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Related Concept Videos

Development of Immunocompetence01:22

Development of Immunocompetence

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
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Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
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Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
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Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
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Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each...
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Related Experiment Video

Updated: Nov 28, 2025

Isolation of Leukocytes from the Murine Tissues at the Maternal-Fetal Interface
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A Role for Maternal Factors in Suppressing Cytoplasmic Incompatibility.

Ajm Zehadee Momtaz1,2, Abraham D Ahumada Sabagh1,2, Julian G Gonzalez Amortegui1,2

  • 1Department of Biological Sciences, Florida International University, Miami, FL, United States.

Frontiers in Microbiology
|November 26, 2020
PubMed
Summary
This summary is machine-generated.

Wolbachia bacteria manipulate insect reproduction via cytoplasmic incompatibility (CI). This study found chemicals that restore egg hatching in CI-affected Drosophila, suggesting host DNA integrity is key to overcoming Wolbachia

Keywords:
CIDrosophilaWolbachiacytoplasmic incompatibilityrescue

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Area of Science:

  • Microbiology and Genetics
  • Insect Endosymbionts
  • Reproductive Biology

Background:

  • Wolbachia are endosymbiotic bacteria in insects, manipulating host reproduction.
  • Cytoplasmic Incompatibility (CI) is a key Wolbachia-driven reproductive manipulation causing embryonic lethality.
  • Rescue of CI by infected females is known, but host contributions are unclear.

Purpose of the Study:

  • To investigate host (Drosophila simulans) contributions to rescuing CI.
  • To identify chemical treatments that can suppress CI.

Main Methods:

  • Chemical feeding approach in Drosophila simulans.
  • Testing seven chemical treatments affecting DNA integrity, cell cycle, and protein turnover.
  • Assessing egg hatch rates in response to treatments and Wolbachia infection.

Main Results:

  • Uninfected females showed higher CI egg hatch rates with seven chemical treatments.
  • Three treatments significantly suppressed CI in both endogenous wRi and ectopic wMel Wolbachia infections.
  • DNA integrity appears crucial for CI suppression across different Wolbachia strains.

Conclusions:

  • Host factors, particularly those related to DNA integrity, can suppress Wolbachia-induced CI.
  • Chemical interventions offer a novel framework for studying and potentially manipulating CI.
  • This research deepens understanding of insect-endosymbiont reproductive interactions.