Id |
Subject |
Object |
Predicate |
Lexical cue |
T1 |
0-84 |
Sentence |
denotes |
Macular corneal dystrophy in a Chinese family related with novel mutations of CHST6. |
T2 |
85-93 |
Sentence |
denotes |
PURPOSE: |
T3 |
94-296 |
Sentence |
denotes |
To identify mutations in the carbohydrate sulfotransferase gene (CHST6) for a Chinese family with macular corneal dystrophy (MCD) and to investigate the histopathological changes in the affected cornea. |
T4 |
297-305 |
Sentence |
denotes |
METHODS: |
T5 |
306-379 |
Sentence |
denotes |
A corneal button of the proband was obtained by penetrating keratoplasty. |
T6 |
380-553 |
Sentence |
denotes |
The half button and ultrathin sections from the other half button were examined with special stains under a light microscope (LM) and an electron microscope (EM) separately. |
T7 |
554-715 |
Sentence |
denotes |
Genomic DNA was extracted from peripheral blood of 11 family members, and the coding region of CHST6 was amplified by the polymerase chain reaction (PCR) method. |
T8 |
716-801 |
Sentence |
denotes |
The PCR products were analyzed by direct sequencing and restriction enzyme digestion. |
T9 |
802-810 |
Sentence |
denotes |
RESULTS: |
T10 |
811-942 |
Sentence |
denotes |
The positive reaction to colloidal iron stain (extracellular blue accumulations in the stroma) was detected under light microscopy. |
T11 |
943-1079 |
Sentence |
denotes |
Transmission electron microscopy revealed the enlargement of smooth endoplasmic reticulum and the presence of intracytoplasmic vacuoles. |
T12 |
1080-1194 |
Sentence |
denotes |
The compound heterozygous mutations, c.892C>T and c.1072T>C, were identified in exon 3 of CHST6 in three patients. |
T13 |
1195-1369 |
Sentence |
denotes |
The two transversions resulted in the substitution of a stop codon for glutamine at codon 298 (p.Q298X) and a missense mutation at codon 358, tyrosine to histidine (p.Y358H). |
T14 |
1370-1451 |
Sentence |
denotes |
The six unaffected family individuals carried alternative heterozygous mutations. |
T15 |
1452-1525 |
Sentence |
denotes |
These two mutations were not detected in any of the 100 control subjects. |
T16 |
1526-1538 |
Sentence |
denotes |
CONCLUSIONS: |
T17 |
1539-1740 |
Sentence |
denotes |
Those novel compound heterozygous mutations were thought to contribute to the loss of CHST6 function, which induced the abnormal metabolism of keratan sulfate (KS) that deposited in the corneal stroma. |
T18 |
1741-1895 |
Sentence |
denotes |
It could be proved by the observation of a positive stain reaction and the enlarged collagen fibers as well as hyperplastic fibroblasts under microscopes. |