Objective: The aim of this study was the assessment of −308G/A tumor necrosis factor (TNF)‐α gene polymorphism and intPLA2 gene polymorphism in patients with anorexia nervosa (AN) and healthy ...controls.
Subjects: We studied 91 non‐related patients with AN and 144 healthy women (blood donors and students). The mean age of women from study group was 18.22 years (SD ± 3.13 years) and from control group was 31.71 years (SD ± 8.22).
Methods: Gene polymorphisms were studied with the use of polymerase chain reaction‐restriction fragment length polymorphism method. TNF‐α gene polymorphism consists of G/A substitution in −308 promoter region. IntPLA2 gene polymorphism is related to intron 1, in which restrictive region is found and recognized by BanI enzyme.
Results: We did not obtain statistically significant differences in the frequency of genotypes and alleles of −308G/A TNF‐α polymorphism between the study and control groups (genotypes: P = 0.106, alleles: P = 0.076). We did analogous analysis in the restrictive and bulimic subgroups. We did not observe statistically relevant differences in the frequency of genotypes (P = 0.700) and alleles (P = 0.305). We did not obtain statistically relevant difference in the frequency of genotypes and alleles of intPLA2 gene between the study group and controls (genotypes: P = 0.300, alleles: P = 0.331). We did analogous analysis in both subgroups of AN. We did not observe statistically relevant differences in the frequency of genotypes (P = 0.344) and alleles (P = 0.230).
Conclusions: There was no statistically relevant trend for the association between TNF‐α polymorphism and AN. We did not find association between studied polymorphism of intPLA2 gene and risk of AN.
An important trait of tomato is the rate of fruit ripening, strongly dependent on ethylene production. The ripening-related ethylene synthesis in tomato is controlled mainly by ...1-aminocyclopropane-1-carboxylate synthase LE-ACS2 and LE-ACS4 isoenzymes (Rottmann et al., 1991, J. Mol. Biol. 222: 937; Lincoln et al., 1993, J. Biol. Chem. 268: 19422; Barry et al., 2000, Plant Physiol. 123: 979). In spite of numerous reports on the LE-ACS2 and LE-ACS4 gene expression, only ones considered the genomic organisation each of these genes (Rottmann et al., 1991; Lincoln et al., 1993) reported one copy of each of these genes in tomato cv VF36. In this article we suggest that the genomic organisation of LE-ACS2 and LE-ACSS4 genes may depend on tomato cultivars and may differ from that described by the above authors. The results of Southern analyses of genomic DNAs from 17-day old seedlings (cultivars Jaga, Halicz, Betalux, New Yorker) imply that the genomic organisation of LE-ACS2 and LE-ACS4 genes in Polish cultivars differs from that reported for cv VF36.
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