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Molecular Biology of Liquid Biopsy in Cancer

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Pathology, Diagnostics, and Therapeutics".

Deadline for manuscript submissions: 10 September 2024 | Viewed by 706

Special Issue Editor


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Guest Editor
Department of Radiological, Oncological and Pathological Sciences, Sapienza-University of Rome, 00161 Rome, Italy
Interests: precision medicine; liquid biopsy; CTC; ctDNA; breast cancer; personalized treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Liquid biopsy has evolved into a comprehensive tool, moving beyond the mere enumeration of circulating tumor cells (CTCs) to delving into their phenotypic intricacies.  This shift has given rise to novel biomarker strategies, spotlighting the prognostic significance of diverse CTC phenotypes.  Classification based on traits like nuclear size, content, and cytokeratin intensities has become a pivotal focus.  Beyond traditional CTCs, EpCAM+/CK+ objects and fusion hybrids of neoplastic cells with leukocytes offer added prognostic insights.  The enumeration and characterization of micro-sized tumor fragments and tumor-derived extracellular vesicles (tdEVs) serve as prognostic indicators in metastatic cancers.  Exploring CTCs with attenuated CK expression and clusters reveals clinical relevance, associated with shorter progression-free survival (PFS) and worse OS.  The observed CK expression variability underscores the importance of investigating the role of epithelial–mesenchymal transition in therapy resistance and metastasis.  Moving forward, crucial attention is needed to characterize phenotypic heterogeneity at the single CTC level, providing insights into malignant progression and resistance biomarker identification.

Moreover, liquid biopsy emerges as a promising, non-invasive alternative for real-time tumor evolution assessment.  Overcoming the limitations of spatial heterogeneity, clonal dynamics, and therapeutic pressure on biomarker analysis, liquid biopsy offers timely and repeatable tumor information.  Various compounds, including nucleic acids, CTCs, extracellular vesicles, soluble factors, and tumor-educated platelets, present clinical utility in early diagnosis, minimal residual disease detection, prognosis, and treatment response.  Extracellular vesicles play roles in angiogenesis, immune suppression, tumor microenvironment modulation, metastasis, and treatment resistance.  Innovations in avoiding extracellular vesicle effects hold potential for advancing cancer treatments.

We welcome submissions to this Special Issue that explore a wide range of topics related to molecular research into liquid biopsy in cancer, including, but not limited to, the following:

  • Identification of molecular biomarkers for early diagnosis, risk classification, and prognosis;
  • Utility of liquid biopsy in detecting minimal residual disease and predicting treatment response;
  • Elucidation of molecular mechanisms influenced by extracellular vesicles and the development of targeted therapeutic strategies;
  • Investigation of tumor-related circulating cells and their implications in cancer progression;
  • Application of artificial intelligence for the analysis of liquid biopsy data;
  • Exploration of clonal hematopoiesis and its impact on liquid biopsy results;
  • Standardization of methodologies associated with liquid biopsy procedures;
  • Development of innovative techniques for analyzing tumor components in liquid biopsy samples.

Dr. Valentina Magri
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • liquid biopsy
  • Exosomes
  • Non-coding RNA
  • cancer
  • molecular biology
  • early diagnosis
  • minimal residual disease
  • treatment response prediction
  • extracellular vesicles
  • targeted therapeutic strategies
  • circulating tumor cells
  • clonal hematopoiesis

Published Papers (1 paper)

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Research

10 pages, 1297 KiB  
Article
Circulating Cancer-Associated Macrophage-like Cells as a Blood-Based Biomarker of Response to Immune Checkpoint Inhibitors
by Valentina Magri, Gianluigi De Renzi, Luca Marino, Michela De Meo, Marco Siringo, Alain Gelibter, Roberta Gareri, Chiara Cataldi, Giuseppe Giannini, Daniele Santini, Chiara Nicolazzo and Paola Gazzaniga
Int. J. Mol. Sci. 2024, 25(7), 3752; https://doi.org/10.3390/ijms25073752 - 28 Mar 2024
Viewed by 587
Abstract
Evidence has been provided that circulating cancer-associated macrophage-like cell (CAM-L) numbers increase in response to chemotherapy, with an inverse trend compared to circulating tumor cells (CTCs). In the era of evolving cancer immunotherapy, whether CAM-Ls might have a potential role as predictive biomarkers [...] Read more.
Evidence has been provided that circulating cancer-associated macrophage-like cell (CAM-L) numbers increase in response to chemotherapy, with an inverse trend compared to circulating tumor cells (CTCs). In the era of evolving cancer immunotherapy, whether CAM-Ls might have a potential role as predictive biomarkers of response has been unexplored. We evaluated whether a serial blood evaluation of CTC to CAM-L ratio might predict response to immune checkpoint inhibitors in a cohort of non-small-cell lung cancer patients. At baseline, CTCs, CAM-Ls, and the CTC/CAM-L ratio significantly correlate with both progression-free survival (PFS) and overall survival (OS). The baseline CTC/CAM-L ratio was significantly different in early progressors (4.28 ± 3.21) compared to long responders (0.42 ± 0.47) (p = 0.001). In patients treated with immune checkpoint inhibitors, a CTC/CAM-L ratio ≤ 0.25 at baseline is associated with better PFS and OS. A baseline CTC/CAM-L ratio ≤ 0.25 is statistically significant to discriminate early progressions from durable response. The results of the present pilot study suggest that CAM-Ls together with CTCs could play an important role in evaluating patients treated with cancer immunotherapy. Full article
(This article belongs to the Special Issue Molecular Biology of Liquid Biopsy in Cancer)
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