Epidemiological characteristics of patients with Hutchinson-Gilford progeria syndrome and progeroid laminopathies in China.

BACKGROUND: Hutchinson-Gilford progeria syndrome (HGPS) and progeroid laminopathies (PL) are extremely rare genetic diseases with extremely poor prognoses. This study aims to investigate the epidemiological and genotypic characteristics of patients with HGPS/PL in China. METHODS: Using a cross-sectional study design, general characteristics and genotypic data of 46 patients with HGPS/PL from 17 provinces in China were analyzed. RESULTS: Among the 46 patients with HGPS/PL, 20 patients are HGPS, and the rest are PL; the identified total prevalence of HGPS/PL is 1/23 million. Among 42 patients with gene reports, 3 carried compound heterozygous mutations in the ZMPSTE24 while the other 39 carried LMNA mutations. Among PL, LMNA c.1579 C > T homozygous mutation was the most common. The onset of classic genotype HGPS is skin sclerosis in the first month after birth. The primary clinical manifestations of PL patients include skin abnormalities, growth retardation, and joint stiffness. The median age of onset for PL was 12 (6,12) months. CONCLUSIONS: In China, the identified total prevalence of HGPS/PL is 1/23 million. 92.8% of the genetic mutations of HGPS/PL were located in LMNA, and the rest in ZMPSTE24. Most patients of HGPS/PL have skin abnormalities as the earliest manifestation. Compared to PL, the classic genotype HGPS starts earlier. IMPACT STATEMENT: Hutchinson-Gilford progeria syndrome (HGPS) and progeroid laminopathies (PL) are extremely rare genetic diseases with extremely poor prognoses. To date, there is a paucity of epidemiological data related to HGPS/PL in China. This study first examined the genotypic, phenotypic, and prevalence characteristics of 40-50% of the cases of HGPS/PL in mainland China through a collaborative international registry effort. In China, the identified total prevalence of HGPS/PL is 1/23 million. 92.8% of the genetic mutations of HGPS/PL are located in LMNA. LMNA c.1579 C > T homozygous mutations are the most common form of gene mutations among the Chinese PL population.

Skeletal maturation and long-bone growth patterns of patients with progeria: a retrospective study.

BACKGROUND: Hutchinson-Gilford progeria syndrome (termed progeria in this Article) is a rare sporadic genetic disorder. One early clinical manifestation of progeria is abnormal skeletal growth, yet this growth has not been fully characterised. We aimed to characterise the skeletal maturation and long-bone growth patterns of patients with the clinical phenotype of progeria. METHODS: For this retrospective study, we reviewed skeletal surveys of patients (aged <20 years) with progeria obtained over a 9·5-year period. Most surveys included radiographs of the hands and long bones (humeri, radii, ulnas, tibias, and fibulas). Bone ages of these patients were estimated by the standards of Greulich and Pyle. Following the established methods for studying long-bone growth, the study cohort was separated into two overlapping age groups: longitudinal bone length measurements were made between physes for the childhood group (aged 12 years or younger) and from the upper margins of the proximal to the lower margin of the distal ossified epiphyses for the adolescent group (aged 10 years or older). Bone age estimates and bone length measurements were plotted against the chronological age of patients and compared with reference standards. Statistical analyses were based on mixed models. FINDINGS: 85 patients with progeria and 250 skeletal surveys were included in our study. For both sexes, bone age estimates showed a more advanced skeletal maturation rate throughout all chronological ages than the normal rate of 1 (p<0·0001), with the rate of maturation being 1·09 (SE 0·02) for boys and 1·14 (0·02) for girls. Longitudinal long-bone lengths began to deviate from normal standards by age 1-2 years. Growth curves for these long bones plateaued at about half the normal eventual bone length, and the half-life (the time taken to grow to half the eventual bone length) was also about half the time compared with normal standards. INTERPRETATION: Our study established growth curves that might serve as reference standards for skeletal maturation and long-bone growth of patients with the clinical phenotype of progeria. FUNDING: The Progeria Research Foundation, the US National Heart, Lung and Blood Institute, the Dana-Farber Cancer Institute Stop&Shop Pediatric Brain Tumor Program, the US National Center for Research Resources, US National Institutes of Health.

Mecanismos de envejecimiento vascular: ¿Qué podemos aprender del síndrome de progeria de Hutchinson-Gilford? / Mechanisms of vascular aging: What can we learn from Hutchinson-Gilford progeria syndrome?

El envejecimiento es el principal factor de riesgo de enfermedad cardiovascular (ECV) y su prevalencia está aumentando progresivamente debido en gran parte al incremento de la esperanza de vida a nivel mundial. En este contexto, es fundamental establecer cuáles son los mecanismos por los que el envejecimiento promueve el desarrollo de ECV, con el objetivo de reducir su incidencia. La aterosclerosis y la insuficiencia cardiaca contribuyen de manera significativa a la morbimortalidad por ECV asociada a la edad. El síndrome de progeria de Hutchinson-Gilford (HGPS) se caracteriza por un envejecimiento prematuro que cursa también con ECV acelerada. Se trata de un trastorno genético raro causado por la expresión de progerina, una forma mutada de la prelamina A. La progerina induce aterosclerosis masiva y alteraciones electrofisiológicas en el corazón, promueve el envejecimiento y finalmente la muerte prematura a una edad media de 14,6 años, principalmente por infarto de miocardio o ictus cerebral. En esta revisión se discuten las principales alteraciones estructurales y funcionales que afectan al sistema vascular durante el envejecimiento fisiológico y prematuro, así como los mecanismos que subyacen a la aterosclerosis y al envejecimiento exagerados inducidos por la prelamina A y la progerina. Dado que ambas proteínas se expresan en individuos sin HGPS y muchas de las características del envejecimiento normal se presentan en la progeria, la investigación en el ámbito del HGPS podría contribuir a la identificación de nuevos mecanismos implicados en el envejecimiento cardiovascular fisiológico

Aging is the main risk factor for cardiovascular disease (CVD). The increased prevalence of CVD is partly due to the global increase in life expectancy. In this context, it is essential to identify the mechanisms by which aging induces CVD, with the ultimate aim of reducing its incidence. Both atherosclerosis and heart failure significantly contribute to age-associated CVD morbidity and mortality. Hutchinson-Gilford progeria syndrome (HGPS) is a rare genetic disorder caused by the synthesis of progerin, which is noted for accelerated aging and CVD. This mutant form of prelamin A induces generalised atherosclerosis, vascular calcification, and cardiac electrophysiological abnormalities, leading to premature aging and death, mainly due to myocardial infarction and stroke. This review discusses the main vascular structural and functional abnormalities during physiological and premature aging, as well as the mechanisms involved in the exacerbated CVD and accelerated aging induced by the accumulation of progerin and prelamin A. Both proteins are expressed in non-HGPS individuals, and physiological aging shares many features of progeria. Research into HGPS could therefore shed light on novel mechanisms involved in the physiological aging of the cardiovascular system

Hutchinson-Gilford Progeria Syndrome: A Premature Aging Disease.

Progeria is sporadic, very rare, autosomal dominant, deadly childhood disorder. It is one of the progeroid syndromes also known as Hutchinson-Gilford progeria syndrome (HGPS). Aging is a developmental process that begins with fertilization and ends up with death involving a lot of environmental and genetic factors. The disease firstly involves premature aging and then death from complications of atherosclerosis such as myocardial infarction, stroke, atherosclerosis, or heart failure. The lifespan of the patient is normally up to teen age or early twenties. It is usually not inherited because a patient normally dies before the age of reproduction. The most important genetic linkage between progeria and aging is shortening of telomere ends with each replication cycle. The patients are normally observed to have extremely short telomeres. Currently, 90% of the patients are said to have de novo point mutations in the LMNA gene that substitute cytosine with thymine and have been found in individuals with HGPS. Lmna encodes lamins A and C, and the A-type lamins have important structural function in the nuclear envelope. The most common type of HGPS mutation is located at codon 608 (G608G). It could not be diagnosed at birth, but after the age of 2 years, visible, prominent symptoms can be observed. Still, lot of research is needed to solve this mystery; hopefully, future research on HGPS would provide important clues for progeria and other fatal age-related disorders.

Hutchinson-Gilford progeria syndrome.

Hutchinson-Gilford progeria syndrome (HGPS) is an extremely rare, uniformly fatal, segmental "premature aging" disease in which children exhibit phenotypes that may give us insights into the aging process at both the cellular and organismal levels. Initial presentation in early childhood is primarily based on growth and dermatologic findings. Primary morbidity and mortality for children with HGPS is from atherosclerotic cardiovascular disease and strokes with death occurring at an average age of 14.6 years. There is increasing data to support a unique phenotype of the craniofacial and cerebrovascular anatomy that accompanies the premature aging process. Strokes in HGPS can occur downstream of carotid artery and/or vertebral artery occlusion, stenosis, and calcification, with prominent collateral vessel formation. Both large and small vessel disease are present, and strokes are often clinically silent. Despite the presence of multisystem premature aging, children with HGPS do not appear to have cognitive deterioration, suggesting that some aspects of brain function may be protected from the deleterious effects of progerin, the disease-causing protein. Based on limited autopsy material, there is no pathologic evidence of dementia or Alzheimer-type changes. In a transgenic mouse model of progeria with expression of the most common HGPS mutation in brain, skin, bone, and heart, there are distortions of neuronal nuclei at the ultrastructural level with irregular shape and severe invaginations, but no evidence of inclusions or aberrant tau in brain sections. Importantly, the nuclear distortions did not result in significant changes in gene expression in hippocampal neurons. This chapter will discuss both preclinical and clinical aspects of the genetics, pathobiology, clinical phenotype, clinical care, and treatment of HGPS, with special attention toward neurologic and cutaneous findings.

Neurologic features of Hutchinson-Gilford progeria syndrome after lonafarnib treatment.

OBJECTIVES: The objective of this study was to retrospectively evaluate neurologic status pre- and posttreatment with the oral farnesyltransferase inhibitor lonafarnib in children with Hutchinson-Gilford progeria syndrome (HGPS), a rare, fatal disorder of segmental premature aging that results in early death by myocardial infarction or stroke. METHODS: The primary outcome measure for intervention with lonafarnib was to assess increase over pretherapy in estimated annual rate of weight gain. In this study, neurologic signs and symptoms were compared pre- and posttreatment with lonafarnib. RESULTS: Twenty-six participants were treated for a minimum of 2 years. Frequency of clinical strokes, headaches, and seizures was reduced from pretrial rates. Three patients with a history of frequent TIAs and average clinical stroke frequency of 1.75/year during the year before treatment experienced no new events during treatment. One patient with a history of stroke died due to large-vessel hemispheric stroke after 5 months on treatment. Headache prevalence and frequency were reduced. Four patients exhibited pretherapy seizures and no patients experienced recurrent or new-onset seizures. CONCLUSIONS: This study provides preliminary evidence that lonafarnib therapy may improve neurologic status of children with HGPS. To address this question, we have incorporated prospective neuroimaging and neurologic assessments as measures in subsequent studies involving children with HGPS. CLASSIFICATION OF EVIDENCE: This study provides Class IV evidence that lonafarnib 115-150 mg/m(2) for 24 to 29 months reduces the prevalence of stroke and TIA and the prevalence and frequency of headache over the treatment period.

LMNA-associated cardiocutaneous progeria: an inherited autosomal dominant premature aging syndrome with late onset.

Hutchinson-Gilford Progeria Syndrome (HGPS) is a premature aging disorder caused by mutations in LMNA, which encodes the nuclear scaffold proteins lamin A and C. In HGPS and related progerias, processing of prelamin A is blocked at a critical step mediated by the zinc metalloprotease ZMPSTE24. LMNA-linked progerias can be grouped into two classes: (1) the processing-deficient, early onset "typical" progerias (e.g., HGPS), and (2) the processing-proficient "atypical" progeria syndromes (APS) that are later in onset. Here we describe a previously unrecognized progeria syndrome with prominent cutaneous and cardiovascular manifestations belonging to the second class. We suggest the name LMNA-associated cardiocutaneous progeria syndrome (LCPS) for this disorder. Affected patients are normal at birth but undergo progressive cutaneous changes in childhood and die in middle age of cardiovascular complications, including accelerated atherosclerosis, calcific valve disease, and cardiomyopathy. In addition, the proband demonstrated cancer susceptibility, a phenotype rarely described for LMNA-based progeria disorders. The LMNA mutation that caused LCPS in this family is a heterozygous c.899A>G (p.D300G) mutation predicted to alter the coiled-coil domain of lamin A/C. In skin fibroblasts isolated from the proband, the processing and levels of lamin A and C are normal. However, nuclear morphology is aberrant and rescued by treatment with farnesyltransferase inhibitors, as is also the case for HGPS and other laminopathies. Our findings advance knowledge of human LMNA progeria syndromes, and raise the possibility that typical and atypical progerias may converge upon a common mechanism to cause premature aging disease.

Mechanisms of premature vascular aging in children with Hutchinson-Gilford progeria syndrome.

Hutchinson-Gilford progeria syndrome is a rare, segmental premature aging syndrome of accelerated atherosclerosis and early death from myocardial infarction or stroke. This study sought to establish comprehensive characterization of the fatal vasculopathy in Hutchinson-Gilford progeria syndrome and its relevance to normal aging. We performed cardiovascular assessments at a single clinical site on the largest prospectively studied cohort to date. Carotid-femoral pulse wave velocity was dramatically elevated (mean: 13.00±3.83 m/s). Carotid duplex ultrasound echobrightness, assessed in predefined tissue sites as a measure of arterial wall density, was significantly greater than age- and sex-matched controls in the intima-media (P<0.02), near adventitia (P<0.003), and deep adventitia (P<0.01), as was internal carotid artery mean flow velocity (P<0.0001). Ankle-brachial indices were abnormal in 78% of patients. Effective disease treatments may be heralded by normalizing trends of these noninvasive cardiovascular measures. The data demonstrate that, along with peripheral vascular occlusive disease, accelerated vascular stiffening is an early and pervasive mechanism of vascular disease in Hutchinson-Gilford progeria syndrome. There is considerable overlap with cardiovascular changes of normal aging, which reinforces the view that defining mechanisms of cardiovascular disease in Hutchinson-Gilford progeria syndrome provides a unique opportunity to isolate a subset of factors influencing cardiovascular disease in the general aging population.

Effect of Tokaj wine in combination with water and 10% alcohol solution on long-life and development of alcohol progeria in Wistar SPF rats.

Whole-life consumption of the pure Tokaj wine (The Furmint variety) with documented antioxidative activity significantly elongated (p<0.05) the life of laboratory animals in comparison to the control group consuming water and in comparison to group consuming ethanol (10%). Whole-life intake of ethanol (10%) diluted with water neither shortened nor elongated life of laboratory animals in comparison to control group consuming water. An increased dosing of the Tokaj wine combined with water shortened life expectation (p<0.001). Obviously mixing of wine and water increases the absorption of toxic elements influenced by an acid medium through the change of anions to cations, but also increased appetite resulting into obesity on the basis of hyperphagia.

Progeria: medical aspects, psychosocial perspectives, and intervention guidelines.

This article discusses progeria, a rare genetic childhood disorder that invariably results in the individual's death during early adolescence. The article begins by describing the major medical aspects of progeria. This is followed by a discussion of the psychosocial implications of the disorder with particular emphasis upon grief-triggered reactions. The article concludes with an overview of psychosocial intervention guidelines for caregivers who work with families of dying children and adolescents.

Hutchinson-Gilford progeria syndrome in siblings. Report of three new cases.

The Hutchinson-Gilford progeria syndrome is a rare, inherited, pediatric condition with features of premature and accelerated aging. The pattern of inheritance is uncertain though both autosomal dominant and autosomal recessive modes have been proposed. The patients usually present after the 1st year of life with progressive skin and skeletal changes that give rise to a characteristic physical appearance. Three siblings seen at the University of Benin Teaching Hospital are described in this report, the third documenting the occurrence of progeria in African black patients. The two older siblings show the classic physical and radiologic changes described in progeria whereas the third, a 2-year-old boy, manifests only the early physical and radiologic changes of the disease. We compare the radiologic features of progeria with those of other progeroid conditions: acrogeria, Werner's and Cockayne's syndromes.