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Oliveira TS, Campos HM, Costa RM, Georg RC, Leite JA, Tostes RC, Costa EA, Santos FCA, Lobato NS, Filgueira FP, Ghedini PC. Estrone-mediated lowering of ROS and NOX4 improves endothelial function in ovariectomized wistar rats. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-03106-7. [PMID: 38643455 DOI: 10.1007/s00210-024-03106-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 04/13/2024] [Indexed: 04/22/2024]
Abstract
Estrone (E1) constitutes the primary component in oral conjugated equine estrogens (CEEs) and serves as the principal estrogen precursor in the female circulation in the post-menopause. E1 induces endothelium-dependent vasodilation and activate PI3K/NO/cGMP signaling. To assess whether E1 mitigates vascular dysfunction associated with postmenopause and explore the underlying mechanisms, we examined the vascular effects of E1 in ovariectomized (OVX) rats, a postmenopausal experimental model. Blood pressure was measured using tail-cuff plethysmography, and aortic rings were isolated to assess responses to phenylephrine, acetylcholine (ACh), and sodium nitroprusside. Responses to ACh in rings pre-incubated with superoxide dismutase (SOD), catalase (CAT), or apocynin were also evaluated. Protein expression of SOD, CAT, NOX1, NOX2, and NOX4 was determined by Western blotting. E1 treatment resulted in decreased body weight and retroperitoneal fat, increased uterine weight, and prevented elevated blood pressure in the OVX group. Furthermore, E1 improved endothelium-dependent ACh vasodilation, activated compensatory antioxidant mechanisms - i.e. increased SOD and CAT antioxidant enzymes activity, and decreased NOX4 expression. This, in turn, helped prevent oxidative stress and endothelial dysfunction in OVX rats. Additionally, E1 treatment reversed the increased total LDL cholesterol observed in the OVX group. The findings underscore protective effects of E1 on the cardiovascular system, counteracting OVX-related oxidative stress and endothelial dysfunction in Wistar rats. E1 exhibits promising therapeutic benefits for managing cardiovascular health, particularly in postmenopausal conditions.
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Affiliation(s)
- Thiago S Oliveira
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, Brazil
- Department of Pharmacy, Laboratory of Experimental Pharmacology, FCBS, Federal University of the Jequitinhonha and Mucuri Valleys, Diamantina, MG, Brazil
| | - Hericles M Campos
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, Brazil
| | - Rafael M Costa
- Department of Pharmacology, Laboratory of Vascular Biology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
- School of Medicine, Federal University of Jataí, Jataí, Brazil
| | - Raphaela C Georg
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, Brazil
| | - Jacqueline A Leite
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, Brazil
| | - Rita C Tostes
- Department of Pharmacology, Laboratory of Vascular Biology, Ribeirao Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Elson A Costa
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, Brazil
| | - Fernanda Cristina A Santos
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, Brazil
| | - Núbia S Lobato
- School of Medicine, Federal University of Jataí, Jataí, Brazil
| | | | - Paulo César Ghedini
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Goiás, Goiânia, GO, Brazil.
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Kundert DN, Tavassol F, Kampmann A, Gellrich NC, Lindhorst D, Precht MM, Schumann P. Alendronate reduces periosteal microperfusion in vivo. Heliyon 2023; 9:e19468. [PMID: 37681156 PMCID: PMC10481298 DOI: 10.1016/j.heliyon.2023.e19468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/11/2023] [Accepted: 08/23/2023] [Indexed: 09/09/2023] Open
Abstract
Objectives Bisphosphonates are known to induce a severe adverse effect known as medication-related osteonecrosis of the jaw (MRONJ). Previous studies have proven the impact of bisphosphonates on microperfusion; therefore, this study aimed to investigate alendronate-induced microcirculatory reactions in the calvarial periosteum of rats. Study design Bone chambers were implanted into 48 Lewis rats. Microhemodynamics, inflammatory parameters, functional capillary density and defect healing were examined after alendronate treatment for two and six weeks using repetitive intravital fluorescence microscopy for two weeks. Results Microhemodynamics remained unchanged. In alendronate-treated rats, inflammation was slightly increased, functional capillary density was significantly reduced (day 10: controls 100.45 ± 5.38 cm/cm2, two weeks alendronate treatment 44.77 ± 3.55 cm/cm2, six weeks alendronate treatment 27.54 ± 2.23 cm/cm2) and defect healing was decelerated. The changes in functional capillary density and defect healing were dose-dependent. Conclusion The bisphosphonate alendronate has a significant negative impact on periosteal microperfusion in vivo. This could be a promising target for the treatment of MRONJ.
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Affiliation(s)
- Danielle N. Kundert
- Division of Cranio-Maxillo-Facial and Oral Surgery, University Hospital Zurich, University of Zurich, Frauenklinikstrasse 24, 8091, Zürich, Switzerland
| | - Frank Tavassol
- Department of Oral and Maxillofacial Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany
| | - Andreas Kampmann
- Department of Oral and Maxillofacial Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany
| | - Nils-Claudius Gellrich
- Department of Oral and Maxillofacial Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany
| | - Daniel Lindhorst
- Kieferchirurgie-Zentrum-Hamburg, Lerchenfeld 14, 22081, Hamburg, Germany
| | - Marc M. Precht
- Division of Cranio-Maxillo-Facial and Oral Surgery, University Hospital Zurich, University of Zurich, Frauenklinikstrasse 24, 8091, Zürich, Switzerland
| | - Paul Schumann
- Division of Cranio-Maxillo-Facial and Oral Surgery, University Hospital Zurich, University of Zurich, Frauenklinikstrasse 24, 8091, Zürich, Switzerland
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Impact of Whole Body Vibration and Zoledronic Acid on Femoral Structure after Ovariectomy: Morphological Evaluation. J Clin Med 2022; 11:jcm11092441. [PMID: 35566566 PMCID: PMC9101134 DOI: 10.3390/jcm11092441] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/20/2022] [Accepted: 04/26/2022] [Indexed: 01/27/2023] Open
Abstract
Our study aimed to evaluate the effect of whole body vibration (WBV) treatment as an non-pharmacological method of treatment for early osteopenia in ovariectomized female rats. In total, 48 female Wistar rats were assigned to two groups: sham-operated control (SHAM, n = 12) and ovariectomized (n = 36). Four weeks after ovariectomy, the animals were divided into three experimental groups (n = 12 each): ovariectomized (OVX), ovariectomized subjected to whole body vibration with acceleration level of 0.3 g (OVX + WBV), or ovariectomized subjected to i.m. injection of Zoledronic acid at a dose of 0.025 mg/kg (OVX + ZOL). After the 8th and 16th week of treatment n = 6 rats from each group were euthanized and isolated femora were subjected to histological examination of trabecular bone and analysis of the expression of collagen 1 (Col1), osteoprotegerin (OPG), and receptor activator of nuclear factor kappa-Β ligand (RANKL) involved in bone turnover. The obtained results indicated that widespread vibration therapy can provide negative outcomes such as deterioration of trabecular bone histomorphometry.
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Kostyshyn NM, Gzhegotskyi MR, Kostyshyn LP, Mudry SI. Effect of zoledronic acid on bone nanocomposites organization and prevention of bone mineral density loss in ovariectomized rats. Drug Metab Pers Ther 2021; 36:239-245. [PMID: 33770826 DOI: 10.1515/dmpt-2020-0187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 01/28/2021] [Indexed: 01/30/2023]
Abstract
OBJECTIVES Osteoporosis often occurs in individuals of different age groups, frequently during menopause and after ovariectomy. It increases the risk of pathological fractures almost twice. The aim of our research was to assess bone metabolism, nanocomposite structure of the tibia under conditions of ovariectomy and zoledronic acid treatment. METHODS X-ray diffraction has been performed for nanostructure analysis of mineral crystallites and crystal lattice of hydroxyapatite in the tibia samples of ovariectomized rats with additional application of bisphosphonate zoledronic acid (0.025 mg/kg). Markers of remodeling - osteocalcin, alkaline phosphatase, tartrate resistant acid phosphatase 5b - were determined. Quantitative amount of calcium in the bones was detected by atomic absorption method. RESULTS Zoledronic acid prevented loss of mineral mass after ovariectomy. Rats after ovariectomy, treated with zoledronic acid, showed statistically higher (р<0.05) values of crystalline phase and calcium content compared with the SHAM-surgery and ovariectomy groups (р<0.05). Zoledronic acid inhibited bone remodeling, which is proved by tartrate resistant acid phosphatase 5b reduction and inhibition of osteoclasts during the experiment. CONCLUSIONS These results enable to suggest that zoledronic acid can improve mineral mass of the bone during menopause in individuals of different age groups.
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Affiliation(s)
- Nazar M Kostyshyn
- Department of Normal Physiology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Mechyslav R Gzhegotskyi
- Department of Normal Physiology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Liybov P Kostyshyn
- Department of Toxicological and Analytical Chemistry, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Stepan I Mudry
- Department of Metal Physics, Ivan Franko National University, Lviv, Ukraine
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