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Bodart G, Goffinet L, Morrhaye G, Farhat K, de Saint-Hubert M, Debacq-Chainiaux F, Swine C, Geenen V, Martens HJ. Somatotrope GHRH/GH/IGF-1 axis at the crossroads between immunosenescence and frailty. Ann N Y Acad Sci 2015; 1351:61-7. [PMID: 26284958 DOI: 10.1111/nyas.12857] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Immunosenescence, characterized by complex modifications of immunity with age, could be related to frailty syndrome in elderly individuals, leading to an inadequate response to minimal aggression. Functional decline (i.e., the loss of ability to perform activities of daily living) is related to frailty and decreased physiological reserves and is a frequent outcome of hospitalization in older patients. Links between immunosenescence and frailty have been explored and 20 immunological parameters, including insulin-like growth factor-1 (IGF-1), thymopoeisis, and telomere length, were shown to be affected in elderly patients with functional decline. A strong relationship between IGF-1 and thymic ouput was evidenced. IGF-1, a mediator of growth hormone (GH), was subsequently shown to induce interleukin-7 secretion in cultured primary human thymic epithelial cells. We are exploring the stress hypothesis in which an acute stressor is used as the discriminator of frailty susceptibility. GH can counteract the deleterious immunosuppressive effects of stress-induced steroids. Under nonstress conditions, the immunosenescent system preserves physiological responses, while under stress conditions, the combination of immunosenescence and a defect in the somatotrope axis might lead to functional decline.
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Affiliation(s)
| | | | | | - Khalil Farhat
- GIGA Research Institute, University of Liège, Liège, Belgium
| | - Marie de Saint-Hubert
- Department of Geriatrics, University Hospital of Mont-Godinne, NARILIS-Namur Research Institute for Life Sciences, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Florence Debacq-Chainiaux
- Unit of Research on Cellular Biology, NARILIS-Namur Research Institute for Life Sciences, University of Namur (FUNDP), Namur, Belgium
| | - Christian Swine
- Department of Geriatrics, University Hospital of Mont-Godinne, NARILIS-Namur Research Institute for Life Sciences, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Vincent Geenen
- GIGA Research Institute, University of Liège, Liège, Belgium
| | - Henri J Martens
- GIGA Research Institute, University of Liège, Liège, Belgium
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Bellavista E, Martucci M, Vasuri F, Santoro A, Mishto M, Kloss A, Capizzi E, Degiovanni A, Lanzarini C, Remondini D, Dazzi A, Pellegrini S, Cescon M, Capri M, Salvioli S, D'Errico-Grigioni A, Dahlmann B, Grazi GL, Franceschi C. Lifelong maintenance of composition, function and cellular/subcellular distribution of proteasomes in human liver. Mech Ageing Dev 2014; 141-142:26-34. [PMID: 25265087 DOI: 10.1016/j.mad.2014.09.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 09/18/2014] [Accepted: 09/19/2014] [Indexed: 11/29/2022]
Abstract
Owing to organ shortage, livers from old donors are increasingly used for transplantation. The function and duration of such transplanted livers are apparently comparable to those from young donors, suggesting that, despite some morphological and structural age-related changes, no major functional changes do occur in liver with age. We tested this hypothesis by performing a comprehensive study on proteasomes, major cell organelles responsible for proteostasis, in liver biopsies from heart-beating donors. Oxidized and poly-ubiquitin conjugated proteins did not accumulate with age and the three major proteasome proteolytic activities were similar in livers from young and old donors. Analysis of proteasomes composition showed an age-related increased of β5i/α4 ratio, suggesting a shift toward proteasomes containing inducible subunits and a decreased content of PA28α subunit, mainly in the cytosol of hepatocytes. Thus our data suggest that, proteasomes activity is well preserved in livers from aged donors, concomitantly with subtle changes in proteasome subunit composition which might reflect the occurrence of a functional remodelling to maintain an efficient proteostasis. Gender differences are emerging and they deserve further investigations owing to the different aging trajectories between men and women. Finally, our data support the safe use of livers from old donors for transplantation.
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Affiliation(s)
- Elena Bellavista
- Interdepartmental Centre "L. Galvani" for Integrated Studies on Biophysics, Bioinformatics and Biocomplexity (CIG), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy; Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy.
| | - Morena Martucci
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy.
| | - Francesco Vasuri
- "F. Addarii" Institute of Oncology and Transplant Pathology at Department of Experimental, Diagnostic and Specialty Medicine (DIMES), S. Orsola-Malpighi Hospital, 40138 Bologna, Italy.
| | - Aurelia Santoro
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy.
| | - Michele Mishto
- Institute of Biochemistry, Charité Universitaetsmedizin Berlin, 10117 Berlin, Germany; Centro Interdipartimentale di Ricerca sul Cancro "Giorgio Prodi" (CIRC), University of Bologna, 40126 Bologna, Italy.
| | - Alexander Kloss
- Institute of Biochemistry, Charité Universitaetsmedizin Berlin, 10117 Berlin, Germany.
| | - Elisa Capizzi
- "F. Addarii" Institute of Oncology and Transplant Pathology at Department of Experimental, Diagnostic and Specialty Medicine (DIMES), S. Orsola-Malpighi Hospital, 40138 Bologna, Italy.
| | - Alessio Degiovanni
- "F. Addarii" Institute of Oncology and Transplant Pathology at Department of Experimental, Diagnostic and Specialty Medicine (DIMES), S. Orsola-Malpighi Hospital, 40138 Bologna, Italy.
| | - Catia Lanzarini
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy.
| | - Daniel Remondini
- Interdepartmental Centre "L. Galvani" for Integrated Studies on Biophysics, Bioinformatics and Biocomplexity (CIG), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy; Department of Physics and Astronomy (DIFA) and INFN Sez. Bologna, Alma Mater Studiorum, University of Bologna, 40127 Bologna, Italy.
| | - Alessandro Dazzi
- Department of General Surgery and Organ Transplantation, S. Orsola-Malpighi Hospital, 40138 Bologna, Italy.
| | - Sara Pellegrini
- Department of General Surgery and Organ Transplantation, S. Orsola-Malpighi Hospital, 40138 Bologna, Italy.
| | - Matteo Cescon
- Department of General Surgery and Organ Transplantation, S. Orsola-Malpighi Hospital, 40138 Bologna, Italy.
| | - Miriam Capri
- Interdepartmental Centre "L. Galvani" for Integrated Studies on Biophysics, Bioinformatics and Biocomplexity (CIG), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy; Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy.
| | - Stefano Salvioli
- Interdepartmental Centre "L. Galvani" for Integrated Studies on Biophysics, Bioinformatics and Biocomplexity (CIG), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy; Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy.
| | - Antonia D'Errico-Grigioni
- "F. Addarii" Institute of Oncology and Transplant Pathology at Department of Experimental, Diagnostic and Specialty Medicine (DIMES), S. Orsola-Malpighi Hospital, 40138 Bologna, Italy.
| | - Burkhardt Dahlmann
- Institute of Biochemistry, Charité Universitaetsmedizin Berlin, 10117 Berlin, Germany.
| | | | - Claudio Franceschi
- Interdepartmental Centre "L. Galvani" for Integrated Studies on Biophysics, Bioinformatics and Biocomplexity (CIG), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy; Department of Experimental, Diagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy; IRCCS Institute of Neurological Sciences, 40139 Bologna, Italy; National Research Council of Italy, CNR, Institute for Organic Synthesis and Photoreactivity (ISOF), 40129 Bologna, Italy; National Research Council of Italy, CNR, Institute of Molecular Genetics, Unit of Bologna IOR, 40136 Italy.
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