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Related Concept Videos

The Parathyroid Glands00:59

The Parathyroid Glands

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The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by...
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Hormones and Bone Tissue01:17

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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.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
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Skeleton and Calcium Homeostasis01:21

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Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
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Synthesis and Functions of Calcitonin00:51

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Calcitonin, a vital polypeptide hormone, regulates calcium levels within body fluids. It is released by the parafollicular cells, also known as C cells, situated in the follicular epithelium of the thyroid gland. Calcitonin responds to fluctuations in blood calcium levels and the influence of gastrointestinal hormones like gastrin and cholecystokinin.
The exact mechanisms by which calcitonin operates in calcium homeostasis remain elusive, but its significance is evident in several vital...
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GPCRs Regulate Adenylyl Cylase Activity01:09

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Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
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Updated: Jun 27, 2025

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy
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TRPC3 Is Downregulated in Primary Hyperparathyroidism.

Emilie Kirstein1, Dirk Schaudien2, Mathias Wagner3

  • 1Institute for Anatomy and Cell Biology, Saarland University, 66421 Homburg, Germany.

International Journal of Molecular Sciences
|April 27, 2024
PubMed
Summary
This summary is machine-generated.

Transient receptor potential canonical (TRPC) channels, specifically TRPC3 and TRPC6, are expressed in human parathyroid glands. TRPC3 levels are lower in primary hyperparathyroidism (pHPT), suggesting a role in hormone regulation.

Keywords:
CaSRTRPC3TRPC6humanimmunohistochemistryparathyroid glandprimary hyperparathyroidism

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Expression and Purification of the Human Lipid-sensitive Cation Channel TRPC3 for Structural Determination by Single-particle Cryo-electron Microscopy
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Area of Science:

  • Physiology
  • Molecular Biology
  • Endocrinology

Background:

  • Calcium homeostasis is critical, involving the parathyroid gland.
  • The role of Transient Receptor Potential Canonical (TRPC) channels, particularly TRPC3 and TRPC6, in parathyroid function is largely unknown.
  • TRPC3 is implicated in calcium homeostasis, but its parathyroid expression is uncharacterized.

Purpose of the Study:

  • To investigate the protein expression of TRPC3 and TRPC6 in healthy and diseased human parathyroid glands.
  • To determine the cellular localization of TRPC3 and TRPC6 within the parathyroid gland.
  • To explore potential differences in TRPC3 and TRPC6 expression in primary hyperparathyroidism (pHPT).

Main Methods:

  • Immunohistochemistry using knockout-validated antibodies against TRPC3 and TRPC6.
  • Analysis of surgical samples from healthy individuals and patients with pHPT.
  • Software-based quantitative analysis (H-score-like).

Main Results:

  • TRPC3 and TRPC6 proteins are expressed in both chief and oxyphilic cells of the human parathyroid gland.
  • This is the first description of TRPC3 and TRPC6 protein expression in parathyroid tissue.
  • TRPC3 staining scores were significantly lower in diseased (pHPT) parathyroid tissue compared to healthy tissue.

Conclusions:

  • TRPC3 and TRPC6 proteins are present in the human parathyroid gland.
  • TRPC3 expression is altered in pHPT, suggesting a role in parathyroid hormone secretion regulation.
  • Further research is needed to confirm these findings and elucidate the functional significance of TRPC3 and TRPC6 in parathyroid physiology and pathology.