What is steroid sulfatase deficiency?
What is steroid sulfatase deficiency?
Placental steroid sulphatase deficiency (SSD) is an X-linked inborn error of metabolism. Congenital X-linked ichthyosis (XLI) is a genetic disorder of keratinisation caused by steroid sulphatase (STS) deficiency, which results in a scaling skin condition in male infants shortly after birth.
What is the STS gene?
The STS gene encodes steroid sulfatase (EC 3.1. 6.2), a membrane-bound microsomal enzyme that is ubiquitously expressed and hydrolyzes several 3-beta-hydroxysteroid sulfates, which serve as metabolic precursors for estrogens, androgens, and cholesterol (Stein et al., 1989; Alperin and Shapiro, 1997).
What is congenital ichthyosis?
Congenital ichthyosis is a collective name for a group of monogenetic disorders of cornification, sometimes associated with systemic symptoms. There may be an abnormal quality or quantity of scale produced, abnormal thickness of stratum corneum or abnormal keratinocyte kinetics, often associated with skin inflammation.
What is placental sulfatase deficiency?
Abstract. Summary: Placental steroid sulfatase deficiency is a genetic disorder only recently reported in the medical literature. Most documented cases of placental sulfatase deficiency have been marked by delay in onset of labor, lack of cervical dilatation, and relative refractoriness of oxytocic agents and amniotomy …
What is Austin disease?
Multiple sulfatase deficiency (MSD), also known as Austin disease, or mucosulfatidosis, is a very rare autosomal recessive lysosomal storage disease caused by a deficiency in multiple sulfatase enzymes, or in formylglycine-generating enzyme, which activates sulfatases. It is similar to mucopolysaccharidosis.
How do you describe ichthyosis?
Ichthyosis is a condition that causes widespread and persistent thick, dry, “fish-scale” skin. Credit: There are at least 20 different types of ichthyosis. Some types are inherited at birth and other types are acquired during adulthood.
What does lamellar ichthyosis look like?
The appearance is often described as a shiny film looking like a layer of Vaseline. The eyelids and mouth may have the appearance of being forced open due to the tightness of the skin. There can be associated eversion of the eyelids (ectropion).
What layer of the skin does ichthyosis affect?
In ichthyosis vulgaris, the skin cells are produced at a normal rate, but they do not shed normally at the surface of the outermost layer of skin (stratum corneum) and are not shed as quickly as they should be. The result is a build-up of scale.
What is post maturity syndrome?
“Dysmaturity” or “postmaturity” syndrome refers to a fetus whose weight gain in the uterus after the due date has stopped, usually due to a problem with delivery of blood to the fetus through the placenta, leading to malnourishment. After birth, these infants have a distinctive appearance.
What are the characteristics of someone on the autism spectrum?
The following characteristics associated with ASD are loosely based on the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5™) and should be used to gain a better understanding of individuals identified with ASD, design a program, or facilitate discussion. All individuals with ASD exhibit social communication impairments.
What are the characteristics of a child with ASD?
Repetitive and characteristic behaviors. Many children with ASD engage in repetitive movements or unusual behaviors such as flapping their arms, rocking from side to side, or twirling. They may become preoccupied with parts of objects like the wheels on a toy truck.
How are children with autism different from other children?
In addition, they might not be afraid of dangerous things, and they could be fearful of harmless objects or events. Children with ASD develop at different rates in different areas. They may have delays in language, social, and learning skills, while their ability to walk and move around are about the same as other children their age.
How does Autism Spectrum Disorder affect your life?
People with ASD also have a higher than average risk of having epilepsy. Children whose language skills regress early in life — before age 3 — appear to have a risk of developing epilepsy or seizure-like brain activity. About 20 to 30 percent of children with ASD develop epilepsy by the time they reach adulthood.
