Mechanisms of Melanoma Metastasis

A special issue of Cells (ISSN 2073-4409). This special issue belongs to the section "Cellular Pathology".

Deadline for manuscript submissions: closed (15 May 2021) | Viewed by 13638

Special Issue Editor


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Guest Editor
Yale Cancer Center, New Haven, CT, USA
Interests: skin color; skin cancer; melanoma metastasis; solid tumor metastasis

Special Issue Information

According to estimates from the International Agency for Research on Cancer, by the year 2030 there will be 22 million new cancer cases and 13 million deaths per year. The main cause of cancer mortality is not the primary tumor itself but metastasis to distant organs and tissues yet the mechanisms of this process remain poorly understood. Melanoma is a tumor that is highly prone to metastasize. This proposal has since been confirmed in many animal models and from our group more recently in three patients with malignant melanoma and two with renal cell carcinoma. Leucocyte–tumor cell fusion provides a unifying explanation for metastasis. While primary tumors arise in a wide variety of tissues representing not a single disease but many different diseases, metastatic cancer may be only one disease arising from a common, non-mutational event: fusion of primary tumor cells with leukocytes. From the findings to date it would appear that such hybrid formation is a major pathway for metastasis. Studies on the mechanisms involved could uncover new targets for therapeutic intervention. Cells is planning to devote an entire Special Issue to Mechanisms of Melanoma Metastasis.

Dr. John M. Pawelek
Guest Editor

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Keywords

  • skin color
  • skin cancer
  • melanoma metastasis
  • solid tumor metastasis

Published Papers (2 papers)

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Review

16 pages, 1168 KiB  
Review
Cell–Cell Fusion and the Roads to Novel Properties of Tumor Hybrid Cells
by Mareike Sieler, Julian Weiler and Thomas Dittmar
Cells 2021, 10(6), 1465; https://doi.org/10.3390/cells10061465 - 11 Jun 2021
Cited by 19 | Viewed by 4292
Abstract
The phenomenon of cancer cell–cell fusion is commonly associated with the origin of more malignant tumor cells exhibiting novel properties, such as increased drug resistance or an enhanced metastatic capacity. However, the whole process of cell–cell fusion is still not well understood and [...] Read more.
The phenomenon of cancer cell–cell fusion is commonly associated with the origin of more malignant tumor cells exhibiting novel properties, such as increased drug resistance or an enhanced metastatic capacity. However, the whole process of cell–cell fusion is still not well understood and seems to be rather inefficient since only a certain number of (cancer) cells are capable of fusing and only a rather small population of fused tumor hybrids will survive at all. The low survivability of tumor hybrids is attributed to post-fusion processes, which are characterized by the random segregation of mixed parental chromosomes, the induction of aneuploidy and further random chromosomal aberrations and genetic/epigenetic alterations in daughter cells. As post-fusion processes also run in a unique manner in surviving tumor hybrids, the occurrence of novel properties could thus also be a random event, whereby it might be speculated that the tumor microenvironment and its spatial habitats could direct evolving tumor hybrids towards a specific phenotype. Full article
(This article belongs to the Special Issue Mechanisms of Melanoma Metastasis)
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29 pages, 1703 KiB  
Review
Chimeric Antigen Receptor (CAR) T Cell Therapy for Metastatic Melanoma: Challenges and Road Ahead
by Tahereh Soltantoyeh, Behnia Akbari, Amirali Karimi, Ghanbar Mahmoodi Chalbatani, Navid Ghahri-Saremi, Jamshid Hadjati, Michael R. Hamblin and Hamid Reza Mirzaei
Cells 2021, 10(6), 1450; https://doi.org/10.3390/cells10061450 - 9 Jun 2021
Cited by 33 | Viewed by 8719
Abstract
Metastatic melanoma is the most aggressive and difficult to treat type of skin cancer, with a survival rate of less than 10%. Metastatic melanoma has conventionally been considered very difficult to treat; however, recent progress in understanding the cellular and molecular mechanisms involved [...] Read more.
Metastatic melanoma is the most aggressive and difficult to treat type of skin cancer, with a survival rate of less than 10%. Metastatic melanoma has conventionally been considered very difficult to treat; however, recent progress in understanding the cellular and molecular mechanisms involved in the tumorigenesis, metastasis and immune escape have led to the introduction of new therapies. These include targeted molecular therapy and novel immune-based approaches such as immune checkpoint blockade (ICB), tumor-infiltrating lymphocytes (TILs), and genetically engineered T-lymphocytes such as chimeric antigen receptor (CAR) T cells. Among these, CAR T cell therapy has recently made promising strides towards the treatment of advanced hematological and solid cancers. Although CAR T cell therapy might offer new hope for melanoma patients, it is not without its shortcomings, which include off-target toxicity, and the emergence of resistance to therapy (e.g., due to antigen loss), leading to eventual relapse. The present review will not only describe the basic steps of melanoma metastasis, but also discuss how CAR T cells could treat metastatic melanoma. We will outline specific strategies including combination approaches that could be used to overcome some limitations of CAR T cell therapy for metastatic melanoma. Full article
(This article belongs to the Special Issue Mechanisms of Melanoma Metastasis)
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