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1.
Int J Mol Sci ; 25(15)2024 Jul 28.
Artículo en Inglés | MEDLINE | ID: mdl-39125812

RESUMEN

Minipuberty is a term describing transient postnatal activation of the hypothalamic-pituitary-gonadal axis, likely playing an important role in the postnatal growth of female genital organs and breasts. Unlike infant boys, there are no data concerning the impact of gestational hypothyroidism on the course of minipuberty in infant girls. Therefore, the aim of the current study was to investigate the reproductive axis and genital organs in daughters of women with thyroid hypofunction during pregnancy. The study population included three matched groups of infant girls: offspring of women with thyroid hypofunction non-substituted or inadequately treated during gestation (group 1), descendants of women adequately substituted throughout pregnancy (group 2), and daughters of healthy women (group 3). Salivary concentrations of estradiol, progesterone, 17-hydroxyprogesterone, and androgens (testosterone, androstenedione, and dehydroepiandrosterone sulfate) and urine levels of gonadotropins were measured monthly from month 1 to month 6, once every two months between postnatal months 6 and 12, and once every three months between postnatal months 12 and 18. During each visit, we also determined ovarian volume, uterine length, and breast diameter. Concentrations of FSH, LH, and estradiol were lowest in group 1, and this group was also characterized by the shortest detection period for gonadotropins and estradiol. These differences were paralleled by differences in ovarian volume, uterine length, and breast diameter. There were no differences between groups 2 and 3 in levels of both hormones and in the size of the measured structures. The obtained results seem to indicate that non-substituted or inadequately substituted hypothyroidism during pregnancy may impair the course of minipuberty in the female offspring.


Asunto(s)
Hipotiroidismo , Humanos , Femenino , Hipotiroidismo/metabolismo , Embarazo , Adulto , Complicaciones del Embarazo/metabolismo , Pubertad , Ovario/metabolismo , Adolescente , Lactante , Efectos Tardíos de la Exposición Prenatal/metabolismo
2.
Nutrients ; 16(14)2024 Jul 21.
Artículo en Inglés | MEDLINE | ID: mdl-39064805

RESUMEN

Minipuberty is a term describing temporary, sex-specific activation of the hypothalamic-pituitary-gonadal axis, which is implicated in the development of male and female genital organs. Sons of women with low vitamin D during gestation were found to be characterized by increased activity of the reproductive axis and faster postnatal growth of genital organs. The current study assesses for the first time the course of minipuberty in female descendants of women with a vitamin D deficit. The study population included three matched groups of infant girls: children born to women with vitamin D deficiency (25OHD concentration below 50 nmol/L), offspring of women with vitamin D insufficiency (25OHD concentration between 50 and 75 nmol/L), and daughters of healthy females (25OHD concentration between 75 and 150 nmol/L). Salivary concentrations of estradiol, progesterone, 17-hydroxyprogesterone and androgens, as well as urine concentrations of FSH and LH, were assayed during the first 18 months of life (once a month in the first 6 months, bimonthly between months 6 and 12, and then every three months). At each visit, beyond hormone measurements, the investigators assessed the size of reproductive organs: ovaries, uterus and breasts. In daughters of mothers with vitamin D deficiency, concentrations of FSH, LH and estradiol were higher and detectable for a longer period of time, while ovarian volume, uterine length and breast diameter were greater than in the remaining groups. Children born to women with vitamin D insufficiency were characterized by higher FSH levels than daughters of healthy females, though the detection period was the same, and both groups differed in breast diameter. These findings suggest that low vitamin D status during gestation leads to more pronounced and longer-lasting activation of the reproductive axis, and is associated with increased dimensions of sexual organs, the magnitude of which depends on the degree of vitamin D deficit.


Asunto(s)
Deficiencia de Vitamina D , Vitamina D , Humanos , Femenino , Embarazo , Vitamina D/sangre , Lactante , Adulto , Hormona Luteinizante/sangre , Estradiol/sangre , Ovario/metabolismo , Sistema Hipotálamo-Hipofisario/metabolismo , Saliva/química , Saliva/metabolismo , Recién Nacido , Maduración Sexual , Efectos Tardíos de la Exposición Prenatal
3.
Front Med (Lausanne) ; 11: 1336861, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38298817

RESUMEN

The pathology laboratory at Kamuzu Central Hospital (KCH) in Lilongwe, Malawi was established in 2011. We published our initial experiences in laboratory development and telepathology in 2013 and 2016, respectively. The purpose of this paper is to provide an update on our work by highlighting the positive role laboratory development has played in improving regional cancer care and research. In addition, we provide a summary of the adult pathology data from specimens received between July 1, 2011, and May 31, 2019, with an emphasis on malignant diagnoses. We compare these summaries to estimates of cancer incidence in this region to identify gaps and future needs.

4.
Pharmacol Rep ; 76(1): 195-206, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38051473

RESUMEN

BACKGROUND: Metformin reduces plasma TSH levels if these levels are elevated. No study has investigated whether the hormonal effects of metformin are impacted by thyroid autoimmunity. The current study aimed to compare the effect of metformin on hypothalamic-pituitary-thyroid axis activity between subjects with mild hypothyroidism of different origins. METHODS: The study population consisted of two groups of women with prediabetes and mildly elevated TSH levels, matched by age, insulin sensitivity, TSH, and thyroid hormone levels. Group A included 26 women with autoimmune thyroiditis, while group B enrolled 26 individuals with hypothyroidism of non-autoimmune origin. Both groups were treated with metformin (2.55-3 g daily). Circulating levels of TSH, total and free thyroid hormones, glucose, insulin, prolactin, high-sensitivity C-reactive protein (hsCRP) and 25-hydroxyvitamin D, concentrations of thyroid antibodies, and structure parameters of thyroid homeostasis were assessed at baseline and 6 months later. RESULTS: All patients completed the study. At baseline, both groups differed in concentrations of thyroid peroxidase antibodies, thyroglobulin antibodies, hsCRP, and 25-hydroxyvitamin D. The drug reduced TSH and Jostel's index, with no difference between the study groups. The improvement in insulin sensitivity, observed in both groups, was more pronounced in group B than in group A. In women with autoimmune hypothyroidism, the drug increased SPINA-GT and decreased hsCRP levels. The remaining markers did not change throughout the study. CONCLUSIONS: The obtained results suggest that, despite differences in thyroid output, the impact of metformin on TSH levels is similar in hypothyroid women with and without thyroid autoimmunity.


Asunto(s)
Enfermedad de Hashimoto , Hipotiroidismo , Resistencia a la Insulina , Metformina , Tiroiditis Autoinmune , Humanos , Femenino , Metformina/farmacología , Metformina/uso terapéutico , Proyectos Piloto , Proteína C-Reactiva/metabolismo , Tirotropina , Sistema Hipotálamo-Hipofisario/metabolismo , Hipotiroidismo/tratamiento farmacológico , Hipotiroidismo/metabolismo , Hormonas Tiroideas
5.
J Clin Med ; 12(24)2023 Dec 13.
Artículo en Inglés | MEDLINE | ID: mdl-38137718

RESUMEN

Minipuberty is a period of increased reproductive axis activity in infancy, which seems to be implicated in the postnatal development of male genital organs. Impaired thyroid function during pregnancy is associated with an increased risk of prenatal, perinatal, and postnatal complications. The aim of this study was to investigate whether the presence of hypothyroidism during pregnancy modulates the course of male minipuberty. We compared three matched groups of male infants: sons of women with hypothyroidism uncontrolled or poorly controlled during pregnancy (group A), male offspring of women treated over the entire pregnancy with adequate doses of levothyroxine (group B), and sons born to women with no evidence of thyroid disease (group C). Salivary levels of testosterone, androstenedione, dehydroepiandrosterone sulfate, estradiol, progesterone, and 17-hydroxyprogesterone, as well as urine concentrations of FSH and LH, were assessed once a month in the first 6 months of life, and once every two months between months 6 and 12. Gonadotropin and testosterone levels during the first 6 months of life were lower in group A than in groups B and C. Differences in testosterone and gonadotropin levels were accompanied by similar differences in penile length and testicular volume. Concentrations of the remaining hormones did not differ between the study groups. The obtained results suggest that untreated or undertreated maternal thyroid hypofunction in pregnancy has an inhibitory effect on postnatal activation of the hypothalamic-pituitary-testicular axis and genital organ development in their male offspring.

6.
Nutrients ; 15(22)2023 Nov 09.
Artículo en Inglés | MEDLINE | ID: mdl-38004122

RESUMEN

Minipuberty is a transient phase of reproductive axis activation during the first several months of life, playing an important role in the development of reproductive organs in boys. Low 25-hydroxyvitamin D levels during pregnancy are associated with an increased risk of neonatal complications. An inadequate gestational vitamin D status is hypothesized to affect the postnatal activation of the hypothalamic-pituitary-gonadal axis. The purpose of our study was to assess whether a low vitamin D status during pregnancy determines the course of minipuberty in boys. The study included three groups of male infants born to women with different vitamin D statuses: sons of women with vitamin D deficiency (group 1), sons of women with vitamin D insufficiency (group 2), and male offspring of females with normal 25-hydroxyvitamin D levels (group 3 (the reference group)). Concentrations of testosterone, androstenedione, dehydroepiandrosterone sulfate, estradiol, progesterone, and 17-hydroxyprogesterone in saliva, as well as concentrations of gonadotropins in urine, were assayed monthly from postnatal months 1 to 6, and once every 2 months in the second half of the first year of life. Additionally, at each visit, penile length and testicular volume were assessed. Concentrations of testosterone, FSH, and LH, as well as penile length and testicular volume, were greater in group 1 than in groups 2 and 3. In turn, group 2 was characterized by higher FSH levels and a greater testicular volume than group 3. Peak concentrations of LH and testosterone were observed earlier in group 1 than in the remaining groups. The obtained results suggest that a low vitamin D status during pregnancy may have a stimulatory impact on reproductive axis activity and on the early postnatal development of male genital organs, correlating with the severity of hypovitaminosis D.


Asunto(s)
Núcleo Familiar , Deficiencia de Vitamina D , Lactante , Recién Nacido , Humanos , Masculino , Femenino , Embarazo , Testosterona , Androstenodiona , Vitamina D , Hormona Folículo Estimulante
7.
Sex Transm Dis ; 50(11): 753-759, 2023 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-37824787

RESUMEN

BACKGROUND: Genital ulcer diseases (GUDs) are a common syndrome associated with sexually transmitted infections. Genital ulcer diseases increase the risk of HIV transmission, necessitating appropriate diagnosis and treatment. We provide an updated GUD etiology assessment in Malawi to guide diagnostic development and treatment algorithms. METHODS: We enrolled patients 18 years or older presenting with GUD at a sexually transmitted infection clinic in Lilongwe, Malawi, between May and October 2021. We purposively sampled by HIV status. Swabs of ulcers were tested for Treponema pallidum, herpes simplex virus (HSV)-1 and HSV-2, Haemophilus ducreyi, and Chlamydia trachomatis using polymerase chain reaction. Blood was collected for syphilis and HSV-2 serologies and acute HIV testing. Participants were treated per Malawi guidelines. Ulcer resolution (size reduced by >50%) was evaluated 14 days later. RESULTS: Fifty participants enrolled (30 without HIV, 2 with acute HIV infection, 18 with HIV seropositivity; 32 men, 18 women). Forty-six (92%) had an etiology identified. Syphilis was more common among those without HIV (22 of 30 [73%]) than participants with HIV (PWH; 8 of 20 [40%]; P = 0.04). Herpes simplex virus was more common among PWH (11 of 20 [55%]) than participants without (2 of 30 [7%]; P = 0.0002). One-fifth (9 of 50 [18%]) had H. ducreyi. Among those who returned for follow-up (n = 45), 9 (20%) had unresolved ulcers; persistent GUD was slightly more common in PWH (6 of 19 [32%]) than participants without (3 of 26 [12%]; P = 0.14). CONCLUSIONS: We observed a dramatic increase in syphilis ulcer proportion in a population whose GUDs were previously HSV predominant. Observed differences in etiology and resolution by HIV status could play an important role in the ongoing transmission and treatment evaluation of GUD.


Asunto(s)
Enfermedades de los Genitales Masculinos , Infecciones por VIH , Herpes Genital , Herpesvirus Humano 1 , Enfermedades de Transmisión Sexual , Sífilis , Masculino , Humanos , Femenino , Úlcera/epidemiología , Úlcera/etiología , Infecciones por VIH/complicaciones , Infecciones por VIH/epidemiología , Sífilis/complicaciones , Sífilis/epidemiología , Sífilis/diagnóstico , Malaui/epidemiología , Enfermedades de Transmisión Sexual/epidemiología , Herpesvirus Humano 2 , Genitales , Herpes Genital/complicaciones , Herpes Genital/epidemiología , Enfermedades de los Genitales Masculinos/etiología
8.
J Clin Med ; 12(17)2023 Aug 23.
Artículo en Inglés | MEDLINE | ID: mdl-37685540

RESUMEN

The effect of metformin on prolactin concentration seems to be sex-dependent. The aim of this study was to determine whether the androgen status modulates the impact of metformin on plasma prolactin levels in women. This study included two matched groups of prediabetic women with hyperprolactinemia: 25 with PCOS and 25 control subjects with androgen levels within the reference range and with normal ovarian morphology. Glucose homeostasis markers, prolactin, the remaining anterior pituitary hormones, sex hormones, SHBG and IGF-1 were determined before and after six months of metformin treatment. At baseline, both groups differed in LH, LH/FSH ratio, testosterone, FAI, DHEA-S, androstenedione and estradiol. Although metformin improved insulin sensitivity and increased SHBG in both study groups, these effects were more pronounced in control subjects than in women with PCOS. In control subjects, the drug decreased total and monomeric prolactin and increased LH. In women with PCOS, metformin reduced LH, LH/FSH ratio, testosterone and FAI. In the control group, the impact on total and monomeric prolactin positively correlated with their baseline levels and with the degree of improvement in insulin sensitivity, as well as negatively correlated with testosterone and FAI. In women with PCOS, treatment-induced changes in testosterone and FAI positively correlated with the changes in LH and LH/FSH ratio. The obtained results suggest that the prolactin-lowering properties of metformin are less pronounced in women with coexisting PCOS than in women with elevated prolactin levels, probably owing to the increased production of endogenous testosterone.

9.
Molecules ; 28(15)2023 Aug 07.
Artículo en Inglés | MEDLINE | ID: mdl-37570897

RESUMEN

Atherosclerosis is a multifactorial, progressive, chronic inflammatory disease. Ultrasound and magnetic resonance imaging are the most accurate predictors of atherosclerotic plaque instability (MRI). Cytokines such as osteopontin, osteoprotegerin, and metalloproteinase 9 could be used as the most recent markers to identify and track the efficacy of anti-atherosclerotic therapy. Patients with USG and MRI-verified unstable atherosclerotic plaque were included in the study. Biomarker concentrations were measured and compared before and after PCSK9 inhibitor therapy. Additionally, concentrations prior to treatment were correlated with MRI images of the carotid artery. After treatment with alirocumab, the concentrations of MMP-9 (p < 0.01) and OPN, OPG (p < 0.05) decreased significantly. Furthermore, the results of OPN, OPG, and MMP 9 varied significantly depending on the type of atherosclerotic plaque in the MRI assay. In stable atherosclerotic plaques, the concentrations of OPN and OPG were greater (p < 0.01), whereas the concentration of MMP9 correlated with the instability of the plaque (p < 0.05). We demonstrated, probably for the first time, that alirocumab therapy significantly decreased the serum concentration of atherosclerotic plaque markers. In addition, we demonstrated the relationship between the type of atherosclerotic plaque as determined by carotid MRI and the concentration of these markers.


Asunto(s)
Aterosclerosis , Placa Aterosclerótica , Humanos , Placa Aterosclerótica/diagnóstico por imagen , Placa Aterosclerótica/tratamiento farmacológico , Proproteína Convertasa 9 , Ultrasonografía
10.
Pharmacology ; 108(5): 451-459, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37536301

RESUMEN

INTRODUCTION: Polycystic ovary syndrome (PCOS) is a frequent endocrinopathy in young women with significantly increased cardiometabolic risk. Siblings of women with this disorder are at increased risk of insulin resistance and androgen excess. The current study was aimed at investigating cardiometabolic effects of atorvastatin in sisters of women with PCOS. METHODS: This prospective observational study compared two age-, body mass index-, blood pressure-, and plasma lipid-matched groups of women with hypercholesterolemia: sisters of PCOS probands (group A) and unrelated control subjects (group B), receiving atorvastatin (40 mg daily). Plasma lipids, glucose homeostasis markers, concentrations of sex hormones, high-sensitivity C-reactive protein (hsCRP), homocysteine, fibrinogen and uric acid, and the urinary albumin-to-creatinine ratio (UACR) were measured before entering the study and 6 months later. RESULTS: Both groups differed in the degree of insulin resistance, testosterone, free androgen index (FAI), circulating levels of hsCRP and homocysteine, and UACR. There were no between-group differences in the impact of atorvastatin on plasma lipids. Despite reducing hsCRP and homocysteine in both groups of women, the effect on these biomarkers was stronger in group B than in group A. Only in group B, atorvastatin did reduce fibrinogen, uric acid, and UACR. Only in group A, atorvastatin did worsen insulin sensitivity and tended to reduce testosterone and FAI. The impact of atorvastatin on hsCRP, homocysteine, fibrinogen, uric acid, and UACR inversely correlated with testosterone and FAI. CONCLUSION: The obtained results suggest that sisters of women with PCOS may benefit to a lesser degree from atorvastatin treatment than other women.


Asunto(s)
Enfermedades Cardiovasculares , Resistencia a la Insulina , Síndrome del Ovario Poliquístico , Humanos , Femenino , Atorvastatina/uso terapéutico , Atorvastatina/farmacología , Síndrome del Ovario Poliquístico/tratamiento farmacológico , Síndrome del Ovario Poliquístico/complicaciones , Andrógenos , Proteína C-Reactiva/análisis , Proteína C-Reactiva/metabolismo , Ácido Úrico , Factores de Riesgo Cardiometabólico , Hermanos , Factores de Riesgo , Enfermedades Cardiovasculares/etiología , Enfermedades Cardiovasculares/prevención & control , Testosterona , Fibrinógeno/análisis
11.
Pharmaceuticals (Basel) ; 16(7)2023 Jun 24.
Artículo en Inglés | MEDLINE | ID: mdl-37513834

RESUMEN

Metformin has been found to reduce elevated gonadotropin levels. Hashimoto's thyroiditis is the most common thyroid disorder in iodine-sufficient areas, and it often develops in postmenopausal women. The aim of this study was to investigate whether autoimmune thyroiditis determines the impact of metformin on gonadotrope secretory function. Two matched groups of postmenopausal women were studied: 35 with euthyroid Hashimoto's thyroiditis (group A) and 35 without thyroid disorders (group B). Throughout the study, all participants received oral metformin (2.55-3 g daily). Plasma glucose, insulin, gonadotropins, estradiol, progesterone, thyrotropin, free thyroid hormones, prolactin, adrenocorticotropic hormone, insulin-like growth factor-1, hsCRP, thyroid peroxidase, and thyroglobulin antibody titers were measured at the beginning of the study and six months later. At entry, both groups differed in thyroid peroxidase antibody titers, thyroglobulin antibody titers, and hsCRP levels. In group A, baseline antibody titers correlated positively with hsCRP and negatively with insulin sensitivity. Although metformin improved glucose homeostasis and reduced hsCRP levels in both study groups, these effects were more pronounced in group B than in group A. Only in group B did metformin decrease FSH levels and tend to reduce LH levels. Thyroid antibody titers and the levels of the remaining hormones did not change throughout the study. The impact of metformin on gonadotropin levels correlated with their baseline values and the degree of improvement in insulin sensitivity, as well as with the baseline and treatment-induced reduction in hsCRP. Moreover, the impact on gonadotropins and insulin sensitivity in group A depended on baseline antibody titers. The obtained results indicate that coexisting autoimmune thyroiditis impairs the gonadotropin-lowering effects of metformin in postmenopausal women.

12.
J Antimicrob Chemother ; 78(8): 1982-1991, 2023 08 02.
Artículo en Inglés | MEDLINE | ID: mdl-37352017

RESUMEN

OBJECTIVES: Global antimicrobial resistance (AMR) surveillance in Neisseria gonorrhoeae is essential. In 2017-18, only five (10.6%) countries in the WHO African Region reported to the WHO Global Gonococcal Antimicrobial Surveillance Programme (WHO GASP). Genomics enhances our understanding of gonococcal populations nationally and internationally, including AMR strain transmission; however, genomic studies from Africa are extremely scarce. We describe the gonococcal genomic lineages/sublineages, including AMR determinants, and baseline genomic diversity among strains in Uganda, Malawi and South Africa, 2015-20, and compare with sequences from Kenya and Burkina Faso. METHODS: Gonococcal isolates cultured in Uganda (n = 433), Malawi (n = 154) and South Africa (n = 99) in 2015-20 were genome-sequenced. MICs were determined using ETEST. Sequences of isolates from Kenya (n = 159), Burkina Faso (n = 52) and the 2016 WHO reference strains (n = 14) were included in the analysis. RESULTS: Resistance to ciprofloxacin was high in all countries (57.1%-100%). All isolates were susceptible to ceftriaxone, cefixime and spectinomycin, and 99.9% were susceptible to azithromycin. AMR determinants for ciprofloxacin, benzylpenicillin and tetracycline were common, but rare for cephalosporins and azithromycin. Most isolates belonged to the more antimicrobial-susceptible lineage B (n = 780) compared with the AMR lineage A (n = 141), and limited geographical phylogenomic signal was observed. CONCLUSIONS: We report the first multi-country gonococcal genomic comparison from Africa, which will support the WHO GASP and WHO enhanced GASP (EGASP). The high prevalence of resistance to ciprofloxacin (and empirical use continues), tetracycline and benzylpenicillin, and the emerging resistance determinants for azithromycin show it is imperative to strengthen the gonococcal AMR surveillance, ideally including genomics, in African countries.


Asunto(s)
Antibacterianos , Gonorrea , Humanos , Antibacterianos/farmacología , Antibacterianos/uso terapéutico , Neisseria gonorrhoeae , Azitromicina/farmacología , Malaui , Sudáfrica , Uganda/epidemiología , Farmacorresistencia Bacteriana , Gonorrea/epidemiología , Gonorrea/tratamiento farmacológico , Ciprofloxacina/farmacología , Pruebas de Sensibilidad Microbiana , Tetraciclina/farmacología , Genómica
13.
Nutrients ; 15(12)2023 Jun 20.
Artículo en Inglés | MEDLINE | ID: mdl-37375719

RESUMEN

Thyroid autoimmunity is associated with an increased risk of sexual dysfunction. The aim of this study was to compare sexual functioning and depressive symptoms in women with Hashimoto's thyroiditis receiving different treatments. The study included euthyroid women with autoimmune thyroiditis, untreated or receiving vitamin D, selenomethionine, or myo-inositol. Apart from measuring antibody titers and hormone levels, all participants completed questionnaires evaluating female sexual function (FSFI) and depressive symptoms (BDI-II). In untreated women, the overall FSFI scores and domain scores for desire, arousal, lubrication, and sexual satisfaction were lower than in women receiving vitamin D, selenomethionine, and myo-inositol. In the vitamin D-treated women, the total FSFI scores and scores for desire and arousal were higher than in women receiving the remaining micronutrients. The BDI-II score was lowest in the vitamin D-treated women and highest in the untreated patients with thyroiditis. Vitamin D-treated women were also characterized by lower antibody titers and higher testosterone levels than the women receiving the remaining micronutrients. There were no differences in sexual functioning and depressive symptoms between the selenomethionine- and myo-inositol-treated women. The study results suggest that although all antibody-lowering treatments are associated with better sexual functioning and well-being in young women with euthyroid autoimmune thyroiditis, the greatest benefits are observed in patients receiving vitamin D.


Asunto(s)
Depresión , Enfermedad de Hashimoto , Selenometionina , Vitamina D , Femenino , Humanos , Depresión/etiología , Enfermedad de Hashimoto/complicaciones , Enfermedad de Hashimoto/tratamiento farmacológico , Proyectos Piloto , Selenometionina/uso terapéutico , Tiroiditis Autoinmune , Vitamina D/uso terapéutico , Vitaminas/uso terapéutico , Resultado del Tratamiento , Adulto
14.
J Clin Med ; 12(11)2023 May 27.
Artículo en Inglés | MEDLINE | ID: mdl-37297909

RESUMEN

Metformin was found to decrease elevated levels of anterior pituitary hormones. Its impact on lactotrope secretory function was absent in women with vitamin D insufficiency. This study investigated whether vitamin D status determines metformin action on overactive gonadotropes. We compared the effect of six-month metformin treatment on the plasma levels of gonadotropins, TSH, prolactin, ACTH, estradiol, free thyroid hormones, IGF-1, and 25-hydroxyvitamin D, as well as on glucose homeostasis markers between three matched groups of postmenopausal women at high risk for diabetes: untreated subjects with vitamin D insufficiency (group A), untreated women with normal vitamin D status (group B), and individuals receiving vitamin D supplementation with normal 25-hydroxyvitamin D levels (group C). Only in groups B and C did metformin reduce FSH levels and tend to decrease LH levels, and these effects correlated with baseline gonadotropin levels, baseline 25-hydroxyvitamin D levels, and the improvement in insulin sensitivity. Follow-up gonadotropin levels were higher in group A than in the other two groups. The drug did not affect circulating levels of TSH, prolactin, ACTH, estradiol, free thyroid hormones, IGF-1, or 25-hydroxyvitamin D. The obtained results suggest that the impact of metformin on gonadotropin secretion in women after menopause is determined by vitamin D status.

15.
J Clin Med ; 12(11)2023 May 31.
Artículo en Inglés | MEDLINE | ID: mdl-37297964

RESUMEN

Metformin decreases elevated prolactin levels, which are frequently found in patients with thyroid disorders. The aim of this study was to investigate whether thyroid autoimmunity modulates the impact of metformin on lactotrope secretory function. This study compared two matched groups of young women with prediabetes and mild-to-moderate prolactin excess: 28 subjects with coexisting euthyroid autoimmune thyroiditis (group 1) and 28 individuals without thyroid disorders (group 2), treated for six months with metformin (3 g daily). Thyroid antibody titers, glucose homeostasis markers, prolactin, thyrotropin, free thyroid hormones, FSH, LH, ACTH, IGF-1 and hsCRP were assessed at the beginning and at the end of the study. At entry, the study groups differed in antibody titers and hsCRP levels. Although the improvement in glucose homeostasis and the decrease in hsCRP levels were observed in both study groups, they were more pronounced in group 2. Only in group 2 did metformin reduce circulating prolactin levels (both total and monomeric). Prolactin-lowering properties of metformin positively correlated with baseline prolactin levels, baseline antibody titers (in group 1) and with the degree of reduction in hsCRP levels. The obtained results suggest that autoimmune thyroiditis may attenuate the impact of metformin on lactotrope secretory function.

16.
Nutrients ; 15(10)2023 May 14.
Artículo en Inglés | MEDLINE | ID: mdl-37242186

RESUMEN

Both hyperprolactinemia and vitamin D deficiency appear to be associated with increased cardiometabolic risk. This study aimed to determine whether vitamin D status influences the cardiometabolic effects of cabergoline. The study included three matched groups of women with mild to moderate hyperprolactinemia: vitamin D-naive subjects with vitamin D insufficiency (group A), women with vitamin D deficiency/insufficiency successfully treated with vitamin D (group B), and vitamin D-naive individuals with normal vitamin D status (group C). Plasma prolactin, 25-hydroxyvitamin D, estradiol, glucose homeostasis markers, lipids, high-sensitivity C-reactive protein (hsCRP), fibrinogen, homocysteine, and uric acid, as well as the urinary albumin-to-creatinine ratio (UACR), were measured at study entry and after four months of cabergoline treatment. Although cabergoline reduced prolactin levels and increased estradiol levels in all study groups, the effect on prolactin was more pronounced in groups B and C compared to group A. In groups B and C, the drug enhanced glucose homeostasis, increased HDL-cholesterol, and decreased triglycerides, hsCRP, fibrinogen, homocysteine, uric acid, and UACR. In group A, only insulin resistance, hsCRP, and homocysteine were reduced by cabergoline. The effects on insulin sensitivity, HDL-cholesterol, triglycerides, hsCRP, fibrinogen, homocysteine, uric acid, and UACR were proportional to the decrease in prolactin and baseline levels of 25-hydroxyvitamin D. The obtained results suggest that vitamin D status determines cabergoline's cardiometabolic effects.


Asunto(s)
Enfermedades Cardiovasculares , Hiperprolactinemia , Deficiencia de Vitamina D , Humanos , Femenino , Cabergolina/uso terapéutico , Hiperprolactinemia/tratamiento farmacológico , Prolactina , Proyectos Piloto , Proteína C-Reactiva/análisis , Ácido Úrico , Factores de Riesgo , Vitamina D , Vitaminas/uso terapéutico , Triglicéridos , Deficiencia de Vitamina D/complicaciones , Deficiencia de Vitamina D/tratamiento farmacológico , Fibrinógeno/análisis , Glucosa/uso terapéutico
17.
J Clin Med ; 12(9)2023 Apr 29.
Artículo en Inglés | MEDLINE | ID: mdl-37176648

RESUMEN

Although dopaminergic agents are the drugs of choice in treatment of prolactin excess, women who cannot be treated with these agents are recommended to receive estrogen preparations. The aim of this study was to compare cardiometabolic effects of both treatment options. The study population included three groups of young women. Subjects with mild-to-moderate hyperprolactinemia received either low-dose cabergoline or oral combined contraceptives (ethinyl estradiol plus desogestrel), while normoprolactinemic women were drug-naive. Plasma prolactin, glucose homeostasis markers, lipids, circulating levels of uric acid, high-sensitivity C-reactive protein (hsCRP), fibrinogen and homocysteine, and the urinary albumin-to-creatinine ratio (UACR) were assessed at entry and six months later. Hyperprolactinemic women differed from normoprolactinemic ones in glucose homeostasis markers, high-density lipoprotein (HDL)-cholesterol, triglycerides, uric acid, hsCRP, fibrinogen, homocysteine and UACR. Cabergoline decreased total and monomeric prolactin levels, which was accompanied by normalization of glucose, insulin sensitivity, glycated hemoglobin, HDL-cholesterol, triglycerides, uric acid, hsCRP, fibrinogen, homocysteine and UACR. Despite a neutral effect on prolactin levels, combined contraceptives worsened insulin sensitivity and increased triglycerides, hsCRP, fibrinogen and UACR. At follow-up, cabergoline-treated women were characterized by a better cardiometabolic profile than women receiving ethinyl estradiol plus desogestrel. Our findings suggest that only cabergoline reduces cardiometabolic risk in young women with hyperprolactinemia.

18.
J Clin Pharmacol ; 63(9): 1045-1052, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-37173821

RESUMEN

Women with polycystic ovary syndrome (PCOS), the most common endocrinopathy in reproductive age, are characterized by increased cardiometabolic risk. Similar hormonal and metabolic changes were found in their siblings. The purpose of our study was to compare blood pressure-lowering and pleiotropic effects of lisinopril between sisters of women with PCOS and their unrelated peers. The study included two age-, body mass index-, and blood pressure-matched groups of women with grade 1 hypertension: 26 sisters of PCOS probands (Group 1) and 26 individuals without a family history of PCOS (Group 2), receiving 10-40 mg of lisinopril daily. Blood pressure, glucose homeostasis markers, plasma levels of lipids (androgens, estradiol, high-sensitivity C-reactive protein (hsCRP), homocysteine, fibrinogen, and uric acid), and urinary albumin-to-creatinine ratio (UACR) were measured before lisinopril treatment and 6 months later. At baseline, the study groups differed in insulin sensitivity, testosterone, free androgen index (FAI), hsCRP, homocysteine, and UACR. Blood pressure-lowering properties of lisinopril did not differ between the groups. The decrease in homocysteine and UACR, although observed in both groups, was stronger in Group 2 than in Group 1. Only in women without a family history of PCOS lisinopril improved insulin sensitivity and reduce hsCRP, fibrinogen, and uric acid. The remaining markers did not change throughout the study. Cardiometabolic effects of lisinopril correlated with testosterone, free androgen index, and changes in insulin sensitivity. The obtained results suggest that cardiometabolic effects of lisinopril may be slightly less pronounced in sisters of women with PCOS than in women without a family history of this disorder.


Asunto(s)
Enfermedades Cardiovasculares , Resistencia a la Insulina , Síndrome del Ovario Poliquístico , Femenino , Humanos , Síndrome del Ovario Poliquístico/tratamiento farmacológico , Andrógenos , Lisinopril , Proteína C-Reactiva/metabolismo , Hermanos , Factores de Riesgo Cardiometabólico , Ácido Úrico , Testosterona , Enfermedades Cardiovasculares/prevención & control , Fibrinógeno , Índice de Masa Corporal , Factores de Riesgo , Insulina
19.
J Clin Pharmacol ; 63(8): 886-894, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-37042432

RESUMEN

Both prolactin excess and autoimmune (Hashimoto) thyroiditis may predispose to the development of cardiometabolic disorders. The aim of this study was to investigate whether autoimmune thyroiditis determines cardiometabolic effects of cabergoline. The study population consisted of 2 groups of young women: 32 women with euthyroid Hashimoto thyroiditis (group A) and 32 individuals without thyroid disorders (group B). Both groups were matched for age, body mass index, blood pressure, and prolactin levels. Plasma prolactin, thyroid antibodies, glucose homeostasis markers, plasma lipids, circulating levels of uric acid, high-sensitivity C-reactive protein (hsCRP), fibrinogen and homocysteine, and the urinary albumin-to-creatinine ratio were assessed before and after 6 months of cabergoline treatment. All women completed the study. Both groups differed in thyroid antibody titers, insulin sensitivity, high-density lipoprotein cholesterol, hsCRP, homocysteine, and the albumin-to-creatinine ratio. Although cabergoline treatment reduced prolactin levels, improved insulin sensitivity, decreased glycated hemoglobin, increased high-density lipoprotein cholesterol, decreased hsCRP, and reduced the albumin-to-creatinine ratio in both treatment groups, these effects (except for glycated hemoglobin) were more pronounced in group B than in group A. Only in group B, the drug decreased triglycerides, uric acid, fibrinogen, and homocysteine. In group A, hsCRP levels correlated with both baseline thyroid antibody titers and with other cardiometabolic risk factors. The impact of cabergoline on cardiometabolic risk factors depended on the degree of reduction in prolactin levels, while in group A additionally correlated with the effect of treatment on hsCRP. The obtained results suggest that coexisting autoimmune thyroiditis attenuates cardiometabolic effects of cabergoline in young women with hyperprolactinemia.


Asunto(s)
Enfermedades Cardiovasculares , Enfermedad de Hashimoto , Hiperprolactinemia , Resistencia a la Insulina , Tiroiditis Autoinmune , Humanos , Femenino , Cabergolina/uso terapéutico , Prolactina , Enfermedad de Hashimoto/tratamiento farmacológico , Enfermedad de Hashimoto/complicaciones , Tiroiditis Autoinmune/tratamiento farmacológico , Tiroiditis Autoinmune/complicaciones , Proteína C-Reactiva/análisis , Hemoglobina Glucada , Ácido Úrico , Creatinina , Factores de Riesgo , Colesterol , Fibrinógeno/análisis , Enfermedades Cardiovasculares/prevención & control , Enfermedades Cardiovasculares/epidemiología , Lipoproteínas HDL
20.
Pharmacology ; 108(3): 255-264, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36878199

RESUMEN

INTRODUCTION: Autoimmune thyroiditis seems to be associated with increased cardiometabolic risk. Statins, the mainstay of cardiovascular risk reduction and prevention, were found to reduce thyroid antibody titers. The aim of this study was to investigate plasma markers of cardiometabolic risk in statin-treated women with thyroid autoimmunity. METHODS: We compared two matched groups of euthyroid women with hypercholesterolemia receiving atorvastatin treatment: subjects with autoimmune (Hashimoto's) thyroiditis (group A, n = 29) and subjects without thyroid pathology (group B, n = 29). Plasma lipids, glucose homeostasis markers, as well as circulating levels of uric acid, high-sensitivity C-reactive protein (hsCRP), fibrinogen, homocysteine, and 25-hydroxyvitamin D were measured before atorvastatin treatment and 6 months later. RESULTS: At entry, both groups differed in antibody titers, insulin sensitivity, and plasma levels of uric acid, hsCRP, fibrinogen, homocysteine, and 25-hydroxyvitamin D. Atorvastatin-induced reduction in hsCRP and homocysteine, but not in total cholesterol and LDL-cholesterol, was more pronounced in group B than in group A. Only in group B, the drug decreased uric acid and fibrinogen and increased 25-hydroxyvitamin D. In group A, atorvastatin reduced insulin responsiveness. CONCLUSION: The obtained results indicate that euthyroid women with Hashimoto's thyroiditis may benefit to a lesser degree from atorvastatin treatment than other populations of women with hypercholesterolemia.


Asunto(s)
Enfermedades Cardiovasculares , Enfermedad de Hashimoto , Inhibidores de Hidroximetilglutaril-CoA Reductasas , Hipercolesterolemia , Tiroiditis Autoinmune , Humanos , Femenino , Atorvastatina/uso terapéutico , Atorvastatina/farmacología , Hipercolesterolemia/complicaciones , Hipercolesterolemia/tratamiento farmacológico , Tiroiditis Autoinmune/complicaciones , Tiroiditis Autoinmune/tratamiento farmacológico , Proteína C-Reactiva/análisis , Proteína C-Reactiva/metabolismo , Proteína C-Reactiva/uso terapéutico , Factores de Riesgo Cardiometabólico , Ácido Úrico , Factores de Riesgo , Enfermedad de Hashimoto/tratamiento farmacológico , Inhibidores de Hidroximetilglutaril-CoA Reductasas/uso terapéutico , Colesterol , Fibrinógeno/análisis , Fibrinógeno/uso terapéutico , Enfermedades Cardiovasculares/prevención & control
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