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Immunodeficiency Diseases01:25

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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Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
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Sexually Transmitted Infections01:26

Sexually Transmitted Infections

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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
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Pulmonary Tuberculosis I

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Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
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Tumor Immunotherapy

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Vaccinations01:51

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Pediatric immunotherapy and HIV control.

Tehillah T Chinunga1, Ann Chahroudi2,3, Susan P Ribeiro4,5,6

  • 1Program in Immunology and Molecular Pathogenesis, Graduate Division of Biological and Biomedical Sciences, Laney Graduate School, Emory University.

Current Opinion in HIV and AIDS
|June 6, 2024
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Summary
This summary is machine-generated.

Understanding early HIV infection in children is key to developing immunotherapies. Harnessing the infant immune system offers potential for long-term control and improved quality of life.

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Area of Science:

  • Pediatric immunology
  • HIV pathogenesis
  • Immunotherapy development

Background:

  • Infant immune systems exhibit tolerance and lack HIV-specific T cell responses, contributing to disease progression.
  • The thymus plays a crucial role in HIV pathogenesis in children living with HIV (CLWH).
  • Immune system components dictate viral control and immunotherapy response.

Purpose of the Study:

  • To explore immunotherapy potential by understanding HIV control dynamics in pediatric HIV infection.
  • To review transmission, pathogenesis, infant immunity, macaque models, and immunotherapies for pediatric HIV.
  • To highlight opportunities for immunotherapy in pediatric HIV management.

Main Methods:

  • Review of Simian immunodeficiency virus (SIV) and Simian-human immunodeficiency virus (SHIV) infected rhesus macaque models.
  • Analysis of clinical trial data in children living with HIV (CLWH).
  • Examination of early HIV infection events and immune system dynamics.

Main Results:

  • Early perinatal HIV infection is characterized by immune tolerance and limited T cell responses.
  • Broadly neutralizing antibodies (bNAbs) and T cell vaccines show promise for virologic control and ART-free remission.
  • HIV-specific bNAbs enhance humoral immunity, while T cell vaccines improve T cell responses like CD8+ T cell cytotoxicity.

Conclusions:

  • Understanding early HIV infection in CLWH informs strategies for immune system harnessing.
  • The pediatric immune system presents unique opportunities for developing long-term immunotherapies.
  • Immunotherapies can potentially improve long-term quality of life for adolescents and adults with HIV.