Tag Archives: VEGF

Levels of angiogenic regulators and MMP-2, -9 activities in Martorell ulcer: a case report

O. M. Petrenko1, A. A. Tykhomyrov2

1Bogomolets National Medical University, Kyiv, Ukraine;
2Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine;
e-mail: artem_tykhomyrov@ukr.net

Received: 27 July 2018; Accepted: 13 December 2018

Martorell hypertensive ischemic leg ulcers (HYTILU) represent a unique form of lower extremity non-healing ulcers that develop in association with poorly controlled high blood pressure. The present study was performed in order to assess levels of protein regulators of angiogenesis (vascular endothelial growth factor, or VEGF, and angiostatins) and to evaluate activities of matrix metalloproteinases (MMPs) (gelatinases MMP-2 and -9) in wound cutaneous tissue in the case of patient with 2-years HYTILU history. VEGF and angiostatin levels were analyzed by Western blot, MMP activities were evaluated by gelatin zymography. We report here for the first time that wound tissue in HYTILU is characterized with increased levels of VEGF (by 75 folds vs. histologically normal tissue, P < 0.01) and dramatic overproduction of angiostatin levels, which are undetectable in healthy cutaneous tissue. Approximately 10-fold elevation in MMP-2 and -9 activities is observed in wound tissue as compared with uninjured cutaneous tissue. Obtained results indicate that increased production of angiogenic inhibitors, angiostatins, may counteract VEGF-induced pro-angiogenic signaling, and together with MMP overactivation, contributes to failed healing of ischemic ulcer. Further extended studies are needed to clarify how changes of angiogenic profile and imbalance of proteolytic activities in non-healing Martorell ulcers can be considered during their management procedures to improve efficacy of surgery debridement and/or skin grafting.

Effects of Pistacia atlantica resin oil on the level of VEGF, hydroxyproline, antioxidant and wound healing activity in STZ-induced diabetic rats

B. Shahouzehi1, M. Shabani2, N. Shahrokhi3, S. Sadeghiyan4, Y. Masoumi-Ardakani5*

1Cardiology Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran;
e-mail: bshahouzehi@yahoo.com;
2Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran;
3Department of Physiology, Afzalipour School of Medicine & Physiology Research Center, Kerman University of Medical Sciences, Kerman, Iran;
4Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran;
5Physiology Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran;
e-mail: ymab125@gmail.com

Diabetes mellitus is a chronic metabolic disorder which is followed by many complications. One of these problems following diabetes is diabetic ulcers and 2.5% of diabetic patients develop foot ulcer annually. Natural resources are useful stock for finding traditional treatment. Studies which examined Pistacia atlantica properties showed that it has some beneficial effects including: antimicrobial, antifungal, antioxidant and wound healing. Yet, Pistacia atlantica resin oil effects on diabetic wound have not been examined. Therefore, we evaluate Pistacia atlantica resin oil antioxidant and wound healing activity. Sprague-Dawley male rats were entered to the study and randomly grouped (n = 10) as follows: group 1 – control group – burnt rats which received neither STZ nor Pistacia atlantica resin oil; group 2 – diabetic burnt rats; group 3 – diabetic burnt rats which received 250 µl/day Pistacia atlantica resin oil topically as an ointment for two weeks. At the end of the study antioxidant status, Vascular Endothelial Growth Factor (VEGF) and hydroxyproline contents were examined in the wound area. Our results showed that Pistacia atlantica resin oil has remarkable antioxidant activity in STZ-induced diabetic rats. Also, it promoted VEGF and hydroxyproline contents in the wound area which showed that it increases angiogenesis and collagen turnover in the diabetic wound. We concluded that Pistacia atlantica resin oil can be considered as a new therapeutic agent in diabetic wound healing, and also it is safe, available and cheap treatment of other wounds and skin injuries.

The mechanism of VEGF-mediated endothelial cells survival and proliferation in conditions of unfed-culture

T. V. Nikolaienko, V. V. Nikulina, D. V. Shelest, L. V. Garmanchuk

Educational and Scientific Centre “Institute of Biology”,
Taras Shevchenko National University of Kyiv, Ukraine;
e-mail: nikolaenkotetiana@yandex.ua

The mechanisms of VEGF-mediated effects on endothelial cells during cancer development and progression is not clear. In present study the biological effects of VEGF, VEGF-rich culture medium of peritoneal macrophages from mice with Lewis lung carcinoma were studied on MAEC cell line under conditions of unfed culture. We have shown that VEGF increased cell proliferation by the 5th day of culturing vs control and anti-VEGF-treated cells. This effect was associated with increased consumption of glucose and NO production by the 2nd day while decreased – on the 5th day of cell culturing. VEGF-mediated NO production was dependent on Ca2+ ions. Block of Ca2+-channels (LaCl3) had more pronounced inhibitory effect vs chelator of Ca2+ ions (EDTA).  It was shown that peritoneal macrophages are the main suppliers of VEGF at tumor angiogenesis, as evidenced by the data obtained on model system of endothelial cells synchronized in G0/G1 phase.