scholarly journals Hypotensive Snake Venom Components—A Mini-Review

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2778 ◽  
Author(s):  
Orsolya Péterfi ◽  
Francisc Boda ◽  
Zoltán Szabó ◽  
Elek Ferencz ◽  
László Bába
Keyword(s):  
Blood Pressure ◽  
Growth Factors ◽  
Snake Venom ◽  
Natriuretic Peptides ◽  
Kidney Diseases ◽  
Public Health Issue ◽  
Vascular Endothelial Growth Factors ◽  
Vascular Endothelial ◽  
Phospholipases A2 ◽  
Endothelial Growth Factors

Hypertension is considered a major public health issue due to its high prevalence and subsequent risk of cardiovascular and kidney diseases. Thus, the search for new antihypertensive compounds remains of great interest. Snake venoms provide an abundant source of lead molecules that affect the cardiovascular system, which makes them prominent from a pharmaceutical perspective. Such snake venom components include bradykinin potentiating peptides (proline-rich oligopeptides), natriuretic peptides, phospholipases A2, serine-proteases and vascular endothelial growth factors. Some heparin binding hypotensive factors, three-finger toxins and 5′ nucleotidases can also exert blood pressure lowering activity. Great advances have been made during the last decade regarding the understanding of the mechanism of action of these hypotensive proteins. Bradykinin potentiating peptides exert their action primarily by inhibiting the angiotensin-converting enzyme and increasing the effect of endogenous bradykinin. Snake venom phospholipases A2 are capable of reducing blood pressure through the production of arachidonic acid, a precursor of cyclooxygenase metabolites (prostaglandins or prostacyclin). Other snake venom proteins mimic the effects of endogenous kallikrein, natriuretic peptides or vascular endothelial growth factors. The aim of this work was to review the current state of knowledge regarding snake venom components with potential antihypertensive activity and their mechanisms of action.

scholarly journals Detection of Serum Vascular Endothelial Growth Factors (VEGF) And Soluble Vascular Endothelial Growth Factors (sVEGF / sflt-1) of Pregnancy Induced Hypertension Mothers (PIH) With pathological changes of Placenta In a Tertiary Care Hospital of West Bengal.

2018 ◽  
Vol 2 (1) ◽  
pp. 25
Author(s):  
Sulekha Ghosh ◽  
Kabayashree Jana ◽  
Pratima Mandal ◽  
Trithankar Chakrabarty ◽  
Debasis Bhattacharya ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Growth Factors ◽  
Tertiary Care ◽  
Vascular Endothelial Growth Factors ◽  
Vascular Endothelial ◽  
Care Hospital ◽  
Angiogenic Growth Factors ◽  
Serum Free ◽  
Induced Hypertension ◽  
Endothelial Growth Factors

Introduction:Pregnancy Induced Hypertension (PIH) results from imbalance between pro-angiogenic factors (VEGF & PIGF) and antiangiogenic factors (sVEGFR-1/sflt- 1)Subjects and methodology: A mixed random study comprising of random cases of different gestational ages 28-36 wks of PIH mothers along with control cases till completion of pregnancy after delivery. Age of enrolled mothers and their gestational age, blood pressure, serum free VEGF and sVEGFR-1(sflt1) were compared in both groups (control n=36, PIH n=36). Blood pressure of both control and PIH mothers just before and after delivery showed significant correlation (p<0.0001). Serum levels of free VEGF were lower among PIH mothers at 28-36 wks (p <0.0001) and just before delivery (JBD) (p <0.0001) than normal control antenatal mothers and more or less similar in both groups at just after delivery (p <0.390). Serum sflt1 level (6459.81 ±1811.07 pg/ml) of PIH mothers showed higher value than control mothers (1062.19 ± 165.98 pg/ml) at the time of presentation and also just before delivery(JBD) & after delivery(JAD) and was highly significant ( p < 0.0001). Serum free VEGF level of PIH mothers was negatively correlated with systolic r= - 0.247, p = 0.147) and diastolic (r =-0.220, p =0.197) blood pressure. The increased serum sflt1 level of PIH mothers was positively correlated with systolic (r = 0.299, p = 0.07) and diastolic (r = 0.309, p = 0.067) blood pressure. Semi quantitative expression of VEGF R1 and PCNA LI of placenta showed increased (3+) expression of VEGF R1 of 13 (43.33%) and > 50% PCNA LI expression of 12 (40%) cases than control.Discussion &Conclusion:The elevated levels of systolic and diastolic blood pressure along with alteration of proangiogenic and angiogenic growth factors among PIH mothers than normotensive control may help to identify PIH mothers as early as possible and referring them to higher/tertiary centers for better management and prevention of its grave complications of PIH.International Journal of Human and Health Sciences Vol. 02 No. 01 Jan’18. Page : 25-30

scholarly journals Production of Vascular Endothelial Growth Factors from Human Lung Macrophages Induced by Group IIA and Group X Secreted Phospholipases A2

2010 ◽  
Vol 184 (9) ◽  
pp. 5232-5241 ◽  
Author(s):  
Francescopaolo Granata ◽  
Annunziata Frattini ◽  
Stefania Loffredo ◽  
Rosaria I. Staiano ◽  
Angelica Petraroli ◽  
...  
Keyword(s):  
Growth Factors ◽  
Human Lung ◽  
Vascular Endothelial Growth Factors ◽  
Vascular Endothelial ◽  
Phospholipases A2 ◽  
Lung Macrophages ◽  
Endothelial Growth Factors

Vascular growth factors play critical roles in kidney glomeruli

2015 ◽  
Vol 129 (12) ◽  
pp. 1225-1236 ◽  
Author(s):  
Luigi Gnudi ◽  
Sara Benedetti ◽  
Adrian S. Woolf ◽  
David A Long
Keyword(s):  
Growth Factors ◽  
Growth Factor ◽  
Kidney Diseases ◽  
Glomerular Disease ◽  
Vascular Endothelial Growth Factors ◽  
Vascular Endothelial ◽  
Vascular Growth ◽  
Vascular Growth Factor ◽  
And Function ◽  
Endothelial Growth Factors

Kidney glomeruli ultrafilter blood to generate urine and they are dysfunctional in a variety of kidney diseases. There are two key vascular growth factor families implicated in glomerular biology and function, namely the vascular endothelial growth factors (VEGFs) and the angiopoietins (Angpt). We present examples showing not only how these molecules help generate and maintain healthy glomeruli but also how they drive disease when their expression is dysregulated. Finally, we review how manipulating VEGF and Angpt signalling may be used to treat glomerular disease.

Snake venom vascular endothelial growth factors (svVEGFs): unravelling their molecular structure, functions, and research potential

2021 ◽  
Author(s):  
Isabela Gobbo Ferreira ◽  
Manuela Berto Pucca ◽  
Isadora Sousa de Oliveira ◽  
Felipe Augusto Cerni ◽  
Beatriz de Cássia da Silva Jacob ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Growth Factors ◽  
Snake Venom ◽  
Structure Functions ◽  
Vascular Endothelial Growth Factors ◽  
Vascular Endothelial ◽  
Endothelial Growth Factors

scholarly journals Snake Venom Vascular Endothelial Growth Factors (VEGF-Fs) Exclusively Vary Their Structures and Functions among Species

2009 ◽  
Vol 284 (15) ◽  
pp. 9885-9891 ◽  
Author(s):  
Yasuo Yamazaki ◽  
Yukiko Matsunaga ◽  
Yuko Tokunaga ◽  
Shinya Obayashi ◽  
Mai Saito ◽  
...  
Keyword(s):  
Growth Factors ◽  
Snake Venom ◽  
Vascular Endothelial Growth Factors ◽  
Vascular Endothelial ◽  
Endothelial Growth Factors

scholarly journals Proteolytic Cleavages in the VEGF Family: Generating Diversity among Angiogenic VEGFs, Essential for the Activation of Lymphangiogenic VEGFs

Biology ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 167
Author(s):  
Jaana Künnapuu ◽  
Honey Bokharaie ◽  
Michael Jeltsch
Keyword(s):  
Growth Factors ◽  
Molecular Level ◽  
Specific Antigen ◽  
Receptor Activation ◽  
Vascular Endothelial Growth Factors ◽  
Vascular Endothelial ◽  
Turn On ◽  
C And N ◽  
Proteolytic Cleavages ◽  
Endothelial Growth Factors

Specific proteolytic cleavages turn on, modify, or turn off the activity of vascular endothelial growth factors (VEGFs). Proteolysis is most prominent among the lymph­angiogenic VEGF-C and VEGF-D, which are synthesized as precursors that need to undergo enzymatic removal of their C- and N-terminal propeptides before they can activate their receptors. At least five different proteases mediate the activating cleavage of VEGF-C: plasmin, ADAMTS3, prostate-specific antigen, cathepsin D, and thrombin. All of these proteases except for ADAMTS3 can also activate VEGF-D. Processing by different proteases results in distinct forms of the “mature” growth factors, which differ in affinity and receptor activation potential. The “default” VEGF-C-activating enzyme ADAMTS3 does not activate VEGF-D, and therefore, VEGF-C and VEGF-D do function in different contexts. VEGF-C itself is also regulated in different contexts by distinct proteases. During embryonic development, ADAMTS3 activates VEGF-C. The other activating proteases are likely important for non-developmental lymphangiogenesis during, e.g., tissue regeneration, inflammation, immune response, and pathological tumor-associated lymphangiogenesis. The better we understand these events at the molecular level, the greater our chances of developing successful therapies targeting VEGF-C and VEGF-D for diseases involving the lymphatics such as lymphedema or cancer.

scholarly journals Study of Microvessel Density and the Expression of Vascular Endothelial Growth Factors in Adrenal Gland Pheochromocytomas

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Magdalena Białas ◽  
Grzegorz Dyduch ◽  
Joanna Dudała ◽  
Monika Bereza-Buziak ◽  
Alicja Hubalewska-Dydejczyk ◽  
...  
Keyword(s):  
Growth Factors ◽  
Microvessel Density ◽  
Antiangiogenic Therapy ◽  
Prognostic Significance ◽  
Operation Technique ◽  
Vascular Endothelial Growth Factors ◽  
Vascular Endothelial ◽  
Vascular Architecture ◽  
Laparoscopic Operation ◽  
Endothelial Growth Factors

Angiogenesis (neoangiogenesis), a process of neovascularization, is an essential step for local tumor growth and distant metastasis formation. We have analysed angiogenesis status: vascular architecture, microvessel density, and vascular endothelial growth factors expression in 62 adrenal pheochromocytomas: 57 benign and 5 malignant. Immunohistochemical evaluation revealed that vascular architecture and vessel density are different in the central and subcapsular areas of the tumor. Furthermore, we have observed a strong correlation between number of macrophages and microvessel density in the central and subcapsular areas of the tumor and between the expression of VEGF-A in tumor cells and microvessel density in central and subcapsular areas of the tumor. Secondary changes in these tumors influence the results and both vascular architecture and microvessel density are markedly disturbed by hemorrhagic and cystic changes in pheochromocytomas. These changes are partially caused by laparoscopic operation technique. However, no differences in vascular parameters were found between pheochromocytomas with benign and malignant clinical behavior. Our observation showed that analysis of angiogenesis, as a single feature, does not help in differentiating malignant and benign pheochromocytomas and has no independent prognostic significance. On the other hand, high microvessel density in pheochromocytoma is a promising factor for antiangiogenic therapy in malignant cases.

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