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Related Concept Videos

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...
Oogenesis01:22

Oogenesis

Oogenesis,  the process of developing egg cells (female gametes), occurs within the ovaries and is fundamental to female fertility. This sequence begins during fetal development when diploid oogonia in the developing ovaries undergo mitotic divisions to produce primary oocytes. By birth, these primary oocytes enter prophase I of meiosis but become arrested in this stage, remaining suspended until puberty.
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...
Ovarian Cycle01:27

Ovarian Cycle

The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle length...
Nondisjunction01:21

Nondisjunction

Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers.  Nondisjunction is common during anaphase I or anaphase II of meiosis.  Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold sister...
Cancers Originate from Somatic Mutations in a Single Cell02:21

Cancers Originate from Somatic Mutations in a Single Cell

Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
Cancers Originate from Somatic Mutations in a Single Cell02:21

Cancers Originate from Somatic Mutations in a Single Cell

Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...

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Related Experiment Video

Updated: May 12, 2026

Transplantation Into the Mouse Ovarian Fat Pad
09:25

Transplantation Into the Mouse Ovarian Fat Pad

Published on: September 7, 2016

Evolution, ovulation and cancer.

K Vijayraghavan1, Satyajit Rath

  • 1, a senior editor at eLife , is at the Tata Institute of Fundamental Research , National Centre for Biological Sciences , Bangalore , India vijay@ncbs.res.in.

Elife
|April 20, 2013
PubMed
Summary
This summary is machine-generated.

Experiments on fruit flies reveal conserved pathways in epithelial cell secretions that regulate ovulation. This research offers potential insights into the human reproductive system and ovarian cancer mechanisms.

Keywords:
D. melanogasterNotch signalingcancerexocrine glandsnuclear receptorovulationsperm storage

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Ex Vivo Culture of Primary Human Fallopian Tube Epithelial Cells
11:46

Ex Vivo Culture of Primary Human Fallopian Tube Epithelial Cells

Published on: May 9, 2011

Area of Science:

  • Reproductive biology
  • Cellular biology
  • Comparative genomics

Background:

  • Epithelial cells in the fallopian tube secrete factors crucial for reproductive processes.
  • Ovulation is a complex event regulated by intricate molecular pathways.
  • Conserved biological pathways exist across diverse species, including insects and mammals.

Purpose of the Study:

  • To investigate the role of fallopian tube epithelial cell secretions in regulating ovulation.
  • To explore the potential of using model organisms like fruit flies to study human reproductive functions.
  • To identify conserved molecular mechanisms underlying ovulation and their relevance to ovarian cancer.

Main Methods:

  • Comparative analysis of gene expression in fallopian tube epithelial cells and fruit fly models.
  • Functional assays to assess the impact of specific secreted factors on ovulation-like processes in flies.
  • Bioinformatic analysis to identify conserved signaling pathways.

Main Results:

  • Identified key secreted factors from epithelial cells that influence ovulation.
  • Demonstrated conserved regulatory pathways between fruit flies and mammals affecting reproductive timing.
  • Established a link between these conserved pathways and potential mechanisms in ovarian cancer development.

Conclusions:

  • Fallopian tube epithelial cell secretions play a conserved role in ovulation regulation.
  • Fruit fly models are valuable for dissecting fundamental mechanisms of the human reproductive system.
  • Understanding these conserved pathways may offer new avenues for ovarian cancer research.