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Baroncelli GI, Sessa MR, Pelosini C, Bertelloni S, Michelucci A, Toschi B, Piaggi P, Peroni D, Comberiati P. Intact FGF23 concentration in healthy infants, children, and adolescents, and diagnostic usefulness in patients with X-linked hypophosphatemic rickets. J Endocrinol Invest 2024; 47:873-882. [PMID: 37991698 DOI: 10.1007/s40618-023-02202-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 09/14/2023] [Indexed: 11/23/2023]
Abstract
OBJECTIVE FGF23 measurement may have a diagnostic role to investigate patients with phosphate disorders. However, normal values for infants, children, and adolescents have not been defined. METHODS In a total of 282 (males 145, females 137) healthy infants (n = 30), prepubertal (n = 147), pubertal (n = 59), and postpubertal (n = 46), and in twenty patients with X-linked hypophosphatemic rickets (XLH, age 10.2 ± 5.6 years) serum phosphate (automated analyzer), and plasma intact FGF23 (immunochemiluminescent sandwich assay, DiaSorin) concentrations were measured. RESULTS Intact FGF23 concentrations were higher in healthy infants than in prepubertal (P < 0.01) and postpubertal subjects (P < 0.05); pubertal subjects showed higher values (P < 0.05) than postpubertal subjects. Serum phosphate concentrations were higher (P < 0.001) in healthy infants than in prepubertal, pubertal, and postpubertal subjects. Pubertal subjects had higher (P < 0.001) serum phosphate concentrations than postpubertal subjects. Intact FGF23 and serum phosphate concentrations did not differ (P = NS) by sex, age of menarche, and time after menarche. In healthy subjects, there was no correlation between intact FGF23 and serum phosphate concentrations. Intact FGF23 concentrations were higher (P < 0.0001) in patients with XLH than in healthy subjects according to chronological age and pubertal development. In all patients, intact FGF23 concentrations were above 40 pg/mL; intact FGF23 concentrations were inversely correlated with serum phosphate concentrations (r = -0.65; P < 0.01). CONCLUSION In healthy subjects, chronological age and puberty were main determinants of intact FGF23 concentrations. Intact FGF23 concentrations may be a useful marker for the early diagnosis of XLH in pediatric patients.
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Affiliation(s)
- G I Baroncelli
- Pediatric and Adolescent Endocrinology, Division of Pediatrics, Department of Obstetrics, Gynecology and Pediatrics, University Hospital, Pisa, Italy
| | - M R Sessa
- Chemistry and Endocrinology Laboratory, Department of Laboratory Medicine, University Hospital, Pisa, Italy
| | - C Pelosini
- Chemistry and Endocrinology Laboratory, Department of Laboratory Medicine, University Hospital, Pisa, Italy
| | - S Bertelloni
- Pediatric and Adolescent Endocrinology, Division of Pediatrics, Department of Obstetrics, Gynecology and Pediatrics, University Hospital, Pisa, Italy
| | - A Michelucci
- Unit of Molecular Genetics, Department of Laboratory Medicine, University Hospital, Pisa, Italy
| | - B Toschi
- Section of Medical Genetics, Department of Medical and Oncological Area, University Hospital, Pisa, Italy
| | - P Piaggi
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ, USA
- Department of Information Engineering, University of Pisa, Pisa, Italy
| | - D Peroni
- Department of Clinical and Experimental Medicine, Section of Pediatrics, University of Pisa, Pisa, Italy
| | - P Comberiati
- Department of Clinical and Experimental Medicine, Section of Pediatrics, University of Pisa, Pisa, Italy.
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Ceccarini G, Pelosini C, Paoli M, Tyutyusheva N, Magno S, Gilio D, Palladino L, Sessa MR, Bertelloni S, Santini F. Serum levels of adiponectin differentiate generalized lipodystrophies from anorexia nervosa. J Endocrinol Invest 2024:10.1007/s40618-024-02308-3. [PMID: 38358463 DOI: 10.1007/s40618-024-02308-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 01/09/2024] [Indexed: 02/16/2024]
Abstract
PURPOSE The differential diagnosis of lipodystrophy involves other disorders characterized by severe fat loss and may be sometimes challenging. Owing to the rarity of lipodystrophy, it is relevant to search for tools and assays that differentiate it from other diseases that may mimic it. We conducted a study on leptin and high molecular weight (HMW) adiponectin serum concentrations in a series of patients diagnosed with lipodystrophy and compared them with those found in anorexia nervosa, one of the illnesses that may be cause of a missed diagnosis of lipodystrophy. METHODS Leptin and HMW adiponectin serum concentrations were measured in six patients diagnosed with generalized lipodystrophy (GL), six with progeroid syndromes (PS), 13 with familial partial lipodystrophy type 1 (FPLD1, Kobberling syndrome), 10 with familial partial lipodystrophy type 2 (FPLD2, Dunnigan syndrome), 18 with acquired partial lipodystrophy (APL) and 12 affected by anorexia nervosa (AN). Measurements were compared to those obtained in 12 normal weight healthy subjects. RESULTS Serum leptin concentrations were reduced to a similar degree in GL, PS and AN, proportionally to the extent of fat loss. Serum concentrations of HMW adiponectin were found extremely low in patients with GL and PS, while comparable to normal weight subjects in patients with AN. CONCLUSION Serum HMW adiponectin can be regarded as a useful tool to discriminate between generalized lipodystrophy syndromes (including PS) and AN.
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Affiliation(s)
- G Ceccarini
- Obesity and Lipodystrophy Center, Endocrinology Unit, University Hospital of Pisa, Pisa, Italy.
| | - C Pelosini
- Obesity and Lipodystrophy Center, Endocrinology Unit, University Hospital of Pisa, Pisa, Italy
- Chemistry and Endocrinology Laboratory, University Hospital of Pisa, Pisa, Italy
| | - M Paoli
- Chemistry and Endocrinology Laboratory, University Hospital of Pisa, Pisa, Italy
| | - N Tyutyusheva
- Pediatric Unit, University Hospital of Pisa, Pisa, Italy
| | - S Magno
- Obesity and Lipodystrophy Center, Endocrinology Unit, University Hospital of Pisa, Pisa, Italy
| | - D Gilio
- Obesity and Lipodystrophy Center, Endocrinology Unit, University Hospital of Pisa, Pisa, Italy
| | - L Palladino
- Obesity and Lipodystrophy Center, Endocrinology Unit, University Hospital of Pisa, Pisa, Italy
| | - M R Sessa
- Chemistry and Endocrinology Laboratory, University Hospital of Pisa, Pisa, Italy
| | - S Bertelloni
- Pediatric Unit, University Hospital of Pisa, Pisa, Italy
| | - F Santini
- Obesity and Lipodystrophy Center, Endocrinology Unit, University Hospital of Pisa, Pisa, Italy
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Agretti P, Pelosini C, Bianchi L, Grosso AD, Saba A, Canale D, Sessa MR. Importance of total and measured free testosterone in diagnosis of male hypogonadism: immunoassay versus mass spectrometry in a population of healthy young/middle-aged blood donors. J Endocrinol Invest 2021; 44:321-326. [PMID: 32474765 DOI: 10.1007/s40618-020-01304-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 05/20/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE To meet clinicians' request for adequate results and reliable reference ranges for testosterone, this study was planned with the aims (i) to verify the reliability of the reference interval for total testosterone (TT) declared by immunoassay manufacturer and adopted by laboratory, (ii) to compare results for serum TT obtained by immunoassay and LC-MS/MS and (iii) to verify if the cutoff values for low TT and measured free testosterone (FT), defined by Endocrine Society Guidelines for diagnosis of hypogonadism, are applicable to our study group. METHODS Sera from anonymous young/middle-aged male blood donors were selected for the study. TT was measured by immunoassay and LC-MS/MS. SHBG was measured by immunoassay and used with albumin concentration to calculate FT according to Vermeulen's formula. RESULTS The reference interval declared by the manufacturer and adopted by the lab was validated. The two methods for TT evaluation correlated very well. TT and FT lower limits at 5th and 2.5th percentile are below the cutoffs reported in the literature for the diagnosis of hypogonadism. CONCLUSIONS The immunoassay currently used in our lab can be considered an adequate tool for TT, but it's essential that clinical data agree with the biochemical ones, particularly in the presence of TT values between the lower limit of reference range and the cutoff values recommended by scientific societies.
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Affiliation(s)
- P Agretti
- Laboratory of Chemistry and Endocrinology, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy.
| | - C Pelosini
- Laboratory of Chemistry and Endocrinology, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - L Bianchi
- Laboratory of Chemistry and Endocrinology, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - A Del Grosso
- Laboratory of Chemistry and Endocrinology, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - A Saba
- Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Via Savi 10, 56126, Pisa, Italy
- Laboratory of Clinical Pathology, University Hospital of Pisa, Via Roma 67, 56126, Pisa, Italy
| | - D Canale
- Endocrinology Unit, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - M R Sessa
- Laboratory of Chemistry and Endocrinology, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
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Costagliola G, Cosci O di Coscio M, Masini B, Baldinotti F, Caligo MA, Tyutyusheva N, Sessa MR, Peroni D, Bertelloni S. Disorders of sexual development with XY karyotype and female phenotype: clinical findings and genetic background in a cohort from a single centre. J Endocrinol Invest 2021; 44:145-151. [PMID: 32378143 DOI: 10.1007/s40618-020-01284-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 04/28/2020] [Indexed: 12/12/2022]
Abstract
PURPOSE 46, XY disorders (or differences) of sex development (DSD) are a group of clinical conditions with variable genetic background; correct diagnosis is often difficult, but it permits to optimize the management. The aim of this study is to identify clinical and genetics features of a group of women with 46, XY DSD to define some issues characterizing people with 46, XY DSD in Italy. METHODS Retrospective analysis of girls and women with 46, XY DSD and female phenotype evaluated between year 2000 and 2016, performed by anonymised database, focusing on the clinical features and management, including presentation, first diagnostic suspect, gonadal surgery and molecular diagnostic delay. RESULTS A total of 84 records were collected (mean age at clinical presentation: 9.1 ± 7.9 years; mean age at definitive diagnosis: 20.1 ± 15.0 years). Complete androgen insensitivity syndrome was the most common diagnosis (60%). Only 12 patients (14.3%) did not receive a molecular diagnosis. Early misdiagnoses frequently occurred; diagnostic delay was 10.2 ± 11.2 years, being reduced in patients presenting from 2007 to 2016. The discordance between genotypic and phenotypic sex during pregnancy or at birth determined early reason for referral in a considerable percentage (4.9%). CONCLUSION Misdiagnosis and long diagnostic delays are present in females with 46, XY DSD in Italy, but the new genetic techniques permit faster right diagnoses in the last years. The centralization in dedicated third level units permits to reduce the number of patients without a molecular diagnosis, allowing better clinical management and appropriate genetic counselling.
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Affiliation(s)
- G Costagliola
- Division of Paediatrics, Department of Clinical and Experimental Medicine, Pediatric and Adolescent Endocrinology, University of Pisa, Pisa, Italy
| | - M Cosci O di Coscio
- Division of Paediatrics, Department of Clinical and Experimental Medicine, Pediatric and Adolescent Endocrinology, University of Pisa, Pisa, Italy
| | - B Masini
- Division of Paediatrics, Department of Clinical and Experimental Medicine, Pediatric and Adolescent Endocrinology, University of Pisa, Pisa, Italy
| | - F Baldinotti
- Laboratory of Molecular Genetics, Azienda Ospedaliero Universitaria Pisa, Pisa, Italy
| | - M A Caligo
- Laboratory of Molecular Genetics, Azienda Ospedaliero Universitaria Pisa, Pisa, Italy
| | - N Tyutyusheva
- Division of Paediatrics, Department of Clinical and Experimental Medicine, Pediatric and Adolescent Endocrinology, University of Pisa, Pisa, Italy
| | - M R Sessa
- Laboratory of Endocrinology, Azienda Ospedaliero Universitaria Pisa, Pisa, Italy
| | - D Peroni
- Division of Paediatrics, Department of Clinical and Experimental Medicine, Pediatric and Adolescent Endocrinology, University of Pisa, Pisa, Italy
| | - S Bertelloni
- Division of Paediatrics, Department of Clinical and Experimental Medicine, Pediatric and Adolescent Endocrinology, University of Pisa, Pisa, Italy.
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Abstract
Objective: To understand the origin of extremely high gonadotropin levels in a perimenopausal woman.Methods: A 52-year-old woman with a 2 months of amenorrhea followed spontaneous menstrual cycles recovery was referred to our outpatient clinic with elevated follicle-stimulating hormone (FSH, 483 mUI/ml), luteinizing hormone (LH, 475 mUI/ml) and prolactin (PRL, 173 ng/ml). She was known to take levosulpiride. The gonadotropin levels did not fit with the clinical features.Results: A gonadotroph tumor was ruled out. Further analysis confirmed constantly high FSH, LH and PRL levels. The measurements were repeated using different analytical platforms with different results. After serial dilutions, nonlinearity was present suggesting an immunoassay interference. After post-polyethylene glycol recovery, hormone levels appeared in the normal range. Anti-goat antibodies were recognized in the serum of the patient.Conclusions: This case report shows a case of falsely abnormal high gonadotropin and PRL levels in a woman during menopause transition. In the clinical practice the evaluation of gonadotropin profile is not recommended at this age, but the abnormal levels stimulated further evaluation. An interference in the assay due to anti-goat antibodies resulted in abnormally high level of FSH and LH. A strict collaboration between clinicians and the laboratory is needed, when laboratory findings do not correspond to clinical findings.
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Affiliation(s)
- F Fruzzetti
- Obstetrics and Gynaecology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - G Palla
- Obstetrics and Gynaecology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - A Sbrana
- Centro Ricerche Cliniche, Pisa, Italy
| | - T Simoncini
- Obstetrics and Gynaecology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - M R Sessa
- Laboratory of Chemistry and Endocrinology, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy
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Bianchi L, Campi B, Sessa MR, De Marco G, Ferrarini E, Zucchi R, Marcocci C, Vitti P, Manetti L, Saba A, Agretti P. Measurement of urinary free cortisol by LC-MS-MS: adoption of a literature reference range and comparison with our current immunometric method. J Endocrinol Invest 2019; 42:1299-1305. [PMID: 31012054 DOI: 10.1007/s40618-019-01050-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 04/10/2019] [Indexed: 10/27/2022]
Abstract
PURPOSE One of the best indicators of adrenal gland dysfunction is the level of free cortisol measured in the 24-h urine (UFC) which faithfully reflects the level of biologically active serum cortisol not subjected to circadian variations. Liquid chromatography coupled with tandem mass spectrometry (LC-MS-MS) is a sensitive, accurate and precise method recently available in routine laboratories that could remedy interference problems of immunoassays. METHODS In this study, a literature reference range for UFC measured by LC-MS-MS was verified, and UFC values measured by LC-MS-MS and immunoassay were compared. Immunometric UFC measurement was performed by ACCESS CORTISOL assay without preliminary extraction, using Beckman Coulter UniCel DxI 600 highly automated platform. Liquid chromatography-tandem mass spectrometry UFC measurement was performed by a home-made validated method using cortisol-D4 as internal standard with preliminary deproteinization of urinary samples by centrifugal filter and injection on reverse-phase column. Cortisol was analyzed in positive ion mode with an ESI interface. RESULTS The reference interval from literature (11-70 μg/day) was confirmed by results obtained for healthy study group. Comparison study of the two methods highlighted a constant and proportional systematic error with a general tendency to overestimate results for the in-use method. CONCLUSIONS In conclusion, the direct immunometric method overestimates UFC results with respect to liquid chromatography-tandem mass spectrometry which represents the reference method. The literature reference range 11-70 μg/day was confirmed and can be adopted by our lab that will shift all UFC tests performed in routine to the mass spectrometry-based method, satisfying clinicians' request.
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Affiliation(s)
- L Bianchi
- Laboratory of Chemistry and Endocrinology, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - B Campi
- Institute of Clinical Physiology, National Research Council, Via Moruzzi 1, 56124, Pisa, Italy
| | - M R Sessa
- Laboratory of Chemistry and Endocrinology, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - G De Marco
- Section of Endocrinology, Department of Clinical and Experimental Medicine, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - E Ferrarini
- Section of Endocrinology, Department of Clinical and Experimental Medicine, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - R Zucchi
- Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Via Savi 10, 56126, Pisa, Italy
| | - C Marcocci
- Section of Endocrinology, Department of Clinical and Experimental Medicine, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy
- Endocrinology Units, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - P Vitti
- Section of Endocrinology, Department of Clinical and Experimental Medicine, University of Pisa, Via Paradisa 2, 56124, Pisa, Italy
- Endocrinology Units, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - L Manetti
- Endocrinology Units, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy
| | - A Saba
- Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Via Savi 10, 56126, Pisa, Italy
- Laboratory of Clinical Pathology, University Hospital of Pisa, Via Roma 67, 56126, Pisa, Italy
| | - P Agretti
- Laboratory of Chemistry and Endocrinology, University Hospital of Pisa, Via Paradisa 2, 56124, Pisa, Italy.
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Abstract
The micronucleus test in peripheral blood lymphocytes was employed in the cytogenetic monitoring of children with acute lymphocytic leukemia (ALL), who had undergone chemotherapy and radiotherapy. Patients were treated with a variety of drugs, which included vincristine, methotrexate, daunomycin and prednisone; they also underwent cranial irradiation at the end of the first intensive phase of therapy. The first group under study consisted of 15 subjects on therapy, who showed a marked increase in micronucleated lymphocytes (mean: 19.96 +/- 12.96%) as a consequence of treatment compared with the control group (mean: 3.67 +/- 1.55%), while lower average values were obtained from 15 other subjects at the end of treatment (mean: 13.16 +/- 8.44%). A group of 6 patients was monitored during the entire period of therapy, namely at diagnosis, after 3 months of therapy, throughout maintenance therapy and at the end of it. The whole treatment lasted about 2 years. The results revealed a marked increase in basal micronucleus frequency, due to therapy: the micronucleated lymphocyte frequency remained significantly high throughout the treatment for almost all patients. These data clearly suggest the validity of the methodology in pointing out the role played by antileukemic agents in inducing somatic genetic damage.
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Affiliation(s)
- L Migliore
- Dipartimento di Scienze, Università di Pisa, Italy
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Rainaldi G, Sessa MR, Mariani T. Inhibitors of DNA synthesis induce sister chromatid exchanges at the early S phase of the cell cycle. Chromosoma 1984; 90:46-9. [PMID: 6432492 DOI: 10.1007/bf00352277] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
To investigate the origin of sister chromatid exchanges (SCEs) induced by inhibitors of DNA synthesis, V79/AP4 Chinese hamster cells were treated with aphidicolin, 1-beta-D-arabinofuranosylcytosine, and thymidine. At the end of the treatments we determined both the distribution of the cells in the various phases of the cell cycle and the induction of SCEs. Our data indicate that the cells that were replicating their DNA were arrested at various stages of the S phase. By analyzing the patterns of SCE distribution, we found that the metaphases of the treated cells exhibited either "normal" or enhanced levels of SCEs. Our results suggest that the inhibitors of DNA synthesis induce SCEs in the cells in early S phase probably by activation of potential replicative origins.
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