PMID- 10233898 OWN - NLM STAT- MEDLINE DCOM- 19990610 LR - 20210216 IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 93 IP - 10 DP - 1999 May 15 TI - Compound-heterozygous mutations in the plasminogen gene predispose to the development of ligneous conjunctivitis. PG - 3457-66 AB - Homozygous type I plasminogen deficiency has been identified as a cause of ligneous conjunctivitis. In this study, 5 additional patients with ligneous conjunctivitis are examined. Three unrelated patients (1 boy, 1 elderly woman, and 1 man) had plasminogen antigen levels of less than 0.4, less than 0.4, and 2.4 mg/dL, respectively, but had plasminogen functional residual activity of 17%, 18%, and 17%, respectively. These subjects were compound-heterozygotes for different missense mutations in the plasminogen gene: Lys19 --> Glu/Arg513 --> His, Lys19 --> Glu/Arg216 --> His, and Lys19 --> Glu/Leu128 --> Pro, respectively. The other 2 patients, a 14-year-old boy and his 19-year-old sister, who both presented with a severe course of the disease, exhibited plasminogen antigen and functional activity levels below the detection limit (<0.4 mg/dL and <5%, respectively). These subjects were compound-heterozygotes for a deletion mutation (del Lys212) and a splice site mutation in intron Q (Ex17 + 1del-g) in the plasminogen gene. These findings show that certain compound-heterozygous mutations in the plasminogen gene may be associated with ligneous conjunctivitis. Our findings also suggest that the severity of clinical symptoms of ligneous conjunctivitis and its associated complications may depend on the amount of plasminogen functional residual activity. FAU - Schuster, V AU - Schuster V AD - Children's Hospital and the Central Laboratory, University of Wurzburg, Wurzburg, Germany. Schuster@mail.uni-wuerzburg.de FAU - Seidenspinner, S AU - Seidenspinner S FAU - Zeitler, P AU - Zeitler P FAU - Escher, C AU - Escher C FAU - Pleyer, U AU - Pleyer U FAU - Bernauer, W AU - Bernauer W FAU - Stiehm, E R AU - Stiehm ER FAU - Isenberg, S AU - Isenberg S FAU - Seregard, S AU - Seregard S FAU - Olsson, T AU - Olsson T FAU - Mingers, A M AU - Mingers AM FAU - Schambeck, C AU - Schambeck C FAU - Kreth, H W AU - Kreth HW LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Blood JT - Blood JID - 7603509 RN - 9001-91-6 (Plasminogen) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Alleles MH - Amino Acid Substitution MH - Blood Coagulation Tests MH - Child, Preschool MH - Conjunctivitis/blood/*genetics/pathology MH - Exons MH - Female MH - *Genetic Predisposition to Disease MH - Heterozygote MH - Humans MH - Male MH - *Mutation MH - Mutation, Missense MH - Pedigree MH - Plasminogen/*genetics MH - Sequence Deletion EDAT- 1999/05/11 00:00 MHDA- 1999/05/11 00:01 CRDT- 1999/05/11 00:00 PHST- 1999/05/11 00:00 [pubmed] PHST- 1999/05/11 00:01 [medline] PHST- 1999/05/11 00:00 [entrez] AID - S0006-4971(20)59576-1 [pii] PST - ppublish SO - Blood. 1999 May 15;93(10):3457-66.