Whether CUL4B deficiency in mice will also result in growth and mental retardation is yet to be tested.
Despite of the improved aerosolisation caused by chitosan hydrochloride, yet retardation of chitosan coated particles in artificial mucus samples discouraged its application.
This is because growth retardation has not yet influenced growth performance of individuals.
Mutations that cause mental retardation have not yet been found in the RSK4 and SREB3 genes, but RSK4 is strong candidate MRX gene because of its similarity to RSK2, a known MRX gene, and SREB3 because of its brain-specific expression pattern.
The retardations were modest yet a distinction was observed for batches with a heterogeneous versus a homogeneous substitution pattern.
In the past the literatures on developmental neurotoxicology and on mental retardation have evolved independently, yet we know that the developing brain is a target for neurotoxicity in the developing central nervous system through many stages of pregnancy as well as during infancy and early childhood.
Systemic growth and development retardation occurs during the treatment, yet the growth rate accelerates and reaches the normal limits after the cessation of chemotherapy, which is defined as "catch-up growth".
For preterm births and intrauterine growth retardation (IUGR) the evidence as yet is insufficient to infer causality, but the available evidence justifies further studies.
EHMT1 and EHMT2 have also been linked to REST transcriptional activity through interactions with the histone demethylase JARID1c (Tahiliani et al. 2007), yet another mental retardation gene with a known role in dendritic development (Iwase et al. 2007; Jensen et al. 2005).
"This case threatens all people who are deemed incompetent whether it's due to dementia, Alzheimer's, brain injury or mental retardation," said Diane Coleman, president of Not Dead Yet, an organization in Forest Park, Ill., that opposes the right-to-die movement.
