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Li S, He J, Chu L, Ren S, He W, Ma X, Wang Y, Zhang M, Kong L, Liang B, Li Q. F8 gene inversion and duplication cause no obvious hemophilia A phenotype. Front Genet 2023; 14:1098795. [PMID: 36845383 PMCID: PMC9947239 DOI: 10.3389/fgene.2023.1098795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 01/23/2023] [Indexed: 02/11/2023] Open
Abstract
Hemophilia A (HA, OMIM#306700) is an X-linked recessive bleeding disorder caused by the defects in the F8 gene, which encodes coagulation factor VIII (FVIII). Intron 22 inversion (Inv22) is found in about 45% of patients with severe hemophilia A. Here, we reported a male without obvious hemophilia A phenotype but bearing an inherited segmental variant duplication encompassing F8 as well as Inv22. The duplication was approximately 0.16 Mb and involved from exon 1 to intron 22 of F8. This partial duplication and Inv22 in F8 was first found in the abortion tissue of his older sister with recurrent miscarriage. The genetic testing of his family revealed that his phenotypically normal older sister and mother also had this heterozygous Inv22 and a 0.16 Mb partial duplication of F8, while his father was genotypically normal. The integrity of the F8 gene transcript was verified by sequencing of the adjacent exons at the inversion breakpoint, which explained why this male had no phenotype for hemophilia A. Interestingly, although he had no significant hemophilia A phenotype, the expression of C1QA in his mother, sister, and the male subject was only about half of that in his father and normal population. Our report broadens the mutation spectrum of F8 inversion and duplication and its pathogenicity in hemophilia A.
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Affiliation(s)
- Shaoying Li
- Department of Obstetrics and Gynecology, Experimental Department of Institute of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | - Jianchun He
- Department of Obstetrics and Gynecology, Experimental Department of Institute of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | - Liming Chu
- Basecare Medical Device Co., Ltd, Suzhou, China
| | - Shuai Ren
- Basecare Medical Device Co., Ltd, Suzhou, China
| | - Wenzhi He
- Department of Obstetrics and Gynecology, Experimental Department of Institute of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | - Xiaoyan Ma
- Department of Obstetrics and Gynecology, Experimental Department of Institute of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | - Yanchao Wang
- Department of Obstetrics and Gynecology, Experimental Department of Institute of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | - Mincong Zhang
- Department of Obstetrics and Gynecology, Experimental Department of Institute of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China
| | | | - Bo Liang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China,*Correspondence: Qing Li, ; Bo Liang,
| | - Qing Li
- Department of Obstetrics and Gynecology, Experimental Department of Institute of Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, China,*Correspondence: Qing Li, ; Bo Liang,
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Latour-Álvarez I, Torrelo A. Cutaneous clues to diagnose autoinflammatory diseases. GIORN ITAL DERMAT V 2020; 155:551-566. [PMID: 33070568 DOI: 10.23736/s0392-0488.20.06652-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Systemic autoinflammatory diseases (AIDs) are a group of disorders characterized by recurrent episodes of systemic inflammation. Suspecting the diagnosis can be difficult and many of the clinical manifestations are common to different diseases. Although most of the cutaneous manifestations are non-specific, it is important to know them because sometimes they can lead to the diagnosis. The purpose of this review was to synthesize the main cutaneous lesions of autoinflammatory diseases to aid in their diagnosis.
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Affiliation(s)
| | - Antonio Torrelo
- Department of Dermatology, Niño Jesús University Hospital, Madrid, Spain -
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Jlajla H, Sellami MK, Sfar I, Laadhar L, Zerzeri Y, Abdelmoula MS, Gorgi Y, Dridi MF, Makni S. New C1q mutation in a Tunisian family. Immunobiology 2014; 219:241-6. [DOI: 10.1016/j.imbio.2013.10.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 10/22/2013] [Accepted: 10/28/2013] [Indexed: 10/26/2022]
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Higuchi Y, Shimizu J, Hatanaka M, Kitano E, Kitamura H, Takada H, Ishimura M, Hara T, Ohara O, Asagoe K, Kubo T. The identification of a novel splicing mutation in C1qB in a Japanese family with C1q deficiency: a case report. Pediatr Rheumatol Online J 2013; 11:41. [PMID: 24160257 PMCID: PMC3874733 DOI: 10.1186/1546-0096-11-41] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 10/25/2013] [Indexed: 01/20/2023] Open
Abstract
C1q deficiency is a rare disease that is associated with a high probability of developing systemic lupus erythematosus. We report a 4-year-old Japanese girl who presented with fever, facial erythema, joint pain, and oral ulceration. Complement deficiencies were suspected because of her persistent hypocomplementemia and normal levels of the complement proteins C3 and C4. We identified a novel homozygous splicing mutation in the C1qB gene, c.187 + 1G > T, which is the first mutation to be confirmed in a Japanese individual. Because treatment with steroids and immunosuppressive drugs was not effective, we commenced use of fresh frozen plasma to provide C1q supplements. Currently, the patient remains almost asymptomatic, and we are attempting to control the drug dosage and administration intervals of fresh frozen plasma.
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Affiliation(s)
- Yousuke Higuchi
- Department of Pediatrics, National Hospital Organization Okayama Medical Center, 1711-1 Tamasu, Kita-ku, Okayama 701-1192, Japan
| | - Junya Shimizu
- Department of Pediatrics, National Hospital Organization Okayama Medical Center, 1711-1 Tamasu, Kita-ku, Okayama 701-1192, Japan.
| | - Michiyo Hatanaka
- Department of Medical Technology Faculty of Health Sciences, Kobe Tokiwa University, 2-6-2 Ohtanicho, Nagata-ku, Kobe 653-0838, Japan
| | - Etsuko Kitano
- Department of Medical Technology Faculty of Health Sciences, Kobe Tokiwa University, 2-6-2 Ohtanicho, Nagata-ku, Kobe 653-0838, Japan
| | - Hajime Kitamura
- Department of Medical Technology Faculty of Health Sciences, Kobe Tokiwa University, 2-6-2 Ohtanicho, Nagata-ku, Kobe 653-0838, Japan
| | - Hidetoshi Takada
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higasi-ku, Fukuoka 812-8582, Japan
| | - Masataka Ishimura
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higasi-ku, Fukuoka 812-8582, Japan
| | - Toshiro Hara
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higasi-ku, Fukuoka 812-8582, Japan
| | - Osamu Ohara
- Department of Human Genome Technology, Kazusa DNA Research Institute, 2-6-7 Kazusakamatari, Chiba 292-0818, Japan
| | - Kenji Asagoe
- Department of Dermatology, National Hospital Organization Okayama Medical Center, 1711-1 Tamasu, Kita-ku, Okayama 701-1192, Japan
| | - Toshihide Kubo
- Department of Pediatrics, National Hospital Organization Okayama Medical Center, 1711-1 Tamasu, Kita-ku, Okayama 701-1192, Japan
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Ornstein BW, Atkinson JP, Densen P. The complement system in pediatric systemic lupus erythematosus, atypical hemolytic uremic syndrome, and complocentric membranoglomerulopathies. Curr Opin Rheumatol 2013; 24:522-9. [PMID: 22810363 DOI: 10.1097/bor.0b013e328356896b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW This review summarizes the recent advances in complement biology and the evolving understanding of these contributions to the pathophysiology and treatment of predominantly pediatric disease syndromes. RECENT FINDINGS Identification of lupus patients with complete deficiencies of one of the plasma complement proteins enabled the field to move beyond the notion of complement as a laboratory curiosity. Clinical investigation of the manifestations observed in deficient patients has further defined the biology of the system in normal individuals. Definition of the assembly of the C3 convertases, particularly that of the alternative pathway and its regulation, has led to the appreciation that the complement system includes membrane inhibitors that are every bit as important as those in plasma. The exploration of disease states in which significant complement deposition occurs has moved the field away from consideration of this finding as a bystander effect. Dissection of these syndromes has led to the unanticipated finding of a central role for function-altering mutations in the complement proteins that form or regulate the alternative pathway C3 convertase and has opened the door to new therapeutic approaches. The disease states discussed in the review - pediatric systemic lupus erythematosus, atypical hemolytic uremic syndrome, and the complocentric membranoglomerulopathies - illustrate this evolutionary history of complement biology. SUMMARY This review emphasizes that both the lack of classical pathway complement activation and excessive activation of the alternative pathway contribute to distinct disease pathogenesis, and emphasizes the critical importance of homeostatic regulation, in both plasma and in tissues, of the system as a whole.
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Affiliation(s)
- Bradley W Ornstein
- Division of Infectious Diseases and Rheumatology, Department of Pediatrics, Washington University School of Medicine, St Louis, Missouri, USA
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