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Lebedev T, Vagapova E, Spirin P, Rubtsov P, Astashkova O, Mikheeva A, Sorokin M, Vladimirova U, Suntsova M, Konovalov D, Roumiantsev A, Stocking C, Buzdin A, Prassolov V. Growth factor signaling predicts therapy resistance mechanisms and defines neuroblastoma subtypes. Oncogene 2021; 40:6258-6272. [PMID: 34556815 PMCID: PMC8566230 DOI: 10.1038/s41388-021-02018-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 08/25/2021] [Accepted: 09/10/2021] [Indexed: 02/08/2023]
Abstract
Neuroblastoma (NB) has a low frequency of recurrent mutations compared to other cancers, which hinders the development of targeted therapies and novel risk stratification strategies. Multikinase inhibitors have shown potential in treating high-risk NB, but their efficacy is likely impaired by the cancer cells' ability to adapt to these drugs through the employment of alternative signaling pathways. Based on the expression of 48 growth factor-related genes in 1189 NB tumors, we have developed a model for NB patient survival prediction. This model discriminates between stage 4 NB tumors with favorable outcomes (>80% overall survival) and very poor outcomes (<10%) independently from MYCN-amplification status. Using signaling pathway analysis and gene set enrichment methods in 60 NB patients with known therapy response, we identified signaling pathways, including EPO, NGF, and HGF, upregulated in patients with no or partial response. In a therapeutic setting, we showed that among six selected growth factors, EPO, and NGF showed the most pronounced protective effects in vitro against several promising anti-NB multikinase inhibitors: imatinib, dasatinib, crizotinib, cabozantinib, and axitinib. Mechanistically kinase inhibitors potentiated NB cells to stronger ERK activation by EPO and NGF. The protective action of these growth factors strongly correlated with ERK activation and was ERK-dependent. ERK inhibitors combined with anticancer drugs, especially with dasatinib, showed a synergistic effect on NB cell death. Consideration of growth factor signaling activity benefits NB outcome prediction and tailoring therapy regimens to treat NB.
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Affiliation(s)
- Timofey Lebedev
- Department of Cancer Cell Biology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.
| | - Elmira Vagapova
- Department of Cancer Cell Biology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Pavel Spirin
- Department of Cancer Cell Biology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Petr Rubtsov
- Department of Cancer Cell Biology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Olga Astashkova
- Department of Cancer Cell Biology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
- Moscow Institute of Physics and Technology (National Research University), Moscow Region, Russia
| | - Alesya Mikheeva
- Department of Cancer Cell Biology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
- Moscow Institute of Physics and Technology (National Research University), Moscow Region, Russia
| | - Maxim Sorokin
- Group for Genomic Regulation of Cell Signaling Systems, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Moscow, Russia
- Department of Bioinformatics and Molecular Networks, OmicsWay Corporation, Walnut, CA, USA
- Institute of Personalized Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Uliana Vladimirova
- Institute of Personalized Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Maria Suntsova
- Institute of Personalized Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Dmitry Konovalov
- D. Rogachyov Federal Research Center of Pediatric Hematology, Oncology and Immunology, Moscow, Russia
| | - Alexander Roumiantsev
- D. Rogachyov Federal Research Center of Pediatric Hematology, Oncology and Immunology, Moscow, Russia
| | - Carol Stocking
- Research Department Cell and Gene Therapy, Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
- Heinrich-Pette-Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Anton Buzdin
- Moscow Institute of Physics and Technology (National Research University), Moscow Region, Russia
- Group for Genomic Regulation of Cell Signaling Systems, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Moscow, Russia
- Department of Bioinformatics and Molecular Networks, OmicsWay Corporation, Walnut, CA, USA
- Institute of Personalized Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Vladimir Prassolov
- Department of Cancer Cell Biology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
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Vagapova E, Lebedev T, Gavrilova V, Spirin P, Rubtsov P, Leonova O, Popenko V, Prassolov V. GATA1, GATA2, and TAL1 Regulate the Expression of Neurotrophic Receptor Tyrosine Kinase in Leukemia Cells. FASEB J 2021. [DOI: 10.1096/fasebj.2021.35.s1.03640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elmira Vagapova
- Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow
- Moscow Institute of Physics and Technology (National Research University)Dolgoprudny, Moscow Region
| | - Timofey Lebedev
- Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow
| | | | - Pavel Spirin
- Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow
| | - Petr Rubtsov
- Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow
| | - Olga Leonova
- Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow
| | - Vladimir Popenko
- Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow
| | - Vladimir Prassolov
- Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow
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Rubtsov P, Nizhnik A, Dedov I, Kalinchenko N, Petrov V, Orekhova A, Spirin P, Prassolov V, Tiulpakov A. Partial deficiency of 17α-hydroxylase/17,20-lyase caused by a novel missense mutation in the canonical cytochrome heme-interacting motif. Eur J Endocrinol 2015; 172:K19-25. [PMID: 25650406 DOI: 10.1530/eje-14-0834] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Deficiency of 17α-hydroxylase/17,20-lyase is a rare cause of 46,XY disordered sex development. OBJECTIVE We characterize in vitro and in vivo effects of two novel CYP17A1 gene mutations identified in a patient with a mild phenotype of CYP17A1 deficiency. SUBJECTS AND METHODS A 46,XY patient presented with ambiguous genitalia. CYP17A1 deficiency was suspected at 2 months on the basis of steroid analysis performed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Mutational analysis of the CYP17A1 gene was performed by PCR and Sanger sequencing. To characterize the effect of CYP17A1 mutation on 17α-hydroxylase and 17,20-lyase activities in vitro, HEK293 cells were transiently transfected with CYP17A1 expression plasmids, incubated with progesterone or 17-OH-pregnenolone and concentrations of 17-OH-progesterone or DHEA were then measured in the cell culture medium by LC-MS/MS. RESULTS Clinical and hormonal findings in the patient were consistent with partial combined deficiency of 17α-hydroxylase/17,20-lyase. The sequencing of the CYP17A1 gene in the patient revealed compound heterozygosity for two novel mutations: c.107delT p.R36fsX107 and p.W121R. After 6-h in vitro culture of transfected HEK293 cells in the presence of 1 μM progesterone, 17α-hydroxylase activity of p.W121R mutant was 60.5±16.3%, while 17,20-lyase activity of mutant measured from the amount of DHEA produced in the presence of 1 μM of 17-OH-pregnenolone was 15.8±2.6% compared with the WT. CONCLUSIONS p.W121R substitution, affecting the first residue in the conserved heme-interacting WXXXR motif of CYP17A1, is associated with partial combined deficiency of 17α-hydroxylase/17,20-lyase.
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Affiliation(s)
- Petr Rubtsov
- Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation
| | - Alexander Nizhnik
- Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation
| | - Ivan Dedov
- Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation
| | - Natalia Kalinchenko
- Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation
| | - Vasily Petrov
- Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation
| | - Anna Orekhova
- Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation
| | - Pavel Spirin
- Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation
| | - Vladimir Prassolov
- Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation
| | - Anatoly Tiulpakov
- Department and Laboratory of Inherited Endocrine DisordersEndocrinology Research Centre, Ulitsa Dmitriya Ulianova, 11, Moscow 117036, Russian FederationEngelhardt Institute of Molecular BiologyMoscow 119991, Russian FederationInstitute of Physics and TechnologyMoscow Region 141700, Russian FederationInstitute of General Pathology and PathophysiologyMoscow 125315, Russian Federation
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Rubtsov P, Karmanov M, Sverdlova P, Spirin P, Tiulpakov A. A novel homozygous mutation in CYP11A1 gene is associated with late-onset adrenal insufficiency and hypospadias in a 46,XY patient. J Clin Endocrinol Metab 2009; 94:936-9. [PMID: 19116240 DOI: 10.1210/jc.2008-1118] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
CONTEXT The first and the rate-limiting step in the biosynthesis of hormones in all steroidogenic tissues, conversion of cholesterol to pregnenolone, is catalyzed by the cholesterol side-change cleavage cytochrome P450 (P450scc) encoded by a single gene, CYP11A1. To date, mutations in CYP11A1 gene have been reported in six patients, all of whom presented with adrenal insufficiency within the first 4 yr of life and severely underandrogenized external genitalia (Prader stages 1-2). OBJECTIVE Our aim was to characterize in vitro and in vivo effects of a novel homozygous CYP11A1 gene mutation identified in a patient with an unusual presentation of P450scc deficiency. METHODS AND PATIENTS A 46,XY patient presented with mid-shaft hypospadias and cryptorchidism at birth and signs of adrenal failure at 9 yr. Mutational analysis of CYP11A1 gene was performed by PCR, followed by direct sequencing. P450scc activity was determined by measuring concentration of pregnenolone synthesized from cholesterol in the medium after a transient transfection of HEK293 cells with P450scc, adrenodoxin, adrenodoxin reductase, and steroidogenic acute regulatory protein expression plasmids. RESULTS The sequencing of CYP11A1 gene in the proband revealed a novel homozygous L222P mutation, whereas both parents were heterozygous carriers for this mutation. In vitro P450scc activity of L222P mutant was approximately 7% compared with the wild type. CONCLUSIONS This case represents the mildest phenotype of P450scc deficiency to be described. The phenotypic presentation was consistent with the partial reduction of P450scc activity of L222P mutant.
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Affiliation(s)
- Petr Rubtsov
- Department of Endocrine Genetics, Endocrinology Research Center, Moscow 117036, Russian Federation
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Inagaki K, Tiulpakov A, Rubtsov P, Sverdlova P, Peterkova V, Yakar S, Terekhov S, LeRoith D. A familial insulin-like growth factor-I receptor mutant leads to short stature: clinical and biochemical characterization. J Clin Endocrinol Metab 2007; 92:1542-8. [PMID: 17264177 DOI: 10.1210/jc.2006-2354] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
CONTEXT IGF-I/IGF-I receptor (IGF-IR) signaling pathways play important roles in longitudinal growth. A novel Arg481Glu (R481Q) mutation in IGF-IR was detected in a family with intrauterine and postnatal growth retardation. OBJECTIVE The objective of the study was to explore the mechanism whereby the R481Q mutation may be causative in growth retardation. PATIENTS A 13-yr-old girl with short stature was studied for functional analysis of the R481Q mutation in the IGF-IR. RESULTS Two members of a family who showed intrauterine and postnatal growth retardation, with increased serum IGF-I levels, demonstrated a substitution of arginine for glutamine at 481 (R481Q) in the IGF-IR. This mutation results in the formation of an altered fibronectin type III domain within the alpha-subunit. NIH-3T3 fibroblasts that overexpress the human wild-type or R481Q mutant IGF-IR demonstrated normal cell surface ligand binding by 125I-IGF-I binding assay. However, the fold increase of IGF-I stimulated tyrosine phosphorylation of the IGF-IR beta-subunit as well as downstream activation of ERK1/2 and Akt was reduced in cells overexpressing the mutant receptor. Additionally, basal and IGF-I-stimulated levels of cell proliferation were also reduced in cells overexpressing the mutant receptor. CONCLUSION Our results demonstrate that NIH-3T3 cells overexpressing a mutant form of the Igf1r gene, in which arginine at 481 is substituted by glutamine, lead to reduced levels of the fold increase of IGF-IR beta-subunit phosphorylation as well as ERK1/2 and Akt phosphorylation and was accompanied by decreased cell proliferation. These results are postulated to be the cause of intrauterine and postnatal growth retardation in the described patients.
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Affiliation(s)
- Kenjiro Inagaki
- Division of Endocrinology, Diabetes, and Bone Diseases, Department of Medicine, The Mount Sinai School of Medicine, New York, New York 10029, USA
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Grischuk Y, Rubtsov P, Riepe FG, Grötzinger J, Beljelarskaia S, Prassolov V, Kalintchenko N, Semitcheva T, Peterkova V, Tiulpakov A, Sippell WG, Krone N. Four novel missense mutations in the CYP21A2 gene detected in Russian patients suffering from the classical form of congenital adrenal hyperplasia: identification, functional characterization, and structural analysis. J Clin Endocrinol Metab 2006; 91:4976-80. [PMID: 16984992 DOI: 10.1210/jc.2006-0777] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
CONTEXT Congenital adrenal hyperplasia is a group of autosomal recessive inherited disorders of steroidogenesis. The most frequent cause is the deficiency of steroid 21-hydroxylase (CYP21) due to mutations in the CYP21A2 gene. OBJECTIVE We analyzed the functional and structural consequences of the four CYP21A2 missense mutations (C169R, G178R, W302R, and R426C) to prove their clinical relevance and study their impact on CYP21 function. RESULTS Analyzing the mutations in vitro revealed an almost absent or negligible CYP21 activity for the conversion of 17-hydroxyprogesterone to 11-deoxycortisol and progesterone to deoxycorticosterone. Protein translation and intracellular localization were not affected by the mutants, as could be demonstrated by Western blotting and immunofluorescence studies. Analysis of these mutants in a three-dimensional model structure of the CYP21 protein explained the observed in vitro effects because all the mutations severely interfere either directly or indirectly with important structures of the 21-hydroxylase protein. CONCLUSION The in vitro expression analysis of residual enzyme function is a complementary method to genotyping and an important tool for improving the understanding of the clinical phenotype of 21-hydroxylase deficiency. This forms the foundation for accurate clinical and genetic counseling and for prenatal diagnosis and treatment. Moreover, this report demonstrates that the combination of in vitro enzyme analysis and molecular modeling can yield novel insights into CYP450 structure-functional relationships.
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Affiliation(s)
- Yulia Grischuk
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
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Skoblov M, Shakhbazov K, Oshchepkov D, Ivanov D, Guskova A, Ivanov D, Rubtsov P, Prasolov V, Yankovsky N, Baranova A. Human RFP2 gene promoter: unique structure and unusual strength. Biochem Biophys Res Commun 2006; 342:859-66. [PMID: 16499869 PMCID: PMC1994241 DOI: 10.1016/j.bbrc.2006.01.187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2006] [Accepted: 01/31/2006] [Indexed: 11/25/2022]
Abstract
Human gene RFP2 is a candidate tumor suppressor located at 13q14.3 and deleted in multiple tumor types. To explore regulation of RFP2, we determined structure of the 5'-untranslated region of RFP2 gene and its promoter. RFP2 promoter area is TATA-less, highly enriched in G and C nucleotides, and contains multiple quadruplex forming GGGGA-repeats. Deletion analysis of 5'-flanking sequences demonstrated that repeat containing fragment possesses activity seven times exceeding that of the combined SV40 promoter/enhancer. Other unusual features of the RFP2 promoter include anomalously high electrostatic fields induced by sequence-dependent dipoles and very low nucleosome forming potential. A "minimized" version of the RFP2 promoter could be used for overexpression of the various transgenes in the mammalian cells.
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Affiliation(s)
- Mikhail Skoblov
- Russian Center of Medical Genetics, Russian Academy of Medical Sciences, Moscow, Russia
- Vavilov Institute of General Genetics, Russian Academy of Science, Moscow 117 809, Russia
| | - Konstantin Shakhbazov
- Vavilov Institute of General Genetics, Russian Academy of Science, Moscow 117 809, Russia
| | - Dmitry Oshchepkov
- Institute of Cytology and Genetics SB RAS, Novosibirsk 630090, Russia
| | - Dmitry Ivanov
- Vavilov Institute of General Genetics, Russian Academy of Science, Moscow 117 809, Russia
| | - Anna Guskova
- Russian Center of Medical Genetics, Russian Academy of Medical Sciences, Moscow, Russia
- Vavilov Institute of General Genetics, Russian Academy of Science, Moscow 117 809, Russia
| | - Dmitry Ivanov
- Engelhardt Institute of Molecular Biology, 117894 Moscow, Russia
| | - Petr Rubtsov
- Engelhardt Institute of Molecular Biology, 117894 Moscow, Russia
| | | | - Nick Yankovsky
- Russian Center of Medical Genetics, Russian Academy of Medical Sciences, Moscow, Russia
| | - Ancha Baranova
- Russian Center of Medical Genetics, Russian Academy of Medical Sciences, Moscow, Russia
- Vavilov Institute of General Genetics, Russian Academy of Science, Moscow 117 809, Russia
- Molecular and Microbiology Department, CAS, George Mason University, Fairfax, VA, USA
- * Corresponding author. E-mail address: (A. Baranova)
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Tiulpakov A, Kalintchenko N, Semitcheva T, Polyakov A, Dedov I, Sverdlova P, Kolesnikova G, Peterkova V, Rubtsov P. A potential rearrangement between CYP19 and TRPM7 genes on chromosome 15q21.2 as a cause of aromatase excess syndrome. J Clin Endocrinol Metab 2005; 90:4184-90. [PMID: 15811932 DOI: 10.1210/jc.2004-2176] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
CONTEXT Aromatase excess syndrome (AES) is a rare hereditary autosomal dominant disorder characterized by increased extraglandular aromatization of steroids and presented with heterosexual precocity in males and isosexual precocity in females. OBJECTIVE The objective was to study the molecular basis of AES in a kindred with 16 affected subjects, both males and females. PATIENTS The propositus, currently a 17-year-old boy, presented with breast enlargement in the first year of life, which persisted thereafter. Investigations at the age of 7.5 yr revealed growth acceleration (height sd score, 2.8), puberty staging Tanner P1B3, testicular volume 6 ml, and bone age 13 yr. The hormonal data were compatible with increased conversion of androgens to estrogens, which was independent of gonadotropin secretion. In the affected adults, there were short stature (height sd score ranged from -3.7 to -2), gynecomastia in males, and macromastia in females. DESIGN Linkage analysis was performed using a polymorphic tetranucleotide (TTTA) repeat marker at nucleotide position 682 of CYP gene, as well as two additional STS markers, D15S123 (CA)n and D15S209 (CA)n, located within genetic distance of less than 5 cM from CYP19 gene. Using RNA extracted from the breast tissue of the propositus, a 5'-rapid amplification of cDNA ends (RACE) was performed with gene-specific primers corresponding to exon 2 of CYP19 gene. RESULTS Linkage analysis with (TTTA)n, D15S123 (CA)n, and D15S209 (CA)n markers produced LOD scores 0.85, 1.5, and 1.17, respectively. 5'-RACE revealed a novel untranslated exon 1 composed by exon 1 of TRPM7 gene (Transient Receptor Potential Cation Channel, Subfamily M, member 7), which has ubiquitous expression. CONCLUSIONS 5'-RACE finding points to a potential rearrangement between CYP19 and TRPM7 genes on chromosome 15q21.2 as a cause of AES.
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Affiliation(s)
- Anatoly Tiulpakov
- Endocrinological Research Center, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russian Federation.
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Tiulpakov A, Rubtsov P, Dedov I, Peterkova V, Bezlepkina O, Chrousos GP, Hochberg Z. A novel C-terminal growth hormone receptor (GHR) mutation results in impaired GHR-STAT5 but normal STAT-3 signaling. J Clin Endocrinol Metab 2005; 90:542-7. [PMID: 15536163 DOI: 10.1210/jc.2003-2133] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
GH insensitivity (GHI) is an autosomal recessive disorder caused by defects in the GH receptor (GHR). In a 17-yr-old female with severe short stature and biochemical features of GHI, sequencing of GHR gene revealed a compound heterozygosity for two novel mutations: C83X and a G deletion at position 1776 (1776del). 1776del is predicted to result in GHR truncation to 581 amino acids with a nonsense sequence of residues 560-581. To clarify the effect of 1776del on GHR function, wild-type GHR, GHR-1776del, and two additional GHR mutants, GHR-L561X (stop codon at site of the 1776del) and GHR-I582X (translation termination in GHR-1776del) were transiently expressed in CHO cells. After incubation with recombinant human GH, GHR-1776del showed lower signal transducer and activator of transcription 5 (STAT5)-mediated transcriptional activation ( approximately 50%, P < 0.05), as well as STAT5 Tyr694 phosphorylation (P < 0.05) compared with wild-type GHR, whereas GHR-L561X and GHR-I582X showed normal STAT5 phosphorylation and transcriptional activity. In contrast, all vectors produced similar effects on STAT3-mediated transcriptional activation. In conclusion, this novel GHR-1776del mutation in a classical GHI patient illustrates an important mechanism of impaired GHR-STAT5 but intact GHR-STAT3 signaling. This effect might result from interference of C-terminal nonsense sequence in mutated GHR with STAT5 docking to upstream tyrosine residues.
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Affiliation(s)
- Anatoly Tiulpakov
- Pediatric and Reproductive Endocrinology Branch, National Institute of Child Health and Human Development, National Institutes of Health, 10 Center Drive, Building 10, Suite 9D42, Bethesda, Maryland 20892, USA.
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