Targeted Therapies for Slow-Flow Vascular Malformations

Grace X Li1,2, Deshan F Sebaratnam1,2, James P Pham1,2

  • 1Faculty of Medicine and Health, University of New South Wales, Kensington, New South Wales, Australia.

Insights

Targeted therapies, initially developed for cancer, show promise for treating vascular malformations. This review focuses on therapies targeting the PI3K/AKT/mTOR pathway, driven by genetic variants.

Area of Science:

  • Genetics and Molecular Biology
  • Oncology
  • Vascular Biology

Background:

  • Genetic sequencing identifies somatic variants in vascular malformation pathogenesis.
  • These variants are also implicated in cancer development.
  • Targeted therapies from oncology are being explored for vascular malformations.

Purpose of the Study:

  • To review current evidence on targeted therapies for slow-flow vascular malformations.
  • To focus on therapies targeting the PI3K/AKT/mTOR pathway.
  • To examine the role of gain-of-function variants in treatment strategies.

Main Methods:

  • Literature review of genetic sequencing and targeted therapy studies.
  • Analysis of evidence for PI3K/AKT/mTOR pathway inhibitors.
  • Focus on slow-flow vascular malformations.

Main Results:

  • Growing evidence supports targeted therapies for vascular malformations.
  • Gain-of-function variants in PI3K/AKT/mTOR pathway are key targets.
  • Oncology-derived therapies demonstrate efficacy in preclinical and clinical settings.

Conclusions:

  • Targeted therapies, particularly those inhibiting the PI3K/AKT/mTOR pathway, offer a promising treatment avenue for vascular malformations.
  • Understanding the genetic basis of these malformations is crucial for personalized treatment.
  • Repurposing cancer therapies holds significant potential for improving patient outcomes.

Related Concept Videos

Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
7.4K
Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.5K
Antihypertensive Drugs: Vasodilators01:23

Antihypertensive Drugs: Vasodilators

Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
451
Mechanism of Angiogenesis01:10

Mechanism of Angiogenesis

Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
5.2K