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Updates on Neuroendocrine Research in Health and Disease

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Neurobiology".

Deadline for manuscript submissions: closed (15 March 2023) | Viewed by 5365

Special Issue Editor


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Guest Editor
Department of Medicine, Surgery and Neuroscience, University of Siena, 53100 Siena, Italy
Interests: neuroscience; diffused neuroendocrine system (DNS); neuropeptide; hormone signaling; neuroendocrine

Special Issue Information

Dear Colleagues,

Neuroendocrinology emerged as a new science in the middle of the 20th century after the discovery that the brain itself can act as an endocrine organ due to its ability to produce hormones, called neurohormones. The neuroendocrine system plays a complex and multifaceted role in the maintenance of homeostasis. In this homeostatic function are involved many brain structures, including the hypothalamus, the anterior pituitary, and an end-organ or target tissues functioning together as an axis, regulated by short or long-loop feedback systems. The neuroendocrine system is made up of special cells called neuroendocrine cells, spread throughout the body, able to receive messages from the nervous system and respond by making and releasing hormones determining the physiologic responses to environmental stimuli. Traditionally, this field has relied on behavioral, hormonal and nervous changes as the “read-outs” elicited by the manipulations of endocrine signals.

In the recent years many of the neuroendocrine studies have been focused on the Diffused Neuroendocrine System (DNS), a heterogeneous group of specialized cells, of various embriologic origins, that works by the integration of different structures such as the endocrine pancreas, the anterior pituitary, the adrenals, acting as a regulatory organ. The anatomical, embriologic and functional differences among these cells can explain the heterogeneity of their pathologies. To this heterogeneity corresponds a variety of neuroendocrine tumors, and research on this field has markedly increased, with particular efforts to find early biomarkers of pathogenicity.

This Special Issue is focused on Neuroendocrine Research in Health and Disease, and it would include original articles on both physiological and pathological aspects related with alterations of the Neuroendocrine system.

Dr. Ilaria Ceccarelli 
Guest Editor

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Published Papers (3 papers)

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Research

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17 pages, 9027 KiB  
Article
Insulin-like Growth Factor 1, Growth Hormone, and Anti-Müllerian Hormone Receptors Are Differentially Expressed during GnRH Neuron Development
by Alyssa J. J. Paganoni, Rossella Cannarella, Roberto Oleari, Federica Amoruso, Renata Antal, Marco Ruzza, Chiara Olivieri, Rosita A. Condorelli, Sandro La Vignera, Fationa Tolaj, Anna Cariboni, Aldo E. Calogero and Paolo Magni
Int. J. Mol. Sci. 2023, 24(17), 13073; https://doi.org/10.3390/ijms241713073 - 22 Aug 2023
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Abstract
Gonadotropin-releasing hormone (GnRH) neurons are key neuroendocrine cells in the brain as they control reproduction by regulating hypothalamic-pituitary-gonadal axis function. In this context, anti-Müllerian hormone (AMH), growth hormone (GH), and insulin-like growth factor 1 (IGF1) were shown to improve GnRH neuron migration and [...] Read more.
Gonadotropin-releasing hormone (GnRH) neurons are key neuroendocrine cells in the brain as they control reproduction by regulating hypothalamic-pituitary-gonadal axis function. In this context, anti-Müllerian hormone (AMH), growth hormone (GH), and insulin-like growth factor 1 (IGF1) were shown to improve GnRH neuron migration and function in vitro. Whether AMH, GH, and IGF1 signaling pathways participate in the development and function of GnRH neurons in vivo is, however, currently still unknown. To assess the role of AMH, GH, and IGF1 systems in the development of GnRH neuron, we evaluated the expression of AMH receptors (AMHR2), GH (GHR), and IGF1 (IGF1R) on sections of ex vivo mice at different development stages. The expression of AMHR2, GHR, and IGF1R was assessed by immunofluorescence using established protocols and commercial antibodies. The head sections of mice were analyzed at E12.5, E14.5, and E18.5. In particular, at E12.5, we focused on the neurogenic epithelium of the vomeronasal organ (VNO), where GnRH neurons, migratory mass cells, and the pioneering vomeronasal axon give rise. At E14.5, we focused on the VNO and nasal forebrain junction (NFJ), the two regions where GnRH neurons originate and migrate to the hypothalamus, respectively. At E18.5, the median eminence, which is the hypothalamic area where GnRH is released, was analyzed. At E12.5, double staining for the neuronal marker ß-tubulin III and AMHR2, GHR, or IGF1R revealed a signal in the neurogenic niches of the olfactory and VNO during early embryo development. Furthermore, IGF1R and GHR were expressed by VNO-emerging GnRH neurons. At E14.5, a similar expression pattern was found for the neuronal marker ß-tubulin III, while the expression of IGF1R and GHR began to decline, as also observed at E18.5. Of note, hypothalamic GnRH neurons labeled for PLXND1 tested positive for AMHR2 expression. Ex vivo experiments on mouse sections revealed differential protein expression patterns for AMHR2, GHR, and IGF1R at any time point in development between neurogenic areas and hypothalamic compartments. These findings suggest a differential functional role of related systems in the development of GnRH neurons. Full article
(This article belongs to the Special Issue Updates on Neuroendocrine Research in Health and Disease)
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16 pages, 904 KiB  
Article
Renal Disturbances during and after Radioligand Therapy of Neuroendocrine Tumors—Extended Analysis of Potential Acute and Chronic Complications
by Marek Saracyn, Adam Daniel Durma, Barbara Bober, Arkadiusz Lubas, Maciej Kołodziej, Waldemar Kapusta, Beata Dmochowska and Grzegorz Kamiński
Int. J. Mol. Sci. 2023, 24(8), 7508; https://doi.org/10.3390/ijms24087508 - 19 Apr 2023
Cited by 2 | Viewed by 1095
Abstract
Neuroendocrine tumors (NEN) are a group of neoplasms that arise from hormonal and neural cells. Despite a common origin, their clinical symptoms and outcomes are varied. They are most commonly localized in the gastrointestinal tract. Targeted radioligand therapy (RLT) is a treatment option [...] Read more.
Neuroendocrine tumors (NEN) are a group of neoplasms that arise from hormonal and neural cells. Despite a common origin, their clinical symptoms and outcomes are varied. They are most commonly localized in the gastrointestinal tract. Targeted radioligand therapy (RLT) is a treatment option which has proven to be successful in recent studies. However, the possible outcomes and true safety profile of the treatment need to be fully determined, especially by new, more sensitive methods. Our study aimed to present an extended analysis of acute and chronic renal complications during and after radioligand therapy using, for the first time in the literature, innovative and complex renal parameters. Forty patients with neuroendocrine tumors underwent four courses of radioligand therapy with [177Lu]Lu-DOTATATE or [177Lu]Lu/[90Y]Y-DOTATATE. Radioisotopes were administrated in intervals of 8–12 weeks, with concurrent intravenous nephroprotection. New detailed and sensitive renal parameters were used to determine the renal safety profile during and after radioisotope therapy for standard treatment of NEN. During the first and fourth courses of RLT, no change in the glomerular filtration rate (GFR) was observed. However, long-term observations one year after the treatment showed a 10% reduction in the GFR. During the first course of treatment, the fractional urea and calcium excretions increased, while the fractional potassium concentration decreased. The fractional calcium excretion remained highly increased in long-term observations. Decreases in urine IL-18, KIM-1 and albumin concentrations were observed during RLT. The concentrations of IL-18 and KIM-1 remained low even a year after therapy. The ultrasound parameters of renal perfusion changed during treatment, before partially returning to the baseline one year after therapy, and were correlated with the biochemical parameters of renal function. A permanent increase in diastolic blood pressure was correlated with the decrease in the GFR observed during the study. In this innovative and complex renal assessment during and after RLT, we found a permanent 10% per year decrease in the GFR and noticeable disturbances in renal tubule function. The diastolic blood pressure also increased. Full article
(This article belongs to the Special Issue Updates on Neuroendocrine Research in Health and Disease)
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Review

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18 pages, 2107 KiB  
Review
Vasopressin as a Possible Link between Sleep-Disturbances and Memory Problems
by Bibiána Török, János Varga and Dóra Zelena
Int. J. Mol. Sci. 2022, 23(24), 15467; https://doi.org/10.3390/ijms232415467 - 7 Dec 2022
Cited by 3 | Viewed by 2832
Abstract
Normal biological rhythms, including sleep, are very important for a healthy life and their disturbance may induce—among other issues—memory impairment, which is a key problem of many psychiatric pathologies. The major brain center of circadian regulation is the suprachiasmatic nucleus, and vasopressin (AVP), [...] Read more.
Normal biological rhythms, including sleep, are very important for a healthy life and their disturbance may induce—among other issues—memory impairment, which is a key problem of many psychiatric pathologies. The major brain center of circadian regulation is the suprachiasmatic nucleus, and vasopressin (AVP), which is one of its main neurotransmitters, also plays a key role in memory formation. In this review paper, we aimed to summarize our knowledge on the vasopressinergic connection between sleep and memory with the help of the AVP-deficient Brattleboro rat strain. These animals have EEG disturbances with reduced sleep and impaired memory-boosting theta oscillation and show memory impairment in parallel. Based upon human and animal data measuring AVP levels, haplotypes, and the administration of AVP or its agonist or antagonist via different routes (subcutaneous, intraperitoneal, intracerebroventricular, or intranasal), V1a receptors (especially of hippocampal origin) were implicated in the sleep-memory interaction. All in all, the presented data confirm the possible connective role of AVP between biological rhythms and memory formation, thus, supporting the importance of AVP in several psychopathological conditions. Full article
(This article belongs to the Special Issue Updates on Neuroendocrine Research in Health and Disease)
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