Form Of Thyroid Hormone Research Articles

Application of selenium for enrichment of wheat flour to obtain a quality final product in accordance with consumer characteristics

Enrichment of flour with microelements and vitamins increases its nutritional value and can solve the urgent problem of improving the health of the population of Kazakhstan through the daily consumption of food products obtained from such flour, for example, bread, bakery, pasta and confectionery products, which are almost always on the tables of Kazakh consumers . Natural sources of many vital micronutrients, unfortunately, are not always available to some categories of our people, so consuming processed products from fortified flour will help compensate for the deficiency of some microelements, for example, iron, iodine and zinc. However, the need to enrich flour with other microelements, no less important for the human body and which are present in products not often consumed by Kazakhstanis, has become the goal of our research, namely an element such as selenium, the main function of which in the body is to maintain the immune system and the formation of thyroid hormones. The article presents the results of research on the development of technology for enriching wheat flour with selenium with the study of the baking properties of fortified flour. The research methodology was based on experimental methods, including the preparation of samples for research, instrumental methods for determining the physicochemical parameters of raw materials, intermediate products and finished products, as well as expert methods for determining the organoleptic properties of the final product. It has been established that the highest and first grades of flour are almost completely absent of any mineral substances, which confirms the conclusion that existing grain processing technologies transfer the mineral elements originally present in the grain into plant waste, which means it needs to be enriched. It has been established that selenium must be used in a form that ensures its safety for the human body - L-Selenomethionine. It has been established that to ensure the body’s daily requirement of selenium, the selenium-flour ratio is 0.15 mcg per 100 g. To control the selenium content in products, it has been established that the most suitable method is Raman spectroscopy using a Romanov microscope - a spectrometer, which allows determine selenium in spectra from 465 to 2900, which confirms the sensitivity of the method to microconcentrations of the element under study. It has been established that the consumer characteristics of finished products obtained using traditional technology from flour enriched with selenium are consistent both in organoleptic and physico-chemical indicators.

Chronic Kidney Disease affects Thyroid Hormones

Kidney disease is one of the causes of death in many countries around the world. This study found that chronic kidney disease affects thyroid hormone formation, release, and storage. The results show a decrease in T3 and T4 thyroid hormones and an increase in TSH hormone in both sexes and people of different ages. The research aims to study the effect of chronic kidney disease on the thyroid gland’s activity and its deficiency’s effect on health ailments. Results showed a significant decrease in T3 concentration in patients at the probability level (p ≤ 0.05) (0.8±0.1) compared with the control group (1.0±0.1). Additionally, a significant decrease in T4 concentration at the probability level (p ≤ 0.05), (6.8±1.5) compared with the control group (8.7±0.9) and a significant increase in TSH concentration at the probability level (p ≤ 0.05), (4.8±0.6) compared with the control group (1.2±0.5). The CDK affects thyroid hormones; low T3 and T4 are the most common thyroid dysfunction. High TSH, enlarged thyroid gland, hypothyroidism, thyroid dysfunction. Keywords: CKD, Thyroid Hormones, Thyroid dysfunction.

Chronic Kidney Disease affects Thyroid Hormones

Kidney disease is one of the causes of death in many countries around the world. This study found that chronic kidney disease affects thyroid hormone formation, release, and storage. The results show a decrease in T3 and T4 thyroid hormones and an increase in TSH hormone in both sexes and people of different ages. The research aims to study the effect of chronic kidney disease on the thyroid gland’s activity and its deficiency’s effect on health ailments. Results showed a significant decrease in T3 concentration in patients at the probability level (p ≤ 0.05) (0.8±0.1) compared with the control group (1.0±0.1). Additionally, a significant decrease in T4 concentration at the probability level (p ≤ 0.05), (6.8±1.5) compared with the control group (8.7±0.9) and a significant increase in TSH concentration at the probability level (p ≤ 0.05), (4.8±0.6) compared with the control group (1.2±0.5). The CDK affects thyroid hormones; low T3 and T4 are the most common thyroid dysfunction. High TSH, enlarged thyroid gland, hypothyroidism, thyroid dysfunction. Keywords: CKD, Thyroid Hormones, Thyroid dysfunction.

Utilization of iodized salt in Halahalaya Hamlet, Kanreapia Village, Gowa Regency

Salt is a dietary supplement and source of electrolytes for the human body. Salt contains iodine. Iodine is a trace mineral that must be present in the body to form thyroid hormones and is beneficial for the body's metabolism. Iodine deficiency leads to goiter disease at various stages, slows growth in children and adults, as well as lowers labour productivity. The purpose of this service activity is to find out the use of iodized salt in Halahalaya Hamlet, Kanreapia Village. This type of service is an observational activity with a population consisting of heads of households in 92 households in Halahalaya Village. Data on the use of iodized salt were collected through interviews and direct observation using questionnaires. The results of the service showed that out of 92 households, 87 households (94.6%) used packaged salt labelled iodine, 5 households (5.4%) did not use packaged salt labelled iodine, iodine test results of 12 households were white (13.0%). ), light purple iodine test results in 20 households (21.7%), dark purple iodine test results in 60 households (65.2%). The conclusion of the service is that the availability of iodized salt in Halahalaya Hamlet, Kanreapia Village is sufficient, but there is still a lack of community understanding of the use of good iodized salt, therefore cross-disciplinary cooperation is needed to a growing community knowledge.

Selenium in Infants and Preschool Children Nutrition: A Literature Review.

Selenium (Se), an essential trace element, is fundamental to human health, playing an important role in the formation of thyroid hormones, DNA synthesis, the immune response, and fertility. There is a lack of comprehensive epidemiological research, particularly the serum Se concetration in healthy infants and preschool children compared to the estimated dietary Se intake. However, Se deficiencies and exceeding the UL have been observed in infants and preschool children. Despite the observed irregularities in Se intake, there is a lack of nutritional recommendations for infants and preschool children. Therefore, the main objective of this literature review was to summarize what is known to date about Se levels and the risk of deficiency related to regular consumption in infants and preschool children.

Pengaruh Pendidikan Kesehatan terhadap Pengetahuan dan Sikap Ibu Hamil tentang Skrining Hipotiroid Bayi Baru Lahir di Wilayah Kerja Puskesmas Kawal

Congenital hypothyroidism, hereinafter abbreviated as HK, is a state of decreased or non-functioning thyroid gland that is acquired from birth onwards. This occurs due to anatomic abnormalities or metabolic disorders in the formation of thyroid hormone or iodine deficiency. The Bintan health office has also implemented the SHK program for newborns. In 2017 SHK had not been implemented at all in Bintan. Whereas in 2019 it was carried out but only 2.7% had just been implemented, namely out of 1353 babies only 49 babies were screened for hypothyroidism and the results of 49 who were screened were declared negative for hypothyroidism. The purpose of this study was to look at the knowledge and attitudes of pregnant women about screening hypothyroid. This study used pre-experimental research methods with pre- and post-test designs. With the aim of knowing the effect of health education on the knowledge and attitudes of pregnant women in carrying out hypothyroid screening in the work area of the Kawal Health Center, with a total population of 30 people and the entire population or total sampling was taken as a sample. The results showed that there were differences in knowledge and attitudes of mothers before and after being given health education. There is an effect of health education on mother's knowledge and attitudes where the p value is 0.003. The conclusion from this study is that there is an influence of mother's knowledge and attitude towards providing health education to pregnant women. hypothyroid.

Epidemiology of Thyroid Cancer.

Epidemiology of Thyroid Cancer.

The correlation between iodine nutrition and autoimmunity among hyperthyroid goiter patients in tertiary care hospital of Tamil Nadu

Background: Iodine is a trace element that is essential for the formation of thyroid hormones. It is essential for the human life’s growth and development. The thyroid gland size and functions affected by deficient or excessive intake of iodine. Iodine excess intake was found to associating with iodine-induced hyperthyroidism (IIH) and autoimmune thyroiditis. Aims and Objectives: The present study was to find the hyperthyroid goiter patient nutritional status by urinary iodine excretion (UIE) measurement and correlate them with thyroid hormone and thyroid autoantibodies. Materials and Methods: In this study, 100 adult hyperthyroid goiter ssubjects and 100 apparently normal adult subjects were conveniently recruited in this study.Urinary iodine estimation and serum TSH, fT4, fT3, AMA, and ATG were estimated,which were estimated for case and control groups. Results: The hyperthyroid goiter patient mean UIE concentration was 278.98 μg/L and 68% of excess UIE which was found. There was significant difference in the UIE between the hyperthyroid goiter patient and control (P<0.001). The following types of goiter, based on palpation, were identified among the 100 hyperthyroid patients: Grade I – 4 %, Grade II – 63%, and Grade III – 33%. There were elevated serum AMA levelswith positive correlation of excess iodine for hyperthyroid goiter patient. Conclusion: In this study, there were excess UIEs among patients; hence, these associated complications, namely, benign goiter (14%), thyroiditis (43%), cancer of thyroid (4%), and thyrotoxicosis (39%) were observed.

Formation of thyroid hormone revealed by a cryo-EM structure of native bovine thyroglobulin

Thyroid hormones are essential regulators of metabolism, development, and growth. They are formed from pairs of iodinated tyrosine residues within the precursor thyroglobulin (TG), a 660-kDa homodimer of the thyroid gland, by an oxidative coupling reaction. Tyrosine pairs that give rise to thyroid hormones have been assigned within the structure of human TG, but the process of hormone formation is poorly understood. Here we report a ~3.3-Å cryo-EM structure of native bovine TG with nascent thyroid hormone formed at one of the predicted hormonogenic sites. Local structural rearrangements provide insight into mechanisms underlying thyroid hormone formation and stabilization.

Are you tired? Low Thyroid may be the Culprit: Part 2

One problem, as noted in Part 1 of this article, is the flawed process of diagnosing thyroid disorders. Even when a patient is obviously symptomatic, his or her condition may go unrecognized by orthodox physicians because they focus so exclusively on the results of conventional thyroid blood tests. These tests do not directly measure the functioning of the entire thyroid system, which includes both the central production of T4 hormone and the conversion of T4 to T3 at the tissue level. This conversion process, which occurs outside of the thyroid gland itself, is essential because T3 is the active form of thyroid hormone that works in the body’s cells.

Selenoproteins in the Human Placenta: How Essential Is Selenium to a Healthy Start to Life?

Selenium is an essential trace element required for human health, and selenium deficiency has been associated with many diseases. The daily recommended intake of selenium is 60 µg/day for adults, which increases to 65 µg/day for women when pregnant. Selenium is incorporated into the 21st amino acid, selenocysteine (sec), a critical component of selenoproteins that plays an important role in a variety of biological responses such as antioxidant defence, reactive oxygen species (ROS) signalling, formation of thyroid hormones, DNA synthesis and the unfolded protein response in the endoplasmic reticulum (ER). Although 25 selenoproteins have been identified, the role of many of these is yet to be fully characterised. This review summarises the current evidence demonstrating that selenium is essential for a healthy pregnancy and that poor selenium status leads to gestational disorders. In particular, we focus on the importance of the placental selenoproteome, and the role these proteins may play in a healthy start to life.

Placental Cryoextract Corrects the Level of Thyroid Hormones in Rats

Effectiveness of cryopreserved placental drug ‘Placental cryoextract’ to correct the reproductive system disorders, occurring against the background of low levels of thyroid hormones, was studied in 50 male rats with mercazolyl hypothyroidism. Using standard test systems for animals, the level of total and free forms of thyroid hormones, total testosterone and estradiol was determined. The morphofunctional state of sperm (number, motility, pathological forms) was traditionally assessed. It was shown that the introduction of the biological product (at a dose of 50–150 μl / kg) restored the functional activity of the thyroid gland of animals, and the lowest dose was more effective. Placental cryoextract also had a dose-dependent effect on the reproductive system of animals with hypothyroidism: the most effective dose was 150 μl / kg, which maximally restored the morphofunctional parameters of sperm and stimulated testosterone production as well as normalized the Ts / E2 ratio. Cryopreserved placenta extract can be considered as a potential drug for the correction of hypothyroidism and reproductive disorders of endocrine origin in male rats.

Біологічна роль йоду та йодна недостатність як патогенетичний фактор виникнення тиреоїдної патології у вагітних та її профілактика

У статті знайшли відображення найбільш важливі наукові відомості про значення йоду в біологічній природі, його участь у різноманітних біологічних процесах, в утворенні тиреоїдних гормонів та реалізації їх ефектів на рівні різних органів і клітин, що пояснюють виникнення йодозалежних захворювань. Значна увага в статті приділяється ролі йоду в синтезі тиреоїдних гормонів при вагітності та з’ясуванню причин підвищеної потреби в цьому елементі при даному стані. Проведений аналіз результатів багаторічних епідеміологічних досліджень, спрямованих на вивчення йодного забезпечення вагітних у різних регіонах України, співробітниками відділу епідеміології ендокринних захворювань ДУ «Інститут ендокринології та обміну речовин ім. В.П. Комісаренка НАМН України». Значна кількість цих досліджень виконана за підтримки МОЗ України, Дитячого фонду ЮНІСЕФ в Україні, а також центру СDC в Атланті (США), який протягом понад 15 років здійснював контроль за якістю досліджень одного з найважливіших показників йодного статусу населення України — йодурії. Стаття підготовлена як науковий інформаційний матеріал для ендокринологів, акушерів-гінекологів, гігієністів, сімейних лікарів, громадськості, МОЗ України у зв’язку з необхідністю законодавчого вирішення проблеми профілактики йодозалежних захворювань в Україні.

Pajanan Pestisida Sebagai Faktor Risiko Kejadian Berat Badan Lahir Rendah (BBLR)

Background:
 Low birth weight (LBW) is one of the causes of infants death. One of the factors that is proven to be associated with LBW incidence is pesticide exposure to pregnant women. The high number of female farmers in the agricultural sector will increase the risk of pesticide exposure in pregnant women.
 Objectives:
 This study aims to describe how pesticide exposure can be a risk factor for the incidence of LBW.
 Research method:
 This study is a systematic study that used meta-synthesis aggregation approach. The search for articles focused on articles that examined the risk factors for pesticide exposure on the incidence of LBW in pregnant women which was conducted on the online databases of Science Direct, Scopus, PubMed, Springer, Google Scholar, and Garuda Portal. The criteria for the articles used were national observational journals indexed at least 4 and indexed international journals published in 2010-2020.
 Result:
 There were 8 articles that match to the criteria and research topic. Factors that were proven to increase the risk of LBW incidence in pregnant women were agricultural activities related to pesticide, participation in agricultural activities, completeness of PPE, storage of pesticide, duration of exposure to pesticide, frequency of exposure to pesticide, amount of pesticide mixture, and types of pesticide used.
 Conclusion:
 Pesticide exposure to pregnant women causes the accumulation of pesticide residues in the body, thus reducing the formation of thyroid hormones and IGF-1 which can cause LBW.
 
 Keywords: low birth weight; pesticide exposure; pregnant women

Pajanan Pestisida Sebagai Faktor Risiko Kejadian Berat Badan Lahir Rendah (BBLR) : Sebuah Kajian Sistematik

Background:
 Low birth weight (LBW) is one of the causes of infants death. One of the factors that is proven to be associated with LBW incidence is pesticide exposure to pregnant women. The high number of female farmers in the agricultural sector will increase the risk of pesticide exposure in pregnant women.
 Objectives:
 This study aims to describe how pesticide exposure can be a risk factor for the incidence of LBW.
 Research method:
 This study is a systematic study that used meta-synthesis aggregation approach. The search for articles focused on articles that examined the risk factors for pesticide exposure on the incidence of LBW in pregnant women which was conducted on the online databases of Science Direct, Scopus, PubMed, Springer, Google Scholar, and Garuda Portal. The criteria for the articles used were national observational journals indexed at least 4 and indexed international journals published in 2010-2020.
 Result:
 There were 9 articles that match to the criteria and research topic. Factors that were proven to increase the risk of LBW incidence in pregnant women were agricultural activities related to pesticide, participation in agricultural activities, completeness of PPE, storage of pesticide, duration of exposure to pesticide, frequency of exposure to pesticide, amount of pesticide mixture, and types of pesticide used.
 Conclusion:
 Pesticide exposure to pregnant women causes the accumulation of pesticide residues in the body, thus reducing the formation of thyroid hormones and IGF-1 which can cause LBW.

Iodoral-Induced Iatrogenic Hypothyroidism

Background: Iodine is essential for the formation of thyroid hormones. Therefore, the thyroid gland is generally able to maintain normal hormone synthesis despite changes in iodine availability. When there is an increase in iodide load, the thyroid gland is able to inhibit the formation of organic iodide via the Wolff-Chaikoff effect (WCE). This prevents the formation of large quantities of thyroid hormones, thus preventing hyperthyroidism1. Continued exposure to excess iodine is also overcome by the “escape” phenomenon and hormone synthesis resumes in a normal fashion2. However, some patients may lack this autoregulation and develop hypothyroidism. Clinical Case: An 86-year-old male with a history of subclinical hypothyroidism initially presented to his PCP for evaluation of cognitive decline. Workup revealed a TSH of 10 mcIU/mL (0.34 – 5.6 mcIU/mL), a normal FT4 and a negative TPOAb. It was subsequently revealed that the patient was started on Iodoral 12.5 mg daily, an iodine/potassium iodide supplement, 1 month prior to presentation by a naturopathic doctor. Prior to all this, his TSH had always ranged between 4 – 6 mcIU/mL for many years. It was recommended that he discontinue Iodoral and repeat thyroid labs in the future. Despite this, the patient continued on varying doses of Iodoral supplementation. Repeat labs obtained 8 months later revealed an elevated TSH of 99 mcIU/mL and a low FT4 of 0.43 ng/mL (0.6 – 2.6 ng/mL). Despite these numbers, he was asymptomatic and did not exhibit any overt signs of hypothyroidism. He was referred to Endocrinology and finally stopped taking Iodoral.7 weeks post-discontinuation, his repeat labs showed a resolution of hypothyroidism and return to his baseline subclinical disease with a TSH of 8.2 mcIU/mL and a normal FT4. A urine iodine/creatinine was normal at 244.2 ug/g (35 – 540 ug/g) indicating that there was no residual iodine excess from the Iodoral. Conclusion: As far as we are aware, we present the first reported case of Iodoral-induced iatrogenic hypothyroidism. As with past cases of iodine-induced hypothyroidism, our patient had underlying thyroid disease in subclinical hypothyroidism which could explain why he was unable to escape from the WCE. The half-life of Iodoral is unknown but it is generally understood that the effects of iodide are reversed between 2 to 4 weeks after withdrawal. Our patient did not repeat his thyroid function tests until 7 weeks post-discontinuation but did demonstrate a return to baseline with no other intervention. Reference: 1. Markou K, Georgopoulos N, Kyriazopoulou V, Vagenakis AG. Iodine-Induced hypothyroidism. Thyroid. 2001 May;11(5):501-10. doi: 10.1089/105072501300176462. PMID: 11396709.2. Torti JF, Correa R. Potassium Iodide. 2020 Oct 12. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan–. PMID: 31194460.

Selenium, Zinc, and Copper Status in Euthyroid Nodular Goiter: A Cross-Sectional Study.

Background:It is known that some elements are needed for normal thyroid gland functions. Iodine and selenium are the most well-known trace elements necessary for thyroid metabolism. Selenium is involved in the formation of thyroid hormones and the structure of the deiodinases associated with the development of the thyroid gland. While the role of zinc in thyroid metabolism is at the T3 receptor level, the role of copper is yet not clear.Objective:To compare the levels of serum trace elements such as selenium, zinc, and copper between the patients with euthyroid nodular goiter and healthy participants.Methods:This cross-sectional study included 98 patients with euthyroid multinodular goiter and 83 healthy subjects without thyroid disease. The demographics, thyroid hormone levels, and thyroid ultrasonography of the participants were recorded. Venous blood samples were centrifuged and sera samples were stored at -80°C until analysis of selenium, zinc, and copper levels. The levels of trace elements were determined by inductively coupled plasma-mass spectrometry (ICP-MS).Results:While serum, zinc, and selenium levels were significantly higher in the control group than the nodular goiter group, the copper levels were similar in the two groups. Trace elements were not correlated with thyroid hormone levels and thyroid volumes. Patients in the nodular goiter group were analyzed according to their solitary and multiple nodule status. The solitary and multiple nodular goiter groups were similar in terms of copper, zinc, and selenium levels.Conclusions:Deficiency of selenium and zinc may be associated with nodular goiter. Replacement of these trace elements may be useful for the prevention of nodular goiter, especially in deficient regions.

The structure of human thyroglobulin

Thyroglobulin (TG) is the protein precursor of thyroid hormones, which are essential for growth, development and the control of metabolism in vertebrates1,2. Hormone synthesis from TG occurs in the thyroid gland via the iodination and coupling of pairs of tyrosines, and is completed by TG proteolysis3. Tyrosine proximity within TG is thought to enable the coupling reaction but hormonogenic tyrosines have not been clearly identified, and the lack of a three-dimensional structure of TG has prevented mechanistic understanding4. Here we present the structure of full-length human thyroglobulin at a resolution of approximately 3.5 A, determined by cryo-electron microscopy. We identified all of the hormonogenic tyrosine pairs in the structure, and verified them using site-directed mutagenesis and in vitro hormone-production assays using human TG expressed in HEK293T cells. Our analysis revealed that the proximity, flexibility and solvent exposure of the tyrosines are the key characteristics of hormonogenic sites. We transferred the reaction sites from TG to an engineered tyrosine donor–acceptor pair in the unrelated bacterial maltose-binding protein (MBP), which yielded hormone production with an efficiency comparable to that of TG. Our study provides a framework to further understand the production and regulation of thyroid hormones. The cryo-electron microscopy structure of human thyroglobulin reveals that proximity, flexibility and solvent exposure are key characteristics of its hormonogenic tyrosine pairs, and provides a framework for understanding the formation of thyroid hormones.

Testing the short-and long-term effects of elevated prenatal exposure to different forms of thyroid hormones.

Maternal thyroid hormones (THs) are known to be crucial in embryonic development in humans, but their influence on other, especially wild, animals remains poorly understood. So far, the studies that experimentally investigated the consequences of maternal THs focused on short-term effects, while early organisational effects with long-term consequences, as shown for other prenatal hormones, could also be expected. In this study, we aimed at investigating both the short- and long-term effects of prenatal THs in a bird species, the Japanese quail Coturnix japonica. We experimentally elevated yolk TH content (the prohormone T4, and its active metabolite T3, as well as a combination of both hormones). We analysed hatching success, embryonic development, offspring growth and oxidative stress as well as their potential organisational effects on reproduction, moult and oxidative stress in adulthood. We found that eggs injected with T4 had a higher hatching success compared with control eggs, suggesting conversion of T4 into T3 by the embryo. We detected no evidence for other short-term or long-term effects of yolk THs. These results suggest that yolk THs are important in the embryonic stage of precocial birds, but other short- and long-term consequences remain unclear. Research on maternal THs will greatly benefit from studies investigating how embryos use and respond to this maternal signalling. Long-term studies on prenatal THs in other taxa in the wild are needed for a better understanding of this hormone-mediated maternal pathway.

Changes in thyroid hormones in patients with chronic acalculous cholecystitis in the practice of a family doctor

Abstract. Among biliary pathology, chronic acalculous cholecystitis (CAC) occupies one of the central places. The important role of the hormonal system in the regulation of the functioning of the biliary tract has been known for a long time, but the specific mechanisms of these influences remained unclear. Based on the results of a comprehensive clinical, laboratory, biochemical and instrumental examination, all patients with chronic acalculous cholecystitis were divided into three groups depending on the variant of impairment of the motor-kinetic function of the gallbladder. The first group consisted of patients with CAC and hypertensive-hyperkinetic gallbladder dyskinesia (group I) – 17 people; the second – patients with CAC with mixed hypotonic-hyperkinetic gallbladder dyskinesia (group II) – 19 people; the third – patients with САС and hypotonic-hypokinetic dyskinesia of gallbladder (III group) – 29 people. The level of free FT3, FT4, and thyroid-stimulating hormone (TSH) was determined by the immunofluorescence method using BREAHMS test systems (Henning Berlin GMBH). The disproportion between the thyroid hormones and the quantitative predominance of the inactive form made it possible to identify the relative hypothyroid syndrome in group I patients. The disproportion between the biologically inactive and active forms of thyroid hormones with a quantitative predominance of the inactive form made it possible to judge the presence of a relative hypothyroid syndrome in group II patients. In group III patients, a significantly increased TSH level was revealed, which was a response of the hypothalamic-pituitary system to a decrease in the level of FT3.