1
|
Cáceres ARR, Cardone DA, Sanhueza MDLÁ, Bosch IM, Cuello-Carrión FD, Rodriguez GB, Scotti L, Parborell F, Halperin J, Laconi MR. Local effect of allopregnanolone in rat ovarian steroidogenesis, follicular and corpora lutea development. Sci Rep 2024; 14:6402. [PMID: 38493224 PMCID: PMC10944484 DOI: 10.1038/s41598-024-57102-1] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 03/14/2024] [Indexed: 03/18/2024] Open
Abstract
Allopregnanolone (ALLO) is a known neurosteroid and a progesterone metabolite synthesized in the ovary, CNS, PNS, adrenals and placenta. Its role in the neuroendocrine control of ovarian physiology has been studied, but its in situ ovarian effects are still largely unknown. The aims of this work were to characterize the effects of intrabursal ALLO administration on different ovarian parameters, and the probable mechanism of action. ALLO administration increased serum progesterone concentration and ovarian 3β-HSD2 while decreasing 20α-HSD mRNA expression. ALLO increased the number of atretic follicles and the number of positive TUNEL granulosa and theca cells, while decreasing positive PCNA immunostaining. On the other hand, there was an increase in corpora lutea diameter and PCNA immunostaining, whereas the count of TUNEL-positive luteal cells decreased. Ovarian angiogenesis and the immunohistochemical expression of GABAA receptor increased after ALLO treatment. To evaluate if the ovarian GABAA receptor was involved in these effects, we conducted a functional experiment with a specific antagonist, bicuculline. The administration of bicuculline restored the number of atretic follicles and the diameter of corpora lutea to normal values. These results show the actions of ALLO on the ovarian physiology of the female rat during the follicular phase, some of them through the GABAA receptor. Intrabursal ALLO administration alters several processes of the ovarian morpho-physiology of the female rat, related to fertility and oocyte quality.
Collapse
Affiliation(s)
- Antonella Rosario Ramona Cáceres
- Laboratorio de Fisiopatología Ovárica, Instituto de Medicina y Biología Experimental de Cuyo (IMBECU - CONICET Mendoza), Av. Ruiz Leal s/n Parque General San Martín, CP 5500, Mendoza, Argentina
- Facultad de Ingeniería y Facultad de Ciencias Médicas, Universidad de Mendoza, Mendoza, Argentina
| | - Daniela Alejandra Cardone
- Laboratorio de Fisiopatología Ovárica, Instituto de Medicina y Biología Experimental de Cuyo (IMBECU - CONICET Mendoza), Av. Ruiz Leal s/n Parque General San Martín, CP 5500, Mendoza, Argentina
| | - María de Los Ángeles Sanhueza
- Laboratorio de Fisiopatología Ovárica, Instituto de Medicina y Biología Experimental de Cuyo (IMBECU - CONICET Mendoza), Av. Ruiz Leal s/n Parque General San Martín, CP 5500, Mendoza, Argentina
| | | | - Fernando Darío Cuello-Carrión
- Laboratorio de Oncología, Instituto de Medicina y Biología Experimental de Cuyo (IMBECU - CONICET Mendoza), Mendoza, Argentina
| | | | - Leopoldina Scotti
- Ovarian Pathophysiology Studies Laboratory, Institute of Experimental Biology and Medicine (IByME) - CONICET, Buenos Aires, Argentina
| | - Fernanda Parborell
- Ovarian Pathophysiology Studies Laboratory, Institute of Experimental Biology and Medicine (IByME) - CONICET, Buenos Aires, Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
| | - Myriam Raquel Laconi
- Laboratorio de Fisiopatología Ovárica, Instituto de Medicina y Biología Experimental de Cuyo (IMBECU - CONICET Mendoza), Av. Ruiz Leal s/n Parque General San Martín, CP 5500, Mendoza, Argentina.
- Facultad de Ingeniería y Facultad de Ciencias Médicas, Universidad de Mendoza, Mendoza, Argentina.
| |
Collapse
|
2
|
Schmidt AR, Inserra PIF, Giacchino M, Ferraris S, Lange F, Figueredo RV, Halperin J, Vitullo AD, Dorfman VB. Neurovascular description in the South American plains vizcacha, Lagostomus maximus (Chinchilloidea, Caviomorpha). A study involving evolutionarily related species of Caviomorpha and Muroidea. Anat Rec (Hoboken) 2024; 307:658-668. [PMID: 38328879 DOI: 10.1002/ar.25318] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/29/2023] [Accepted: 08/31/2023] [Indexed: 02/09/2024]
Abstract
Oxygenated blood is required for the adequate metabolic activity of the brain. This is supplied by the circle of Willis (CoW) and the vertebrobasilar and carotid systems. The CoW ensures blood flow in case of arterial stenosis or occlusion. Different animal models have been explored for the CoW morphological and functional study. This work aims to characterize the vascular architecture of the CoW of the plains vizcacha, Lagostomus maximus (Suborder: Hystricomorpha), and to compare it with evolutionarily related species of Caviomorpha and Muroidea. The blood supply in adult plains vizcachas was studied using latex cerebrovascular casts and angiography. A caudo-rostral flow direction was determined, beginning in the spinal and vertebral arteries and converging in the basilar artery which bifurcates in the carotid-basilar communication in the caudal communicating arteries. In the first third of its course, the caudal cerebral arteries project laterally, and the middle and rostral cerebral arteries bifurcate from their rostral terminal segment, supplying the temporo-parietal and frontal cortex. The CoW architecture is mainly conserved between rodent species. Likewise, the small neurovascular variations observed could be considered phylogenetic morphological variations more than evolutionary adaptations. The absence of the rostral communicating artery that generates the rostral open architecture of the CoW in the vizcacha as in the other analyzed species, supports the need for a revision of the CoW classical function as a security system. Finally, this work supports the importance of expanding our understanding of brain anatomy among species, which may contribute to a better understanding of functional neuroanatomy.
Collapse
Affiliation(s)
- Alejandro Raúl Schmidt
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Pablo Ignacio Felipe Inserra
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Mariela Giacchino
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
| | - Sergio Ferraris
- Centro de Ciencias Veterinarias (CCV), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
| | - Fernando Lange
- Centro de Ciencias Veterinarias (CCV), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
| | - Ramiro Vidal Figueredo
- Facultad de ciencias veterinarias, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Alfredo Daniel Vitullo
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Verónica Berta Dorfman
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| |
Collapse
|
3
|
Cortasa SA, Schmidt AR, Proietto S, Corso MC, Inserra PIF, Giorgio NPD, Lux-Lantos V, Vitullo AD, Halperin J, Dorfman VB. Hypothalamic GnRH expression and pulsatility depends on a balance of prolactin receptors in the plains vizcacha, Lagostomus maximus. J Comp Neurol 2023; 531:720-742. [PMID: 36716283 DOI: 10.1002/cne.25457] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 12/01/2022] [Accepted: 01/06/2023] [Indexed: 02/01/2023]
Abstract
In mammals, gestation is considered a physiological hyperprolactinemia status. Prolactin (PRL) is one of the modulators of gonadotropin-releasing hormone (GnRH) neurons function. The South American plains vizcacha (Lagostomus maximus) is a unique model to study the regulation of hypothalamic GnRH neurons by direct and indirect steroid-dependent pathways. The aim was to characterize the hypothalamic expression of endocrine markers in vizcacha during gestation as well as their response to experimental induced hyperprolactinemia. The possible involvement of PRL regulatory pathways on GnRH in the context of hypothalamic and pituitary reactivation in mid-gestating vizcachas was discussed. Using two in vivo approaches, we determined changes in the hypothalamic expression and distribution of prolactin receptor (PRLR), tyrosine hydroxylase (TH), and dopamine type 2 receptor. A significant increment in the number of tuberoinfundibular dopaminergic (TIDA) neurons was determined in the arcuate nucleus from early to term pregnancy. On the other hand, at preoptic area, the number of both TH+PRLR+ and GnRH+PRLR+ double-labeled neurons significantly decreased at mid-pregnancy probably allowing the recovery of GnRH expression indicating that both types of neurons may represent the key points of PRL indirect and direct pathways modulating GnRH. Moreover, in a model of induced hyperprolactinemic vizcachas, the inhibitory effect of PRL on GnRH at both expression and delivery levels were confirmed. These results suggest the concomitant participation of both PRL regulatory pathways on GnRH modulation and pinpoint the key role of PRL on GnRH expression enabling the recovery of the hypothalamic activity during the gestation in this species.
Collapse
Affiliation(s)
- Santiago Andrés Cortasa
- Department of Biological and Biomedical Sciences, Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Alejandro Raúl Schmidt
- Department of Biological and Biomedical Sciences, Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Sofía Proietto
- Department of Biological and Biomedical Sciences, Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - María Clara Corso
- Department of Biological and Biomedical Sciences, Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Pablo Ignacio Felipe Inserra
- Department of Biological and Biomedical Sciences, Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Noelia Paula Di Giorgio
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME)-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Victoria Lux-Lantos
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME)-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Alfredo Daniel Vitullo
- Department of Biological and Biomedical Sciences, Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Julia Halperin
- Department of Biological and Biomedical Sciences, Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Verónica Berta Dorfman
- Department of Biological and Biomedical Sciences, Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| |
Collapse
|
4
|
Cortasa SA, Inserra PFI, Proietto S, Corso MC, Schmidt AR, Vitullo AD, Dorfman VB, Halperin J. Achieving full-term pregnancy in the vizcacha relies on a reboot of luteal steroidogenesis in mid-gestation (Lagostomus maximus, Rodentia). PLoS One 2022; 17:e0271067. [PMID: 35802690 PMCID: PMC9269958 DOI: 10.1371/journal.pone.0271067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 06/22/2022] [Indexed: 11/19/2022] Open
Abstract
Reactivation of the hypothalamic-pituitary-ovarian (HPO) axis triggered by the decline in serum progesterone in mid-gestation is an uncommon trait that distinguishes the vizcacha from most mammals. Accessory corpora lutea (aCL) developed upon this event have been proposed as guarantors of the restoration of the progesterone levels necessary to mantain gestation. Therefore, the steroidogenic input of primary CL (pCL) vs aCL was evaluated before and after HPO axis-reactivation (BP and AP respectively) and in term pregnancy (TP). Nonpregnant-ovulated females (NP) were considered as the pCL-starting point group. In BP, the ovaries mainly showed pCL, whose LH receptor (LHR), StAR, 3β-HSD, 20α-HSD, and VEGF immunoexpressions were similar or lower than those of NP. In AP, luteal reactivity increased significantly compared to the previous stages, and the pool of aCL developed in this stage represented 20% of the ovarian structures, equaling the percentage of pCL. Both pCL and aCL luteal cells shared similar histological features consistent with secretory activity. Although pCL and aCL showed equivalent labeling intensity for the luteotropic markers, pCL were significantly larger than aCL. Towards TP, both showed structural disorganization and loss of secretory characteristics. No significant DNA fragmentation was detected in luteal cells throughout gestation. Our findings indicate that the LH surge derived from HPO axis-reactivation targets the pCL and boost luteal steroidogenesis and thus progesterone production. Because there are many LHR-expressing antral follicles in BP, they also respond to the LH stimuli and luteinize without extruding the oocyte. These aCL certainly contribute but it is the steroidogenic restart of the pCL that is the main force that restores progesterone levels, ensuring that gestation is carried to term. Most importantly, the results of this work propose luteal steroidogenesis reboot as a key event in the modulation of vizcacha pregnancy and depict yet another distinctive aspect of its reproductive endocrinology.
Collapse
Affiliation(s)
- Santiago Andrés Cortasa
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Pablo Felipe Ignacio Inserra
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Sofía Proietto
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - María Clara Corso
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Alejandro Raúl Schmidt
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Alfredo Daniel Vitullo
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Verónica Berta Dorfman
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
- * E-mail:
| |
Collapse
|
5
|
Raúl Schmidt A, Ignacio Felipe Inserra P, Andrés Cortasa S, Proietto S, Fidel V, Halperin J, Daniel Vitullo A, Berta Dorfman V. Distribution of kisspeptin system and its relation with gonadotropin-releasing hormone in the hypothalamus of the South American plains vizcacha, Lagostomus maximus. Gen Comp Endocrinol 2022; 317:113974. [PMID: 34973969 DOI: 10.1016/j.ygcen.2021.113974] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 12/21/2021] [Accepted: 12/26/2021] [Indexed: 11/20/2022]
Abstract
Kisspeptin (KISS), a key hormone involved in the regulation of the hypothalamic-pituitary-ovarian (HPO) axis, has been localized in the anteroventral periventricular (AVPV) nucleus and the neighboring rostral periventricular nucleus (PeVN), and in the arcuate (ARC) nucleus of the mammalian hypothalamus. In the ARC, the KISS neurons that co-express neurokinin B (NKB) and dynorphin A (Dyn) are named KNDy cells. The South American plains vizcacha is a rodent with peculiar reproductive traits. Around mid-pregnancy, vizcacha shows the reactivation of its HPO axis with the pulsatile release of gonadotropin-releasing hormone (GnRH) and luteinizing hormone (LH), an essential event for the success of gestation. Considering the role of KISS system in GnRH modulation, the aim of this work was to study their neuroanatomical distribution in adult vizcachas. AVPV showed sexual dimorphism with a significant smaller area in males (t-Test, p < 0.05), and KISS immunoreactivity was detected in somas and varicosities homogenously distributed in the AVPV with a concordant sex-related expression pattern. NKB and Dyn expression was also observed in cytoplasm of neurons scattered in the AVPV. Three subpopulations of neurons were detected in the AVPV: neurons expressing Dyn and NKB (DyNK cells), neurons expressing KISS and NKB (KiNK cells), and single NKB expressing neurons. Strikingly, KISS and Dyn were always expressed in different cells. In addition, in the ARC nucleus, KNDy cells were detected. On the other hand, KISS and GnRH expression was detected in different subpopulations of neurons, GnRH cells showed KISS receptor (KISSR or GPR-54) expression, and KISS immunoreactive afferent contacts were detected making close appositions onto somas and dendrites of GnRH cells. These results show similarities and differences between the KISS system in the hypothalamus of the vizcacha and other mammals, and constitute crucial observations about KISS and GnRH relation. Considering the peculiarity of HPO axis regulation in this species, the present work provides a neuroanatomical framework for the further elucidation of molecular mechanisms underlying GnRH expression and secretion.
Collapse
Affiliation(s)
- Alejandro Raúl Schmidt
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Pablo Ignacio Felipe Inserra
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Santiago Andrés Cortasa
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Sofía Proietto
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Victoria Fidel
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Alfredo Daniel Vitullo
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Verónica Berta Dorfman
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| |
Collapse
|
6
|
Miyazawa K, Pastori D, Martin D, Choucair W, Halperin J, Lip G. Characteristics of patients with atrial high rate episodes detected by implanted defibrillator and resynchronisation devices. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0463] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Aims
Atrial high rate episodes (AHRE) are associated with increased risks of thromboembolism and cardiovascular mortality. However, the clinical characteristics of patients developing AHRE of various durations are not well studied.
Methods
This was an ancillary analysis of the multicenter, randomized IMPACT trial. In the present analysis, we classified patients according to duration of AHRE ≤6 minutes, >6 minutes to ≤6 hours, >6 hours to ≤24 hours and >24 hours, and investigated the association between clinical factors and the development of each duration of AHRE.
Results
Of 2,718 patients included in the trial, 945 (34.8%) developed AHRE. The incidence rates of each AHRE duration category were 10.7, 24.0, 0.14, and 0.07%, respectively. Using Cox regression analysis, heart failure was inversely associated with AHRE <6 minutes (hazard ratio [HR] 0.58, 95% confidence interval [CI] 0.40–0.85, p=0.005), while age ≥65 years and history of atrial fibrillation (AF) and/or atrial flutter (AFL) were risk factors for AHRE >6 minutes. Female gender was inversely associated with AHRE >6 minutes to ≤6 hours (HR 0.72, 95% CI 0.54–0.96, p=0.027) and >6 hours to ≤24 hours (HR 0.70, 95% CI 0.49–1.02, p=0.061). Hypertension was associated with AHRE >24 hours (HR 2.13, 95% CI 1.24–3.65, p=0.006).
Conclusion
AHRE >6 minutes to ≤6 hours were most prevalent among all AHRE duration categories. Age and history of AF/AFL were risk factors for AHRE >6 minutes. Women were at lower risk for AHRE >6 minutes to ≤24 hours, while hypertension was associated with AHRE >24 hours.
Funding Acknowledgement
Type of funding sources: None. Cumulative incidence of each AHRE burden
Collapse
Affiliation(s)
- K Miyazawa
- Chiba University Graduate School of Medicine, Department of Cardiovascular Medicine, Chiba, Japan
| | - D Pastori
- Sapienza University of Rome, Rome, Italy
| | - D Martin
- Brigham and Women's Hospital, Boston, United States of America
| | - W Choucair
- Heart and Rhythm institute of South Texas, Texas, United States of America
| | - J Halperin
- Icahn School of Medicine at Mount Sinai, New York, United States of America
| | - G Lip
- University of Liverpool, Liverpool, United Kingdom
| |
Collapse
|
7
|
Cwirenbaum R, Schmidt AR, Cortasa SA, Corso MC, Vitullo AD, Dorfman VB, Halperin J. First record of an infection by tissue cyst-forming coccidia in wild vizcachas ( Lagostomus maximus, Rodentia) of Argentina. Int J Parasitol Parasites Wildl 2021; 16:52-58. [PMID: 34430198 PMCID: PMC8367855 DOI: 10.1016/j.ijppaw.2021.08.002] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 08/04/2021] [Accepted: 08/05/2021] [Indexed: 11/26/2022]
Abstract
Endoparasites of the Sarcocystidae family share the ability to form tissue cysts in their intermediate hosts, ultimately leading to pathogenesis in the definitive hosts that include various mammals, reptiles and birds. In our research on the endocrinology of the female vizcachas (Lagostomus maximus), we have found abnormal cystic structures in the ovaries of some individuals. So far, no cases of infection by tissue cyst-forming parasites have been reported in this species. To evaluate whether this autochthonous wild rodent is an intermediate host of an undescribed endoparasite, histological sections from various organs were examined. Pinhead-sized tissue cysts were found in the ovaries, mammary glands, uterus, pituitary, brain, adrenals and spleen, of both pregnant and non-pregnant females. The presence of cysts in the adult brain and embryonic tissue is indicative of the ability of the parasite to cross both the blood-brain and placental barriers. The infected brains exhibited a lower cyst density than that seen in other organs. Regardless of their location in superficial or deep tissue, the cysts were surrounded by a layer of connective tissue. Histologically, the cyst wall consisted of an outer layer of fibroblasts and collagen fibers, and an inner, granular-looking layer composed of host nucleated cells surrounding thousands of spindle-shaped bradyzoites. Outside the cysts, the host cellular structures showed normal appearance. The remarkable morphological similarities between the cysts studied here with those reported in naturally infected rabbits from an area neighboring the one inhabited by the vizcachas point to Besnoitia sp. as a plausible candidate. More studies will be necessary to confirm the identity of the parasite. Nevertheless, this is the first report of L. maximus as an intermediate host for a tissue cyst-forming coccidia.
Collapse
Affiliation(s)
- Ruth Cwirenbaum
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Hidalgo 775, C1405BCK-Buenos Aires, Argentina
| | - Alejandro R Schmidt
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Hidalgo 775, C1405BCK-Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Santiago A Cortasa
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Hidalgo 775, C1405BCK-Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - María C Corso
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Hidalgo 775, C1405BCK-Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Alfredo D Vitullo
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Hidalgo 775, C1405BCK-Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Verónica B Dorfman
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Hidalgo 775, C1405BCK-Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD) Universidad Maimónides, Hidalgo 775, C1405BCK-Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| |
Collapse
|
8
|
Schmidt AR, Gariboldi MC, Cortasa SA, Proietto S, Corso MC, Inserra PIF, Jaime VS, Halperin J, Vitullo AD, Dorfman VB. Neocortical Anatomy in the South American Plains Vizcacha, Lagostomus maximus, Reveals Different Strategies in Encephalic Development among Hystricomorpha and Myomorpha Rodents. Brain Behav Evol 2021; 95:318-329. [PMID: 33910193 DOI: 10.1159/000515638] [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] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 03/02/2021] [Indexed: 11/19/2022]
Abstract
Depending on the presence or absence of sulci and convolutions, the brains of mammals are classified as gyrencephalic or lissencephalic. We analyzed the encephalic anatomy of the hystricomorph rodent Lagostomus maximus in comparison with other evolutionarily related species. The encephalization quotient (EQ), gyrencephaly index (GI), and minimum cortical thickness (MCT) were calculated for the plains vizcacha as well as for other myomorph and hystricomorph rodents. The vizcacha showed a gyrencephalic brain with a sagittal longitudinal fissure that divides both hemispheres, and 3 pairs of sulci with bilateral symmetry; that is, lateral-rostral, intraparietal, and transverse sulci. The EQ had one of the lowest values among Hystricomorpha, while GI was one of the highest. Besides, the MCT was close to the mean value for the suborder. The comparison of EQ, GI, and MCT values between hystricomorph and myomorph species allowed the detection of significant variations. Both EQ and GI showed a significant increase in Hystricomorpha compared to Myomorpha, whereas a Pearson's analysis between EQ and GI depicted an inverse correlation pattern for Hystricomorpha. Furthermore, the ratio between MCT and GI also showed a negative correlation for Hystricomorpha and Myomorpha. Our phylogenetic analyses showed that Hystricomorpha and Myomorpha do not differ in their allometric patterning between the brain and body mass, GI and brain mass, and MCT and GI. In conclusion, gyrencephalic neuroanatomy in the vizcacha could have developed from the balance between the brain size, the presence of invaginations, and the cortical thickness, which resulted in a mixed encephalization strategy for the species. Gyrencephaly in the vizcacha, as well as in other Hystricomorpha, advocates in favor of the proposal that in the more recently evolved Myomorpha lissencephaly would have arisen from a phenotype reversal process.
Collapse
Affiliation(s)
- Alejandro Raúl Schmidt
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - María Constanza Gariboldi
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina
| | - Santiago Andrés Cortasa
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Sofía Proietto
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - María Clara Corso
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Pablo Ignacio Felipe Inserra
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Vanina Soledad Jaime
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Alfredo Daniel Vitullo
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Verónica Berta Dorfman
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| |
Collapse
|
9
|
Corso MC, Cortasa SA, Schmidt AR, Proietto S, Inserra PIF, Fernández MO, Di Giorgio N, Lux-Lantos V, Vitullo AD, Dorfman VB, Halperin J. Mammary gland-specific regulation of GNRH and GNRH-receptor gene expression is likely part of a local autoregulatory system in female vizcachas (Rodentia: Chinchillidae). Gen Comp Endocrinol 2020; 296:113518. [PMID: 32474048 DOI: 10.1016/j.ygcen.2020.113518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/06/2020] [Accepted: 05/22/2020] [Indexed: 10/24/2022]
Abstract
In addition to key mammotrophic hormones such as the pituitary prolactin (PRL) and the ovarian steroids progesterone and estradiol, there are local factors that modulate the tissue dynamics of the mammary glands during pregnancy and lactation. By immunohistochemistry and RT-PCR, we found local transcription and translation of gonadotropin-releasing hormone (GNRH), GNRH receptor (GNRHR), PRL and PRL receptor (PRLR) in mammary glands of adult vizcachas during pregnancy and lactation. Both GNRH and GNRHR showed a lag between protein expression and gene transcription throughout the gestational period: while the highest transcription levels of these genes were recorded at early-pregnancy, the epithelial immunoexpressions of both showed their maximum during lactation. RIA results corroborated the presence of GNRH in mammary glands at all the analyzed stages and confirmed the maximum amount of this peptide in the lactating group. Significant amounts of GNRH were detected in milk samples as well. Conversely, PRL and PRLR shared similar protein and gene expression profiles, all exhibiting maximum values during lactation. GNRH peptide content in mammary glands of females with sulpiride-induced hyperprolactinemia (HP) was significantly lower than that of control females (CT). Although PRL mRNA levels remained unchanged, there was a marked increase in theα-lactalbumin (LALBA) transcription in mammary glands of HP- vs CT-females. These results suggest that after targeting mammary glands, PRL stimulates the expression of milk protein genes, but also, tempers the local expression of GNRH. Mammary gland-explantssupplemented with a GNRH analogue (GN-explants) had no differences in terms of PRLR orLALBA transcription levels compared to CT-explants, so the mammary PRLR signaling would not appear to be modulated by GNRH. Yet, mRNA expression levels of both GNRH and the GNRHR-downstream factor, EGR1, were significantly higher in GN-explants compared to that of CT which would point to a GNRH-positive feedback mechanism. In summary, the local coupled expression of GNRH, GNRHR and EGR1 in the mammary gland throughout pregnancy of vizcachas, the PRL-dependent mammary GNRH secretion as well as the GNRH positive feedback on its own transcription suggest an autocrine-paracrine regulatory mechanism and propose an active role for GNRH in mammary gland tissue remodeling.
Collapse
Affiliation(s)
- María Clara Corso
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Santiago Andrés Cortasa
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Alejandro Raúl Schmidt
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Sofía Proietto
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Pablo Ignacio Felipe Inserra
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Marina Olga Fernández
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME)-CONICET, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Noelia Di Giorgio
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME)-CONICET, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Victoria Lux-Lantos
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME)-CONICET, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Alfredo Daniel Vitullo
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Verónica Berta Dorfman
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| |
Collapse
|
10
|
Bogdanet D, O'Shea PM, Halperin J, Dunne F. Plasma glycated CD59 (gCD59), a novel biomarker for the diagnosis, management and follow up of women with Gestational Diabetes (GDM) - protocol for prospective cohort study. BMC Pregnancy Childbirth 2020; 20:412. [PMID: 32682411 PMCID: PMC7368790 DOI: 10.1186/s12884-020-03090-9] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 07/03/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The prevalence of Gestational Diabetes (GDM) is rising and with it the number of mothers and children at risk of adverse outcomes. As treatment has been shown to reduce adverse events, it is imperative that we identify all at-risk pregnant women. In Ireland, the national standard of care is selective screening with a 2-hour 75 g oral glucose tolerance test (OGTT). Aiming for universal screening is of utmost importance but this is difficult given the length, the unfeasibility and impracticability of the OGTT. We aim to assess if the novel biomarker glycated CD59 (gCD59) is a suitable contender for the OGTT in identifying women with GDM. METHODS In this prospective cohort study, the study participants will be consecutive pregnant women at Galway University Hospital, Galway, Ireland. Samples for the plasma gCD59 biomarker will be taken together with routine bloods at the first antenatal visit, at weeks 24-28 at the time of routine 75 g OGTT, in trimester 3- and 12-weeks post-partum for women with GDM while having their routine post-partum 75 g OGTT. The constructed database will contain baseline information on each study participant, baseline laboratory data, follow-up laboratory data and pregnancy related outcomes. We aim to recruit a total of 2,000 participants over the project period and with a national GDM prevalence of 12-13%, we will have 240-260 subjects who meet OGTT criteria for GDM. Following regional prevalence, we expect to have 34-37 women who will develop either diabetes or pre-diabetes in the early post-partum period. The sensitivity and specificity of plasma gCD59 to predict the results of the OGTT will be assessed using nonparametric estimates of the receiver operating characteristic (ROC) curves and respective area under the ROC curve (AUROC). DISCUSSION A body of clinical and experimental evidence supports a link between the complement system, complement regulatory proteins, and the pathogenesis of diabetes complications. Building on this research, our study plans to look at the plasma gCD59 capacity to classify pregnant women with normal or abnormal glucose tolerance but also to assess if plasma gCD59 can be used as an early predictor for GDM, for adverse pregnancy outcomes and/or post-partum glucose intolerance.
Collapse
Affiliation(s)
- D Bogdanet
- College of Medicine Nursing and Health Sciences, National University of Ireland Galway, Galway, Ireland. .,Diabetic Day Centre, Galway University Hospital, Galway , Ireland.
| | - P M O'Shea
- Diabetic Day Centre, Galway University Hospital, Galway , Ireland
| | - J Halperin
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, MA, Boston, USA
| | - F Dunne
- College of Medicine Nursing and Health Sciences, National University of Ireland Galway, Galway, Ireland.,Diabetic Day Centre, Galway University Hospital, Galway , Ireland
| |
Collapse
|
11
|
Inserra PIF, Charif SE, Fidel V, Giacchino M, Schmidt AR, Villarreal FM, Proietto S, Cortasa SA, Corso MC, Gariboldi MC, Leopardo NP, Fraunhoffer NA, Di Giorgio NP, Lux-Lantos VA, Halperin J, Vitullo AD, Dorfman VB. The key action of estradiol and progesterone enables GnRH delivery during gestation in the South American plains vizcacha, Lagostomus maximus. J Steroid Biochem Mol Biol 2020; 200:105627. [PMID: 32070756 DOI: 10.1016/j.jsbmb.2020.105627] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 12/02/2019] [Revised: 02/07/2020] [Accepted: 02/09/2020] [Indexed: 11/23/2022]
Abstract
The South American plains vizcacha, Lagostomus maximus, is the only mammal described so far that shows expression of estrogen receptors (ERs) and progesterone receptors (PRs) in gonadotropin-releasing hormone (GnRH) neurons. This animal therefore constitutes an exceptional model for the study of the effect of steroid hormones on the modulation of the hypothalamic-pituitary-ovarian (HPO) axis. By using both in vivo and ex vivo approaches, we have found that pharmacological doses of progesterone (P4) and estradiol (E2) produced an inhibition in the expression of hypothalamic GnRH, while physiological doses produced a differential effect on the pulsatile release frequency or genomic expression of GnRH. Our ex vivo experiment indicates that a short-term effect of E2 modulates the frequency of GnRH release pattern that would be associated with membrane ERs. On the other hand, our in vivo approach suggests that a long-term effect of E2, acting through the classical nuclear ERs-PRs pathway, would produce the modification of GnRH mRNA expression during the GnRH pre-ovulatory surge. Particularly, P4 induced a rise in GnRH mRNA expression and protein release with a decrease in its release frequency. These results suggest different levels of action of steroid hormones on GnRH modulation. We conclude that the fine action of E2 and P4 constitute the key factor to enable the hypothalamic activity during the pregnancy of this mammal.
Collapse
Affiliation(s)
- Pablo I F Inserra
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Santiago E Charif
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Victoria Fidel
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2)
| | - Mariela Giacchino
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Alejandro R Schmidt
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Federico M Villarreal
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2)
| | - Sofía Proietto
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Santiago A Cortasa
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - María C Corso
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - María C Gariboldi
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Noelia P Leopardo
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Nicolás A Fraunhoffer
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Noelia P Di Giorgio
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME)-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Victoria A Lux-Lantos
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME)-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Alfredo D Vitullo
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Verónica B Dorfman
- Centro de Estudios Biomédicos Básicos, Aplicados y Desarrollo (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina(2); Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| |
Collapse
|
12
|
Proietto S, Yankelevich L, Villarreal FM, Inserra PIF, Charif SE, Schmidt AR, Cortasa SA, Corso MC, Di Giorgio NP, Lux-Lantos V, Vitullo AD, Halperin J, Dorfman VB. Pituitary estrogen receptor alpha is involved in luteinizing hormone pulsatility at mid-gestation in the South American plains vizcacha, Lagostomus maximus (Rodentia, Caviomorpha). Gen Comp Endocrinol 2019; 273:40-51. [PMID: 29656043 DOI: 10.1016/j.ygcen.2018.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 12/29/2017] [Revised: 03/22/2018] [Accepted: 04/02/2018] [Indexed: 11/30/2022]
Abstract
The South American plains vizcacha, Lagostomus maximus, is a caviomorph rodent native from Argentina, Bolivia and Paraguay. It shows peculiar reproductive features like pre-ovulatory follicle recruitment during pregnancy with an ovulatory process at around mid-gestation. We have described the activation of the hypothalamic - pituitary - ovarian (HPO) axis during pregnancy. A progressive decrease of progesterone (P4) at mid-pregnancy elicits the delivery of gonadotropin-releasing hormone (GnRH) with the consequent secretion of follicle stimulating hormone (FSH) and estradiol (E2) followed by luteinizing hormone (LH) release resulting in follicular luteinization and the P4 concentration recover. Pituitary gland is the central regulator of the HPO axis being E2 a key hormone involved in the regulation of its activity. In this work we analyzed the action of E2 on the pituitary response to the GnRH wave as well as its involvement on LH secretion at mid-gestation in L. maximus. The expression of GnRHR at the pituitary pars distalis showed a significant decrease at mid-pregnancy compared to early- and term-gestating females. ERα showed a significant increment from mid-gestation whereas ERβ did not show variations throughout pregnancy; whereas the LH expression in the pituitary pars distalis showed a significant increase at mid-gestation, concordantly with serum LH, which was followed by a decrease at term-gestation with similar values than at early-pregnancy. The number of cells with co-localization of ERα and GnRHR showed a decline at mid-pregnancy related to early- and term-gestation, whereas the cells with co-localization of ERα and LH increased at mid- and term-pregnancy. On the other hand, ex vivo measuring of LH pulsatility showed a significant increment in the total mass of LH delivered at mid-pregnancy followed by a decrease at term-gestation. The stimulation of ERα with the PPT specific agonist induced a significant increment in the total mass of LH released, whereas no changes were determined when ERβ was stimulated with its specific agonist MPP. These results suggest that LH pulsatility rise at mid-pregnancy would be enabled by the increase of E2 acting through ERα.
Collapse
Affiliation(s)
- Sofía Proietto
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Lorena Yankelevich
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
| | - Federico Martín Villarreal
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
| | - Pablo Ignacio Felipe Inserra
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Santiago Elías Charif
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Alejandro Raúl Schmidt
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Santiago Andrés Cortasa
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - María Clara Corso
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Noelia Paula Di Giorgio
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME)-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Victoria Lux-Lantos
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME)-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Alfredo Daniel Vitullo
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Verónica Berta Dorfman
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| |
Collapse
|
13
|
Yee MK, Kerneis M, Nafee T, Travis R, Chi G, Mehran R, Wildegoose P, Bode C, Halperin J, Verheugt FW, Lip GYH, Cohen M, Peterson ED, Fox KAA, Gibson CM. 1460Effect of the INR stability characteristics on bleeding events among atrial fibrillation patients undergoing percutaneous coronary intervention: insights from the PIONEER AF-PCI trial. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.1460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M K Yee
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| | - M Kerneis
- Harvard Medical School, Division of Cardiovascular Medicine, Boston, United States of America
| | - T Nafee
- Harvard Medical School, Division of Cardiovascular Medicine, Boston, United States of America
| | - R Travis
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| | - G Chi
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| | - R Mehran
- Mount Sinai Medical Center, Cardiovascular Institute, New York, United States of America
| | - P Wildegoose
- Janssen Pharmaceuticals, Titusville, United States of America
| | - C Bode
- University of Freiburg, Heart Center, Department of Cardiology and Angiology, Freiburg, Germany
| | - J Halperin
- Mount Sinai Medical Center, Cardiovascular Institute, New York, United States of America
| | - F W Verheugt
- Hospital Onze Lieve Vrouwe Gasthuis, Amsterdam, Netherlands
| | - G Y H Lip
- Birmingham City Hospital, Birmingham, United Kingdom
| | - M Cohen
- Newark Beth Israel Medical Center, Newark, United States of America
| | - E D Peterson
- Duke Clinical Research Institute, Durham, United States of America
| | - K A A Fox
- Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - C M Gibson
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| |
Collapse
|
14
|
Nafee T, Yee MK, Kerneis M, Travis R, Alkhalfan F, Mehran R, Halperin J, Bode C, Wildgoose P, Cohen M, Verheugt FW, Lip GYH, Peterson ED, Fox KAA, Gibson CM. P5139Identification of atrial fibrillation patients who are at high bleeding risk after undergoing percutaneous coronary intervention: insights from the PIONEER AF-PCI trial. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T Nafee
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| | - M K Yee
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| | - M Kerneis
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| | - R Travis
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| | - F Alkhalfan
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| | - R Mehran
- Mount Sinai Medical Center, New York, United States of America
| | - J Halperin
- Mount Sinai Medical Center, New York, United States of America
| | - C Bode
- University of Freiburg, Freiburg, Germany
| | - P Wildgoose
- Janssen Pharmaceuticals, Titusville, United States of America
| | - M Cohen
- Newark Beth Israel Medical Center, Newark, United States of America
| | - F W Verheugt
- Hospital Onze Lieve Vrouwe Gasthuis, Amsterdam, Netherlands
| | - G Y H Lip
- Birmingham City Hospital, Birmingham, United Kingdom
| | - E D Peterson
- Duke Clinical Research Institute, Durham, United States of America
| | - K A A Fox
- Birmingham City Hospital, Birmingham, United Kingdom
| | - C M Gibson
- Beth Israel Deaconess Medical Center, Division of Cardiovascular Medicine, Boston, United States of America
| |
Collapse
|
15
|
Proietto S, Cortasa SA, Corso MC, Inserra PIF, Charif SE, Schmidt AR, Di Giorgio NP, Lux-Lantos V, Vitullo AD, Dorfman VB, Halperin J. Prolactin Is a Strong Candidate for the Regulation of Luteal Steroidogenesis in Vizcachas ( Lagostomus maximus). Int J Endocrinol 2018; 2018:1910672. [PMID: 30013596 PMCID: PMC6022330 DOI: 10.1155/2018/1910672] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 04/20/2018] [Accepted: 05/07/2018] [Indexed: 12/11/2022] Open
Abstract
Prolactin (PRL) is essential for the maintenance of the corpora lutea and the production of progesterone (P4) during gestation of mice and rats, which makes it a key factor for their successful reproduction. Unlike these rodents and the vast majority of mammals, female vizcachas (Lagostomus maximus) have a peculiar reproductive biology characterized by an ovulatory event during pregnancy that generates secondary corpora lutea with a consequent increment of the circulating P4. We found that, although the expression of pituitary PRL increased steadily during pregnancy, its ovarian receptor (PRLR) reached its maximum in midpregnancy and drastically decreased at term pregnancy. The luteinizing hormone receptor (LHR) exhibited a similar profile than PRLR. Maximum P4 and LH blood levels were recorded at midpregnancy as well. Remarkably, the P4-sinthesizing enzyme 3β-HSD accompanied the expression pattern of PRLR/LHR throughout gestation. Instead, the luteolytic enzyme 20α-HSD showed low expression at early and midpregnancy, but reached its maximum at the end of gestation, when PRLR/LHR/3ß-HSD expressions and circulating P4 were minimal. In conclusion, both the PRLR and LHR expressions in the ovary would define the success of gestation in vizcachas by modulating the levels of 20α-HSD and 3ß-HSD, which ultimately determine the level of serum P4 throughout gestation.
Collapse
Affiliation(s)
- S. Proietto
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - S. A. Cortasa
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - M. C. Corso
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - P. I. F. Inserra
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - S. E. Charif
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - A. R. Schmidt
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - N. P. Di Giorgio
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME), Ciudad Autónoma de Buenos Aires, Argentina
| | - V. Lux-Lantos
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
- Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental (IByME), Ciudad Autónoma de Buenos Aires, Argentina
| | - A. D. Vitullo
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - V. B. Dorfman
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - J. Halperin
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| |
Collapse
|
16
|
Charif SE, Inserra PIF, Schmidt AR, Di Giorgio NP, Cortasa SA, Gonzalez CR, Lux-Lantos V, Halperin J, Vitullo AD, Dorfman VB. Local production of neurostradiol affects gonadotropin-releasing hormone (GnRH) secretion at mid-gestation in Lagostomus maximus (Rodentia, Caviomorpha). Physiol Rep 2017; 5:5/19/e13439. [PMID: 29038356 PMCID: PMC5641931 DOI: 10.14814/phy2.13439] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 08/17/2017] [Indexed: 01/07/2023] Open
Abstract
Females of the South American plains vizcacha, Lagostomus maximus, show peculiar reproductive features such as massive polyovulation up to 800 oocytes per estrous cycle and an ovulatory process around mid‐gestation arising from the reactivation of the hypothalamic–hypophyseal–ovary (H.H.O.) axis. Estradiol (E2) regulates gonadotropin‐releasing hormone (GnRH) expression. Biosynthesis of estrogens results from the aromatization of androgens by aromatase, which mainly occurs in the gonads, but has also been described in the hypothalamus. The recently described correlation between GnRH and ERα expression patterns in the hypothalamus of the vizcacha during pregnancy, with coexpression in the same neurons of the medial preoptic area, suggests that hypothalamic synthesis of E2 may affect GnRH neurons and contribute with systemic E2 to modulate GnRH delivery during the gestation. To elucidate this hypothesis, hypothalamic expression and the action of aromatase on GnRH release were evaluated in female vizcachas throughout pregnancy. Aromatase and GnRH expression was increased significantly in mid‐pregnant and term‐pregnant vizcachas compared to early‐pregnant and nonpregnant females. In addition, aromatase and GnRH were colocalized in neurons of the medial preoptic area of the hypothalamus throughout gestation. The blockage of the negative feedback of E2 induced by the inhibition of aromatase resulted in a significant increment of GnRH‐secreted mass by hypothalamic explants. E2 produced in the same neurons as GnRH may drive intracellular E2 to higher levels than those obtained from systemic circulation alone. This may trigger for a prompt GnRH availability enabling H.H.O. activity at mid‐gestation with ovulation and formation of accessory corpora lutea with steroidogenic activity that produce the necessary progesterone to maintain gestation to term and guarantee the reproductive success.
Collapse
Affiliation(s)
- Santiago E Charif
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Pablo I F Inserra
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Alejandro R Schmidt
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Noelia P Di Giorgio
- Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina.,Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental, IByME-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Santiago A Cortasa
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Candela R Gonzalez
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Victoria Lux-Lantos
- Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina.,Laboratorio de Neuroendocrinología, Instituto de Biología y Medicina Experimental, IByME-CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Julia Halperin
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Alfredo Daniel Vitullo
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| | - Verónica B Dorfman
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina .,Consejo Nacional de Investigaciones Científicas y Técnicas CONICET, Ciudad Autónoma de Buenos Aires, Argentina
| |
Collapse
|
17
|
Gibson C, Arbetter D, Jain P, Mehran R, Bode C, Halperin J, Verheugt F, Wildgoose P, Eickels M, Korjian S, Daaboul Y, Lip G, Cohen M, Peterson E, Fox K. P3590Rivaroxaban strategies improve the number of days patients remain out of the hospital and event free: A PIONEER substudy. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3590] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
18
|
Pinto D, Tamez H, Korjian S, Daaboul Y, Mehran R, Bode C, Halperin J, Verheugt F, Wildgoose P, Eickels M, Lip G, Cohen M, Peterson E, Fox K, Gibson C. P4569Rivaroxaban treatment strategies reduce costs associated with rehospitalizations due to bleeding and cardiovascular events: results from the PIONEER AF-PCI trial. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4569] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
19
|
Chi G, Korjian S, Daaboul Y, Nafee T, Mehran R, Bode C, Halperin J, Verheugt F, Wildgoose P, Eickels M, Lip G, Cohen M, Peterson E, Fox K, Gibson C. P6112Effect of procedure and lesion characteristics on bleeding and ischemic outcomes among atrial fibrillation patients undergoing percutaneous coronary intervention: results from the PIONEER AF-PCI trial. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6112] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
20
|
Yee M, Chi G, Jain P, Mehran R, Bode C, Halperin J, Verheugt F, Wildgoose P, Korjian S, Daaboul Y, Lip G, Cohen M, Peterson E, Fox K, Gibson C. P4565Rivaroxaban treatment strategies reduce not only the first bleeding event, but all (including multiple) bleeding events: A PIONEER Substudy. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4565] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
21
|
Dubner SJ, Huisman MV, Diener HC, Halperin J, Rothman KJ, Ma CS, Zint K, Riou Franca L, Lu S, Teutsch C, Paquette M, Lip GYH. P281Baseline characteristics of patients with atrial fibrillation with and without comorbid heart failure: the GLORIA-AF registry. Europace 2017. [DOI: 10.1093/ehjci/eux141.009] [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: 11/14/2022] Open
|
22
|
Affiliation(s)
- R. L. Macklin
- Oak Ridge National Laboratory, P.O. Box X Oak Ridge, Tennessee 37830
| | - R. W. Ingle
- Oak Ridge National Laboratory, P.O. Box X Oak Ridge, Tennessee 37830
| | - J. Halperin
- Oak Ridge National Laboratory, P.O. Box X Oak Ridge, Tennessee 37830
| |
Collapse
|
23
|
Affiliation(s)
- C. E. Bemis
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| | - R. E. Druschel
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| | - J. Halperin
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| |
Collapse
|
24
|
Affiliation(s)
- R. L. Macklin
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| | - J. Halperin
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| | - R. R. Winters
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| |
Collapse
|
25
|
Affiliation(s)
- R. B. Perez
- Oak Ridge National Laboratory, P.O. Box X Oak Ridge, Tennessee 37830
| | - G. de Saussure
- Oak Ridge National Laboratory, P.O. Box X Oak Ridge, Tennessee 37830
| | - R. L. Macklin
- Oak Ridge National Laboratory, P.O. Box X Oak Ridge, Tennessee 37830
| | - J. Halperin
- Oak Ridge National Laboratory, P.O. Box X Oak Ridge, Tennessee 37830
| | - N. W. Hill
- Oak Ridge National Laboratory, P.O. Box X Oak Ridge, Tennessee 37830
| |
Collapse
|
26
|
Affiliation(s)
- J. Halperin
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | | | | |
Collapse
|
27
|
Affiliation(s)
| | - J. Halperin
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| |
Collapse
|
28
|
Affiliation(s)
- J. Halperin
- Chemistry Division Oak Ridge National Laboratory Oak Ridge, Tennessee
| | - C. R. Baldock
- Chemistry Division Oak Ridge National Laboratory Oak Ridge, Tennessee
| | - J. H. Oliver
- Chemistry Division Oak Ridge National Laboratory Oak Ridge, Tennessee
| |
Collapse
|
29
|
Stoughton RW, Halperin J. Heavy Nuclide Cross Sections of Particular Interest to Thermal Reactor Operation: Conventions, Measurements and Preferred Values. NUCL SCI ENG 2017. [DOI: 10.13182/nse59-a25640] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - J. Halperin
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| |
Collapse
|
30
|
Affiliation(s)
- R. L. Macklin
- Oak Ridge National Laboratory, P. O Box X, Oak Ridge, Tennessee 37830
| | - J. A. Harvey
- Oak Ridge National Laboratory, P. O Box X, Oak Ridge, Tennessee 37830
| | - J. Halperin
- Oak Ridge National Laboratory, P. O Box X, Oak Ridge, Tennessee 37830
| | - N. W. Hill
- Oak Ridge National Laboratory, P. O Box X, Oak Ridge, Tennessee 37830
| |
Collapse
|
31
|
Affiliation(s)
- J. Halperin
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | | | | | | |
Collapse
|
32
|
Affiliation(s)
- R. L. Macklin
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| | - J. Halperin
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| |
Collapse
|
33
|
Halperin J, Johnston FJ, Stoughton RW, Oliver JH, Blevins EL, Druschel RE, Harkness AL, Swarz BA. The Average Capture/Fission Ratio of U233for Epithermal Neutrons. NUCL SCI ENG 2017. [DOI: 10.13182/nse63-a26510] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- J. Halperin
- Chemistry Division, Oak Ridge National Laboratory Oak Ridge, Tennessee
| | - F. J. Johnston
- Chemistry Division, Oak Ridge National Laboratory Oak Ridge, Tennessee
| | - R. W. Stoughton
- Chemistry Division, Oak Ridge National Laboratory Oak Ridge, Tennessee
| | - J. H. Oliver
- Chemistry Division, Oak Ridge National Laboratory Oak Ridge, Tennessee
| | - E. L. Blevins
- Chemistry Division, Oak Ridge National Laboratory Oak Ridge, Tennessee
| | - R. E. Druschel
- Chemistry Division, Oak Ridge National Laboratory Oak Ridge, Tennessee
| | - A. L. Harkness
- Chemistry Division, Oak Ridge National Laboratory Oak Ridge, Tennessee
| | - B. A. Swarz
- Chemistry Division, Oak Ridge National Laboratory Oak Ridge, Tennessee
| |
Collapse
|
34
|
Halperin J, Bemis CE, Dabbs JWT, Ketelle BH, Stoughton RW, Hoff RW, Dougan RJ. Prompt Neutron Multiplicity Distribution in the Spontaneous Fission of Curium-242. NUCL SCI ENG 2017. [DOI: 10.13182/nse80-a20317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- J. Halperin
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| | - C. E. Bemis
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| | - J. W. T. Dabbs
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| | - B. H. Ketelle
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| | - R. W. Stoughton
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37830
| | - R. W. Hoff
- Lawrence Livermore Laboratory, Livermore, California 94550
| | - R. J. Dougan
- Lawrence Livermore Laboratory, Livermore, California 94550
| |
Collapse
|
35
|
Affiliation(s)
- C. E. Bemis
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| | - R. E. Druschel
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| | - J. Halperin
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| | - J. R. Walton
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| |
Collapse
|
36
|
Affiliation(s)
| | - J. Halperin
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | | |
Collapse
|
37
|
Affiliation(s)
| | - J. Halperin
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| | - C. E. Bemis
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| | - H. W. Schmitt
- Oak Ridge National Laboratory Oak Ridge, Tennessee 37830
| |
Collapse
|
38
|
Affiliation(s)
- R. L. Macklin
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37830
| | - J. Halperin
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37830
| |
Collapse
|
39
|
Affiliation(s)
- J. Halperin
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
| | - C. E. Bemis
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
| | - R. E. Druschel
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
| | - J. R. Stokely
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
| |
Collapse
|
40
|
Affiliation(s)
- C. E. Bemis
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37830
| | - J. H. Oliver
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37830
| | - R. Eby
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37830
| | - J. Halperin
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37830
| |
Collapse
|
41
|
Affiliation(s)
- J. Halperin
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37831
| | - G. D. O'Kelley
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37831
| | - J. H. Oliver
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37831
| | - J. E. Bigelow
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37831
| | - J. T. Wiggins
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, Tennessee 37831
| |
Collapse
|
42
|
Affiliation(s)
- J. Halperin
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
| | | | | | | | | |
Collapse
|
43
|
Affiliation(s)
- R. W. Stoughton
- Oak Ridge National Laboratory, Chemistry Division, Oak Ridge, Tennessee
| | - J. Halperin
- Oak Ridge National Laboratory, Chemistry Division, Oak Ridge, Tennessee
| |
Collapse
|
44
|
Affiliation(s)
- C. W. Alexander
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37831
| | - J. Halperin
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37831
| | - J. B. Knauer
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37831
| | - R. L. Walker
- Oak Ridge National Laboratory, P. O. Box X, Oak Ridge, Tennessee 37831
| |
Collapse
|
45
|
Lip G, Huisman M, Diener HC, Dubner S, Ma C, Rothman K, Healey J, Schoof N, Teutsch C, Halperin J. OC11_04 Antithrombotic Therapy in Relation to Symptoms in Patients With Atrial Fibrillation: Observations From The Gloria-AF Registry Program. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.050] [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: 10/21/2022] Open
|
46
|
Halperin J, Huisman M, Diener HC, Dubner S, Ma C, Rothman K, Healey J, Zint K, Teutsch C, Lip G. PM198 Antithrombotic Treatment in Relation to Age and Stroke Risk in Patients With Newly Diagnosed Atrial Fibrillation (Gloria-AF Phase II). Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.358] [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: 11/15/2022] Open
|
47
|
Buller HR, Halperin J, Hankey GJ, Pillion G, Prins MH, Raskob GE. Comparison of idrabiotaparinux with vitamin K antagonists for prevention of thromboembolism in patients with atrial fibrillation: the Borealis-Atrial Fibrillation Study. J Thromb Haemost 2014; 12:824-30. [PMID: 24597472 DOI: 10.1111/jth.12546] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 09/26/2013] [Indexed: 11/30/2022]
Abstract
BACKGROUND Idrabiotaparinux, a long-acting inhibitor of factor Xa, was shown to be effective in the treatment of patients with venous thromboembolism. OBJECTIVE To assess non-inferiority for the efficacy of idrabiotaparinux versus warfarin in patients with atrial fibrillation (AF) at risk of stroke and systemic embolism. Bleeding was also assessed. METHODS This randomized, double-blind trial enrolled patients with electrocardiogram-documented AF. Idrabiotaparinux was administered weekly via subcutaneous injection, and warfarin was administered daily with dose adjustment to maintain the international normalized ratio between 2.0 and 3.0. Each idrabiotaparinux injection was 3 mg for the first 7 weeks, followed by 2 mg thereafter, except in patients with a creatinine clearance of 30-50 mL min(-1) or aged ≥ 75 years. The patients received 1.5 mg after the first 7 weeks. The efficacy outcome was the composite of all fatal or non-fatal strokes and systemic embolism. The safety outcome was clinically relevant bleeding (major and clinically relevant non-major bleeding). RESULTS The study was terminated prematurely by the sponsor for strategic/commercial, not scientific, reasons, with 39% of the planned number of patients included and an average duration of treatment of 240 days. Of the 1886 idrabiotaparinux recipients, 20 developed stroke or systemic embolism (1.5% per year), whereas this occurred in 22 of the 1887 warfarin patients (1.6% per year, hazard ratio 0.98, 95% confidence interval 0.49-1.66). The annual incidence of bleeding was 6.1% in the idrabiotaparinux and 10.0% in the warfarin group (hazard ratio 0.61, 95% confidence interval 0.46-0.81). CONCLUSION If anything, despite its early termination, the idrabiotaparinux regimen studied suggested a comparable efficacy to dose-adjusted warfarin, with a lower bleeding risk.
Collapse
Affiliation(s)
- H R Buller
- Department of Vascular Medicine, Academic Medical Center, Amsterdam, the Netherlands
| | | | | | | | | | | |
Collapse
|
48
|
Jalota A, Scarabelli TM, Saravolatz L, Bakhsh MU, Agrawal P, Jalota R, Chen-Scarabelli C, Fuster V, Halperin J. Novel Anticoagulants for Stroke Prevention in Patients with Atrial Fibrillation. Cardiovasc Drugs Ther 2014; 28:247-62. [DOI: 10.1007/s10557-014-6524-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
49
|
Sangeeta Devi Y, Halperin J. Reproductive actions of prolactin mediated through short and long receptor isoforms. Mol Cell Endocrinol 2014; 382:400-410. [PMID: 24060636 DOI: 10.1016/j.mce.2013.09.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [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: 05/01/2013] [Revised: 07/20/2013] [Accepted: 09/13/2013] [Indexed: 10/26/2022]
Abstract
Prolactin (PRL) is a polypeptide hormone with a wide range of physiological functions, and is critical for female reproduction. PRL exerts its action by binding to membrane bound receptor isoforms broadly classified as the long form and the short form receptors. Both receptor isoforms are highly expressed in the ovary as well as in the uterus. Although signaling through the long form is believed to be more predominant, it remains unclear whether activation of this isoform alone is sufficient to support reproductive functions or whether both types of receptor are required. The generation of transgenic mice selectively expressing either the short or the long form of PRL receptor has provided insight into the differential signaling mechanisms and physiological functions of these receptors. This review describes the essential finding that both long and short receptor isoforms are crucial for ovarian functions and female fertility, and highlights novel mechanisms of action for these receptors.
Collapse
Affiliation(s)
- Y Sangeeta Devi
- Department of Obstetrics, Gynecology and Reproductive Biology, College of Human Medicine, Michigan State University, Grand Rapids, MI-49503, USA.
| | - Julia Halperin
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Hidalgo 775 6to piso, C1405BCK Ciudad Autónoma de Buenos Aires, Argentina and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Rivadavia 1917, Ciudad Autónoma de Buenos Aires, Argentina.
| |
Collapse
|
50
|
Jones WS, Hellkamp AS, Halperin J, Piccini JP, Breithardt G, Singer DE, Fox KAA, Hankey GJ, Mahaffey KW, Califf RM, Patel MR. Efficacy and safety of rivaroxaban compared with warfarin in patients with peripheral artery disease and non-valvular atrial fibrillation: insights from ROCKET AF. Eur Heart J 2013; 35:242-9. [DOI: 10.1093/eurheartj/eht492] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|