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1.
Eur J Endocrinol ; 190(4): 284-295, 2024 Mar 30.
Article in English | MEDLINE | ID: mdl-38584335

ABSTRACT

OBJECTIVE: Glucocorticoid resistance is a rare endocrine disease caused by variants of the NR3C1 gene encoding the glucocorticoid receptor (GR). We identified a novel heterozygous variant (GRR569Q) in a patient with uncommon reversible glucocorticoid resistance syndrome. METHODS: We performed ex vivo functional characterization of the variant in patient fibroblasts and in vitro through transient transfection in undifferentiated HEK 293T cells to assess transcriptional activity, affinity, and nuclear translocation. We studied the impact of the variant on the tertiary structure of the ligand-binding domain through 3D modeling. RESULTS: The patient presented initially with an adrenal adenoma with mild autonomous cortisol secretion and undetectable adrenocorticotropin hormone (ACTH) levels. Six months after surgery, biological investigations showed elevated cortisol and ACTH (urinary free cortisol 114 µg/24 h, ACTH 10.9 pmol/L) without clinical symptoms, evoking glucocorticoid resistance syndrome. Functional characterization of the GRR569Q showed decreased expression of target genes (in response to 100 nM cortisol: SGK1 control +97% vs patient +20%, P < .0001) and impaired nuclear translocation in patient fibroblasts compared to control. Similar observations were made in transiently transfected cells, but higher cortisol concentrations overcame glucocorticoid resistance. GRR569Q showed lower ligand affinity (Kd GRWT: 1.73 nM vs GRR569Q: 4.61 nM). Tertiary structure modeling suggested a loss of hydrogen bonds between H3 and the H1-H3 loop. CONCLUSION: This is the first description of a reversible glucocorticoid resistance syndrome with effective negative feedback on corticotroph cells regarding increased plasma cortisol concentrations due to the development of mild autonomous cortisol secretion.


Subject(s)
Glucocorticoids , Metabolism, Inborn Errors , Receptors, Glucocorticoid , Humans , Adrenocorticotropic Hormone/genetics , Glucocorticoids/pharmacology , Glucocorticoids/therapeutic use , Glucocorticoids/metabolism , Hydrocortisone , Ligands , Mutation , Receptors, Glucocorticoid/genetics , Receptors, Glucocorticoid/metabolism , Receptors, Glucocorticoid/deficiency , Syndrome
2.
Eur J Endocrinol ; 190(2): 173-181, 2024 Feb 01.
Article in English | MEDLINE | ID: mdl-38330165

ABSTRACT

IMPORTANCE: A paradoxical increase of growth hormone (GH) following oral glucose load has been described in ∼30% of patients with acromegaly and has been related to the ectopic expression of the glucose-dependent insulinotropic polypeptide (GIP) receptor (GIPR) in somatotropinomas. Recently, we identified germline pathogenic variants and somatic loss of heterozygosity of lysine demethylase 1A (KDM1A) in patients with GIP-dependent primary bilateral macronodular adrenal hyperplasia with Cushing's syndrome. The ectopic expression of GIPR in both adrenal and pituitary lesions suggests a common molecular mechanism. OBJECTIVE: We aimed to analyze KDM1A gene sequence and KDM1A and GIPR expressions in somatotroph pituitary adenomas. SETTINGS: We conducted a cohort study at university hospitals in France and in Italy. We collected pituitary adenoma specimens from acromegalic patients who had undergone pituitary surgery. We performed targeted exome sequencing (gene panel analysis) and array-comparative genomic hybridization on somatic DNA derived from adenomas and performed droplet digital PCR on adenoma samples to quantify KDM1A and GIPR expressions. RESULTS: One hundred and forty-six patients with sporadic acromegaly were studied; 72.6% presented unsuppressed classical GH response, whereas 27.4% displayed a paradoxical rise in GH after oral glucose load. We did not identify any pathogenic variant in the KDM1A gene in the adenomas of these patients. However, we identified a recurrent 1p deletion encompassing the KDM1A locus in 29 adenomas and observed a higher prevalence of paradoxical GH rise (P = .0166), lower KDM1A expression (4.47 ± 2.49 vs 8.56 ± 5.62, P < .0001), and higher GIPR expression (1.09 ± 0.92 vs 0.43 ± 0.51, P = .0012) in adenomas from patients with KDM1A haploinsufficiency compared with those with 2 KDM1A copies. CONCLUSIONS AND RELEVANCE: Unlike in GIP-dependent primary bilateral macronodular adrenal hyperplasia, KDM1A genetic variations are not the cause of GIPR expression in somatotroph pituitary adenomas. Recurrent KDM1A haploinsufficiency, more frequently observed in GIPR-expressing adenomas, could be responsible for decreased KDM1A function resulting in transcriptional derepression on the GIPR locus.


Subject(s)
Acromegaly , Adenoma , Growth Hormone-Secreting Pituitary Adenoma , Human Growth Hormone , Pituitary Neoplasms , Somatotrophs , Humans , Pituitary Neoplasms/pathology , Acromegaly/metabolism , Somatotrophs/metabolism , Somatotrophs/pathology , Comparative Genomic Hybridization , Hyperplasia/pathology , Cohort Studies , Genotype , Growth Hormone-Secreting Pituitary Adenoma/metabolism , Adenoma/pathology , Human Growth Hormone/metabolism , Growth Hormone/metabolism , Glucose , Histone Demethylases/genetics , Histone Demethylases/metabolism
3.
Eur J Endocrinol ; 189(2): 199-207, 2023 Aug 02.
Article in English | MEDLINE | ID: mdl-37549351

ABSTRACT

BACKGROUND: Acromegaly is associated with an increased left ventricular (LV) mass, as reported in echo-based and, more recently, in a few cardiac magnetic resonance imaging (MRI) studies. One possible explanation for this increased LV mass could be water retention and subsequent myocardial edema. METHODS: In this prospective cross-sectional study, 26 patients with active acromegaly before and after treatment and 31 controls of comparable age and sex were investigated using cardiac MRI. Cardiac morphology, function, and myocardial tissue characteristics were evaluated. Myocardial T2 relaxation time was used as the main outcome measure of myocardial edema. The study was registered with clinicaltrials.gov (NCT02948322). RESULTS: Patients compared to controls had greater LV mass indexes (58.1 [54.7-68.6] vs 46.0 [41.3-49.8] g/m2; P < .001) and end-diastolic volume (EDV) indexes (97.3 [88-101.2] vs 81.6 [78.1-96.2] mL/m2; P = .0069) and had comparable global contractile function. T2 values were not different between patients and controls. Both intracellular (43.83 [41.0-50.0] vs 34.32 [28.9-38.7] g/m2; P < .001) and extracellular (15.06 [13.5-17.1] vs 11.6 [10.8-12.7] g/m2; P < .001) LV mass indexes were higher in patients compared to controls. Log growth hormone correlated with myocardial mass (r = 0.75; P < .001). Sex, systolic blood pressure (BP), and the presence of acromegaly were predictors of the LV mass index. The extracellular LV mass index was associated with sex and the presence of acromegaly, whereas the intracellular LV mass index was associated with sex, systolic BP, and high-density lipoprotein (HDL) cholesterol. Acromegaly treatment reduced EDV and total and intracellular LV mass indexes without significantly affecting extracellular mass. CONCLUSION: Acromegaly results in a disease-specific form of LV hypertrophic remodeling, characterized by an increase in both intra- and extracellular mass. The LV mass index and intracellular mass were decreased by treatment.


Subject(s)
Acromegaly , Ventricular Dysfunction, Left , Humans , Acromegaly/complications , Acromegaly/diagnostic imaging , Cross-Sectional Studies , Prospective Studies , Magnetic Resonance Imaging , Edema/complications , Ventricular Dysfunction, Left/complications
4.
Endocr Relat Cancer ; 30(2)2023 02 01.
Article in English | MEDLINE | ID: mdl-36449569

ABSTRACT

Germline mutations in genes encoding succinate dehydrogenase (SDH) are frequently involved in pheochromocytoma/paraganglioma (PPGL) development and were implicated in patients with the '3PAs' syndrome (associating pituitary adenoma (PA) and PPGL) or isolated PA. However, the causality link between SDHx mutation and PA remains difficult to establish, and in vivo tools for detecting hallmarks of SDH deficiency are scarce. Proton magnetic resonance spectroscopy (1H-MRS) can detect succinate in vivo as a biomarker of SDHx mutations in PGL. The objective of this study was to demonstrate the causality link between PA and SDH deficiency in vivo using 1H-MRS as a novel noninvasive tool for succinate detection in PA. Three SDHx-mutated patients suffering from a PPGL and a macroprolactinoma and one patient with an apparently sporadic non-functioning pituitary macroadenoma underwent MRI examination at 3 T. An optimized 1H-MRS semi-LASER sequence (TR = 2500 ms, TE = 144 ms) was employed for the detection of succinate in vivo. Succinate and choline-containing compounds were identified in the MR spectra as single resonances at 2.44 and 3.2 ppm, respectively. Choline compounds were detected in all the tumors (three PGL and four PAs), while a succinate peak was only observed in the three macroprolactinomas and the three PGL of SDHx-mutated patients, demonstrating SDH deficiency in these tumors. In conclusion, the detection of succinate by 1H-MRS as a hallmark of SDH deficiency in vivo is feasible in PA, laying the groundwork for a better understanding of the biological link between SDHx mutations and the development of these tumors.


Subject(s)
Adenoma , Adrenal Gland Neoplasms , Paraganglioma , Pheochromocytoma , Pituitary Neoplasms , Prolactinoma , Humans , Pituitary Neoplasms/genetics , Pituitary Neoplasms/pathology , Mutation , Succinate Dehydrogenase/genetics , Succinate Dehydrogenase/metabolism , Pheochromocytoma/genetics , Paraganglioma/pathology , Adenoma/genetics , Adenoma/pathology , Germ-Line Mutation , Magnetic Resonance Spectroscopy , Adrenal Gland Neoplasms/genetics , Succinic Acid
5.
Front Pharmacol ; 13: 947006, 2022.
Article in English | MEDLINE | ID: mdl-36133827

ABSTRACT

Public health issues related to chronic pain management and the risks of opioid misuse and abuse remain a challenge for practitioners. Data on the prevalence of disorders related to the use of prescribed opioids in patients suffering from chronic pain remains rather patchy, in particular because of the absence of a gold standard for their clinical assessment. We estimated the prevalence of prescription opioid misuse (POM), using a specific and validated opioid misuse scale (POMI-5F scale), in adults with chronic non-cancer pain. Nine-hundred-fifty-one (951) patients with opioids prescription and followed-up in pain clinics and addictology centers for chronic non-cancer pain (CNCP) completed the survey interview. The results suggest that 44.4% of participants have POM, accompanied by overuse (42.5%), use of opioids for effects other than analgesia (30.9%), withdrawal syndrome (65.7%), and craving (6.9%). The motivations cited for POM, apart from pain relief, were to calm down, relax and improve mood. POM was shown to be related to male sex (OR 1.52), young age (OR 2.21) and the presence of nociplastic pain (OR 1.62) of severe intensity (OR 2.31), codeine use (OR 1.72) and co-prescription of benzodiazepines (OR 1.59). Finally, despite the presence of three subgroups of misusers, no factor was associated with the intensity of misuse, reinforcing the view that distinguishing between strong and weak opioids is not appropriate in the context of use disorder. Almost half of patients with CNCP misuse their prescribed opioid. Practitioners should be attentive of profiles of patients at risk of POM, such as young, male patients suffering from severe nociplastic pain, receiving prescription for codeine and a co-prescription for benzodiazepine. We encourage French-speaking practitioners to use the POMI-5F scale to assess the presence of POM in their patients receiving opioid-based therapy. Clinical Trial Registration clinicaltrials.gov, identifier NCT03195374.

7.
J Clin Endocrinol Metab ; 106(12): 3505-3514, 2021 11 19.
Article in English | MEDLINE | ID: mdl-34333603

ABSTRACT

CONTEXT: Cardiovascular disease is the leading cause of death in patients with Cushing syndrome. Cortisol excess and adverse metabolic profile could increase cardiac fat, which can subsequently impair cardiac structure and function. OBJECTIVE: We aimed to evaluate cardiac fat mass and distribution in patients with Cushing syndrome. METHODS: In this prospective, cross-sectional study, 23 patients with Cushing syndrome and 27 control individuals of comparable age, sex, and body mass index were investigated by cardiac magnetic resonance imaging and proton spectroscopy. Patients were explored before and after biochemical disease remission. Myocardial fat measured by the Dixon method was the main outcome measure. The intramyocardial triglyceride/water ratio measured by spectroscopy and epicardial and pericardial fat volumes were secondary outcome measures. RESULTS: No difference was found between patients and controls in intramyocardial lipid content. Epicardial fat mass was increased in patients compared to controls (30.8 g/m2 [20.4-34.8] vs 17.2 g/m2 [13.1-23.5], P < .001). Similarly, pericardial fat mass was increased in patients compared to controls (28.3 g/m2 [17.9-38.0] vs 11.4 g/m2 [7.5-19.4], P = .003). Sex, glycated hemoglobin A1c, and the presence of hypercortisolism were independent determinants of epicardial fat. Pericardial fat was associated with sex, impaired glucose homeostasis and left ventricular wall thickness. Disease remission decreased epicardial fat mass without affecting pericardial fat. CONCLUSION: Intramyocardial fat stores are not increased in patients with Cushing syndrome, despite highly prevalent metabolic syndrome, suggesting increased cortisol-mediated lipid consumption. Cushing syndrome is associated with marked accumulation of epicardial and pericardial fat. Epicardial adiposity may exert paracrine proinflammatory effects promoting cardiomyopathy.


Subject(s)
Adiposity , Body Mass Index , Cardiomyopathies/pathology , Cushing Syndrome/physiopathology , Intra-Abdominal Fat/pathology , Myocardium/pathology , Pericardium/pathology , Adult , Biomarkers/analysis , Blood Glucose/analysis , Cardiomyopathies/epidemiology , Case-Control Studies , Cross-Sectional Studies , Female , Follow-Up Studies , Glycated Hemoglobin/analysis , Humans , Male , Middle Aged , Prognosis , Prospective Studies
8.
Eur J Endocrinol ; 185(1): 99-108, 2021 May 24.
Article in English | MEDLINE | ID: mdl-33914699

ABSTRACT

CONTEXT: Prolactinomas frequently cause amenorrhoea, galactorrhoea and infertility and require dopamine agonist (DA) treatment to normalize prolactin levels and hence, restore ovulation. The vast majority of female patients harbour microprolactinomas in whom DA treatment is usually discontinued at the time of pregnancy diagnosis and surveillance is generally limited as the symptomatic growth is considered very rare. CASE DESCRIPTIONS: We report five cases of women harbouring a microprolactinoma in whom symptomatic pituitary apoplexy occurred during pregnancy. Only one necessitated surgery during pregnancy, while the others were treated conservatively by reintroducing DAs in three. A systematic literature review found reports of four additional cases among 20 cases of prolactinomas (both macro- and micro-prolactinomas) complicated by apoplexy during pregnancy. CONCLUSION: During pregnancy, pituitary apoplexy may occur in pre-existing microprolactinomas, causing tumour enlargement and headache, which may be self-limiting but may require intervention by re-initation of dopamine agonists or surgery. Our literature review confirms that this clinical event is rare; nevertheless, physicians managing pregnant patients with microprolactinomas must be aware that symptomatic pituitary apoplexy may incidentally occur in all trimesters of pregnancy and require prompt radiological, endocrine and ophthalmological assessment and treatment.


Subject(s)
Dopamine Agonists/therapeutic use , Pituitary Apoplexy/drug therapy , Pituitary Neoplasms/drug therapy , Pregnancy Complications, Neoplastic/drug therapy , Prolactinoma/drug therapy , Adult , Bromocriptine/therapeutic use , Cabergoline/therapeutic use , Female , Humans , Pituitary Apoplexy/etiology , Pituitary Apoplexy/surgery , Pituitary Neoplasms/complications , Pituitary Neoplasms/pathology , Pituitary Neoplasms/surgery , Pregnancy , Pregnancy Complications/drug therapy , Pregnancy Complications/etiology , Pregnancy Complications/surgery , Pregnancy Complications, Neoplastic/surgery , Prolactinoma/complications , Prolactinoma/pathology , Prolactinoma/surgery , Tumor Burden , Young Adult
10.
Endocrine ; 71(1): 158-167, 2021 01.
Article in English | MEDLINE | ID: mdl-32986202

ABSTRACT

OBJECTIVE: After surgery, when somatostatin analogs (SAs) do not normalise IGF-I, pegvisomant (PEG) is indicated. Our aim was to define the medical reasons for the treatment of patients with PEG as monotherapy (M) or combined with SA, either as primary bitherapy, PB (PEG is secondarily introduced after SA) or as secondary bitherapy, SB (SAs secondarily introduced after PEG). METHODS: We retrospectively analysed French data from ACROSTUDY. RESULTS: 167, 88 and 57 patients were treated with M, PB or SB, respectively, during a median time of 80, 42 and 70 months. The median PEG dose was respectively 15, 10 and 20 mg. Before PEG, the mean IGF-I level did not differ between M and PB but the proportion of patients with suprasellar tumour extension was higher in PB group (67.5% vs. 44.4%, P = 0.022). SB regimen was used preferentially in patients with tumour increase and IGF-I level difficult to normalise under PEG. In both secondary regimens, the decrease of the frequency of PEG's injections, compared to monotherapy was confirmed. However, the mean weekly dose of PEG between M and PB remained the same. CONCLUSIONS: The medical rationale for continuing SAs rather than switching to PEG alone in patients who do not normalise IGF-I under SAs was a tumour concern with suprasellar extension and tumour shrinkage under SA. A potential explanation for introducing SA in association with PEG appears to be a tumour enlargement and difficulties to normalise IGF-I levels under PEG given alone. In both regimens, the prospect of lowering PEG injection frequency favoured the choice.


Subject(s)
Acromegaly , Human Growth Hormone , Acromegaly/drug therapy , Cohort Studies , Human Growth Hormone/analogs & derivatives , Humans , Insulin-Like Growth Factor I , Retrospective Studies , Somatostatin/therapeutic use
12.
Pain ; 162(4): 1104-1115, 2021 04 01.
Article in English | MEDLINE | ID: mdl-33044394

ABSTRACT

ABSTRACT: Nitrous oxide (N2O) is an odorless and colorless gas routinely used as an adjuvant of anesthesia and for short-duration analgesia in various clinical settings mostly in the form of an N2O/O2 50%-50% equimolar mixture (EMONO). Experimental studies have suggested that EMONO could also induce long-lasting analgesic effects related to the blockade of N-methyl-D-aspartate receptors. We designed the first international multicenter proof of concept randomized, placebo-controlled study to assess the efficacy and safety of a 1-hour administration of EMONO or placebo (medical air) on 3 consecutive days up to 1 month after the last administration in patients with chronic peripheral neuropathic pain. A total of 240 patients were recruited in 22 centers in France and Germany and randomly assigned to 1 study group (120 per group). Average pain intensity (primary outcome), neuropathic pain characteristics (Neuropathic Pain Symptom Inventory), Patient Global Impression of Change, anxiety, depression, and quality of life were systematically assessed before and after treatment. The changes in average pain intensity between baseline and 7 days after the last administration were not significantly different between the 2 groups. However, evoked pain intensity (predefined secondary endpoint) and Patient Global Impression of Change (exploratory endpoint) were significantly improved in the EMONO group, and these effects were maintained up to 4 weeks after the last treatment administration. Mostly transient side effects were reported during the treatment administration. These encouraging results provide a basis for further investigation of the long-term analgesic effects of EMONO in patients with neuropathic pain.


Subject(s)
Neuralgia , Nitrous Oxide , Administration, Inhalation , France , Germany , Humans , Neuralgia/drug therapy , Nitrous Oxide/therapeutic use , Oxygen , Quality of Life , Treatment Outcome
13.
Neuromodulation ; 23(6): 789-795, 2020 Aug.
Article in English | MEDLINE | ID: mdl-32725745

ABSTRACT

BACKGROUND: Occipital nerve stimulation (ONS) is shown to be effective in treating various forms of headache. Most studies describe the treatment of occipital neuralgia (ON), but in many patients, the clinical description could also correspond to cervicogenic headache (CGH) or occipital migraine (OM). These different entities (ON, CGH, and OM) may be grouped together under the term occipital headaches. OBJECTIVE: To assess the efficacy of ONS to treat occipital headaches in a large series of patients with a long-term follow-up. MATERIALS AND METHODS: We performed a retrospective review of data on 60 patients with intractable occipital headaches treated with occipital nerve stimulation (ONS), who were referred to our center between October 2008 and October 2014. Details of pain evaluation, location, duration, cause and previous treatment were analyzed. Evaluations included the visual analog scale (VAS), the number of headache days per month (NHD), and the Medication Quantification Scale (MQS). Trials with transcutaneous electrical nerve stimulation (TENS-ONS) were performed and served as a guide for surgery indication (see Patients and Method section). RESULTS: After one year of ONS, mean VAS had decreased from 8.4/10 to 2.8/10 (72.2% reduction [p < 0.001]), and 76% of patients had at least a 50% decrease in mean VAS score. The mean MQS score decreased from 18 to 8.8, corresponding to a reduction of pain medication by an average of 50%. Adverse events concerned 12 patients (20%). Six patients presented with electrode displacement or fracture (10%) and six patients presented with cases of infection (10%) associated with the pulse generator. CONCLUSIONS: The results of this large series confirm that ONS is an effective treatment option for patients with intractable occipital headaches, but the frequency of complications remains quite high and must be taken into account in the surgical decision.


Subject(s)
Electric Stimulation Therapy , Headache Disorders , Headache Disorders/therapy , Humans , Peripheral Nerves , Retrospective Studies , Treatment Outcome
14.
J Clin Endocrinol Metab ; 105(10)2020 10 01.
Article in English | MEDLINE | ID: mdl-32594169

ABSTRACT

CONTEXT: Inferior petrosal sinus sampling (IPSS) is used to diagnose Cushing's disease (CD) when dexamethasone-suppression and CRH tests, and pituitary magnetic resonance imaging (MRI), are negative or give discordant results. However, IPSS is an invasive procedure and its availability is limited. OBJECTIVE: To test a noninvasive diagnostic strategy associated with 100% positive predictive value (PPV) for CD. DESIGN: Retrospective study. SETTING: Two university hospitals. PATIENTS: A total of 167 patients with CD and 27 patients with ectopic ACTH-syndrome investigated between 2001 and 2016. MAIN OUTCOME MEASURE(S): Performance of a strategy involving the CRH and desmopressin tests with pituitary MRI followed by thin-slice whole-body computed tomography (CT) scan in patients with inconclusive results. RESULTS: Using thresholds of a cortisol increase > 17% with an ACTH increase > 37% during the CRH test and a cortisol increase > 18% with an ACTH increase > 33% during the desmopressin test, the combination of both tests gave 73% sensitivity and 98% PPV of CD. The sensitivity and PPV for pituitary MRI were 71% and 99%, respectively. CT scan identified 67% EAS at presentation with no false-positives. The PPV for CD was 100% in patients with positive responses to both tests, with negative pituitary MRI and CT scan. The Negative Predictive Value was 100% in patients with negative responses to both tests, with negative pituitary MRI and positive CT scan. Using this strategy, IPPS could have been avoided in 47% of patients in whom it is currently recommended. CONCLUSIONS: In conjunction with expert radiologic interpretation, the non-invasive algorithm studied significantly reduces the need for IPSS in the investigation of ACTH-dependent Cushing's syndrome.


Subject(s)
ACTH Syndrome, Ectopic/diagnosis , Decision Support Techniques , Neuroendocrine Tumors/complications , Pituitary ACTH Hypersecretion/diagnosis , Pituitary Gland/pathology , ACTH Syndrome, Ectopic/blood , ACTH Syndrome, Ectopic/etiology , ACTH Syndrome, Ectopic/surgery , Adolescent , Adrenocorticotropic Hormone/blood , Adrenocorticotropic Hormone/metabolism , Adult , Aged , Aged, 80 and over , Algorithms , Deamino Arginine Vasopressin/administration & dosage , Diagnosis, Differential , Female , Humans , Hydrocortisone/blood , Magnetic Resonance Imaging , Male , Middle Aged , Neuroendocrine Tumors/blood , Neuroendocrine Tumors/pathology , Petrosal Sinus Sampling/adverse effects , Pituitary ACTH Hypersecretion/blood , Pituitary ACTH Hypersecretion/pathology , Pituitary ACTH Hypersecretion/surgery , Pituitary Function Tests/methods , Pituitary Gland/diagnostic imaging , Pituitary Gland/drug effects , Pituitary Gland/surgery , Predictive Value of Tests , Retrospective Studies , Tomography, X-Ray Computed , Young Adult
15.
Eur J Endocrinol ; 182(6): D17-D29, 2020 Jun.
Article in English | MEDLINE | ID: mdl-32234975

ABSTRACT

Current guidelines recommend the use of long-acting somatostatin receptor ligands (SRLs) first when surgery fails to correct GH/IGF-I hypersecretion in patients with acromegaly. In this issue of the journal, a pro- and contra debate will outline which arguments are in favour and which are against positioning pegvisomant (PEGV), a GH receptor antagonist, as the first-line treatment modality of acromegaly. The task of the pros was to promote a paradigm shift towards repositioning PEGV as first-line treatment as PEGV is safe and more effective than the first- and second-generation of SRLs. SRLs, when prescribed together with PEGV can still reduce tumour size when necessary, while they decrease the necessary dose of PEGV by around 50% in the average patient. They conclude that PEGV must move up towards the first-line treatment. For the cons, SRLs remain the first-line medical treatment. Indeed, even if, in recent studies, the remission rate is lower than initially claimed, SRLs are still effective not only for normalizing GH/IGF-I levels in half of the patients but also for inducing tumour shrinkage, improving comorbidities and headaches and reversing excess mortality. They are more convenient for use with their monthly administration and have a remarkable safety profile as demonstrated by the very prolonged experience acquired by more than 30 years of use. Finally, the cost-effectiveness of first-generation SRLs is better than that of PEGV. For all these reasons, cons consider that SRLs remain the best first medical treatment in patients requiring medical therapy.


Subject(s)
Acromegaly/drug therapy , Human Growth Hormone/analogs & derivatives , Receptors, Somatotropin/therapeutic use , Human Growth Hormone/antagonists & inhibitors , Human Growth Hormone/therapeutic use , Humans , Treatment Outcome
16.
Ann Endocrinol (Paris) ; 80(1): 1-9, 2019 Feb.
Article in English | MEDLINE | ID: mdl-30236456

ABSTRACT

OBJECTIVES: The mineralocorticoid receptor (MR), a hormone-activated transcription factor, besides its role in controlling hydroelectrolytic homeostasis, exerts pro-adipogenic and anti-thermogenic effects, inhibiting mitochondrial-uncoupling protein UCP1 expression in brown adipocytes. The aim of this study was to gain insight into the molecular mechanisms by which MR participates in such metabolic regulation. METHODS: We evaluated in vivo MR effects on cold-induced UCP1 expression in MR-overexpressing mice. Expression profiles of several transcriptional coregulators were analyzed during differentiation of the brown adipocyte T37i cell line. Given that UCP1 expression is inversely controlled by catecholamines/retinoic acid and corticosteroids, we investigated the mechanisms of MR's inhibitory effect on UCP1 transcription in T37i cells. Chromatin immunoprecipitation (ChIP) experiments enabled us to explore MR interaction with UCP1 promoter regions. RESULTS: Cold-induced UCP1 expression was blunted in the brown fat of MR-overexpressing mice. Along with induction of increasing mRNA levels for specific adipocyte markers during T37i differentiation, MR coactivator transcript levels significantly increased in intermediate states of differentiation, whereas expression of MR corepressors transiently increased approximately 2-fold. Such a simultaneous transient peak in coregulator expression is consistent with physiologically relevant cooperation occurring during brown adipogenesis. ChIP demonstrated that, after retinoic acid stimulation and aldosterone exposure, MR and PPARγ concomitantly bind to specific UCP1 promoter motifs. CONCLUSION: Our studies demonstrate that MR exerts a pivotal metabolic role by controlling energy expenditure, and provide novel information on how MR participates in the regulation of brown adipocyte function.


Subject(s)
Adipose Tissue, Brown/metabolism , Receptors, Mineralocorticoid/physiology , Thermogenesis/physiology , Transcription, Genetic/physiology , Uncoupling Protein 1/genetics , Adipocytes/chemistry , Adipocytes/physiology , Adipogenesis/physiology , Aldosterone/pharmacology , Animals , Cell Differentiation/physiology , Cell Line , Cold Temperature , Energy Metabolism/physiology , Gene Expression/drug effects , Gene Expression/physiology , Humans , Male , Mice , Mice, Transgenic , Promoter Regions, Genetic/physiology , RNA, Messenger/analysis , Receptors, Mineralocorticoid/genetics , Thermogenesis/genetics , Transcription, Genetic/drug effects , Tretinoin/pharmacology
17.
Endocrine ; 63(2): 348-360, 2019 02.
Article in English | MEDLINE | ID: mdl-30397873

ABSTRACT

CONTEXT: Untreated acromegaly is associated with increased morbidity and mortality due to malignant, cardiovascular, and cerebrovascular disorders. Effective treatment of acromegaly reduces excess mortality, but its impact on cardiovascular risk factors and metabolic parameters are poorly documented. AIM: We analyzed changes in cardiovascular risk factors and metabolic parameters in patients receiving various treatment modalities. PATIENTS AND METHODS: We retrospectively studied 96 patients with acromegaly, both at diagnosis and after IGF-I normalization following surgery alone (n = 51) or medical therapy with first generation somatostatin analogues (SSA, n = 23), or pegvisomant (n = 22). Duration of follow-up was 77 (42-161) months, 75 (42-112) months, and 62 (31-93) months, in patients treated with surgery alone, SSA, and pegvisomant, respectively. In all the cases except four, patients treated medically had underwent previous unsuccessful surgery. RESULTS: IGF-I normalization was associated with increased body weight, decreased systolic blood pressure (SBP) in hypertensive patients, decreased fasting plasma glucose (FPG) and HOMA-IR and HOMA-B levels, increased HDL cholesterol (HDLc); whereas, LDL cholesterol (LDLc) was not significantly different. Plasma PCSK9 levels were unchanged in patients with available values. Cardiovascular and metabolic changes varied with the treatment modality: surgery, but not pegvisomant, had a beneficial effect on SBP; FPG decreased after surgery but increased after SSA; the decline in HOMA-IR was only significant after surgery; pegvisomant significantly increased LDLc and total cholesterol; whereas SA increased HDLc and had no effect on LDLc levels. CONCLUSION: Treatments used to normalize IGF-I levels in patients with acromegaly could have differential effects on cardiovascular risk factors and metabolic parameters.


Subject(s)
Acromegaly/drug therapy , Biomarkers, Tumor/metabolism , Cardiovascular Diseases/etiology , Human Growth Hormone/analogs & derivatives , Somatostatin/analogs & derivatives , Acromegaly/epidemiology , Adenoma/complications , Adenoma/epidemiology , Adenoma/metabolism , Adenoma/therapy , Adult , Aged , Aged, 80 and over , Cardiovascular Diseases/epidemiology , Cardiovascular Diseases/metabolism , Cohort Studies , Female , Growth Hormone-Secreting Pituitary Adenoma/complications , Growth Hormone-Secreting Pituitary Adenoma/epidemiology , Growth Hormone-Secreting Pituitary Adenoma/metabolism , Growth Hormone-Secreting Pituitary Adenoma/therapy , Human Growth Hormone/therapeutic use , Humans , Insulin-Like Growth Factor I/analysis , Insulin-Like Growth Factor I/metabolism , Longitudinal Studies , Male , Middle Aged , Paris/epidemiology , Proprotein Convertase 9/analysis , Proprotein Convertase 9/blood , Retrospective Studies , Risk Factors , Young Adult
18.
Ann Endocrinol (Paris) ; 79(5): 562-568, 2018 Oct.
Article in English | MEDLINE | ID: mdl-30126625

ABSTRACT

Hypophysitis is a frequent toxic endocrine side-effect of immunotherapy. Prevalence is higher with anti-CTLA-4 antibodies (4-20%) or in association with PD-1 inhibitors (8%). Diagnosis is presumptive, based on poorly specific clinical symptoms (usually, headache and asthenia) and/or hyponatremia and/or at least one pituitary deficit and/or abnormal imaging. Visual disorder or polyuropolydipsic syndrome are exceptional. In decreasing order of frequency, deficits are thyrotropic (86-100%), gonadotropic (85-100%) or corticotropic (50-73%); somatotropin deficit or abnormal prolactin level are rarer. Pituitary MRI in acute phase shows variable moderate increase in pituitary volume, ruling out differential diagnoses, especially pituitary metastasis. Treatment of corticotropin deficiency requires systematic emergency replacement therapy, with the usual modalities, while treatment of other deficits depends on clinical status and progression. Thyrotropin and gonadotropin deficits usually recover, but corticotropin deficiency persists over the long term, requiring education and specialized endocrinologic follow-up. Onset of hypophysitis does not contraindicate continuation of immunotherapy and does not usually require high dose synthetic glucocorticoids.


Subject(s)
Immunotherapy/adverse effects , Neoplasms/complications , Neoplasms/therapy , Pituitary Diseases/epidemiology , Pituitary Diseases/therapy , Consensus , Humans , Monitoring, Physiologic
19.
Expert Opin Drug Metab Toxicol ; 14(8): 879-886, 2018 Aug.
Article in English | MEDLINE | ID: mdl-29963937

ABSTRACT

INTRODUCTION: Co-occurring pain impairs depression's prognosis. Selective serotonin reuptake inhibitors (SSRIs) or serotonin and norepinephrine reuptake inhibitors (SNRIs) are first-line pharmacotherapies for depression and inhibit many cytochrome 2D6 enzymes. Codeine is a first-line treatment for pain and needs to be metabolized into morphine by cytochrome 2D6 to exert its analgesic effect. Concomitant prescription of both pharmacotherapies leads to inadequate analgesia. Areas covered: We performed a systematic review of the literature to amalgamate the current knowledge regarding the clinical effect of this association and quantified its prevalence in clinical practice in the French Pays de la Loire area using a retrospective observational cohort study design. Expert opinion: The literature review highlighted that antidepressants with moderate-to-strong inhibition of CYP2D6 should be avoided in patients receiving codeine. However, 0.44% of the 12,296 sampled patients received concomitant codeine and CYP2D6 inhibitor between January 2015 and June 2015. Switching drugs in both painful and depressive patients depends on the pain and depression subtypes. Promising drugs that both show an effect on pain and depression are currently being studied but are not usable in clinical practice. Until then, tailored communication reinforcement toward health-care professionals is needed to prevent these problematic occurrences of concomitant prescription administration.


Subject(s)
Codeine/administration & dosage , Cytochrome P-450 CYP2D6 Inhibitors/administration & dosage , Selective Serotonin Reuptake Inhibitors/administration & dosage , Serotonin and Noradrenaline Reuptake Inhibitors/administration & dosage , Adolescent , Adult , Analgesics, Opioid/administration & dosage , Analgesics, Opioid/pharmacokinetics , Antidepressive Agents/administration & dosage , Antidepressive Agents/pharmacology , Codeine/pharmacokinetics , Cohort Studies , Cytochrome P-450 CYP2D6 Inhibitors/pharmacology , Depression/complications , Depression/drug therapy , Drug Interactions , Female , France , Humans , Male , Middle Aged , Pain/complications , Pain/drug therapy , Retrospective Studies , Selective Serotonin Reuptake Inhibitors/pharmacology , Serotonin and Noradrenaline Reuptake Inhibitors/pharmacology , Young Adult
20.
Ann Endocrinol (Paris) ; 79(5): 591-595, 2018 Oct.
Article in English | MEDLINE | ID: mdl-30056975

ABSTRACT

The present final consensus statement of the French Society of Endocrinology lays out the assessments that are to be systematically performed before and during anticancer treatment by immunotherapy, tyrosine kinase inhibitors or mTOR inhibitors, even without onset of any endocrinopathy. It also discusses the CTCAE adverse event grading system in oncology and the difficulty of implementing it for endocrine side-effects of these anticancer treatments. Notably, this is why certain treatment steps applied in other side-effects (e.g., high-dose corticosteroids, contraindications to immunotherapy, etc.) need to be discussed before implementation for endocrine side-effects.


Subject(s)
Antineoplastic Agents/adverse effects , Endocrine System Diseases/chemically induced , Endocrine System Diseases/diagnosis , Immunotherapy/adverse effects , Neoplasms/complications , Animals , Consensus , Endocrine System Diseases/epidemiology , Humans , Neoplasms/drug therapy
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