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Background:
Systematic Review

Identification of Genetic Causes in Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome: A Systematic Review of the Literature

by
Varvara Ermioni Triantafyllidi
1,*,
Despoina Mavrogianni
2,
Andreas Kalampalikis
1,
Michael Litos
3,
Stella Roidi
1 and
Lina Michala
1
1
1st Department of Obstetrics and Gynecology, ‘Alexandra’ General Hospital, National and Kapodistrian University of Athens, 80 Vasilissis Sofias Ave, 11528 Athens, Greece
2
Molecular Biology Unit, Division of Human Reproduction, 1st Department of Obstetrics and Gynecology, ‘Alexandra’ General Hospital, National and Kapodistrian University of Athens, 80 Vasilissis Sofias Ave, 11528 Athens, Greece
3
Department of Obstetrics & Gynecology, Konstantopouleio General Hospital of Nea Ionia, 14233 Athens, Greece
*
Author to whom correspondence should be addressed.
Children 2022, 9(7), 961; https://doi.org/10.3390/children9070961
Submission received: 5 June 2022 / Revised: 19 June 2022 / Accepted: 22 June 2022 / Published: 27 June 2022
(This article belongs to the Collection Novel Treatments, Approaches, Prevention Strategies and Insights in Pediatric, Adolescent, and Gynecological Endocrinology)
Browse Figure
Review Reports Versions Notes

Abstract

:
Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome is a congenital condition characterizing females with absence of the uterus and part of the vagina. Several genetic defects have been correlated with the presence of MRKH; however, the exact etiology is still unknown due to the complexity of the genetic pathways implicated during the embryogenetic development of the Müllerian ducts. A systematic review (SR) of the literature was conducted to investigate the genetic causes associated with MRKH syndrome and Congenital Uterine Anomalies (CUAs). This study aimed to identify the most affected chromosomal areas and genes along with their associated clinical features in order to aid clinicians in distinguishing and identifying the possible genetic cause in each patient offering better genetic counseling. We identified 76 studies describing multiple genetic defects potentially contributing to the pathogenetic mechanism of MRKH syndrome. The most reported chromosomal regions and the possible genes implicated were: 1q21.1 (RBM8A gene), 1p31-1p35 (WNT4 gene), 7p15.3 (HOXA gene), 16p11 (TBX6 gene), 17q12 (LHX1 and HNF1B genes), 22q11.21, and Xp22. Although the etiology of MRKH syndrome is complex, associated clinical features can aid in the identification of a specific genetic defect.

1. Introduction

The Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome, or Müllerian aplasia, is a syndrome that affects females and is characterized by the absence of the uterus and the upper part of the vagina. These individuals have a normal karyotype (46, XX) and usually normal ovarian function [1]. It is divided into two types: Type I is characterized by uterovaginal aplasia, while Type II is additionally related to extragenital anomalies, most commonly renal (30–40%), skeletal, ear, and cardiac anomalies [2,3]. The reported incidence rate of MRKH syndrome is around 1:5000 live female births and, due to this rarity, it is poorly investigated [2,4]. In most cases, MRKH syndrome is diagnosed due to the presence of primary amenorrhea. The impact of the MRKH diagnosis and the associated psychological burden on young girls is significant [5]. The treatment of the syndrome includes vaginal dilation or, in case of failure or non-compliance with treatment, operative creation of a neovagina. Concerning the fertility of MRKH individuals, surrogacy is an option; however, uterine transplantation has been recently introduced [6].
Embryologically, the female reproductive system in humans derives from the Müllerian or Paramesonephric Ducts (MDs), which give rise to the uterus, cervix, and the upper two-thirds of the vagina at around the fifth to sixth week of gestation [1,7,8]. Several gene defects can affect the embryogenetic pathways of the development of the female reproductive system and cause MRKH syndrome.
Evidence of the inheritance pattern of MRKH syndrome remains scarce, due to the fertility restrictions of MRKH patients in the past; hence, no family trees were available to study [9,10]. The majority of the cases are sporadic, though there have been reports of familial cases, with a recent increase in the latter due to the introduction of surrogacy and uterine transplantation [10,11]. First-degree relatives of MRKH patients seem to have a 1–5% risk of congenital uterine anomalies as in most multifactorial disorders [12]. The majority of the studies of familial cases suggest an autosomal dominant inheritance pattern limited to the female sex, implying that the genetic defect is typically inherited by the father [13]. Wolffian duct hypoplasia, or agenesis, and other defects such as renal anomalies, hearing impairment, and skeletal deformities have been reported in the males of these families, similar to MRKH patients [10,11,14]. Another finding of note is that some articles refer to the presence of discordant monozygotic twins with MRKH syndrome, implying that environmental factors, i.e., epigenetic changes, may play a role in gene expression affecting Müllerian duct development [15,16,17,18,19,20,21,22,23].
The aim of this study was to systematically review the available literature and to summarize all genetic defects that have been described in MRKH patients. In addition, this study aimed to present commonly studied genes in correlation with their associated clinical features in order to provide guidance to clinicians and geneticists in their efforts to identify a specific genetic defect in each patient. This information can aid in genetic counseling and lead to more favorable outcomes through the early detection of specific genetic defects in pregnancy and the possibility of gene therapy in the future. Ultimately, these insights could be of use in guiding further genetic studies on MRKH syndrome.

2. Materials and Methods

For the conduction of this systematic review, a protocol based on the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines, was used, following the PRISMA assessment checklist [24]. The search terms for our research included: Mayer–Rokitansky–Küster–Hauser syndrome; Rokitansky; uterine aplasia; uterine abnormalities; and genetics. We searched four different databases: Pubmed, ScienceDirect, Scopus, and Web of Science. The search was performed in December 2021 and was updated on 25 May 2022. All studies that reported on the genome of human female patients with MRKH and/or CUAs from 1994 to 25 May 2022 were included; studies not published in English, studies on animals, non-research studies, non-genetic studies on MRKH or CUAs, and studies not concerning MRKH or CUAs were excluded. The study selection was conducted by two independent reviewers (V.T. and A.K.), while a third reviewer (L.M.) assisted in decision-making when there was a conflict of opinion. The retrieved articles were compiled and de-duplicated. Additional eligible studies were retrieved by hand searching the citations from all articles. All studies meeting the inclusion criteria were included in the review. For every eligible article, information regarding the date of publication, the main findings, and the number of patients and controls were recorded. The study did not involve contact with humans, so the need for ethical approval was waived. This review was not registered. The selection and screening process are presented in the PRISMA flowchart shown in Figure 1.

3. Results

A total of 162 articles were identified from all databases using the search strategy, of which 32 were duplicates. In total, 30 eligible studies were identified from the hand search of the citations of the articles. According to both our inclusion and exclusion criteria, in total, 76 studies were considered eligible and included in this SR. Table A1 presents all 76 studies, sorted by year of publication, along with the main results and the number of individuals with MRKH syndrome or CUAs and controls who were studied.
The most reported chromosomal regions and the possible genes implicated are: 1q21.1 (RBM8A gene), 1p31-1p35 (WNT4 gene), 7p15.3 (HOXA gene), 16p11 (TBX6 gene), 17q12 (LHX1 and HNF1B genes), 22q11.21, and Xp22.
Table 1 presents the chromosomal regions most commonly implicated in MRKH syndrome and CUAs and the suspicious genes involved, as indicated by animal and human studies. This table also presents the clinical features associated with defects in the respective genetic locations, the main results of non-human studies regarding these chromosomal regions, and whether they are linked with Type I or Type II MRKH.

4. Discussion

In this review, we have thoroughly analyzed the studies examining the genetic causes of MRKH syndrome. We endeavored to present our findings comprehensively and aimed to help clinicians associate clinical presentations with specific genetic defects. The need for genetic advice has become increasingly important in recent years due to the introduction of surrogacy and, most recently, uterine transplantation. The information included in this review regarding the genetic cause and pathogenesis of MRKH syndrome could significantly improve the counseling offered to individuals with MRKH and their families.
Our search confirmed that the genetic background of MRKH is poorly studied [25,28]. Mice models with targeted mutagenesis identified multiple genes that affect the development and differentiation of the female reproductive system during embryogenesis (Table 1). According to these studies, a number of candidate genes have been proposed as the causative factor for MRKH syndrome in humans and have been analyzed using array-comparative genomic hybridization (CGH) and whole-genome sequencing (WGS). Many MRKH patients have been reported to carry chromosomal anomalies that affect multiple chromosomal regions.
Despite the myriad of sporadic gene variants found through our search, we have identified a recurring pattern of affected chromosomal locations. Most reported chromosomal regions with their most implicated genes are: 1q21.1 (RBM8A gene), 1p31-1p35 (WNT4 gene), 7p15.3(HOXA gene), 16p11 (TBX6 gene), 17q12 (LHX1 and HNF1B genes), 22q11.21, and Xp22 [10,25,26,28,33,43,44,45,46,48,54,55,58,59,60,61].
1q21.1
Affected regions in 1q21.1, a well-known location in TAR syndrome cases (thrombocytopenia/absent radius), have been identified in patients with Müllerian malformations [25,26,27,28,30]. More accurately, variants of the RBM8A gene—which is located in this chromosomal region—have been proposed as the possible cause of MRKH syndrome and gonadal dysgenesis, as this gene mainly affects oocyte differentiation and determination of the primordial germ cells [28,29].
1p31-1p35
WNT4 is important in MD development during embryogenesis. It plays a double role in the female gonad: it controls female development and prevents testes formation [28,62,63,64,65,66]. For this reason, when MRKH syndrome is combined with signs of hyperandrogenism, heterozygous variants of the WNT4 gene may be considered. Moreover, folliculogenesis in affected women can also be disrupted because of the gene’s role in the development of the gonad [28,65].
7p15.3
Τhe HOX clusters belong to a large family of homeobox-containing genes. The HOXA genes affect the development of the female reproductive system, as has been indicated by human and animal studies, and are, therefore, considered to be strong candidates for MRKH syndrome [10,67]. Despite their central role in the formation of MD, variants of these genes have been identified in only a few MRKH patients and are of unknown significance [10,68].
16p11.2
Deletions in 16p11.2 have been associated with autism and other neurological disorders (i.e., epilepsy, seizures, and learning disabilities), as well as congenital uterine anomalies [28,33]. The TBX6 gene, which is located in this region, encodes a transcription factor that affects the embryogenetic development and, more specifically, the differentiation of the mesoderm. Therefore, it is suggested to be a putative candidate for MRKH syndrome [9,12,27,28,30,34,36,37,38].
17q12
It is known that 17q12 is the most affected chromosomal location in MRKH syndrome [25,26,27,33,43,45]. Associated anomalies of genetic defects in this location include renal cysts, mild facial malformations, severe cognitive disabilities, and seizures [26,46].
Specifically, LHX1 (LIM homeobox protein 1) and HNF1B (hepatocyte nuclear factor 1B; also known as TCF2) genes seem to be important candidates based on the prevalence of their variants in MRKH patients and their established roles in the development of the reproductive and urinary system [28].
LHX1 has been associated with MRKH type II and unilateral renal agenesis [25,34,44]. The gene influences CNS formation [69,70] and has also been described in MRKH patients with mild mental and learning disabilities [26,28,44,48].
Variants and deletions of the HNF1B gene are characteristic in renal cysts and diabetes, which may be explained by the expression of the HNF1B gene in the kidney and pancreas; HNF1B is also expressed in the Wolffian and Müllerian ducts and plays a central role in their formation [53]. Some researchers have reported variants of the HNF1B gene in familial cases of CUAs, often associated with kidney malformations and Maturity Onset Diabetes of the Young (MODY) [49,50].
22q11.21
Deletions in 22q11.21 are responsible for DiGeorge or Velocardiofacial Syndrome (DG/VCFS). This syndrome can be manifested with variable phenotypes, occasionally including CUAs; therefore, MRKH syndrome may be a part of DG/VCFS. Changes in the TBX1 gene, which is located in 22q11.21, are considered to be responsible for DGS/VCFS. However, this gene has not been associated with MRKH. This finding suggests that other genes in this region may be responsible for the appearance of CUAs [25,26,27,28,33,56].
Another issue of interest is the lack of large cohort studies associating a single gene variant solely with MRKH type I or MRKH type II. This may be due to the fact that genes that affect MD development during embryogenesis can also affect the development of the urinary system, owing to their common origin. Moreover, the sample of individuals in most genetic studies consists of both individuals with MRKH type I and individuals with MRKH type II; consequently, LHX1 and GREB1L genes can affect the development of both the reproductive and urinary systems and, therefore, have been correlated mainly with MRKH II individuals [1,25,34,44,71,72,73,74]. As larger and more specialized studies using Whole-Exome Sequencing techniques emerge, other chromosomal locations and a clearer association between either MRKH type I or MRKH type II and a specific gene variant may be identified.

5. Conclusions

The genetic causes of MRKH syndrome remain elusive. Although some cases are familial, most cases are sporadic. In this study, we summarized and analyzed the most frequently reported genetic defects associated with MRKH syndrome in the available literature. The most reported chromosomal regions and the possible genes implicated are 1q21.1 (RBM8A gene), 1p31-1p35 (WNT4 gene), 7p15.3 (HOXA gene), 16p11 (TBX6 gene), 17q12 (LHX1 and HNF1B genes), 22q11.21, and Xp22.
As there is a wider adoption of WGS techniques in MRKH studies, it is likely that, in the future, more genes and genetic regions will be identified. This information is particularly important because it can help clinicians associate clinical features in MRKH individuals with specific chromosomal regions and guide genetic counseling offered to patients and their families. Based on this knowledge, the prevention of the syndrome could also be possible through the development of appropriate gene therapy. However, larger cohort studies are necessary to elucidate the genetic basis of the syndrome.

Author Contributions

Conceptualization, L.M. and V.E.T.; methodology, A.K.; software, S.R.; validation, L.M., M.L. and V.E.T.; formal analysis, D.M.; investigation, V.E.T. and D.M.; data curation, D.M.; writing—original draft preparation, V.E.T.; writing—review and editing, V.E.T. and A.K.; visualization, L.M.; supervision, L.M.; project administration, D.M. All authors have read and agreed to the published version of the manuscript.

Funding

This research received no external funding.

Institutional Review Board Statement

Not applicable since this study was a SR.

Informed Consent Statement

Not applicable since this study was a SR.

Data Availability Statement

Available upon request.

Conflicts of Interest

The authors declare no conflict of interest.

Appendix A

Table
Table A1. Studies included in this SR.
Table A1. Studies included in this SR.
No.1st Author
Date of Publication
Reference		Main ResultsGroup of Patients
1Haiping Li, 2022 [75]Variations of EMX240 MRKH individuals and 140 individual controls
2Chunfang Chu, 2022 [76]Variants of nine genes: TBC1D1, KMT2D, HOXD3, DLG5, GLI3, HIRA, GATA3, LIFR, and CLIP1 (n = 9)10 MRKH individuals
3Domenico Dell’Edera, 2021 [77]Microduplications in 22q11.21 (n = 1)Case Report: a MRKH individual
4Mikhael S, 2021 [78]Variants of: WNT4, LAMC1, RARA, HOXA10, PAX2, and WNT9B, TBX6, SHOX, MMP14, and LRP10111 MRKH individuals
5Chen N, 2021 [79]Variants of 7 genes: PAX8 (n = 4), BMP4 (n = 2), BMP7 (n = 2), TBX6 (n = 1), HOXA10 (n = 1), EMX2 (n = 1), and WNT9B (n = 1)592 MRKH individuals (442 Chinese and 150 of mixed ethnicity) 941 individual controls
6Pontecorvi P, 2021 [80]Altered gene expression pattern in PRKX, MUC1, HOXC8, GREB1L36 MRKH individuals
7Jacquinet A, 2020 [81]Variants of GREB1L (n = 4 families and 5 individuals)9 families with CUAs and/or kidney malformations
68 individuals with CUAs
8Monika Anant, 2020 [82]18p deletion (n = 1)Case Report: MRKH II individual with 18p deletion syndrome
9Smol T, 2020 [83]Microdeletion in 2q12.1q14.1 (involving PAX8) and microdeletion of SHOX locus (n = 1)Case Report: a MRKH patient with congenital hypothyroidism
10Herlin M K, 2019 [71]Variants of GREB1L (n = 4)A three-generation family with CUAs
11Backhouse B, 2019 [35]Variants (n = 6) and a deletion (affecting TBX6) (n = 1) of 16p11.2 8 MRKH and MURCS individuals
12Pan H X, 2019 [84]De novo changes in BAZ2B, KLHL18, PIK3CD, SLC4A10 and TNK29 MRKH Ι individuals and their parents
13Tewes A C, 2019 [37]Variants and substitution of TBX6 (n = 4)125 MRKH individuals: 26 MRKH I, 27 MRKH II and 72 individuals with Müllerian ducts fusion anomalies
135 individual controls
14Chunfang Chu, 2019 [38]Deletion of the 16p11.2 (affecting TBX6) (n = 1)5 individuals with distal vaginal atresia
15Eggermann T, 2018 [85]Failing to identify altered imprinting marks of differentially methylated regions PLAGL1, GRB10 and MEST, H19 and KCNQ1OT1, MEG3, SNRPN, DIRAS, NESPAS and GNAS53 MRKH I individuals and 52 patients with a MRKH II individuals
16AlSubaihin A, 2018 [57]Tetrasomy of the pericentromeric region of chromosome 22 (n = 1)Case Report: a MRKH individual with CES
17Takahashi K, 2018 [86]De novo variants of MYCBP2, NAV3, and PTPN3 (n = 3 families) and a variant of MYCBP2 (n = 1)10 MRKH individuals, including three MRKH individuals from trio-based families and 7 unaffected individuals
18Demir Εksi, 2018 [36]Variants of BM8A, CMTM7, CCR4, TRIM71, CNOT10, TP63, EMX2, and CFTR (n = 4)19 MRKH individuals
19Ledig S, 2018 [46]Microdeletions and microduplications in 17q12, 22q11.21, 9q33.1, 3q26.11 and 7q31.1. (n = 8)103 individuals with CUAs
20Brucker SY
2017 [87]		Variants of OXTR (n = 18) and ESR1 (n = 1) 93 MRKH individuals (68 type I and 25 type ΙΙ)
21Williams L S, 2017 [51]Copy number variants of WNT4, HNF1B, or LHX1 (n = 6), but no point change (n = 100)147 MRKH individuals and their families
80 North American MRKH individuals, 58 with other family members and 22 singletons 67 Turkish MRKH individuals, (41 with family members and 26 singletons.)
22Xing Q, 2016 [88]Missense change of DACT1 (n = 1)100 individuals with Müllerian duct anomalies
200 individual controls
23Waschk D E J, 2016 [47]Variant of WNT9B (n = 5) 226 individuals with Müllerian duct anomalies, including 109 MRKH individuals
135 individual controls
24Wenqing Ma, 2015 [89]Polymorphisms in WNT9B and PBX1
Epistatic effect of AMH, PBX1, WNT7A and WNT9B		182 unrelated Chinese MRKH individuals (155 type I and 27 type II) and 228 individual controls
25Rall K, 2015 [16]Duplication of MMP14 and LRP10 (n = 1 affected twin) 5 MRKHS-discordant monozygotic twin pairs
26Tewes A C, 2015 [30]Variants of RBM8A (n = 13)
TBX6 (n = 5) 		167 individuals with CUAs: 116 MRKH and 51 with other anomalies of the Müllerian ducts
94 individual control
27Liu S, 2015 [90]Novel nonsense variants of EMX2 (n = 1)517 individuals with incomplete Müllerian fusion
563 individual controls
28Murry, 2015 [91]No pathogenic CNCs (n = 20)20 individuals with CUA
29McGowan R, 2015 [27]Microdeletion and microduplication 1q21.1, 7p14.3, 16p11.2, 17q12, and 22q11.21-q11.23 and possibly implicating several genes (LHX1, BBS9, HNF1β, and TBX6) (n = 9)35 individuals with Müllerian disorders
30Chen M J, 2015 [92]Deletions at 15q11.2 (80%), 19q13.31 (40%), 1p36.21 (40%) and 1q44 (40%) (n = 5),1q21.1 (n = 2)
Damaging variants of HNRNPCL1, OR2T2, OR4M2, ZNF816 and PDE11A		7 MRKH I individuals
31Nodale C, 2014 [93]
Upregulation of MUC1 (n = 8) and significant upregulation of HOXC8 (n = 3)
Downregulation of HOXB2 (n = 7) and HOXB5 (n = 7) and Notch ligands JAG1 (n = 6) and DLL1 (n = 5)		8 out of 16 MRKHS individuals underwent reconstruction of neovagina with an autologous vaginal tissue and 5 individual controls
32Wang M, 2014 [94]Variants of WNT9B (n = 1)42 Chinese MRKH individuals and 42 individual controls
33Deqiong Ma, 2014 [95]Deletion at 2q13q14.2 (including PAX8) (n = 1)Case Report: 1 individual with Müllerian agenesis and hypothyroidism
34Sandbacka M, 2013 [34]Variations including 16p11.2 and 17q12 deletions (8/50) or variations in TBX6 or LHX1 in MA patients (30/112)112 MRKH I individuals
35Ekici AB, 2013 [96]Variations HOXA10 and HOXA13 20 MRKH individuals, 7 non-MRKH individuals with genital tract anomalies and 53 individual control
36Ledig S, 2012 [44]No changes in HNF1B
Variants of LHX1 (n = 1/62)		62 MRKH individuals (23 MRKH I and 39 MRKH II)
37Chang X, 2012 [97]No perturbation that indicates significance of WNT4189 Chinese individuals with CUAs (10 MRKH, 5 Müllerian aplasia and 174 incomplete Müllerian fusion)
38Ravel C, 2012 [98]No significant changes were observed between the MRKH individuals and control group for LAMC1 and DLGH1 gene polymorphisms.12 MRKH individuals
39Mingdi Xia, 2012 [52]No significant variants (n = 0/96) but a rare polymorphism of LHX1 (n = 1/77)For variants of LHX: 96 individuals with CUAs and 105 individual controls
40Wang P, 2012 [99]Variant of PAX2 (n = 1)192 Chinese individuals with CUAs (15 with uterine aplasia and 177 with incomplete Müllerian fusion) and 192 ethnic-matched individual controls
41Hinkes B, 2012 [45]Microdeletion in 17q12 (involving HNF1β and LHX1) (n = 1)Case Report: 1 MRKH individual with right kidney aplasia
42Rall K, 2011 [23]293 genes with altered expression and 194 genes differentially methylated 8 MRKH individuals and
8 individual controls
43Morcel K, 2011 [55]Deletion in 4q34-qter, 8p23.1, 10p14 and 22q11.2 (n = 4)57 MRKH individuals
44Philibert P, 2011 [66]Variants of WNT4 (n = 1)4 individuals with Müllerian duct abnormalities and hyperandrogenism
45Nik-Zainal S, 2011 [33]Microdeletion at 16p11.2 (n = 4), microdeletion at 17q12 (n = 4), 22q11.2 (n = 1) 38 MRKH I individuals and 25 MRKH II individuals
46Sandbacka M, 2011 [100]No association between hypomethylation of the H19 imprinted control region but aberrant methylation (n = 3/16)83 individuals with CUAs
47Jinlong Ma, 2011 [101]Polymorphisms in PBX1 (n = 2) 192 Chinese individuals with CUAs
48Ledig S, 2011 [25]Microdeletions and -duplications in 1q21.1, 17q12, and 22q11.21 involving LHX1 and HNF1B gene (n = 48)56 MRKH individuals
49Gervasini C, 2010 [102]Partial duplication of SHOX (n = 5)30 MRKH individuals 53 individual controls
50Acién P, 2010 [103]No microdeletions in 17q12 and 22q11.21 (n = 1)Case Report: 1 MRKH individual with pulmonary hypoplasia
51Liatsikos S A, 2010 [58]No causative variants of HOX A10 and HOX A1130 individuals with MDAs
100 individual controls
52Richard A Oram, 2010 [104]Variants or deletion of HNF1B (n = 9/50 individuals with both CUAs and renal abnormalities)50 individuals with both CUAs and renal abnormalities
58 individuals with isolated CUAs
53Bernardini L, 2009 [43]Deletion in 17q12 (involving TCF2 and LHX1 genes) (n = 2)22 MRKH individuals
54Ravel C, 2009 [105]Variants of WNT4, WNT5A, WNT7A, and WNT9B11 MRKH individuals
55Hofstetter G, 2008 [106]No major deletions or duplications in 22q11.1 12q24.1. and 3q27 (n = 1)Case report: 1 MURCS individual
56Mencarelli M A, 2008 [48]Deletions in 7q31, 14q21.1, Xq25 and duplications in
12p11.22, 12q21.31, 13q31.1, 17q12, Xp22.31, Xq28		84 individuals with mental problems and congenital anomalies (including CUAs)
57Philibert P, 2008 [65]Variants of WNT4 gene 28 individuals with CUAs
100 individual controls
58Drummond JB, 2008 [107]No variants of the GSK-3beta phosphorylation sites on exon 3 of beta-catenin gene (n = 12)12 MRKH patients
59Lalwani S, 2008 [108]No HOXA10 gene variants26 individuals with CUAs
30 individual controls
60Sundaram U T, 2007 [54]Deletion in 22q11.2 (n = 2)2 individuals with absent uterus and unilateral renal agenesis
61Cheroki C, 2007 [26]Submicroscopic genomic imbalances in 1q21.1, 17q12, 22q11.21, and Xq21.3114 MRKH II individuals
62Biason-Lauber A, 2007 [64]Variants of WNT4 (n = 1)Case report: 1 MRKH individual
63Burel A, 2006 [109]No variants of HOXA7-HOXA13 region
(n = 6)		6 MRKH individuals
64Cheroki C, 2006 [56]Deletion in 22q11 (excluding WNT-4, RARgamma, RXR-alpha) (n = 1)25 MRKH individuals
65Oppelt P, 2005 [110]AMH promoter sequence variations cannot the cause of aberrant AMH expression leading to Müllerian duct formation disorders 30 MRKH individuals
48 individual controls
66Clément-Ziza Mi, 2005 [111]No significant variations of WNT4 (n = 19)19 MRKH individuals
67Zenteno J C, 2004 [112]Nο significant difference in Polymorphisms AMH and AMHR genes between MRKH individuals and controls 15 individuals with Mullerian agenesis
25 individual controls
68Biason-Lauber A, 2004 [63]Variants of the WNT4 (n = 1)Case Report: 1 MRKH individual
69Plevraki E, 2004 [113]Positive TSPY gene (n = 2)6 MRKH individuals
70Klipstein S, 2003 [114]GALT enzyme do not affect PMD formation 32 individuals with CUAs
138 individual controls
71Aydos S, 2003 [115]Deletion of Xq (n = 1)Case Report: 1 MRKH individual with gonadal dysgenesis
72Timmreck LS, 2003 [116]Variants of CFTR (n = 2)25 individuals with CUAs
73Bingham C, 2002 [49]Changes in HNF-1beta gene (n = 2 families) 9 families with renal abnormalities and a personal or family history of female genital tract malformations, but no history of diabetes
74Resendes D L, 2001 [117]No changes or rare polymorphism in AMH and the AMHR genes (n = 22) 22 individuals with CUAs
96 individual controls
75Lindner T H, 1999 [50]Deletion in HNF-1beta gene1 Norwegian family, N5, with a syndrome of mild diabetes, progressive non-diabetic renal disease and severe genital malformations
76Cramer D W, 1996 [118]Carriers for the N314D variants of GALT (n = 6/13 individuals with Müllerian agenesis and 16/113 individual controls)13 individuals with vaginal agenesis and their mothers
113 individual controls

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Children 09 00961 g001 550
Figure 1. Identification process of the studies included in the Systematic Review.
Figure 1. Identification process of the studies included in the Systematic Review.
Children 09 00961 g001
Table
Table 1. The most common chromosomal regions and genes associated with MRKH, their associated clinical presentation, animal studies of these genes, and phenotype of MRKH related to defects in these genes.
Table 1. The most common chromosomal regions and genes associated with MRKH, their associated clinical presentation, animal studies of these genes, and phenotype of MRKH related to defects in these genes.
Chromosome LocationSuspected Genes InvolvedAssociated SyndromesNon-Humans StudyPhenotypeReferences
1q21RBM8ATAR syndrome (thrombocytopenia, absence of the radius)
[25,26,27,28]		Drosophila melanogaster: RBM8A encodes Y14 protein, which affects oocyte differentiation and determination of primordial germ cells [29]Type I + II [25,26,27,30]
16p11.2TBX6Autism spectrum disorders, neurological disorders,
unaffected persons [28]		Mouse models: Deletion of TBX6 presents skeletal (mainly vertebral) and urinary tract malformations [31,32]Type I + II[27,30,33,34,35,36,37,38]
17q12LHX1Anomalies in the embryogenesis, in body axis formation [28,39]Mouse model:
LHX1 null mutant mice are characterized by absent uterus and oviducts [40]
Mouse model:
LHX1 mutant mice had
lack of kidneys and anencephaly [28,41]
Mouse embryos with decreased LHX1 activity had lower capacity of primordial germ cells (PGCs; [42])		Type I + II[25,26,33,34,43,44,45,46,47,48,49,50,51,52]
HNF1BRenal cysts and diabetes [28]Mouse models: Expression of HNF1B in MDs and in epithelial tissue of liver, pancreas, lungs and kidneys [53]
22q11Uncertain (TBX1)DiGeorge or Velocardiofacial syndrome (heart defects, hypocalcemia, immunodeficiency, typical facial malformations, cognitive and behavioral disorders) Type I + II[25,26,27,33,54,55,56,57]
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Triantafyllidi, V.E.; Mavrogianni, D.; Kalampalikis, A.; Litos, M.; Roidi, S.; Michala, L. Identification of Genetic Causes in Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome: A Systematic Review of the Literature. Children 2022, 9, 961. https://doi.org/10.3390/children9070961

AMA Style

Triantafyllidi VE, Mavrogianni D, Kalampalikis A, Litos M, Roidi S, Michala L. Identification of Genetic Causes in Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome: A Systematic Review of the Literature. Children. 2022; 9(7):961. https://doi.org/10.3390/children9070961

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Triantafyllidi, Varvara Ermioni, Despoina Mavrogianni, Andreas Kalampalikis, Michael Litos, Stella Roidi, and Lina Michala. 2022. "Identification of Genetic Causes in Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome: A Systematic Review of the Literature" Children 9, no. 7: 961. https://doi.org/10.3390/children9070961

APA Style

Triantafyllidi, V. E., Mavrogianni, D., Kalampalikis, A., Litos, M., Roidi, S., & Michala, L. (2022). Identification of Genetic Causes in Mayer-Rokitansky-Küster-Hauser (MRKH) Syndrome: A Systematic Review of the Literature. Children, 9(7), 961. https://doi.org/10.3390/children9070961

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