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Expression of angiogenic factors in cryopreserved mouse ovaries after heterotopic autotransplantation.

Choi WJ, Seok JS, Choi IY, Park JK, Shin JK, Lee SA, Paik WY, Lee JH - Obstet Gynecol Sci (2015)

Bottom Line: Revascularization is critical for successful ovarian tissue transplantation.VEGF and angpt-2 protein levels were significantly lower in cryopreserved ovaries of groups II and III than in controls (group I, P<0.05), whereas groups II and III did not differ significantly in this regard.After autotransplantation of cryopreserved ovarian tissue, VEGF and angpt-2 protein levels did not differ significantly by technique but tended to be lower than corresponding levels in controls.

View Article: PubMed Central - PubMed

Affiliation: Department of Obstetrics and Gynecology, School of Medicine, Gyeongsang National University, Jinju, Korea. ; Institute of Health Sciences, Gyeongsang National University, Jinju, Korea.

ABSTRACT

Objective: Revascularization is critical for successful ovarian tissue transplantation. Vascular endothelial growth factor (VEGF) and angiopoietin-2 (angpt-2) are the principal mediators of neovascularization. This study was designed to assess VEGF and angpt-2 levels in cryopreserved ovarian tissue after heterotopic autotransplantation.

Methods: Ovarian tissues harvested from ICR mice at 5 to 6 weeks of age were stratified as follows: no cryopreservation (controls, group I); vitrification in VFS-40 (vitrification, group II); and gradual freezing in dimethyl sulfoxide (slow-freezing, group III). Frozen specimens were thawed at room temperature, assaying VEGF and angpt-2 levels 1 week after cryopreservation and 2 weeks after autotransplantation.

Results: VEGF and angpt-2 protein levels were significantly lower in cryopreserved ovaries of groups II and III than in controls (group I, P<0.05), whereas groups II and III did not differ significantly in this regard. After autotransplantation of cryopreserved ovarian tissue, VEGF and angpt-2 protein levels did not differ significantly by technique but tended to be lower than corresponding levels in controls.

Conclusion: Expression of angiogenic factors in ovarian tissue is thought to vary by method of cryopreservation. Our findings indicate that levels of angiogenic factors expressed in cryopreserved ovarian tissue after autotransplantation do not differ appreciably from control levels, regardless of cryopreservation technique.

No MeSH data available.


Related in: MedlinePlus

Western blot analysis: quantitative analysis by group of (A) vascular endothelial growth factor (VEGF) and (B) angiopoietin-2 (angpt-2) after 1 week of vitrification or slow freezing (no cryopreservation of controls). β-actin was used as internal standard. Data were expressed as mean±standard error of three independent experiments. *P<0.05 vs. cryopreservation groups (vitrification and slow freezing).
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Figure 3: Western blot analysis: quantitative analysis by group of (A) vascular endothelial growth factor (VEGF) and (B) angiopoietin-2 (angpt-2) after 1 week of vitrification or slow freezing (no cryopreservation of controls). β-actin was used as internal standard. Data were expressed as mean±standard error of three independent experiments. *P<0.05 vs. cryopreservation groups (vitrification and slow freezing).

Mentions: With cryopreservation, lower levels of VEGF and angpt-2 were expressed relative to controls (P<0.05), and levels did not differ significantly by cryopreservation method (Fig. 3).


Expression of angiogenic factors in cryopreserved mouse ovaries after heterotopic autotransplantation.

Choi WJ, Seok JS, Choi IY, Park JK, Shin JK, Lee SA, Paik WY, Lee JH - Obstet Gynecol Sci (2015)

Western blot analysis: quantitative analysis by group of (A) vascular endothelial growth factor (VEGF) and (B) angiopoietin-2 (angpt-2) after 1 week of vitrification or slow freezing (no cryopreservation of controls). β-actin was used as internal standard. Data were expressed as mean±standard error of three independent experiments. *P<0.05 vs. cryopreservation groups (vitrification and slow freezing).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4588844&req=5

Figure 3: Western blot analysis: quantitative analysis by group of (A) vascular endothelial growth factor (VEGF) and (B) angiopoietin-2 (angpt-2) after 1 week of vitrification or slow freezing (no cryopreservation of controls). β-actin was used as internal standard. Data were expressed as mean±standard error of three independent experiments. *P<0.05 vs. cryopreservation groups (vitrification and slow freezing).
Mentions: With cryopreservation, lower levels of VEGF and angpt-2 were expressed relative to controls (P<0.05), and levels did not differ significantly by cryopreservation method (Fig. 3).

Bottom Line: Revascularization is critical for successful ovarian tissue transplantation.VEGF and angpt-2 protein levels were significantly lower in cryopreserved ovaries of groups II and III than in controls (group I, P<0.05), whereas groups II and III did not differ significantly in this regard.After autotransplantation of cryopreserved ovarian tissue, VEGF and angpt-2 protein levels did not differ significantly by technique but tended to be lower than corresponding levels in controls.

View Article: PubMed Central - PubMed

Affiliation: Department of Obstetrics and Gynecology, School of Medicine, Gyeongsang National University, Jinju, Korea. ; Institute of Health Sciences, Gyeongsang National University, Jinju, Korea.

ABSTRACT

Objective: Revascularization is critical for successful ovarian tissue transplantation. Vascular endothelial growth factor (VEGF) and angiopoietin-2 (angpt-2) are the principal mediators of neovascularization. This study was designed to assess VEGF and angpt-2 levels in cryopreserved ovarian tissue after heterotopic autotransplantation.

Methods: Ovarian tissues harvested from ICR mice at 5 to 6 weeks of age were stratified as follows: no cryopreservation (controls, group I); vitrification in VFS-40 (vitrification, group II); and gradual freezing in dimethyl sulfoxide (slow-freezing, group III). Frozen specimens were thawed at room temperature, assaying VEGF and angpt-2 levels 1 week after cryopreservation and 2 weeks after autotransplantation.

Results: VEGF and angpt-2 protein levels were significantly lower in cryopreserved ovaries of groups II and III than in controls (group I, P<0.05), whereas groups II and III did not differ significantly in this regard. After autotransplantation of cryopreserved ovarian tissue, VEGF and angpt-2 protein levels did not differ significantly by technique but tended to be lower than corresponding levels in controls.

Conclusion: Expression of angiogenic factors in ovarian tissue is thought to vary by method of cryopreservation. Our findings indicate that levels of angiogenic factors expressed in cryopreserved ovarian tissue after autotransplantation do not differ appreciably from control levels, regardless of cryopreservation technique.

No MeSH data available.


Related in: MedlinePlus