Tuberous Sclerosis in a 19-Week Fetus: Immunohistochemical and Molecular Study of Hamartin and Tuberin

2002 ◽  
Vol 5 (5) ◽  
pp. 448-464 ◽  
Author(s):  
Jianjun Wei ◽  
Peng Li ◽  
Luis Chiriboga ◽  
Masashi Mizuguchi ◽  
Herman Yee ◽  
...  
Keyword(s):  
Gene Expression ◽  
Tuberous Sclerosis ◽  
Gestational Age ◽  
Cellular Localization ◽  
Germ Line ◽  
Molecular Study ◽  
Multiple Organ ◽  
Developmental Expression ◽  
Cardiac Rhabdomyoma ◽  
Organ Systems

Tuberous sclerosis complex (TSC) is a genetically heterogeneous disease caused by mutations of TSC1 or TSC2 genes. It involves multiple organ systems resulting in mild to lethal hamartoma formation due to gene mutation in the germ line and loss of heterozygosity (LOH) in somatic cells. Hamartin ( TSC1) and tuberin ( TSC2) are expressed broadly. However, little is known about tissue susceptibility to hamartomas when equal or similar amounts of TSC gene expression are present. In this study, we present a 19-week gestational age fetus with pathological features of TSC, which was confirmed by finding LOH of TSC2 in a cardiac rhabdomyoma. Developmental expression of hamartin and tuberin in the TSC fetus, an age-matched non-TSC fetus, and a 26-week gestational age non-TSC fetus were analyzed by immunohistochemistry. We found that in addition to the differential expression of the TSC genes in some normal tissues compared with that in the TSC-affected fetus, the cellular localization and distribution of hamartin and tuberin were dramatically different in different tissues. In general, hamartin and tuberin are mainly expressed in epithelial cells, myocytes, and neural tissues. By comparing the incidence of the hamartomas in early childhood and gene expression in tissues, it appears that tissues with co-expression of hamartin and tuberin are prone to a higher incidence of hamartomas than those expressing only one protein, or two proteins but in different patterns of cellular localization.

scholarly journals A novel TSC2 c.4511 T > C missense variant associated with tuberous sclerosis complex

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Shunzhi He ◽  
Na Lv ◽  
Hongchu Bao ◽  
Xiong Wang ◽  
Jing Li
Keyword(s):  
Tuberous Sclerosis ◽  
Tuberous Sclerosis Complex ◽  
Genetic Diagnosis ◽  
Missense Variant ◽  
Sporadic Case ◽  
Hereditary Disease ◽  
Multiple Organ ◽  
Cardiac Rhabdomyoma ◽  
Pathogenic Variants ◽  
Organ Systems

Abstract Background Tuberous sclerosis complex (TSC) is an autosomal-dominant hereditary disease characterized by hamartomas of multiple organ systems, including the brain, skin, heart, kidney and lung. Genetically, TSC is caused by pathogenic variants in the TSC1 or TSC2 gene. Case presentation We reported a sporadic case of a 32-year-old Han Chinese male diagnosed with TSC, whose spouse had a history of two spontaneous miscarriages and an induced abortion of a 30-week fetus identified with cardiac rhabdomyoma by ultrasound. A novel heterozygous missense variant in the TSC2 gene (Exon35:c.4511 T > C:p.L1504P) was identified in the male patient and the aborted fetus by next-generation sequencing, but not in his wife or both his parents. According to the ACMG/AMP criteria, this variant was classified as a “likely pathogenic” variant. Conclusion The novel TSC2:c.4511 T > C variant identified was highly likely associated with TSC and could potentially lead to adverse reproductive outcomes. IVF-ET and pre-implantation genetic diagnosis for TSC are recommended for this patient in the future to prevent fetal TSC.

MATERNAL TUBEROUS SCLEROSIS WITH FETAL CARDIAC RHABDOMYOMA – A CASE REPORT

2021 ◽  
pp. 28-30
Author(s):  
Disha Rama Harikanth ◽  
Manjushri Waikar
Keyword(s):  
Tuberous Sclerosis ◽  
Autosomal Dominant ◽  
Monitoring And Evaluation ◽  
Fetal Outcome ◽  
Multiple Organ ◽  
Careful Monitoring ◽  
Cardiac Rhabdomyoma ◽  
Organ Systems ◽  
Neurocutaneous Disorder ◽  
Life Threatening

Tuberous sclerosis is a multisystemic, autosomal dominant neurocutaneous disorder of hamartoma formation affecting multiple organ systems and hence adversely affecting the maternal and fetal outcome. We report a case of maternal tuberous sclerosis with fetal cardiac rhabdomyoma detected in utero at 22 weeks but presented at 39 weeks of gestation. We conclude that Maternal or Fetal tuberous sclerosis deserves careful monitoring and evaluation so that the patients can be counselled regarding its life threatening complications to the baby and make informed decision regarding continuation of pregnancy

scholarly journals Familial Tuberous Sclerosis: a case report

2016 ◽  
Vol 2 (3) ◽  
pp. 53
Author(s):  
Gajanan A. Surwade ◽  
Uddhav S. Khaire ◽  
Sagar P. Patil ◽  
Mamta K. Mulay ◽  
Mangala S. Borkar
Keyword(s):  
Tuberous Sclerosis ◽  
Tuberous Sclerosis Complex ◽  
Multiple Organ ◽  
Benign Tumors ◽  
Gingival Hyperplasia ◽  
Gene Encoding ◽  
Cardiac Rhabdomyoma ◽  
Pulmonary Lymphangioleiomyomatosis ◽  
Organ Systems ◽  
Neurocutaneous Syndrome

<p class="abstract"><span lang="EN-US">Tuberous sclerosis is a neurocutaneous syndrome with an autosomal dominant inheritance. Tuberous sclerosis complex Syndrome caused by mutations of either the TSC1 orTSC2 gene encoding hamartin and tuberin respectively. It is characterized by the development of benign tumors; the most common oral manifestations of TSC are fibromas (angiofibromas), gingival hyperplasia and enamel hypoplasia and the formation of hamartomas in multiple organ systems leading to morbidity and mortality. Familial tuberous sclerosis probably occurs more often than is indicated by the literature: many family members show signs of being carriers of gene for the disease when carefully examined. We report a case of 25 year old female with the features of Tuberous sclerosis complex like seizures, papules over the cheek, shagreen patch, hypomelanotic macule on arm, buttacks, pulmonary lymphangioleiomyomatosis, subependymal nodules and tubers in brain, angiomyolipoma in both kidneys and Cardiac rhabdomyoma. This article reports on a family with documented tuberous sclerosis in three generations.</span></p>

Renal Manifestations of Tuberous Sclerosis Complex

2020 ◽  
Vol 7 (3) ◽  
pp. 5-19
Author(s):  
Nikhil Nair ◽  
Ronith Chakraborty ◽  
Zubin Mahajan ◽  
Aditya Sharma ◽  
Sidarth Sethi ◽  
...  
Keyword(s):  
Tuberous Sclerosis ◽  
Tuberous Sclerosis Complex ◽  
Gene Disruption ◽  
Treatment Guidelines ◽  
Renal Cysts ◽  
Skin Lesions ◽  
Multiple Organ ◽  
Tsc2 Gene ◽  
Genetic Condition ◽  
Organ Systems

Tuberous sclerosis complex (TSC) is a genetic condition caused by a mutation in either the TSC1 or TSC2 gene. Disruption of either of these genes leads to impaired production of hamartin or tuberin proteins, leading to the manifestation of skin lesions, tumors and seizures. TSC can manifests in multiple organ systems with the cutaneous and renal systems being the most commonly affected. These manifestations can secondarily lead to the development of hypertension, chronic kidney disease, and neurocognitive declines. The renal pathologies most commonly seen in TSC are angiomyolipoma, renal cysts and less commonly, oncocytomas. In this review, we highlight the current understanding on the renal manifestations of TSC along with current diagnosis and treatment guidelines.

Genetic Etiologies, Diagnosis, and Treatment of Tuberous Sclerosis Complex

2019 ◽  
Vol 20 (1) ◽  
pp. 217-240 ◽  
Author(s):  
Catherine L. Salussolia ◽  
Katarzyna Klonowska ◽  
David J. Kwiatkowski ◽  
Mustafa Sahin
Keyword(s):  
Tuberous Sclerosis ◽  
Tuberous Sclerosis Complex ◽  
Phenotypic Variability ◽  
Mtor Inhibitors ◽  
Multiple Organ ◽  
Great Promise ◽  
Optimal Timing ◽  
Autosomal Dominant Disorder ◽  
Organ Systems ◽  
Neuropsychiatric Manifestations

Tuberous sclerosis complex (TSC) is an autosomal dominant disorder that affects multiple organ systems due to an inactivating variant in either TSC1 or TSC2, resulting in the hyperactivation of the mechanistic target of rapamycin (mTOR) pathway. Dysregulated mTOR signaling results in increased cell growth and proliferation. Clinically, TSC patients exhibit great phenotypic variability, but the neurologic and neuropsychiatric manifestations of the disease have the greatest morbidity and mortality. TSC-associated epilepsy occurs in nearly all patients and is often difficult to treat because it is refractory to multiple antiseizure medications. The advent of mTOR inhibitors offers great promise in the treatment of TSC-associated epilepsy and other neurodevelopmental manifestations of the disease; however, the optimal timing of therapeutic intervention is not yet fully understood.

scholarly journals HCMV Infection and Apoptosis: How Do Monocytes Survive HCMV Infection?

Viruses ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 533 ◽  
Author(s):  
Donna Collins-McMillen ◽  
Liudmila Chesnokova ◽  
Byeong-Jae Lee ◽  
Heather Fulkerson ◽  
Reynell Brooks ◽  
...  
Keyword(s):  
Gene Expression ◽  
Cell Survival ◽  
Hcmv Infection ◽  
Viral Gene Expression ◽  
Multiple Organ ◽  
Viral Gene ◽  
Blood Monocytes ◽  
Induced Differentiation ◽  
Organ Systems

Human cytomegalovirus (HCMV) infection of peripheral blood monocytes plays a key role in the hematogenous dissemination of the virus to multiple organ systems following primary infection or reactivation of latent virus in the bone marrow. Monocytes have a short life span of 1–3 days in circulation; thus, HCMV must alter their survival and differentiation to utilize these cells and their differentiated counterparts—macrophages—for dissemination and long term viral persistence. Because monocytes are not initially permissive for viral gene expression and replication, HCMV must control host-derived factors early during infection to prevent apoptosis or programmed cell death prior to viral induced differentiation into naturally long-lived macrophages. This review provides a short overview of HCMV infection of monocytes and describes how HCMV has evolved to utilize host cell anti-apoptotic pathways to allow infected monocytes to bridge the 48–72 h viability gate so that differentiation into a long term stable mature cell can occur. Because viral gene expression is delayed in monocytes following initial infection and only occurs (begins around two to three weeks post infection in our model) following what appears to be complete differentiation into mature macrophages or dendritic cells, or both; virally-encoded anti-apoptotic gene products cannot initially control long term infected cell survival. Anti-apoptotic viral genes are discussed in the second section of this review and we argue they would play an important role in long term macrophage or dendritic cell survival following infection-induced differentiation.

scholarly journals Effect of chronic JUUL aerosol inhalation on inflammatory states of the brain, lung, heart and colon in mice

2021 ◽  
Author(s):  
Alex Moshensky ◽  
Cameron Brand ◽  
Hasan Alhaddad ◽  
John Shin ◽  
Jorge A. Masso-Silva ◽  
...  
Keyword(s):  
Gene Expression ◽  
Inflammatory Responses ◽  
Multiple Organ ◽  
Cardiac Inflammation ◽  
Aerosol Inhalation ◽  
Organ Systems ◽  
Inflammatory State ◽  
Reward Pathways ◽  
Systemic Health

AbstractWhile health effects of conventional tobacco are well defined, data on vaping devices, including the most popular e-cigarette JUUL, are less established. Prior acute e-cigarette studies demonstrated inflammatory and cardiopulmonary physiology changes while chronic studies demonstrated extra-pulmonary effects, including neurotransmitter alterations in reward pathways. In this study we investigated effects of chronic flavored JUUL aerosol inhalation on inflammatory markers in brain, lung, heart, and colon. JUUL induced upregulation of cytokine and chemokine gene expression and increased HMGB1 and RAGE in the nucleus accumbens. Inflammatory gene expression increased in colon, and cardiopulmonary inflammatory responses to acute lung injury with lipopolysaccharide were exacerbated in the heart. Flavor-dependent changes in several responses were also observed. Our findings raise concerns regarding long-term risks of e-cigarette use as neuroinflammation may contribute to behavioral changes and mood disorders, while gut inflammation has been tied to poor systemic health and cardiac inflammation to development of heart disease.One Sentence SummaryChronic, daily inhalation of pod-based e-cigarette aerosols alters the inflammatory state across multiple organ systems in mice.

scholarly journals Renal Manifestations of Tuberous Sclerosis Complex

2020 ◽  
Vol 7 (3) ◽  
pp. 5-19
Author(s):  
Nikhil Nair ◽  
Ronith Chakraborty ◽  
Zubin Mahajan ◽  
Aditya Sharma ◽  
Sidharth K. Sethi ◽  
...  
Keyword(s):  
Tuberous Sclerosis ◽  
Tuberous Sclerosis Complex ◽  
Gene Disruption ◽  
Treatment Guidelines ◽  
Renal Cysts ◽  
Skin Lesions ◽  
Multiple Organ ◽  
Tsc2 Gene ◽  
Genetic Condition ◽  
Organ Systems

Tuberous sclerosis complex (TSC) is a genetic condition caused by a mutation in either the TSC1 or TSC2 gene. Disruption of either of these genes leads to impaired production of hamartin or tuberin proteins, leading to the manifestation of skin lesions, tumors, and seizures. TSC can manifest in multiple organ systems with the cutaneous and renal systems being the most commonly affected. These manifestations can secondarily lead to the development of hypertension, chronic kidney disease, and neurocognitive declines. The renal pathologies most commonly seen in TSC are angiomyolipoma, renal cysts, and less commonly, oncocytomas. In this review, we highlight the current understanding on the renal manifestations of TSC along with current diagnosis and treatment guidelines.

scholarly journals Myelin Pathology Beyond White Matter in Tuberous Sclerosis Complex (TSC) Cortical Tubers

2020 ◽  
Vol 79 (10) ◽  
pp. 1054-1064
Author(s):  
Angelika Mühlebner ◽  
Jackelien van Scheppingen ◽  
Andrew de Neef ◽  
Anika Bongaarts ◽  
Till S Zimmer ◽  
...  
Keyword(s):  
White Matter ◽  
Tuberous Sclerosis ◽  
Tuberous Sclerosis Complex ◽  
Basic Protein ◽  
Autism Spectrum ◽  
Multiple Organ ◽  
Small Subset ◽  
Organ Systems ◽  
Quantitative Image ◽  
Cortical Tubers

Abstract Tuberous sclerosis complex (TSC) is a monogenetic disease that arises due to mutations in either the TSC1 or TSC2 gene and affects multiple organ systems. One of the hallmark manifestations of TSC are cortical malformations referred to as cortical tubers. These tubers are frequently associated with treatment-resistant epilepsy. Some of these patients are candidates for epilepsy surgery. White matter abnormalities, such as loss of myelin and oligodendroglia, have been described in a small subset of resected tubers but mechanisms underlying this phenomenon are unclear. Herein, we analyzed a variety of neuropathologic and immunohistochemical features in gray and white matter areas of resected cortical tubers from 46 TSC patients using semi-automated quantitative image analysis. We observed divergent amounts of myelin basic protein as well as numbers of oligodendroglia in both gray and white matter when compared with matched controls. Analyses of clinical data indicated that reduced numbers of oligodendroglia were associated with lower numbers on the intelligence quotient scale and that lower amounts of myelin-associated oligodendrocyte basic protein were associated with the presence of autism-spectrum disorder. In conclusion, myelin pathology in cortical tubers extends beyond the white matter and may be linked to cognitive dysfunction in TSC patients.

scholarly journals Multimodal Imaging in the Prenatal Diagnosis of Tuberous Sclerosis Complex

2012 ◽  
Vol 2012 ◽  
pp. 1-3 ◽  
Author(s):  
Mariya Gusman ◽  
Sabah Servaes ◽  
Tamara Feygin ◽  
Karl Degenhardt ◽  
Monica Epelman
Keyword(s):  
Tuberous Sclerosis ◽  
Tuberous Sclerosis Complex ◽  
Perinatal Care ◽  
Multiple Organ ◽  
Autosomal Dominant Disorder ◽  
Optimal Care ◽  
Organ Systems ◽  
Multiple Imaging ◽  
Additional Imaging ◽  
High Level

Tuberous sclerosis complex (TSC) is an autosomal dominant disorder in which benign hamartomas develop in multiple organ systems. Increasingly, stigmata of the disease, such as cardiac rhabdomyomas, are detected on routine prenatal ultrasound. Such a finding should prompt additional imaging studies in order to confirm diagnosis and to identify potential complications, which vary greatly from patient to patient. Early diagnosis allows for accurate parental counseling, coordination of high-level perinatal care, and subspecialty followup. We present a case of TSC in utero wherein access to and use of multiple imaging modalities confirmed diagnosis and allowed the patient to receive optimal care prior to birth.

Sign in / Sign up

Export Citation Format

Share Document