Potential of ethylene in alleviating cold-induced volatile esters loss of ‘Nanguo’ pears by regulating the lipoxygenase pathway

Inducing systemic resistance responses in crop plants is a promising alternative way of disease management. To understand the underlying signaling events leading to induced resistance, functional analyses of plants defective in defined signaling pathway steps are required. We used potato, one of the economically most-important crop plants worldwide, to examine systemic resistance against the devastating late blight pathogen Phytophthora infestans, induced by treatment with dl-β-aminobutyric acid (BABA). Transgenic plants impaired in either the 9-lipoxygenase pathway, which produces defense-related compounds, or the 13-lipoxygenase pathway, which generates jasmonic acid–derived signals, expressed wild-type levels of BABA-induced resistance. Plants incapable of accumulating salicylic acid (SA), on the other hand, failed to mount this type of induced resistance. Consistently, treatment of these plants with the SA analog 2,6-dichloroisonicotinic acid restored BABA-induced resistance. Together, these results demonstrate the indispensability of a functional SA pathway for systemic resistance in potato induced by BABA.

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Report of a Novel ALOX12B Mutation in Self-Improving Collodion Ichthyosis with an Overview of the Genetic Background of the Collodion Baby Phenotype

Life ◽

10.3390/life11070624 ◽

2021 ◽

Vol 11 (7) ◽

pp. 624

Author(s):

Pálma Anker ◽

Norbert Kiss ◽

István Kocsis ◽

Éva Czemmel ◽

Krisztina Becker ◽

...

Keyword(s):

Genetic Diseases ◽

Severity Index ◽

Severe Form ◽

Heterozygous Mutation ◽

Lipoxygenase Pathway ◽

Severe Condition ◽

Skin Changes ◽

Congenital Ichthyosis ◽

Autosomal Recessive Congenital Ichthyosis ◽

Collodion Baby

Collodion baby is a congenital, transient phenotype encountered in approximately 70–90% of autosomal recessive congenital ichthyosis and is an important entity of neonatal erythroderma. The clinical outcome after this severe condition is variable. Genetic mutations of components of the epidermal lipoxygenase pathway have been implicated in the majority of self-improving collodion ichthyosis (SICI). In SICI, the shedding of the collodion membrane reveals clear skin or only mild residual manifestation of ichthyosis. Here we report the case of a girl born with a severe form of collodion baby phenotype, whose skin almost completely cleared within the first month of life. At the age of 3 years, only mild symptoms of a keratinization disorder remained. However, the severity of erythema and scaling showed mild fluctuations over time. To objectively evaluate the skin changes of the patient, we assessed the ichthyosis severity index. Upon sequencing of the ALOX12B gene, we identified a previously unreported heterozygous nonsense mutation, c.1607G>A (p.Trp536Ter) with the recurrent, heterozygous mutation c.1562A>G (p.Tyr521Cys). Thereby, our findings expand the genotypic spectrum of SICI. In addition, we summarize the spectrum of further genetic diseases that can present at birth as collodion baby, in particular the SICI.

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Candidate Genes of the 5-Lipoxygenase Pathway in Acute Coronary Syndrome: A Pilot Study

Biological Research For Nursing ◽

10.1177/1099800407313385 ◽

2008 ◽

Vol 9 (4) ◽

pp. 280-292 ◽

Cited By ~ 3

Author(s):

Shu-Fen Wung ◽

Bradley E. Aouizerat

Keyword(s):

Acute Coronary Syndrome ◽

Pilot Study ◽

Nucleotide Polymorphisms ◽

Common Allele ◽

Lipoxygenase Pathway ◽

Single Nucleotide ◽

Coronary Syndrome ◽

Increased Risk ◽

Caucasian Patients ◽

Alox5ap Gene

Purpose. The purpose of this pilot study was to examine arachidonate 5-lipoxygenase (ALOX5) and ALOX5-activating protein (ALOX5AP) gene variations in patients with and without acute coronary syndrome (ACS). Methodology. Four and six single nucleotide polymorphisms spanning the ALOX5 and ALOX5AP genes, respectively, were genotyped in 19 non-Hispanic Caucasian patients with ACS and 27 controls. Results. Presence of the common allele of rs9508835 (ALOX5AP) and the minor allele of rs2029253 (ALOX5) were associated with ACS. After adjustment for age, being a carrier of the rs9508835 common allele was associated with an increased risk of ACS (odds ratio = 2.86). Relevance for nursing practice. Through the inhibition of the ALOX5AP gene by downregulation of the leukotriene pathway, the risk of ACS may be decreased in individuals that carry susceptibility allele(s). Knowledge of the genetic basis of treatments that downregulate the leukotriene pathway may prove essential to the care of individuals with ACS.

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