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Related Concept Videos

Antimicrobial Proteins01:23

Antimicrobial Proteins

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Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
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Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
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Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

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In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
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Intracellular Movement of Viruses and Bacteria01:10

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Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
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Metal-Ligand Bonds02:51

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

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In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
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Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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Using a Bacterial Pathogen to Probe for Cellular and Organismic-level Host Responses
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Using a Bacterial Pathogen to Probe for Cellular and Organismic-level Host Responses

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Role of Divalent Cations in Infections in Host-Pathogen Interaction.

John A D'Elia1, Larry A Weinrauch1

  • 1Kidney and Hypertension Section, E P Joslin Research Laboratory, Joslin Diabetes Center, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.

International Journal of Molecular Sciences
|September 28, 2024
PubMed
Summary
This summary is machine-generated.

Divalent cations like calcium and magnesium influence pathogen virulence and host defense. Understanding these electrolyte interactions is crucial for managing infections in immune-compromised individuals, especially with tuberculosis.

Keywords:
antimicrobial defenseapoptosisautophagycalcium ion channelsdivalent cationsmicrobial defensepathogen-host interactiontuberculosis

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Area of Science:

  • Infectious Diseases
  • Immunology
  • Biochemistry

Background:

  • Increasing prevalence of diabetes, renal disease, and immune deficiencies necessitates understanding host-pathogen electrolyte interactions.
  • Divalent cation levels significantly impact host susceptibility and pathogen survival in immune-compromised individuals.
  • Calcium-to-magnesium ratio is linked to insulin resistance and increased tuberculosis risk.

Purpose of the Study:

  • To review the mechanisms of pathogen virulence and host defense related to divalent cation transport.
  • To highlight the role of Natural Resistance-Associated Macrophage Protein (NRAMP) in host-pathogen interactions.
  • To explore how pathogens like Mycobacterium tuberculosis manipulate cation channels.

Main Methods:

  • Literature review of studies on electrolyte interactions, immune deficiencies, and pathogen virulence.
  • Analysis of the role of divalent cations (calcium, magnesium) in host defense mechanisms like apoptosis and autophagy.
  • Examination of the function of mammalian and pathogen NRAMP in cation transport.

Main Results:

  • Host cellular calcium levels relative to magnesium impact insulin resistance and tuberculosis risk.
  • Divalent cation movement is critical for host defense, inducing pathogen apoptosis or autophagy.
  • Pathogen NRAMP competes with host NRAMP for divalent cations, influencing pathogen survival within macrophages.

Conclusions:

  • Divalent cation homeostasis is a key battleground between host defense and pathogen virulence.
  • NRAMP plays a critical role in mediating host-pathogen interactions involving metal ion transport.
  • Further research into cation channel dynamics is essential for developing novel therapeutic strategies against infectious diseases.