Vascular stiffening in aging females with a hypertension‐induced HIF2A gain‐of‐function mutation
Abstract Pulmonary arterial hypertension (PAH) is more prevalent in females than males; the causes of this sex difference have not been adequately explored. Gain‐of‐function (GOF) mutations in hypoxia‐inducible factor 2α (HIF2A) lead to PAH and thrombotic consequences in patients and mice. Additiona...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-03-01
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| Series: | Bioengineering & Translational Medicine |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/btm2.10403 |
| _version_ | 1797870921808084992 |
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| author | Eugenia Volkova Linda Procell Lingyang Kong Lakshmi Santhanam Sharon Gerecht |
| author_facet | Eugenia Volkova Linda Procell Lingyang Kong Lakshmi Santhanam Sharon Gerecht |
| author_sort | Eugenia Volkova |
| collection | DOAJ |
| description | Abstract Pulmonary arterial hypertension (PAH) is more prevalent in females than males; the causes of this sex difference have not been adequately explored. Gain‐of‐function (GOF) mutations in hypoxia‐inducible factor 2α (HIF2A) lead to PAH and thrombotic consequences in patients and mice. Additionally, multiple emerging studies suggest that elevated systemic arterial stiffening (SAS) occurs in PAH; this could have critical prognostic value. Here, we utilized a HIF2A GOF mouse model to determine how SAS can be used as a prognosticator in sex‐divergent PAH. We analyzed survival, vascular mechanics, and vascular phenotypes in young adult (8–16 weeks) and middle age (9–12 months) Hif2a GOF mice. We find that Hif2a heterozygous (HT) female mice, but not Hif2a HT male mice, exhibit poor survival, SAS upon aging, and decreased ability to withstand repeated physiological strain. Hif2a HT female mice also display thickening of the adventitial intima and increased collagen I and collagen III in all layers of the thoracic aorta. Our findings demonstrate differing PAH progression in female and male Hif2a GOF mice. Specifically, alterations in extracellular matrix (ECM) content led to vascular stiffening in aged females, resulting in poor survival. Moreover, we show that SAS emerges early in mice with PAH by coupling studies of vascular mechanics and analyzing vascular structure and composition. Importantly, we present a model for assessing sex differences in hereditary PAH progression and sex‐specific prognosis, proposing that aortic stiffening can be used to prognosticate future poor outcomes in PAH. |
| first_indexed | 2024-04-10T00:36:06Z |
| format | Article |
| id | doaj.art-31d97831abae4b3caf2516ac6c24b8fb |
| institution | Directory Open Access Journal |
| issn | 2380-6761 |
| language | English |
| last_indexed | 2024-04-10T00:36:06Z |
| publishDate | 2023-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Bioengineering & Translational Medicine |
| spelling | doaj.art-31d97831abae4b3caf2516ac6c24b8fb2023-03-14T16:53:48ZengWileyBioengineering & Translational Medicine2380-67612023-03-0182n/an/a10.1002/btm2.10403Vascular stiffening in aging females with a hypertension‐induced HIF2A gain‐of‐function mutationEugenia Volkova0Linda Procell1Lingyang Kong2Lakshmi Santhanam3Sharon Gerecht4Department of Chemical and Biomolecular Engineering Johns Hopkins University Baltimore Maryland USADepartment of Chemical and Biomolecular Engineering Johns Hopkins University Baltimore Maryland USADepartment of Chemical and Biomolecular Engineering Johns Hopkins University Baltimore Maryland USADepartment of Chemical and Biomolecular Engineering Johns Hopkins University Baltimore Maryland USADepartment of Chemical and Biomolecular Engineering Johns Hopkins University Baltimore Maryland USAAbstract Pulmonary arterial hypertension (PAH) is more prevalent in females than males; the causes of this sex difference have not been adequately explored. Gain‐of‐function (GOF) mutations in hypoxia‐inducible factor 2α (HIF2A) lead to PAH and thrombotic consequences in patients and mice. Additionally, multiple emerging studies suggest that elevated systemic arterial stiffening (SAS) occurs in PAH; this could have critical prognostic value. Here, we utilized a HIF2A GOF mouse model to determine how SAS can be used as a prognosticator in sex‐divergent PAH. We analyzed survival, vascular mechanics, and vascular phenotypes in young adult (8–16 weeks) and middle age (9–12 months) Hif2a GOF mice. We find that Hif2a heterozygous (HT) female mice, but not Hif2a HT male mice, exhibit poor survival, SAS upon aging, and decreased ability to withstand repeated physiological strain. Hif2a HT female mice also display thickening of the adventitial intima and increased collagen I and collagen III in all layers of the thoracic aorta. Our findings demonstrate differing PAH progression in female and male Hif2a GOF mice. Specifically, alterations in extracellular matrix (ECM) content led to vascular stiffening in aged females, resulting in poor survival. Moreover, we show that SAS emerges early in mice with PAH by coupling studies of vascular mechanics and analyzing vascular structure and composition. Importantly, we present a model for assessing sex differences in hereditary PAH progression and sex‐specific prognosis, proposing that aortic stiffening can be used to prognosticate future poor outcomes in PAH.https://doi.org/10.1002/btm2.10403Arterial StiffeningExtracellular MatrixHIFHIF2aHypertensionHypoxia |
| spellingShingle | Eugenia Volkova Linda Procell Lingyang Kong Lakshmi Santhanam Sharon Gerecht Vascular stiffening in aging females with a hypertension‐induced HIF2A gain‐of‐function mutation Bioengineering & Translational Medicine Arterial Stiffening Extracellular Matrix HIF HIF2a Hypertension Hypoxia |
| title | Vascular stiffening in aging females with a hypertension‐induced HIF2A gain‐of‐function mutation |
| title_full | Vascular stiffening in aging females with a hypertension‐induced HIF2A gain‐of‐function mutation |
| title_fullStr | Vascular stiffening in aging females with a hypertension‐induced HIF2A gain‐of‐function mutation |
| title_full_unstemmed | Vascular stiffening in aging females with a hypertension‐induced HIF2A gain‐of‐function mutation |
| title_short | Vascular stiffening in aging females with a hypertension‐induced HIF2A gain‐of‐function mutation |
| title_sort | vascular stiffening in aging females with a hypertension induced hif2a gain of function mutation |
| topic | Arterial Stiffening Extracellular Matrix HIF HIF2a Hypertension Hypoxia |
| url | https://doi.org/10.1002/btm2.10403 |
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