BACKGROUND: This retrospective cohort study was to determine the frequency and types of chromosomal abnormalities in Han Chinese women with well-documented premature ovarian failure (POF). METHODS: Karyotype analysis and correlation to phenotypes were performed on 531 Chinese patients with proven POF (FSH > 40 mIU/ml) attending four reproductive centers in China. G-banded metaphase chromosomes were prepared and analyzed, with mosaicism excluded by counting up to 100 cells from lymphocytes. RESULTS: Chromosomal abnormalities were present in 64 of 531 (12.1%) POF cases, of which 32 were X-structural aberrations (7 mosaic): 15 del(Xq), 2 del(Xp), 11 isochromosomes [6 i(Xp); 5 i(Xq)], 1 ring chromosome (mosaic), 1 inversion (mosaic), 1 isodicentric chromosome and 1 complex arrangement. Nine non-mosaic X-autosome translocations were detected, all but 1 involving Xq. Aneuploidy without a structurally abnormal X was found in 19 cases: 7 non-mosaic 45,X, 9 45,X mosaicisms and 3 47,XXX (1 mosaic with 46,XX line). Karyotypic abnormalities were more frequent in patients with primary amenorrhea (15/70, 21.4%) than those with secondary amenorrhea (49/461, 10.6%; P = 0.01). 45,X and 45,X/46,XX mosaicism were the complements most frequently associated with primary amenorrhea (46.7%). Two of the three cases with 46,XY or 45,X/46,XY karyotype presented with 'secondary amenorrhea'. One balanced autosomal Robertsonian translocation was also detected. CONCLUSIONS: The overall prevalence of chromosomal abnormalities was 12.1% in this first large scale report of chromosomal aberrations in Chinese women with POF. In one of the largest samples of women with POF reported from any population, the prevalence of X-structural abnormalities, X-autosome translocations and X aneuploidy confirms the essential role X chromosomal abnormalities play in POF.
BACKGROUND: This retrospective cohort study was to determine the frequency and types of chromosomal abnormalities in Han Chinese women with well-documented premature ovarian failure (POF). METHODS: Karyotype analysis and correlation to phenotypes were performed on 531 Chinese patients with proven POF (FSH > 40 mIU/ml) attending four reproductive centers in China. G-banded metaphase chromosomes were prepared and analyzed, with mosaicism excluded by counting up to 100 cells from lymphocytes. RESULTS:Chromosomal abnormalities were present in 64 of 531 (12.1%) POF cases, of which 32 were X-structural aberrations (7 mosaic): 15 del(Xq), 2 del(Xp), 11 isochromosomes [6 i(Xp); 5 i(Xq)], 1 ring chromosome (mosaic), 1 inversion (mosaic), 1 isodicentric chromosome and 1 complex arrangement. Nine non-mosaic X-autosome translocations were detected, all but 1 involving Xq. Aneuploidy without a structurally abnormal X was found in 19 cases: 7 non-mosaic 45,X, 9 45,X mosaicisms and 3 47,XXX (1 mosaic with 46,XX line). Karyotypic abnormalities were more frequent in patients with primary amenorrhea (15/70, 21.4%) than those with secondary amenorrhea (49/461, 10.6%; P = 0.01). 45,X and 45,X/46,XX mosaicism were the complements most frequently associated with primary amenorrhea (46.7%). Two of the three cases with 46,XY or 45,X/46,XY karyotype presented with 'secondary amenorrhea'. One balanced autosomal Robertsonian translocation was also detected. CONCLUSIONS: The overall prevalence of chromosomal abnormalities was 12.1% in this first large scale report of chromosomal aberrations in Chinese women with POF. In one of the largest samples of women with POF reported from any population, the prevalence of X-structural abnormalities, X-autosome translocations and X aneuploidy confirms the essential role X chromosomal abnormalities play in POF.
Authors: Nicole Tartaglia; Susan Howell; Shanlee Davis; Karen Kowal; Tanea Tanda; Mariah Brown; Cristina Boada; Amanda Alston; Leah Crawford; Talia Thompson; Sophie van Rijn; Rebecca Wilson; Jennifer Janusz; Judith Ross Journal: Am J Med Genet C Semin Med Genet Date: 2020-06-07 Impact factor: 3.908
Authors: John B Harley; R Hal Scofield; Ke Liu; Biji T Kurien; Sarah L Zimmerman; Kenneth M Kaufman; Diana H Taft; Leah C Kottyan; Sara Lazaro; Carrie A Weaver; John A Ice; Adam J Adler; James Chodosh; Lida Radfar; Astrid Rasmussen; Donald U Stone; David M Lewis; Shibo Li; Kristi A Koelsch; Ann Igoe; Mitali Talsania; Jay Kumar; Jacen S Maier-Moore; Valerie M Harris; Rajaram Gopalakrishnan; Roland Jonsson; James A Lessard; Xianglan Lu; Jacques-Eric Gottenberg; Juan-Manuel Anaya; Deborah S Cunninghame-Graham; Andrew J W Huang; Michael T Brennan; Pamela Hughes; Gabor G Illei; Corinne Miceli-Richard; Edward C Keystone; Vivian P Bykerk; Gideon Hirschfield; Gang Xie; Wan-Fai Ng; Gunnel Nordmark; Per Eriksson; Roald Omdal; Nelson L Rhodus; Maureen Rischmueller; Michael Rohrer; Barbara M Segal; Timothy J Vyse; Marie Wahren-Herlenius; Torsten Witte; Bernardo Pons-Estel; Marta E Alarcon-Riquelme; Joel M Guthridge; Judith A James; Christopher J Lessard; Jennifer A Kelly; Susan D Thompson; Patrick M Gaffney; Courtney G Montgomery; Jeffrey C Edberg; Robert P Kimberly; Graciela S Alarcón; Carl L Langefeld; Gary S Gilkeson; Diane L Kamen; Betty P Tsao; W Joseph McCune; Jane E Salmon; Joan T Merrill; Michael H Weisman; Daniel J Wallace; Tammy O Utset; Erwin P Bottinger; Christopher I Amos; Katherine A Siminovitch; Xavier Mariette; Kathy L Sivils Journal: Arthritis Rheumatol Date: 2016-05 Impact factor: 10.995