Case Report
The Progress of TSP-1 in the Research of Various Kinds of Related Tumors
Xue-qin ZHOU2, Sen YANG1,2*, Li-juan GUO1, Xiu-fa TANG3 and Xiao-yi WANG3
1Suining Central Hospital, China
2Zunyi Medical University, China
3West China College of Stomatology, Sichuan University, China
*Corresponding author: Yang Sen, Zunyi Medical University, Zunyi 563003, China
Published: 03 Jan, 2017
Cite this article as: Xue-qin ZHOU, Sen YANG, Li-juan
GUO, Xiu-fa TANG, Xiao-yi WANG.
The Progress of TSP-1 in the Research
of Various Kinds of Related Tumors. J
Dent Oral Biol. 2017; 2(1): 1021.
Abstract
Thrombospondin 1 (TSP-1) as a kind of inhibiting angiogenesis important substances, widely
distributed in human tissues, but also makes it occupy the irreplaceable position in the formation
of different tissues of tumor, growth, differentiation, metastasis, currently available in the literature
about TSP-1 in various types of cancer (such as prostate cancer, bladder cancer, non-small cell lung
cancer, breast cancer, cervical cancer, pancreatic cancer, etc.) the occurrence and development of
the role of the reported It is often seen. It undoubtedly provides new directions and guidelines
for medical science research workers in the field of cancer and its relationship with tumor would
has irreplaceable role for prognosis and exploration the clinical tumor’s etiology, diagnosis and
treatment. This review is a summary of the discovery and development of TSP-1 in various types of
tumor research.
Keywords: Thrombospondin 1 (TSP-1); CD47; Solid tumors; Blood system malignant tumor
Introduction
TSP-1 is a multifunctional glycoprotein, be synthesized and secreted by platelets, epithelial cells, mesothelial cells, mesangial cells, fibroblasts etc. It could active the transforming growth factor beta, inhibiting angiogenesis and anti tumor activity, participates in tissue repair biological effects [1,2]. TSP-1 can regulate tumor cell growth, adhesion, migration and other biological behavior [3]. The thrombin sensitive protein, as the most powerful tumor angiogenesis negative regulator, regulates angiogenesis of solid tumor, which has important effects on the generation, development, treatment and prognosis of solid tumors [4,5]. Cancer treatment or through the regulation of the immune system to achieve the purpose to improve the anti-tumor effect, the human immune system or by the secretion of silver or direct regulation of tumor angiogenesis so as to achieve the purpose of tumor cure and control [6]. The application of immune histochemical study found that some of the human tumor cell lines (such as squamous cell carcinoma, melanoma, breast cancer, etc. also have a synthesis of TSP-1). Recently in the treatment of cancer immunotherapy drugs have provided significant progress, in some cases, with superior efficacy. MN McCracken and other experiments [7] have found that CD47 as an important "do not eat me" signal expressed in the malignant cells. CD47 blockade [8]: SIRP-α axis tumor cells and immune cells (monocytes, macrophages, and dendritic cells) increased tumor cell phagocytosis in solid tumors (including, but not limited to, bladder, breast, colon, lung and pancreas) [9] and blood system malignant tumor. These innate phagocytic cells are also specialized antigen presenting cells (APC), which provides a link to the innate adaptive tumor immunity. Preliminary study showed that the APC antigen was engulfed by tumor cells, which activated T cells. Thus, drug blocking CD47: SIRP - alpha employs attractive therapeutic targets as monotherapy or in combination with other immune modulators to activate T cells in vivo. In vitro and in tumor bearing mice model were found in closed CD47 or after the up-regulated expression of TSP-1, SIRP - alpha through signaling pathway increasing the degree of infiltration of macrophages around tumor cells and its effect on tumor cells so that the tumor area decreased. TSP- 1 at physiological concentrations can be through the C and endothelial cells on the CD47 molecule binding, inhibit the NO signal transduction pathway to regulate blood vessel formation process, blood flow, as well as the role of blood platelets [10-12]. Tumor associated angiogenesis is assumed to be regulated by a balance between pro angiogenic factors and anti angiogenic factors. RS Watnick is a key step in the establishment of the angiogenesis ability of human tumor cells, which is a key factor to inhibit the secretion of anti angiogenic factors, platelet reactive protein -1 (TSP-1). This inhibition is expressed by the mammary epithelial cell and renal cell engineering SV40 early interval gene protein, hTERT and H-RasV12, which are essential for tumor formation. In the process of epithelial cell transformation, a signaling pathway leads to a reduction in PI3 kinase induced order activation from Ras to TSP-1, Rho and ROCK, which activates Myc by phosphorylation, thus enabling myc to inhibit TSP-1 transcription. However, in the change of fibroblasts, TSP-1 inhibition can be achieved through another mechanism involving p53 and pRb inactivation. We describe a novel mechanism by which the activation of epithelial cancer genes and the inactivation of tumor suppressor genes, in turn, enable tumor formation through the activation of fibroblasts in the fibroblasts [13].
Materials and Methods
In bladder cancer it was found that the expression of TSP-1 was
closely related to the stage and stage of bladder cancer [14], in the
higher stage and high degree of malignancy were weak expression
of TSP-1 expression, the higher positive rate of specimens in normal
tissue or tumor early. Wang Xiaohui, Li Zhijun to detect human
bladder transitional cell carcinoma (TBCC) for the relationship
between the expression of CD105 and TSP-1 and the clinical
pathological features of TBCC, the expression level for 60 cases of
bladder carcinoma and 12 cases of normal bladder mucosa tissue
was used to determine the CD105 and TSP-1 by S-P and micro
vessel density (MVD), and the analysis of transitional cell carcinoma
staging and grading of the expression and its significance in bladder.
The positive expression rate of CD105 in 60 cases of transitional
cell carcinoma of bladder was 78.3%, and the positive expression
rate of TSP-1 was 43.3%.The expression of CD105 and micro vessel
density (MVD) in bladder transitional carcinoma was significantly
higher than that in normal bladder tissues (P < 0.01). There was
no significant difference in the expression of TSP-1 in the early
transitional cell carcinoma of bladder (P > 0.05), and the expression
was lower than that in the normal bladder tissue (P < 0.05). It was
found that the expression of CD105 and TSP-1 in TBCC was an
important factor to regulate tumor angiogenesis, which was closely
related to the growth and metastasis of tumor. Yap and other research
confirmed that TSP-1 derivatives can directly kill endothelial cells in
vitro, in vivo can induce the apoptosis of endothelial cells induced
by cyclophosphamide and cisplatin, thereby inhibiting the formation
of tumor angiogenesis [15]. A number of studies have found that
the combination of TSP-1 and vascular endothelial receptor CD36
inhibits the migration of endothelial cells and the formation of
capillary vessels. Isenberg and other studies have found that the
type sequence of TSP-1 can significantly inhibit the proliferation of
endothelial cells [16]. Reiher et al. [17] also found that TSP analogues
of DI-TSP have similar inhibition of tumor angiogenesis and TSP-1
induced endothelial cell apoptosis. The expression of -1 (TSP-1) plays
an important role in bladder cancer. To investigate the distribution
of TSP-1 696 C / T polymorphism (rs2664139) relationship between
clinical features of bladder cancer and the genotype was determined
in 609 cases and 670 cases of control group by fluorescence method
in Chinese crowd. Jinbao Gu and other multiple regression analysis
were used to analyze the relationship between polymorphisms and
bladder cancer risk, and the results showed that the TSP-1 - 696 C / T
polymorphism may have an influence on the susceptibility of bladder
cancer in Chinese population [18].
In the absence of TSP-1 breast cancer in animal tumor burden
and vascular system significantly increased [19], within the tumor
capillary expansion; high expression of TSP-1 mice showed delayed
tumor growth or lack of tumor progression. The expression level of
TSP-1 in breast cancer was negatively correlated with the density of
blood vessels in the breast cancer tissue. In the same cancer tissue [20],
the TSP-1 expression level was higher than that of the local vascular
density. The recurrence and metastasis of breast cancer depend on
the angiogenesis of tumor tissue. Wang Wensheng [21] to explore
the role of TSP-1 and VEGF in breast carcinoma invasion, metastasis,
recurrence and prognosis, by using immunohistochemical S-P
method in 180 patients with breast cancer, according to the Neufeld
scoring method, using χ2 test and Person correlation analysis, using
SPSS17.0 statistical analysis software package. TSP-1 (+) cases of the
recurrence rate is TSP-1 (-) were low, said TSP-1 may to some extent
limit the recurrence and metastasis of breast cancer. Prolactinoma
is the most common type of human pituitary tumors, the dopamine
receptor agonist in the treatment of common reaction is good, but
for the dopamine antagonist drugs patients need to adopt alternative
therapies, TSP-1 high expression of prolactinoma. Its growth is
relatively slow, less metastasis, and angiogenesis is reduced, so TSP-
1 may provide a new target for cancer the treatment. Recouvreux
MV and other studies suggest that TSP-1 may act as a potential
replacement therapy or supplement for dopamine receptor agonists
[22].
At present, the clinical diagnosis of prostate cancer mainly rely
on rectal examination, serum PSA, rectal ultrasound and pelvic MRI
examination, diagnosis is required by the prostate biopsy. Based on
a large number of studies, the problem of excessive diagnosis and
treatment of PSA in the pre - screening of adenocarcinoma was
found. In 2007 Shafer to solve this problem, taking into account the
forefront of prostate cancer patients with TSP-1 had higher frequency
in 22 kinds of disease related protein in 80% [23-25], the TSP-1 as
a new diagnosis of prostate cancer and benign prostatic hyperplasia
index, through certain methods and experiments the sensitivity and
specificity of TSP-1 were better than that of up to 79% and 81%,
Bastian [26], in prostate cancer TSP-1 synthesis in partial or total
loss can provide some favorable conditions for the growth of tumors.
After Wang Jianye, Zhang Yao guang and so on through the self -
designed enzyme linked immune sorbent assay (ELISA) to diagnose
the sensitivity and specificity of routine PSA comparison, the results of
TSP-1 ROC area is 0.9663 (SE=0.0299), PSA ROC (SE=0.0909) area of
0.7421, the difference was statistically significant (P < 0.05) the value
of TSP-1, smaller differences between individuals, PSA fluctuations,
prostate cancer TSP-1 value [(73.77 + 12.72)] and detected in benign
prostatic hyperplasia (121.86 + 19.47)%] patients were compared,
the difference was statistically significant (t=8.44, P < 0.01), so TSP-1
PSA can more accurately distinguish benign and malignant prostate
disease. Immuno histochemical expression of TSP-1 two step method
of benign prostatic hyperplasia group was significantly higher than
that in prostate cancer group (P < 0.05). The expression of TSP-1 was
significantly higher in the low score group and non bone metastasis
group than in the high score group and the bone metastasis group (P
< 0.05). TSP-1 is an important index to judge the malignant degree
and prognosis of prostate cancer [27,28]. TSP-1 and PEDF two
molecules in prostate cancer cells were reduced, and its development
is associated with increased angiogenesis, thrombospondin (TSP -
1) and pigment epithelium derived factor (PEDF), anti angiogenic
molecules can effectively reduce the expression of prostate cancer
cells. TSP-1 exerts its activity by binding to cell surface receptors
such as CD36, which can inhibit the growth of prostate cancer by
inhibiting the formation of tumor blood vessels [29].
CD47 blockade may inhibit thrombin sensitive protein -1 signal or
prevent the inhibition of SIRP tumor associated macrophage growth
signal [30] control liver tumor research [on the apoptosis of human
hepatoma cell line HCCLM3 in vitro induced effects and mechanisms
of [31], cell apoptosis by flow cytometry TSP-1 and its receptor CD36,
CD47 induced HCCLM3 rate the application of electron microscopy
analysis, morphological changes after the reverse transcriptase
polymerase chain reaction (RT-PCR) expression in HCCLM3 cells
after caspase-3mRNA analysis, found that the apoptosis rate of TSP-
1 Group [(12.44 + 0.72)%] was significantly higher than the control
group [(4.31 + 0.29)%] and CD47 blocking group [(4.99 + 0.12)%],
P < 0.01. CD36 blocking group [(9.99 + 0.57)%] higher than the
control group or CD47 blocking group, lower than the TSP-1 group
(P < 0.01). Electron microscope observation of the control group and
CD47 blocking group cells growth, TSP-1 group and CD36 blocking
group apoptosis rate increased, the cells showed a variety of apoptosis.
The expression of caspase-3mRNA in group TSP-1 (0.652 + 0.024)
and CD36 blocking group (0.615 + 0.020) was significantly higher
than that in control group (0.398 + 0.033) and CD47 blocking group
(0.432 + 0.019), P < 0.01. TSP-1 can induce the apoptosis of human
hepatoma cell line TSP-1, HCCLM3 and receptor CD47 binding up
regulation of Caspase-3 expression may be one of the pathways, and
the invasion and metastasis of hepatocellular carcinoma [32].
Low expression of TSP-1 in non small cell lung cancer is an
indicator of poor prognosis [33,34] plays a very important role
in the invasion and metastasis. Wang Chunling [35] through the
examination of 45 cases of non-small cell lung cancer (NSCLC) ET-1
and 18 cases of normal lung tissues, the expression of TSP-1 and
microvessel density (MVD) count, found ET-1 positive expression
rate of NSCLC in (42.22%) was significantly higher than the control
group, the expression of NSCLC and ET-1 histological there is a close
relationship between the grade and lymph node metastasis, ET-1
MVD positive group was significantly higher than ET-1 negative
group. The positive expression rate of TSP-1 in NSCLC (37.78%)
was lower than that of control group, and the expression of TSP-1
was related to lymph node metastasis. The MVD of TSP-1 positive
group was lower than that of TSP-1 negative group. The expression
of MVD was positively correlated with the expression of TSP-1, and
negatively correlated with the expression of ET-1. Which shows that
in NSCLC ET-1 as an angiogenic factor, TSP-1 acts as an inhibitor
of angiogenesis factor and angiogenesis of lung cancer, both have a
synergistic effect, decreasing the expression of TSP-1 NSCLC in the
invasion and metastasis play an important role in increasing. The joint
detection is helpful to judge the metastasis and invasion of NSCLC.
The objective basis is provided to judge the degree of differentiation
and treatment outcome of NSCLCN. Puri N and other studies have
found that the synergistic action of T-oligo and TSP-1 in non-small
cell lung cancer can reduce tumor size and inhibit angiogenesis [36].
About Osteopontin (OPN) and thrombospondin -1 (TSP-1) effect on
prognosis in patients with non-small cell lung cancer, M and Rouanne
were analyzed retrospectively in 171 cases of non-small cell lung
cancer patients from 2012 January to December after radical surgery,
preoperative serum, demographic, clinical and pathological data were
analyzed analysis and molecular. Determination of serum OPN and
TSP-1 before treatment by ELISA. The expression was detected by
immuno histochemistry in primary tumor tissue protein, the results
showed that before treatment the serum OPN and TSP-1 levels can
reflect tumor aggressiveness and prognosis of primary non-small cell
lung cancer patients can be used as markers of surgical resection [37].
Results
The development may be reduced to inhibit angiogenesis and
expression of TSP-1 protein in uterine leiomyoma, promote apoptosis
and expression of IGF- II expression to promote tumor angiogenesis,
promote cell proliferation related. The expression of TSP-1 in uterine
leiomyoma was lower than that in normal uterine muscular layer [38].
According to the experimental study of H Laklai revealed TSP-
1 on pancreatic cancer angiogenesis and pancreatic cancer cells
are inhibited, the somatostatin receptor subtype 2 (SST2) and the
expression of TSP-1 in pancreatic cancer is up-regulated anti tumor
effect of early pancreatic cancer negative feedback inhibition [39].
Linhai and other researchers found that the expression of TSP-1
in pancreatic cancer was significantly higher than that of normal
pancreas and chronic pancreatitis tissues (P < 0.05). Different tumor
stages and different tumor size, lymph node metastasis, perineural
invasion of pancreatic cancer patients without TSP-1 expression had
significant difference (P < 0.05); Logistic regression analysis show
that the expression of TSP-1 and tumor stage, perineural invasion is
closely related to the Kaplan-Meier method and Log-rank test analysis
showed that the expression of TSP-1 and lymph node metastasis,
neural invasion, tumor stage and patient survival rate; multivariate
COX risk model analysis showed that the neural invasion, lymph
node metastasis and tumor prognosis is directly related to TSP-1
expression is not directly related. It comes out that TSP-1 can be used
to judge whether the transfer of the pancreatic cancer index to judge
the prognosis of pancreatic cancer has a certain clinical value. The
resistance of oxaliplatin therapy of gastric cancer is the main reason
for its failure, which found that the drug resistance gene in oxaliplatin
by the alcohol resistance gene 1 (Txr1), the research of taxol show that
in oxaliplatin resistant cell SGC7901 / L transfer mainly expressed
the site of TXR1 from the nucleus to the cytoplasm, the expression
of TXR1 mRNA and protein were higher than the parental cells and
the expression of thrombospondin 1 (TSP1) decreased. When the
TXR1 gene silencing, increase the expression of TSP1 and oxaliplatin
on human gastric cancer cells significantly reduced oxaliplatin.TSP-
1 may exert a positive effect on the treatment of gastric cancer by
inhibiting the production of drug resistance of gastric cancer cells by
the coordination of TXR1 with [40].
G Bocci et al. [41] in the evaluation of the mechanism of the
anti angiogenic activity of ceramide analogues, it is found that in the
process of TSP-1 and other related factors, the effects of anti tumor
and anti angiogenesis are increased. Local blood perfusion and
angiogenesis of malignant glioma is an important factor in its growth,
must guarantee perfusion rate to allow their growth, while TSP-1 can
significantly inhibit the angiogenesis and reduce local perfusion, so
as to achieve the purpose of slow or even inhibit the growth of [42].
H Naganuma and other studies show that the expression of TSP-
1 protein is regulated by the normal cell density of glioblastoma
cells, rather than by the density of the tumor cells [43]. MVD is an
independent index of malignant hematological disease. TSP-1 is a
negative regulator of angiogenesis, which can help to evaluate the
severity and efficacy more accurately and guide the clinical treatment.
TSP-1 can also on multiple myeloma treatment and prognosis to
predict and evaluate the effect of [44,45] glioma is the most common
central nervous system primary tumor angiogenesis with vascular rich
features, to study the molecular mechanism of potential angiogenesis,
to help identify therapeutic targets the potential has an important
role in the study of Jing, Zhang and TGF- show that the TSP-1 beta
gamma PPAR- expression in glioma and tumor microvessel density
was negatively correlated, suggesting that inhibition of formation of
these proteins may be involved in glioma angiogenesis [46].
Cutaneous melanoma expressed pleiotropic factor
thrombospondin-1 (TSP-1). A study suggests that TSP-1 can change
the morphology and function of blood vessels, thus the growth and
metastasis of melanoma plays a certain role in [47], but the study of
Borsotti P showed that the TSP-1 (RNA and protein), in four cultured
melanoma cells and RGP melanoma were not detected in, from 13 a
cell line at present advanced melanoma or metastasis in. In addition,
55 people in the disease gene chip analysis showed that the expression
of primary melanoma and metastases TSP-1 than common dysplastic
nevi, and melanoma cells TSP-1 production movement in vitro and in
vivo on lung colonization potential. VEGF, VEGFR-1 and FGF-2, to
participate in the development of melanoma, regulate the production
of TSP-1. The co-expression of these factors was negatively correlated
with TSP-1 and SNAI2 (SNAI2), the main gene of cell migration was
closely related to the metastasis of melanoma. The results showed
that TSP-1 and FGF-2, VEGF and VEGFR-1 together, as part of
an independent movement plan to determine the invasion and
metastasis of melanoma [48]. A Jeanne found that thrombospondin
-1 (TSP-1) is an extracellular matrix glycoprotein is known for its
high expression in the tumor microenvironment, it can promote
a positive phenotype in particular by interaction with cell surface
receptors of the CD47 effect. In many malignant tumors, its origin
in the stroma, melanoma is an exception, invasion and metastatic
melanoma cells over expression TSP-1. The recent study shows that
a molecule of new drugs selectively prevents CD47 from binding to
TSP-1, called TAX2, when administered systemically, by reducing the
B16 melanoma subcutaneously transplanted tumor tissue to exhibit
anti-cancer properties. At the same time, new evidence is presented
to support the contribution of TSP-1 in the treatment of melanoma
metastasis and resistance. Based on the analysis of multiple genomic
and proteomic databases based on a comprehensive system biology
approach, the first identified a tsp-1-centered interactive network
for high expression in metastatic melanoma. Then, the effects of
disrupting TSP-1 were investigated: the interaction of CD47 in
human malignant melanoma A375 transplantation. In this model,
the system management of TAX2 induces tumor necrosis by reducing
tumor necrosis, and makes the tumor less invasive. In addition, TAX2
treatment also significantly inhibited B16F10 murine melanoma cells
and metastasis in homologous experimental model of lung metastasis
was analyzed histopathologically and longitudinal and quantitative
transfer process proved by follow-up CT. In conclusion, through the
combination of bioinformatics and preclinical studies, the results
suggest that the targeting of TSP-1/ CD47 axis may represent a
valuable therapeutic option for the treatment of melanoma [49].
Summary and Perspective
On the current study of TSP-1, the vast majority have recognized its regulatory and inhibition of the biological role of blood vessels. But the specific role of TSP-1 in tumor are some controversy and argument, as most of the current literature has said it has a negative regulatory role in growth inhibition of angiogenesis and tumor cells in the various tumors, but its action principle and mechanism remains to be seen, to sum up, it is not difficult to see on TSP-1 the research will undoubtedly give the development and prognosis of the tumor to bring new inspiration and guidance, and some scholars for exploring the [50]. TSP-1 may serve as a potential tumor suppressor gene, which may lead to a new starting point for the study of cancer.
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