Antifungal agents in hematopoietic stem cell transplantation

G Iyer Parameswaran1, Brahm H Segal, Nikolaos G Almyroudis

  • 1Division of Infectious Diseases, Roswell Park Cancer Institute, Elm & Carlton Streets, Buffalo, NY 14263, USA.

Insights

Stem cell transplant recipients face high risks of fungal infections, especially mold diseases. New antifungal drugs and strategies like posaconazole prophylaxis show promise in preventing and treating these serious complications.

Area of Science:

  • Hematology
  • Infectious Diseases
  • Oncology

Background:

  • Invasive fungal infections (IFIs) are a significant cause of morbidity and mortality in stem cell transplant (SCT) recipients.
  • Allogeneic SCT recipients have a higher risk of IFIs compared to autologous SCT recipients.
  • While fluconazole prophylaxis reduced invasive candidiasis, mold infections remain a major threat during immunosuppression for graft-versus-host disease.

Purpose of the Study:

  • To review current strategies for preventing and treating invasive fungal infections in SCT recipients.
  • To highlight advancements in antifungal prophylaxis and therapy.
  • To discuss emerging approaches for managing IFIs in immunocompromised patients.

Main Methods:

  • Review of recent clinical trials and guidelines on antifungal prophylaxis and treatment in SCT.
  • Analysis of the efficacy of posaconazole prophylaxis in high-risk patients.
  • Evaluation of new antifungal agents and combination therapies.

Main Results:

  • Posaconazole prophylaxis is effective in preventing IFIs and reducing mortality in high-risk SCT patients.
  • Preemptive strategies using biomarkers and CT scans show promise but require clinical validation.
  • New antifungal agents offer improved safety and broader spectrum activity, with voriconazole as standard for invasive aspergillosis.

Conclusions:

  • Fungal infection management in SCT requires tailored prophylaxis and treatment strategies.
  • Advances in antifungal agents and combination therapies are crucial for improving outcomes.
  • Continued research is needed to validate new diagnostic and therapeutic approaches for IFIs in SCT.

Related Concept Videos

Antifungal Agents01:15

Antifungal Agents

Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to cholesterol contributes to...
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

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...
Cryptococcal Meningitis01:27

Cryptococcal Meningitis

Cryptococcal meningitis is a life-threatening opportunistic infection predominantly associated with HIV/AIDS, accounting for over 100,000 deaths annually worldwide. However, it also affects individuals with other forms of immunosuppression, including those undergoing immunosuppressive therapy, organ transplant recipients, patients with innate immunodeficiencies, and individuals with hematological disorders. The infection is caused mainly by Cryptococcus neoformans and Cryptococcus gattii,...
Stem Cell Therapy for Tissue Regeneration01:21

Stem Cell Therapy for Tissue Regeneration

Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
Types of Stem Cells used in Stem Cell Therapy
The two main cell types that...
Bone Marrow Sampling and Transplants01:22

Bone Marrow Sampling and Transplants

Bone marrow transplant is a potential cure for several diseases, including cancer and specific genetic disorders. Notably, this procedure is applicable for patients suffering from aplastic anemia, certain types of leukemia, severe combined immunodeficiency disease (SCID), Hodgkin's disease, non-Hodgkin's lymphoma, multiple myeloma, thalassemia, sickle-cell disease, and certain cancers.
The transplant begins with high doses of chemotherapy and radiation treatment, which aim to destroy the...
Antiprotozoal Agents01:21

Antiprotozoal Agents

Leishmaniasis is a widespread parasitic disease caused by several Leishmania species. It affects millions of people each year and remains a major public health problem in endemic regions. First-line treatment relies on pentavalent antimonials, including meglumine antimoniate and sodium stibogluconate. Even so, how these drugs work has not been fully clear, especially their interaction with parasite-specific biochemical pathways. One key target is trypanothione reductase (TR), an enzyme that...