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Genomic Imprinting and Inheritance02:30

Genomic Imprinting and Inheritance

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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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Behavioral imprinting is observed in some newborn animals and occurs when they develop strong and specific attachments to another animal (usually a parent) following brief, early-life exposures. Offspring imprint onto parents within a brief period after birth or hatching; this time window is called the critical period. Once imprinting occurs, the bond established between the parents and their offspring is usually long-lasting.
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Immunodeficiency Diseases

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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
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Immunoprecipitation01:20

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Immunoprecipitation, or IP, is a widely used technique that employs protein-antibody interactions to isolate proteins or protein complexes in their native state for studying protein-protein interactions, quaternary structures, or supramolecular complexes. Various modifications of the technique, including chromatin IP, cross-linking IP, and fluorescence IP, are commonly used.
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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
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Immune Imprinting and Implications for COVID-19.

Zhiqian Zhou1, Julia Barrett1, Xuan He2,3

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Vaccines
|April 28, 2023
PubMed
Summary

Immune imprinting, a downside of immunological memory, may hinder responses to new SARS-CoV-2 variants and vaccines. This review explores its impact on B cell immunity and discusses potential harm from COVID-19 infection and vaccination.

Keywords:
B cellsCOVID-19SARS-CoV-2humoral immunityimmune imprintingvaccines

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Area of Science:

  • Immunology
  • Virology
  • Vaccinology

Background:

  • Immunological memory is crucial for protection against pathogens.
  • Heterologous exposure to SARS-CoV-2 antigens shapes distinct immunological memory.
  • Immune imprinting, a potential downside of memory, may impair responses to variants and new vaccines.

Purpose of the Study:

  • To review the mechanistic basis of immune imprinting.
  • To focus on B cell immunobiology in the context of immune imprinting.
  • To discuss the detrimental effects of immune imprinting on SARS-CoV-2 infection and vaccination.

Main Methods:

  • Literature review of immunological memory and B cell responses.
  • Analysis of immune imprinting mechanisms.
  • Discussion of implications for SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) infection and vaccination strategies.

Main Results:

  • Immune imprinting can limit the generation of de novo immune responses.
  • B cell immunobiology plays a key role in the mechanisms of immune imprinting.
  • The extent to which immune imprinting is harmful requires further investigation.

Conclusions:

  • Immune imprinting presents a challenge for effective immunity against evolving SARS-CoV-2.
  • Understanding B cell responses is critical for mitigating the negative effects of immune imprinting.
  • Further research is needed to optimize vaccination strategies in the context of immune imprinting.