Hyperthyroidism and Liver Dysfunction: A Review of a Common Comorbidity

Metabolic and Functional Cross Talk Between the Thyroid and Liver

Background: The liver and thyroid have complicated effects on each other's functions and metabolic homeostasis in the body. Both hypo- and hyperthyroidism influence hepatic carbohydrate and fat metabolism to regulate circulating glucose, cholesterol, and triglyceride levels. Hypothyroidism and "intrahepatic" hypothyroidism also contribute to the development of hypercholesterolemia and metabolic dysfunction-associated steatotic liver disease (MASLD). Likewise, hepatic dysfunction can modulate thyroid function by reducing thyroid hormone (TH) concentrations and their effects on peripheral tissues. Summary: In this review, we examine the impact of thyroid disorders and their treatment on hepatic physiology, metabolism, and pathology, as well as the influence of liver disease on thyroid function. We also describe the clinical and experimental evidence for THs playing significant roles in metabolic conditions such as metabolic syndrome, hyperlipidemia, and MASLD. Additionally, we summarize the current literature on the use of thyromimetics for the treatment of metabolic diseases. Conclusions: Recognizing the effects of the thyroid and THs on hepatic metabolism and fuel utilization, and the liver's role in modulating systemic TH action, is important for optimal clinical management of patients with thyroid and/or liver diseases. New emerging concepts on TH actions in the liver and the efficacy of thyromimetics for the treatment of MASLD have reshaped our understanding of the thyroid-liver relationship and the roles of THs in the pathogenesis and treatment of metabolic diseases.

Therapeutic landscape of metabolic dysfunction-associated steatohepatitis (MASH)

Metabolic dysfunction-associated steatotic liver disease (MASLD) and its severe subgroup metabolic dysfunction-associated steatohepatitis (MASH) have become a global epidemic and are driven by chronic overnutrition and multiple genetic susceptibility factors. The physiological outcomes include hepatocyte death, liver inflammation and cirrhosis. The first therapeutic for MASLD and MASH, resmetirom, has recently been approved for clinical use and has energized this therapeutic space. However, there is still much to learn in clinical studies of MASH, such as the scale of placebo responses, optimal trial end points, the time required for fibrosis reversal and side effect profiles. This Review introduces aspects of disease pathogenesis related to drug development and discusses two main therapeutic approaches. Thyroid hormone receptor-β agonists, such as resmetirom, as well as fatty acid synthase inhibitors, target the liver and enable it to function within a toxic metabolic environment. In parallel, incretin analogues such as semaglutide improve metabolism, allowing the liver to self-regulate and reversing many aspects of MASH. We also discuss how combinations of therapeutics could potentially be used to treat patients.

A comparative study on serum lipid levels in patients with thyroid dysfunction: a single-center experience in Ethiopia

BACKGROUND

Thyroid diseases are the most common endocrine disorders worldwide. Thyroid hormones are essential for lipid synthesis, metabolism, and mobilization. Lipid levels in the blood may be altered when there is thyroid dysfunction. Lipid changes are linked to hyperthyroidism and primarily involve total and low-density lipoprotein cholesterol. The serum lipid profile is negatively impacted by hypothyroidism, which may increase the risk of atherosclerotic disease development. Thus, hypothyroidism constitutes a significant cause of secondary dyslipidemia. However, the results obtained from different studies are inconsistent, and there are few data regarding lipid profiles in thyroid dysfunction patients in the study area. Therefore, this study aimed to assess the lipid profile of thyroid dysfunction patients at Wolaita Sodo University Comprehensive Specialized Hospital from May 1 to June 15, 2021.

METHODS

A comparative cross-sectional study was conducted involving 200 participants (100 thyroid dysfunction patients and 100 age- and sex-matched controls). Socio-demographic and related data were collected from the study participants via a pretested structured questionnaire through face-to-face interviews. Independent sample T tests and Mann‒Whitney U tests were used for data analysis. P < 0.05 indicated statistical significance.

RESULTS

Out of 200 study participants 40 (20%) hyperthyroid, 60 (30%) hypothyroidism, and 100 (50%) controls. In individuals with hyperthyroidism, the levels of triglycerides, total cholesterol, and low-density lipoprotein cholesterol were significantly lower than those in the control group. Compared to the control group, the hypothyroidism patients had significantly higher levels of triglycerides, low-density lipoprotein cholesterol, total cholesterol, and high-density lipoprotein cholesterol.

CONCLUSION

The lipid profile can change significantly as a result of thyroid dysfunction. Biochemical screening of lipid profiles is essential for improving patients with thyroid dysfunction with dyslipidemia.

The selection of target areas for orbital imaging, application of diethylenetriaminepentaacetic acid orbital imaging, clinical factors, alkaline phosphatase, and thyrotropin receptor antibodies in the staging and grading of thyroid-associated ophthalmopathy

PURPOSE

This study aimed to investigate the active phase of thyroid-associated ophthalmopathy (TAO), its correlations with clinical factors, serological tests, and orbital imaging parameters, and evaluate the diagnostic value of different orbital imaging target areas.

METHODS

A total of 45 patients with thyroid-related eye disease underwent imaging, serological tests, and clinical data collection. Clinical Activity Score (CAS) assessment, diplopia scores, and NOSPECS grading were conducted. Radioactive counts of extraocular muscles and tear glands were measured. Computed tomography scans assessed exophthalmos and extraocular muscle thickening. Correlations and differences among study parameters and grades were evaluated using receiver operating characteristic curves.

RESULTS

Active TAO correlated significantly with radioactive counts of muscles and tear glands, alkaline phosphatase (ALP), thyrotropin receptor antibody (TRAb), and age. Significant differences were found among NOSPECS grades for studied variables (except ALP and TRAb). Extraocular muscle thickening was confirmed as a reliable diagnostic criterion. High consistency was found between orbital imaging and CAS staging. Treatment showed varying degrees of improvement in active patients, while nonactive patients showed no progression during follow-up. Receiver operating characteristic curves demonstrated high diagnostic efficacy for tear gland radioactive counts.

CONCLUSION

Tear glands and extraocular muscles have high diagnostic value in TAO, with tear glands showing a higher value. Orbital imaging provides an objective and comprehensive assessment compared with CAS scoring alone. ALP, TRAb, and age also play significant roles in staging.

Unusual Management of a Rare Case of Methimazole-Resistant Graves Disease

As the leading cause of hyperthyroidism, Graves disease (GD) does not often present with its classical triad of pretibial myxedema, goiter, and exophthalmos but instead is often recognized by various manifestations such as tachycardia, weight loss, jaundice, or dermatopathy and requires utmost clinical vigilance. Three treatment modalities for GD exist as antithyroid drugs (ATDs), radioactive iodine (RAI), and surgery, but each bears its own serious side effects. Furthermore, there have been several reports in the literature about ATD resistance that can complicate management. We describe a rare complex case of methimazole (MMI)-resistant GD in a 58-year-old woman with multiple comorbidities including heart failure, atrial fibrillation, liver cirrhosis, and hypertension. She presented with an initial complaint of diffuse swelling and was found to have severe thyrotoxicosis. Despite high doses of MMI, her thyroid function remained significantly elevated. Thyroid uptake and scan while on MMI showed high radioactive iodine uptake. After receiving RAI therapy, her thyroid function and bilirubin improved markedly, liver enzymes remained stable, and anasarca responded to diuretics. This case highlights the challenges in managing resistant GD and emphasizes the necessity of personalized treatment plans.

Iodine-131 Combined With Plasma Exchange Treatment in Graves' Hyperthyroidism Patients With Severe Liver Injury Whose Average Model for End-Stage Liver Disease Scores >20

Background and Aims

The purpose of this retrospective study is to describe the Graves' hyperthyroidism patients with severe liver injury treated by iodine-131 combined with plasma exchange (PE).

Methods

The patients who had hyperthyroidism caused by Graves' disease, with severe liver injury (The level of total bilirubin ≥12 mg/dL), and after 1 week of liver protective medication treatment, the patient's liver function did not improve, were enrolled in this study. All patients were treated with iodine-131 and PE. The patients' laboratory data after 3 months of isotope therapy were collected.

Results

In this study, there were 8 patients included, the average model for end-stage liver disease (MELD) scores were greater than 20 (ranges from 19 to 30) at baseline. The levels of hemoglobin, platelet count, alanine aminotransferase, aspartate aminotransferase, total bilirubin, direct bilirubin, alkaline phosphatase, glutamyl transpeptidase, MELD scores, free triiodothyronine, free thyroxine, antithyroid peroxidase autoantibody and serum thyrotropin receptor antibodies after PE treatment were significantly lower than before PE treatment (P < .05). The level of total bilirubin at 3 months post-131I treatment was significantly lower than pre-131I treatment (P = .0200), the same was the level of direct bilirubin (P = .0200).

Conclusion

Our study enrolled Graves' hyperthyroidism patients with severe liver injury whose average MELD scores were greater than 20, and shows that liver function test can recover on about 3 months treated iodine-131 combined with PE therapy.

Liver Dysfunction in a Patient with Graves' Disease

Liver dysfunction can occur in patients presenting with thyrotoxicosis, due to several different aetiologies. A 42-year-old man had mild liver dysfunction on presentation with hyperthyroidism due to Graves' disease (GD): ALT 65 (0-45 IU/L), fT4 41.2 (9-23 pmol/L), fT3 > 30.7 (2.4-6 pmol/L), and TSH < 0.01 (0.3-4.2 mIU/L). His liver dysfunction worsened following the initiation of the antithyroid drug (ATD) carbimazole (CBZ), with ALT reaching a zenith of 263 IU/L at 8 weeks following presentation. Consequently, CBZ was stopped, and he was managed with urgent radioiodine therapy. His liver function tests (LFTs) improved within 1 week of stopping carbimazole (ALT 74 IU/L). Thionamide-induced liver dysfunction is more typically associated with a 'cholestatic' pattern, although he had a 'hepatitic' pattern of liver dysfunction. The risk of liver dysfunction in GD increases with older age and higher titres of thyroid-stimulating hormone receptor antibody (TRAb). This review of the literature seeks to explore the possible causes of liver dysfunction in a patient presenting with hyperthyroidism, including thyrotoxicosis-induced liver dysfunction, ATD-related liver dysfunction, and the exacerbation of underlying unrelated liver disease.

Liver Dysfunction in Hyperthyroidism

Background

Thyrotoxicosis is often associated with abnormal liver tests. This study aimed to characterize the clinical features and laboratory findings in thyrotoxic patients with liver abnormalities and to identify predictive factors for differentiating thyroid storm within this population.

Methods

This is a retrospective review of thyrotoxic patients with hepatic dysfunction between January 2015, and January 2021, at Siriraj Hospital, Thailand. Univariate and multivariate analyses were performed to identify the factors associated with thyroid storm.

Results

Among 771 thyrotoxic patients, 43 revealed abnormal liver tests within six months of diagnosis (5.58%). The mean age was 53.16 ± 15.10 years, with a female predominance (60.5%), and the majority (97.7%) were diagnosed with Graves' disease. The most common comorbidities were atrial fibrillation, heart failure, and dyslipidemia. Hepatic dysfunction presented as non-specific, with 46.5% showing a cholestatic pattern, 30.2% a mixed pattern, and 20.9% a hepatocellular pattern. The most possible etiologies of hepatic dysfunction were hyperthyroidism-related hepatitis (41.9%) with atrial fibrillation with congestive hepatopathy (38.9%), concomitant with chronic hepatitis C infection (14.0%), and methimazole-induced hepatic dysfunction (9.3%). The younger age, congestive heart failure, and total bilirubin levels ≥ 3.0 mg/dL were independent factors in distinguishing clinical thyroid storm among thyrotoxic patients without thyroid storm.

Conclusion

Liver abnormalities can be observed in patients with thyrotoxicosis. The possible causes are multifactorial, including hyperthyroidism-related hepatitis, atrial fibrillation with congestive hepatopathy, and chronic hepatitis C infection. Younger age, congestive heart failure, and total bilirubin ≥ 3.0 mg/dL were predictive factors for thyroid storm diagnosis among thyrotoxic patients.

Pancytopenia, Cholestatic Jaundice, and Pulmonary Hypertension: Rare Extrathyroidal Manifestations of Graves' Disease

Pancytopenia, cholestatic jaundice, and pulmonary hypertension are rare but serious complications of thyrotoxicosis. It is uncommonly seen in patients with hyperthyroidism and may result in treatment-related dilemmas as bone marrow suppression and drug-induced liver injury are known complications of anti-thyroid treatment.  We describe a case of Graves' disease presenting with all three manifestations of pancytopenia, cholestatic jaundice, and pulmonary hypertension during a relapse of thyrotoxicosis. Her anti-thyroid medications were initially withheld for fear of worsening the above manifestations, but no improvement was noted clinically or biochemically. Other lab investigations, such as hepatitis serology, autoimmune liver markers, and ultrasound, were unrevealing. Anti-thyroid medications were subsequently reinitiated after discussion with the endocrine team, with improvements in clinical condition, as well as full blood counts and liver function tests. Pulmonary hypertension also improved on her latest echocardiography.  This case report intends to shed light on the atypical extrathyroidal manifestations of Grave's disease and the importance of recognition and therapy.

Role of Nonalcoholic Fatty Liver Disease in Periodontitis: A Bidirectional Relationship

Nonalcoholic fatty liver disease (NAFLD) and periodontitis share common risk factors such as obesity, insulin resistance (IR), and dyslipidemia, which contribute to systemic inflammation. It has been suggested that a bidirectional relationship exists between NAFLD and periodontitis, indicating that one condition may exacerbate the other. NAFLD is characterized by excessive fat deposition in the liver and is associated with low-grade chronic inflammation. There are several risk factors for the development of NAFLD, including gender, geriatric community, race, ethnicity, poor sleep quality and sleep deprivation, physical activity, nutritional status, dysbiosis gut microbiota, increased oxidative stress, overweight, obesity, higher body mass index (BMI), IR, type 2 diabetes mellitus (T2DM), metabolic syndrome (MetS), dyslipidemia (hypercholesterolemia), and sarcopenia (decreased skeletal muscle mass). This systemic inflammation can contribute to the progression of periodontitis by impairing immune responses and exacerbating the inflammatory processes in the periodontal tissues. Furthermore, individuals with NAFLD often exhibit altered lipid metabolism, which may affect oral microbiota composition, leading to dysbiosis and increased susceptibility to periodontal disease. Conversely, periodontitis has been linked to the progression of NAFLD through mechanisms involving systemic inflammation and oxidative stress. Chronic periodontal inflammation can release pro-inflammatory cytokines and bacterial toxins into the bloodstream, contributing to liver inflammation and exacerbating hepatic steatosis. Moreover, periodontitis-induced oxidative stress may promote hepatic lipid accumulation and IR, further aggravating NAFLD. The interplay between NAFLD and periodontitis underscores the importance of comprehensive management strategies targeting both conditions. Lifestyle modifications such as regular exercise, a healthy diet, and proper oral hygiene practices are crucial for preventing and managing these interconnected diseases. Additionally, interdisciplinary collaboration between hepatologists and periodontists is essential for optimizing patient care and improving outcomes in individuals with NAFLD and periodontitis.

Effective substances and molecular mechanisms guided by network pharmacology: An example study of Scrophulariae Radix treatment of hyperthyroidism and thyroid hormone-induced liver and kidney injuries

ETHNOPHARMACOLOGICAL RELEVANCE

Scrophulariae Radix (Xuanshen [XS]) has been used for several years to treat hyperthyroidism. However, its effective substances and pharmacological mechanisms in the treatment of hyperthyroidism and thyroid hormone-induced liver and kidney injuries have not yet been elucidated.

AIM OF THE STUDY

This study aimed to explore the pharmacological material basis and potential mechanism of XS therapy for hyperthyroidism and thyroid hormone-induced liver and kidney injuries based on network pharmacology prediction and experimental validation.

MATERIALS AND METHODS

Based on 31 in vivo XS compounds identified using ultra-performance liquid chromatography tandem quadruple exactive orbitrap high-resolution accurate-mass spectrometry (UPLC-QE-HRMS), a network pharmacology approach was used for mechanism prediction. Systematic networks were constructed to identify the potential molecular targets, biological processes (BP), and signaling pathways. A component-target-pathway network was established. Mice were administered levothyroxine sodium through gavage for 30 d and then treated with different doses of XS extract with or without propylthiouracil (PTU) for 30 d. Blood, liver, and kidney samples were analyzed using an enzyme-linked immunosorbent assay (ELISA) and western blotting.

RESULTS

A total of 31 prototypes, 60 Phase I metabolites, and 23 Phase II metabolites were tentatively identified in the plasma of rats following the oral administration of XS extract. Ninety-six potential common targets between the 31 in vivo compounds and the diseases were identified. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis revealed that Bcl-2, BAD, JNK, p38, and ERK1/2 were the top targets. XS extract with or without PTU had the following effects: inhibition of T3/T4/fT3/fT4 caused by levothyroxine; increase of TSH levels in serum; restoration of thyroid structure; improvement of liver and kidney structure and function by elevating the activities of anti-oxidant enzymes catalase (CAT),superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px); activation anti-apoptotic proteins Bcl-2; inhibition the apoptotic protein p-BAD; downregulation inflammation-related proteins p-ERK1/2, p-JNK, and p-p38; and inhibition of the aggregation of pro-inflammatory cytokines TNF-α, IL-1β, and IL-6, as well as immune cells in the liver.

CONCLUSION

XS can be used to treat hyperthyroidism and liver and kidney injuries caused by thyroid hormones through its anti-oxidant, anti-inflammatory, and anti-apoptotic properties. In addition, serum pharmacochemical analysis revealed that five active compounds, namely 4-methylcatechol, sugiol, eugenol, acetovanillone, and oleic acid, have diverse metabolic pathways in vivo and exhibit potential as effective therapeutic agents.

A young patient with Graves' disease presenting with a triad of heart failure, pancytopenia, and jaundice: A case report

Key Clinical Message

Graves's disease must be treated promptly to avoid serious sequelae such as cardiomyopathy, liver injury, and pancytopenia. Early initiation of antithyroid medications and beta blockers could not be overrated even in the presence of these complications.

Abstract

Graves' disease causes a large spectrum of clinical manifestations. Delayed diagnosis and management of Graves' disease could lead to serious systemic sequelae. We describe a case of a young man who presented with progressive cough, increased abdominal girth and ankle swelling for a few months. On examination, he had jaundice, bilateral exophthalmos, diffuse goiter, ascites, and significant lower limb edema. Laboratory investigations showed increased Thyroxin level with a suppressed thyroid stimulating hormone and positive anti-thyrotropin receptor antibodies. Also, the patient had pancytopenia, coagulopathy and cholestatic pattern of elevated liver enzymes. Echocardiography demonstrated mildly reduced left ventricular function with diastolic dysfunction, but electrocardiogram did not show atrial fibrillation. Despite the concerns about using antithyroid medications in patients with impaired liver function tests and pancytopenia, the patient improved dramatically without worsening of his hematological or biochemical parameters. Early initiation of antithyroid medications and beta blockers is essential for patients who are newly diagnosed with hyperthyroidism.

From liver to hormones: The endocrine consequences of cirrhosis

Hepatocrinology explores the intricate relationship between liver function and the endocrine system. Chronic liver diseases such as liver cirrhosis can cause endocrine disorders due to toxin accumulation and protein synthesis disruption. Despite its importance, assessing endocrine issues in cirrhotic patients is frequently neglected. This article provides a comprehensive review of the epidemiology, pathophysiology, diagnosis, and treatment of endocrine disturbances in liver cirrhosis. The review was conducted using the PubMed/Medline, EMBASE, and Scielo databases, encompassing 172 articles. Liver cirrhosis is associated with endocrine disturbances, including diabetes, hypoglycemia, sarcopenia, thyroid dysfunction, hypogonadotropic hypogonadism, bone disease, adrenal insufficiency, growth hormone dysfunction, and secondary hyperaldosteronism. The optimal tools for diagnosing diabetes and detecting hypoglycemia are the oral glucose tolerance test and continuous glucose monitoring system, respectively. Sarcopenia can be assessed through imaging and functional tests, while other endocrine disorders are evaluated using hormonal assays and imaging studies. Treatment options include metformin, glucagon-like peptide-1 analogs, sodium-glucose co-transporter-2 inhibitors, and insulin, which are effective and safe for diabetes control. Established standards are followed for managing hypoglycemia, and hormone replacement therapy is often necessary for other endocrine dysfunctions. Liver transplantation can address some of these problems.

Co-Morbid Hypothyroidism and Liver Dysfunction: A Review

The liver and thyroid hormones interact at multiple levels to maintain homoeostasis. The liver requires large adequate amounts of thyroid hormones to execute its metabolic functions optimally, and deficiency of thyroid hormones may lead to liver dysfunction. Hypothyroidism has been associated with abnormal lipid metabolism, non-alcoholic fatty liver disease (NAFLD), hypothyroidism-induced myopathy, hypothyroidism-associated gallstones and occasionally, interferon-induced thyroid dysfunction. NAFLD remain an important association with hypothyroidism and further studies are needed that specifically compare the natural course of NAFLD secondary to hypothyroidism and primary NAFLD. Hepatic dysfunction associated with hypothyroidism is usually reverted by normalizing thyroid status. Large scale studies geared towards finding new and effective therapies, especially for NAFLD are needed. The clinician must be aware that there exists overlapping symptomatology between liver dysfunction and severe hypothyroidism which may make delay the diagnosis and treatment of hypothyroidism; this requires a high index of suspicion.

Melissa officinalis extract palliates redox imbalance and inflammation associated with hyperthyroidism-induced liver damage by regulating Nrf-2/ Keap-1 gene expression in γ-irradiated rats

BACKGROUND

Melissa officinalis (MO) is a well-known medicinal plant species used in the treatment of several diseases; it is widely used as a vegetable, adding flavour to dishes. This study was designed to evaluate the therapeutic effect of MO Extract against hyperthyroidism induced by Eltroxin and γ-radiation.

METHODS

Hyperthyroidism was induced by injecting rats with Eltroxin (100 µg/kg/ day) for 14 days and exposure to γ-radiation (IR) (5 Gy single dose). The hyperthyroid rats were orally treated with MO extract (75 mg/kg/day) at the beginning of the second week of the Eltroxin injection and continued for another week. The levels of thyroid hormones, liver enzymes and proteins besides the impaired hepatic redox status and antioxidant parameters were measured using commercial kits. The hepatic gene expression of nuclear factor erythroid 2-related factor 2 (Nrf2) and its inhibitor Kelch-like ECH-associated protein-1(Keap-1) in addition to hepatic inflammatory mediators including tumor necrosis factor-α (TNF- α), Monocyte chemoattractant protein-1 (MCP-1) and fibrogenic markers such as transforming growth factor-beta1 (TGF-β1) were determined.

RESULTS

MO Extract reversed the effect of Eltroxin + IR on rats and attenuated the thyroid hormones. Moreover, it alleviated hyperthyroidism-induced hepatic damage by inhibiting the hepatic enzymes' activities as well as enhancing the production of proteins concomitant with improving cellular redox homeostasis by attenuating the deranged redox balance and modulating the Nrf2/Keap-1 pathway. Additionally, MO Extract alleviated the inflammatory response by suppressing the TNF- α and MCP-1 and prevented hepatic fibrosis via Nrf2-mediated inhibition of the TGF-β1/Smad pathway.

CONCLUSION

Accordingly, these results might strengthen the hepatoprotective effect of MO Extract in a rat model of hyperthyroidism by regulating the Nrf-2/ Keap-1 pathway.

Thyrotoxic Cardiomyopathy Unveiled: Insights From a Compelling Case Report

Thyrotoxicosis is a clinical condition characterized by inappropriately elevated thyroid hormone levels in the bloodstream, leading to systemic effects on the body. In fact, the thyrotoxic state has tight regulatory control over the cardiovascular system through genomic and non-genomic mechanisms. This study highlights a rare presentation of thyrotoxic cardiomyopathy (TCM), which, to the best of our knowledge, is one of the very few case reports involving heart failure with preserved ejection fraction (HFpEF) and only atrial involvement, compared to the previous literature. A 37-year-old female presented to the outpatient clinic with abdominal distention and neglected signs and symptoms consistent with thyrotoxicosis for a year. Investigations revealed high N-terminal pro-b-type natriuretic peptide (NT-proBNP) levels of 1788 pg/mL. Cardiac MRI and trans-thoracic echocardiogram (TTE) revealed bilateral atrial dilatation, a left ventricular ejection fraction (LVEF) of 60%, and diastolic dysfunction. Additionally, severe free-flowing tricuspid and mitral valve regurgitation were observed, with no evidence of pericardial effusion or ventricular abnormalities. Therefore, a diagnosis of TCM was suspected and eventually confirmed by excluding other differential diagnoses. Besides a diffuse goiter on ultrasonography, the thyroid panel test revealed low thyroid-stimulating hormone (TSH) levels of <0.01 mIU/L, a free thyroxine T4 of >100 pmol/L, and positive anti-thyroid peroxidase (TPO) and TSH receptor antibodies. Accordingly, a team of endocrinologists, cardiologists, and internists managed the patient with anti-thyroid medications alongside symptomatic treatment. A few days later, she was discharged in good condition, and a follow-up visit was arranged with the endocrinology and cardiology clinics. It is crucial to maintain a high level of suspicion to detect and treat TCM promptly, and a multidisciplinary approach should ideally be employed. This is not only important for the prevention of but also reversing potentially life-threatening cardiovascular complications.

Endocrine aspects of metabolic dysfunction-associated steatotic liver disease (MASLD): Beyond insulin resistance

While the association of metabolic dysfunction-associated steatotic liver disease (MASLD) with obesity and insulin resistance is widely appreciated, there are a host of complex interactions between the liver and other endocrine axes. While it can be difficult to definitively distinguish direct causal relationships and those attributable to increased adipocyte mass, there is substantial evidence of the direct and indirect effects of endocrine dysregulation on the severity of MASLD, with strong evidence that low levels of growth hormone, sex hormones, and thyroid hormone promote the development and progression of disease. The impact of steroid hormones, e.g. cortisol and dehydroepiandrosterone, and adipokines is much more divergent. Thoughtful assessment, based on individual risk factors and findings, and management of non-insulin endocrine axes is essential in the evaluation and management of MASLD. Multiple therapeutic options have emerged that leverage various endocrine axes to reduce the fibroinflammatory cascade in MASH.

Associations of serum keratin 1 with thyroid function and immunity in Graves' disease

BACKGROUND

Autoimmune thyroid disease (AITD) can cause enormous health burdens; however, trustworthy biomarkers in identifying the onset and progression of AITD are limited. In this study, we attempted to discover new potential serum biomarkers to discriminate AITD using mass spectrometry (MS).

METHODS

In the biomarker study cohort, 20 patients with Graves' disease (GD), 20 patients with Hashimoto's thyroiditis (HT), and 20 healthy controls were enrolled for a liquid chromatographic-tandem MS assessment. A novel biomarker, keratin 1 (KRT1), was selected for further evaluation in the validation cohort, including 125 patients with GD, 34 patients with HT, and 77 controls. Relationships of serum KRT1 with AITD-related immunomodulatory cytokines were also analyzed using enzyme-linked immunosorbent assays (ELISAs).

RESULTS

In the MS analysis, KRT1 was the single marker overexpressed in GD, while it was underexpressed in HT. In the ELISA analysis of the validation cohort, KRT1 was consistently upregulated in GD, while it was not downregulated in HT. There were significant associations of KRT1 levels with thyroid function in GD, AITD, and overall subjects. Additionally, a significant association of KRT1 levels with thyroid-stimulating hormone receptor antibody (TSHRAb) levels was observed. Moreover, there were significant associations of KRT1 with osteopontin (OPN) and B-cell activating factor (BAFF) levels in GD.

CONCLUSIONS

Serum KRT1 levels were upregulated in GD and were associated with thyroid function and TSHRAb levels. Moreover, KRT1 was correlated with the BAFF and OPN levels in GD patients. Further molecular-based research to elucidate the role of KRT1 in the pathogenesis of AITD is needed.

Compensatory Increase of Serum Hepassocin Protects Hyperthyroidism-Induced Hepatic Dysfunction

Hepatic dysfunction is commonly observed in subjects with hyperthyroidism. Hepassocin is a hepatokine playing an important role in metabolic diseases and exhibiting a hepatic protective effect. Nevertheless, the relationship between hepassocin and hyperthyroidism was still unknown. In the present study, a total of 36 subjects with Graves' disease were enrolled, and we found that the alanine aminotransferase (ALT) levels were significantly decreased in parallel with the decrement in serum hepassocin concentrations at 6 months after standard treatment for hyperthyroidism. In addition, HepG2 cell line was used to investigate the role of hepassocin in hyperthyroidism-induced hepatic dysfunction. Treatment of hepassocin recombinant protein in HepG2 cells dose-dependently decreased triiodothyronine (T3)-induced ALT and aspartate aminotransferase (AST) elevation. Moreover, hepassocin significantly increased the expression of phosphoenolpyruvate carboxykinase (PEPCK) in a dose-dependent manner. Deletion of hepassocin in HepG2 cells reversed the effects of T3 on PEPCK expressions. Furthermore, we found that T3 increased the expression of hepassocin through a hepatocyte nuclear factor 1α-dependent pathway. Taken together, these results indicated a compensatory increase in serum hepassocin might have a protective role in hyperthyroidism-induced hepatic dysfunction.

Clinical manifestations and early effectiveness of methimazole in patients with graves' hyperthyroidism-related severe hepatic dysfunction

BACKGROUND

Graves' hyperthyroidism (GH) is often accompanied by mild to moderate liver injury, but severe hepatic dysfunction (SHD) is relatively rare. Whether patients with GH-related SHD can be treated with methimazole (MMI) remains controversial. This study aimed to determine the clinical characteristics and to evaluate the role of low-dose MMI for such patients.

METHODS

33 patients with GH-related SHD were selected for this retrospective study in the Fifth Medical Center of Chinese PLA General Hospital from January 2017 to July 2022. The clinical manifestations, therapeutic responses, and effectiveness of MMI were evaluated.

RESULTS

Systemic jaundice (100.0%), yellow urine (100.0%), fatigue (87.9%), and goiter (66.7%) were the main symptoms. Total bilirubin (TBIL) had no linear correlation with free triiodothyronine (FT3) (r = -0.023, p = .899), free thyroxine (FT4) (r = 0.111, p = .540), T3 (r = -0.144, p = .425), and T4 (r = 0.037, p = .837). On the 14th day after admission, FT3, FT4, T3, T4, TBIL, direct bilirubin (DBIL), alanine transaminase (ALT), aspartate transaminase (AST), alkaline phosphatase (ALP), γ-glutamyltransferase (GGT), and international normalized ratio (INR) decreased compared with the baseline (p < .05). The decrease rates of FT3, FT4, T3, T4, TBIL, and DBIL in the MMI group were higher than those in the non-MMI group (p < .05). The improvement rate of the MMI group (77.8%) was higher than that of the non-MMI group (9.5%, p = .001). MMI treatment is an independent predictor affecting the early improvement of patients (OR = 0.022, p = .010).

CONCLUSIONS

The main clinical manifestations of patients with GH-related SHD were symptoms related to liver disease. Low-dose MMI was safe and effective for them.

Graves' disease as a driver of depression: a mechanistic insight

Graves' disease (GD) is characterized by diffuse enlargement and overactivity of the thyroid gland, which may be accompanied by other physical symptoms. Among them, depression can dramatically damage patients' quality of life, yet its prevalence in GD has not received adequate attention. Some studies have established a strong correlation between GD and increased risk of depression, though the data from current study remains limited. The summary of mechanistic insights regarding GD and depression has underpinned possible pathways by which GD contributes to depression. In this review, we first summarized the clinical evidence that supported the increased prevalence of depression by GD. We then concentrated on the mechanistic findings related to the acceleration of depression in the context of GD, as mounting evidence has indicated that GD promotes the development of depression through various mechanisms, including triggering autoimmune responses, inducing hormonal disorders, and influencing the thyroid-gut-microbiome-brain axis. Finally, we briefly presented potential therapeutic approaches to decreasing the risk of depression among patients with GD.

Alkaline Phosphatases: Biochemistry, Functions, and Measurement

Alkaline phosphatases (ALPs) are a group of isoenzymes, situated on the external layer of the cell membrane; they catalyze the hydrolysis of organic phosphate esters present in the extracellular space. Zinc and magnesium are significant co-factors for the biological activity of these enzymes. Although ALPs are available in various body tissues and have distinct physiochemical properties, they are true isoenzymes since they catalyze a similar reaction. In the liver, ALP is cytosolic and present in the canalicular membrane of the hepatocytes. ALPs are available in placenta, ileal mucosa, kidney, bone, and liver. However, most of the ALPs in serum (over 80%) are delivered from liver and bone and in more modest quantities from the intestines. Despite the fact that alkaline phosphatases are found in numerous tissues all through the body, their exact physiological function remains largely unknown.

The role of thyroid function in female and male infertility: a narrative review

PURPOSE

We herein aimed to review the new insights into the impact of impaired thyroid function on male and female fertility, spacing from spontaneous pregnancy to ART, with the objective of providing an updated narrative revision of the literature.

METHODS

This narrative review was performed for all available prospective, retrospective and review articles, published up to 2021 in PubMed. Data were extracted from the text and from the tables of the manuscript.

RESULTS

Thyroid dysfunction is frequently associated with female infertility, whereas its link with male infertility is debated. Female wise, impaired function is detrimental to obstetric and fetal outcomes both in spontaneous pregnancies and in those achieved thanks to assisted reproduction technologies (ART). Furthermore, the reference range of TSH in natural pregnancy and ART procedures has recently become a matter of debate following recent reports in this field. On the other hand, the impact of thyroid function on the male reproductive system is less clear, although a possible role is suggested via modulation of Sertoli and Leydig cells function and spermatogenesis.

CONCLUSION

Thyroid function should be carefully monitored in both male and female, in couples seeking spontaneous pregnancy as well as ART, as treatment is generally immediate and likely to improve chances of success.

Current management of liver diseases and the role of multidisciplinary approach

Liver is an organ having extremely diversified functions, ranging from metabolic and synthetic to detoxification of harmful chemicals. The multifunctionality of the liver in principle requires the multidisciplinary and pluralistic interventions for its management. Several studies have investigated liver function, dysfunction and clinic. This editorial work discusses new ideas, challenges and perspectives of current research regarding multidisciplinary and pluralistic management of liver diseases. In one hand the discussions have carried out on the involvement of extracellular vesicles, Na+/H+ exchangers, severe acute respiratory syndrome coronavirus 2 and Epstein-Barr virus infections, Drug-induced liver injury, sepsis, pregnancy, and food supplements in hepatic disorders. In the other hand this study has discussed hepatocellular carcinoma algorithms and new biochemical and imaging experiments pertaining to liver diseases. Relevant articles with an impact index value "> 0" from reference citation analysis, which is an open multidisciplinary citation analysis database based on artificial intelligence technology, have served for the study's argumentation. This work may be a useful tool for the clinical practice and research in managing and investigating liver disorders.