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Related Concept Videos

Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

26
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...
26
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

28
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...
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PKC in developmental hypothyroid rat brain.

Hong-Mei Zhang1, Qing Su

  • 1Department of Endocrinology, Xin Hua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200092, People's Republic of China.

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology
|April 1, 2014
PubMed
Summary
This summary is machine-generated.

Thyroid hormone deficiency impairs brain development, affecting learning and memory. Protein kinase C (PKC) isoforms play crucial roles in hypothyroid rat brain damage and apoptosis.

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Cellular Biology

Background:

  • Thyroid hormone (TH) is vital for mammalian central nervous system development.
  • TH deficiency during critical periods causes irreversible cognitive and neurological deficits.
  • Protein kinase C (PKC) isoforms regulate neuronal functions and are implicated in neurological disorders.

Purpose of the Study:

  • To review the roles of PKC isoforms in the developing brain of hypothyroid rats.
  • To understand the molecular mechanisms underlying neurological impairments in congenital hypothyroidism.

Main Methods:

  • This is a review article, synthesizing existing research findings.
  • Focuses on studies investigating PKC isoform expression and activity in hypothyroid rat models.

Main Results:

  • Down-regulation of PKCβ and PKCγ in the hippocampus correlates with impaired learning and memory in hypothyroid rats.
  • Increased PKCα activity in neonatal hypothyroid brains may contribute to oxidative stress and brain damage.
  • Activated pro-apoptotic PKCs, such as PKCδ, lead to significant apoptosis in the hypothyroid rat brain.

Conclusions:

  • Specific PKC isoform alterations are implicated in the neuropathology of congenital hypothyroidism.
  • Targeting PKC pathways may offer therapeutic strategies for mitigating brain damage associated with thyroid hormone deficiency.