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Under the Hood: Understanding the Features of Mucin in Pseudomyxoma Peritonei

Pedro Villarejo-Campos1,2, Mariano García-Arranz2,3, Siyuan Qian1

  • 1Department of Surgery, Fundación Jiménez Díaz University Hospital, Avda. Reyes Católicos, 2, 28040 Madrid, Spain.

Journal of Clinical Medicine
|June 28, 2023
PubMed

Insights

Pseudomyxoma peritonei (PMP) is characterized by mucin production. This study found MUC-2 mucin and Pseudomonas bacteria, including a novel species, are common in PMP, impacting diagnosis and treatment.

Area of Science:

  • Oncology
  • Microbiology
  • Gastroenterology

Background:

  • Pseudomyxoma peritonei (PMP) is a rare malignancy defined by mucin production.
  • PMP has a high risk of peritoneal relapse.
  • Understanding mucin composition and associated microbiome is crucial for PMP management.

Purpose of the Study:

  • To investigate the immunohistochemical and biological characteristics of mucin in cellular and acellular PMP.
  • To analyze the bacterial composition of the PMP microbiome.
  • To identify potential diagnostic and therapeutic targets for PMP.

Main Methods:

  • Prospective analysis of mucin specimens from PMP patients.
  • Immunohistochemical characterization of mucin composition (MUC-2, MUC-5AC, MUC-1).
  • Metagenomic analysis to determine bacterial microbiome composition.

Main Results:

  • Secreted mucins MUC-2 and MUC-5AC, and membrane-associated MUC-1 were identified in both cellular and acellular PMP.
  • The PMP microbiome was dominated by Proteobacteria, particularly the genus Pseudomonas.
  • Pseudomonas plecoglossicida, a previously unreported species in the human microbiome, was the most abundant organism.

Conclusions:

  • MUC-2 presence and Pseudomonas colonization are characteristic features of both cellular and acellular PMP.
  • The findings highlight a potential link between specific mucins and bacterial species in PMP.
  • These insights may inform future diagnostic strategies and therapeutic interventions for PMP.
Keywords:
MUC-2microbiomemucinpseudomonaspseudomyxoma peritonei

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