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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.
Subsequent T...
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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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B Cell Activation and Differentiation01:24

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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Cells of the Adaptive Immune Response01:23

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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
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Isolation of Leukocytes from the Murine Tissues at the Maternal-Fetal Interface
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[Immune cell functionality during pregnancy].

Éva Pállinger1, Bence Nagy1, Anna Király2

  • 11 Semmelweis Egyetem, Általános Orvostudományi Kar, Genetikai, Sejt- és Immunbiológiai Intézet 1089 Budapest, Nagyvárad tér 4. Magyarország.

Orvosi Hetilap
|December 24, 2023
PubMed
Summary

Successful pregnancy relies on immune system adaptation. The maternal immune system navigates distinct inflammatory and anti-inflammatory stages, crucial for fetal development and protection against infections.

Keywords:
alloantigenalloantigénimmune toleranceimmuntoleranciapregnancyterhességtrophoblast

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Area of Science:

  • Reproductive Immunology
  • Maternal-Fetal Medicine

Background:

  • Successful pregnancy requires immune tolerance of the fetus.
  • Decidualization creates an embryo-competent tissue environment, with the decidua acting as an endocrine and immunological organ.
  • Bidirectional communication between embryonic and maternal tissues is vital for fertilization.

Purpose of the Study:

  • To characterize the dynamic immunological changes at the fetomaternal interface during pregnancy.
  • To understand the maternal immune system's adaptation for successful pregnancy.
  • To explore the link between immune dysregulation and pregnancy complications.

Main Methods:

  • Review of immunological stages during pregnancy, termed the 'immune clock'.
  • Analysis of the interplay between maternal immunity, trophoblasts, hormones, and the microbiome.
  • Examination of the immune system's flexibility in balancing tolerance, placental development, and infection defense.

Main Results:

  • Pregnancy progresses through three immunological phases: implantation (inflammatory), fetal growth (anti-inflammatory), and labor (inflammatory).
  • Successful adaptation involves maternal immune tolerance to paternal antigens, optimal placental development, and protection against pathogens.
  • A specialized immune milieu at the fetomaternal interface, integrating innate and adaptive immunity, is essential.

Conclusions:

  • Understanding the maternal immune system's role is key to diagnosing and treating pregnancy complications like infertility and implantation failure.
  • Immune dysregulation during pregnancy can lead to adverse outcomes.
  • The fetal-maternal interface requires a finely tuned immune response for a healthy pregnancy.