A Split Scalp Study of Single versus Double Spin Platelet-rich plasma Injections in Treatment of Female Pattern Hair Loss: Clinical Effect and Relation to Vascular Endothelial Growth Factor in PRP

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
Samar A Salem ◽  
Rania M Elhusseiny ◽  
Haitham M Saleh
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Hair Loss ◽  
Platelet Rich Plasma ◽  
Intradermal Injection ◽  
Vascular Endothelial ◽  
Single Spin ◽  
Double Spin ◽  
Female Pattern Hair Loss ◽  
The Right ◽  
Endothelial Growth Factor

Abstract Background Female pattern hair loss (FPHL) is the most common hair loss disorder in women. Platelet-rich plasma (PRP) provides an option for patients recalcitrant to the currently approved therapies. As there are many methods for the preparation of PRP, the most suitable for AGA therapy is not yet clear. Aims To compare the efficacy between single and double spin PRP injections in treatment of FPHL and to assess the relationship between the concentrations of vascular endothelial growth factor (VEGF) in the PRP preparation and the treatment results obtained. Patients and Methods 15 female patients with FPHL were enrolled. Each patient was subjected to intradermal injection of PRP (prepared by double-spin method) into the right half of the scalp, in addition to intradermal injection of PRP (prepared by singlespin method) into the left half of the scalp in the form of three treatment sessions three weeks apart. Evaluation of treatment response was done through comparing patients' global photographs, assessment of patients' satisfaction and folliscopic assessment before and after treatment. Results Our results showed clinically significant improvement by comparing patients' photographs in most of the treated patients. In addition, folliscopy revealed significant change of the terminal hair density in the right half of the scalp following treatment sessions.VEGF concentration didn't differ significantly between double-spin and single-spin prepared PRP, also it didn't differ significantly upon calcium activation. Conclusions PRP is an effective treatment modality for FPHL. Double-spin prepared PRP could yield better results in the treatment of FPHL than the single-spin method. However, adding Calcium gluconate prior to PRP injection is of no benefit as it didn't significantly increase the release of VEGF. Yet, further studies discussing different PRP preparation protocols and involving a larger number of cases are needed to minimize statistical errors and to detect the most accurate PRP preparation method with the greatest yield of growth factors.

Treatment of Coates retinitis in both eyes in a 5-year-old girl

2021 ◽  
pp. 63-65
Author(s):  
A.O. Nazarenko ◽  
◽  
E.E. Sidorenko ◽  
I.V. Suhanova ◽  
A.R. Shavaleeva ◽  
...  
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Growth Factor ◽  
Retinal Detachment ◽  
Clinical Case ◽  
Vascular Endothelial ◽  
Vegf Inhibitor ◽  
Vascular Activity ◽  
Factor Inhibitor ◽  
The Right ◽  
Endothelial Growth Factor

Purpose. To present a rare clinical case of bilateral Coates retinitis in a 5-year-old girl. Material and methods. A clinical case of a 5-year-old girl with rare Coat's retinitis in both eyes is described. The disease occurred abruptly: the child's parents noted the appearance of leukocoria in the right eye. After the examination Coates ' retinitis was diagnosed. At the time of examination in the clinic, there was a retinal detachment in the right eye, the surgical treatment was performed: lensvitrshvartectomy, plastic surgery of the anterior chamber, with the melting of the retina with perfluoroorganic compounds, drainage of subretinalfluid, endolaser coagulation on the right eye. A month after the first symptoms appeared in the right eye, the patient complained of decreased vision in the left eye. Examination on the pediatric retinal camera showed an increase in vascular activity in the left eye, and signs of Coats' retinitis were revealed. Results. As a therapy for this disease, the patient was twice injected intravitreally inhibitor of vascular endothelial growth factor (VEGF inhibitor) into the left eye with positive dynamics noted as a decrease in the activity of retinal vessels and leveling of the exudative component, as well as with an increase in visual acuity in the left eye. Conclusion. This clinical case demonstrates that intravitreal administration of inhibitor VEGF with traditional methods of treatment can be used as a treatment for patients with Coates retinitis. Key words: Coat's retinitis, Coats' disease, vascular endothelial growth factor inhibitor, aflibercept, intravitreal injection, anti-VEGF, retinal detachment.

In vitro release of vascular endothelial growth factor during platelet aggregation

1998 ◽  
Vol 275 (3) ◽  
pp. H1054-H1061 ◽  
Author(s):  
James P. Maloney ◽  
Christopher C. Silliman ◽  
Daniel R. Ambruso ◽  
Jun Wang ◽  
Rubin M. Tuder ◽  
...  
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Platelet Aggregation ◽  
Growth Factor ◽  
Platelet Rich Plasma ◽  
In Vitro Release ◽  
Endothelial Permeability ◽  
Vascular Endothelial ◽  
Vessel Injury ◽  
Endothelial Growth Factor

Platelet aggregation is a cardinal feature of both vascular repair and vascular disease. During aggregation platelets release a variety of vasoactive substances; some of these promote angiogenesis, endothelial permeability, and endothelial growth, actions shared by vascular endothelial growth factor (VEGF). This study was undertaken to investigate the hypothesis that VEGF is released by aggregating platelets. We found that VEGF was secreted during the in vitro aggregation of platelet-rich plasma induced by thrombin, collagen, epinephrine, and ADP (range 23–518 pg VEGF/ml). Furthermore, serum VEGF levels were elevated compared with plasma (230 ± 63 vs. 38 ± 8 pg VEGF/ml), indicative of VEGF release during whole blood coagulation. Lysates of apheresed, leukocyte-poor platelet units contained significant amounts of VEGF (2.4 ± 0.8 pg VEGF/mg protein). VEGF message and protein were also present in a megakaryocytic cell line (Dami cell). These results suggest constitutive roles for platelet VEGF in the repair of intimal vessel injury and in the altered permeability and intimal proliferation seen at sites of platelet aggregation and thrombosis.

scholarly journals Assessment of Vascular Endothelial Growth Factor in Fresh versus Frozen Platelet Rich Plasma

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Nada Hosny ◽  
Fikry Goubran ◽  
Basma BadrEldin Hasan ◽  
Noha Kamel
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Growth Factor ◽  
Calcium Gluconate ◽  
Platelet Rich Plasma ◽  
Vascular Endothelial ◽  
High Concentration ◽  
Significant Difference ◽  
Growth Factor Release ◽  
Endothelial Growth Factor ◽  
Vegf Release

Platelet rich plasma (PRP) is hemoconcentration with platelets concentration above baseline values and high concentration of many growth factors. The aim of this study was to assess freezing effect on vascular endothelial growth factor (VEGF) release from PRP using two different activation methods to simplify its use in different clinical applications. PRP was prepared using two-centrifugation steps method from 12 qualified blood donors. VEGF concentrations were measured in fresh PRP and after freezing/thawing for one and three weeks with two methods of activation using (i) calcium gluconate and (ii) calcium gluconate and thrombin. Platelets count was significantly increased compared to baseline whole blood values in all fresh and frozen PRP samples (p value was <0.05). No significant difference was found between VEGF concentrations after activating fresh and frozen-thawed PRP samples for one and three weeks by calcium alone or calcium with thrombin, and also no significant difference was found when freezing period was extended from one to three weeks. Our results showed that platelets count does not correlate with variable levels of VEGF. PRP could be prepared once and preserved frozen for at least three weeks for the next treatment sessions and activation with thrombin addition to calcium will not augment the growth factor release.

Stromal Vascular Fraction and Platelet-Rich Plasma Upregulate Vascular Endothelial Growth Factor Expression to Promote Hair Growth via the Wnt/β-Catenin Signaling Pathway

2019 ◽  
Vol 11 (12) ◽  
pp. 1685-1692
Author(s):  
Yarui Liu ◽  
Jindou Jiang ◽  
Yuan Ye ◽  
Zhehao Li ◽  
Meijun Tan ◽  
...  
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Growth Factor ◽  
Hair Follicle ◽  
Signaling Pathway ◽  
Hair Growth ◽  
Platelet Rich Plasma ◽  
Stromal Vascular Fraction ◽  
Follicle Cells ◽  
Vascular Endothelial ◽  
Endothelial Growth Factor

Androgenetic alopecia (AGA) is a hair loss disease. At present, use of the stromal vascular fraction (SVF) and platelet-rich plasma (PRP) are thought to be the novel, safe, and effective treatment options of AGA, but the mechanism by which SVF and PRP promote hair growth is unclear. Here, we investigated the mechanism underlying the effects of SVF and PRP on hair growth by in vitro culture and in vivo modeling. SVF and PRP promoted hair growth, as was evident from the observation and counting of hair on the back skin of nude mice using ImageJ software. SVF and PRP promoted hair growth, and SVF worked better. We performed nucleic acid extraction with nanomagnetic beads, and the protein levels were extracted with a bicinchoninic acid protein assay kit. The results of western blot analysis and quantitative polymerase chain reaction (qPCR) showed that both SVF and PRP promoted the expression of anti-apoptotic genes. The effect of SVF was better than that of PRP. The results of EdU and hematoxylin and eosin staining showed that SVF and PRP induced the proliferation of hair follicle cells. SVF exerted better effects on the proliferation of hair follicle cells than PRP. Enzyme-linked immunosorbent assay (ELISA) results showed that the expression of the proteins associated with the Wnt/β-catenin process, including vascular endothelial growth factor (VEGF), platelet-derived growth factor (PDGF), alkaline phosphatase (ALP), Wnt10b, and β-catenin, significantly increased in the SVF-treated and PRP-treated dermal/epidermal cells as compared with the control cells. Therefore, SVF and PRP increased the expression of VEGF and PDGF through the Wnt/β-catenin signaling pathway to promote hair growth. The effect of SVF on dermal cells/epidermal cells was stronger than that of PRP, and the difference was statistically significant (P < 0.05).

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