LUCIANA RIBEIRO MONTENEGRO
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Clínica Médica, Faculdade de Medicina
LIM/42 - Laboratório de Hormônios e Genética Molecular, Hospital das Clínicas, Faculdade de Medicina
LIM/42 - Laboratório de Hormônios e Genética Molecular, Hospital das Clínicas, Faculdade de Medicina
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article 6 Citação(ões) na Scopus Mutations in insulin-like growth factor receptor 1 gene (IGF1R) resulting in intrauterine and postnatal growth retardation(2011) LEAL, Andrea de Castro; CANTON, Ana Pinheiro Machado; MONTENEGRO, Luciana Ribeiro; COUTINHO, Debora Cabral; ARNHOLD, Ivo Jorge Prado; JORGE, Alexander Augusto de LimaApproximately 10% of children born small-for-gestational age (SGA) do not show spontaneous growth catch-up. The causes of this deficit in prenatal growth and its maintenance after birth are not completely known, in most cases. Over the past eight years, several heterozygous inactivating mutations and deletions in IGF1R gene have been reported, indicating the role of defects in the IGFs/IGF1R axis as a cause of growth deficit. It has been hypothesized that at least 2.5% of children born SGA may have IGF1R gene defects. The clinical presentation of these patients is highly variable in the severity of growth retardation and hormonal parameters. In the most evident cases, patients have microcephaly, mild cognitive impairment and high levels of IGF-1, associated with short stature of prenatal onset. This review will describe the clinical, molecular and treatment of short stature with hrGH of children with mutations in the IGF1R gene. Arq Bras Endocrinol Metab. 2011;55(8):541-9- Genotype-Phenotype Correlations in Central Precocious Puberty Caused by MKRN3 Mutations (vol 106, pg 1041, 2021)(2021) SERAPHIM, C. E.; CANTON, A. P. M.; MONTENEGRO, L.; PIOVESAN, M. R.; MACEDO, D. B.; CUNHA, M.; GUIMARAES, A.; RAMOS, C. O.; BENEDETTI, A. F. F.; LEAL, De Castro A.; GAGLIARDI, P. C.; ANTONINI, S. R.; GRYNGARTEN, M.; ARCARI, A. J.; ABREU, A. P.; KAISER, U. B.; SORIANO-GUILLEN, L.; ESCRIBANO-MUNOZ, A.; CORRIPIO, R.; I, J. Labarta; TRAVIESO-SUAREZ, L.; V, N. Ortiz-Cabrera; ARGENTE, J.; MENDONCA, B. B.; BRITO, V. N.; LATRONICO, A. C.
conferenceObject X-Linked Central Precocious Puberty Associated with MECP2 defects(2022) CANTON, Ana; TINANO, Flavia; GUASTI, Leonardo; MONTENEGRO, Luciana; RYAN, Fiona; SHEARS, Deborah; MELO, Maria Edna; GOMES, Larissa; PIANA, Mariana; BRAUNER, Raja; ESPINO, Rafael; ESCRIBANO-MUNOZ, Arancha; PAGANONI, Alyssa; KORBONITS, Marta; SERAPHIM, Carlos Eduardo; FARIA, Aline; COSTA, Silvia; KREPISCHI, Ana Cristina; JORGE, Alexander; DAVID, Alessia; ARGENTE, Jesus; MENDONCA, Berenice; BRITO, Vinicius; HOWARD, Sasha; LATRONICO, Ana ClaudiaconferenceObject Clinical and Genetic Features of Central Precocious Puberty Associated with Complex Phenotypes(2018) CANTON, Ana; BRITO, Vinicius; MONTENEGRO, Luciana; RAMOS, Carolina; MACEDO, Delanie; BESSA, Danielle; CUNHA, Marina; JORGE, Alexander; MENDONCA, Berenice; LATRONICO, Ana Claudia- DLK1 Is a Novel Link Between Reproduction and Metabolism(2019) GAMES, Larissa G.; CUNHA-SILVA, Marina; CRESPO, Raiane P.; RAMOS, Carolina O.; MONTENEGRO, Luciana R.; CANTON, Ana; LEES, Melissa; SPOUDEAS, Helen; DAUBER, Andrew; MACEDO, Delanie B.; BESSA, Danielle S.; MACIEL, Gustavo A.; BARACAT, Edmund C.; JORGE, Alexander A. L.; MENDONCA, Berenice B.; BRITO, Vinicius N.; LATRONICO, Ana ClaudiaBackground: Delta-like homolog 1 (DLK1), also called preadipocyte factor 1, prevents adipocyte differentiation and has been considered a molecular gatekeeper of adipogenesis. A DLK1 complex genomic defect was identified in five women from a single family with central precocious puberty (CPP) and increased body fat percentage. Methods: We studied 60 female patients with a diagnosis of CPP or history of precocious menarche. Thirty-one of them reported a family history of precocious puberty. DLK1 DNA sequencing was performed in all patients. Serum DLK1 concentrations were measured using an ELISA assay in selected cases. Metabolic and reproductive profiles of adult women with CPP caused by DLK1 defects were compared with those of 20 women with idiopathic CPP. Results: We identified three frameshift mutations of DLK1 (p.Gly199Alafs*11, p.Va1271Cysfs*14, and p.Pro160Leufs*50) in five women from three families with CPP. Segregation analysis was consistent with the maternal imprinting of DLK1. Serum DLK1 concentrations were undetectable in three affected women. Metabolic abnormalities, such as overweight/obesity, early-onset glucose intolerance/type 2 diabetes mellitus, and hyperlipidemia, were more prevalent in women with the DLK1 mutation than in the idiopathic CPP group. Notably, the human metabolic alterations were similar to the previously described dlk1-null mice phenotype. Two sisters who carried the p.Gly199Alafs*11 mutation also exhibited polycystic ovary syndrome and infertility. Conclusions: Loss-of-function mutations of DLK1 are a definitive cause of familial CPP. The high prevalence of metabolic alterations in adult women who experienced CPP due to DLK1 defects suggests that this antiadipogenic factor represents a link between reproduction and metabolism.
conferenceObject Update on the etiological diagnosis of central precocious puberty in both sexes(2023) CANTON, Ana; LATRONICO, Ana Claudia; MONTENEGRO, Luciana; PIOVESAN, Maiara; SERAPHIM, Carlos; TINANO, Flavia; FARIA, Aline; MENDONCA, Berenice; BRITO, Vinicius- Clinical and Genetic Characterization of Familial Central Precocious Puberty(2023) TINANO, Flavia Rezende; CANTON, Ana Pinheiro Machado; MONTENEGRO, Luciana R.; LEAL, Andrea de Castro; FARIA, Aline G.; SERAPHIM, Carlos E.; BRAUNER, Raja; JORGE, Alexander A.; MENDONCA, Berenice B.; ARGENTE, Jesus; BRITO, Vinicius N.; LATRONICO, Ana ClaudiaContext Central precocious puberty (CPP) can have a familial form in approximately one-quarter of the children. The recognition of this inherited condition increased after the identification of autosomal dominant CPP with paternal transmission caused by mutations in the MKRN3 and DLK1 genes. Objective We aimed to characterize the inheritance and estimate the prevalence of familial CPP in a large multiethnic cohort; to compare clinical and hormonal features, as well as treatment response to GnRH analogs (GnRHa), in children with distinct modes of transmission; and to investigate the genetic basis of familial CPP. Methods We retrospectively studied 586 children with a diagnosis of CPP. Patients with familial CPP (n = 276) were selected for clinical and genetic analysis. Data from previous studies were grouped, encompassing sequencing of MKRN3 and DLK1 genes in 204 patients. Large-scale parallel sequencing was performed in 48 individuals from 34 families. Results The prevalence of familial CPP was estimated at 22%, with a similar frequency of maternal and paternal transmission. Pedigree analyses of families with maternal transmission suggested an autosomal dominant inheritance. Clinical and hormonal features, as well as treatment response to GnRHa, were similar among patients with different forms of transmission of familial CPP. MKRN3 loss-of-function mutations were the most prevalent cause of familial CPP, followed by DLK1 loss-of-function mutations, affecting, respectively, 22% and 4% of the studied families; both affected exclusively families with paternal transmission. Rare variants of uncertain significance were identified in CPP families with maternal transmission. Conclusion We demonstrated a similar prevalence of familial CPP with maternal and paternal transmission. MKRN3 and DLK1 loss-of-function mutations were the major causes of familial CPP with paternal transmission.
conferenceObject Investigation of imprinting alterations in MKRN3 and DLK1 in a cohort of girls with central precocious puberty through specific DNA methylation analysis(2019) CANTON, Ana; STEUNOU, Virginie; BRITO, Vinicius; SOBRIER, Marie Laure; MONTENEGRO, Luciana; BESSA, Danielle; MENDONCA, Berenice B.; NETCHINE, Irene; LATRONICO, Ana Claudia- Familial central precocious puberty due to DLK1 deficiency: novel genetic findings and relevance of serum DLK1 levels(2023) MONTENEGRO, Luciana; SERAPHIM, Carlos; TINANO, Flavia; PIOVESAN, Maiara; CANTON, Ana P. M.; MCELREAVEY, Ken; BRABANT, Severine; BORIS, Natalia P.; MAGNUSON, Melissa; CARROLL, Rona S.; KAISER, Ursula B.; ARGENTE, Jesus; BARRIOS, Vicente; BRITO, Vinicius N.; BRAUNER, Raja; LATRONICO, Ana ClaudiaBackground: Several rare loss-of-function mutations of delta-like noncanonical notch ligand 1 (DLK1) have been described in non-syndromic children with familial central precocious puberty (CPP). Objective: We investigated genetic abnormalities of DLK1 gene in a French cohort of children with idiopathic CPP. Additionally, we explored the pattern of DLK1 serum levels in patients with CPP and in healthy children at puberty, as well as in wild-type female mice. Patients and Methods: Genomic DNA was obtained from 121 French index cases with CPP. Automated sequencing of the coding region of the DLK1 gene was performed in all cases. Serum DLK1 levels were measured by enzyme linked immunosorbent assay (ELISA) in 209 individuals, including 191 with normal pubertal development and in female mice during postnatal pubertal maturation. Results: We identified 2 rare pathogenic DLK1 allelic variants: A stop gain variant (c.372C>A; p.Cys124X) and a start loss variant (c.2T>G; p.Met1?, or p.0) in 2 French girls with CPP. Mean serum DLK1 levels were similar between healthy children and idiopathic CPP children. In healthy individuals, DLK1 levels correlated with pubertal stage: In girls, DLK1 decreased between Tanner stages III and V, whereas in boys, DLK1 decreased between Tanner stages II and V (P =.008 and.016, respectively). Serum levels of Dlk1 also decreased in wild-type female mice. Conclusions: Novel loss-of-function mutations in DLK1 gene were identified in 2 French girls with CPP. Additionally, we demonstrated a pattern of dynamic changes in circulating DLK1 serum levels in humans and mice during pubertal stages, reinforcing the role of this factor in pubertal timing.
- Genotype-Phenotype Correlations in Central Precocious Puberty Caused by MKRN3 Mutations(2021) SERAPHIM, Carlos Eduardo; CANTON, Ana Pinheiro Machado; MONTENEGRO, Luciana; PIOVESAN, Maiara Ribeiro; MACEDO, Delanie B.; CUNHA, Marina; GUIMARAES, Aline; RAMOS, Carolina Oliveira; BENEDETTI, Anna Flavia Figueiredo; LEAL, Andrea de Castro; GAGLIARDI, Priscila C.; ANTONINI, Sonir R.; GRYNGARTEN, Mirta; ARCARI, Andrea J.; ABREU, Ana Paula; KAISER, Ursula B.; SORIANO-GUILLEN, Leandro; ESCRIBANO-MUNOZ, Arancha; CORRIPIO, Raquel; I, Jose Labarta; TRAVIESO-SUAREZ, Lourdes; ORTIZ-CABRERA, Nelmar Valentina; ARGENTE, Jesus; MENDONCA, Berenice B.; BRITO, Vinicius N.; LATRONICO, Ana ClaudiaContext: Loss-of-function mutations of makorin RING finger protein 3 (MKRN3) are the most common monogenic cause of familial central precocious puberty (CPP). Objective: To describe the clinical and hormonal features of a large cohort of patients with CPP due to MKRN3 mutations and compare the characteristics of different types of genetic defects. Methods: Multiethnic cohort of 716 patients with familial or idiopathic CPP screened for MKRN3 mutations using Sanger sequencing. A group of 156 Brazilian girls with idiopathic CPP (ICPP) was used as control group. Results: Seventy-one patients (45 girls and 26 boys from 36 families) had 18 different loss-of-function MKRN3 mutations. Eight mutations were classified as severe (70% of patients). Among the 71 patients, first pubertal signs occurred at 6.2 +/- 1.2 years in girls and 7.1 +/- 1.5 years in boys. Girls with MKRN3 mutations had a shorter delay between puberty onset and first evaluation and higher follicle-stimulating hormone levels than ICPP. Patients with severe MKRN3 mutations had a greater bone age advancement than patients with missense mutations (2.3 +/- 1.6 vs 1.6 +/- 1.4 years, P =.048), and had higher basal luteinizing hormone levels (2.2 +/- 1.8 vs 1.1 +/- 1.1 UI/L, P =.018) at the time of presentation. Computational protein modeling revealed that 60% of the missense mutations were predicted to cause protein destabilization. Conclusion: Inherited premature activation of the reproductive axis caused by loss-of-function mutations of MKRN3 is clinically indistinct from ICPP. However, the type of genetic defect may affect bone age maturation and gonadotropin levels.