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Spontaneous chromosomal instability in peripheral blood lymphocytes from two molecularly confirmed Italian patients with Hereditary Fibrosis Poikiloderma: insights into cancer predisposition.
Genetics and Molecular Biology ( IF 2.1 ) Pub Date : 2021-08-06 , DOI: 10.1590/1678-4685-gmb-2020-0332
Gaia Roversi 1, 2 , Elisa Adele Colombo 2 , Ivana Magnani 2 , Cristina Gervasini 2 , Giuseppe Maggiore 3 , Mauro Paradisi 4 , Lidia Larizza 5
Affiliation  

Two Italian patients with the initial clinical diagnosis of Rothmund-Thomson syndrome were negative for RECQL4 mutations but showed in peripheral blood cells a spontaneous chromosomal instability significantly higher than controls. Revisiting after time their clinical phenotype, the suggestive matching with the autosomal dominant syndrome Poikiloderma, Hereditary Fibrosing with Tendon Contracture, Myopathy and Pulmonary fibrosis (POIKTMP) was confirmed by identification of the c.1879A>G (p.Arg627Gly) alteration in FAM111B. We compare the overall clinical signs of our patients with those of reported carriers of the same mutation and present the up-to-date mutational repertoire of FAM111B and the related phenotypic spectrum. Our snapshot highlights the age-dependent clinical expressivity of POIKTMP and the need to follow-up patients to monitor the multi-tissue impairment caused by FAM111B alterations. We link our chromosomal instability data to the role of FAM111B in cancer predisposition, pointed out by its implication in DNA-repair pathways and the outcome of pancreatic cancer in 2 out of 17 adult POIKTMP patients. The chromosomal instability herein highlighted well connects POIKTMP to cancer-predisposing syndromes, such as Rothmund-Thomson which represents the first hereditary poikiloderma entering in differential diagnosis with POIKTMP.

中文翻译:

来自两名经分子证实的意大利遗传性纤维化皮肤异色症患者的外周血淋巴细胞的自发染色体不稳定性:对癌症易感性的洞察。

两名最初临床诊断为 Rothmund-Thomson 综合征的意大利患者的 RECQL4 突变为阴性,但在外周血细胞中表现出明显高于对照组的自发染色体不稳定性。一段时间后重新审视他们的临床表型,通过鉴定 FAM111B 中的 c.1879A>G (p.Arg627Gly) 改变证实了与常染色体显性遗传综合征皮肤异色症、遗传性纤维化伴肌腱挛缩、肌病和肺纤维化 (POIKTMP) 的暗示匹配。我们将我们患者的总体临床症状与报告的相同突变携带者的临床症状进行比较,并提供最新的 FAM111B 突变库和相关表型谱。我们的快照强调了 POIKTMP 与年龄相关的临床表现,以及需要对患者进行随访以监测由 FAM111B 改变引起的多组织损伤。我们将我们的染色体不稳定性数据与 FAM111B 在癌症易感性中的作用联系起来,通过其在 DNA 修复途径和 17 名成人 POIKTMP 患者中的 2 名胰腺癌结果中的含义指出。这里强调的染色体不稳定性很好地将 POIKTMP 与癌症易感综合征联系起来,例如 Rothmund-Thomson,它代表了第一个与 POIKTMP 进行鉴别诊断的遗传性异色病。17 名成人 POIKTMP 患者中有 2 名对 DNA 修复途径和胰腺癌的结果有影响。这里强调的染色体不稳定性很好地将 POIKTMP 与癌症易感综合征联系起来,例如 Rothmund-Thomson,它代表了第一个与 POIKTMP 进行鉴别诊断的遗传性异色病。17 名成人 POIKTMP 患者中有 2 名对 DNA 修复途径和胰腺癌的结果有影响。这里强调的染色体不稳定性很好地将 POIKTMP 与癌症易感综合征联系起来,例如 Rothmund-Thomson,它代表了第一个与 POIKTMP 进行鉴别诊断的遗传性异色病。
更新日期:2021-08-06
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