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HomeMedicalBRAF, MEK inhibitors ‘saving lives’ as histiocytic dysfunction remedy

BRAF, MEK inhibitors ‘saving lives’ as histiocytic dysfunction remedy

March 17, 2023

2 min learn


Kumar A. BRAF to the longer term: Focused therapies for histiocytic problems. Introduced at: The Society for Pediatric Dermatology Assembly; March 16, 2023; New Orleans.

Kumar reviews being a advisor and/or speaker for SOBI, SpringWorks Therapeutics and OPNA.

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Key takeaways:

  • Most sufferers handled with BRAF and MEK inhibitors for histiocytic problems confirmed no lively illness.
  • Langerhans cell histiocytosis is a uncommon dysfunction affecting 1 in 200,000 youngsters.

NEW ORLEANS — BRAF and MEK inhibitors could present promise as a remedy possibility for youngsters and adults with histiocytic problems, in response to a presenter right here.

Langerhans cell histiocytosis (LCH), categorized below histiocytic neoplasms, is a uncommon pediatric illness affected one in each 200,000 youngsters, Ashish Kumar, MD, PhD, of Cincinnati Kids’s Hospital Medical Heart, mentioned throughout his presentation at The Society for Pediatric Dermatology Assembly, which preceded the American Academy of Dermatology Annual Assembly. Manifestations of the illness embrace asymptomatic bone lesions and multi-organ illness.

Baby in Swing
 BRAF and MEK inhibitors could present promise as a remedy possibility for youngsters and adults with histiocytic problems. Picture: Adobe Inventory.

At the moment, the usual remedy for LCH is chemotherapy; nonetheless, failure charges have a tendency to succeed in roughly 45%.

Ashish Kumar

“Now we have new remedies which might be simpler than the usual of remedy,” Kumar informed Healio. “These new remedies aren’t simply simpler — they’re saving lives and saving the sufferers from struggling.”

LCH is most pushed by activated mutations within the mitogen-activated protein (MAP)-kinase pathway and has been proven to reply nicely to BRAF and MEK inhibitors, together with dabrafenib and trametinib.

Based on the presentation, researchers collected information in utilizing off-label dabrafenib and trametinib as first-line remedy in 34 sufferers with histiocytic problems, primarily LCH. A complete of 12 sufferers had been handled with dabrafenib, 20 sufferers with trametinib and two sufferers with each.

Of the 16 relapsed sufferers, seven confirmed no lively illness, 5 confirmed no lively illness however had residual organ injury, and three confirmed enchancment in indicators and signs. One affected person with the uncommon multisystem histiocytosis Rosai-Dorfman illness did present illness development whereas on remedy, which Kumar attributed to the affected person not having any identifiable mutations within the MAP-kinase pathway.

Of the 18 newly recognized sufferers, all sufferers confirmed no lively illness after remedy, though 5 had residual diabetes insipidus.

These outcomes could present remedy choices which might be “simpler than chemotherapy” for sufferers affected by histiocytic problems.

An official scientific trial could also be underway evaluating mirdametinib, a novel MEK inhibitor, as a promising new remedy on this indication. Pending approval, the single-center trial will embrace youngsters aged as younger as 2 years and adults with lively illness.

“We hope to launch the trial in June,” Kumar mentioned. “As soon as the trial is open, we hope to hunt funding to open in different facilities as nicely.”



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