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BMC Endocrine Disorders Jun 2024Advanced maternal age may affect the intrauterine environment and increase the risk of neurodevelopmental disorders in offspring. Thyroid hormones are critical for fetal...
BACKGROUND
Advanced maternal age may affect the intrauterine environment and increase the risk of neurodevelopmental disorders in offspring. Thyroid hormones are critical for fetal neurological development but whether maternal age influences fetal thyroid hormone levels in euthyroid mothers is unknown.
OBJECTIVE
This study evaluated the association between cord blood thyroid hormones and maternal age, fetal sex, maternal thyroid function, and other perinatal factors.
METHODS
The study population consisted of 203 healthy women with term singleton pregnancies who underwent elective cesarean section. Maternal levels of free T3 (fT3), free T4 (fT4) and TSH before delivery, and cord levels of fT3, fT4 and TSH were measured. Spearman's correlation coefficient and multiple linear regression analyses were performed to determine the correlation between cord thyroid hormone parameters and maternal characteristics.
RESULTS
There were no significant differences in maternal serum or cord blood thyroid hormone levels between male and female births. In multivariate linear regression analysis, maternal age and maternal TSH values were negatively associated with the cord blood levels of fT3 in all births, after adjusting for confounding factors. Maternal age was more closely associated with the cord blood levels of fT3 in female than in male births.
CONCLUSION
The inverse association between maternal age and cord blood levels of fT3 in euthyroid pregnant women suggested an impact of maternal aging on offspring thyroid function.
Topics: Humans; Female; Maternal Age; Adult; Male; Pregnancy; Fetal Blood; Infant, Newborn; Triiodothyronine; Sex Factors; Thyroid Function Tests; Thyrotropin
PubMed: 38926806
DOI: 10.1186/s12902-024-01631-3 -
Scientific Reports Jun 2024Previously, we demonstrated the expression of visfatin in porcine reproductive tissues and its effect on pituitary endocrinology. The objective of this study was to...
Previously, we demonstrated the expression of visfatin in porcine reproductive tissues and its effect on pituitary endocrinology. The objective of this study was to examine the visfatin effect on the secretion of steroid (P, E) and prostaglandin (PGE, PGF), the mRNA and protein abundance of steroidogenic markers (STAR, CYP11A1, HSD3B, CYP19A1), prostaglandin receptors (PTGER2, PTGFR), insulin receptor (INSR), and activity of kinases (MAPK/ERK1/2, AKT, AMPK) in the porcine corpus luteum. We noted that the visfatin effect strongly depends on the phase of the estrous cycle: on days 2-3 and 14-16 it reduced P, while on days 10-12 it stimulated P. Visfatin increased secretion of E on days 2-3, PGE on days 2-3 and 10-12, reduced PGF release on days 14-16, as well as stimulated the expression of steroidogenic markers on days 10-12 of the estrous cycle. Moreover, visfatin elevated PTGER mRNA expression and decreased its protein level, while we noted the opposite changes for PTGFR. Additionally, visfatin activated ERK1/2, AKT, and AMPK, while reduced INSR phosphorylation. Interestingly, after inhibition of INSR and signalling pathways visfatin action was abolished. These findings suggest a regulatory role of visfatin in the porcine corpus luteum.
Topics: Animals; Corpus Luteum; Female; Swine; Nicotinamide Phosphoribosyltransferase; Estrous Cycle; Receptor, Insulin; Progesterone; Receptors, Prostaglandin; Dinoprost
PubMed: 38926439
DOI: 10.1038/s41598-024-65102-4 -
Zhongguo Dang Dai Er Ke Za Zhi =... Jun 2024To investigate the influencing factors and reference ranges for thyroid function in preterm infants at the age of 7 days, with the aim of avoiding unnecessary clinical...
OBJECTIVES
To investigate the influencing factors and reference ranges for thyroid function in preterm infants at the age of 7 days, with the aim of avoiding unnecessary clinical reexamination and intervention.
METHODS
A retrospective analysis was performed for the data of 685 preterm infants from January 2020 to January 2023. According to gestational age and birth weight, they were divided into a high-risk group (gestational age <34 weeks or birth weight<2 000 g; 228 infants) and a low-risk group (gestational age ≥34 weeks and birth weight ≥2 000 g;457 infants). The influencing factors for thyroid function were analyzed, and 95% reference range was calculated.
RESULTS
Gestational age, birth weight, birth season, sex, and assisted reproduction were the influencing factors for thyroid function (<0.05). For the preterm infants in the high-risk group, the reference ranges of free triiodothyronine (FT3), free thyroxine (FT4), total triiodothyronine (TT3), total thyroxine (TT4), and thyroid stimulating hormone (TSH) were 2.79-5.40 pmol/L, 8.80-25.64 pmol/L, 0.80-2.15 nmol/L, 50.06-165.09 nmol/L, and 0.80-18.57 μIU/mL, respectively. For those in the low-risk group, the reference ranges of these indicators were 3.08-5.93 pmol/L, 11.17-26.24 pmol/L, 1.02-2.27 nmol/L, 62.90-168.95 nmol/L, and 0.69-13.70 μIU/mL, respectively. FT3, FT4, TT3, and TT4 were positively correlated with gestational age (<0.05); FT3, FT4, TT3, and TT4 were positively correlated with birth weight (<0.05); TSH was negatively correlated with birth weight (<0.05).
CONCLUSIONS
Thyroid function in preterm infants at the age of 7 days is affected by the factors such as gestational age and birth weight, and the reference ranges of thyroid function in preterm infants at the age of 7 days should be established based on gestational age and birth weight.
Topics: Humans; Infant, Newborn; Infant, Premature; Male; Female; Reference Values; Thyroid Gland; Thyrotropin; Retrospective Studies; Thyroid Function Tests; Thyroxine; Triiodothyronine; Gestational Age; Birth Weight; Hospitalization
PubMed: 38926380
DOI: 10.7499/j.issn.1008-8830.2312151 -
Zhongguo Dang Dai Er Ke Za Zhi =... Jun 2024To investigate the value of single-phase gonadotropin releasing hormone (GnRH) stimulation test in the diagnosis of central precocious puberty (CPP) in girls with...
OBJECTIVES
To investigate the value of single-phase gonadotropin releasing hormone (GnRH) stimulation test in the diagnosis of central precocious puberty (CPP) in girls with different levels of body mass index (BMI).
METHODS
A retrospective analysis was performed for the data of 760 girls with breast development before 7.5 years of age who attended the Third Affiliated Hospital of Zhengzhou University from January 2017 to August 2023. According to the results of GnRH stimulation test and clinical manifestations, they were divided into a CPP group (297 girls) and a non-CPP group (463 girls). According to the values of BMI, the girls were divided into a normal weight group (540 girls), an overweight group (116 girls), and an obese group (104 girls). The receiver operating characteristic (ROC) curve was used to investigate the value of single-phase GnRH stimulation test in the diagnosis of CPP in girls with different levels of BMI.
RESULTS
Luteinizing hormone (LH)/follicle-stimulating hormone at 30 minutes after GnRH stimulation had an area under the curve (AUC) of 0.985 in the diagnosis of CPP, which was higher than the AUC at 0, 60, and 90 minutes (<0.05). LH at 30 minutes had a similar diagnostic value to LH at 60 minutes (>0.05). LH at 30 minutes was negatively correlated with BMI and BMI-Z value (<0.05).The AUC for diagnosing CPP in normal weight, overweight, and obese girls at 30 minutes LH was 0.952, 0.965, and 0.954, respectively (<0.05).
CONCLUSIONS
The 30-minute GnRH stimulation test has a good value in the diagnosis of CPP in girls with different levels of BMI and is expected to replace the traditional GnRH stimulation test, but the influence of BMI on LH level should be taken seriously.
Topics: Humans; Puberty, Precocious; Female; Gonadotropin-Releasing Hormone; Body Mass Index; Child; Retrospective Studies; Luteinizing Hormone; Follicle Stimulating Hormone; ROC Curve; Child, Preschool
PubMed: 38926375
DOI: 10.7499/j.issn.1008-8830.2312011 -
Reproductive Biology Jun 2024Apelin and APJ have been shown to regulate female reproductive functions. However, its uterine expression during the oestrous cycle and its regulation by ovarian...
Apelin and APJ have been shown to regulate female reproductive functions. However, its uterine expression during the oestrous cycle and its regulation by ovarian steroids, along with gonadotropin regulation in the ovary, has not been investigated. This study aimed to analyze the steroid-dependent uterine expression of apelin/APJ in the uterus along with the oestrous cycle. Furthermore, it also aimed to investigate gonadotropin-dependent ovarian expression of apelin and APJ. To investigate the uterine expression of apelin and APJ during estrous cycle in mice, uterus at different estrous stage were collected. To explore the ovarian steroids dependent expression of apelin system in the uterus, ovariectomized mice were treated with only estrogen at dose of 30 ng/g, only progesterone at dose of 150 μg/g and combined doses. To study the effect of gonadotropin on ovarian expression of apelin system, immature mice were injected with 2.5 IU of pregnant mare serum gonadotropin (PMSG) alone and both PMSG plus 2.5 IU of chorionic gonadotropin (hCG). Apelin and APJ protein expression are modulated by estrous phases in the uterus. The uterine apelin and APJ expression are up-regulated by estrogen and down-regulated by progesterone. The expression and localization of APJ showed increased abundance in the follicles of PMSG treated mice, however, the PMSG plus HCG treatment showed formation of corpus luteum with increased abundance of APJ and progesterone secretion. The expression of apelin and APJ are regulated by pituitary gonadotropin in the ovary and uterine apelin system by ovarian steroid hormone.
PubMed: 38924877
DOI: 10.1016/j.repbio.2024.100918 -
Annals of the New York Academy of... Jun 2024Infants born with severe central disorders of the hypothalamic-pituitary-gonadal axis leading to gonadotropin deficiency not only lack pubertal development in... (Review)
Review
Infants born with severe central disorders of the hypothalamic-pituitary-gonadal axis leading to gonadotropin deficiency not only lack pubertal development in adolescence, but also lack infantile mini-puberty. This period of mini-puberty, where infants have gonadotropin and sex steroid concentrations up into the adult range, is vital for future reproductive capacity, particularly in boys. At present, there is no consensus on the diagnosis or management of infants with gonadotropin deficiency due to congenital hypogonadotropic hypogonadism or multiple pituitary hormone deficiency. Case series suggest that gonadotropin treatment in male infants with absent mini-puberty is effective in promoting both testicular descent in those with undescended testes and also facilitating increased penile size. Moreover, replacement with follicle-stimulating hormone increases the testicular Sertoli cell population, measurable as an increase in testicular volume and inhibin B, thus hypothetically increasing the capacity for spermatogenesis in adult life for these patients. However, long-term follow-up data is limited for both outcomes pertaining to fertility and nonreproductive sequelae, including neurodevelopment and psychological well-being. The use of international registries for patients with gonadotropin deficiency is a key element in the collection of high-quality, geographically widespread data to inform best-practice management from birth to adulthood.
PubMed: 38924109
DOI: 10.1111/nyas.15177 -
Endocrinology Jun 2024The neuroendocrine marker genes Ptprn and Ptprn2 encode protein tyrosine phosphatase receptors N and N2, two members of protein tyrosine phosphatase receptors void of...
The neuroendocrine marker genes Ptprn and Ptprn2 encode protein tyrosine phosphatase receptors N and N2, two members of protein tyrosine phosphatase receptors void of enzymatic activity, and whose function and mechanism of action have not been elucidated. To explore the role(s) of Ptprn and Ptprn2 on the hypothalamic-pituitary-adrenal axis, we used mice in which both genes were knocked out (DKO). The focus in study was on corticotrophs and melanotrophs from the anterior and intermediate lobes of the pituitary gland, respectively. In both sexes, DKO caused an increase in the expression of the corticotroph/melanotroph genes Pomc and Tbx19 and the melanotroph-specific gene Pax7. We also found in vivo and in vitro increased synthesis and release of beta-endorphin, alpha-MSH, and ACTH in DKO mice, which was associated with increased serum corticosterone levels and adrenal mass. DKO also increased the expression of other melanotroph-specific genes, but not corticotroph-specific genes. The dopaminergic pathway in the hypothalamus and dopaminergic receptors in melanotrophs were not affected in DKO mice. However, hyperplasia of the intermediate lobe was observed in DKO females and males, accompanied by increased POMC immunoreactivity per cell. These results indicate that PTPRNs contribute to hypothalamic-pituitary-adrenal function by being involved in processes governing postnatal melanotroph development and Pomc expression.
PubMed: 38923438
DOI: 10.1210/endocr/bqae076 -
Current Nutrition Reports Jun 2024Obesity is an overwhelmingly common medical entity seen in the adult population. A growing body of research demonstrates that there is a significant relationship between... (Review)
Review
PURPOSE OF REVIEW
Obesity is an overwhelmingly common medical entity seen in the adult population. A growing body of research demonstrates that there is a significant relationship between child maltreatment and adult obesity.
RECENT FINDINGS
Emerging research demonstrates a potential dose-response relationship between various types of child abuse and adulthood BMI. Recent work also explores the potential role of the hypothalamic-pituitary-adrenal (HPA) axis, and other hormonal mediators such as sex-hormone binding globulin and leptin. There are also studies that suggest factors such as depression and socioeconomic and environmental influences mediate this relationship. Comorbidities that have been reported include cardiovascular and metabolic disease, diabetes, and insulin resistance. Preliminary work also demonstrates potential gender and racial disparities in the effect of abuse on adulthood obesity. In this narrative review, we summarize the existing work describing the different child maltreatment types (physical, sexual, emotional, verbal, and child neglect) and their relation to adult obesity, what is known about a potential dose-response relationship, potential mediators and pathophysiology, comorbidities, and preliminary work on gender and racial/ethnic disparities. We review the limited data on interventions that have been studied, and close with a discussion of implications and suggestions for clinicians who treat adult obesity, as well as potential future research directions.
PubMed: 38922364
DOI: 10.1007/s13668-024-00558-4 -
Brazilian Journal of Biology = Revista... 2024The growth hormone (GH) gene plays a vital role in regulating animal metabolism and body size, making it a potential candidate for influencing livestock performance....
The growth hormone (GH) gene plays a vital role in regulating animal metabolism and body size, making it a potential candidate for influencing livestock performance. This study aimed to investigate the polymorphisms within the GH gene and their associations with 10 biometric traits in the Sumbawa cattle population of Indonesia. Biometric trait data and blood samples were collected from 112 Sumbawa cattle individuals, and their GH gene sequences were analyzed using two sets of primers for amplification. Seven single nucleotide polymorphisms (SNPs) were identified in the GH gene: g.442C>T, g.446G>C, g.558C>T, g.649C>A, g.1492C>A, g.1510C>A, and g.1578G>A. All SNPs were located in the intronic region except for SNP g.558C>T, which was found in the coding sequence (CDS) region. The SNP g.558C>T is classified as a synonymous variant. Haplotype analysis revealed a strong linkage disequilibrium between SNPs g.558C>T and g.649C>A. Distributions of genotypes and alleles of all SNPs were in agreement with the Hardy-Weinberg equilibrium (p > 0.05, χ2 < 15.56), except for SNPs g.446G>C and g.1492C>A. The association study showed that the SNP g.442C>T significantly (p < 0.05) affected HL, BL, SH, and PH traits in Sumbawa cattle. Additionally, the g.446G>C and g.558C>T were also found to be associated with PH and CC traits, respectively. The polymorphisms detected in the GH gene could have implications for selection programs to enhance desired biometric traits in Sumbawa cattle. Improving livestock productivity can be done by understanding genetic diversity and its relationship with phenotypic characteristics.
Topics: Animals; Cattle; Polymorphism, Single Nucleotide; Growth Hormone; Genotype; Indonesia; Gene Frequency; Linkage Disequilibrium; Phenotype; Haplotypes; Female; Male; Biometry
PubMed: 38922197
DOI: 10.1590/1519-6984.282823 -
Metabolites Jun 2024Relative energy deficiency in sport (RED-S) is a condition that arises from persistent low energy availability (LEA), which affects the hypothalamic-pituitary axis and...
Development of an LC-HRMS/MS Method for Quantifying Steroids and Thyroid Hormones in Capillary Blood: A Potential Tool for Assessing Relative Energy Deficiency in Sport (RED-S).
Relative energy deficiency in sport (RED-S) is a condition that arises from persistent low energy availability (LEA), which affects the hypothalamic-pituitary axis and results in alterations of several hormones in both male and female athletes. As frequent blood hormone status determinations using venipuncture are rare in sports practice, microsampling offers promising possibilities for preventing and assessing RED-S. Therefore, this study aimed at developing a liquid chromatography-high-resolution tandem mass spectrometry (LC-HRMS/MS) method for quantifying relevant steroids and thyroid hormones in 30 μL of capillary blood obtained using Mitra devices with volumetric absorptive microsampling technology (VAMS). The results of the study showed that all validation criteria were met, including a storage stability of more than 28 days in a frozen state (-18 °C) and 14 days at room temperature (20 °C). The validated assay provided precise (<12%) and accurate (<13%) results for all the target analytes. Furthermore, as a proof of concept, autonomously collected VAMS samples from 50 female and male, healthy, active adults were analyzed. The sensitivity of all analytes was adequate to quantify the decreased hormone concentrations in the RED-S state, as all authentic samples could be measured accordingly. These findings suggest that self-collected VAMS samples offer a practical opportunity for regular hormone measurements in athletes and can be used for early RED-S assessment and progress monitoring during RED-S recovery.
PubMed: 38921463
DOI: 10.3390/metabo14060328