Fazio Londe syndrome: A treatable disorder

Poovazhagi Varadarajan1, Vimal Thayanathi2, Leema C Pauline3

  • 1Department of Pediatrics, Government Raja Mirasdar Hospital, Thanjavur Medical College, Thanjavur, India.

Insights

Fazio Londe Syndrome, a rare neurological disorder, is linked to SLC52A3 gene mutations affecting riboflavin transport. This case highlights respiratory failure in an 11-year-old with these features.

Area of Science:

  • Neurology
  • Genetics
  • Rare Diseases

Background:

  • Fazio Londe Syndrome is a rare neurological disorder characterized by progressive bulbar palsy and respiratory failure.
  • Historically, it was considered to have a poor prognosis.

Observation:

  • A previously healthy 11-year-old child presented with acute respiratory failure.
  • The child exhibited clinical features consistent with Fazio Londe Syndrome.

Findings:

  • Genetic analysis revealed mutations in the SLC52A3 gene.
  • This gene encodes the intestinal riboflavin transporter (hRFT2), suggesting a link between riboflavin transport and the syndrome's pathogenesis.

Implications:

  • Identifies a genetic basis for Fazio Londe Syndrome in some cases, specifically mutations in SLC52A3.
  • Suggests potential therapeutic strategies targeting riboflavin metabolism or transport.
  • Highlights the importance of genetic testing in diagnosing rare neurological disorders with respiratory compromise.

Related Concept Videos

Pleiotropy01:33

Pleiotropy

Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
44.3K
Incomplete Dominance01:43

Incomplete Dominance

Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
32.9K
Lethal Alleles02:41

Lethal Alleles

Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
19.9K
Sex-linked Disorders01:43

Sex-linked Disorders

Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
112.9K
Lysosomal Hydrolases01:22

Lysosomal Hydrolases

Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
4.8K
Glucose Transporters01:27

Glucose Transporters

Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
28.5K