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Santiago Valtierra FX, Urriola-Muñoz P, Godoy-Sepúlveda R, Moreno RD, Reyes JG, Vallés AS, Oresti GM. Nonylphenol activates PKA and PLA2 releasing Arachidonic Acid in Rat Sertoli Cells. Reproduction 2024:REP-23-0292. [PMID: 38758690 DOI: 10.1530/rep-23-0292] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 05/17/2024] [Indexed: 05/19/2024]
Abstract
Nonylphenol (NP), an endocrine disrupting chemical, is an environmental contaminant and many notorious effects on male fertility have been reported in animal models and wild type species. Here, we evaluated the effects of NP in follicle-stimulating hormone (FSH) signal transduction pathways and lipid metabolism using an in vitro model of rat Sertoli cells (SC) primary culture. Results show that an acute (1 h) SC-exposure to NP (10 µM) increased the intra- and extracellular concentrations of free fatty acids (FFA), mainly arachidonic acid (20:4n-6). Phosphatidylinositol seemed to be the major phospholipid source of this 20:4n-6 release by activation of the protein kinase A (PKA)/cytoplasmic phospholipase A2 (cPLA2) pathway. NP also increased diacylglycerols (DAG) levels and the expression (mRNA) of cyclooxygenase 2 (Cox2) and prostaglandin E2 (PGE2) levels. Noteworthy, accumulation of lipid droplets took place after 24 h NP-exposition, which was prevented by both, a PKA and a PLA2 inhibitors. Like FSH, NP triggers the release of 20:4n-6 that is substrate for PGE2 synthesis via PKA/PLA2 activation. In addition, NP induces the formation of DAG that could be required as a cofactor of the PKC-mediated activation of the Cox2 inflammatory pathway. Our findings suggest that NP alters lipid homeostasis in SC by inducing the activation of pro-inflammatory pathways that may trigger adverse effects in testis physiology over time. Concomitantly, the SC enhances the acylation of surplus free fatty acids (including 20:4n-6) in neutral lipids as a protective mechanism to shield itself from lipotoxicity and pro-inflammatory signals.
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Affiliation(s)
- Florencia X Santiago Valtierra
- F Santiago Valtierra, INIBIBB, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina
| | - Paulina Urriola-Muñoz
- P Urriola-Muñoz, Department of Physiology, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Rodrigo Godoy-Sepúlveda
- R Godoy-Sepúlveda, Dpto. Química, Pontificia Universidad Católica de Valparaíso, Valparaiso, Chile
| | - Ricardo D Moreno
- R Moreno, Departamento de Ciencias Fisiologicas, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Juan G Reyes
- J Reyes, Dpto. Química, Pontificia Universidad Católica de Valparaíso, Valparaiso, Chile
| | - Ana S Vallés
- A Vallés, INIBIBB, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina
| | - Gerardo M Oresti
- G Oresti, INIBIBB, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahia Blanca, Argentina
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Santiago Valtierra FX, Aveldaño MI, Oresti GM. Differentiation-linked changes in the biosynthesis and turnover of sphingomyelins in rat male germ cells: Genes involved and effects of testosterone. J Biol Chem 2023; 299:103058. [PMID: 36841478 PMCID: PMC10074206 DOI: 10.1016/j.jbc.2023.103058] [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: 12/18/2021] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 02/26/2023] Open
Abstract
In rodents, sphingomyelins (SMs) species with very-long-chain polyunsaturated fatty acid (VLCPUFA) are required for normal spermatogenesis. Data on the expression of enzymes with roles in their biosynthesis and turnover during germ cell differentiation and on possible effects on such expression of testosterone (Tes), known to promote this biological process, were lacking. Here we quantified, in isolated pachytene spermatocytes (PtS), round spermatids (RS), and later spermatids (LS), the mRNA levels from genes encoding ceramide (Cer), glucosylceramide (GlcCer), and SM synthases (Cers3, Gcs, Sms1, and Sms2) and sphingomyelinases (aSmase, nSmase) and assessed products of their activity in cells in culture using nitrobenzoxadiazole (NBD)-labeled substrates and [3H]palmitate as precursor. Transcript levels from Cers3 and Gcs were maximal in PtS. While mRNA levels from Sms1 increased with differentiation in the direction PtS→RS→LS, those from Sms2 increased between PtS and RS but decreased in LS. In turn, the nSmase transcript increased in the PtS→RS→LS order. During incubations with NBD-Cer, spermatocytes produced more GlcCer and SM than did spermatids. In total germ cells cultured for up to 25 h with NBD-SM, not only abundant NBD-Cer but also NBD-GlcCer were formed, demonstrating SM→Cer turnover and Cer recycling. After 20 h with [3H]palmitate, PtS produced [3H]SM and RS formed [3H]SM and [3H]Cer, all containing VLCPUFA, and Tes increased their labeling. In total germ cells, Tes augmented in 5 h the expression of genes with roles in VLCPUFA synthesis, decreased the mRNA from Sms2, and increased that from nSmase. Thus, Tes enhanced or accelerated the metabolic changes occurring to VLCPUFA-SM during germ cell differentiation.
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Affiliation(s)
- Florencia X Santiago Valtierra
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
| | - Marta I Aveldaño
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
| | - Gerardo M Oresti
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina.
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Lupi GA, Santiago Valtierra FX, Cabrera G, Spinelli R, Siano ÁS, González V, Osuna A, Oresti GM, Marcipar I. Development of low-cost cage-like particles to formulate veterinary vaccines. Vet Immunol Immunopathol 2022; 251:110460. [PMID: 35901545 DOI: 10.1016/j.vetimm.2022.110460] [Citation(s) in RCA: 3] [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: 02/03/2022] [Revised: 07/08/2022] [Accepted: 07/10/2022] [Indexed: 10/17/2022]
Abstract
Low-cost adjuvants are urgently needed for the development of veterinary vaccines able to trigger strong immune responses. In this work, we describe a method to obtain a low-cost cage-like particles (ISCOMATRIX-like) adjuvant useful to formulate veterinary vaccines candidates. The main components to form the particles are lipids and saponins, which were obtained from egg yolk by ethanolic extraction and by dialyzing a non-refined saponins extract, respectively. Lipids were fully characterized by thin layer chromatography (TLC) and gas-chromatography (GC) and enzymatic methods, and saponins were characterized by TLC, HPLC and MALDI-TOF. Cage-like particles were prepared with these components or with commercial inputs. Both particles and the traditional Alum used in veterinary vaccines were compared by immunizing mice with Ovalbumin (OVA) formulated with these adjuvants and assessing IgG1, IgG2a anti OVA antibodies and specific Delayed-type Hypersensitivity (DTH). In the yolk extract, a mixture of phospholipids, cholesterol and minor components of the extract (e.g. lyso-phospholipids) with suitable proportions to generate cage-like particles was obtained. Also, semi-purified saponins with similar features to those of the QuilA® were obtained. Cage-like particles prepared with these components have 40-50 nm and triggers similar levels of Anti-OVA IgG1 and DTH than with commercial inputs but higher specific-IgG2a. Both adjuvants largely increased the levels of IgG1, IgG2a and DTH in relation to the formulation with Alum. The methods described to extract lipids from egg yolk and saponins from non-refined extract allowed us to obtain an inexpensive and highly effective adjuvant.
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Affiliation(s)
- Giuliana A Lupi
- Laboratorio de Tecnología Inmunológica (Facultad de Bioquímica y Cs Biológicas Universidad Nacional del Litoral) - Santa Fe - Argentina - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bs.As., Argentina
| | - Florencia X Santiago Valtierra
- Departamento de Biología, Bioquímica y Farmacia (DBByF), Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina; Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina, Bioquímica y Farmacia (DBByF), Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
| | - Gabriel Cabrera
- Laboratorio de Tecnología Inmunológica (Facultad de Bioquímica y Cs Biológicas Universidad Nacional del Litoral) - Santa Fe - Argentina - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bs.As., Argentina
| | - Roque Spinelli
- Laboratorio de Péptidos Bioactivos - Departamento de Química Orgánica (Facultad de Bioquímica y Cs Biológicas Universidad Nacional del Litoral) - Santa Fe - Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bs.As., Argentina
| | - Álvaro S Siano
- Laboratorio de Péptidos Bioactivos - Departamento de Química Orgánica (Facultad de Bioquímica y Cs Biológicas Universidad Nacional del Litoral) - Santa Fe - Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bs.As., Argentina
| | - Verónica González
- Grupo de Polímeros y Reactores de Polimerización, INTEC (Universidad Nacional del Litoral, CONICET), Santa Fe, Argentina
| | - Antonio Osuna
- Grupo de Investigación en Bioquímica Molecular y Parasitología, Departamento de Parasitología, Instituto de Biotecnología, Facultad de Ciencias, Universidad de Granada, Granada, Spain
| | - Gerardo M Oresti
- Departamento de Biología, Bioquímica y Farmacia (DBByF), Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina; Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina, Bioquímica y Farmacia (DBByF), Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
| | - Iván Marcipar
- Laboratorio de Tecnología Inmunológica (Facultad de Bioquímica y Cs Biológicas Universidad Nacional del Litoral) - Santa Fe - Argentina - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bs.As., Argentina.
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Vera MS, Simón MV, Prado Spalm FH, Ayala-Peña VB, German OL, Politi LE, Santiago Valtierra FX, Rotstein NP. Ceramide-1-phosphate promotes the migration of retina Müller glial cells. Exp Eye Res 2020; 202:108359. [PMID: 33197453 DOI: 10.1016/j.exer.2020.108359] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 09/08/2020] [Revised: 10/30/2020] [Accepted: 11/07/2020] [Indexed: 12/13/2022]
Abstract
Müller glial cells, the major glial cell type in the retina, are activated by most retina injuries, leading to an increased proliferation and migration that contributes to visual dysfunction. The molecular cues involved in these processes are still ill defined. We demonstrated that sphingosine-1-phosphate (S1P), a bioactive sphingolipid, promotes glial migration. We now investigated whether ceramide-1-phosphate (C1P), also a bioactive sphingolipid, was involved in Müller glial cell migration. We evaluated cell migration in primary Müller glial cultures, prepared from newborn rat retinas, by the scratch wound assay. Addition of either 10 μM C8-ceramide-1-phosphate (C8-C1P) or 5 μM C16-C1P (a long chain, natural C1P) stimulated glial migration. Inhibiting PI3K almost completely blocked C8-C1P-elicited migration whereas inhibition of ERK1-2/MAPK pathway diminished it and p38MAPK inhibition did not affect it. Pre-treatment with a cytoplasmic phospholipase A2 (cPLA2) inhibitor markedly reduced C8-C1P-induced migration. Inhibiting ceramide kinase (CerK), the enzyme catalyzing C1P synthesis, partially decreased glial migration. Combined addition of S1P and C8-C1P promoted glial migration to the same extent as when they were added separately, suggesting they converge on their downstream signaling to stimulate Müller glia migration. These results suggest that C1P addition stimulated migration of glial Müller cells, promoting the activation of cPLA2, and the PI3K and ERK/MAPK pathways. They also suggest that CerK-dependent C1P synthesis was one of the factors contributing to glial migration, thus uncovering a novel role for C1P in controlling glial motility.
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Affiliation(s)
- Marcela S Vera
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Dept. of Biology, Biochemistry and Pharmacy, Universidad Nacional del Sur (UNS) and National Research Council of Argentina (CONICET), Bahía Blanca, Buenos Aires, Argentina
| | - M Victoria Simón
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Dept. of Biology, Biochemistry and Pharmacy, Universidad Nacional del Sur (UNS) and National Research Council of Argentina (CONICET), Bahía Blanca, Buenos Aires, Argentina
| | - Facundo H Prado Spalm
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Dept. of Biology, Biochemistry and Pharmacy, Universidad Nacional del Sur (UNS) and National Research Council of Argentina (CONICET), Bahía Blanca, Buenos Aires, Argentina
| | - Victoria B Ayala-Peña
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Dept. of Biology, Biochemistry and Pharmacy, Universidad Nacional del Sur (UNS) and National Research Council of Argentina (CONICET), Bahía Blanca, Buenos Aires, Argentina
| | - O Lorena German
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Dept. of Biology, Biochemistry and Pharmacy, Universidad Nacional del Sur (UNS) and National Research Council of Argentina (CONICET), Bahía Blanca, Buenos Aires, Argentina
| | - Luis E Politi
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Dept. of Biology, Biochemistry and Pharmacy, Universidad Nacional del Sur (UNS) and National Research Council of Argentina (CONICET), Bahía Blanca, Buenos Aires, Argentina
| | - Florencia X Santiago Valtierra
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Dept. of Biology, Biochemistry and Pharmacy, Universidad Nacional del Sur (UNS) and National Research Council of Argentina (CONICET), Bahía Blanca, Buenos Aires, Argentina
| | - Nora P Rotstein
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Dept. of Biology, Biochemistry and Pharmacy, Universidad Nacional del Sur (UNS) and National Research Council of Argentina (CONICET), Bahía Blanca, Buenos Aires, Argentina.
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Santiago Valtierra FX, Peñalva DA, Luquez JM, Furland NE, Vásquez C, Reyes JG, Aveldaño MI, Oresti GM. Elovl4 and Fa2h expression during rat spermatogenesis: a link to the very-long-chain PUFAs typical of germ cell sphingolipids. J Lipid Res 2018; 59:1175-1189. [PMID: 29724783 DOI: 10.1194/jlr.m081885] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 04/27/2018] [Indexed: 12/14/2022] Open
Abstract
The sphingolipids (SLs) of rodent spermatogenic cells (spermatocytes, spermatids) and spermatozoa contain nonhydroxylated and 2-hydroxylated versions of very-long-chain (C26-C32) PUFAs (n-V and h-V, respectively) not present in Sertoli cells (SCs). Here, we investigated the expression of selected fatty acid elongases [elongation of very-long-chain fatty acid protein (Elovl)], with a focus on Elovl4, and a fatty acid 2-hydroxylase (Fa2h) in rat testes with postnatal development and germ cell differentiation. Along with Elovl5 and Elovl2, Elovl4 was actively transcribed in the adult testis. Elovl4 mRNA levels were high in immature testes and SCs, though the protein was absent. The Elovl4 protein was a germ cell product. All cells under study elongated [3H]arachidonate to tetraenoic and pentaenoic C24 PUFA, but only germ cells produced C26-C32 PUFAs. Spermatocytes displayed the highest Elovl4 protein levels and enzymatic activity. Fa2h mRNA was produced exclusively in germ cells, mostly round spermatids. As a protein, Fa2h was mainly concentrated in late spermatids, in the step of spermiogenesis in which they elongate and their heads change shape. The expression of Elovl4 and Fa2h thus correlate with the abundance of n-Vs and h-Vs in the SLs of rat spermatocytes and spermatids, respectively.
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Affiliation(s)
- Florencia X Santiago Valtierra
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
| | - Daniel A Peñalva
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
| | - Jessica M Luquez
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
| | - Natalia E Furland
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
| | - Claudia Vásquez
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Juan G Reyes
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Marta I Aveldaño
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
| | - Gerardo M Oresti
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), Bahía Blanca, Argentina
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Santiago Valtierra FX, Mateos MV, Aveldaño MI, Oresti GM. Sphingomyelins and ceramides with VLCPUFAs are excluded from low-density raft-like domains in differentiating spermatogenic cells. J Lipid Res 2017; 58:529-542. [PMID: 28082410 DOI: 10.1194/jlr.m072595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 12/25/2016] [Indexed: 11/20/2022] Open
Abstract
Rat spermatogenic cells contain sphingomyelins (SMs) and ceramides (Cers) with very long-chain PUFAs (VLCPUFAs) in nonhydroxylated (n-V) and 2-hydroxylated (h-V) forms. How these atypical species distribute among membrane fractions during differentiation was investigated here using a detergent-free procedure to isolate a small light raft-like low-density fraction and a large heavy fraction, mostly derived from the plasma membrane of spermatocytes, round spermatids, and late spermatids. The light fraction contained cholesterol, glycerophospholipids (GPLs), and SM with the same saturated fatty acids in all three stages. In the heavy fraction, as PUFA increased in the GPL and VLCPUFA in SM from spermatocytes to spermatids, the concentration of cholesterol was also augmented. The heavy fraction had mostly n-V SM in spermatocytes, but accumulated h-V SM and h-V Cer in spermatids. A fraction containing intracellular membranes had less SM and more Cer than the latter, but in both fractions SM and Cer species with h-V increased over species with n-V with differentiation. This accretion of h-V was consistent with the differentiation-dependent expression of fatty acid 2-hydroxylase (Fa2h), as it increased significantly from spermatocytes to spermatids. The non-raft region of the plasma membrane is thus the main target of the dynamic lipid synthesis and remodeling that is involved in germ cell differentiation.
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Affiliation(s)
- Florencia X Santiago Valtierra
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), 8000 Bahía Blanca, Argentina
| | - Melina V Mateos
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), 8000 Bahía Blanca, Argentina
| | - Marta I Aveldaño
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), 8000 Bahía Blanca, Argentina
| | - Gerardo M Oresti
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) y Universidad Nacional del Sur (UNS), 8000 Bahía Blanca, Argentina
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