Periostin

Source: Wikipedia, the free encyclopedia.
POSTN
Identifiers
Gene ontology
Molecular function
Cellular component
Biological process
Sources:Amigo / QuickGO
Ensembl
UniProt
RefSeq (mRNA)
RefSeq (protein)
Location (UCSC)Chr 13: 37.56 – 37.6 MbChr 3: 54.27 – 54.3 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Periostin (POSTN, PN, or osteoblast-specific factor OSF-2) is a protein that in humans is encoded by the POSTN gene.[5][6] Periostin functions as a ligand for alpha-V/beta-3 and alpha-V/beta-5 integrins to support adhesion and migration of epithelial cells.[7]

Periostin is a gla domain vitamin K dependent factor.[8]

Function

Periostin is a secreted extracellular matrix protein that was originally identified in cells from the mesenchymal lineage (

epithelial-mesenchymal transition in cancer and with the differentiation of mesenchyme in the developing heart.[9]
This protein shares a homology with fasciclin I, a secreted cell adhesion molecule found in insects.

In many cancers, periostin binds to integrins on cancer cells, activating the Akt/PKB- and FAK-mediated signaling pathways. This leads to increased cell survival, invasion, angiogenesis, metastasis, and the epithelial-mesenchymal transition.[10]

In humans and mice, periostin undergoes alternative splicing in its C-terminal region, resulting in specific

isoforms that can be observed in a broad range of cancers such as pancreatic, colon, and breast cancer.[9]

While periostin plays a wide variety of roles in tissue development along with disease, its function in tissue remodeling as a response to injury is a common underlying role in these different mechanisms. Periostin is transiently upregulated during cell fate changes, whether they are related to alterations in physiology or to pathological changes. It influences extracellular matrix restructuring, tissue remodeling, and the epithelial-mesenchymal transition, all of which can be related to tissue healing, development, and disease. Thus, it functions as a mediator, balancing appropriate and inappropriate responses to tissue damage.[11]

Clinical significance

In valvular heart disease

Periostin plays a critical role in the development of

myofibroblasts in angiogenic areas in atherosclerotic and rheumatic valvular heart disease in humans. Periostin has also been shown to increase the secretion of matrix metalloproteinase from valvular intestinal cells, endothelial cells, and macrophages. It is thought that periostin plays a role in cardiac valve complex degeneration by inducing both angiogenesis and matrix metalloproteinase production.[12]

In tissue regeneration and healing

As a matricellular protein, periostin is also important for tissue regeneration. In healthy human skin, periostin is expressed at basal levels and is expressed in the epidermis and hair follicles along with

keratinocytes.[13] Periostin localizes to the extracellular compartment of cells during tissue remodeling associated with wound repair. It may also promote injury closure by facilitating the activation, differentiation, and contraction of fibroblasts. However, the increase in periostin expression associated with tissue regeneration post-injury is transient, starting a few days post-injury, peaking after seven days post-injury, and decreasing afterwards.[11]

In asthma

Periostin is associated with asthma, a fact that is exploited by the experimental asthma medication lebrikizumab.[14]

In cancer

Periostin over-expression was reported in several types of cancer, most frequently in the environment of tumor cells.[7][15] Recent evidence shows that periostin is a component of the extracellular matrix expressed by fibroblasts in normal tissues and stroma of primary tumor. The metastatic colony formation requires the induction of periostin in the foreign stroma by the infiltrating cancer cells. Periostin production is upregulated in lung fibroblasts by either TGF-β2 or TGF-β3, the latter being secreted by infiltrating cancer stem cells (in MMTV-PyMT mouse breast cancer model) [16]

Periostin has been shown to be highly upregulated in

chemoattractant, promoting both migration and invasion of macrophages and monocytes into glioblastomas in a dose-dependent manner.[18] Clinically, periostin-associated gene signatures, which are predominated by secreted and matrix proteins, correspond to patient prognosis and malignancy. Given its features related to glioblastoma progression, periostin is a marker of glioma malignancy as well as recurrence of tumors, making it a possible target for therapy that continues to be studied and explored.[17]

Table: Periostin expression in various cancer cell lines.[19]

Cell line Origin POSTN/ACTB1
U2OS Osteosarcoma 3.5±1.7
LB96 Ewing sarcoma 0
LB23-1 Rhabdomyosarcoma 0.1±0.1
HeLa Cervical cancer 3.0±0.4
PA-1 Ovarian teratocarcinoma 1.4±0.1
LB37-1 NSCLC
LB85 SCLC 3.4±0.2
LB92 SCLC 0.6±0.2
LB1047 Renal cell carcinoma 0.8±0.2
BB64 Renal cell carcinoma 0.08±0.01
LB108 Colorectal cancer 0
MCF7
Breast Cancer 0
Hs578T
Breast Cancer 3693±86
Panc-1 Pancreatic carcinoma 0
Capan-1 Pancreatic carcinoma 0
Huh-7
Hepatocarcinoma
0.3±0.07
LB831 Bladder carcinoma 1748±74
MZGC3 Stomach cancer 0
A172 Glioblastoma 45±4
MZ2 Melanoma 2.3±0.7
LB39 Melanoma 0.5±0.03
LB2586-7 Melanoma 3.4±0.3
LB2201-3 Melanoma 4.2±0.4
A375 Melanoma 4.7±1.2

1 (cDNA POSTN/cDNA ACTB) × 104

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000133110Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000027750Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. PMID 8363580
    .
  6. ^ "Entrez Gene: POSTN periostin, osteoblast specific factor".
  7. ^
    PMID 12235007
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Further reading