lymphocytes are implicated in the estrogenic regulation of bone mass, but it is not known whether T lymphocytes are direct estrogen target cells. Therefore, the aim of this study was to determine the importance of ERα expression in T lymphocytes for the estrogenic regulation of the skeleton using female mice lacking ERα expression specifically in T lymphocytes (Lck-ERα-/-) and ERαflox/flox littermate (control) mice. Deletion of ERα expression in T lymphocytes did not affect bone mineral density (BMD) in sham-operated Lck-ERα-/- compared to control mice, and ovariectomy (ovx) resulted in a similar decrease in BMD in control and Lck-ERα-/- mice compared to sham-operated mice. Furthermore, estrogen treatment of ovx Lck-ERα-/- led to an increased BMD that was indistinguishable from the increase seen after estrogen treatment of ovx control mice. Detailed analysis of both the appendicular (femur) and axial (vertebrae) skeleton showed that both trabecular and cortical bone parameters responded to a similar extent regardless of the presence of ERα in T lymphocytes. In conclusion, ERα expression in T lymphocytes is dispensable for normal estrogenic regulation of bone mass in female mice.
Collapse
Affiliation(s)
- K L Gustafsson
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - K H Nilsson
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - H H Farman
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - A Andersson
- Center for Bone and Arthritis ResearchDepartment of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - V Lionikaite
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - P Henning
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - J Wu
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - S H Windahl
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - U Islander
- Center for Bone and Arthritis ResearchDepartment of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - S Movérare-Skrtic
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - K Sjögren
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - H Carlsten
- Center for Bone and Arthritis ResearchDepartment of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - J-Å Gustafsson
- Center for Nuclear Receptors and Cell SignalingDepartment of Biology and Biochemistry, University of Houston, Houston, Texas, USA
| | - C Ohlsson
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - M K Lagerquist
- Center for Bone and Arthritis ResearchDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| |
Collapse
|
14
|
Mullen J, Gadot Y, Eklund E, Andersson A, J Schulze J, Ericsson M, Lindén Hirschberg A, Rane A, Ekström L. Pregnancy greatly affects the steroidal module of the Athlete Biological Passport. Drug Test Anal 2018; 10:1070-1075. [PMID: 29349906 DOI: 10.1002/dta.2361] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 01/06/2018] [Accepted: 01/10/2018] [Indexed: 02/28/2024]
Abstract
Concentrations of urinary steroids are measured in anti-doping test programs to detect doping with endogenous steroids. These concentrations are combined into ratios and followed over time in the steroidal module of the Athlete Biological Passport (ABP). The most important ratio in the ABP is the testosterone/epitestosterone (T/E) ratio but this ratio is subject to intra-individual variations, especially large in women, which complicates interpretation. In addition, there are other factors affecting T/E. Pregnancy, for example, is known to affect the urinary excretion rate of epitestosterone and hence the T/E ratio. However, the extent of this variation and how pregnancy affect other ratios has not been fully evaluated. Here we have studied the urinary steroid profile, including 19-norandrosterone (19-NA), in 67 pregnant women and compared to postpartum. Epitestosterone was higher and, consequently, the T/E and 5αAdiol/E ratios were lower in the pregnant women. Androsterone/etiocholanolone (A/Etio) and 5αAdiol/5βAdiol, on the other hand, were higher in the first trimester as compared to postpartum (p<0.0001 and p=0.0396, respectively). There was no difference in A/T during pregnancy or after. 19-NA was present in 90.5% of the urine samples collected from pregnant women. In this study, we have shown that the steroid profile of the ABP is affected by pregnancy, and hence can cause atypical passport findings. These atypical findings would lead to unnecessary confirmation procedures, if the patterns of pregnancy are not recognized by the ABP management units.
Collapse
Affiliation(s)
- Jenny Mullen
- Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Yifat Gadot
- St Michaels Hospital and Clinical Pharmacology and Toxicology Unit, Hospital for Sick Children, Toronto, Canada
| | - Emma Eklund
- Department of Women's and Children's Health, Karolinska Institutet, and Department of Gynecology and Reproductive Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Alexander Andersson
- Doping Control Laboratory, Division of Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
| | - Jenny J Schulze
- Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Magnus Ericsson
- Doping Control Laboratory, Division of Clinical Pharmacology, Karolinska University Hospital, Stockholm, Sweden
| | - Angelica Lindén Hirschberg
- Department of Women's and Children's Health, Karolinska Institutet, and Department of Gynecology and Reproductive Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Anders Rane
- Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Lena Ekström
- Department of Laboratory Medicine, Division of Clinical Pharmacology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| |
Collapse
|
15
|
Stam H, Borg K, Andersson A. A time for change! J Rehabil Med 2018. [DOI: 10.2340/16501977-2319] [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: 11/16/2022] Open
|
16
|
Schmidtchen A, Andersson A. Change of Editors and other News from ActaDV. Acta Derm Venereol 2018. [DOI: 10.2340/00015555-2860] [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: 11/16/2022] Open
|
17
|
Lehtihet M, Andersson A, Börjesson A, Schulze J, Rane A, Ericsson M, Ekström L. Codeine influences the serum and urinary profile of endogenous androgens but does not interact with the excretion rate of administered testosterone. Drug Test Anal 2017; 10:723-730. [DOI: 10.1002/dta.2301] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 08/23/2017] [Accepted: 09/07/2017] [Indexed: 11/08/2022]
Affiliation(s)
- M. Lehtihet
- Department of Medicine and Molecular Medicine and Surgery; Karolinska Institutet at Karolinska University Hospital; Stockholm Sweden
| | - A. Andersson
- Department of Clinical Pharmacology; Karolinska University Hospital; Stockholm Sweden
| | - A. Börjesson
- Department of Clinical Pharmacology; Karolinska University Hospital; Stockholm Sweden
- Department of Laboratory Medicine; Karolinska Institutet at, Karolinska University Hospital; Stockholm Sweden
| | - J. Schulze
- Department of Laboratory Medicine; Karolinska Institutet at, Karolinska University Hospital; Stockholm Sweden
| | - A. Rane
- Department of Laboratory Medicine; Karolinska Institutet at, Karolinska University Hospital; Stockholm Sweden
| | - M. Ericsson
- Department of Clinical Pharmacology; Karolinska University Hospital; Stockholm Sweden
- Department of Laboratory Medicine; Karolinska Institutet at, Karolinska University Hospital; Stockholm Sweden
| | - L. Ekström
- Department of Laboratory Medicine; Karolinska Institutet at, Karolinska University Hospital; Stockholm Sweden
| |
Collapse
|
18
|
Peña-Martínez P, Eriksson M, Ramakrishnan R, Chapellier M, Högberg C, Orsmark-Pietras C, Richter J, Andersson A, Fioretos T, Järås M. Interleukin 4 induces apoptosis of acute myeloid leukemia cells in a Stat6-dependent manner. Leukemia 2017; 32:588-596. [PMID: 28819278 PMCID: PMC5843897 DOI: 10.1038/leu.2017.261] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 06/20/2017] [Accepted: 08/07/2017] [Indexed: 12/16/2022]
Abstract
Cytokines provide signals that regulate immature normal and acute myeloid leukemia (AML) cells in the bone marrow microenvironment. We here identify interleukin 4 (IL4) as a selective inhibitor of AML cell growth and survival in a cytokine screen using fluorescently labeled AML cells. RNA-sequencing of the AML cells revealed an IL4-induced upregulation of Stat6 target genes and enrichment of apoptosis-related gene expression signatures. Consistent with these findings, we found that IL4 stimulation of AML cells induced Stat6 phosphorylation and that disruption of Stat6 using CRISPR/Cas9-genetic engineering rendered cells partially resistant to IL4-induced apoptosis. To evaluate whether IL4 inhibits AML cells in vivo, we expressed IL4 ectopically in AML cells transplanted into mice and also injected IL4 into leukemic mice; both strategies resulted in the suppression of the leukemia cell burden and increased survival. Notably, IL4 exposure caused reduced growth and survival of primary AML CD34+CD38- patient cells from several genetic subtypes of AML, whereas normal stem and progenitor cells were less affected. The IL4-induced apoptosis of AML cells was linked to Caspase-3 activation. Our results demonstrate that IL4 selectively induces apoptosis of AML cells in a Stat6-dependent manner-findings that may translate into new therapeutic opportunities in AML.
Collapse
Affiliation(s)
- P Peña-Martínez
- Department of Clinical Genetics, Lund University, Lund, Sweden
| | - M Eriksson
- Department of Clinical Genetics, Lund University, Lund, Sweden
| | - R Ramakrishnan
- Department of Clinical Genetics, Lund University, Lund, Sweden
| | - M Chapellier
- Department of Clinical Genetics, Lund University, Lund, Sweden
| | - C Högberg
- Department of Clinical Genetics, Lund University, Lund, Sweden
| | | | - J Richter
- Department of Molecular Medicine and Gene Therapy, Lund University, Lund, Sweden.,Department of Hematology, Oncology and Radiation Physics, Skåne University Hospital, Lund, Sweden
| | - A Andersson
- Department of Clinical Genetics, Lund University, Lund, Sweden
| | - T Fioretos
- Department of Clinical Genetics, Lund University, Lund, Sweden
| | - M Järås
- Department of Clinical Genetics, Lund University, Lund, Sweden
| |
Collapse
|
19
|
Van Deurs M, Andersson A, Vinterstare J, Didenko A, Persson A, Brönmark C, Nilsson PA. Using accelerometry to quantify prey attack and handling behaviours in piscivorous pike Esox lucius. J Fish Biol 2017; 90:2462-2469. [PMID: 28393360 DOI: 10.1111/jfb.13310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 03/06/2017] [Indexed: 06/07/2023]
Abstract
Accelerometer technology was used to evaluate behaviours in the teleost ambush predator pike Esox lucius foraging on crucian carp Carassius carassius. Automated rule-based estimates of prey-size determined handling time were obtained and are compared with video-recorded behaviours. Solutions to tag attachment and the limitations imposed by battery-time and data-logging capacities are evaluated.
Collapse
Affiliation(s)
- M Van Deurs
- Department of Biology, Ecology Building, Lund University, SE-223 62, Lund, Sweden
- National Institute for Aquatic Resources, Section for Marine Living Resources, Technical University of Denmark, Jaegersborgs Alle 1, DK-2920, Charlottenlund, Denmark
| | - A Andersson
- Department of Biology, Ecology Building, Lund University, SE-223 62, Lund, Sweden
| | - J Vinterstare
- Department of Biology, Ecology Building, Lund University, SE-223 62, Lund, Sweden
| | - A Didenko
- Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Obukhivka St. 135, 03164, Kiev, Ukraine
| | - A Persson
- Department of Biology, Ecology Building, Lund University, SE-223 62, Lund, Sweden
| | - C Brönmark
- Department of Biology, Ecology Building, Lund University, SE-223 62, Lund, Sweden
| | - P A Nilsson
- Department of Biology, Ecology Building, Lund University, SE-223 62, Lund, Sweden
- Department of Environmental and Life Sciences-Biology, Karlstad University, SE-651 88, Karlstad, Sweden
| |
Collapse
|
20
|
Spak F, Andersson A. Large Scale Implementation of Early Identification and Brief Intervention in Swedish Primary Health Care – will it be Successful? Nordic Studies on Alcohol and Drugs 2017. [DOI: 10.1177/145507250802500613] [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: 11/15/2022] Open
|
21
|
|
22
|
Paczkowska J, Rowe OF, Schlüter L, Legrand C, Karlson B, Andersson A. Allochthonous matter: an important factor shaping the phytoplankton community in the Baltic Sea. J Plankton Res 2017; 39:23-34. [PMID: 28566797 PMCID: PMC5444108 DOI: 10.1093/plankt/fbw081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 10/21/2016] [Accepted: 10/31/2016] [Indexed: 06/07/2023]
Abstract
It is well-known that nutrients shape phytoplankton communities in marine systems, but in coastal waters allochthonous dissolved organic matter (ADOM) may also be of central importance. We studied how humic substances (proxy of ADOM) and other variables influenced the nutritional strategies, size structure and pigment content of the phytoplankton community along a south-north gradient in the Baltic Sea. During the summer, the proportion of mixotrophs increased gradually from the phosphorus-rich south to the ADOM-rich north, probably due to ADOM-fueled microbes. The opposite trend was observed for autotrophs. The chlorophyll a (Chl a): carbon (C) ratio increased while the levels of photoprotective pigments decreased from south to north, indicating adaptation to the darker humic-rich water in the north. Picocyanobacteria dominated in phosphorus-rich areas while nanoplankton increased in ADOM-rich areas. During the winter-spring the phytoplankton biomass and concentrations of photoprotective pigments were low, and no trends with respect to autotrophs and mixotrophs were observed. Microplankton was the dominant size group in the entire study area. We conclude that changes in the size structure of the phytoplankton community, the Chl a:C ratio and the concentrations of photoprotective pigments are indicative of changes in ADOM, a factor of particular importance in a changing climate.
Collapse
Affiliation(s)
- J. Paczkowska
- Department of Ecology and Environmental Science, Umeå University, SE-901 87Umeå, Sweden
- Umeå Marine Science Centre, SE-905 71Hörnefors, Sweden
| | - OF Rowe
- Department of Ecology and Environmental Science, Umeå University, SE-901 87Umeå, Sweden
- Umeå Marine Science Centre, SE-905 71Hörnefors, Sweden
- Department of Food and Environmental Sciences, Division of Microbiology and Biotechnology, Viikki Biocenter 1, University of Helsinki, Helsinki, Finland
| | - L. Schlüter
- DHI, Environment and Toxicology, Agern Allé 5, 2970Hørsholmc, Denmark
| | - C. Legrand
- Center of Ecology and Evolution in Microbial Model Systems, EEMiS, Department of Biology and Environmental Sciences, Linnaeus University, SE-391 82Kalmar, Sweden
| | - B. Karlson
- Swedish Meteorological and Hydrological Institute, Oceanography, SE-426 71Västra Frölunda, Sweden
| | - A. Andersson
- Department of Ecology and Environmental Science, Umeå University, SE-901 87Umeå, Sweden
- Umeå Marine Science Centre, SE-905 71Hörnefors, Sweden
| |
Collapse
|
23
|
Winiger P, Andersson A, Eckhardt S, Stohl A, Gustafsson Ö. The sources of atmospheric black carbon at a European gateway to the Arctic. Nat Commun 2016; 7:12776. [PMID: 27627859 PMCID: PMC5027618 DOI: 10.1038/ncomms12776] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 08/01/2016] [Indexed: 11/16/2022] Open
Abstract
Black carbon (BC) aerosols from incomplete combustion of biomass and fossil fuel contribute to Arctic climate warming. Models-seeking to advise mitigation policy-are challenged in reproducing observations of seasonally varying BC concentrations in the Arctic air. Here we compare year-round observations of BC and its δ(13)C/Δ(14)C-diagnosed sources in Arctic Scandinavia, with tailored simulations from an atmospheric transport model. The model predictions for this European gateway to the Arctic are greatly improved when the emission inventory of anthropogenic sources is amended by satellite-derived estimates of BC emissions from fires. Both BC concentrations (R(2)=0.89, P<0.05) and source contributions (R(2)=0.77, P<0.05) are accurately mimicked and linked to predominantly European emissions. This improved model skill allows for more accurate assessment of sources and effects of BC in the Arctic, and a more credible scientific underpinning of policy efforts aimed at efficiently reducing BC emissions reaching the European Arctic.
Collapse
Affiliation(s)
- P Winiger
- Department of Environmental Science and Analytical Chemistry, and the Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius väg 8, Stockholm 10691, Sweden
| | - A Andersson
- Department of Environmental Science and Analytical Chemistry, and the Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius väg 8, Stockholm 10691, Sweden
| | - S Eckhardt
- Department of Atmospheric and Climate Research, Norwegian Institute for Air Research, NILU, Instituttveien 18, Kjeller 2027, Norway
| | - A Stohl
- Department of Atmospheric and Climate Research, Norwegian Institute for Air Research, NILU, Instituttveien 18, Kjeller 2027, Norway
| | - Ö. Gustafsson
- Department of Environmental Science and Analytical Chemistry, and the Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius väg 8, Stockholm 10691, Sweden
| |
Collapse
|
24
|
Arwin H, Mendoza-Galván A, Magnusson R, Andersson A, Landin J, Järrendahl K, Garcia-Caurel E, Ossikovski R. Structural circular birefringence and dichroism quantified by differential decomposition of spectroscopic transmission Mueller matrices from Cetonia aurata. Opt Lett 2016; 41:3293-3296. [PMID: 27420518 DOI: 10.1364/ol.41.003293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Transmission Mueller-matrix spectroscopic ellipsometry is applied to the cuticle of the beetle Cetonia aurata in the spectral range 300-1000 nm. The cuticle is optically reciprocal and exhibits circular Bragg filter features for green light. By using differential decomposition of the Mueller matrix, the circular and linear birefringence as well as dichroism of the beetle cuticle are quantified. A maximum value of structural optical activity of 560°/mm is found.
Collapse
|
25
|
Figueroa D, Rowe OF, Paczkowska J, Legrand C, Andersson A. Allochthonous Carbon--a Major Driver of Bacterioplankton Production in the Subarctic Northern Baltic Sea. Microb Ecol 2016; 71:789-801. [PMID: 26677860 PMCID: PMC4823372 DOI: 10.1007/s00248-015-0714-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 11/30/2015] [Indexed: 05/22/2023]
Abstract
Heterotrophic bacteria are, in many aquatic systems, reliant on autochthonous organic carbon as their energy source. One exception is low-productive humic lakes, where allochthonous dissolved organic matter (ADOM) is the major driver. We hypothesized that bacterial production (BP) is similarly regulated in subarctic estuaries that receive large amounts of riverine material. BP and potential explanatory factors were measured during May-August 2011 in the subarctic Råne Estuary, northern Sweden. The highest BP was observed in spring, concomitant with the spring river-flush and the lowest rates occurred during summer when primary production (PP) peaked. PLS correlations showed that ∼60% of the BP variation was explained by different ADOM components, measured as humic substances, dissolved organic carbon (DOC) and coloured dissolved organic matter (CDOM). On average, BP was threefold higher than PP. The bioavailability of allochthonous dissolved organic carbon (ADOC) exhibited large spatial and temporal variation; however, the average value was low, ∼2%. Bioassay analysis showed that BP in the near-shore area was potentially carbon limited early in the season, while BP at seaward stations was more commonly limited by nitrogen-phosphorus. Nevertheless, the bioassay indicated that ADOC could contribute significantly to the in situ BP, ∼60%. We conclude that ADOM is a regulator of BP in the studied estuary. Thus, projected climate-induced increases in river discharge suggest that BP will increase in subarctic coastal areas during the coming century.
Collapse
Affiliation(s)
- D Figueroa
- Department of Ecology and Environmental Science, Umeå University, SE-901 87, Umeå, Sweden
- Umeå Marine Sciences Centre, SE-905 71, Hörnefors, Sweden
| | - O F Rowe
- Department of Ecology and Environmental Science, Umeå University, SE-901 87, Umeå, Sweden
- Department of Food and Environmental Sciences, Division of Microbiology and Biotechnology, Viikki Biocenter 1, University of Helsinki, Helsinki, Finland
| | - J Paczkowska
- Department of Ecology and Environmental Science, Umeå University, SE-901 87, Umeå, Sweden
| | - C Legrand
- Ecology and Evolution in Microbial Model Systems, EEMiS, Department of Biology and Environmental Sciences, Linnaeus University, SE-391 82, Kalmar, Sweden
| | - A Andersson
- Department of Ecology and Environmental Science, Umeå University, SE-901 87, Umeå, Sweden.
- Umeå Marine Sciences Centre, SE-905 71, Hörnefors, Sweden.
| |
Collapse
|
26
|
Ripszam M, Gallampois CMJ, Berglund Å, Larsson H, Andersson A, Tysklind M, Haglund P. Effects of predicted climatic changes on distribution of organic contaminants in brackish water mesocosms. Sci Total Environ 2015; 517:10-21. [PMID: 25710621 DOI: 10.1016/j.scitotenv.2015.02.051] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 02/10/2015] [Accepted: 02/13/2015] [Indexed: 06/04/2023]
Abstract
Predicted consequences of future climate change in the northern Baltic Sea include increases in sea surface temperatures and terrestrial dissolved organic carbon (DOC) runoff. These changes are expected to alter environmental distribution of anthropogenic organic contaminants (OCs). To assess likely shifts in their distributions, outdoor mesocosms were employed to mimic pelagic ecosystems at two temperatures and two DOC concentrations, current: 15°C and 4 mg DOCL(-1) and, within ranges of predicted increases, 18°C and 6 mg DOCL(-1), respectively. Selected organic contaminants were added to the mesocosms to monitor changes in their distribution induced by the treatments. OC partitioning to particulate matter and sedimentation were enhanced at the higher DOC concentration, at both temperatures, while higher losses and lower partitioning of OCs to DOC were observed at the higher temperature. No combined effects of higher temperature and DOC on partitioning were observed, possibly because of the balancing nature of these processes. Therefore, changes in OCs' fates may largely depend on whether they are most sensitive to temperature or DOC concentration rises. Bromoanilines, phenanthrene, biphenyl and naphthalene were sensitive to the rise in DOC concentration, whereas organophosphates, chlorobenzenes (PCBz) and polychlorinated biphenyls (PCBs) were more sensitive to temperature. Mitotane and diflufenican were sensitive to both temperature and DOC concentration rises individually, but not in combination.
Collapse
Affiliation(s)
- M Ripszam
- Department of Chemistry, Umea University, 901 87 Umeå, Sweden.
| | | | - Å Berglund
- Department of Ecology and Environmental Sciences, Umeå University, 901 87 Umeå, Sweden
| | - H Larsson
- Umeå Marine Sciences Centre, Umeå University, Norrbyn, 905 71 Hörnefors, Sweden
| | - A Andersson
- Department of Ecology and Environmental Sciences, Umeå University, 901 87 Umeå, Sweden
| | - M Tysklind
- Department of Chemistry, Umea University, 901 87 Umeå, Sweden
| | - P Haglund
- Department of Chemistry, Umea University, 901 87 Umeå, Sweden
| |
Collapse
|
27
|
Gaul C, Diener H, Solbach K, Silver N, Straube A, Magis D, Reuter U, Andersson A, Liebler EJ. EHMTI-0363. Quality of life in subjects treated by non-invasive vagus nerve stimulation using gammacore® for the prevention and acute treatment of chronic cluster headache. J Headache Pain 2014. [PMCID: PMC4181890 DOI: 10.1186/1129-2377-15-s1-i6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
28
|
Gaul C, Diener H, Solbach K, Silver N, Straube A, Magis D, Reuter U, Andersson A, Liebler EJ. EHMTI-0364. Non-invasive vagus nerve stimulation using gammacore® for prevention and acute treatment of chronic cluster headache: report from the randomized phase of the preva study. J Headache Pain 2014. [PMCID: PMC4182155 DOI: 10.1186/1129-2377-15-s1-i7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
29
|
Gaul C, Diener H, Solbach K, Silver N, Straube A, Magis D, Reuter U, Andersson A, Liebler EJ. EHMTI-0362. Non-invasive vagus nerve stimulation with gammacore® for prevention and acute treatment of chronic cluster headache: report from the extension phase of the preva study. J Headache Pain 2014. [PMCID: PMC4181769 DOI: 10.1186/1129-2377-15-s1-i8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
|
30
|
Tikk K, Sookthai D, Johnson T, Rinaldi S, Romieu I, Tjønneland A, Olsen A, Overvad K, Clavel-Chapelon F, Baglietto L, Boeing H, Trichopoulou A, Lagiou P, Trichopoulos D, Palli D, Pala V, Tumino R, Rosso S, Panico S, Agudo A, Menéndez V, Sánchez MJ, Amiano P, Huerta Castaño JM, Ardanaz E, Bueno-de-Mesquita HB, Monninkhof E, Onland-Moret C, Andersson A, Sund M, Weiderpass E, Khaw KT, Key TJ, Travis RC, Gunter MJ, Riboli E, Dossus L, Kaaks R. Circulating prolactin and breast cancer risk among pre- and postmenopausal women in the EPIC cohort. Ann Oncol 2014; 25:1422-1428. [PMID: 24718887 DOI: 10.1093/annonc/mdu150] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Experimental and epidemiological evidence suggests that prolactin might play a role in the etiology of breast cancer. We analyzed the relationship of prediagnostic circulating prolactin levels with the risk of breast cancer by menopausal status, use of postmenopausal hormone replacement therapy (HRT) at blood donation, and by estrogen and progesterone receptor status of the breast tumors. PATIENTS AND METHODS Conditional logistic regression was used to analyze the data from a case-control study nested within the prospective European EPIC cohort, including 2250 invasive breast cancer and their matched control subjects. RESULTS Statistically significant heterogeneity in the association of prolactin levels with breast cancer risk between women who were either pre- or postmenopausal at the time of blood donation was observed (Phet = 0.04). Higher serum levels of prolactin were associated with significant increase in the risk of breast cancer among postmenopausal women [odds ratio (OR)Q4-Q1 = 1.29 (95% confidence interval, CI, 1.05-1.58), Ptrend = 0.09]; however, this increase in risk seemed to be confined to women who used postmenopausal HRT at blood donation [ORQ4-Q1 = 1.45 (95% CI 1.08-1.95), Ptrend = 0.01], whereas no statistically significant association was found for the non-users of HRT [ORQ4-Q1 = 1.11 (95%CI 0.83-1.49), Ptrend = 0.80] (Phet = 0.08). Among premenopausal women, a statistically non-significant inverse association was observed [ORQ4-Q1 = 0.70 (95% CI 0.48-1.03), Ptrend = 0.16]. There was no heterogeneity in the prolactin-breast cancer association by hormone receptor status of the tumor. CONCLUSION Our study indicates that higher circulating levels of prolactin among the postmenopausal HRT users at baseline may be associated with increased breast cancer risk.
Collapse
Affiliation(s)
- K Tikk
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ) Heidelberg, Heidelberg, Germany
| | - D Sookthai
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ) Heidelberg, Heidelberg, Germany
| | - T Johnson
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ) Heidelberg, Heidelberg, Germany
| | - S Rinaldi
- Section of Nutrition and Metabolism, International Agency for Research on Cancer (IARC), Lyon, France
| | - I Romieu
- Section of Nutrition and Metabolism, International Agency for Research on Cancer (IARC), Lyon, France
| | - A Tjønneland
- Danish Cancer Society Research Center, Copenhagen
| | - A Olsen
- Danish Cancer Society Research Center, Copenhagen
| | - K Overvad
- Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark
| | - F Clavel-Chapelon
- INSERM, Centre for Research in Epidemiology and Population Health [CESP], Nutrition, Hormones and Women's Health Team, Villejuif; University of Paris Sud, UMRS, Villejuif; IGR, Villejuif, France
| | - L Baglietto
- Cancer Epidemiology Centre, Cancer Council Victoria, Melbourne; Centre for Molecular, Environmental, Genetic, and Analytic Epidemiology, The University of Melbourne, Melbourne, Australia
| | - H Boeing
- Department of Epidemiology, German Institute of Human Nutrition (DIfE) Potsdam-Rehbrücke, Nuthetal, Germany
| | - A Trichopoulou
- Department of Hygiene, Epidemiology and Medical Statistics, University of Athens Medical School, Athens; Hellenic Health Foundation, Athens, Greece
| | - P Lagiou
- Department of Hygiene, Epidemiology and Medical Statistics, University of Athens Medical School, Athens; Department of Epidemiology, Harvard School of Public Health, Boston, USA; Bureau of Epidemiologic Research, Academy of Athens, Athens, Greece
| | - D Trichopoulos
- Hellenic Health Foundation, Athens, Greece; Department of Epidemiology, Harvard School of Public Health, Boston, USA; Bureau of Epidemiologic Research, Academy of Athens, Athens, Greece
| | - D Palli
- Molecular and Nutritional Epidemiology Unit, Cancer Research and Prevention Institute-ISPO, Florence, Italy
| | - V Pala
- Epidemiology and Prevention Unit, National Tumor Institute (IRCCS), Milano
| | - R Tumino
- Cancer Registry and Histopathology Unit, 'Civic-M. P. Arezzo' Hospital ASP, Ragusa
| | - S Rosso
- Piedmont Cancer Registry, Centre for Epidemiology and Prevention in Oncology in Piedmont, Torino
| | - S Panico
- Department of Clinical and Experimental Medicine, Federico II University, Naples, Italy
| | - A Agudo
- Unit of Nutrition, Environment and Cancer, Catalan Institute of Oncology-ICO, IDIBELL, Barcelona
| | | | - M-J Sánchez
- Granada Cancer Registry, Andalusian School of Public Health, Granada; Consortium for Biomedical Research in Epidemiology and Public Health (CIBER), Madrid
| | - P Amiano
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBER), Madrid; Public Health Division of Gipuzkoa, Basque Regional Health Department, San Sebastian
| | - J M Huerta Castaño
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBER), Madrid; Department of Epidemiology, Murcia Regional Health Authority, Murcia
| | - E Ardanaz
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBER), Madrid; Navarre Public Health Institute, Pamplona, Spain
| | - H B Bueno-de-Mesquita
- National Institute for Public Health and the Environment (RIVM), Bilthoven; Department of Gastroenterology and Hepatology, University Medical Centre, Utrecht, The Netherlands; School of Public Health, Imperial College, London, UK
| | - E Monninkhof
- Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center, Utrecht, The Netherlands
| | - C Onland-Moret
- Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center, Utrecht, The Netherlands
| | - A Andersson
- Department of Radiation Sciences, University of Umeå, Umeå
| | - M Sund
- Department of Surgical and Perioperative Sciences, Umeå University, Umeå, Sweden
| | - E Weiderpass
- Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø; Department of Research, Cancer Registry of Norway, Oslo, Norway; Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden; Society of Public Health, Helsinki, Finland
| | - K-T Khaw
- School of Clinical Medicine, University of Cambridge, Cambridge
| | - T J Key
- Cancer Epidemiology Unit, University of Oxford, Oxford, UK
| | - R C Travis
- Cancer Epidemiology Unit, University of Oxford, Oxford, UK
| | - M J Gunter
- School of Public Health, Imperial College, London, UK
| | - E Riboli
- School of Public Health, Imperial College, London, UK
| | - L Dossus
- INSERM, Centre for Research in Epidemiology and Population Health [CESP], Nutrition, Hormones and Women's Health Team, Villejuif; University of Paris Sud, UMRS, Villejuif; IGR, Villejuif, France
| | - R Kaaks
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ) Heidelberg, Heidelberg, Germany.
| |
Collapse
|
31
|
Kolecka A, Khayhan K, Arabatzis M, Velegraki A, Kostrzewa M, Andersson A, Scheynius A, Cafarchia C, Iatta R, Montagna M, Youngchim S, Cabañes F, Hoopman P, Kraak B, Groenewald M, Boekhout T. Efficient identification ofMalasseziayeasts by matrix‐assisted laser desorption ionization‐time of flight mass spectrometry (MALDI‐TOF MS). Br J Dermatol 2014; 170:332-41. [DOI: 10.1111/bjd.12680] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2013] [Indexed: 12/15/2022]
Affiliation(s)
- A. Kolecka
- Department of Yeast and Basidiomycete Research CBS‐KNAW Fungal Biodiversity Centre Uppsalalaan 8 3584CT Utrecht the Netherlands
| | - K. Khayhan
- Department of Yeast and Basidiomycete Research CBS‐KNAW Fungal Biodiversity Centre Uppsalalaan 8 3584CT Utrecht the Netherlands
- Department of Microbiology and Parasitology Faculty of Medical Sciences University of Phayao Phayao Thailand
| | - M. Arabatzis
- Research Mycology Laboratory (K.A. 70/3/6915) Microbiology Department Medical School of University of Athens Athens Greece
| | - A. Velegraki
- Research Mycology Laboratory (K.A. 70/3/6915) Microbiology Department Medical School of University of Athens Athens Greece
| | - M. Kostrzewa
- Bioanalytical Development Bruker Daltonics GmbH Bremen Germany
| | - A. Andersson
- Translational Immunology Unit Department of Medicine Solna Karolinska Institutet Stockholm Sweden
| | - A. Scheynius
- Translational Immunology Unit Department of Medicine Solna Karolinska Institutet Stockholm Sweden
| | - C. Cafarchia
- Department of Veterinary Medicine Aldo Moro University of Bari Bari Italy
| | - R. Iatta
- Department of Veterinary Medicine Aldo Moro University of Bari Bari Italy
| | - M.T. Montagna
- Department of Biomedical Science and Human Oncology Section of Hygiene Aldo Moro University of Bari Bari Italy
| | - S. Youngchim
- Department of Microbiology Faculty of Medicine Chiang Mai University Chiang Mai Thailand
| | - F.J. Cabañes
- Department of Animal Health and Anatomy Universitat Autònoma de Barcelona Bellaterra Barcelona Spain
| | - P. Hoopman
- Department of Yeast and Basidiomycete Research CBS‐KNAW Fungal Biodiversity Centre Uppsalalaan 8 3584CT Utrecht the Netherlands
| | - B. Kraak
- Department of Yeast and Basidiomycete Research CBS‐KNAW Fungal Biodiversity Centre Uppsalalaan 8 3584CT Utrecht the Netherlands
| | - M. Groenewald
- Department of Yeast and Basidiomycete Research CBS‐KNAW Fungal Biodiversity Centre Uppsalalaan 8 3584CT Utrecht the Netherlands
| | - T. Boekhout
- Department of Yeast and Basidiomycete Research CBS‐KNAW Fungal Biodiversity Centre Uppsalalaan 8 3584CT Utrecht the Netherlands
- Department of Internal Medicine and Infectious Diseases University Medical Center Utrecht the Netherlands
- Department of Dermatology Shanghai Key Laboratory of Molecular Medical Mycology Second Military Medical University Changzheng Hospital Institute of Dermatology and Medical Mycology Shanghai China
- Institute of Microbiology Chinese Academy of Sciences Beijing China
| |
Collapse
|
32
|
Thelaus J, Andersson A, Broman T, Bäckman S, Granberg M, Karlsson L, Kuoppa K, Larsson E, Lundmark E, Lundström JO, Mathisen P, Näslund J, Schäfer M, Wahab T, Forsman M. Francisella tularensis subspecies holarctica occurs in Swedish mosquitoes, persists through the developmental stages of laboratory-infected mosquitoes and is transmissible during blood feeding. Microb Ecol 2014; 67:96-107. [PMID: 24057273 PMCID: PMC3907667 DOI: 10.1007/s00248-013-0285-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 08/28/2013] [Indexed: 05/29/2023]
Abstract
In Sweden, mosquitoes are considered the major vectors of the bacterium Francisella tularensis subsp. holarctica, which causes tularaemia. The aim of this study was to investigate whether mosquitoes acquire the bacterium as aquatic larvae and transmit the disease as adults. Mosquitoes sampled in a Swedish area where tularaemia is endemic (Örebro) were positive for the presence of F. tularensis deoxyribonucleic acid throughout the summer. Presence of the clinically relevant F. tularensis subsp. holarctica was confirmed in 11 out of the 14 mosquito species sampled. Experiments performed using laboratory-reared Aedes aegypti confirmed that F. tularensis subsp. holarctica was transstadially maintained from orally infected larvae to adult mosquitoes and that 25% of the adults exposed as larvae were positive for the presence of F. tularensis-specific sequences for at least 2 weeks. In addition, we found that F. tularensis subsp. holarctica was transmitted to 58% of the adult mosquitoes feeding on diseased mice. In a small-scale in vivo transmission experiment with F. tularensis subsp. holarctica-positive adult mosquitoes and susceptible mice, none of the animals developed tularaemia. However, we confirmed that there was transmission of the bacterium to blood vials by mosquitoes that had been exposed to the bacterium in the larval stage. Taken together, these results provide evidence that mosquitoes play a role in disease transmission in part of Sweden where tularaemia recurs.
Collapse
Affiliation(s)
- J Thelaus
- Division of CBRN Defence and Security, Swedish Defence Research Agency, 90182, Umea, Sweden,
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Lefébure R, Degerman R, Andersson A, Larsson S, Eriksson LO, Båmstedt U, Byström P. Impacts of elevated terrestrial nutrient loads and temperature on pelagic food-web efficiency and fish production. Glob Chang Biol 2013; 19:1358-72. [PMID: 23505052 DOI: 10.1111/gcb.12134] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2012] [Revised: 11/26/2012] [Accepted: 12/03/2012] [Indexed: 05/05/2023]
Abstract
Both temperature and terrestrial organic matter have strong impacts on aquatic food-web dynamics and production. Temperature affects vital rates of all organisms, and terrestrial organic matter can act both as an energy source for lower trophic levels, while simultaneously reducing light availability for autotrophic production. As climate change predictions for the Baltic Sea and elsewhere suggest increases in both terrestrial matter runoff and increases in temperature, we studied the effects on pelagic food-web dynamics and food-web efficiency in a plausible future scenario with respect to these abiotic variables in a large-scale mesocosm experiment. Total basal (phytoplankton plus bacterial) production was slightly reduced when only increasing temperatures, but was otherwise similar across all other treatments. Separate increases in nutrient loads and temperature decreased the ratio of autotrophic:heterotrophic production, but the combined treatment of elevated temperature and terrestrial nutrient loads increased both fish production and food-web efficiency. CDOM: Chl a ratios strongly indicated that terrestrial and not autotrophic carbon was the main energy source in these food webs and our results also showed that zooplankton biomass was positively correlated with increased bacterial production. Concomitantly, biomass of the dominant calanoid copepod Acartia sp. increased as an effect of increased temperature. As the combined effects of increased temperature and terrestrial organic nutrient loads were required to increase zooplankton abundance and fish production, conclusions about effects of climate change on food-web dynamics and fish production must be based on realistic combinations of several abiotic factors. Moreover, our results question established notions on the net inefficiency of heterotrophic carbon transfer to the top of the food web.
Collapse
Affiliation(s)
- R Lefébure
- Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden.
| | | | | | | | | | | | | |
Collapse
|
34
|
Abstract
There is a need for analytical methods capable of monitoring blood antibiotic levels in real time. Here we present a method for quantifying antibiotic levels in whole blood that does not require any sample pretreatment. The tests employ the enzyme penicillinase to assay for penicillin G, penicillin V and ampicillin using a flow-injected biosensor, the Enzyme Thermistor. Optimal flow rates, sample volumes and pH were determined to be 0.5 mL/min, 100 μL and 7.0, respectively. Analysis of the antibiotics diluted in buffer gave a linear range of 0.17-5.0 mM. Calibration curves prepared using blood spiked with the antibiotics gave a linear range of 0.17-2.0 mM. Linear regression values for all of the calibration curves were 0.998 or higher. Assay cycle time was 5 min. The relative standard deviation value for 100 determinations of a mock blood sample spiked with penicillin G was 6.71%. Despite the elimination of sample pretreatment, no detectable clogging or signal drift was observed. The assay provides a fast, simple, reliable analytical method for determining antibiotic concentrations in blood without the need for any sample pretreatment. This is an important first step towards developing a device capable of real-time monitoring of antibiotic levels in whole blood. The technology has the potential to significantly improve the outcomes of patients undergoing critical care.
Collapse
Affiliation(s)
- Q Chen
- Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Medical School of Xi'an Jiaotong University, Xi'an, China
| | | | | | | |
Collapse
|
35
|
Vonk JE, Sánchez-García L, van Dongen BE, Alling V, Kosmach D, Charkin A, Semiletov IP, Dudarev OV, Shakhova N, Roos P, Eglinton TI, Andersson A, Gustafsson Ö. Activation of old carbon by erosion of coastal and subsea permafrost in Arctic Siberia. Nature 2012; 489:137-40. [DOI: 10.1038/nature11392] [Citation(s) in RCA: 244] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 07/03/2012] [Indexed: 11/09/2022]
|
36
|
Simunaniemi AM, Nydahl M, Andersson A. Cluster analysis of fruit and vegetable-related perceptions: an alternative approach of consumer segmentation. J Hum Nutr Diet 2012; 26:38-47. [DOI: 10.1111/j.1365-277x.2012.01272.x] [Citation(s) in RCA: 6] [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: 11/29/2022]
|
37
|
Andersson A, Rundgren M, Kalman S, Rooyackers O, Brattstrom O, Oldner A, Eriksson S, Frithiof R. Gut microcirculatory and mitochondrial effects of hyperdynamic endotoxaemic shock and norepinephrine treatment. Br J Anaesth 2012; 108:254-61. [DOI: 10.1093/bja/aer379] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
|
38
|
Vahlquist A, Andersson A. New Section Editors, One-Year Experience of Open Access and Now Also Apps for iPad and iPhone. Acta Derm Venereol 2012. [DOI: 10.2340/00015555-1298] [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: 11/16/2022] Open
|
39
|
Hjorth K, Johansen K, Holen B, Andersson A, Christensen H, Siivinen K, Toome M. Pesticide residues in fruits and vegetables from South America – A Nordic project. Food Control 2011. [DOI: 10.1016/j.foodcont.2010.05.017] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
40
|
Ye Q, Lian F, Chavez PRG, Chung J, Ling W, Seitz HK, Wang XD, French SW, Li X, Li J, Bardag-Gorce F, Oliva J, French BA, Maurel DB, Jaffre C, Fazzalari NL, Uzbekov R, Boisseau N, Rochefort GY, Pallu S, Benhamou C, Naassila M, Warnault V, Legastelois R, Vilpoux C, Botia B, Houchi H, Pierrefiche O, Jeanblanc J, Kervern M, Alaux S, Walther L, Hansson T, Andersson A, Alling C, Isaksson A, Hoiseth G, Nordal K, Morland J. FREE ORAL COMMUNICATIONS 5: ALCOHOL-RELATED LIVER DISEASES: BIOLOGICAL MARKERS * O5.1 * THE CYTOCHROME P450 2E1 INHIBITOR CHLORMETHIAZOLE INHIBITS HEPATIC ETHANOL-MEDIATED CARCINOGENESIS INDUCED BY DIETHYLNITROSAMINE. Alcohol Alcohol 2011. [DOI: 10.1093/alcalc/agr097] [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: 11/14/2022] Open
|
41
|
Lorefält B, Andersson A, Wirehn AB, Wilhelmsson S. Nutritional status and health care costs for the elderly living in municipal residential homes--an intervention study. J Nutr Health Aging 2011; 15:92-7. [PMID: 21365160 DOI: 10.1007/s12603-011-0019-3] [Citation(s) in RCA: 23] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
OBJECTIVE The aim was to study the effect of individualised meals on nutritional status among older people living in municipal residential homes and to compare the results with a control group. An additional aim was to estimate direct health care costs for both groups. SETTING Six different municipal residential homes in the south-east of Sweden. PARTICIPANTS Older people living in three residential homes constituted the intervention group n=42 and the rest constituted the control group n=67. INTERVENTION A multifaceted intervention design was used. Based on an interview with staff a tailored education programme about nutritional care, including both theoretical and practical issues, was carried through to staff in the intervention group. Nutritional status among the elderly was measured by Mini Nutritional Assessment (MNA), individualised meals were offered to the residents based on the results of the MNA. Staff in the control group only received education on how to measure MNA and the residents followed the usual meal routines. MEASUREMENTS Nutritional status was measured by MNA at baseline and after 3 months. Cost data on health care visits during 2007 were collected from the Cost Per Patient database. RESULTS Nutritional status improved and body weight increased after 3 months in the intervention group. Thus, primary health care costs constituted about 80% of the total median cost in the intervention group and about 55% in the control group. CONCLUSION With improved knowledge the staff could offer the elderly more individualised meals. One of their future challenges is to recognise and assess nutritional status among this group. If malnutrition could be prevented health care costs should be reduced.
Collapse
Affiliation(s)
- B Lorefält
- Division of Nursing Science, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | | | | | | |
Collapse
|
42
|
Schmitt-Knosalla I, Brösel S, Andersson A, Yeter R, Dandel M, Volk HD, Hetzer R, Knosalla C. Major histocompatibility complex (MHC) requirements for chronic allograft rejection after orthotopic lung transplantation in mice. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269181] [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: 10/18/2022]
|
43
|
Andersson A, Brösel S, Lange D, Knosalla C, Shultz LD, Egger D, Volk HD, Schmitt-Knosalla I. Human immune system development in NOD/LtSz-scid IL2Rgnull mice after engraftment with purified cord blood derived stem cells. Thorac Cardiovasc Surg 2011. [DOI: 10.1055/s-0030-1269393] [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: 10/18/2022]
|
44
|
Carlfjord S, Andersson A, Nilsen P, Bendtsen P, Lindberg M. The importance of organizational climate and implementation strategy at the introduction of a new working tool in primary health care. J Eval Clin Pract 2010; 16:1326-32. [PMID: 20738475 DOI: 10.1111/j.1365-2753.2009.01336.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
RATIONALE, AIMS AND OBJECTIVES The transmission of research findings into routine care is a slow and unpredictable process. Important factors predicting receptivity for innovations within organizations have been identified, but there is a need for further research in this area. The aim of this study was to describe contextual factors and evaluate if organizational climate and implementation strategy influenced outcome, when a computer-based concept for lifestyle intervention was introduced in primary health care (PHC). METHOD The study was conducted using a prospective intervention design. The computer-based concept was implemented at six PHC units. Contextual factors in terms of size, leadership, organizational climate and political environment at the units included in the study were assessed before implementation. Organizational climate was measured using the Creative Climate Questionnaire (CCQ). Two different implementation strategies were used: one explicit strategy, based on Rogers' theories about the innovation-decision process, and one implicit strategy. After 6 months, implementation outcome in terms of the proportion of patients who had been referred to the test, was measured. RESULTS The CCQ questionnaire response rates among staff ranged from 67% to 91% at the six units. Organizational climate differed substantially between the units. Managers scored higher on CCQ than staff at the same unit. A combination of high CCQ scores and explicit implementation strategy was associated with a positive implementation outcome. CONCLUSIONS Organizational climate varies substantially between different PHC units. High CCQ scores in combination with an explicit implementation strategy predict a positive implementation outcome when a new working tool is introduced in PHC.
Collapse
Affiliation(s)
- S Carlfjord
- Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
| | | | | | | | | |
Collapse
|
45
|
Grasselli R, Lugmair C, Volpe Jr. A, Andersson A, Burrington J. Enhancement of acrylic acid yields in propane and propylene oxidation by selective P Doping of MoV(Nb)TeO-based M1 and M2 catalysts. Catal Today 2010. [DOI: 10.1016/j.cattod.2010.01.044] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
46
|
Andersson A, Brösel S, Knosalla C, Shultz LD, Egger D, Volk HD, Schmitt-Knosalla I. Analysis of the lymphoid system in NOD/LtSz-scid IL2Rγ(null) mice engrafted with purified cord blood derived stem cells. J Stem Cells Regen Med 2010; 6:91-92. [PMID: 24693109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Affiliation(s)
| | - S Brösel
- Charité Berlin , Berlin, Germany
| | | | - L D Shultz
- The Jackson Laboratory , Maine, United States
| | - D Egger
- Vita 34 AG , Leipzig, Germany
| | - H-D Volk
- Charité Berlin , Berlin, Germany ; Berlin-Brandenburg Center for Regenerative Therapies , Berlin, Germany
| | | |
Collapse
|
47
|
Andersson A, Fenhammar J, Weitzberg E, Sollevi A, Hjelmqvist H, Frithiof R. Endothelin-mediated gut microcirculatory dysfunction during porcine endotoxaemia. Br J Anaesth 2010; 105:640-7. [PMID: 20710019 DOI: 10.1093/bja/aeq217] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND The potent vasoconstrictor endothelin-1 has been implicated in the pathogenesis of the microcirculatory dysfunction seen in sepsis. The mixed endothelin receptor antagonist tezosentan and the selective endothelin A-receptor antagonist TBC3711 were used to investigate the importance of the different endothelin receptors in modulating splanchnic regional blood flow and microvascular blood flow in endotoxaemia. METHODS Eighteen anaesthetized pigs were i.v. infused with endotoxin (Escherichia coli lipopolysaccharide, serotype 0111:b4) for 300 min. After 120 min, six animals received tezosentan and six animals received TBC3711. Six animals served as endotoxin-treated controls. Laser Doppler flowmetry was used to measure microcirculatory blood flow in the liver and ileum. Superior mesenteric artery flow (SMA(FI)) and portal vein flow (PV(FI)) were measured with ultrasonic flow probes, and air tonometry was used to measure Pco₂ in the ileal mucosa. RESULTS TBC3711 did not improve splanchnic regional blood flow or splanchnic microvascular blood flow compared with endotoxin-treated controls. Tezosentan increased PV(FI) (P<0.05), but SMA(FI) was not improved compared with the other groups. In the tezosentan group, microvascular blood flow in the ileal mucosa (MCQ(muc)) improved and mucosal-arterial Pco₂ gap decreased (P<0.05 for both) compared with endotoxin-treated controls and the TBC3711 group. CONCLUSIONS Tezosentan improved MCQ(muc) without any concomitant increase in SMA(FI), implying a direct positive effect on the microcirculation. TBC3711 was not effective in improving regional splanchnic blood flow or splanchnic microvascular blood flow. Dual endothelin receptor antagonism was necessary to improve MCQ(muc), indicating a role for the endothelin B-receptor in mediating the microcirculatory failure in the ileal mucosa.
Collapse
Affiliation(s)
- A Andersson
- Department of Anaesthesiology and Intensive Care, Karolinska University Hospital, Huddinge, Sweden.
| | | | | | | | | | | |
Collapse
|
48
|
Wikner J, Andersson A, Normark S, Hagström A. Use of genetically marked minicells as a probe in measurement of predation on bacteria in aquatic environments. Appl Environ Microbiol 2010; 52:4-8. [PMID: 16347116 PMCID: PMC203384 DOI: 10.1128/aem.52.1.4-8.1986] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Minicells produced by Escherichia coli M2141 were used as probes to measure predation on pelagic bacteria in situ. The minicells, labeled with [S]methionine in one specific protein, were shown to disappear in the presence of a microflagellate (Ochromonas sp.), as seen by a decrease in the amount of labeled marker protein with time. Incubation in filtered (pore size, 0.2 mum) and autoclaved seawater did not affect the amount of labeled marker protein in the minicell. The generation time of flagellates feeding on minicells was determined to be similar to that found for flagellates grown on seawater bacteria or living E. coli NC3. Data indicate that minicells are seen as true food particles by the flagellates. The minicell probe was used in recapture experiments, in which predation in situ on pelagic bacteria was demonstrated. The rate of bacterial production showed a clear covariation with the rate of predation, both in different sea areas and in depth profiles. The obtained results (11 field experiments) showed that the rate of predation, on average, accounts for the consumption of 62% of the bacteria produced.
Collapse
Affiliation(s)
- J Wikner
- Department of Microbiology, University of Umeå, S-901 87 Umeå, Sweden
| | | | | | | |
Collapse
|
49
|
Ekerljung L, Andersson A, Sundblad BM, Rönmark E, Larsson K, Ahlstedt S, Dahlén SE, Lundbäck B. Has the increase in the prevalence of asthma and respiratory symptoms reached a plateau in Stockholm, Sweden? Int J Tuberc Lung Dis 2010; 14:764-771. [PMID: 20487617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Abstract
SETTING An increase in the prevalence of asthma has previously been reported worldwide. However, the current trend is debatable. OBJECTIVE To assess changes in the prevalence of asthma and respiratory symptoms in a defined study area in Stockholm, Sweden, using identical methods. DESIGN A questionnaire was sent by mail in 1996 and 2007 to randomly selected subjects aged 20-69 years. On both occasions, 8000 subjects received the questionnaire, with response rates of 72% and 68%, respectively. Questions on asthma, respiratory symptoms, asthma medication and possible determinants were included. Logistic regression analysis was used to assess determinants. RESULTS Ever asthma increased from 8.7% in 1996 to 11.0% in 2007 and physician-diagnosed asthma from 7.6% to 9.3%. The proportion of asthma patients reporting one to two symptoms increased by 14% during the study period. There were few significant changes in the prevalence of respiratory symptoms: wheeze in the previous 12 months (15.9-17.3%), wheezing with breathlessness apart from cold (3.2-4.1%) and recurrent wheeze (8.3-6.8%). There was no major difference in the risk factor pattern between the surveys. CONCLUSION An increase in the prevalence of asthma with few symptoms as well as an unchanged prevalence of symptoms was demonstrated, which may indicate a change in diagnostic practices.
Collapse
Affiliation(s)
- L Ekerljung
- Department of Internal Medicine, Krefting Research Centre, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Claes S, Vandezande P, Mullens S, Leysen R, De Sitter K, Andersson A, Maurer F, Van den Rul H, Peeters R, Van Bael M. High flux composite PTMSP-silica nanohybrid membranes for the pervaporation of ethanol/water mixtures. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2010.01.043] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|