Male Factor Infertility and Health. Karen Baker, MD Associate Professor Duke University, Division of Urology
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1 Male Factor Infertility and Health Karen Baker, MD Associate Professor Duke University, Division of Urology
2 Fertility and Cancer Heart disease Metabolic syndrome Diabetes Early death Goals: Review literature linking MFI to poor health Discuss possible mechanisms common to MFI and cancer
3 Cardiovascular risk 3.5 million AARP members surveyed ,903 men met criteria 92% +paternity mean age 62.7 yrs 96.4% white Age adjusted cardiovascular mortality risk 2.7/1000 personyears Childless men 17% cardiovascular mortality compared with men with + paternity Eisenberg, Hum Repro 2011
4 Cardiovascular risk 3.5 million AARP members surveyed ,903 men met criteria 92% +paternity mean age 62.7 yrs 96.4% white Age adjusted cardiovascular mortality risk 2.7/1000 personyears Childless men 17% cardiovascular mortality compared with men with + paternity Eisenberg, Hum Repro 2011
5 Chronic disease Insurance claims ,027 infertile men Semen testing + MFI dx 23,860 fertile men Semen testing no MFI dx 79,099 vasectomy Age Smoking Obesity by ICD9 Compared rates of common medical conditions HTN, DM, peripheral vascular disease, cerebrovascular disease, ischemic heart disease, alcohol abuse, bipolar, etc. by ICD9
6 Chronic disease medical disease in MFI vs semen testing and vasectomies DM HR 1.81 (95%CI ) Renal dz HR 1.6 (95%CI ) Peripheral vascular dz HR 1.52 (95% CI ) Ischemic heart dz HR 1.48 (95%CI ) Risk of developing chronic medical dz after dx MFI
7 Chronic disease 344 MFI university fertility center noninterracial couples 293 consecutive agematched fertile controls recruited from hospital Age, BMI, education level, time to first conception, age at first conception Charlson Comorbidity Index Salonia, Eur Uro 2009
8 Chronic disease 344 MFI vs 293 controls MFI Longer to conceive age at first conception BMI Lower educational status Salonia, Eur Uro 2009
9 Chronic disease 344 MFI vs 293 controls MFI 18.6% had comorbidity vs 6.1% controls Salonia, Eur Uro 2009
10 Chronic disease 344 MFI vs 293 controls MFI 18.6% had comorbidity vs 6.1% controls Disease Infertile Fertile Cardiovascular 11 5 Pulmonary 18 1 Connective tissue 4 0 Peptic ulcer 3 0 Liver disease 4 2 Diabetes - complication 11 3 Diabetes + complication 2 0 Renal disease 1 1 Cancer 7 3 Paraplegia 0 1 Metastatic Cancer 1 1 HIV 1 0 Salonia, Eur Uro 2009
11 Chronic disease 183 MFI Annual f/u for 10 years Mean age men (14%) CCI >1 point Cancer was the most common comorbidity 11 solid organ, 1 lymphoma Incidence of 6% Age adjusted prevalence of cancer in Italian men 0.3% Ventimiglia, Eur Uro 2017
12 MFI and cancer 20,433 men with semen analysis in UT ,433 age matched controls Linked to population database and cancer registry Hanson Fertil Steril 2016
13 MFI and cancer 20,433 men with semen analysis in UT testis CA Oligospermia HR 11.9 (CI ) Normospermic HR 2.9 (CI ) Testicular Cancer HR versus fertile men Hanson Fertil Steril 2016
14 MFI and cancer 20,433 men with semen analysis in UT testis CA Oligospermia HR 11.9 (CI ) Normospermic HR 2.9 (CI ) Lowest quartile Asthenospermia HR 4.1 ( ) Poor viability HR 6.6 ( ) Teratospermia HR 4.2 ( ) Hanson Fertil Steril 2016
15 MFI and cancer 20,433 men with semen analysis in UT testis CA Oligospermia HR 11.9 (CI ) Normospermic HR 2.9 (CI ) No association with azoospermia No association between prostate cancer and semen quality* * mean age 32, mean follow up 7.3 yrs Hanson Fertil Steril 2016
16 MFI and cancer 20,433 men with semen analysis in UT testis CA Oligospermia HR 11.9 (CI ) Normospermic HR 2.9 (CI ) No association with azoospermia No association between prostate cancer and semen quality* * mean age 32, mean follow up 7.3 yrs Hanson Fertil Steril 2016
17 Familial risks of MFI 10,511 men completed SA complete information on first degree relatives 10,511 fertile controls 1:1 match age and birth year > 1 naturally conceived child Sibling and cousin data obtained through Utah Population database Anderson, J Urol 2017
18 Familial risks of MFI Subfertile men Controls 10,511 men completed SA complete information on first degree relatives 10,511 fertile controls 1:1 match age and birth year > 1 naturally conceived child Siblings 32,141 Cousins 152,015 Siblings 31,740 Cousins 175,738 Sibling and cousin data obtained through Utah Population database Anderson, J Urol 2017
19 Familial risks of MFI 10,511 subfertile men 10,511 fertile controls cancer siblings of oligospermia HR 2.09 (CI ) ALL siblings of oligospermia HR 3.07 (CI ) No association with Other semen parameters Brain cancer Cousins Anderson, J Urol 2017
20 Familial risks of MFI Men undergoing semen testing in UT Fertile controls Utah population database Matched age + birth year FDR (siblings) SDR (aunts, uncles) Death certificate information Death < age 20 Hanson, Hum Repro 2017
21 Familial risks of MFI No association between poor semen quality and cancer mortality mortality from congenital malformations in siblings of men with MFI Azoospermia HR 2.7 (CI ) Risk linearly as concentration age 1 5 years female gender Hanson, Hum Repro 2017
22 Semen parameters bellwether of male health
23 Semen parameters bellwether of male health Levine, Hum Repro, 2017
24 Spermatogenesis Complex, multistep process DNA replication Meiosis DNA packaging Cellular reconfiguration Acquisition of motility Mehta, A., & Sigman, M. (2013). Chemotherapy effects on spermatogenesis. In L. Applegarth, R. Oates, & P. Schlegel (Authors) & J. Mulhall (Ed.), Fertility Preservation in Male Cancer Patients
25 Spermatogenesis Complex, multistep process DNA replication Meiosis DNA packaging Cellular reconfiguration Acquisition of motility
26 DNA repair the link? DNA repair is essential to somatic and genomic health Multiple mechanisms contribute to genomic fidelity DNA polymerase proofreading Mismatch repair (MMR) Base excision repair (BER) Nucleotide excision repair (NER) Single strand break repair (SSBR) Double strand break repair (DSBR)
27 Homologous recombination Meiosis Genetic recombination crossing over Basis of genetic diversity Somatic cells Double stranded DNA repair Errors in recombination activate checkpoint mechanisms Meiotic arrest and cell death
28 DNA repair via NER Excision repair crosscomplementing protein (ERCC1) NER pathway Homologous recombination ERCC1-XPF complex removes single strand ends adjacent to regions of homology Protect short telomeres Linked to multiple cancers Colorectal, breast, gastric, gliomas, lung expression response to cisplatin
29 Strong ERCC1 expression in testis
30 Strong ERCC1 expression in testis Expression highest late pachytene to early spermatid
31 Strong ERCC1 expression in testis Expression highest late pachytene to early spermatid ERCC1-/- mice had decreased testicular size
32 Strong ERCC1 expression in testis Expression highest late pachytene to early spermatid ERCC1-/- mice had decreased testicular size Decrease seminiferous tubule size Decrease # germ cells Areas of germ cell aplasia (SCO) WT ERRC1-/- * Sertoli cell only
33 Strong ERCC1 expression in testis Expression highest late pachytene to early spermatid ERCC1-/- mice had decreased testicular size Decrease seminiferous tubule size Decrease # germ cells sperm DNA fragmentation DFI by ERCC1 genotype
34 Mismatch repair (MMR) MMR proteins critical to DNA repair during replication Corrects errors of DNA polymerase that escape the 3 5 exonucleolytic proofreading activity Recognize daughter strand MMR also critical to homologous recombination
35 Mismatch repair (MMR) Highly conserved Mut = inactivation causes hypermutable strains Heterodimers MutS MSH2 + MSH6 MSH2 + MSH3 MutL MLH1 + PMS MSH4 + MSH5
36 Mismatch repair (MMR) MMR is linked to Lynch syndrome Germline mutation ~ 4% colon cancer MSH2 and MLH1 most common mutations Epigenetic silencing MLH1 ~10% colon cancer
37 Mismatch repair (MMR) germ cells + germ cell aplasia (SCO) TG ERCC1 -/- MSH2 -/- * Sertoli cell only Paul 2007
38 Mismatch repair (MMR) germ cells + germ cell aplasia (SCO) seminiferous tubules TG ERCC1 -/- MSH2 -/- Paul 2007
39 Mismatch repair (MMR) germ cells + germ cell aplasia (SCO) seminiferous tubules ERCC1-/- apoptosis TG ERCC1 -/- MSH2 -/- * p <0.05 Paul 2007
40 Mismatch repair (MMR) germ cells + germ cell aplasia (SCO) seminiferous tubules ERCC1-/- apoptosis epididymal sperm *** p <0.001 Paul 2007
41 Mismatch repair (MMR) germ cells + germ cell aplasia (SCO) seminiferous tubules ERCC1-/- apoptosis epididymal sperm sperm DFI MSH2 -/- TG ERCC1 -/- MSH2 -/- ** p <0.01 Paul 2007
42 13 severe MFI 7 maturation arrest 6 hypospermatogenesis 5 GCT 10 OA = fertile controls Testis biopsy Histology RT-PCR MLH1, MLH3, PMS2, MSH4, MSH5
43 13 severe MFI vs 5 GCT vs 10 controls RT-PCR MLH1, MLH3, PMS2, MSH4, MSH5 expression MMR in severe MFI MFI Fertile controls * p<0.05 ** p<0.01 *** p<0.001
44 13 severe MFI vs 5 GCT vs 10 controls RT-PCR MLH1, MLH3, PMS2, MSH4, MSH5 expression correlated with degree of spermatogenic dysfunction Maturation arrest Hypospermatogenesis * p<0.05 ** p<0.01 *** p<0.001
45 13 severe MFI vs 5 GCT vs 10 controls RT-PCR MLH1, MLH3, PMS2, MSH4, MSH5 expression MMR in testis tumors Germ cell tumors Fertile controls * p<0.05 ** p<0.01 *** p<0.001
46 MMR 1,292 infertile males 268 NOA 256 oligospermia 768 idopathic MFI
47 MMR 1,292 infertile males 480 controls Semen parameters Genotype MMR genes MLH1, MLH3, PMS2, MSH4, MSH5 Sperm DNA fragmentation Controlled for age, smoking, drinking
48 MMR 1,292 infertile males 480 controls Age NS Drinking NS % smokers in MFI pack years Case 1 = NOA + oligospermia Case 2 = idiopathic MFI Ji, BMC Medicine 2012
49 MMR 1,292 infertile males 480 controls MLH1, PMS2, MSH5 NOA and oligospermia PMS2 idiopathic MFI Case 1 = NOA + oligospermia Case 2 = idiopathic MFI Ji, BMC Medicine 2012
50 MMR 1,292 infertile males 480 controls MLH1 Sperm DNA fragment PMS2 MSH5 MLH1, PMS2, MSH5 NOA and oligospermia PMS2 idiopathic MFI DFI MLH1 and PMS2 Ji, BMC Medicine 2012
51 But wait what about chronic medical disease?
52 NER and vascular disease ERRC1 d/- vs WT mice Truncated ERCC1 protein senescent vascular cells Accelerated vasodilator function vascular stiffness systolic pressure pulse pressure reactive hyperemia
53 Conclusion Poor semen parameters are bellwether of poor overall health DNA repair mechanisms are critical to genomic integrity Meiosis period of vulnerability Defects in ERRC1 and various MMR proteins are associated with spermatogenic failure, cancer, and vascular disease Defects in DNA repair plausible link between MFI and significant medical comorbidities
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