IJD
Indian Journal of Dermatology
  Publication of IADVL, WB
  Official organ of AADV
Indexed with Science Citation Index (E) , Web of Science and PubMed
 
Users online: 371  
Home About  Editorial Board  Current Issue Archives Online Early Coming Soon Guidelines Subscriptions  e-Alerts    Login  
    Small font sizeDefault font sizeIncrease font size Print this page Email this page


 
CASE REPORT
Year : 2006  |  Volume : 51  |  Issue : 4  |  Page : 281-282
Prenatal exclusion of lameller ichthyosis based on two novel mutations in TGM 1 gene


From the FRIGE (Foundation for Research in Genetics and Endocrinology) Genetic Centre, 20/1, Bima Nagar, Satellite, Ahmedabad - 380015, India

Correspondence Address:
Jayesh Sheth
FRIGE (Foundation for Research in Genetics and Endocrinology) Genetic Centre, 20/ 1, Bima Nagar, Satellite, Ahmedabad - 380 015, Gujarat
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0019-5154.30296

Rights and Permissions

   Abstract 

Autosomal recessive Lamellar ichthyosis (LI) is a rare condition with the birth frequency of 1:300,000. We describe two sibs of LI born to the nonconsanguineous parents. DNA was isolated from the peripheral blood and CVS were processed for mutation search in transglutaminase gene (TGM 1) has revealed parental mutation in exon 4 at nucleotide 705 (705delC) causing frame shift leading to a premature termination codon and amino acid change (K487R) in exon 10 in mother. Absence of both mutations confirmed the normal status of the fetus and delivered a normal baby at full term. Thus early prenatal diagnosis can assure the couple for a normal healthy baby.


Keywords: Lamellar ichthyosis, TGM-1, prenatal diagnosis


How to cite this article:
Sheth J, Shah S, Master D, Sheth F. Prenatal exclusion of lameller ichthyosis based on two novel mutations in TGM 1 gene. Indian J Dermatol 2006;51:281-2

How to cite this URL:
Sheth J, Shah S, Master D, Sheth F. Prenatal exclusion of lameller ichthyosis based on two novel mutations in TGM 1 gene. Indian J Dermatol [serial online] 2006 [cited 2020 Sep 25];51:281-2. Available from: http://www.e-ijd.org/text.asp?2006/51/4/281/30296



   Introduction Top


The recessive ichthyoses are a clinically heterogeneous group of disorders.[1] Lamellar ichthyosis (LI) is an autosomal recessive skin disease characterized by abnormal cornification of the epidermis. LI has an equal incidence in male and female individuals and is estimated to occur in approximately 1 per 100,000 to 300,000 live births.[2],[3]


   Case Report Top


Here we describe the case of autosomal recessive lamellar ichthyosis that was first described by Wells[4] and recently by Ozyurek et al .[2] This form of Ichthyosis is present at birth or very soon afterwards. At birth, an abnormal turning out of a part (most often eyelids) occurs in one third of the patients known as ectropion and the mouth is fixated. The infant is often enveloped in a dry, shiny, brownish yellow coating. The membrane soon breaks and thin layers of lamellar scales are peeled off. This is known as Collodion baby as has been reported in our earlier report.[5] Genetic heterogeneity in LI has been recognized with reports of two linked loci on chromosome 14q11 and 2q33-35.[6],[7],[8]

Because of its rarity, we report herewith the prenatal diagnosis of lamellar ichthyosis, which is perhaps the first report from the country.

A second child, 6-year-old, born to the nonconsanguineous parents was referred due to clinical presentation of marked, severe, generalized parchment like scales on whole body. The scales were grayish brown in the range of 5 mm to 15 mm, rectangular-shaped, loose at the ends and adherent in the center. The palms and the soles of the feet were affected by severe hyperkeratosis. The histological finding was a benign overgrowth of the prickle cell layer of the skin and ridges. Hyperkeratosis with a prominent granular cell layer and presence of keratosis noted in the follicles. A noticeable amount of perivascular infiltration in the upper dermis and increased mitotic count was observed [Figur 1]. Skin biopsy was investigated at Purpan hospital, France for immunodetection of transglutaminase 1 (TGM 1) for LI and LEKT1 for Netherton syndrome. This confirmed the clinical diagnosis of LI.

The Proband also had an elder sister with similar clinical presentation who died at the age of two years. At the time of reference, proband's mother was pregnant with 10 weeks of gestation and wanted to confirm the prenatal diagnosis of LI. Hence genomic DNA was isolated from the blood samples which were collected from an affected child, both parents and chorionic villus from the mother. Molecular study has been carried out at Purpan hospital, France for mutation analysis of TGM 1 gene.

Mutation in the TGM 1 gene on chromosome 14q11 account for approximately half the cases of LI. The TGM 1 mutations are heterogeneous including point mutations, deletions, truncations and splice-site mutations.[3],[9],[10] DNA analysis in the present family was processed for TGM 1 after immuno detection which resulted in identification of the parental mutation (705delC) in exon 4, which is present at the heterozygous state in the father and in the affected child. This mutation causes a frame shift leading to a premature termination codon. This indicates that 750delC is one of the diseases causing mutation in the family. On the other hand, an amino acid change (K487R) was observed in exon 10, which is present at the heterozygous state in the mother and in the affected child. Although we are not certain that this is the maternal disease causing mutation, however its presence in carrier mother and affected child confirms the amino acid change as a disease causing mutation in the present case. Further genotyping using different microsatellite markers from chromosome 13, 14 and 21 were analyzed, to rule out maternal contamination and also delineate the paternal and maternal contribution in the fetal DNA. Sequence analysis of DNA isolated from CVS showed absence of mutation causing LI from both parents and delivered a normal baby at full term.

To the best of our knowledge, these are the novel mutations in TGM I resulting in LI. Thus, such cumulative effort of affected family as well as clinician and researches for prenatal diagnosis illustrate the usefulness of molecular genetics in the emerging field of dermatology.


   Acknowledgment Top


Our sincere thanks to Prof. Alain Hovananian, Purpun Hospital, France to carry out mutation analysis in the present case.

 
   References Top

1.Williams ML, Elais PM. Heterogenecity in autosomal recessive ichthyosis: Clinical and biochemical differentiation in lamellar ichthyosis and non bullosa congenital ichthyosis erythroderma. Arch Dermatol 1985;121:477-88.  Back to cited text no. 1      
2.Ozyurek H, Kavak A, Alper M. lamellar ichthyosis: A case report. Turk J Pediatr 2002;44:58-60.  Back to cited text no. 2  [PUBMED]    
3.Victor F, Schaffer JV. Lamellar ichthyosis. Dermatol Online J 2005;11:13.   Back to cited text no. 3      
4.Wells RS, Kerr CB. Genetic classification of ichthyosis . Arch Derm 1965;92:1-6.  Back to cited text no. 4  [PUBMED]    
5.Multani AS, Sheth FJ, Shah VC, Chinoy NJ, Pathak S. Three siblings with Harlequin Ichthyosis in an Indian family. Early Human Development 1996;45:229-33.  Back to cited text no. 5  [PUBMED]  [FULLTEXT]  
6.Russell LJ, DiGiovanna JJ, Hashem N, Compton JG, Bale SJ. Linkage of Autosomal recessive lamellar ichthyosis to chromosome 14q. Am J Hum Genet 1994;55:1146-52.  Back to cited text no. 6  [PUBMED]    
7.Huber M, Rettler I, Bernasconi K, Wyss M, Hohl D. Lamellar ichthyosis is genetically heterogenous: Cases with normal keratinocyte transglutaminase. J Invest Dermatol 1995;105:653-4.  Back to cited text no. 7  [PUBMED]    
8.Bichakjian CK, Nair RP, Wu WW, Goldberg S, Elder JT. Prenatal exclusion of lamellar ichthyosis based on identification of two new mutations in the transglutaminase 1 gene. J Invest Dermatol 1998;110:179-82.  Back to cited text no. 8  [PUBMED]  [FULLTEXT]  
9.Candi E, Melino G, Lahm A, Ceci R, Rossi A, Kim IG, et al . Transglutaminase 1 mutations in lamellar ichthyosis. Loss of activity due to failure of activation by proteolytic processing. J Biol Chem 1998;273:13693-702.  Back to cited text no. 9      
10.Hennies HC, Kuster W, Wiebe V, Krebsova A, Reis A. Genotype/phenotype correlation in autosomal recessive lamellar ichthyosis. Am J Hum Genet 1998;62:1052-61.  Back to cited text no. 10  [PUBMED]  [FULLTEXT]  


    Figures

  [Figure - 1]



 

Top
Print this article  Email this article
 
  Search
 
   Next article
   Previous article 
   Table of Contents
  
    Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
    Article in PDF (485 KB)
    Citation Manager
    Access Statistics
    Reader Comments
    Email Alert *
    Add to My List *
* Registration required (free)  


    Abstract
    Introduction
    Case Report
    Acknowledgment
    References
    Article Figures

 Article Access Statistics
    Viewed3767    
    Printed130    
    Emailed0    
    PDF Downloaded170    
    Comments [Add]    

Recommend this journal