Abstract
Background: Currently immune checkpoint pathways of PD1-PD-L1 is being used to treat lung cancer and PD-L1 served as predictive biomarker. Investigations of PD-L1 expression as a target immunotherapy in lung cancer specimens in Indonesia is needed. This study aimed to evaluate PD-L1 expression in resected lung cancer specimens using immunohistochemistry techniques.
Methods: Thirty surgically resected sample from lung cancer patients were obtained. The whole specimens were stained by using immunohistochemistry techniques automatically in BOND-MAX Autostainner (Leica, Germany). PD-L1 polyclonal antibody (Genetex) at 1:1500 dilution was applied to immunohistochemistry staining procedure. Clinicopathological characteristic were acquired from the hospital registry database.
Result: A total of 30 surgical specimens were assessed from lung cancer patients. Twenty-four (80%) of them were Adenocarcinoma (AC), 1 (3, 33%) Adenosquamous carcinoma, 2 (6, 67%) were Squamous Cell Carcinoma (SSC), 1 (3, 33%) were Large Cell Carcinoma, 1 (3, 33%) were Neuroendocrine Carcinoma, 1 (3, 33%) were Adenoid Cyctic Carcinoma. The expression of PDL-1 positive reactivity was 16 of 30 (53.3%) specimens and we categorized into strong positivity (>50%), medium (= 50%) and low positivity (<50) from 21 specimens, 0 specimens and 7 specimens respectively.
Conclusion: PD-L1 expression could be detected in lung cancer specimen using polyclonal antibody.
Methods: Thirty surgically resected sample from lung cancer patients were obtained. The whole specimens were stained by using immunohistochemistry techniques automatically in BOND-MAX Autostainner (Leica, Germany). PD-L1 polyclonal antibody (Genetex) at 1:1500 dilution was applied to immunohistochemistry staining procedure. Clinicopathological characteristic were acquired from the hospital registry database.
Result: A total of 30 surgical specimens were assessed from lung cancer patients. Twenty-four (80%) of them were Adenocarcinoma (AC), 1 (3, 33%) Adenosquamous carcinoma, 2 (6, 67%) were Squamous Cell Carcinoma (SSC), 1 (3, 33%) were Large Cell Carcinoma, 1 (3, 33%) were Neuroendocrine Carcinoma, 1 (3, 33%) were Adenoid Cyctic Carcinoma. The expression of PDL-1 positive reactivity was 16 of 30 (53.3%) specimens and we categorized into strong positivity (>50%), medium (= 50%) and low positivity (<50) from 21 specimens, 0 specimens and 7 specimens respectively.
Conclusion: PD-L1 expression could be detected in lung cancer specimen using polyclonal antibody.
Original language | English |
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Pages (from-to) | 136-140 |
Journal | Jurnal Respirologi Indonesia |
Volume | 42 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2022 |
Keywords
- non-small cell lung cancer
- PD-L1 expression
- polyclonal antibody