co-transplantation of human ovarian tissue with amh …cme-utilities.com/mailshotcme/material for...
TRANSCRIPT
CO-TRANSPLANTATION OF HUMAN OVARIAN TISSUE WITH AMH-PRODUCING
CELLS INHIBITS RECRUITMENT OF PRIMORDIAL FOLLICLES IN A SHORT AND
LONG TERM GRAFTS
Limor Man M.D, M.Med.Sc
Assistant Professor of Research in Obstetrics and Gynecology
Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine
Weill Cornell Medicine, NYC, NY, USA
Major Obstacle Undermining Viability and Endocrine Output of Ovarian
Tissue Post-Transplantation
• Loss of oocytes during transplantation occurs due to ischemia
before revascularization
• Massive global activation of follicles upon transplantation is an
obstacle to maintaining long-term endocrine output and
salvaging a robust pool
- Baird DT, Webb R, Campbell BK, Harkness LM, Gosden RG. Long-term ovarian function in sheep after ovariectomy and transplantation of autografts stored at -196 C. Endocrinology. 1999 Jan;140(1):462-71.
- Dolmans MM, Martinez-Madrid B, Gadisseux E, Guiot Y, Yuan WY, Torre A, Camboni A, Van Langendonckt A, Donnez J. Short-term transplantation of isolated human ovarian follicles and cortical tissue into nude
mice. Reproduction. 2007 Aug;134(2):253-62.
Loss of Oocytes After Transplantation due to Ischemia
An Exogenous Cell Impetus Improves the Survival of
Co-Transplanted Ovarian Tissue
000
Long-Term Viability and Function of Ovarian Tissue Grafts are Improved by ExECs
Massive Global Activation of Follicles upon Transplantation
%
0
10
20
30
40
50
60
70
Primordial Primary Secondary
2W
3W
14W
%
AMH Exert a Repressive Input on Activation and/or Growth of Follicles
Anti-Mullerian Hormone AMH
• Mullerian Inhibiting Substance/Factor-MIS/MIF
• A dimeric glycoprotein, member of the transforming growth
factor beta superfamily –TGFb
• In females , Not expressed during ovarian sex differentiation
• Produced exclusively by granulosa cells of growing follicles from
the late antenatal stage till menopause
• Pool of the primordial follicles decreased faster In AMH-
Knockout than WT mice
-Rajpert-De Meyts E, Jørgensen N, Graem N, Müller J, Cate RL, Skakkebaek NE. Expression of anti-Müllerian hormone during normal and pathological gonadal development: association with differentiation of Sertoli and granulosa cells. J Clin Endocrinol Metab. 1999 Oct;84(10):3836-44. -Durlinger AL, Kramer P, Karels B, de Jong FH, Uilenbroek JT, Grootegoed JA, Themmen AP. Control of primordial follicle recruitment by anti-Müllerian hormone in the mouse ovary. Endocrinology. 1999 Dec;140(12):5789-96
AMH Dual Effect on Follicular Development
primordial primary preantral antral
AMH AMH
FSH FSH
Metabolic demands
-Durlinger AL, Visser JA, Themmen AP. Regulation of ovarian function: the role of anti-Müllerian hormone. Reproduction. 2002 Nov;124(5):601-9.
Vectors-AMH
Human Endothelial Cells
Efficient Transduction of Cultured ECs/MSC
-Man L, Park L, Bodine R, Ginsberg M, Zaninovic N, Man O.A, Schattman G, Rosenwaks Z, James D.(2017). Engineered endothelium provides angiogenic and paracrine stimulus to grafted human ovarian tissue. Sci Rep. 2017
Experimental Design
Muscle
Fibrin Clot
Ovarian Graft
Confocal Microscopy
Endothelial Cells Lectin-Functional Vessels
AMH-Ab Colocalization
Most Significant Benefit to the Retention of the Quiescent Follicular Pool
AMH-ECs AMH-MSCs
Highest Percentage of Primordial Follicles AMH Producing ECs
A Significant Retention of Primordial Follicles was Noted Also at 14 Weeks
0
10
20
30
40
50
60
Primordial Primary Secondary
Blank-Ecs
AMH-Ecs
P=0.05
P=0.01
Conclusions
• Comparison of different treatments AMH-ExECs revealed the most
significant benefit to the retention of the quiescent follicular pool in
short and long term grafts
• These findings present a cell-based strategy that combines
accelerated perfusion with a direct paracrine delivery of a bioactive
payload to transplanted ovarian tissue
• Improved tissue viability and enforced retention of quiescent follicles
can be combined to increase productivity and longevity of ovarian
tissue grafts
Future Directions
• Utilizing engineered ECs expressing secreted factors to interrogate their impact on human ovarian physiology, using our unique In vivo model
• Using a non-cellular method of delivering secreted factors for future clinical use
• Testing AMH as a chemo protectant agent
Supported by
• ASRM grant
• Clinical and Translational Science Center (CTSC) – Weill Cornell
• Internal (CRMI funding)
Acknowledgements
Laura Park
Richard Bodine
Nikica Zaninovic
Glenn Schattman
Zev Rosenwaks
Daylon James
Omar Alexander Man