PI3K/PTEN/Akt and TSC/mTOR signaling pathways, ovarian dysfunction, and infertility: an update

Annu Makker1, Madhu Mati Goel2, Abbas Ali Mahdi2

  • 1Post-Graduate Department of PathologyDepartment of BiochemistryKing George's Medical University, Lucknow 226003, Uttar Pradesh, India annumakker@gmail.com.

Insights

Key signaling pathways, PI3K/PTEN/Akt and TSC/mTOR, regulate ovarian function. Their dysregulation is linked to female infertility, impacting oogenesis and folliculogenesis.

Area of Science:

  • Reproductive Biology
  • Molecular Endocrinology

Background:

  • Ovarian function relies on precise regulation of oogenesis and folliculogenesis.
  • Defects in these processes are a major cause of female reproductive deficiency.
  • The PI3K/PTEN/Akt and TSC/mTOR signaling pathways are implicated in ovarian cell regulation.

Purpose of the Study:

  • To review the role of PI3K/PTEN/Akt and TSC/mTOR pathways in mammalian oogenesis and folliculogenesis.
  • To explore the association between these pathways and female infertility.

Main Methods:

  • Literature review of existing research on PI3K/PTEN/Akt and TSC/mTOR signaling in ovarian function.
  • Analysis of studies linking pathway dysregulation to infertility.

Main Results:

  • These pathways are crucial for primordial follicle dynamics, granulosa cell development, and oocyte maturation.
  • Dysfunction of these pathways correlates with impaired follicular development and ovulation.
  • Aberrant signaling contributes to infertility by disrupting key reproductive events.

Conclusions:

  • The PI3K/PTEN/Akt and TSC/mTOR pathways are essential for normal ovarian function.
  • Understanding these pathways offers insights into the molecular basis of female infertility.
  • Targeting these pathways may hold potential for future infertility treatments.

Related Concept Videos

PI3K/mTOR/AKT Signaling Pathway01:22

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
5.1K
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
3.6K
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

1.4K
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
4.6K
Oogenesis02:07

Oogenesis

In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
57.8K
The JAK-STAT Signaling Pathway01:20

The JAK-STAT Signaling Pathway

Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...
10.0K