The dipeptidyl peptidase IV family in cancer and cell biology

Denise M T Yu1, Tsun-Wen Yao, Sumaiya Chowdhury

  • 1AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, University of Sydney, Sydney, Australia.

The FEBS Journal
|January 16, 2010
PubMed

Insights

The dipeptidyl peptidase IV (DPIV) gene family, involved in disease and cancer, has diverse functions and therapeutic potential. Understanding their enzymatic and nonenzymatic roles is key.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Enzymology

Background:

  • Proteases play crucial roles in mammalian biology, with many implicated in pathogenic and cancer processes.
  • The dipeptidyl peptidase IV (DPIV) gene family exhibits diverse functions, localization, and substrate specificities.
  • This family includes both enzymatic and nonenzymatic members, highlighting complex biological involvement.

Purpose of the Study:

  • To provide a detailed examination of the biological roles of the DPIV gene family.
  • To explore the therapeutic potential of DPIV family members as drug targets.

Main Methods:

  • Literature review and analysis of existing research on the DPIV gene family.
  • Comparative analysis of enzyme structure, substrate recognition, and biological functions.
  • Assessment of the involvement of DPIV family members in disease and cancer.

Main Results:

  • The DPIV gene family comprises four enzymes and two nonenzymatic members with distinct characteristics.
  • These enzymes and nonenzymes engage in cell biological processes through both enzymatic and nonenzymatic mechanisms.
  • Significant differences in structure and substrate recognition exist within the family.

Conclusions:

  • The DPIV gene family represents a unique group of proteins with multifaceted biological activities.
  • Their involvement in disease pathogenesis and cancer suggests substantial potential as therapeutic targets.
  • Further research into their complex roles could lead to novel treatment strategies.

Related Concept Videos

Dipeptidyl Peptidase 4 Inhibitors01:23

Dipeptidyl Peptidase 4 Inhibitors

Dipeptidyl peptidase 4 (DPP-4) is a serine protease widely distributed in the body. It's involved in the inactivation of GLP-1 and GIP hormones, which are crucial for insulin regulation. DPP-4 inhibitors, such as sitagliptin (Januvia), saxagliptin (Onglyza), linagliptin (Tradjenta), alogliptin (Nesina), and vildagliptin (Galvus), help increase the proportion of active GLP-1, enhancing insulin secretion. These inhibitors work by competitively binding to DPP-4. This binding causes a significant...
Cancer Cell Migration through Invadopodia01:35

Cancer Cell Migration through Invadopodia

Invadosome is a broad category of cell surface structures with proteolytic activity that  degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However, invadopodia can...
Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
PI3K/mTOR/AKT Signaling Pathway01:22

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a rapamycin-insensitive companion...
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...