Vascular Growth Factors and Atherogenesis in Diabetes Mellitus

Author(s):  
T. Koschinsky ◽  
F. A. Gries
2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Silvija Cvitic ◽  
Gernot Desoye ◽  
Ursula Hiden

The placental vasculature rapidly expands during the course of pregnancy in order to sustain the growing needs of the fetus. Angiogenesis and vascular growth are stimulated and regulated by a variety of growth factors expressed in the placenta or present in the fetal circulation. Like in tumors, hypoxia is a major regulator of angiogenesis because of its ability to stimulate expression of various proangiogenic factors. Chronic fetal hypoxia is often found in pregnancies complicated by maternal diabetes as a result of fetal hyperglycaemia and hyperinsulinemia. Both are associated with altered levels of hormones, growth factors, and proinflammatory cytokines, which may act in a proangiogenic manner and, hence, affect placental angiogenesis and vascular development. Indeed, the placenta in diabetes is characterized by hypervascularisation, demonstrating high placental plasticity in response to diabetic metabolic derangements. This review describes the major regulators of placental angiogenesis and how the diabetic environmentin uteroalters their expression. In the light of hypervascularized diabetic placenta, the focus was placed on proangiogenic factors.


2019 ◽  
Vol 12 (2) ◽  
pp. 69-79
Author(s):  
Tajudeen Yahaya ◽  
Mutiu Sifau

Inadequate breastfeeding or its total neglect has been mentioned in several studies as a contributing factor to the globally rising incidence of Type 2 diabetes mellitus (T2DM). However, the anti-diabetic role of breast-milk has not been given much attention. As such, this study was initiated to review and bring to update on the role of breastfeeding in the risk reduction of T2DM. Relevant information on the topic was retrieved from the reliable science databases, including PubMed, MedLine, Google Scholar, Researchgate, etc. The results showed that breast-milk is not energy dense and contains several health-enhancing bioactive molecules, including adipokines, antimicrobial and growth factors, cytokines, nutrients, and immune cells. Adipokines interact with the central nervous system to modulate certain physiological processes involved in energy balance, thereby programming an infant to be at a reduced risk for overweight, obesity and T2DM later in life. The antimicrobial and growth factors, as well as immune cells and bioactive nutrients may stimulate the growth of beneficial bacteria and/or inhibit the growth of pathogens. Thus, strengthen neonate defense mechanisms to effectively prevent infections as well as short and long-term disorders such as obesity and T2DM. In conclusion, nursing mothers are advised to breastfeed babies adequately before introducing them to complementary foods. To cater to the need of babies who may not have access to breastfeeding, healthcare providers should formulate infant formula using breast-milk components as basic constituents.


2009 ◽  
Vol 27 (15_suppl) ◽  
pp. e22124-e22124
Author(s):  
M. S. Block ◽  
S. N. Markovic

e22124 Background: Therapeutic anti-cancer vaccine strategies have been effective in a broad range of preclinical tumor models, but clinical trials of vaccines in metastatic cancer patients have failed to show clinical benefit. We have previously shown that patients with stage IV melanoma have systemic immunosuppression including elevated plasma levels of immunosuppressive cytokines and impaired DTH responses to recall antigens. Patients with stage IV melanoma also have elevated circulating levels of the vascular growth factors vascular endothelial growth factor A (VEGF A) and placental growth factor (PlGF). Based on these observations, we have hypothesized that vascular growth factors such as VEGF and PlGF mediate systemic immunosuppression. Methods: FVB mice with established ANV6 transplantable breast tumors were bled, and plasma samples were assayed for VEGF, PlGF, and interleukin (IL)-10. Splenocytes taken from tumor-bearing mice were stimulated via the T cell receptor (TCR), and interferon gamma (IFN) production was measured. Splenocytes from normal mice were stimulated in the presence or absence of VEGF; IFN production was measured. Results: Compared with age- and sex-matched controls, tumor-bearing mice had elevated plasma levels of VEGF, PlGF, and the immunosuppressive cytokine IL-10 (see table ). Furthermore, splenocytes from tumor-bearing mice produced less IFN upon TCR stimulation than did splenocytes from control mice. Finally, normal mouse splenocytes produced less IFN when stimulated in the presence of VEGF than in its absence (70.2 ± 37.2 vs. 260.0 ± 130.9 pg/ml). Conclusions: We have shown that mice with advanced tumors exhibit both elevated levels of vascular growth factors and systemic immune inhibition. We have also shown that VEGF leads to impairment of immune function in normal splenocytes. Taken together, these results suggest that excess vascular growth factors may mediate immunosuppression in animals with advanced tumors, which may in turn impair anti-tumor vaccine efficacy. [Table: see text] No significant financial relationships to disclose.


2014 ◽  
Vol 8 (4) ◽  
pp. 151
Author(s):  
K. Yeboah ◽  
D. Antwi ◽  
B. Gyan ◽  
V. Govoni ◽  
J.K. Cruickshank ◽  
...  

1997 ◽  
Vol 193 (7) ◽  
pp. 503-510 ◽  
Author(s):  
Knut Dietzmannl ◽  
Peter von Bossanyi ◽  
Michaela Warich-Kirches ◽  
Elmar Kirches ◽  
Hans-Joachim Synowitz ◽  
...  

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