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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
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The Parathyroid Glands00:59

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Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
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Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...

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Related Experiment Video

Updated: Jun 18, 2026

Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation
07:13

Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation

Published on: March 14, 2017

Pseudohypoparathyroidism.

C Van Dop, H R Bourne

    Annual Review of Medicine
    |January 1, 1983
    PubMed
    Summary

    Pseudohypoparathyroidism is a group of genetic disorders causing hormone resistance. This resistance, primarily to parathyroid hormone, affects adenylate cyclase activity and leads to varied symptoms and inheritance patterns.

    Area of Science:

    • Endocrinology
    • Genetics
    • Molecular Biology

    Background:

    • Pseudohypoparathyroidism (PHP) encompasses genetic disorders characterized by primary resistance to hormones acting via cyclic adenosine 3':5'-monophosphate (cAMP).
    • Clinical manifestations often stem from parathyroid hormone (PTH) resistance, while other hormone resistances may be subclinical.
    • A significant subgroup, Albright's hereditary osteodystrophy (AHO), displays a distinct phenotype due to deficient membrane protein activity linking hormone receptors to adenylate cyclase.

    Purpose of the Study:

    • To summarize the genotypic diversity and clinical heterogeneity of pseudohypoparathyroidism.
    • To describe the molecular basis of hormone resistance in PHP, focusing on adenylate cyclase signaling.
    • To highlight the variable phenotypic expression and genetic transmission patterns observed in PHP.

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    Last Updated: Jun 18, 2026

    Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation
    07:13

    Two Techniques to Create Hypoparathyroid Mice: Parathyroidectomy Using GFP Glands and Diphtheria-Toxin-Mediated Parathyroid Ablation

    Published on: March 14, 2017

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    07:12

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    03:57

    Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy

    Published on: July 14, 2023

    Main Methods:

    • Review of existing literature on pseudohypoparathyroidism.
    • Analysis of genotypic and phenotypic data from patient cohorts.
    • Examination of molecular mechanisms underlying hormone resistance.

    Main Results:

    • PHP presents as a genetically diverse group of syndromes with varying degrees of hormone resistance.
    • Albright's hereditary osteodystrophy is associated with impaired G-protein signaling and deficient adenylate cyclase stimulation.
    • Phenotypic variability is significant, occurring between and within families, and over time in individuals.

    Conclusions:

    • Pseudohypoparathyroidism is a complex disorder with diverse genetic causes and variable clinical outcomes.
    • Understanding the molecular defects is crucial for managing patients with PHP.
    • Further research into the distinct genetic loci and inheritance patterns is warranted.