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Jensen JK, Ziegler AK, Isaxon C, Jiménez-Gallardo L, Garcia Domínguez S, Nilsson JÅ, Rissler J, Isaksson C. Quantifying the influence of urban biotic and abiotic environmental factors on great tit nestling physiology. Sci Total Environ 2023; 859:160225. [PMID: 36400300 DOI: 10.1016/j.scitotenv.2022.160225] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 10/28/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
There is a long history of avian studies investigating the impacts of urbanization. While differences in several life-history traits have been documented, either between urban and rural populations or across generalized urbanization gradients, a detailed understanding of which specific environmental variables cause these phenotypic differences is still lacking. Here, we quantified several local environmental variables coupled to urbanization (air pollution, tree composition, ambient temperature, and artificial light at night [ALAN]) within territories of breeding great tits (Parus major). We linked the environmental variables to physiological measures of the nestlings (circulating fatty acid composition [FA], antioxidant capacity and an oxidative damage marker [malondialdehyde; MDA]), to garner a mechanistic understanding of the impact of urbanization. We found that the antioxidant capacity of nestlings decreased with higher numbers of oak trees and levels of PM2.5 (airborne particulate matter with a diameter < 2.5 μm). Furthermore, the ratio of ω6:ω3 polyunsaturated FAs, important for immune function, was positively correlated with PM2.5 concentration, while being negatively associated with ambient temperature and number of non-native trees in the territory. Body mass and wing length both increased with the number of local oak trees. We also show, through a principal component analysis, that while the environmental variables fall into an urbanization gradient, this gradient is insufficient to explain the observed physiological responses. Therefore, accounting for individual environmental variables in parallel, and thus allowing for interactions between these, is crucial to fully understand the urban ecosystem.
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Affiliation(s)
- Johan Kjellberg Jensen
- Department of Biology, Lund University, Lund, Sweden; Centre for Environmental and Climate Science (CEC), Lund University, Lund, Sweden.
| | | | - Christina Isaxon
- NanoLund, Lund University, Lund, Sweden; Ergonomics and Aerosol Technology, Lund University, Lund, Sweden
| | - Lucía Jiménez-Gallardo
- Department of Biodiversity, Ecology and Evolution, Complutense University of Madrid, Madrid, Spain
| | | | | | - Jenny Rissler
- NanoLund, Lund University, Lund, Sweden; Ergonomics and Aerosol Technology, Lund University, Lund, Sweden; Bioeconomy and Health, RISE Research Institutes of Sweden, Lund, Sweden
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2
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Zanini G, Mishtal J, De Zordo S, Ziegler AK, Gerdts C. Abortion information governance and women's travels across European borders. Women's Studies International Forum 2021. [DOI: 10.1016/j.wsif.2021.102496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ziegler AK, Watson H, Hegemann A, Meitern R, Canoine V, Nilsson JÅ, Isaksson C. Exposure to artificial light at night alters innate immune response in wild great tit nestlings. J Exp Biol 2021; 224:jeb.239350. [PMID: 33771912 PMCID: PMC8180251 DOI: 10.1242/jeb.239350] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 03/22/2021] [Indexed: 12/12/2022]
Abstract
The large-scale impact of urbanization on wildlife is rather well documented; however, the mechanisms underlying the effects of urban environments on animal physiology and behaviour are still poorly understood. Here, we focused on one major urban pollutant - artificial light at night (ALAN) - and its effects on the capacity to mount an innate immune response in wild great tit (Parus major) nestlings. Exposure to ALAN alters circadian rhythms of physiological processes, by disrupting the nocturnal production of the hormone melatonin. Nestlings were exposed to a light source emitting 3 lx for seven consecutive nights. Subsequently, nestlings were immune challenged with a lipopolysaccharide injection, and we measured haptoglobin and nitric oxide levels pre- and post-injection. Both haptoglobin and nitric oxide are important markers for innate immune function. We found that ALAN exposure altered the innate immune response, with nestlings exposed to ALAN having lower haptoglobin and higher nitric oxide levels after the immune challenge compared with dark-night nestlings. Unexpectedly, nitric oxide levels were overall lower after the immune challenge than before. These effects were probably mediated by melatonin, as ALAN-treated birds had on average 49% lower melatonin levels than the dark-night birds. ALAN exposure did not have any clear effects on nestling growth. This study provides a potential physiological mechanism underlying the documented differences in immune function between urban and rural birds observed in other studies. Moreover, it gives evidence that ALAN exposure affects nestling physiology, potentially causing long-term effects on physiology and behaviour, which ultimately can affect their fitness.
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Affiliation(s)
| | - Hannah Watson
- Department of Biology, Lund University, 223 62 Lund, Sweden
| | - Arne Hegemann
- Department of Biology, Lund University, 223 62 Lund, Sweden
| | - Richard Meitern
- Department of Zoology, University of Tartu, 51005 Tartu, Estonia
| | - Virginie Canoine
- Department of Behavioural and Cognitive Biology, University of Vienna, 1090Vienna, Austria
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Ziegler AK, Damgaard A, Mackey AL, Schjerling P, Magnusson P, Olesen AT, Kjaer M, Scheele C. An anti-inflammatory phenotype in visceral adipose tissue of old lean mice, augmented by exercise. Sci Rep 2019; 9:12069. [PMID: 31427677 PMCID: PMC6700172 DOI: 10.1038/s41598-019-48587-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 09/04/2018] [Accepted: 08/07/2019] [Indexed: 02/07/2023] Open
Abstract
Visceral adipose tissue is an immunogenic tissue, which turns detrimental during obesity by activation of proinflammatory macrophages. During aging, chronic inflammation increases proportional to visceral adipose tissue (VAT) mass and associates with escalating morbidity and mortality. Here, we utilize a mouse model to investigate the inflammatory status of visceral adipose tissue in lean aging mice and assess the effects of exercise training interventions. We randomized adult (11 months; n = 21) and old (23 months; n = 27) mice to resistance training (RT) or endurance training (ET), or to a sedentary control group (S). Strikingly, we observed an anti-inflammatory phenotype in the old mice, consisting of higher accumulation of M2 macrophages and IL-10 expression, compared to the adult mice. In concordance, old mice also had less VAT mass and smaller adipocytes compared to adult mice. In both age groups, exercise training enhanced the anti-inflammatory phenotype and increased PGC1-α mRNA expression. Intriguingly, the brown adipose tissue marker UCP1 was modestly higher in old mice, while remained unchanged by the intervention. In conclusion, in the absence of obesity, visceral adipose tissue possesses a pronounced anti-inflammatory phenotype during aging which is further enhanced by exercise.
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Affiliation(s)
- A K Ziegler
- Institute of Sports Medicine Copenhagen, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark. .,Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Healthy and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - A Damgaard
- Institute of Sports Medicine Copenhagen, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - A L Mackey
- Institute of Sports Medicine Copenhagen, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Healthy and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - P Schjerling
- Institute of Sports Medicine Copenhagen, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - P Magnusson
- Institute of Sports Medicine Copenhagen, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Physical Therapy, Musculoskeletal Rehabilitation Research Unit, Bispebjerg Hospital, Copenhagen, Denmark
| | - A T Olesen
- Institute of Sports Medicine Copenhagen, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - M Kjaer
- Institute of Sports Medicine Copenhagen, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Healthy and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - C Scheele
- The Centre of Inflammation and Metabolism and Centre for Physical Activity Research Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark.,Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Giraudeau M, Ziegler AK, Mcgraw KJ, Okuliarová M, Zeman M, Tschirren B. In ovo yolk carotenoid and testosterone levels interactively influence female transfer of yolk antioxidants to her eggs. Biol Lett 2018; 14:rsbl.2018.0103. [PMID: 29875206 DOI: 10.1098/rsbl.2018.0103] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 05/03/2018] [Indexed: 11/12/2022] Open
Abstract
Mothers can influence prenatal conditions by varying the amount of nutrients, hormones or antioxidants they provide to their developing young. Some of these substances even affect the transfer of these compounds in the next generation, but it is less clear how different maternally transmitted compounds interact with each other to shape reproductive resource allocation in their offspring. Here, we found that female Japanese quails (Coturnix japonica) that were exposed to high carotenoid levels during embryonic development transferred lower concentrations of yolk antioxidants to their own eggs later in life. This effect disappeared when both testosterone and carotenoid concentrations were manipulated simultaneously, showing long-term and interactive effects of these maternally derived egg components on a female's own egg composition. Given that exposure to high levels of testosterone during embryo development stimulates the production of reactive oxygen species (ROS) and impairs antioxidant defenses, we propose that carotenoids act as in ovo antioxidants in an oxidatively stressful environment (i.e. when levels of testosterone are high) but might have prooxidant properties in an environment where they are not used to counteract an increased production of ROS. In line with this hypothesis, we previously showed that prenatal exposure to increased concentrations of yolk carotenoids leads to a rise of oxidative damage at adulthood, but only when yolk testosterone concentrations were not experimentally increased as well. As a consequence, antioxidants in the body may be used to limit oxidative damage in females exposed to high levels of carotenoids during development (but not in females exposed to increased levels of both carotenoids and testosterone), resulting in lower amounts of antioxidants being available for deposition into eggs. Since prenatal antioxidant exposure is known to influence fitness-related traits, the effect detected in this study might have transgenerational consequences.
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Affiliation(s)
- Mathieu Giraudeau
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA .,Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall TR10 9FE, UK.,Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Switzerland
| | - Ann-Kathrin Ziegler
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Switzerland.,Department of Biology, Lund University, Sölvegatan 37, Lund, Sweden
| | - Kevin J Mcgraw
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA
| | - Monika Okuliarová
- Department of Animal Physiology and Ethology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15, Bratislava, Slovakia
| | - Michal Zeman
- Department of Animal Physiology and Ethology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15, Bratislava, Slovakia
| | - Barbara Tschirren
- Centre for Ecology and Conservation, University of Exeter, Penryn, Cornwall TR10 9FE, UK.,Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Switzerland
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Giraudeau M, Ziegler AK, Tschirren B. Long-term effect of yolk carotenoid levels on testis size in a precocial bird. Biol Lett 2017; 12:rsbl.2016.0008. [PMID: 27122006 DOI: 10.1098/rsbl.2016.0008] [Citation(s) in RCA: 7] [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: 01/05/2016] [Accepted: 04/05/2016] [Indexed: 11/12/2022] Open
Abstract
Conditions experienced during prenatal development can have long-lasting organizational effects on offspring. Maternal carotenoids deposited in the eggs of birds and other oviparous species play an important role during fast embryonic growth and chick development through their antioxidant properties. However, the long-term consequences of variation in maternal carotenoid transfer for the offspring have seldom been considered. Since plasma carotenoid levels at adulthood are known to influence testis size and yolk carotenoid levels influence the ability to extract carotenoids later in life, we hypothesized that maternally transmitted carotenoids might influence gonad size at adulthood. Here, we showed that male Japanese quail (Coturnix japonica) originating from a carotenoid-enriched egg had smaller testes than control individuals at adulthood. This result shows that yolk carotenoids have long-term organizational effects. In addition, given that carotenoid intake at sexual maturity increases sperm quality and that a decreased testis size is associated with a lower sperm production, we propose that carotenoid exposure during embryo development might influence a trade-off between ejaculate size and sperm quality.
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Affiliation(s)
- Mathieu Giraudeau
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, 8057 Zurich, Switzerland School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, Cornwall, TR10 9FE, UK
| | - Ann-Kathrin Ziegler
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, 8057 Zurich, Switzerland
| | - Barbara Tschirren
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, 8057 Zurich, Switzerland
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Tschirren B, Ziegler AK, Pick JL, Okuliarová M, Zeman M, Giraudeau M. Matrilineal inheritance of a key mediator of prenatal maternal effects. Proc Biol Sci 2016; 283:20161676. [PMID: 27629040 PMCID: PMC5031669 DOI: 10.1098/rspb.2016.1676] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 08/24/2016] [Indexed: 11/12/2022] Open
Abstract
Sex-linkage is predicted to evolve in response to sex-specific or sexually antagonistic selection. In line with this prediction, most sex-linked genes are associated with reproduction in the respective sex. In addition to traits directly involved in fertility and fecundity, mediators of maternal effects may be predisposed to evolve sex-linkage, because they indirectly affect female fitness through their effect on offspring phenotype. Here, we test for sex-linked inheritance of a key mediator of prenatal maternal effects in oviparous species, the transfer of maternally derived testosterone to the eggs. Consistent with maternal inheritance, we found that in Japanese quail (Coturnix japonica) granddaughters resemble their maternal (but not their paternal) grandmother in yolk testosterone deposition. This pattern of resemblance was not due to non-genetic priming effects of testosterone exposure during prenatal development, as an experimental manipulation of yolk testosterone levels did not affect the females' testosterone transfer to their own eggs later in life. Instead, W chromosome and/or mitochondrial variation may underlie the observed matrilineal inheritance pattern. Ultimately, the inheritance of mediators of maternal effects along the maternal line will allow for a fast and direct response to female-specific selection, thereby affecting the dynamics of evolutionary processes mediated by maternal effects.
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Affiliation(s)
- Barbara Tschirren
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Ann-Kathrin Ziegler
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Joel L Pick
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Monika Okuliarová
- Department of Animal Physiology and Ethology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovak Republic
| | - Michal Zeman
- Department of Animal Physiology and Ethology, Faculty of Natural Sciences, Comenius University, Bratislava, Slovak Republic
| | - Mathieu Giraudeau
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, UK
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Pick JL, Hutter P, Ebneter C, Ziegler AK, Giordano M, Tschirren B. Artificial selection reveals the energetic expense of producing larger eggs. Front Zool 2016; 13:38. [PMID: 27559356 PMCID: PMC4995767 DOI: 10.1186/s12983-016-0172-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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: 03/18/2016] [Accepted: 08/18/2016] [Indexed: 12/23/2022] Open
Abstract
Background The amount of resources provided by the mother before birth has important and long-lasting effects on offspring fitness. Despite this, there is a large amount of variation in maternal investment seen in natural populations. Life-history theory predicts that this variation is maintained through a trade-off between the benefits of high maternal investment for the offspring and the costs of high investment for the mother. However, the proximate mechanisms underlying these costs of reproduction are not well understood. Here we used artificial selection for high and low maternal egg investment in a precocial bird, the Japanese quail (Coturnix japonica) to quantify costs of maternal reproductive investment. Results We show that females from the high maternal investment lines had significantly larger reproductive organs, which explained their overall larger body mass, and resulted in a higher resting metabolic rate (RMR). Contrary to our expectations, this increase in metabolic activity did not lead to a higher level of oxidative damage. Conclusions This study is the first to provide experimental evidence for metabolic costs of increased per offspring investment.
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Affiliation(s)
- Joel L Pick
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Pascale Hutter
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Christina Ebneter
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Ann-Kathrin Ziegler
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Marta Giordano
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Barbara Tschirren
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
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Giraudeau M, Ziegler AK, Pick JL, Ducatez S, Canale CI, Tschirren B. Interactive effects of yolk testosterone and carotenoid on prenatal growth and offspring physiology in a precocial bird. Behav Ecol 2016. [DOI: 10.1093/beheco/arw127] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tschirren B, Ziegler AK, Canale CI, Okuliarová M, Zeman M, Giraudeau M. High Yolk Testosterone Transfer Is Associated with an Increased Female Metabolic Rate. Physiol Biochem Zool 2016; 89:448-52. [PMID: 27617364 DOI: 10.1086/687571] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Yolk androgens of maternal origin are important mediators of prenatal maternal effects. Although in many species short-term benefits of exposure to high yolk androgen concentrations for the offspring have been observed, females differ substantially in the amount of androgens they transfer to their eggs. It suggests that costs for the offspring or the mother constrain the evolution of maternal hormone transfer. However, to date, the nature of these costs remains poorly understood. Unlike most previous work that focused on potential costs for the offspring, we here investigated whether high yolk testosterone transfer is associated with metabolic costs (i.e., a higher metabolic rate) for the mother. We show that Japanese quail (Coturnix japonica) females that deposit higher testosterone concentrations into their eggs have a higher resting metabolic rate. Because a higher metabolic rate is often associated with a shorter life span, this relationship may explain the negative association between yolk testosterone transfer and female longevity observed in the wild. Our results suggest that metabolic costs for the mother can balance the short-term benefits of yolk testosterone exposure for the offspring, thereby contributing to the maintenance of variation in maternal yolk hormone transfer in natural populations.
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Ziegler AK, Bertog S, Kaltenbach B, Id D, Franke J, Hofmann I, Vaskelyte L, Sievert H. Efficacy and safety of renal denervation in elderly patients with resistant hypertension. Catheter Cardiovasc Interv 2015; 86:299-303. [DOI: 10.1002/ccd.25166] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 07/18/2013] [Accepted: 08/22/2013] [Indexed: 11/10/2022]
Affiliation(s)
| | | | | | - Dani Id
- CardioVascular Center Frankfurt; Frankfurt Germany
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Id D, Bertog SC, Ziegler AK, Hornung M, Hofmann I, Vaskelyte L, Matic P, Gafoor S, Sievert H. Predictors of blood pressure response: Obesity is associated with a less pronounced treatment response after renal denervation. Catheter Cardiovasc Interv 2015; 87:E30-8. [PMID: 26104216 DOI: 10.1002/ccd.26068] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 05/19/2015] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The purpose of this study was to identify predictors of BP response. BACKGROUND Catheter-based renal denervation (RDN) causes significant blood pressure (BP) reductions in a large number of patients with resistant hypertension. METHODS One hundred one consecutive patients with resistant hypertension who underwent RDN with the Symplicity™ catheter were included in this retrospective study. Primary endpoint was the change in office systolic BP after 6 months. Uni- and multivariate logistic regression analyses were performed to detect baseline predictors of a significant BP response 6 months after RDN (age, gender, office and ambulatory BP, renal function, body mass index [BMI], diabetes mellitus, antihypertensive medication, number of ablations). RESULTS The procedure was technically uneventful in all patients. Mean BP at baseline was 166.6/90.2 ± 22.5/16.4 mmHg and decreased by -14.7 (P < 0.0001)/-5.3 (P < 0.001) ± 22.8/14.1 mm Hg at 6-month follow-up. Similarly, paired analysis of 24-hr-ambulatory BP measurement (n = 71) showed a significant reduction of mean systolic BP by 6.8 ± 14.4 mm Hg (P < 0.0002). Upon univariate analyses, a higher baseline office systolic BP (P < 0.0001) and lower BMI (P = 0.014) were identified as significant predictors of the magnitude of BP response after 6 months. Importantly, on multivariate analysis, baseline office systolic BP (standardized ß = -0.46; r = -0.47; P < 0.0001) and BMI (standardized ß = 0.21; r = 0.95; P = 0.019) remained significant. CONCLUSION Blood pressure reductions after RDN were more pronounced in patients with higher baseline blood pressure and lower BMI. These findings may have implications regarding patient selection for renal denervation. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Dani Id
- CardioVascular Center Frankfurt, Germany
| | - Stefan C Bertog
- CardioVascular Center Frankfurt, Germany.,Veterans Affairs Medical Center, Minneapolis, Minnesota, USA
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Id D, Bertog SC, Ziegler AK, Hornung M, Hofmann I, Vaskelyte L, Gafoor S, Sievert H. TCT-414 Obesity Is Associated With A Less Pronounced Treatment Response After Renal Denervation. J Am Coll Cardiol 2014. [DOI: 10.1016/j.jacc.2014.07.463] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ziegler AK, Franke J, Bertog SC. Renal denervation in a patient with prior renal artery stenting. Catheter Cardiovasc Interv 2012; 81:342-5. [DOI: 10.1002/ccd.24507] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2011] [Revised: 04/11/2012] [Accepted: 05/20/2012] [Indexed: 11/10/2022]
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Abstract
Twenty-four college tennis players were tested for bilateral shoulder internal/external rotation strength on a Cybex 340 isokinetic dynamometer; they were positioned supine with the glenohumeral joint abducted to 90 degrees. Subjects produced significantly (P less than 0.01) more torque in internal rotation at 60 and 300 deg/sec in the dominant arm compared to the nondominant arm. Subjects also produced significantly more power in internal rotation at 60 deg/sec in the dominant arm. No significant differences between the dominant and nondominant arms were seen in internal rotation power at 300 deg/sec or in the internal rotation endurance ratio. No significant differences were seen in external rotation on any measurement. By significantly increasing the strength of the dominant shoulder in internal rotation without subsequent strengthening of the external rotators, muscle imbalances may be created in the dominant arm that could possibly affect the tennis player's predisposition to injuries caused by overloading of the shoulder joint. This study suggests that external rotation strengthening exercises should be implemented in tennis conditioning programs to maintain muscle strength balance, and possibly reduce the chance of overload injury.
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Affiliation(s)
- T J Chandler
- Lexington Clinic Sports Medicine Center, KY 40509
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