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Impact of Selected Small-Molecule Kinase Inhibitors on Lipid Membranes. Pharmaceuticals (Basel) 2021; 14:ph14080746. [PMID: 34451842 PMCID: PMC8401620 DOI: 10.3390/ph14080746] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 07/26/2021] [Accepted: 07/26/2021] [Indexed: 01/20/2023] Open
Abstract
Small-molecule protein kinase inhibitors are used for the treatment of various diseases. Although their effect(s) on the respective kinase are generally quite well understood, surprisingly, their interaction with membranes is only barely investigated; even though these drugs necessarily come into contact with the plasma and intracellular membranes. Using biophysical methods such as NMR, ESR, and fluorescence spectroscopy in combination with lipid vesicles, we studied the membrane interaction of the kinase inhibitors sunitinib, erlotinib, idelalisib, and lenvatinib; these drugs are characterized by medium log p values, a parameter reflecting the overall hydrophobicity of the molecules, which is one important parameter to predict the interaction with lipid membranes. While all four molecules tend to embed in a similar region of the lipid membrane, their presence has different impacts on membrane structure and dynamics. Most notably, sunitinib, exhibiting the lowest log p value of the four inhibitors, effectively influences membrane integrity, while the others do not. This shows that the estimation of the effect of drug molecules on lipid membranes can be rather complex. In this context, experimental studies on lipid membranes are necessary to (i) identify drugs that may disturb membranes and (ii) characterize drug-membrane interactions on a molecular level. Such knowledge is important for understanding the efficacy and potential side effects of respective drugs.
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Moesgaard L, Petersen D, Szomek M, Reinholdt P, Winkler MBL, Frain KM, Müller P, Pedersen BP, Kongsted J, Wüstner D. Mechanistic Insight into Lipid Binding to Yeast Niemann Pick Type C2 Protein. Biochemistry 2020; 59:4407-4420. [PMID: 33141558 DOI: 10.1021/acs.biochem.0c00574] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Niemann Pick type C2 (NPC2) is a small sterol binding protein in the lumen of late endosomes and lysosomes. We showed recently that the yeast homologue of NPC2 together with its binding partner NCR1 mediates integration of ergosterol, the main sterol in yeast, into the vacuolar membrane. Here, we study the binding specificity and the molecular details of lipid binding to yeast NPC2. We find that NPC2 binds fluorescence- and spin-labeled analogues of phosphatidylcholine (PC), phosphatidylserine, phosphatidylinositol (PI), and sphingomyelin. Spectroscopic experiments show that NPC2 binds lipid monomers in solution but can also interact with lipid analogues in membranes. We further identify ergosterol, PC, and PI as endogenous NPC2 ligands. Using molecular dynamics simulations, we show that NPC2's binding pocket can adapt to the ligand shape and closes around bound ergosterol. Hydrophobic interactions stabilize the binding of ergosterol, but binding of phospholipids is additionally stabilized by electrostatic interactions at the mouth of the binding site. Our work identifies key residues that are important in stabilizing the binding of a phospholipid to yeast NPC2, thereby rationalizing future mutagenesis studies. Our results suggest that yeast NPC2 functions as a general "lipid solubilizer" and binds a variety of amphiphilic lipid ligands, possibly to prevent lipid micelle formation inside the vacuole.
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Affiliation(s)
- Laust Moesgaard
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Daniel Petersen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Maria Szomek
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Peter Reinholdt
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Mikael B L Winkler
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10, Aarhus C 8000, Denmark
| | - Kelly May Frain
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10, Aarhus C 8000, Denmark
| | - Peter Müller
- Department of Biology, Humboldt University Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Bjørn Panyella Pedersen
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10, Aarhus C 8000, Denmark
| | - Jacob Kongsted
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Daniel Wüstner
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
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Haralampiev I, Alonso de Armiño DJ, Luck M, Fischer M, Abel T, Huster D, Di Lella S, Scheidt HA, Müller P. Interaction of the small-molecule kinase inhibitors tofacitinib and lapatinib with membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183414. [PMID: 32710852 DOI: 10.1016/j.bbamem.2020.183414] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 07/09/2020] [Accepted: 07/12/2020] [Indexed: 12/31/2022]
Abstract
Lapatinib and tofacitinib are small-molecule kinase inhibitors approved for the treatment of advanced or metastatic breast cancer and rheumatoid arthritis, respectively. So far, the mechanisms which are responsible for their activities are not entirely understood. Here, we focus on the interaction of these drug molecules with phospholipid membranes, which has not yet been investigated before in molecular detail. Owing to their lipophilic characteristics, quantitatively reflected by large differences of the partition equilibrium between water and octanol phases (expressed by logP values), rather drastic differences in the membrane interaction of both molecules have to be expected. Applying experimental (nuclear magnetic resonance, fluorescence and ESR spectroscopy) and theoretical (molecular dynamics simulations) approaches, we found that lapatinib and tofacitinib bind to lipid membranes and insert into the lipid-water interface of the bilayer. For lapatinib, a deeper embedding into the membrane bilayer was observed than for tofacitinib implying different impacts of the molecules on the bilayer structure. While for tofacitinib, no influence to the membrane structure was found, lapatinib causes a membrane disturbance, as concluded from an increased permeability of the membrane for polar molecules. These data may contribute to a better understanding of the cellular uptake mechanism(s) and the side effects of the drugs.
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Affiliation(s)
- Ivan Haralampiev
- Humboldt-Universität zu Berlin, Department of Biology, Invalidenstr. 42, D-10115 Berlin, Germany
| | - Diego Javier Alonso de Armiño
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina
| | - Meike Luck
- Humboldt-Universität zu Berlin, Department of Biology, Invalidenstr. 42, D-10115 Berlin, Germany
| | - Markus Fischer
- Leipzig University, Institute for Medical Physics and Biophysics, Härtelstr. 16-18, D-04107 Leipzig, Germany
| | - Tobias Abel
- Leipzig University, Institute for Medical Physics and Biophysics, Härtelstr. 16-18, D-04107 Leipzig, Germany
| | - Daniel Huster
- Leipzig University, Institute for Medical Physics and Biophysics, Härtelstr. 16-18, D-04107 Leipzig, Germany
| | - Santiago Di Lella
- Instituto de Química Biológica - Ciencias Exactas y Naturales (IQUIBICEN) Conicet - Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Ciudad de Buenos Aires, Argentina.
| | - Holger A Scheidt
- Leipzig University, Institute for Medical Physics and Biophysics, Härtelstr. 16-18, D-04107 Leipzig, Germany.
| | - Peter Müller
- Humboldt-Universität zu Berlin, Department of Biology, Invalidenstr. 42, D-10115 Berlin, Germany.
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4
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Welke RW, Haralampiev I, Schröter F, Braun BC, Herrmann A, Sieben C, Müller P. Inhibition of influenza virus activity by the bovine seminal plasma protein PDC-109. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2019; 48:503-511. [PMID: 31222413 DOI: 10.1007/s00249-019-01374-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 03/12/2019] [Accepted: 06/09/2019] [Indexed: 12/19/2022]
Abstract
A number of viruses causing sexually transmissible diseases are transmitted via mammalian seminal plasma. Several components of seminal plasma have been shown to influence those viruses and their physiological impact. To unravel whether components of seminal plasma could affect viruses transmitted via other pathways, it was investigated here whether the bovine seminal plasma protein PDC-109, belonging to the Fn-type 2 protein family, influences the activity of influenza A viruses, used as a model for enveloped viruses. We found that PDC-109 inhibits the fusion of influenza virus with human erythrocyte membranes and leads to a decreased viral infection in MDCK cells. In the presence of the head group of the phospholipid phosphatidylcholine, phosphorylcholine, the inhibitory effect of PDC-109 was attenuated. This indicates that the impact of the protein is mainly caused by its binding to viral and to erythrocyte membranes thereby interfering with virus-cell binding. Our study underlines that Fn-type 2 proteins have to be considered as new antiviral components present in mammalian seminal plasma.
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Affiliation(s)
- Robert-William Welke
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany.,Department of Intracellular Proteolysis, Max Delbrück Center for Molecular Medicine, Robert-Rössle-Str. 10, 13125, Berlin, Germany
| | - Ivan Haralampiev
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany.,Department of Crystallography, Max Delbrück Center for Molecular Medicine, Robert-Rössle-Str. 10, 13125, Berlin, Germany
| | - Filip Schröter
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315, Berlin, Germany.,Department of Cardiovascular Surgery, Heart Center Brandenburg, Brandenburg Medical School "Theodor-Fontane", Ladeburger Straße 17, 16321, Bernau, Germany
| | - Beate C Braun
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315, Berlin, Germany
| | - Andreas Herrmann
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany
| | - Christian Sieben
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany. .,Laboratory for Experimental Biophysics, School of Basic Sciences, École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland.
| | - Peter Müller
- Institute for Biology, Humboldt-Universität zu Berlin, Invalidenstr. 42, 10115, Berlin, Germany.
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The interaction of sorafenib and regorafenib with membranes is modulated by their lipid composition. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:2871-2881. [PMID: 27581086 DOI: 10.1016/j.bbamem.2016.08.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 07/29/2016] [Accepted: 08/25/2016] [Indexed: 11/22/2022]
Abstract
Sorafenib and regorafenib are small-molecule kinase inhibitors approved for the treatment of locally recurrent or metastatic, progressive, differentiated thyroid carcinoma, renal cell carcinoma, and hepatocellular carcinoma (sorafenib) and of colorectal cancer (regorafenib). As of now, the mechanisms, which are responsible for their antitumor activities, are not completely understood. Given the lipophilic nature of the molecules, it can be hypothesized that the pharmacological impact is mediated by the interaction with cellular membranes as it is true for many pharmacologically active molecules. However, an interaction of sorafenib or regorafenib with lipid membranes has not yet been investigated in detail. Here, we characterized the interaction of both drugs with lipid membranes by applying a variety of biophysical approaches including nuclear magnetic resonance, electron spin resonance, and fluorescence spectroscopy. We found that sorafenib and regorafenib bind to lipid membranes by inserting into the lipid-water interface of the bilayer. This membrane embedding causes a disturbance of bilayer structure leading to an increased permeability of the membrane for polar molecules. One approach shows that the extent of the effects depends on the membrane lipid composition underlining a particular role of phosphatidylcholine and cholesterol. Our data for the first time characterize the impact of sorafenib and regorafenib on the lipid membrane structure and dynamics, which may contribute to a better understanding of their effectiveness in the treatment of malignancies as well as of their side effects.
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Kumar CS, Swamy MJ. A pH Switch Regulates the Inverse Relationship between Membranolytic and Chaperone-like Activities of HSP-1/2, a Major Protein of Horse Seminal Plasma. Biochemistry 2016; 55:3650-7. [DOI: 10.1021/acs.biochem.5b01374] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Sudheer Kumar
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Musti J. Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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Scheidt HA, Haralampiev I, Theisgen S, Schirbel A, Sbiera S, Huster D, Kroiss M, Müller P. The adrenal specific toxicant mitotane directly interacts with lipid membranes and alters membrane properties depending on lipid composition. Mol Cell Endocrinol 2016; 428:68-81. [PMID: 27002491 DOI: 10.1016/j.mce.2016.03.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 02/26/2016] [Accepted: 03/16/2016] [Indexed: 11/20/2022]
Abstract
Mitotane (o,p'.-DDD) is an orphan drug approved for the treatment of adrenocortical carcinoma. The mechanisms, which are responsible for this activity of the drug, are not completely understood. It can be hypothesized that an impact of mitotane is mediated by the interaction with cellular membranes. However, an interaction of mitotane with (lipid) membranes has not yet been investigated in detail. Here, we characterized the interaction of mitotane and its main metabolite o,p'-dichlorodiphenyldichloroacetic acid (o,p'-DDA) with lipid membranes by applying a variety of biophysical approaches of nuclear magnetic resonance, electron spin resonance, and fluorescence spectroscopy. We found that mitotane and o,p'-DDA bind to lipid membranes by inserting into the lipid-water interface of the bilayer. Mitotane but not o,p'-DDA directly causes a disturbance of bilayer structure leading to an increased permeability of the membrane for polar molecules. Mitotane induced alterations of the membrane integrity required the presence of phosphatidylethanolamine and/or cholesterol. Collectively, our data for the first time characterize the impact of mitotane on the lipid membrane structure and dynamics, which may contribute to a better understanding of specific mitotane effects and side effects.
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Affiliation(s)
- Holger A Scheidt
- University of Leipzig, Institute of Medical Physics and Biophysics, Härtelstr. 16-18, 04107 Leipzig, Germany
| | - Ivan Haralampiev
- Humboldt University Berlin, Department of Biology, Invalidenstr. 42, 10115 Berlin, Germany
| | - Stephan Theisgen
- University of Leipzig, Institute of Medical Physics and Biophysics, Härtelstr. 16-18, 04107 Leipzig, Germany
| | - Andreas Schirbel
- University Hospital Würzburg, Department of Nuclear Medicine, Oberdürrbacher Straße 6, 97080 Würzburg, Germany
| | - Silviu Sbiera
- University Hospital Würzburg, Department of Internal Medicine I, Endocrinology and Diabetes Unit, Oberdürrbacher Straße 6, 97080 Würzburg, Germany
| | - Daniel Huster
- University of Leipzig, Institute of Medical Physics and Biophysics, Härtelstr. 16-18, 04107 Leipzig, Germany
| | - Matthias Kroiss
- University Hospital Würzburg, Department of Internal Medicine I, Endocrinology and Diabetes Unit, Oberdürrbacher Straße 6, 97080 Würzburg, Germany
| | - Peter Müller
- Humboldt University Berlin, Department of Biology, Invalidenstr. 42, 10115 Berlin, Germany.
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Le Guillou J, Ropers MH, Gaillard C, David-Briand E, van Leeuwen-Ibarrola J, Desherces S, Schmitt E, Bencharif D, Amirat-Briand L, Anton M, Tainturier D. Sequestration of bovine seminal plasma proteins by different assemblies of phosphatidylcholine: A new technical approach. Colloids Surf B Biointerfaces 2016; 140:523-530. [PMID: 26628332 DOI: 10.1016/j.colsurfb.2015.11.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 10/23/2015] [Accepted: 11/16/2015] [Indexed: 11/25/2022]
Abstract
Binder of SPerm (BSP) proteins, the main proteins from bovine seminal plasma, are known to partially intercalate into the outer leaflet of the spermatozoa membrane and bind to choline-containing lipids being present therein. This insertion generates a negative effect on semen quality after cryopreservation by inducing an early-stage capacitation of spermatozoa. The assumption of surface properties exhibited by BSP proteins was checked by tensiometry measurements: BSP proteins are highly surface active. This suggests that BSP proteins can reach the interface covered by phospholipids not only by interactions between one and each other but also due to their own surface activity. The insertion of BSP proteins into the lipid domains outer leaflet of spermatozoa was reproduced on a biomimetic system such as Langmuir monolayers. The insertion of BSP proteins can be performed in the compressible fluid domains which contain choline-bearing lipids. Monolayer films were used as well to study the complexation of BSP proteins by two phospholipid assemblies: low density lipoprotein (LDLs) from egg yolk or liposomes produced from egg phospholipids. Irrespective of the phospholipid structure (lipoprotein or liposome), BSP was hindered to alter the structure of the membrane. Only the overall ratio BSP proteins:phosphatidylcholine was important. The difference between the two sequestering agents lies on their surface properties: LDL have a strong tendency to merge with the outer layer whereas liposomes mainly remain in the bulk on the same time scale.
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Affiliation(s)
- J Le Guillou
- UPSP Risques sanitaires lies aux biotechnologies de la reproduction, ONIRIS, Nantes-Atlantic College of Veterinary Medicine and Food Science, Nantes, France; IMV Technologies, L'Aigle, France
| | - M-H Ropers
- INRA, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes, France.
| | - C Gaillard
- INRA, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes, France
| | - E David-Briand
- INRA, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes, France
| | | | | | | | - D Bencharif
- UPSP Risques sanitaires lies aux biotechnologies de la reproduction, ONIRIS, Nantes-Atlantic College of Veterinary Medicine and Food Science, Nantes, France
| | - L Amirat-Briand
- UPSP Risques sanitaires lies aux biotechnologies de la reproduction, ONIRIS, Nantes-Atlantic College of Veterinary Medicine and Food Science, Nantes, France
| | - M Anton
- INRA, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes, France
| | - D Tainturier
- UPSP Risques sanitaires lies aux biotechnologies de la reproduction, ONIRIS, Nantes-Atlantic College of Veterinary Medicine and Food Science, Nantes, France
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Schröter F, Jakop U, Teichmann A, Haralampiev I, Tannert A, Wiesner B, Müller P, Müller K. Lipid dynamics in boar sperm studied by advanced fluorescence imaging techniques. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2015; 45:149-63. [DOI: 10.1007/s00249-015-1084-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 09/09/2015] [Accepted: 09/17/2015] [Indexed: 12/23/2022]
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10
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Evolution and function of mammalian binder of sperm proteins. Cell Tissue Res 2015; 363:105-127. [DOI: 10.1007/s00441-015-2289-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 08/26/2015] [Indexed: 01/28/2023]
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Abstract
Previous studies have demonstrated that sperm head morphometry can be used as a potential diagnostic tool for detecting biophysical changes associated with sperm viability in bovine spermatozoa. In this study, sperm head morphometry was used to investigate its value as a biophysical marker for detecting volumetric changes in bovine spermatozoa under in vitro capacitating and non-capacitating incubation conditions. To further test this hypotesis, aliquots of pooled, washed bovine sperm were incubated in either Tyrode's complete medium with heparin (TCMH; a capacitating medium containing Ca2+, NaHCO3 and heparin), Tyrode's complete medium heparin-free (TCM; a medium containing just Ca2+ and NaHCO3) or Tyrode's basal medium (TBM; a non-capacitating medium free of Ca2+, NaHCO3 and heparin, used as control). Aliquots of sperm were processed for morphometric analysis at different incubation-time intervals (0, 3 and 6 h at 38°C), and the chlortetracycline assay was used simultaneously to confirm the ability of the sperm to undergo capacitation (B pattern) and the acrosome reaction (AR pattern) status in each medium. After 3 h of incubation under TCMH conditions, a significant increase was observed in the percentage of B and AR patterns and a significant decrease was found in all sperm morphometric parameters (P<0.01). Interestingly, after 6 h of incubation in TCMH, the percentage of B and AR patterns increased drastically over time and marked differences were found in the dimensional and shape parameters, which were significantly smaller compared with TBM or TCM media (P<0.001). Significant correlations were observed between sperm size and AR pattern (r=-0.875, P<0.01). In conclusion, sperm head morphometry can be used as a potential biophysical marker for detecting volumetric changes during capacitation process in bovine spermatozoa.
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Almadaly E, Hoshino Y, Ueta T, Mukoujima K, Shukry M, Farrag F, El-Kon I, Kita K, Murase T. Desalted and lyophilized bovine seminal plasma delays induction of the acrosome reaction in frozen-thawed bovine spermatozoa in response to calcium ionophore. Theriogenology 2015; 83:175-85. [DOI: 10.1016/j.theriogenology.2014.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 09/04/2014] [Accepted: 09/08/2014] [Indexed: 11/16/2022]
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Srivastava N, Jerome A, Srivastava S, Ghosh S, Kumar A. Bovine seminal PDC-109 protein: An overview of biochemical and functional properties. Anim Reprod Sci 2013; 138:1-13. [DOI: 10.1016/j.anireprosci.2013.02.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 11/21/2012] [Accepted: 02/09/2013] [Indexed: 12/23/2022]
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14
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HSP-1/2, a major protein of equine seminal plasma, exhibits chaperone-like activity. Biochem Biophys Res Commun 2012; 427:18-23. [DOI: 10.1016/j.bbrc.2012.08.120] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Accepted: 08/24/2012] [Indexed: 11/18/2022]
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15
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Tapia JA, Macias-Garcia B, Miro-Moran A, Ortega-Ferrusola C, Salido GM, Peña FJ, Aparicio IM. The Membrane of the Mammalian Spermatozoa: Much More Than an Inert Envelope. Reprod Domest Anim 2012; 47 Suppl 3:65-75. [DOI: 10.1111/j.1439-0531.2012.02046.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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16
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D'Amours O, Bordeleau LJ, Frenette G, Blondin P, Leclerc P, Sullivan R. Binder of sperm 1 and epididymal sperm binding protein 1 are associated with different bull sperm subpopulations. Reproduction 2012; 143:759-71. [DOI: 10.1530/rep-11-0392] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Previously, we showed that binder of sperm 1 (BSP1) and epididymal sperm binding protein 1 (ELSPBP1) proteins are more abundant in the immotile bovine sperm subpopulation following cryopreservation. In this study, we investigated the association of BSP1 and ELSPBP1 with sperm in relation to their ability to survive the cryopreservation process. Fresh and cryopreserved semen samples from the same ejaculate collected from nine Holstein bulls were incubated with a fixable viability probe, fixed and permeabilised and then immunolabelled with rabbit anti-BSP1, rabbit anti-ELSPBP1 or rabbit IgG as negative control. Spermatozoa were then incubated with Alexa 488-conjugated secondary antibody and Hoechst 33342. For each sample, 10 000 ‘Hoechst positive’ events were analysed by flow cytometry. Alternatively, sperm populations were obtained by fluorescence-activated cell sorting. In freshly ejaculated live sperm, two distinct BSP1 detection patterns were revealed: a first population where BSP1 is present along the flagellar region (P1 subpopulation) and a second population where BSP1 is localised on both the flagellar and the acrosomal regions (P3 subpopulation). The dead population presented a BSP1 distribution similar to P3 but with a more intense fluorescence signal (P4 subpopulation). In the corresponding cryopreserved samples, all sperm in the P3 subpopulation were dead while only a small proportion of the P1 subpopulation was dead (P2 subpopulation). ELSPBP1 was detected only in dead spermatozoa and in comparable proportions in both freshly ejaculated and cryopreserved semen. These results show that the presence of BSP1 over the acrosomal region characterises spermatozoa sensitive to cryopreservation and that ELSPBP1 characterises spermatozoa that are already dead at ejaculation.
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Post H, Schwarz A, Brandenburger T, Aumüller G, Wilhelm B. Arrangement of PMCA4 in bovine sperm membrane fractions. ACTA ACUST UNITED AC 2010; 33:775-83. [DOI: 10.1111/j.1365-2605.2009.01022.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Höfer CT, Herrmann A, Müller P. Use of liposomes for studying interactions of soluble proteins with cellular membranes. Methods Mol Biol 2010; 606:69-82. [PMID: 20013390 DOI: 10.1007/978-1-60761-447-0_6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Methods are described that have been used for characterizing the interaction of the soluble bovine seminal plasma protein PDC-109 with liposomes. PDC-109 binds to bull sperm cells upon ejaculation and is an important modulating factor of sperm cell maturation. The binding of the protein to sperm cells is mediated via lipids of the sperm plasma membrane. Most of our current knowledge about the molecular mechanisms of PDC-109-membrane interaction has been obtained by studies employing lipid vesicles. The experimental strategy described here can be applied to investigate the interaction of soluble proteins with membranes in order to understand their physiological role.
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Affiliation(s)
- Chris T Höfer
- Institut für Biologie/Biophysik, Humboldt Universität zu Berlin, Germany
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20
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Druart X, Gatti JL, Huet S, Dacheux JL, Humblot P. Hypotonic resistance of boar spermatozoa: sperm subpopulations and relationship with epididymal maturation and fertility. Reproduction 2009; 137:205-13. [DOI: 10.1530/rep-08-0225] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hypotonic resistance of boar spermatozoa was investigated by measuring the ratio of live/dead spermatozoa (SYBR-14/propidium iodide) by flow cytometry after hypotonic stress. The survival rate of ejaculated spermatozoa incubated in hypotonic solutions ranging from 3 to 330 mmol/kg followed a sigmoid curve that fitted a simple logistic model. The critical osmolality value (Osmcrit) at which 50% of spermatozoa died was determined with this model. Hypotonic resistance of spermatozoa increased with temperature between 15 and 39 °C and decreased after hydrogen superoxide treatment, but was not modified during 8 days of preservation in Beltsville thawing solution. Hypotonic resistance markedly decreased during epididymal maturation and after ejaculation as Osmcritat 15 °C was 54.7±3.2, 68.5±10.6, 116.7±2.1 and 194.3±3.7 mmol/kg for the caput, corpus, cauda and ejaculated spermatozoa respectively. Hypo-osmotic stress of 100 mmol/kg revealed a sperm subpopulation exhibiting increased hypotonic resistance compared with the whole ejaculate (Osmcrit=67.8±2.1 mmol/kg). Consistent differences were observed between lean and standard breeds (Pietrain versus Large White) and between boars within the same breed. According to data collected by artificial insemination centers during a large-scale field trial, hypotonic resistance of ejaculates was found to be positively correlated within vivofertility.
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