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Frisée V, Rigaux G, Dufour P, Barbato O, Brutinel F, Egyptien S, Bossaert P, Deleuze S, Cavalier E, Ponthier J. American Bison (Bison bison) reproductive endocrinology: serum Pregnancy Associated Glycoproteins (PAG), Progesterone, Estrone and Estrone-Sulfate in non pregnant animals and during gestation. Domest Anim Endocrinol 2022; 78:106684. [PMID: 34634728 DOI: 10.1016/j.domaniend.2021.106684] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 11/21/2022]
Abstract
This study describes concentrations of Pregnancy Associated Glycoproteins (PAG), progesterone (P4), estrone (E1) and estrone-sulfate (E1S) in American Bison sera. In 2 ranches, mature American Bison were sampled once a year for 2 yr. Subsequent American Bison cows calving days were reported. PAG concentration was determined by Radio-Immuno Assay, whereas P4, E1 and E1S were assayed using Liquid Chromatography and Mass Spectrometry. Concentrations were compared between American Bison bulls (B, n = 7), Nonpregnant cows (NP, n = 32), first (1TP, n = 3), second (2TP, n = 26) and third (3TP, n = 15) trimester of pregnancy. Seven American Bison bulls and 92 cows were sampled, 51 calved during these 2 yr. Calving occurred mostly in spring (74.5%), but also in summer (13.7%) and fall (11.8%). PAG and P4 were higher in 2TP and 3TP than B and NP (P< 0.0001). P4 was non-basal in B and NP. E1 and E1S were correlated (P< 0.0001; r = 0.76) and increased in 2TP and 3TP when compared with B and NP (P< 0.01). Moreover, E1S was higher in 3TP than in 2TP (P< 0.0001) and correlated to pregnancy day (P< 0.0001; r = 0.60). Breeding American Bison in Belgium induces a calving seasonality loss. P4 slowly increases in 1TP and remains steady and high in 2 and 3TP. P4 non-basal and variable concentrations in B or NP disable its use as gestation marker. American Bison produce PAG in the 2 and 3TP, but Estrone-sulfate assay seems to be the best pregnancy marker during the 2 last trimesters as it could help to estimate the gestation period.
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Affiliation(s)
- V Frisée
- Production animals Department, Liège University, Liège, Belgium
| | | | - P Dufour
- Clinical Chemistry, University Hospital (CHU), Liège University, Liège, Belgium
| | - O Barbato
- Veterinary Medicine Department, Perugia University, Perugia, Italy
| | - F Brutinel
- Theriogenology, Liège University, Liège, Belgium
| | - S Egyptien
- Theriogenology, Liège University, Liège, Belgium
| | - P Bossaert
- Production animals Department, Liège University, Liège, Belgium
| | - S Deleuze
- Theriogenology, Liège University, Liège, Belgium
| | - E Cavalier
- Clinical Chemistry, University Hospital (CHU), Liège University, Liège, Belgium
| | - J Ponthier
- Theriogenology, Liège University, Liège, Belgium.
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Bœuf-Muraille G, Rigaux G, Callewaert M, Zambrano N, Van Gulick L, Roullin VG, Terryn C, Andry MC, Chuburu F, Dukic S, Molinari M. Evaluation of mTHPC-loaded PLGA nanoparticles for in vitro photodynamic therapy on C6 glioma cell line. Photodiagnosis Photodyn Ther 2019; 25:448-455. [PMID: 30708089 DOI: 10.1016/j.pdpdt.2019.01.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 12/11/2018] [Revised: 01/14/2019] [Accepted: 01/22/2019] [Indexed: 12/17/2022]
Abstract
Photodynamic therapy (PDT) is a very attractive strategy to complement or replace common cancer treatments such as radiotherapy, surgery, and chemotherapy. Some molecules have shown their efficiency as photosensitizers (PS), still many issues have to be solved such as the inherent cytotoxicity of the PS or its hydrophobic properties causing limitation in their solubility, leading to side effects. In this study, the encapsulation of an approved PS, the meso-tetra hydroxyphenylchlorine (mTHPC, Foscan®) within biocompatible and biodegradable poly(D, l-lactide-co-glycolide) acid (PLGA) NPs prepared by the nanoprecipitation method was studied. The mTHPC-loaded NPs (mTHPC ⊂ PLGA NPs) were analyzed by UV-vis spectroscopy to determine the efficiency of mTHPC encapsulation, and by dynamic light scattering (DLS) and atomic force microscopy (AFM) to determine mTHPC ⊂ PLGA NPs sizes, morphologies and surface charges. The longitudinal follow-up of mTHPC release from the NPs indicated that 50% of the encapsulated PS was retained within the NP matrix after a period of five days. Finally, the cytotoxicity and the phototoxicity of the mTHPC ⊂ PLGA NPs were determined in murine C6 glioma cell lines and compared to the ones of mTHPC alone. The studies showed a strong decrease of mTHPC cytotoxicity and an increase of mTHPC photo-cytotoxicity when mTHPC was encapsulated. In order to have a better insight of the underlying cellular mechanisms that governed cell death after mTHPC ⊂ PLGA NPs incubation and irradiation, annexin V staining tests were performed. The results indicated that apoptosis was the main cell death mechanism.
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Affiliation(s)
- G Bœuf-Muraille
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne Ardenne, 51687, Reims Cedex 2, France; Laboratoire de Recherche en Nanosciences LRN EA 4682, University of Reims Champagne-Ardenne URCA, 51685, Reims Cedex 2, France
| | - G Rigaux
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne Ardenne, 51687, Reims Cedex 2, France
| | - M Callewaert
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne Ardenne, 51687, Reims Cedex 2, France
| | - N Zambrano
- Laboratoire de Recherche en Nanosciences LRN EA 4682, University of Reims Champagne-Ardenne URCA, 51685, Reims Cedex 2, France
| | - L Van Gulick
- BioSpecT, Faculty of Pharmacy, University of Reims Champagne Ardenne URCA, 51100, Reims, France
| | - V G Roullin
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne Ardenne, 51687, Reims Cedex 2, France; Laboratoire de Nanotechnologies Pharmaceutiques, Faculté de Pharmacie, Université de Montréal, Montréal, H3T 1J4, Canada
| | - C Terryn
- PICT platform, University of Reims Champagne-Ardenne, 51100, Reims, France
| | - M-C Andry
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne Ardenne, 51687, Reims Cedex 2, France
| | - F Chuburu
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne Ardenne, 51687, Reims Cedex 2, France
| | - S Dukic
- BioSpecT, Faculty of Pharmacy, University of Reims Champagne Ardenne URCA, 51100, Reims, France
| | - M Molinari
- Laboratoire de Recherche en Nanosciences LRN EA 4682, University of Reims Champagne-Ardenne URCA, 51685, Reims Cedex 2, France; CBMN CNRS UMR 5248, Université de Bordeaux, INP Bordeaux, 33600 Pessac, France.
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Rigaux G, Parrilla-Hernandez S, Egyptien S, Gatez C, Carrasco-Leroy C, Deleuze S, Ponthier J. On-field Electro-ejaculation of Wild Prezwalski Horses: Results and Perspectives. J Equine Vet Sci 2018. [DOI: 10.1016/j.jevs.2018.05.050] [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: 10/28/2022]
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Rigaux G, Gheran CV, Callewaert M, Cadiou C, Voicu SN, Dinischiotu A, Andry MC, Vander Elst L, Laurent S, Muller RN, Berquand A, Molinari M, Huclier-Markai S, Chuburu F. Characterization of Gd loaded chitosan-TPP nanohydrogels by a multi-technique approach combining dynamic light scattering (DLS), asymetrical flow-field-flow-fractionation (AF4) and atomic force microscopy (AFM) and design of positive contrast agents for molecular resonance imaging (MRI). Nanotechnology 2017; 28:055705. [PMID: 28029111 DOI: 10.1088/1361-6528/aa5188] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Chitosan CS-tripolyphosphate TPP/hyaluronic acid HA nanohydrogels loaded with gadolinium chelates (GdDOTA ⊂ CS-TPP/HA NGs) synthesized by ionic gelation were designed for lymph node (LN) MRI. In order to be efficiently drained to LNs, nanogels (NGs) needed to exhibit a diameter ϕ < 100 nm. For that, formulation parameters were tuned, using (i) CS of two different molecular weights (51 and 37 kDa) and (ii) variable CS/TPP ratio (2 < CS/TPP < 8). Characterization of NG size distribution by dynamic light scattering (DLS) and asymetrical flow-field-flow-fractionation (AF4) showed discrepancies since DLS diameters were consistently above 200 nm while AF4 showed individual nano-objects with ϕ < 100 nm. Such a difference could be correlated to the presence of aggregates inherent to ionic gelation. This point was clarified by atomic force microscopy (AFM) in liquid mode which highlighted the main presence of individual nano-objects in nanosuspensions. Thus, combination of DLS, AF4 and AFM provided a more precise characterization of GdDOTA ⊂ CS-TPP/HA nanohydrogels which, in turn, allowed to select formulations leading to NGs of suitable mean sizes showing good MRI efficiency and negligible toxicity.
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Affiliation(s)
- G Rigaux
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, Université de Reims Champagne-Ardenne URCA, F-51685 Reims Cedex 2, France
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Rigaux G, Roullin VG, Cadiou C, Portefaix C, Van Gulick L, Bœuf G, Andry MC, Hoeffel C, Vander Elst L, Laurent S, Muller R, Molinari M, Chuburu F. A new magnetic resonance imaging contrast agent loaded into poly(lacide-co-glycolide) nanoparticles for long-term detection of tumors. Nanotechnology 2014; 25:445103. [PMID: 25325295 DOI: 10.1088/0957-4484/25/44/445103] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The incorporation of a lipophilic Gd chelate (GdDO3A-C12) in biocompatible PLGA poly(D, L-lactide-co-glycolide) nanoparticles was explored as an approach to increase the relaxivity of contrast agents for magnetic resonance imaging. By nanoprecipitation, it was possible to obtain PEGylated gadolinium nanoparticles (mean diameter of 155 nm) with high Gd loading (1.1 × 10(4) Gd centers per nanoparticle). The corresponding GdDO3AC12 ⊂ NPs nanoparticles exhibited an enhanced relaxivity (up to sixfold greater than DOTAREM® at 40 MHz) because the nanoparticle framework constrained the lipophilic Gd chelate motion and favorably impacted the Gd chelate rotational correlation time. T1-weighted imaging at 3 T on phantoms showed enhanced contrast for the GdDO3AC12 ⊂ NPs. Importantly, Gd chelate leakage was almost nonexistent, which suggested that these GdDO3AC12 ⊂ NPs could be useful for long-term MRI detection.
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Affiliation(s)
- G Rigaux
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR des Sciences Exactes et Naturelles, Bâtiment 18-Europol'Agro, BP1039, F-51687 Reims Cedex 2, France. Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR Pharmacie Reims, 51 rue Cognacq-Jay, F-51100 Reims, France
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Vleminckx C, Klemans W, Schriewer L, Joris I, Lijsen N, Ottogali M, Pays A, Planard C, Rigaux G, Ros Y, Vande Rivière M, Vandenvelde J, De Plaen P, Lakhanisky TH, Maes A, Verschaeve L. Performance of cytogenetic biomarkers on children exposed to environmental pollutants. Toxicol Ind Health 1997; 13:219-30. [PMID: 9200790 DOI: 10.1177/074823379701300209] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- C Vleminckx
- Division of Toxicology, Scientific Institute of Public Health-Louis Pasteur, Brussels, Belgium.
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Arrigo C, Rigaux G, Farnault G, Alluard E. 1289 Primary prevention and screening guidelines: Impact of a short training program on nurses’ knowledge and perception of their teaching role. Eur J Cancer 1995. [DOI: 10.1016/0959-8049(95)96535-l] [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: 10/27/2022]
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Klemans W, Vleminckx C, Schriewer L, Joris I, Lijsen N, Maes A, Ottogali M, Pays A, Planard C, Rigaux G. Cytogenetic biomonitoring of a population of children allegedly exposed to environmental pollutants. Phase 2: Results of a three-year longitudinal study. Mutat Res 1995; 342:147-56. [PMID: 7715616 DOI: 10.1016/0165-1218(95)90024-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [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: 01/26/2023]
Abstract
Our previous cytogenetic biomonitoring of a group of inhabitants in a village (Mellery, Belgium) where exposure to a mixture of toxic environmental pollutants, (probably originating from a neighbouring chemical waste disposal site) was suspected, showed that difference in the SCE and HFC bioassays was more pronounced for children. The results of follow-up study in 1992 confirmed this surprising conclusion by an even higher incidence. As very few studies have been performed on the levels of children's biomarkers, this group of exposed populations needed to be explored further. Do children residing in the vicinity of hazardous waste sites indeed represent a population at higher risk? In the present study, we compare the performance of various bioassays (SCE, HFC, SSB and MN) in extended exposed and reference children's groups. Simultaneously, in the exposed group, we followed variation in the lymphocyte SCE frequencies as a function of time. Reversibility of the latter biomarker was ascertained subsequent to a preliminary technical remediation of the disposal site. We compared these data with those obtained from a synchronous cross-sectional study on a group of children living near a similar chemical disposal site. The two exposed populations did not differ from the reference population regarding to the SCE and HFC mean levels. Comparisons of the mean levels of the two other biomarkers, SSB and MN, showed no difference between the Mellery exposed children and the reference group from Wavre whereas significant differences appeared when the Hensies group is compared either to the Mellery or to the Wavre reference group.
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Affiliation(s)
- W Klemans
- Division of Toxicology, Institute of Hygiene and Epidemiology, J. Wytsman 14, Brussels, Belgium
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Rigaux G, Ehrenreich A, Hennequin JP. [Clinical trials of FH 027 (synthetic estroprogesteroid)]. Bull Fed Soc Gynecol Obstet Lang Fr 1967; 19:67-8. [PMID: 5602163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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