Checking your browser before accessing pubmed.ncbi.nlm.nih.gov · Click here if you are not automatically redirected after 5 seconds

February 8, 2020 - Selective serotonin reuptake inhibitors (SSRI) have been claimed to negatively affect the thyroid function, albeit the evidence is controversial. We s…

Checking your browser before accessing pmc.ncbi.nlm.nih.gov · Click here if you are not automatically redirected after 5 seconds

February 18, 2002 - Thus, the goal of this article is to review the literature on the relationships between thyroid hormones and the brain serotonin (5-HT) system, limited to studies in adult humans and adult animals. In humans, neuroendocrine challenge studies in hypothyroid patients have shown a reduced 5-HT responsiveness that is reversible with thyroid replacement therapy.

Conclusions: Neither fluoxetine nor sertraline was associated with clinically significant changes in thyroid function or thyroid autoimmunity in either primary hypothyroid or normal thyroid function patients with depression. However, results suggest that patients with normal thyroid function who were treated with fluoxetine are more susceptible to minor changes within the serotoninergic system than patients with hypothyroidism on the same SSRI therapy.

The relationship between thyroid hormones and serotonin is of a rather complex nature and not yet fully understood. A review of literature performed by Bauer et al highlights the potential sensitising nature of thyroid hormones for cortical 5-HT2 receptors. This paper also demonstrates the increased cortical concentration of 5-HT associated with experimentally induced hypothyroid states that were corrected with thyroxine.

May 11, 2023 - Here, we report the case of a patient whose thyroid laboratory test results became abnormal when SSRI therapy was initiated. The abnormality was resolved when the medication was changed to a serotonin and norepinephrine reuptake inhibitor (SNRI).

July 24, 2018 - Serotonin helps stimulate thyroid cells or thyrocytes to work. It activates thyroid cell survival and apoptosis or cell death in the thyroid. Imbalances of serotonin in the brain affect thyroid hormones and can be a hidden cause of thyroid symptoms ...

June 23, 2022 - The thyroid hormone has a key role in the release of neurotransmitters, so low levels of it can lead to a decreased level of neurotransmitters as well. Increased levels of serotonin, for instance, has been linked to hypothyroidism. Induced ...

February 1, 2002 - Thus, the goal of this article is to review the literature on the relationships between thyroid hormones and the brain serotonin (5-HT) system, limited to studies in adult humans and adult animals. In humans, neuroendocrine challenge studies in hypothyroid patients have shown a reduced 5-HT responsiveness that is reversible with thyroid replacement therapy.

June 25, 2014 - Another study looked at thyroid axis activity and serotonin function in major depression, and found that serotonin function is reduced in some depressed patients, and hypothalamic-pituitary-thyroid (HPT) axis dysregulation may be a compensatory ...

Thus it is postulated that one mechanism, among others, through which exogenous thyroid hormones may · exert their modulatory effects in affective illness is via an increase in serotonergic neurotransmission, specifically by · reducing the sensitivity of 5-HT1A auto receptors in the raphe area, and by increasing 5-HT2 receptor sensitivity. Key words: Serotonin system, T3,T4, thyroid system, adult brain, 5-HT receptor, mood modulation, affection

July 7, 2009 - Conclusions: Neither fluoxetine nor sertraline was associated with clinically significant changes in thyroid function or thyroid autoimmunity in either primary hypothyroid or normal thyroid function patients with depression. However, results suggest that patients with normal thyroid function who were treated with fluoxetine are more susceptible to minor changes within the serotoninergic system than patients with hypothyroidism on the same SSRI therapy.

December 29, 2011 - We studied the effect of chronic intraperitoneal (ip) administration of serotonin (5-HT) and thyroid function. We injected daily intraperitoneally for 10 days different doses of 5-HT, and measured plasma thyroid hormones and TSH levels. There was a decrease in the plasma levels of T3 and T4 with medium doses of 5-HT (0.2 and 0.4 mg/Kg bw for T3, and 0.2 for T4).

June 30, 2019 - Serotonin helps release TSH from the pituitary, so if there is low serotonin, a vicious cycle begins: less TSH from the pituitary reduces thyroid hormone levels, which reduce serotonin levels.

September 1, 2024 - The potential impact of SSRIs on ... thyroid hormones. Research has demonstrated that SSRIs can influence thyroid function by affecting the hypothalamic-pituitary-thyroid axis....

June 4, 2026 - If you have not lived through several versions of the ultimate test for thyroid then it is harder to grasp this phenomenon. [Dr David Derry] 2. In order to treat depression through the serotonin pathway, the thyroid is an important part of the equation via an increase in serotonergic neurotransmission, specifically by reducing the sensitivity of 5-HT1A autoreceptors in the raphe area, and by increasing 5-HT2 receptor sensitivity.

March 17, 2003 - The serotonin level was significantly increased in 11 nuclei of the hypothyroid and in 12 nuclei of the hyperthyroid rats. The 5-hydroxyindoleacetic acid levels were higher in 16 nuclei of the hypothyroid and 7 nuclei of the hyperthyroid animals. The state of the thyroid gland in adult rats also affected the substance P system but less consistently than the serotonin pathway.

October 4, 2025 - Alterations in thyroid functioning have been of long-standing interest in the research and treatment of depressive disorders. Thyroid hormones may play a role in mood regulation by modulating serotonin and norepinephrine neurotransmission.