Salsola kali pollen allergen (Sal k 1) (Sal k 1)

Salsola kali, commonly known as Russian thistle or tumbleweed, is a significant source of aeroallergens in arid and semi-arid regions, including the Middle East and the Southwestern United States (Assarehzadegan et al., 2009). The pollen contains several allergenic proteins, with Sal k 1, a pectin methylesterase, being the most clinically relevant major allergen responsible for sensitization in the majority of affected patients (UniProt P84358; Gadermaier et al., 2004). These proteins trigger Type I hypersensitivity reactions in sensitized individuals, leading to symptoms of allergic rhinitis, conjunctivitis, and bronchial asthma (Bousquet et al., 2001). In the context of drug development and therapy, these allergens are the primary components of allergen-specific immunotherapy (AIT) extracts. AIT aims to desensitize patients by administering gradually increasing doses of the allergen to induce immunological tolerance (Akdis & Akdis, 2014). Understanding the molecular structure of Sal k 1 and its isoforms is crucial for improving the standardization of diagnostic tests and the efficacy of therapeutic vaccines.

Other names

Russian thistle pollen allergenTumbleweed pollen allergenSal k 1Sal k 2Sal k 3Sal k 4Sal k 5Pectin methylesterase Sal k 1

Allergen-specific immunotherapy (AIT) utilizes the allergen to induce immunological tolerance by shifting the immune response from a Th2-dominated profile to a Th1/Treg profile, increasing the production of IL-10 and TGF-beta, and stimulating the production of allergen-specific IgG4 antibodies that compete with IgE for allergen binding (Akdis & Akdis, 2014; Moingeon, 2013).