47,XXY (Klinefelter)

/47,XXY (Klinefelter)

Management of cardiovascular complications in Klinefelter syndrome patients

Article title: Management of cardiovascular complications in Klinefelter syndrome patients

Authors: Giacomo Accardo, et al., University of Campania, Italy

Date of Publication: February 2019

“Klinefelter syndrome (KS) shows increased mortality when compared with mortality rates among the general population. Cardiovascular, hemostatic, metabolic diseases are implicated. Moreover, cardiac congenital anomalies in KS can contribute to the increase in mortality.”

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2019-07-19T14:42:12-04:00Categories: 47,XXY (Klinefelter)|

Oxandrolone Treatment Results in Increased Risk of Gonadarche in Prepubertal Boys With KS (early testosterone use)

Article Title: Oxandrolone Treatment Results in an Increased Risk of Gonadarche in Prepubertal Boys With Klinefelter Syndrome

Authors: Shanlee M. Davis, Najiba Lahlou, Matthew Cox-Martin, Karen Kowal, Philip S. Zeitler, and Judith L. Ross

Date of Publication: June 20, 2018

“Two years of Ox[androlone] treatment in prepubertal boys with KS results in an increased risk of early gonadarche, on average 2 years earlier than in [placebo]-treated boys. Ox did not affect serum concentrations of testicular hormones.”

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2019-05-22T12:31:48-04:00Categories: 47,XXY (Klinefelter)|Tags: |

Social cognition and underlying cognitive mechanisms in children with an extra X chromosome: a comparison with autism spectrum disorder

Article Title: Social cognition and underlying cognitive mechanisms in children with an extra X chromosome: a comparison with autism spectrum disorder

Authors: S. van Rijn, L. Stockmann, G. van Buggenhout, C. van Ravenswaaij-Arts, and H. Swaab

Date of Publication: 2014

This 2014 paper by Dr. Sophie van Rijn is an excellent study on the Theory of Mind and “the reported social behavioral difficulties in individuals with an extra X chromosome include shyness, social withdrawal, social anxiety, social immaturity, difficulties in peer relationships, social impulsivity, communication difficulties, reduced social assertiveness and difficulties with ‘being sensitive and responsive to the feelings and rights of others.”

“Individuals with an extra X chromosome are at increased  risk for autism symptoms. This study is the first to assess theory of mind and facial affect labeling in children with an extra X chromosome.”

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2019-04-30T09:29:50-04:00Categories: 47,XXX (trisomy x), 47,XXY (Klinefelter), 48,XXYY, XXXY|

Recent advances in managing and understanding Klinefelter syndrome

Article Title: Recent advances in managing and understanding Klinefelter syndrome

Authors: Priyanka Bearelly and Robert Oates

Date of Publication: January 28, 2019

“Klinefelter syndrome can present as a wide spectrum of clinical manifestations at various stages in life, making it a chromosomal disorder with no standardized set of guidelines for appropriate management. Understanding the genetic and hormonal causes of this syndrome can allow physicians to treat each patient on a more individualized basis. The timing of diagnosis and degree of symptoms can guide management. This report will provide an updated review of the clinical presentation at various stages in life and the implications for management.”

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2019-04-01T11:09:48-04:00Categories: 47,XXY (Klinefelter)|Tags: |

Autism Spectrum Disorder in Males with Sex Chromosome Aneuploidy: XXY/Klinefelter syndrome, XYY, and XXYY

Article Title: Autism Spectrum Disorder in Males with Sex Chromosome Aneuploidy: XXY/Klinefelter syndrome, XYY, and XXYY

Authors: Nicole R Tartaglia, MD, Rebecca Wilson, PsyD, Judith S. Miller, PhD, Jessica Rafalko, Lisa Cordeiro, MS, Shanlee Davis, MD, David Hessl, PhD, and Judith Ross, MD

Date of Publication: April 2017

“The rate of ASD in children with SCA in this study was higher than expected compared to the general population. Males with Y chromosome aneuploidy (XYY and XXYY) were 4.8 times more likely to have a diagnosis of ASD than the XXY/KS group, and 20 times more likely than males in the general population based on the 2010 Centers for Disease Control (CDC) estimate of 1 in 42 males. ASD is an important consideration when evaluating social difficulties for children with SCA. Studies of males with SCA and Y-chromosome genes may provide insight into idiopathic ASD and male predominance in ASD.”

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2019-02-21T11:15:50-04:00Categories: 47,XXY (Klinefelter), 47,XYY, 48,XXYY|

DNA Hypermethylation and Differential Gene Expression Associated with Klinefelter Syndrome

Article Title: DNA hypermethylation and differential gene expression associated with Klinefelter syndrome

Authors: Anne Skakkebæk, Morten Muhlig Nielsen, Christian Trolle, Søren Vang, Henrik Hornshøj, Jakob Hedegaard, Mikkel Wallentin, Anders Bojesen, Jens Michael Hertz, Jens Fedder, John Rosendahl Østergaard, Jakob Skou Pedersen, and Claus Højbjerg Gravholt

Date of Publication: September 13, 2018

“Recently, a few studies have provided evidence that KS may be associated with widespread changes in the methylome of both blood and brain tissue. These genome-wide alterations in DNA methylation may play a role in the biological mechanisms underlying the clinical KS phenotype by affecting chromatin structure and gene expression and thereby potentially be responsible for the development of phenotypical traits and diseases.
Interestingly, alterations of the trancriptome in blood, brain tissue and testis tissue in KS have also been demonstrated, thereby supporting the hypothesis that sex chromosomes may regulate gene expression throughout the genome.”

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2018-11-20T10:49:30-04:00Categories: 47,XXY (Klinefelter)|

Anxiety and Depression in Klinefelter Syndrome: The Impact of Personality and Social Engagement

Article Title: Anxiety and depression in Klinefelter syndrome: The impact of personality and social engagement

Authors: Anne Skakkebæk, Philip J. Moore, Anders Degn Pedersen, Anders Bojesen, Maria Krarup Kristensen, Jens Fedder, Jens Michael Hertz, John R. Østergaard, Mikkel Wallentin, and Claus Højbjerg Gravholt

Date of Publication: November 9, 2018

“KS patients experienced more anxiety and depression symptoms than control participants. Neuroticism was the strongest and most consistent mediator between KS and both anxiety and depression symptoms. This research suggests that neuroticism may play a central role in attention switching, anxiety and depression among patients with Klinefelter syndrome. The central role of neuroticism suggests that it may be used to help identify and treat KS patients at particularly high-risk for attention-switching deficits, anxiety and depression.”

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2018-11-10T15:08:03-04:00Categories: 47,XXY (Klinefelter)|

Testosterone Early Use Research Study – Tartaglia, 2018

Article Title: Testosterone in Infants with XXY

Authors: Nicole Tartaglia, Shideh Majidi, and Shanlee Davis

Date of Publication: 2018

“This study aims to address the question of whether exogenous testosterone during the expected mini-puberty period of infancy in boys with KS has beneficial short-term effects on body composition and development.”

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2019-05-22T12:02:01-04:00Categories: 47,XXY (Klinefelter)|Tags: |

Testosterone Early Use – Paduch, 2018

Article Title: Klinefelter Syndrome. The Effects of Early Androgen Therapy on Competence and Behavioral Phenotype

Authors: Ryan Flannigan, MD, Premal Patel, MD, and Darius A. Paduch, MD, PhD

Date of Publication: October 2018

“Our findings indicate that early androgen supplementation in children with KS combined with specific educational, family, and social support improves behavioral functioning. The optimal timing of hormonal therapy might require prospective studies, but based on our data and review of the literature, the benefit of early hormonal and therapeutic intervention in KS is very encouraging.”

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2019-05-22T12:03:15-04:00Categories: 47,XXY (Klinefelter)|Tags: |