BACKGROUND: Eosinophils are key effector cells in @entity566 and in other inflammatory diseases. Although they carry out their function in the tissues, no efficient method exists allowing for consistent purification of tissue eosinophils for culture. Rather, studies rely mainly on peripheral blood eosinophils. This study aimed to determine the most efficient protocol for purifying eosinophils from nasal polyp tissue. METHODS: Nasal @entity1127 were obtained from @entity1 undergoing surgical polypectomy. The @entity1127 were minced and enzymatically digested. Surface receptor analysis was performed by flow cytometry. In order to obtain optimal purification, the nasal polyp cell suspension was subjected to two methods of purification: 1) positive magnetic selection of @entity23427 +cells, or 2) negative selection using CD3/ @entity5750 / @entity4071 magnetic beads. Enriched tissue eosinophils were cultured with or without @entity2772 , @entity225 or @entity2841 , and their survival was evaluated by flow cytometry. RESULTS: Tissue-derived eosinophils exhibited surface expression of @entity24571 , @entity9349 , @entity45360 , @entity36010 , and @entity67124 comparable to similarly prepared eosinophils obtained from the peripheral blood of the same @entity1 . Positive selection consistently yielded eosinophils of high purity (>90%) with 63% viability. In contrast, negative selection yielded better viability (88%), reduced purity (66%), and could be utilized for in vitro activation experiments. CONCLUSION: Eosinophils can be purified from nasal @entity1127 . Negative selection appears to be advantageous due to improved viability of the eosinophils, which may be cultured and activated in vitro. This methodology is an important advance in studying tissue eosinophils for further investigations on inflammatory tissue responses.

Efficient purification of eosinophils from XXXX tissues: a comparative study.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity23427 :: ('1232', 'Gene') :: ['CCR3'] @entity9349 :: ('10666', 'Gene') :: ['DNAM-1'] @entity225 :: ('3567', 'Gene') :: ['IL-5'] @entity1127 :: ('MESH:D011127', 'Disease') :: ['polyps'] @entity5750 :: ('929', 'Gene') :: ['CD14'] @entity67124 :: ('11314', 'Gene') :: ['CD300a'] @entity566 :: ('MESH:D006967', 'Disease') :: ['allergy'] @entity45360 :: ('114836', 'Gene') :: ['NTBa'] @entity36010 :: ('51744', 'Gene') :: ['2B4'] @entity4071 :: ('2214', 'Gene') :: ['CD16'] @entity2772 :: ('3562', 'Gene') :: ['IL-3'] @entity24571 :: ('5126', 'Gene') :: ['NEC2'] @entity2841 :: ('1437', 'Gene') :: ['GM-CSF']
@entity1 :: (9606,Species) :: ['human']
