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Barutta F, Bellini S, Kimura S, Hase K, Corbetta B, Corbelli A, Fiordaliso F, Bruno S, Biancone L, Barreca A, Papotti M, Hirsh E, Martini M, Gambino R, Durazzo M, Ohno H, Gruden G. Protective effect of the tunneling nanotube-TNFAIP2/M-sec system on podocyte autophagy in diabetic nephropathy. Autophagy 2023; 19:505-524. [PMID: 35659195 PMCID: PMC9851239 DOI: 10.1080/15548627.2022.2080382] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [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] [Indexed: 01/22/2023] Open
Abstract
Podocyte injury leading to albuminuria is a characteristic feature of diabetic nephropathy (DN). Hyperglycemia and advanced glycation end products (AGEs) are major determinants of DN. However, the underlying mechanisms of podocyte injury remain poorly understood. The cytosolic protein TNFAIP2/M-Sec is required for tunneling nanotubes (TNTs) formation, which are membrane channels that transiently connect cells, allowing organelle transfer. Podocytes express TNFAIP2 and form TNTs, but the potential relevance of the TNFAIP2-TNT system in DN is unknown. We studied TNFAIP2 expression in both human and experimental DN and the renal effect of tnfaip2 deletion in streptozotocin-induced DN. Moreover, we explored the role of the TNFAIP2-TNT system in podocytes exposed to diabetes-related insults. TNFAIP2 was overexpressed by podocytes in both human and experimental DN and exposre of podocytes to high glucose and AGEs induced the TNFAIP2-TNT system. In diabetic mice, tnfaip2 deletion exacerbated albuminuria, renal function loss, podocyte injury, and mesangial expansion. Moreover, blockade of the autophagic flux due to lysosomal dysfunction was observed in diabetes-injured podocytes both in vitro and in vivo and exacerbated by tnfaip2 deletion. TNTs allowed autophagosome and lysosome exchange between podocytes, thereby ameliorating AGE-induced lysosomal dysfunction and apoptosis. This protective effect was abolished by tnfaip2 deletion, TNT inhibition, and donor cell lysosome damage. By contrast, Tnfaip2 overexpression enhanced TNT-mediated transfer and prevented AGE-induced autophagy and lysosome dysfunction and apoptosis. In conclusion, TNFAIP2 plays an important protective role in podocytes in the context of DN by allowing TNT-mediated autophagosome and lysosome exchange and may represent a novel druggable target.Abbreviations: AGEs: advanced glycation end products; AKT1: AKT serine/threonine kinase 1; AO: acridine orange; ALs: autolysosomes; APs: autophagosomes; BM: bone marrow; BSA: bovine serum albumin; CTSD: cathepsin D; DIC: differential interference contrast; DN: diabetic nephropathy; FSGS: focal segmental glomerulosclerosis; HG: high glucose; KO: knockout; LAMP1: lysosomal-associated membrane protein 1; LMP: lysosomal membrane permeabilization; MAP1LC3/LC3: microtubule-associated protein 1 light chain 3; PI3K: phosphoinositide 3-kinase; STZ: streptozotocin; TNF: tumor necrosis factor; TNFAIP2: tumor necrosis factor, alpha-induced protein 2; TNTs: tunneling nanotubes; WT: wild type.
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Affiliation(s)
- F. Barutta
- Department of Medical Sciences, University of Turin, Turin, Italy,CONTACT F. Barutta Department of Medical Sciences, Corso Dogliotti 1410126, Turin, Italy
| | - S. Bellini
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - S. Kimura
- Division of Biochemistry, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - K. Hase
- Division of Biochemistry, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - B. Corbetta
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - A. Corbelli
- Unit of Bioimaging, Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - F. Fiordaliso
- Unit of Bioimaging, Department of Molecular Biochemistry and Pharmacology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - S. Bruno
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - L. Biancone
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - A. Barreca
- Division of Pathology, Città della Salute e della Scienza Hospital, Turin, Italy
| | - M.G. Papotti
- Department of Oncology, University of Turin, Turin, Italy
| | - E. Hirsh
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Turin, Italy
| | - M. Martini
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Turin, Italy
| | - R. Gambino
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - M. Durazzo
- Department of Medical Sciences, University of Turin, Turin, Italy
| | - H. Ohno
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - G. Gruden
- Department of Medical Sciences, University of Turin, Turin, Italy
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Fragaszy D, Johnson-Pynn J, Hirsh E, Brakke K. Strategic navigation of two-dimensional alley mazes: comparing capuchin monkeys and chimpanzees. Anim Cogn 2003; 6:149-60. [PMID: 12955584 DOI: 10.1007/s10071-002-0137-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2001] [Revised: 05/16/2002] [Accepted: 06/06/2002] [Indexed: 11/21/2022]
Abstract
Planning is an important component of cognition that contributes, for example, to efficient movement through space. In the current study we presented novel two-dimensional alley mazes to four chimpanzees and three capuchin monkeys to identify the nature and efficiency of planning in relation to varying task parameters. All the subjects solved more mazes without error than expected by chance, providing compelling evidence that both species planned their choices in some manner. The probability of making a correct choice on mazes designed to be more demanding and presented later in the testing series was higher than on earlier, simpler mazes (chimpanzees), or unchanged (capuchin monkeys), suggesting microdevelopment of strategic choice. Structural properties of the mazes affected both species' choices. Capuchin monkeys were less likely than chimpanzees to take a correct path that initially led away from the goal but that eventually led to the goal. Chimpanzees were more likely to make an error by passing a correct path than by turning onto a wrong path. Chimpanzees and one capuchin made more errors on choices farther in sequence from the goal. Each species corrected errors before running into the end of an alley in approximately 40% of cases. Together, these findings suggest nascent planning abilities in each species, and the prospect for significant development of strategic planning capabilities on tasks presenting multiple simultaneous or sequential spatial relations. The computerized maze paradigm appears well suited to investigate movement planning and spatial perception in human and nonhuman primates alike.
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Affiliation(s)
- D Fragaszy
- Department of Psychology, University of Georgia, Athens, GA 30602, USA.
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Echaniz-Laguna A, de Saint-Martin A, Lafontaine AL, Tasch E, Thomas P, Hirsh E, Marescaux C, Andermann F. Bilateral focal polymicrogyria in Ehlers-Danlos syndrome. Arch Neurol 2000; 57:123-7. [PMID: 10634459 DOI: 10.1001/archneur.57.1.123] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND Ehlers-Danlos syndrome (EDS) is a heterogeneous group of generalized connective tissue disorders that has been described in association with epilepsy and cerebral cortical dysplasia, mostly gray matter heterotopias, in 3 reports. However, to our knowledge, association of EDS with another type of cortical cerebral dysplasia, bilateral focal polymicrogyria, has never previously been described. SETTING Two research-oriented hospitals. PATIENTS We describe 2 patients with EDS and bilateral polymicrogyria. The first, a 29-year-old black man, presented with EDS of unspecified type, seizures, and bilateral frontocentral and frontoposterior polymicrogyria with hypoplasia of the inferior part of the cerebellar vermis. The second, a 20-year-old woman, had type III EDS, seizures and congenital bilateral perisylvian syndrome with polymicrogyria. CONCLUSIONS The association of bilateral focal polymicrogyria and EDS in these 2 patients suggests that extracellular matrix proteins implicated in the pathogenesis of EDS, such as collagen and tenascin, may play an important role in cerebral cortical formation and organization. In a clinical setting, the association of EDS with these cortical structural lesions has implications for diagnosis and management.
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Affiliation(s)
- A Echaniz-Laguna
- Unité d'Explorations Fonctionnelles des Epilepsies, Clinique Neurologique, Hôpital Civil, Strasbourg, France
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Elizur Y, Hirsh E. Psychosocial adjustment and mental health two months after coronary artery bypass surgery: a multisystemic analysis of patients' resources. J Behav Med 1999; 22:157-77. [PMID: 10374141 DOI: 10.1023/a:1018735516080] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [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: 11/12/2022]
Abstract
Resources related to cardiac patients' sense of self, marital quality, and social support were assessed before their first planned bypass surgery to determine their relationship with later psychosocial functioning. Six female and 45 male cardiac patients, 45-70 years old, answered self-report instruments 1 week before and 8-10 weeks after the operation. Regression analyses indicated that only the marital relationship variables made independent contributions to the prediction of functioning. Since self-report measures of resources can be affected by negative affectivity, a second level of analysis predicted change scores while controlling for initial levels of functioning. Marital flexibility and support were found to make an independent contribution to recovery. These results highlight the importance of marital resources in coping with the acute phase following bypass surgery and have implications for prevention and clinical practice.
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Affiliation(s)
- Y Elizur
- Department of Psychology, Hebrew University of Jerusalem, Israel.
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Abstract
Acute calcific quadriceps tendinitis can be the cause of acute periarthritis of the knee. Physical examination can detect cellulitis and a tender tendon sheath. Lateral roentgenograms of soft tissues show thickening of the tendon and sometimes small flecks of amorphous calcification within the body of the tendon near the attachment. Although hyperostosis of the patella near the tendon attachment is often present, it is well defined ossification and not associated with the acute symptoms. The amorphous calcium deposits quickly disappear during the acute tendinitis and are not detected on follow-up radiologic examination.
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