1
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O'Brown NM, Patel NB, Hartmann U, Klein AM, Gu C, Megason SG. The secreted neuronal signal Spock1 promotes blood-brain barrier development. Dev Cell 2023; 58:1534-1547.e6. [PMID: 37437574 PMCID: PMC10525910 DOI: 10.1016/j.devcel.2023.06.005] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 03/07/2023] [Accepted: 06/16/2023] [Indexed: 07/14/2023]
Abstract
The blood-brain barrier (BBB) is a unique set of properties of the brain vasculature which severely restrict its permeability to proteins and small molecules. Classic chick-quail chimera studies have shown that these properties are not intrinsic to the brain vasculature but rather are induced by surrounding neural tissue. Here, we identify Spock1 as a candidate neuronal signal for regulating BBB permeability in zebrafish and mice. Mosaic genetic analysis shows that neuronally expressed Spock1 is cell non-autonomously required for a functional BBB. Leakage in spock1 mutants is associated with altered extracellular matrix (ECM), increased endothelial transcytosis, and altered pericyte-endothelial interactions. Furthermore, a single dose of recombinant SPOCK1 partially restores BBB function in spock1 mutants by quenching gelatinase activity and restoring vascular expression of BBB genes including mcamb. These analyses support a model in which neuronally secreted Spock1 initiates BBB properties by altering the ECM, thereby regulating pericyte-endothelial interactions and downstream vascular gene expression.
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Affiliation(s)
- Natasha M O'Brown
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA.
| | - Nikit B Patel
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA
| | - Ursula Hartmann
- Center for Biochemistry, Medical Faculty, University of Cologne, Joseph-Stelzmann-Str. 52, 50931 Cologne, Germany
| | - Allon M Klein
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA
| | - Chenghua Gu
- Howard Hughes Medical Institute, Department of Neurobiology, Harvard Medical School, 220 Longwood Ave, Boston, MA 02115, USA
| | - Sean G Megason
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA.
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2
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Weber A, Hartmann U, Werth J, Epro G, Seeley J, Nickel P, Karamanidis K. Enhancement of awareness through feedback does not lead to interlimb transfer of obstacle crossing in virtual reality. J Biomech 2023; 153:111600. [PMID: 37137274 DOI: 10.1016/j.jbiomech.2023.111600] [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: 02/10/2023] [Revised: 03/22/2023] [Accepted: 04/21/2023] [Indexed: 05/05/2023]
Abstract
Locomotor skill transfer is an essential feature of motor adaptation and represents the generalization of learned skills. We previously showed that gait adaptation after crossing virtual obstacles did not transfer to the untrained limb and suggested it may be due to missing feedback of performance. This study investigated whether providing feedback and an explicit goal during training would lead to transfer of adaptive skills to the untrained limb. Thirteen young adults crossed 50 virtual obstacles with one (trained) leg. Subsequently, they performed 50 trials with their other (transfer) leg upon notice about the side change. Visual feedback about crossing performance (toe clearance) was provided using a color scale. In addition, joint angles of the ankle, knee, and hip were calculated for the crossing legs. Toe clearance decreased with repeated obstacle crossing from 7.8 ± 2.7 cm to 4.6 ± 1.7 cm for the trained leg and from 6.8 ± 3.0 cm to 4.4 ± 2.0 cm (p < 0.05) for the transfer leg with similar adaptation rates between limbs. Toe clearance was significantly higher for the first trials of the transfer leg compared to the last trials of the training leg (p < 0.05). Furthermore, statistical parametric mapping revealed similar joint kinematics for trained and transfer legs in the initial training trials but differed in knee and hip joints when comparing the last trials of the trained leg with the first trials of the transfer leg. We concluded that locomotor skills acquired during a virtual obstacle crossing task are limb-specific and that enhanced awareness does not seem to improve interlimb transfer.
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Affiliation(s)
- A Weber
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom; Department of Mathematics and Technology, University of Applied Sciences Koblenz, Remagen, Germany; Institute for Occupational Safety and Health of the German Social Accident Insurance (IFA), Sankt Augustin, Germany.
| | - U Hartmann
- Department of Mathematics and Technology, University of Applied Sciences Koblenz, Remagen, Germany
| | - J Werth
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom
| | - G Epro
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom
| | - J Seeley
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom
| | - P Nickel
- Institute for Occupational Safety and Health of the German Social Accident Insurance (IFA), Sankt Augustin, Germany
| | - K Karamanidis
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom
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3
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Fazio E, Lindner A, Wegener J, Medica P, Hartmann U, Fer A. Plasma cortisol concentration during standardized exercise in Standardbred racehorses within a racing season. PFERDEHEILKUNDE 2023. [DOI: 10.21836/pem20230204] [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: 03/06/2023]
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4
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Zhang Y, Wang Y, Zheng G, Liu Y, Li J, Huang H, Xu C, Zeng Y, Zhang X, Qin J, Dai C, Hambrock HO, Hartmann U, Feng B, Mak KK, Liu Y, Lan HY, Huang Y, Zheng ZH, Xia Y. Follistatin-like 1 (FSTL1) interacts with Wnt ligands and Frizzled receptors to enhance Wnt/β-catenin signaling in obstructed kidneys in vivo. J Biol Chem 2022; 298:102010. [PMID: 35525270 PMCID: PMC9234244 DOI: 10.1016/j.jbc.2022.102010] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/22/2022] [Accepted: 04/25/2022] [Indexed: 11/30/2022] Open
Abstract
Follistatin (FS)-like 1 (FSTL1) is a member of the FS-SPARC (secreted protein, acidic and rich in cysteine) family of secreted and extracellular matrix proteins. The functions of FSTL1 have been studied in heart and lung injury as well as in wound healing; however, the role of FSTL1 in the kidney is largely unknown. Here, we show using single-cell RNA-Seq that Fstl1 was enriched in stromal cells in obstructed mouse kidneys. In addition, immunofluorescence demonstrated that FSTL1 expression was induced in fibroblasts during kidney fibrogenesis in mice and human patients. We demonstrate that FSTL1 overexpression increased renal fibrosis and activated the Wnt/β-catenin signaling pathway, known to promote kidney fibrosis, but not the transforming growth factor β (TGF-β), Notch, Hedgehog, or Yes-associated protein (YAP) signaling pathways in obstructed mouse kidneys, whereas inhibition of FSTL1 lowered Wnt/β-catenin signaling. Importantly, we show that FSTL1 interacted with Wnt ligands and the Frizzled (FZD) receptors but not the coreceptor lipoprotein receptor–related protein 6 (LRP6). Specifically, we found FSTL1 interacted with Wnt3a through its extracellular calcium–binding (EC) domain and von Willebrand factor type C–like (VWC) domain, and with FZD4 through its EC domain. Furthermore, we show that FSTL1 increased the association of Wnt3a with FZD4 and promoted Wnt/β-catenin signaling and fibrogenesis. The EC domain interacting with both Wnt3a and FZD4 also enhanced Wnt3a signaling. Therefore, we conclude that FSTL1 is a novel extracellular enhancer of the Wnt/β-catenin pathway.
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Affiliation(s)
- Yu Zhang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Yang Wang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Guoxun Zheng
- iHuman Institute, Shanghai Tech University, Shanghai 201210, China
| | - Yang Liu
- Department of Nephrology, Center of Nephrology and Urology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Jinhong Li
- Department of Nephrology, Center of Nephrology and Urology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Huihui Huang
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
| | - Chunhua Xu
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Yelin Zeng
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Xiaoyi Zhang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Jinzhong Qin
- The Key Laboratory of Model Animal for Disease Study of Ministry of Education, Model Animal Research Center, Nanjing University, Nanjing, China
| | - Chunsun Dai
- Center for Kidney Disease, The Second Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Harald O Hambrock
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany
| | - Ursula Hartmann
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany
| | - Bo Feng
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Kingston Kinglun Mak
- Guangzhou Regenerative Medicine and Health Guangdong Laboratory (GRMH-GDL), Guangzhou, China
| | - Youhua Liu
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Hui-Yao Lan
- Department of Medicine and Therapeutics, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China; Guangdong-Hong Kong Joint Laboratory for Immune and Genetic Kidney Disease, Guangdong Provincial People's Hospital and Guangdong Academy of Medical Sciences, Guangzhou, and The Chinese University of Hong Kong, Hong Kong, China
| | - Yu Huang
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon Tong, Hong Kong
| | - Zhi-Hua Zheng
- Department of Nephrology, Center of Nephrology and Urology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China.
| | - Yin Xia
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China; Guangdong-Hong Kong Joint Laboratory for Immune and Genetic Kidney Disease, Guangdong Provincial People's Hospital and Guangdong Academy of Medical Sciences, Guangzhou, and The Chinese University of Hong Kong, Hong Kong, China.
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5
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Grant MP, Henley N, Dubuissez M, Chen N, Hartmann U, Royal V, Barbier O, Pichette V, Gerarduzzi C. Sub-chronic oral exposure of tungsten induces markers of kidney injury. Am J Physiol Cell Physiol 2021; 322:C205-C217. [PMID: 34852206 DOI: 10.1152/ajpcell.00277.2021] [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] [Indexed: 11/22/2022]
Abstract
Tungsten is a naturally occurring transition element used in a broad range of applications. As a result of its extensive use, we are increasingly exposed to tungsten from our environment, including potable water, since tungsten can become bioaccessible in ground sources. The kidneys are particularly susceptible to tungsten exposure as this is the main site for tungsten excretion. In this study, we investigated the prolonged effects of tungsten on the kidneys and how this may impact injury and function. When mice were exposed to tungsten in their drinking water for 1-month, kidney function had not significantly changed. Following 3-month exposure, mice were presented with deterioration in kidney function as determined by serum and urine creatinine levels. During 3-months of tungsten exposure, murine kidneys demonstrated significant increases in the myofibroblast marker ⍺SMA, and extracellular matrix products: fibronectin, collagen, and matricellular proteins. In addition, Masson's trichrome and H&E staining revealed an increase in fibrotic tissue and vacuolization of tubular epithelial cells, respectively, from kidneys of tungsten-treated mice, indicative of renal injury. In vitro treatment of kidney fibroblasts with tungsten led to increased proliferation and upregulation of Transforming Growth Factor Beta 1 (TGFβ1), which was consistent with the appearance of fibroblast-to-myofibroblast transition (FMT) markers. Our data suggest that continuous exposure to tungsten impairs kidney function that may lead to the development of chronic kidney disease (CKD).
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Affiliation(s)
- Michael P Grant
- Department of Orthopaedics, Lady Davis Institute for Medical Research, Jewish General Hospital, Montréal, Québec, Canada; Department of Surgery, McGill University, Montréal, Québec, Montreal, Canada
| | - Nathalie Henley
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Faculté de Médecine, Centre affilié à l'Université de Montréal, Montréal, Québec, Montreal, Canada
| | - Marion Dubuissez
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Faculté de Médecine, Centre affilié à l'Université de Montréal, Montréal, Québec, Canada; Département de microbiologie, infectiologie et immunologie, Montreal, Canada
| | - Nan Chen
- Faculty of Science, University of British Columbia, Vancouver, British Columbia, Vancouver, Canada
| | - Ursula Hartmann
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Cologne, Germany
| | - Virginie Royal
- Départment de Pathologie, Hôpital Maisonneuve-Rosemont, Montréal, Québec, Montreal, Canada
| | - Olivier Barbier
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional 2508, Col San Pedro Zacatenco, C.P. 07360, Ciudad de México, CDMX, Mexico, Mexico
| | - Vincent Pichette
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Faculté de Médecine, Centre affilié à l'Université de Montréal, Montréal, Québec; Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, Québec; Département de Médecine, Faculté de Médecine, Université de Montréal, Montréal, Québec, Montreal, Canada
| | - Casimiro Gerarduzzi
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Faculté de Médecine, Centre affilié à l'Université de Montréal, Montréal, Québec; Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, Québec; Département de Médecine, Faculté de Médecine, Université de Montréal, Montréal, Québec, Montreal, Canada
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6
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Weber A, Friemert D, Hartmann U, Epro G, Seeley J, Werth J, Nickel P, Karamanidis K. Obstacle avoidance training in virtual environments leads to limb-specific locomotor adaptations but not to interlimb transfer in healthy young adults. J Biomech 2021; 120:110357. [PMID: 33725521 DOI: 10.1016/j.jbiomech.2021.110357] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 01/29/2021] [Accepted: 02/22/2021] [Indexed: 01/10/2023]
Abstract
Obstacle avoidance is one of the skills required in coping with challenging situations encountered during walking. This study examined adaptation in gait stability and its interlimb transfer in a virtual obstacle avoidance task. Twelve young adults walked on a treadmill while wearing a virtual reality headset with their body state represented in the virtual environment. At random times, but always at foot touchdown, 50 virtual obstacles of constant size appeared 0.8 m in front of the participant requiring a step over with the right leg. Early, mid and late adaptation phases were investigated by pooling data from trials 1-3, 24-26 and 48-50. One left-leg obstacle appearing after 50 right-leg trials was used to investigate interlimb transfer. Toe clearance and the anteroposterior margin of stability (MoS) at foot touchdown were calculated for the stepping leg. Toe clearance decreased over repeated practice between early and late phases from 0.13 ± 0.05 m to 0.09 ± 0.04 m (mean ± SD, p < 0.05). MoS increased from 0.05 ± 0.02 m to 0.08 ± 0.02 m (p < 0.05) between early and late phases, with no significant differences between mid and late phases. No differences were found in toe clearance and MoS between the practiced right leg for early phase and the single trial of the left leg. Obstacle avoidance during walking in a virtual environment stimulated adaptive gait improvements that were related in a nonlinear manner to practice dose, though such gait adaptations seemed to be limited in their transferability between limbs.
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Affiliation(s)
- A Weber
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom; Department of Mathematics and Technology, University of Applied Sciences Koblenz, Remagen, Germany; Institute for Occupational Safety and Health of the German Social Accident Insurance (IFA), Sankt Augustin, Germany.
| | - D Friemert
- Department of Mathematics and Technology, University of Applied Sciences Koblenz, Remagen, Germany
| | - U Hartmann
- Department of Mathematics and Technology, University of Applied Sciences Koblenz, Remagen, Germany
| | - G Epro
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom
| | - J Seeley
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom
| | - J Werth
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom
| | - P Nickel
- Institute for Occupational Safety and Health of the German Social Accident Insurance (IFA), Sankt Augustin, Germany
| | - K Karamanidis
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom
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7
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Sinke C, Engel J, Veit M, Hartmann U, Hillemacher T, Kneer J, Kruger THC. Sexual cues alter working memory performance and brain processing in men with compulsive sexual behavior. Neuroimage Clin 2020; 27:102308. [PMID: 32599553 PMCID: PMC7327301 DOI: 10.1016/j.nicl.2020.102308] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 05/29/2020] [Accepted: 06/07/2020] [Indexed: 02/06/2023]
Abstract
Pornography has been repeatedly at the centre of public attention and has been controversially discussed for a long time. However, little is known about the connection between pornographic stimuli and individual (neuronal) processing of attention and memory. Here, the impact and neural underpinnings of pornographic pictures on working memory processes in a sample of subjects with compulsive sexual behaviour was investigated. Therefore, whilst using functional magnetic resonance imaging (fMRI), a letter n-back task with neutral or pornographic pictures in the background was employed in 38 patients and 31 healthy controls. On the behavioural level, patients were slowed down by pornographic material depending on their pornography consumption in the last week, which was reflected by a higher activation in the lingual gyrus. In addition, the lingual gyrus showed a higher functional connectivity to the insula during processing of pornographic stimuli in the patient group. In contrast, healthy subjects showed faster responses when confronted with pornographic pictures only with high cognitive load. Also, patients showed a better memory for pornographic pictures in a surprise recognition task compared to controls, speaking for a higher relevance of pornographic material in the patient group. These findings are in line with the incentive salience theory of addiction, especially the higher functional connectivity to the salience network with the insula as a key hub and the higher lingual activity during processing of pornographic pictures depending on recent pornography consumption.
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Affiliation(s)
- C Sinke
- Hannover Medical School, Division of Clinical Psychology & Sexual Medicine, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover, Germany.
| | - J Engel
- Hannover Medical School, Division of Clinical Psychology & Sexual Medicine, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover, Germany
| | - M Veit
- Hannover Medical School, Division of Clinical Psychology & Sexual Medicine, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover, Germany
| | - U Hartmann
- Hannover Medical School, Division of Clinical Psychology & Sexual Medicine, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover, Germany
| | - T Hillemacher
- Department for Psychiatry and Psychotherapy, Paracelsus Medical University Nuremberg, Prof. Ernst-Nathan-Str. 1, 90419 Nürnberg, Germany; Hannover Medical School, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover, Germany
| | - J Kneer
- Hannover Medical School, Division of Clinical Psychology & Sexual Medicine, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover, Germany
| | - T H C Kruger
- Hannover Medical School, Division of Clinical Psychology & Sexual Medicine, Department of Psychiatry, Social Psychiatry and Psychotherapy, Hannover, Germany
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8
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Gerarduzzi C, Hartmann U, Leask A, Drobetsky E. The Matrix Revolution: Matricellular Proteins and Restructuring of the Cancer Microenvironment. Cancer Res 2020; 80:2705-2717. [PMID: 32193287 DOI: 10.1158/0008-5472.can-18-2098] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 12/04/2019] [Accepted: 03/17/2020] [Indexed: 11/16/2022]
Abstract
The extracellular matrix (ECM) surrounding cells is indispensable for regulating their behavior. The dynamics of ECM signaling are tightly controlled throughout growth and development. During tissue remodeling, matricellular proteins (MCP) are secreted into the ECM. These factors do not serve classical structural roles, but rather regulate matrix proteins and cell-matrix interactions to influence normal cellular functions. In the tumor microenvironment, it is becoming increasingly clear that aberrantly expressed MCPs can support multiple hallmarks of carcinogenesis by interacting with various cellular components that are coupled to an array of downstream signals. Moreover, MCPs also reorganize the biomechanical properties of the ECM to accommodate metastasis and tumor colonization. This realization is stimulating new research on MCPs as reliable and accessible biomarkers in cancer, as well as effective and selective therapeutic targets.
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Affiliation(s)
- Casimiro Gerarduzzi
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada. .,Département de Médecine, Université de Montréal, Montréal, Québec, Canada
| | - Ursula Hartmann
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany
| | - Andrew Leask
- College of Dentistry, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Elliot Drobetsky
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada.,Département de Médecine, Université de Montréal, Montréal, Québec, Canada
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9
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Heumüller SE, Talantikite M, Napoli M, Armengaud J, Mörgelin M, Hartmann U, Sengle G, Paulsson M, Moali C, Wagener R. C-terminal proteolysis of the collagen VI α3 chain by BMP-1 and proprotein convertase(s) releases endotrophin in fragments of different sizes. J Biol Chem 2019; 294:13769-13780. [PMID: 31346034 DOI: 10.1074/jbc.ra119.008641] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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: 03/28/2019] [Revised: 07/23/2019] [Indexed: 01/31/2023] Open
Abstract
The assembly of collagen VI microfibrils is a multistep process in which proteolytic processing within the C-terminal globular region of the collagen VI α3 chain plays a major role. However, the mechanisms involved remain elusive. Moreover, C5, the short and most C-terminal domain of the α3 chain, recently has been proposed to be released as an adipokine that enhances tumor progression, fibrosis, inflammation, and insulin resistance and has been named "endotrophin." Serum endotrophin could be a useful biomarker to monitor the progression of such disorders as chronic obstructive pulmonary disease, systemic sclerosis, and kidney diseases. Here, using biochemical and isotopic MS-based analyses, we found that the extracellular metalloproteinase bone morphogenetic protein 1 (BMP-1) is involved in endotrophin release and determined the exact BMP-1 cleavage site. Moreover, we provide evidence that several endotrophin-containing fragments are present in various tissues and body fluids. Among these, a large C2-C5 fragment, which contained endotrophin, was released by furin-like proprotein convertase cleavage. By using immunofluorescence microscopy and EM, we also demonstrate that these proteolytic maturations occur after secretion of collagen VI tetramers and during microfibril assembly. Differential localization of N- and C-terminal regions of the collagen VI α3 chain revealed that cleavage products are deposited in tissue and cell cultures. The detailed information on the processing of the collagen VI α3 chain reported here provides a basis for unraveling the function of endotrophin (C5) and larger endotrophin-containing fragments and for refining their use as biomarkers of disease progression.
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Affiliation(s)
| | - Maya Talantikite
- Tissue Biology and Therapeutic Engineering Laboratory, UMR5305 CNRS/University of Lyon, 69367 Lyon, France
| | - Manon Napoli
- Tissue Biology and Therapeutic Engineering Laboratory, UMR5305 CNRS/University of Lyon, 69367 Lyon, France
| | - Jean Armengaud
- Commissariat à l'Energie Atomique (CEA)-Marcoule, DRF/JOLIOT/DMTS/SPI/Li2D, Innovative Technologies for Detection and Diagnostics Laboratory, 30200 Bagnols-sur-Cèze, France
| | | | - Ursula Hartmann
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany
| | - Gerhard Sengle
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany.,Cologne Center for Musculoskeletal Biomechanics (CCMB), 50931 Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany.,Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Faculty of Medicine and University Hospital Cologne, 50931 Cologne, Germany
| | - Mats Paulsson
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany.,Cologne Center for Musculoskeletal Biomechanics (CCMB), 50931 Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany.,Cluster of Excellence Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany
| | - Catherine Moali
- Tissue Biology and Therapeutic Engineering Laboratory, UMR5305 CNRS/University of Lyon, 69367 Lyon, France
| | - Raimund Wagener
- Center for Biochemistry, Faculty of Medicine, University of Cologne, 50931 Cologne, Germany .,Cologne Center for Musculoskeletal Biomechanics (CCMB), 50931 Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
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10
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Lindner A, Wegener J, Hartmann U. Description of the training and the associated changes in some biophysical variables of Standardbred racehorses during a racing season. PFERDEHEILKUNDE 2019. [DOI: 10.21836/pem20190602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Ruthard J, Hermes G, Hartmann U, Sengle G, Pongratz G, Ostendorf B, Schneider M, Höllriegl S, Zaucke F, Wagener R, Streichert T, Klatt AR. Identification of antibodies against extracellular matrix proteins in human osteoarthritis. Biochem Biophys Res Commun 2018; 503:1273-1277. [PMID: 30001809 DOI: 10.1016/j.bbrc.2018.07.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 07/04/2018] [Accepted: 07/07/2018] [Indexed: 12/30/2022]
Abstract
We investigated the presence of autoantibodies against the extracellular matrix proteins thrombospondin-4 (TSP-4), cartilage oligomeric matrix protein (COMP), C-type lectin domain family 3 member A (CLEC3A), collagen II, collagen VI, matrilin-3, and fibrillin-2 in the serum of osteoarthritis (OA) patients. We compared those results with the presence of such antibodies in rheumatoid arthritis (RA) patients and in healthy donors (HD). Our study examines whether antibodies against extracellular proteins can be used as potential biomarkers to support the clinical diagnosis of OA. 10 OA, 10 RA patients and 10 HD were enrolled in this explorative cross-sectional study. SDS-PAGE and immunoblot were used to investigate the presence of antibodies against extracellular matrix proteins. The serum of 5/10 OA patients but 0/10 HD exhibited TSP-4 IgG isotype antibodies (P = 0.033). The serum of 8/10 OA patients but only 1/10 HD exhibited IgG isotype antibodies against TSP-4 or COMP (P = 0.005). The serum of 9/10 OA patients but only 1/10 HD exhibited IgG isotype antibodies against TSP-4, COMP or CLEC3A (P = 0.005). We found strong evidence for the presence of IgG isotype autoantibodies against the cartilage extracellular matrix proteins TSP-4, COMP and CLEC3A in OA. The detection of IgG isotype autoantibodies against TSP-4, COMP and CLEC3A may support the clinical diagnosis of OA. OA with autoantibodies against cartilage extracellular matrix proteins defines a new OA subgroup suggesting that patients with high concentrations of autoantibodies may benefit from an immune suppressive therapy.
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Affiliation(s)
- Johannes Ruthard
- Institute for Clinical Chemistry, Medical Faculty, University of Cologne, Kerpener Str. 62, 50924, Cologne, Germany
| | - Gabriele Hermes
- Institute for Clinical Chemistry, Medical Faculty, University of Cologne, Kerpener Str. 62, 50924, Cologne, Germany
| | - Ursula Hartmann
- Center for Biochemistry, Medical Faculty, University of Cologne, Joseph-Stelzmann-Str. 52, 50931, Cologne, Germany
| | - Gerhard Sengle
- Center for Biochemistry, Medical Faculty, University of Cologne, Joseph-Stelzmann-Str. 52, 50931, Cologne, Germany
| | - Georg Pongratz
- Institute for Rheumatology, Hiller Research Unit for Rheumatology, Moorenstr. 5, 40225, Düsseldorf, Germany
| | - Benedikt Ostendorf
- Institute for Rheumatology, Hiller Research Unit for Rheumatology, Moorenstr. 5, 40225, Düsseldorf, Germany
| | - Matthias Schneider
- Institute for Rheumatology, Hiller Research Unit for Rheumatology, Moorenstr. 5, 40225, Düsseldorf, Germany
| | - Stefan Höllriegl
- Sana-Dreifaltigkeitskrankenhaus, Aachener Str. 445, 50933, Cologne, Germany
| | - Frank Zaucke
- Dr Rolf M Schwiete Research Unit for Osteoarthritis, Orthopädische Universitätsklinik Friedrichsheim gGmbH, Marienburgstr. 2, 60528, Frankfurt am Main, Germany
| | - Raimund Wagener
- Center for Biochemistry, Medical Faculty, University of Cologne, Joseph-Stelzmann-Str. 52, 50931, Cologne, Germany
| | - Thomas Streichert
- Institute for Clinical Chemistry, Medical Faculty, University of Cologne, Kerpener Str. 62, 50924, Cologne, Germany
| | - Andreas R Klatt
- Institute for Clinical Chemistry, Medical Faculty, University of Cologne, Kerpener Str. 62, 50924, Cologne, Germany.
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Engel J, Veit M, Sinke C, Kneer J, Laier C, Hartmann U, Hillemacher T, Krueger T. 703 Implicit associations towards pornographic stimuli in hypersexual disorder. J Sex Med 2018. [DOI: 10.1016/j.jsxm.2018.04.611] [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]
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13
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Lau D, Elezagic D, Hermes G, Mörgelin M, Wohl AP, Koch M, Hartmann U, Höllriegl S, Wagener R, Paulsson M, Streichert T, Klatt AR. The cartilage-specific lectin C-type lectin domain family 3 member A (CLEC3A) enhances tissue plasminogen activator-mediated plasminogen activation. J Biol Chem 2017; 293:203-214. [PMID: 29146595 DOI: 10.1074/jbc.m117.818930] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 09/20/2017] [Revised: 11/03/2017] [Indexed: 01/25/2023] Open
Abstract
C-type lectin domain family 3 member A (CLEC3A) is a poorly characterized protein belonging to the superfamily of C-type lectins. Its closest homologue tetranectin binds to the kringle 4 domain of plasminogen and enhances its association with tissue plasminogen activator (tPA) thereby enhancing plasmin production, but whether CLEC3A contributes to plasminogen activation is unknown. Here, we recombinantly expressed murine and human full-length CLEC3As as well as truncated forms of CLEC3A in HEK-293 Epstein-Barr nuclear antigen (EBNA) cells. We analyzed the structure of recombinant CLEC3A by SDS-PAGE and immunoblot, glycan analysis, matrix-assisted laser desorption ionization time-of-flight mass spectrometry, size-exclusion chromatography, circular dichroism spectroscopy, and electron microscopy; compared the properties of the recombinant protein with those of CLEC3A extracted from cartilage; and investigated its tissue distribution and extracellular assembly by immunohistochemistry and immunofluorescence microscopy. We found that CLEC3A mainly occurs as a monomer, but also forms dimers and trimers, potentially via a coiled-coil α-helix. We also noted that CLEC3A can be modified with chondroitin/dermatan sulfate side chains and tends to oligomerize to form higher aggregates. We show that CLEC3A is present in resting, proliferating, and hypertrophic growth-plate cartilage and assembles into an extended extracellular network in cultures of rat chondrosarcoma cells. Further, we found that CLEC3A specifically binds to plasminogen and enhances tPA-mediated plasminogen activation. In summary, we have determined the structure, tissue distribution, and molecular function of the cartilage-specific lectin CLEC3A and show that CLEC3A binds to plasminogen and participates in tPA-mediated plasminogen activation.
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Affiliation(s)
- Daniela Lau
- Institute for Clinical Chemistry, University of Cologne, D-50924 Cologne, Germany
| | - Dzemal Elezagic
- Institute for Clinical Chemistry, University of Cologne, D-50924 Cologne, Germany
| | - Gabriele Hermes
- Institute for Clinical Chemistry, University of Cologne, D-50924 Cologne, Germany
| | - Matthias Mörgelin
- Department of Clinical Sciences Lund, Division of Infection Medicine, Biomedical Center (BMC), Lund University, SE-221 00 Lund, Sweden
| | - Alexander P Wohl
- Center for Biochemistry, Medical Faculty, University of Cologne, D-50931 Cologne, Germany
| | - Manuel Koch
- Center for Biochemistry, Medical Faculty, University of Cologne, D-50931 Cologne, Germany; Institute for Dental Research and Oral Musculoskeletal Biology, Medical Faculty, University of Cologne, D-50931 Cologne, Germany
| | - Ursula Hartmann
- Center for Biochemistry, Medical Faculty, University of Cologne, D-50931 Cologne, Germany
| | | | - Raimund Wagener
- Center for Biochemistry, Medical Faculty, University of Cologne, D-50931 Cologne, Germany; Center for Molecular Medicine Cologne (CMMC), University of Cologne, D-50931 Cologne, Germany
| | - Mats Paulsson
- Center for Biochemistry, Medical Faculty, University of Cologne, D-50931 Cologne, Germany; Center for Molecular Medicine Cologne (CMMC), University of Cologne, D-50931 Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Ageing-associated Diseases (CECAD), University of Cologne, D-50931 Cologne, Germany
| | - Thomas Streichert
- Institute for Clinical Chemistry, University of Cologne, D-50924 Cologne, Germany
| | - Andreas R Klatt
- Institute for Clinical Chemistry, University of Cologne, D-50924 Cologne, Germany.
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Uder B, Hartmann U. A convenient method for large-scale STM mapping of freestanding atomically thin conductive membranes. Rev Sci Instrum 2017; 88:063702. [PMID: 28667998 DOI: 10.1063/1.4985003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Two-dimensional atomically flat sheets with a high flexibility are very attractive as ultrathin membranes but are also inherently challenging for microscopic investigations. We report on a method using Scanning Tunneling Microscopy (STM) under ultra-high vacuum conditions for large-scale mapping of several-micrometer-sized freestanding single and multilayer graphene membranes. This is achieved by operating the STM at unusual parameters. We found that large-scale scanning on atomically thin membranes delivers valuable results using very high tip-scan speeds combined with high feedback-loop gain and low tunneling currents. The method ultimately relies on the particular behavior of the freestanding membrane in the STM which is much different from that of a solid substrate.
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Affiliation(s)
- B Uder
- Institute of Experimental Physics, Saarland University, Saarbruecken D-66041, Germany
| | - U Hartmann
- Institute of Experimental Physics, Saarland University, Saarbruecken D-66041, Germany
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Franko A, Kunze A, Böse M, von Kleist-Retzow JC, Paulsson M, Hartmann U, Wiesner RJ. Impaired Insulin Signaling is Associated with Hepatic Mitochondrial Dysfunction in IR +/--IRS-1 +/- Double Heterozygous (IR-IRS1dh) Mice. Int J Mol Sci 2017; 18:ijms18061156. [PMID: 28556799 PMCID: PMC5485980 DOI: 10.3390/ijms18061156] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 05/21/2017] [Accepted: 05/25/2017] [Indexed: 12/20/2022] Open
Abstract
Mitochondria play a pivotal role in energy metabolism, but whether insulin signaling per se could regulate mitochondrial function has not been identified yet. To investigate whether mitochondrial function is regulated by insulin signaling, we analyzed muscle and liver of insulin receptor (IR)+/−-insulin receptor substrate-1 (IRS-1)+/− double heterozygous (IR-IRS1dh) mice, a well described model for insulin resistance. IR-IRS1dh mice were studied at the age of 6 and 12 months and glucose metabolism was determined by glucose and insulin tolerance tests. Mitochondrial enzyme activities, oxygen consumption, and membrane potential were assessed using spectrophotometric, respirometric, and proton motive force analysis, respectively. IR-IRS1dh mice showed elevated serum insulin levels. Hepatic mitochondrial oxygen consumption was reduced in IR-IRS1dh animals at 12 months of age. Furthermore, 6-month-old IR-IRS1dh mice demonstrated enhanced mitochondrial respiration in skeletal muscle, but a tendency of impaired glucose tolerance. On the other hand, 12-month-old IR-IRS1dh mice showed improved glucose tolerance, but normal muscle mitochondrial function. Our data revealed that deficiency in IR/IRS-1 resulted in normal or even elevated skeletal muscle, but impaired hepatic mitochondrial function, suggesting a direct cross-talk between insulin signaling and mitochondria in the liver.
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Affiliation(s)
- Andras Franko
- Institute of Vegetative Physiology, Medical Faculty, University of Köln, Robert-Koch-Str. 39, D-50931 Cologne, Germany.
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, University Hospital Tübingen, Otfried-Müller-Str. 10, D-72076 Tübingen, Germany.
| | - Alexander Kunze
- Center for Biochemistry, Medical Faculty, University of Köln, Joseph-Stelzmann-Str. 52, D-50931 Cologne, Germany.
| | - Marlen Böse
- Institute of Vegetative Physiology, Medical Faculty, University of Köln, Robert-Koch-Str. 39, D-50931 Cologne, Germany.
| | - Jürgen-Christoph von Kleist-Retzow
- Institute of Vegetative Physiology, Medical Faculty, University of Köln, Robert-Koch-Str. 39, D-50931 Cologne, Germany.
- Department of Pediatrics, University Hospital Cologne, Kerpener Str. 62, D-50937 Cologne, Germany.
| | - Mats Paulsson
- Center for Biochemistry, Medical Faculty, University of Köln, Joseph-Stelzmann-Str. 52, D-50931 Cologne, Germany.
- Center for Molecular Medicine Cologne (CMMC), University of Köln, D-50931 Cologne, Germany.
- Cologne Excellence Cluster on Cellular Stress Responses in Ageing-associated Diseases (CECAD), University of Köln, D-50931 Cologne, Germany.
| | - Ursula Hartmann
- Center for Biochemistry, Medical Faculty, University of Köln, Joseph-Stelzmann-Str. 52, D-50931 Cologne, Germany.
| | - Rudolf J Wiesner
- Institute of Vegetative Physiology, Medical Faculty, University of Köln, Robert-Koch-Str. 39, D-50931 Cologne, Germany.
- Center for Molecular Medicine Cologne (CMMC), University of Köln, D-50931 Cologne, Germany.
- Cologne Excellence Cluster on Cellular Stress Responses in Ageing-associated Diseases (CECAD), University of Köln, D-50931 Cologne, Germany.
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Barrera-Ocampo A, Arlt S, Matschke J, Hartmann U, Puig B, Ferrer I, Zürbig P, Glatzel M, Sepulveda-Falla D, Jahn H. Amyloid-β Precursor Protein Modulates the Sorting of Testican-1 and Contributes to Its Accumulation in Brain Tissue and Cerebrospinal Fluid from Patients with Alzheimer Disease. J Neuropathol Exp Neurol 2016; 75:903-16. [PMID: 27486134 PMCID: PMC5015660 DOI: 10.1093/jnen/nlw065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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] [Indexed: 12/02/2022] Open
Abstract
The mechanisms leading to amyloid-β (Aβ) accumulation in sporadic Alzheimer disease (AD) are unknown but both increased production or impaired clearance likely contribute to aggregation. To understand the potential roles of the extracellular matrix proteoglycan Testican-1 in the pathophysiology of AD, we used samples from AD patients and controls and an in vitro approach. Protein expression analysis showed increased levels of Testican-1 in frontal and temporal cortex of AD patients; histological analysis showed that Testican-1 accumulates and co-aggregates with Aβ plaques in the frontal, temporal and entorhinal cortices of AD patients. Proteomic analysis identified 10 fragments of Testican-1 in cerebrospinal fluid (CSF) from AD patients. HEK293T cells expressing human wild type or mutant Aβ precursor protein (APP) were transfected with Testican-1. The co-expression of both proteins modified the sorting of Testican-1 into the endocytic pathway leading to its transient accumulation in Golgi, which seemed to affect APP processing, as indicated by reduced Aβ40 and Aβ42 levels in APP mutant cells. In conclusion, patient data reflect a clearance impairment that may favor Aβ accumulation in AD brains and our in vitro model supports the notion that the interaction between APP and Testican-1 may be a key step in the production and aggregation of Aβ species.
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Affiliation(s)
- Alvaro Barrera-Ocampo
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
| | - Sönke Arlt
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
| | - Jakob Matschke
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
| | - Ursula Hartmann
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
| | - Berta Puig
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
| | - Isidre Ferrer
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
| | - Petra Zürbig
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
| | - Markus Glatzel
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
| | - Diego Sepulveda-Falla
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
| | - Holger Jahn
- From the Institute of Neuropathology (AB-O, JM, BP, MG, DS-F), Department of Psychiatry and Psychotherapy (SA, HJ), University Medical Center Hamburg-Eppendorf, Hamburg, Germany, Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany (UH), Institute of Neuropathology, Bellvitge University Hospital, CIBERNED, Hospitalet de Llobregat, University of Barcelona, Spain (IF), Mosaiques Diagnostics and Therapeutics AG, Hannover, Germany (PZ), and Department of Pharmaceutical Sciences, Natura Research Group, Faculty of Natural Sciences, ICESI University, Cali, Colombia (AB-O)
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Brady JJ, Chuang CH, Greenside PG, Rogers ZN, Murray CW, Caswell DR, Hartmann U, Connolly AJ, Sweet-Cordero EA, Kundaje A, Winslow MM. An Arntl2-Driven Secretome Enables Lung Adenocarcinoma Metastatic Self-Sufficiency. Cancer Cell 2016; 29:697-710. [PMID: 27150038 PMCID: PMC4864124 DOI: 10.1016/j.ccell.2016.03.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 01/23/2016] [Accepted: 03/05/2016] [Indexed: 02/06/2023]
Abstract
The ability of cancer cells to establish lethal metastatic lesions requires the survival and expansion of single cancer cells at distant sites. The factors controlling the clonal growth ability of individual cancer cells remain poorly understood. Here, we show that high expression of the transcription factor ARNTL2 predicts poor lung adenocarcinoma patient outcome. Arntl2 is required for metastatic ability in vivo and clonal growth in cell culture. Arntl2 drives metastatic self-sufficiency by orchestrating the expression of a complex pro-metastatic secretome. We identify Clock as an Arntl2 partner and functionally validate the matricellular protein Smoc2 as a pro-metastatic secreted factor. These findings shed light on the molecular mechanisms that enable single cancer cells to form allochthonous tumors in foreign tissue environments.
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Affiliation(s)
- Jennifer J Brady
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Chen-Hua Chuang
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Peyton G Greenside
- Biomedical Informatics Training Program, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Zoë N Rogers
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Christopher W Murray
- Cancer Biology Program, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Deborah R Caswell
- Cancer Biology Program, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Ursula Hartmann
- Center for Biochemistry, University of Cologne, 50931 Cologne, Germany
| | - Andrew J Connolly
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - E Alejandro Sweet-Cordero
- Cancer Biology Program, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Anshul Kundaje
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Computer Science, Stanford University, Stanford, CA 94305, USA
| | - Monte M Winslow
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA; Cancer Biology Program, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA 94305, USA.
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18
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Li Y, Niessen M, Chen X, Hartmann U. Overestimate of relative aerobic contribution with maximal accumulated oxygen deficit: a review. J Sports Med Phys Fitness 2015; 55:377-382. [PMID: 25303069] [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: 06/04/2023]
Abstract
Maximal accumulated oxygen deficit (MAOD) is widely utilized in calculating energy production during supra-maximal exercises. Since its introduction by Medbo et al. in 1988, debate on MAOD existed. The purpose of this review was to summarize the development and description of MAOD and another method of calculating energy production (Pcr-La-O₂). We reviewed similar studies on relative aerobic contribution (O₂%) and analyzed various results of O₂% calculated using MAOD or Pcr-La-O₂. An overestimate of O₂% was found when using MAOD compared to Pcr-La-O₂. The overestimate when using MAOD is likely due to the linear extrapolation of oxygen uptake at supra-maximal intensity, the neglect of anaerobic energy release and the reduced duration of each step in sub-maximal incremental test. Since it is unknown which method provides a more reliable estimation of O₂%, an exponential regression function (y=22.404 * ex + 45.176, where y=O₂% in percentage, x=duration of the supra-maximal exercise in minute) was drawn from the existing data using both methods.
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Affiliation(s)
- Y Li
- College of Physical Education and Training, Shanghai University of Sport, Shanghai, China -
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Affiliation(s)
- Y. Li
- College of Physical Education & Training, Shanghai University of Sport, Shanghai, P.R.China
| | - N. Margot
- Institute of Movement and Training Science, Faculty of Sport Science, University of Leipzig, Leipzig, Germany
| | - X. Chen
- Faculty of Physical Education, Ningbo University, P.R.China
| | - U. Hartmann
- Institute of Movement and Training Science, Faculty of Sport Science, University of Leipzig, Leipzig, Germany
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20
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Mommaerts H, Esguerra CV, Hartmann U, Luyten FP, Tylzanowski P. Smoc2 modulates embryonic myelopoiesis during zebrafish development. Dev Dyn 2014; 243:1375-90. [PMID: 25044883 DOI: 10.1002/dvdy.24164] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [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: 01/10/2014] [Revised: 06/14/2014] [Accepted: 07/02/2014] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND SMOC2 is a member of the BM-40 (SPARC) family of matricellular proteins, reported to influence signaling in the extracellular compartment. In mice, Smoc2 is expressed in many different tissues and was shown to enhance the response to angiogenic growth factors, mediate cell adhesion, keratinocyte migration, and metastasis. Additionally, SMOC2 is associated with vitiligo and craniofacial and dental defects. The function of Smoc2 during early zebrafish development has not been determined to date. RESULTS In pregastrula zebrafish embryos, smoc2 is expressed ubiquitously. As development progresses, the expression pattern becomes more anteriorly restricted. At the onset of blood cell circulation, smoc2 morphants presented a mild ventralization of posterior structures. Molecular analysis of the smoc2 morphants indicated myelopoietic defects in the rostral blood islands during segmentation stages. Hemangioblast development and further specification of the myeloid progenitor cells were shown to be impaired. Additional experiments indicated that Bmp target genes were down-regulated in smoc2 morphants. CONCLUSIONS Our findings reveal that Smoc2 is an essential player in the development of myeloid cells of the anterior lateral plate mesoderm during embryonic zebrafish development. Furthermore, our data show that Smoc2 affects the transcription of Bmp target genes without affecting initial dorsoventral patterning or mesoderm development.
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Affiliation(s)
- Hendrik Mommaerts
- Laboratory for Developmental and Stem Cell Biology, Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven - University of Leuven, Leuven, Belgium
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Affiliation(s)
- Y. Li
- Institute of Movement and Training Science II, University of Leipzig, Leipzig, Germany
| | - M. Niessen
- Institute of Movement and Training Science II, University of Leipzig, Leipzig, Germany
| | - X. Chen
- Department of Physical Education, Ningbo University, Ningbo, China
| | - U. Hartmann
- Institute of Movement and Training Science II, University of Leipzig, Leipzig, Germany
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Franko A, von Kleist-Retzow JC, Neschen S, Wu M, Schommers P, Böse M, Kunze A, Hartmann U, Sanchez-Lasheras C, Stoehr O, Huntgeburth M, Brodesser S, Irmler M, Beckers J, de Angelis MH, Paulsson M, Schubert M, Wiesner RJ. Liver adapts mitochondrial function to insulin resistant and diabetic states in mice. J Hepatol 2014; 60:816-23. [PMID: 24291365 DOI: 10.1016/j.jhep.2013.11.020] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [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: 10/26/2012] [Revised: 11/18/2013] [Accepted: 11/19/2013] [Indexed: 12/04/2022]
Abstract
BACKGROUND & AIMS To determine if diabetic and insulin-resistant states cause mitochondrial dysfunction in liver or if there is long term adaptation of mitochondrial function to these states, mice were (i) fed with a high-fat diet to induce obesity and T2D (HFD), (ii) had a genetic defect in insulin signaling causing whole body insulin resistance, but not full blown T2D (IR/IRS-1(+/-) mice), or (iii) were analyzed after treatment with streptozocin (STZ) to induce a T1D-like state. METHODS Hepatic lipid levels were measured by thin layer chromatography. Mitochondrial respiratory chain (RC) levels and function were determined by Western blot, spectrophotometric, oxygen consumption and proton motive force analysis. Gene expression was analyzed by real-time PCR and microarray. RESULTS HFD caused insulin resistance and hepatic lipid accumulation, but RC was largely unchanged. Livers from insulin resistant IR/IRS-1(+/-) mice had normal lipid contents and a normal RC, but mitochondria were less well coupled. Livers from severely hyperglycemic and hypoinsulinemic STZ mice had massively depleted lipid levels, but RC abundance was unchanged. However, liver mitochondria isolated from these animals showed increased abundance and activity of the RC, which was better coupled. CONCLUSIONS Insulin resistance, induced either by obesity or genetic manipulation and steatosis do not cause mitochondrial dysfunction in mouse liver. Also, mitochondrial dysfunction is not a prerequisite for liver steatosis. However, severe insulin deficiency and high blood glucose levels lead to an enhanced performance and better coupling of the RC. This may represent an adaptation to fuel overload and the high energy-requirement of an unsuppressed gluconeogenesis.
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Affiliation(s)
- Andras Franko
- Center for Physiology and Pathophysiology, Institute of Vegetative Physiology, University of Köln, 50931 Köln, Germany; Institute of Experimental Genetics, Helmholtz Zentrum München GmbH, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Jürgen-Christoph von Kleist-Retzow
- Center for Physiology and Pathophysiology, Institute of Vegetative Physiology, University of Köln, 50931 Köln, Germany; Department of Pediatrics, University of Köln, 50924 Köln, Germany; Center for Molecular Medicine Cologne, CMMC, University of Köln, 50931 Köln, Germany
| | - Susanne Neschen
- Institute of Experimental Genetics, Helmholtz Zentrum München GmbH, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Moya Wu
- Institute of Experimental Genetics, Helmholtz Zentrum München GmbH, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Philipp Schommers
- Center for Physiology and Pathophysiology, Institute of Vegetative Physiology, University of Köln, 50931 Köln, Germany
| | - Marlen Böse
- Center for Physiology and Pathophysiology, Institute of Vegetative Physiology, University of Köln, 50931 Köln, Germany
| | - Alexander Kunze
- Department of Biochemistry, University of Köln, 50931 Köln, Germany
| | - Ursula Hartmann
- Department of Biochemistry, University of Köln, 50931 Köln, Germany
| | - Carmen Sanchez-Lasheras
- Department of Mouse Genetics and Metabolism, Institute for Genetics, University of Köln, 50674 Köln, Germany
| | - Oliver Stoehr
- Center for Endocrinology, Diabetes and Preventive Medicine, University of Köln, 50937 Köln, Germany
| | - Michael Huntgeburth
- Department of Internal Medicine III, University of Köln, 50937 Köln, Germany
| | - Susanne Brodesser
- Institute for Medical Microbiology, Immunology and Hygiene, University of Köln, 50935 Köln, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), 50674 Köln, Germany
| | - Martin Irmler
- Institute of Experimental Genetics, Helmholtz Zentrum München GmbH, 85764 Neuherberg, Germany
| | - Johannes Beckers
- Institute of Experimental Genetics, Helmholtz Zentrum München GmbH, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Technische Universität München, WZW - Center of Life and Food Science Weihenstephan, Chair of Experimental Genetics, 85350 Freising-Weihenstephan, Germany
| | - Martin Hrabé de Angelis
- Institute of Experimental Genetics, Helmholtz Zentrum München GmbH, 85764 Neuherberg, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany; Technische Universität München, WZW - Center of Life and Food Science Weihenstephan, Chair of Experimental Genetics, 85350 Freising-Weihenstephan, Germany
| | - Mats Paulsson
- Center for Molecular Medicine Cologne, CMMC, University of Köln, 50931 Köln, Germany; Department of Biochemistry, University of Köln, 50931 Köln, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), 50674 Köln, Germany
| | - Markus Schubert
- Center for Molecular Medicine Cologne, CMMC, University of Köln, 50931 Köln, Germany; Center for Endocrinology, Diabetes and Preventive Medicine, University of Köln, 50937 Köln, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), 50674 Köln, Germany.
| | - Rudolf J Wiesner
- Center for Physiology and Pathophysiology, Institute of Vegetative Physiology, University of Köln, 50931 Köln, Germany; Center for Molecular Medicine Cologne, CMMC, University of Köln, 50931 Köln, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), 50674 Köln, Germany.
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Hartmann U, Hülsmann H, Seul J, Röll S, Midani H, Breloy I, Hechler D, Müller R, Paulsson M. Testican-3: a brain-specific proteoglycan member of the BM-40/SPARC/osteonectin family. J Neurochem 2013; 125:399-409. [DOI: 10.1111/jnc.12212] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Revised: 01/18/2013] [Accepted: 02/06/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Ursula Hartmann
- Center for Biochemistry; Medical Faculty; University of Cologne; Cologne Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-associated Diseases (CECAD); University of Cologne; Cologne Germany
| | - Hanni Hülsmann
- Center for Biochemistry; Medical Faculty; University of Cologne; Cologne Germany
| | - Judith Seul
- Center for Biochemistry; Medical Faculty; University of Cologne; Cologne Germany
| | - Sandra Röll
- Center for Biochemistry; Medical Faculty; University of Cologne; Cologne Germany
| | - Heven Midani
- Center for Biochemistry; Medical Faculty; University of Cologne; Cologne Germany
| | - Isabelle Breloy
- Center for Biochemistry; Medical Faculty; University of Cologne; Cologne Germany
| | - Daniel Hechler
- Center for Biochemistry; Medical Faculty; University of Cologne; Cologne Germany
| | - Regina Müller
- Center for Biochemistry; Medical Faculty; University of Cologne; Cologne Germany
| | - Mats Paulsson
- Center for Biochemistry; Medical Faculty; University of Cologne; Cologne Germany
- Center for Molecular Medicine (CMMC); University of Cologne; Cologne Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-associated Diseases (CECAD); University of Cologne; Cologne Germany
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Klemenčič M, Novinec M, Maier S, Hartmann U, Lenarčič B. The heparin-binding activity of secreted modular calcium-binding protein 1 (SMOC-1) modulates its cell adhesion properties. PLoS One 2013; 8:e56839. [PMID: 23437253 PMCID: PMC3578922 DOI: 10.1371/journal.pone.0056839] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Accepted: 01/15/2013] [Indexed: 02/04/2023] Open
Abstract
Secreted modular calcium-binding proteins 1 and 2 (SMOC-1 and SMOC-1) are extracellular calcium- binding proteins belonging to the BM-40 family of proteins. In this work we have identified a highly basic region in the extracellular calcium-binding (EC) domain of the SMOC-1 similar to other known glycosaminoglycan-binding motifs. Size-exclusion chromatography shows that full length SMOC-1 as well as its C-terminal EC domain alone bind heparin and heparan sulfate, but not the related chondroitin sulfate or dermatan sulfate glycosaminoglycans. Intrinsic tryptophan fluorescence measurements were used to quantify the binding of heparin to full length SMOC-1 and the EC domain alone. The calculated equilibrium dissociation constants were in the lower micromolar range. The binding site consists of two antiparallel alpha helices and mutagenesis experiments have shown that heparin-binding residues in both helices must be replaced in order to abolish heparin binding. Furthermore, we show that the SMOC-1 EC domain, like the SMOC-2 EC domain, supports the adhesion of epithelial HaCaT cells. Heparin-binding impaired mutants failed to support S1EC-mediated cell adhesion and together with the observation that S1EC in complex with soluble heparin attenuated cell adhesion we conclude that a functional and accessible S1EC heparin-binding site mediates adhesion of epithelial cells to SMOC-1.
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Affiliation(s)
- Marina Klemenčič
- Department of Chemistry and Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Marko Novinec
- Department of Chemistry and Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Silke Maier
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany
| | - Ursula Hartmann
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, Cologne, Germany
| | - Brigita Lenarčič
- Department of Chemistry and Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
- Department of Biochemistry, Molecular and Structural Biology, Jožef Stefan Institute, Ljubljana, Slovenia
- * E-mail:
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Reuss-Borst M, Hartmann U, Scheede C, Weiß J. Prevalence of osteoporosis among cancer patients in Germany: prospective data from an oncological rehabilitation clinic. Osteoporos Int 2012; 23:1437-44. [PMID: 21755400 DOI: 10.1007/s00198-011-1724-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Accepted: 06/01/2011] [Indexed: 10/18/2022]
Abstract
UNLABELLED In this prospective study, we measured bone mineral density (BMD) in 1,041 cancer patients undergoing an oncological rehabilitation program in an inpatient rehabilitation clinic. There was an osteoporosis prevalence of approximately 16%, independent of sex, which is considerably higher than in the community-dwelling population. INTRODUCTION There is evidence that cancer patients are at risk of an increased BMD-loss following the disease and its therapy. Nevertheless, there is only little data available about the prevalence of osteoporosis in German cancer patients. Therefore, we measured BMD in 1,041 oncological inpatients undergoing rehabilitation. METHODS From February 2006 to September 2009, BMD was measured in oncological patients with dual-energy x-ray absorptiometry (DXA; femur and spine). Statistical analysis for prevalence of osteoporosis was done in descriptive manner calculating means, standard deviation, frequencies, and 95% confidence intervals. To compare the prevalence of osteoporosis in different subgroups, χ (2) tests were done with p < 0.05. To create a risk profile, odds ratios were calculated using uni- and multivariate logistic regression. RESULTS In 1,041 patients with a mean age of 57.1 years (11.0 years), DXA-measures were performed. Of them, 22% were male and 78% were female. The osteoporosis prevalence was about 16% (13.8, 18.2), independent of sex (p = 0.9722) or cancer type (p = 0.7174). As risk factors influencing the development of osteoporosis, age, weight, menopausal state, and hormone replacement therapy were identified in women and weight only in men. CONCLUSIONS Compared to the general population, the rate of osteoporosis is distinctly elevated in German cancer patients independent of sex or cancer type. Hence, a general recommendation for a DXA screening in these patients appears to be justified.
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Affiliation(s)
- M Reuss-Borst
- Klinik Am Kurpark, Rehazentren DRV-Baden-Württemberg, Kurhausstr. 9, 97688 Bad Kissingen, Germany.
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Hammad TM, Griesing S, Wotocek M, Kuhn S, Hempelmann R, Hartmann U, Salem JK. Optical and magnetic properties of Zn0.98Mn0.02O nanoparticles. Appl Nanosci 2012. [DOI: 10.1007/s13204-012-0089-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kruger THC, Leeners B, Naegeli E, Schmidlin S, Schedlowski M, Hartmann U, Egli M. Prolactin secretory rhythm in women: immediate and long-term alterations after sexual contact. Hum Reprod 2012; 27:1139-43. [DOI: 10.1093/humrep/des003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Hartmann U, Kessler D, Seiter H, Reuss-Borst M. [Vocational interventions integrated in inpatient rehabilitation]. Versicherungsmedizin 2011; 63:91-96. [PMID: 21698946] [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: 05/31/2023]
Abstract
Orientation on work place associated problems is a typical assignment of medical rehabilitation in Germany. The implementation of special vocational programmes, however, may be associated with several challenges concerning staff and space required, which could be difficult to overcome.
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Affiliation(s)
- U Hartmann
- Rehaklinik Am Kurpark, Fachklinik für Rheumatologie und Onkologie, RehaZentren DRV-BW, Bad Kissingen
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Abstract
BACKGROUND Several studies could demonstrate an association between nutrition and the risk of breast cancer. PATIENTS AND METHODS In this study we examined the daily diet of German patients with breast cancer approximately 12 months after diagnosis. In a prospective trial nutritional habits were evaluated in 165 breast cancer patients on admittance to an inpatient medical rehabilitation program. RESULTS The results of this survey show that patients with breast cancer report on a nutritional pattern which is characterised by a (very) low consumption of grains, vegetables, fruits und fish and a high consumption of meat and processed meat. Due to epidemiological data, it may be hypothesized that the patients' diet might have contributed to the development of their disease. CONCLUSION Our results underscore the need for nutritional counselling of breast cancer patients, as they show a relatively unfavourable nutrition pattern which differs from currently available advice. An inpatient rehabilitation programme could be an adequate starting point for this purpose.
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Affiliation(s)
- M Reuss-Borst
- Klinik Am Kurpark, Bad Kissingen, Fachklinik für Onkologie und Lehrklinik für Ernährungsmedizin, Germany.
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Brellier F, Ruggiero S, Zwolanek D, Martina E, Hess D, Brown-Luedi M, Hartmann U, Koch M, Merlo A, Lino M, Chiquet-Ehrismann R. SMOC1 is a tenascin-C interacting protein over-expressed in brain tumors. Matrix Biol 2011; 30:225-33. [PMID: 21349332 DOI: 10.1016/j.matbio.2011.02.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 02/04/2011] [Accepted: 02/10/2011] [Indexed: 12/18/2022]
Abstract
Tenascin-C is an extracellular matrix protein over-expressed in a large variety of cancers. In the present study, we aimed at identifying new interactors of tenascin-C by purifying secreted proteins on a tenascin-C affinity column. Analysis of eluates by mass spectrometry revealed phosphoglycerate kinase 1, clusterin, fibronectin, SPARC-related modular calcium-binding protein 1 (SMOC1) and nidogen-2 as potential interactors of tenascin-C. The interaction between tenascin-C and SMOC1 was confirmed by co-immunoprecipitation and further analyzed by Surface Plasmon Resonance Spectroscopy, which revealed an apparent dissociation constant (K(D)) value of 2.59∗10(-9)M. Further analyses showed that this binding is reduced in the presence of EDTA. To investigate whether SMOC1 itself could be over-expressed in the context of tumorigenesis, we analyzed data of two independent RNA profiling studies and found that mRNA levels of SMOC1 are significantly increased in oligodendrogliomas compared to control brain samples. In support of these data, western blot analysis of protein extracts from 12 oligodendrogliomas, 4 astrocytomas and 13 glioblastomas revealed elevated levels compared to healthy brain extract. Interestingly, cell migration experiments revealed that SMOC1 can counteract the chemo-attractive effect of tenascin-C on U87 glioma cells. The present study thus identified SMOC1 as a new cancer-associated protein capable of interacting with tenascin-C in vitro.
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Affiliation(s)
- Florence Brellier
- Friedrich Miescher Institute for Biomedical Research, Novartis Research Foundation, Basel, Switzerland.
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Kunze A, Abari E, Semkova I, Paulsson M, Hartmann U. Deposition of nidogens and other basement membrane proteins in the young and aging mouse retina. Ophthalmic Res 2009; 43:108-12. [PMID: 19829017 DOI: 10.1159/000247595] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Accepted: 07/15/2009] [Indexed: 11/19/2022]
Abstract
AIM To determine the distribution of major basement membrane constituents, particularly nidogen 1 and 2, in young and aging mouse retinae. METHODS The specificity of antibodies against basement membrane proteins was ascertained by immunoblotting with proteins extracted from mouse retinae. The same antibodies were used in indirect immunofluorescence microscopy to localize basement membrane proteins in paraffin sections of retinae from 1-, 12- and 18-month-old C57BL/6 mice. RESULTS At a young age, laminin, perlecan and collagen IV were most abundant in Bruch's membrane. Later, the proteins were clearly detected in capillary basement membranes and the inner limiting membrane. In both of these basement membranes, a massive increase in protein amount was seen upon aging, whereas in Bruch's membrane the staining intensity was less drastically changed. Both nidogen 1 and 2 were present in vascular basement membranes and Bruch's membrane throughout the age periods studied. In the inner limiting membrane, the nidogens were more strongly expressed at higher ages, with an earlier and more extensive deposition of nidogen 1. CONCLUSIONS All major basement membrane constituents are present in the mouse retina, but the onset of deposition differs among the different proteins and between the various retinal basement membranes. In general, basement membrane protein deposition increases with age.
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Affiliation(s)
- Alexander Kunze
- Center for Biochemistry, Medical Faculty, University of Cologne, Cologne, Germany
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Thiel R, Winkler HM, Riel P, Neumann R, Gröhsler T, Böttcher U, Spratte S, Hartmann U. Endangered anadromous lampreys in the southern Baltic Sea: spatial distribution, long-term trend, population status. ENDANGER SPECIES RES 2009. [DOI: 10.3354/esr00222] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Hartmann U, Schmitt S, Reuss-Borst M. [Elevated liver enzymes in rheumatoid arthritis : differential diagnostic considerations based on a case report]. Z Rheumatol 2008; 67:440-4. [PMID: 18418614 DOI: 10.1007/s00393-008-0288-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Elevated liver enzymes in patients with rheumatoid arthritis may have various causes. These can range from the rheumatic disease itself, the anti-rheumatic medication or be the manifestation of an associated autoimmune disease. We present the case of a 19-year-old female with known seropositive rheumatoid arthritis who developed severe liver damage after 9 months of anti-rheumatic therapy with leflunomide and adalimumab. Both drugs were stopped. In addition to the underlying disease and the specific anti-rheumatic drugs, a temporary therapy with flucloxacillin as well as an association with newly diagnosed celiac disease had to be considered as possible causes of elevated liver enzymes. Following repeated liver biopsy, autoimmune hepatitis was assumed and prednisolone and azathioprine were initiated. Elevated liver enzymes and bilirubin rapidly returned to normal values.
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Affiliation(s)
- U Hartmann
- Fachklinik für Onkologie und Rheumatologie, Klinik "Am Kurpark", Kurhausstrasse 9, 97688, Bad Kissingen, Deutschland
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Maier S, Paulsson M, Hartmann U. The widely expressed extracellular matrix protein SMOC-2 promotes keratinocyte attachment and migration. Exp Cell Res 2008; 314:2477-87. [PMID: 18582461 DOI: 10.1016/j.yexcr.2008.05.020] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 05/30/2008] [Accepted: 05/30/2008] [Indexed: 11/28/2022]
Abstract
SMOC-2 is a recently discovered member of the BM-40/SPARC/osteonectin family of extracellular multidomain proteins of so far unknown function. While we have shown earlier that the homologous protein SMOC-1 is associated with basement membranes, in this study we demonstrate that, in the mouse, SMOC-2 could be detected in a large number of non-basement membrane localizations, often showing a diffuse tissue distribution. A more distinct expression pattern was seen in skin where SMOC-2 is mainly present in the basal layers of the epidermis. Functionally, recombinant SMOC-2 stimulated attachment of primary epidermal cells as well as several epidermal-derived cell lines but had no effect on the attachment of non-epidermal cells. Inhibition experiments using blocking antibodies against individual integrin subunits allowed the identification of alphavbeta6 and alphavbeta1 integrins as important cellular receptors for SMOC-2. Cell attachment as well as the formation of focal adhesions could be attributed to the extracellular calcium-binding domain. The calcium-binding domain also stimulated migration, but not proliferation of keratinocyte-like HaCaT cells. We conclude that SMOC-2, like other members of the BM40/SPARC family, acts as a regulator of cell-matrix interactions.
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Affiliation(s)
- Silke Maier
- Center for Biochemistry, University of Cologne, Joseph-Stelzmann-Str. 52, D-50931 Cologne, Germany
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Wuttig D, Hartmann U. T02-P-07 Sexual behavior and its changes in long-term partnerships. Sexologies 2008. [DOI: 10.1016/s1158-1360(08)72697-5] [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]
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Beier F, Balabanov S, Amberger CC, Hartmann U, Manger K, Dietz K, Kötter I, Brummendorf TH. Telomere length analysis in monocytes and lymphocytes from patients with systemic lupus erythematosus using multi-color flow-FISH. Lupus 2008; 16:955-62. [PMID: 18042589 DOI: 10.1177/0961203307084299] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In order to analyse telomere length in subsets of human peripheral blood lymphocytes and monocytes, we modified a recently developed multicolor flow- fluorescent in situ hybridization (FISH) methodology that combines flow-FISH and antibody staining for cell surface antigens. We analysed telomere length of peripheral blood mononuclear cells in a group of 22 patients with systemic lupus erythematosus (SLE) and 20 age-matched healthy donors. We found that neither CD4+, CD8+, CD19+ cells nor CD14+ monocytes have significantly shorter telomeres compared with their healthy counterparts. On the basis of these findings, we then used monocyte telomere length as internal reference in order to control for intra-individual variability in telomere length. By using this approach, we could demonstrate significant telomere shortening in all three lymphocyte subsets (in all cases P < 0.05) compared with monocytes. However, these differences did not vary significantly between SLE patients and controls. In summary, telomere lengths in subpopulations of hematopoietic cells can be monitored in patients with SLE using multicolor flow-FISH. While confirming data by other groups on telomere length in lymphocyte subpopulations, our data argue against an increased proliferation rate of peripheral blood monocytes reflected by accelerated telomere shortening in patients with SLE.
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Affiliation(s)
- F Beier
- Division of Hematology, Oncology and Immunology, University of Tubingen, Germany
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Thon W, Kramer AEJL, Hartmann U, Stief C, Wilson B, Jonas U. Real-Time-Photogrammetrie in der Urologie. Aktuelle Urol 2008. [DOI: 10.1055/s-2008-1058281] [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: 10/21/2022]
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Dohm-Acker M, Spitzenpfeil P, Hartmann U. Auswirkung propriozeptiver Trainingsgeräte auf beteiligte Muskulatur im Einbeinstand. Sportverletz Sportschaden 2008; 22:52-7. [DOI: 10.1055/s-2007-963614] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Koblischka MR, Wei JD, Richter C, Sulzbach TH, Hartmann U. Advanced cantilevers for magnetic force microscopy and high frequency magnetic force microscopy. Scanning 2008; 30:27-34. [PMID: 18302217 DOI: 10.1002/sca.20090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In order to improve the spatial resolution achieved by magnetic force microscopy (MFM) technique and its derivatives, we employ here advanced MFM tips fabricated by means of focused ion beam (FIB) milling. The magnetic coating applied on these tips is a CoCr film of 10 nm thickness. The MFM measurements on hard disk test samples reveal the achieved high resolution, and the measurement on a garnet film demonstrates the low invasiveness. High-frequency MFM (HF-MFM) is a development of the MFM technique to observe the HF stray fields emerging from magnetic recording writer poles at their operating conditions. By means of HF-MFM, magnetic recording writer poles are characterized in the frequency range 100-1,000 MHz. Up to now, all HF-MFM experiments conducted were using standard MFM cantilevers. From the HF-MFM images obtained using the advanced MFM cantilevers, it is clearly seen that the spatial resolution is considerably improved over the images obtained using standard MFM tips. However, the 10 nm thick magnetic coating of the cantilevers is found to work properly only at frequencies of up to about 500 MHz.
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Affiliation(s)
- M R Koblischka
- Institute of Experimental Physics, Saarland University, Saarbrücken, Germany.
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Krueger THC, Schiffer B, Eikermann M, Hartmann U, Schedlowski M. Continuous neurochemical measurement of cerebrospinal fluid during the human sexual response cycle. Exp Clin Endocrinol Diabetes 2007. [DOI: 10.1055/s-2007-990413] [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: 10/21/2022]
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Niehörster G, Hartmann U, Wiesmann U, Hannich HJ. Berufliche Sozialisation von Ärzten: Spagat zwischen Anpassung und Abgrenzung. Psychother Psychosom Med Psychol 2007. [DOI: 10.1055/s-2007-970687] [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: 10/21/2022]
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Hartmann U, Kluge A, Ring C, Reuss-Borst M. [Improvement of anxiety and depression in women with breast cancer during inpatient oncological rehabilitation-- results of a prospective study]. REHABILITATION 2006; 45:88-94. [PMID: 16575714 DOI: 10.1055/s-2005-915336] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [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: 10/24/2022]
Abstract
PURPOSE Investigation of the influence of an oncological inpatient rehabilitation programme on anxiety and depression in women with breast cancer. PATIENTS AND METHOD 198 women with breast cancer, aged 25 to 75 years, filled in the Hospital Anxiety and Depression Scale (HADS) German version at the beginning and end of inpatient rehabilitation. Focus was set on the frequency of anxiety and depression. Therefore proportions with 95 % confidence intervals (CI) were built. The before-after comparison of HADS-scores was made using the signed rank test with two-sided level of significance of alpha = 5 %. In addition effect sizes were calculated. Possible relations between the scores at the beginning of rehabilitation and the patients' age or the interval since diagnosis were analysed by calculating correlation coefficients. RESULTS At the beginning of rehabilitation a state of anxiety was probable in 23.2 % (CI [17.3 %; 29.1 %] of the women and one of depression in 9.1 % (CI [5.8 %; 13.9 %]). In other words, they reached a level of >or= 11 score points on each scale. No correlation was found with the age of the patients or the time interval since diagnosis (|r| <or= 0.192). At the end of rehabilitation 67.5 % (CI [61.0 %; 74.0 %]) and 60.9 % (CI [54.1 %; 67.7 %]), respectively, of the women showed an improvement of anxiety and depression. The before-after difference was a median + 2 points (anxiety) and + 1 point (depression), resp., with a positive value representing an improvement. The changes after rehabilitation were statistically significant with p < 0.0001. The effect sizes ranged from 0.37 to 0.50. CONCLUSIONS After the end of primary therapy, women with breast cancer frequently suffer from anxiety or depressive disorders, with no correlation to the patients' age or time since diagnosis. By an inpatient oncological rehabilitation programme both anxiety and depression can be improved very successfully. Whether these results represent a long-term effect is currently being evaluated in a randomised prospective study.
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Affiliation(s)
- U Hartmann
- Reha-Klinik Am Kurpark, Fachklinik für Onkologie und Rheumatologie, Bad Kissingen
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Affiliation(s)
- U. Hartmann
- a Institut für Angewandte Physik der Universität Münster , D-4400 , Münster , F.R. Germany
| | - H. H. Mende
- a Institut für Angewandte Physik der Universität Münster , D-4400 , Münster , F.R. Germany
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Affiliation(s)
- G Ludwig
- Klinik für Urologie, Kinderurologie und urologische Onkologie, Städtische Kliniken Frankfurt/M.-Höchst, Gotenstrasse 6-8, 65929 Frankfurt/M.
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Richter K, Hartmann U, Metzenauer P, Magnussen H. Randomised trial comparing as-needed versus regular treatment with formoterol in patients with persistent asthma. Respir Med 2006; 101:467-75. [PMID: 16949264 DOI: 10.1016/j.rmed.2006.07.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2005] [Revised: 07/06/2006] [Accepted: 07/06/2006] [Indexed: 11/24/2022]
Abstract
PURPOSE The aim of this study was to demonstrate the equivalent efficacy of inhaled formoterol in asthmatic patients, either given as-needed or on a regular twice-daily schedule. METHODS Randomised, open 12-week study in patients with mild to moderate asthma not adequately controlled with inhaled glucocorticosteroids alone. Patients received inhaled formoterol as needed or on a regular schedule (2x2 puffs/day with 6 microg formoterol per puff). Patients in the twice-daily formoterol group could use salbutamol as a rescue medication. The primary endpoint was the number of patients with asthma exacerbations in each group. RESULTS Thirty-nine centres randomised 359 patients. The number of patients with asthma exacerbations showed neither a clinically relevant nor a statistically significant difference between groups: formoterol as-needed: 3.95% (7 of 177); twice daily: 3.45% (6 of 174). Patients in the formoterol as-needed group used significantly less formoterol (-1.5 puffs per day; P<0.0001). Including the saved rescue medication (up to one puff per day), total beta-2 agonist use in the formoterol as-needed group decreased by approximately 2-2.5 puffs per day. Both formoterol treatment schedules were well tolerated. Musculoskeletal pain and tremor were less frequent in the formoterol as-needed group: headaches were slightly more frequent. CONCLUSION Formoterol given as needed and without additional beta-2 agonist, and formoterol given on a regular basis twice daily, supplemented by salbutamol as a rescue medication, appeared equally effective in this clinical study. Drug consumption was markedly lower in the former group.
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Affiliation(s)
- K Richter
- Pulmonary Research Institute at Hospital Grosshansdorf, Center for Pneumology and Thoracic Surgery, Woehrendamm 80, 22927 Grosshansdorf, Germany
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