IQUB mutation induces radial spoke 1 deficiency causing asthenozoospermia with normal sperm morphology in humans and mice
Abstract Background Asthenozoospermia (ASZ) accounts for about 20-40% of male infertility, and genetic factors, contributing to 30-40% of the causes of ASZ, still need further exploration. Radial spokes (RSs), a T-shaped macromolecular complex, connect the peripheral doublet microtubules (DMTs) to a...
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BMC
2025-01-01
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| Series: | Cell Communication and Signaling |
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| Online Access: | https://doi.org/10.1186/s12964-025-02043-z |
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| author | Tingwenyi Hu Xiangrong Tang Tiechao Ruan Shunhua Long Guicen Liu Jing Ma Xueqi Li Ruoxuan Zhang Guoning Huang Ying Shen Tingting Lin |
| author_facet | Tingwenyi Hu Xiangrong Tang Tiechao Ruan Shunhua Long Guicen Liu Jing Ma Xueqi Li Ruoxuan Zhang Guoning Huang Ying Shen Tingting Lin |
| author_sort | Tingwenyi Hu |
| collection | DOAJ |
| description | Abstract Background Asthenozoospermia (ASZ) accounts for about 20-40% of male infertility, and genetic factors, contributing to 30-40% of the causes of ASZ, still need further exploration. Radial spokes (RSs), a T-shaped macromolecular complex, connect the peripheral doublet microtubules (DMTs) to a central pair (CP), forming a CP-RS-DMT structure to regulate the beat frequency and amplitude of sperm flagella. To date, many components of RSs and their functions in human sperm flagella remain unclear. Methods We recruited a cohort of 323 infertile males with ASZ between August 2019 and June 2024. Genetic mutations were identified by whole-exome sequencing. Computer-aided sperm analysis, Papanicolaou staining, and electron microscopy were applied to evaluate the motility, morphology, and ultrastructure of spermatozoa, respectively. Protein mass spectrometry, western blotting, and bioinformatic analyses were performed to identify critical components of mammalian RS1 to model its structure and explore the pathological mechanism of IQUB deficiency. Intracytoplasmic sperm injection (ICSI) was applied for the patient and Iqub −/− mice. Results We identified a novel homozygous IQUB mutation [c.842del (p.L281Pfs*28)] in an ASZ male with normal sperm morphology (ANM), which resulted in the complete loss of IQUB in sperm flagella. Deficiency of RS1, but not RS2 or RS3, was observed in both IQUB 842del patient and Iqub −/− mice, and resulted in the reduction of sperm kinetic parameters, indicating the critical role of IQUB in regulating mammalian RS1 assembly and sperm flagellar beat. More importantly, we identified twelve critical components of RS1 in humans and mice, among which RSPH3, RSPH6A, RSPH9 and DYDC1 constituting the head, DYDC1, NME5, DNAJB13 and PPIL6 assembling into the head-neck complex, AK8, ROPN1L, RSPH14, DYNLL1, and IQUB forming the stalk of RS1. Along with the RS1 defect, the IQUB deficiency caused significant down-regulation of the inner dynein arms of DNAH7 and DNAH12, highlighting their nearby location with RS1. Finally, ICSI can effectively resolve the male infertility caused by IQUB genetic defects. Conclusions We demonstrate that IQUB may serve as an adapter for sperm flagellar RS1 in both humans and mice and consolidated the causal relationship between IQUB genetic mutations and ANM, further enriching the genetic spectrum of male infertility. |
| format | Article |
| id | doaj-art-638693fd16df4849a131bf9375145651 |
| institution | Kabale University |
| issn | 1478-811X |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-638693fd16df4849a131bf93751456512025-01-26T12:44:51ZengBMCCell Communication and Signaling1478-811X2025-01-0123111610.1186/s12964-025-02043-zIQUB mutation induces radial spoke 1 deficiency causing asthenozoospermia with normal sperm morphology in humans and miceTingwenyi Hu0Xiangrong Tang1Tiechao Ruan2Shunhua Long3Guicen Liu4Jing Ma5Xueqi Li6Ruoxuan Zhang7Guoning Huang8Ying Shen9Tingting Lin10Chongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical UniversityChongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical UniversityDepartment of Obstetrics/Gynecology, Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan UniversityChongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical UniversityChongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical UniversityChongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical UniversityChongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical UniversityChongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical UniversityChongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical UniversityDepartment of Obstetrics/Gynecology, Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan UniversityChongqing Key Laboratory of Human Embryo Engineering and Precision Medicine, Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical UniversityAbstract Background Asthenozoospermia (ASZ) accounts for about 20-40% of male infertility, and genetic factors, contributing to 30-40% of the causes of ASZ, still need further exploration. Radial spokes (RSs), a T-shaped macromolecular complex, connect the peripheral doublet microtubules (DMTs) to a central pair (CP), forming a CP-RS-DMT structure to regulate the beat frequency and amplitude of sperm flagella. To date, many components of RSs and their functions in human sperm flagella remain unclear. Methods We recruited a cohort of 323 infertile males with ASZ between August 2019 and June 2024. Genetic mutations were identified by whole-exome sequencing. Computer-aided sperm analysis, Papanicolaou staining, and electron microscopy were applied to evaluate the motility, morphology, and ultrastructure of spermatozoa, respectively. Protein mass spectrometry, western blotting, and bioinformatic analyses were performed to identify critical components of mammalian RS1 to model its structure and explore the pathological mechanism of IQUB deficiency. Intracytoplasmic sperm injection (ICSI) was applied for the patient and Iqub −/− mice. Results We identified a novel homozygous IQUB mutation [c.842del (p.L281Pfs*28)] in an ASZ male with normal sperm morphology (ANM), which resulted in the complete loss of IQUB in sperm flagella. Deficiency of RS1, but not RS2 or RS3, was observed in both IQUB 842del patient and Iqub −/− mice, and resulted in the reduction of sperm kinetic parameters, indicating the critical role of IQUB in regulating mammalian RS1 assembly and sperm flagellar beat. More importantly, we identified twelve critical components of RS1 in humans and mice, among which RSPH3, RSPH6A, RSPH9 and DYDC1 constituting the head, DYDC1, NME5, DNAJB13 and PPIL6 assembling into the head-neck complex, AK8, ROPN1L, RSPH14, DYNLL1, and IQUB forming the stalk of RS1. Along with the RS1 defect, the IQUB deficiency caused significant down-regulation of the inner dynein arms of DNAH7 and DNAH12, highlighting their nearby location with RS1. Finally, ICSI can effectively resolve the male infertility caused by IQUB genetic defects. Conclusions We demonstrate that IQUB may serve as an adapter for sperm flagellar RS1 in both humans and mice and consolidated the causal relationship between IQUB genetic mutations and ANM, further enriching the genetic spectrum of male infertility.https://doi.org/10.1186/s12964-025-02043-zMale infertilityAsthenozoospermiaIQUBRadial spokeAssisted reproductive technology |
| spellingShingle | Tingwenyi Hu Xiangrong Tang Tiechao Ruan Shunhua Long Guicen Liu Jing Ma Xueqi Li Ruoxuan Zhang Guoning Huang Ying Shen Tingting Lin IQUB mutation induces radial spoke 1 deficiency causing asthenozoospermia with normal sperm morphology in humans and mice Cell Communication and Signaling Male infertility Asthenozoospermia IQUB Radial spoke Assisted reproductive technology |
| title | IQUB mutation induces radial spoke 1 deficiency causing asthenozoospermia with normal sperm morphology in humans and mice |
| title_full | IQUB mutation induces radial spoke 1 deficiency causing asthenozoospermia with normal sperm morphology in humans and mice |
| title_fullStr | IQUB mutation induces radial spoke 1 deficiency causing asthenozoospermia with normal sperm morphology in humans and mice |
| title_full_unstemmed | IQUB mutation induces radial spoke 1 deficiency causing asthenozoospermia with normal sperm morphology in humans and mice |
| title_short | IQUB mutation induces radial spoke 1 deficiency causing asthenozoospermia with normal sperm morphology in humans and mice |
| title_sort | iqub mutation induces radial spoke 1 deficiency causing asthenozoospermia with normal sperm morphology in humans and mice |
| topic | Male infertility Asthenozoospermia IQUB Radial spoke Assisted reproductive technology |
| url | https://doi.org/10.1186/s12964-025-02043-z |
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