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Paola Izquierdo
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P1.04 - Immuno-oncology (ID 164)
- Event: WCLC 2019
- Type: Poster Viewing in the Exhibit Hall
- Track: Immuno-oncology
- Presentations: 1
- Now Available
- Moderators:
- Coordinates: 9/08/2019, 09:45 - 18:00, Exhibit Hall
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P1.04-75 - Immune-Related Adverse Events and the Neutrophil to Lymphocyte Ratio as Predictors of Clinical Response to Immunotherapy (Now Available) (ID 1969)
09:45 - 18:00 | Author(s): Paola Izquierdo
- Abstract
Background
Several immune checkpoint inhibitors (ICPis) have been approved for the treatment of non-small cell lung cancer (NSCLC). PD-L1 expression seems to correlate with activity of ICPis; however, it is not a completely accurate biomarker. Therefore, other clinical or molecular predictors of response are needed.
Method
The purpose of this study was to assess the value of immune-related adverse events (irAEs) and the neutrophil to lymphocyte ratio (NLR) in predicting response to ICPis. Furthermore, since Hispanics (H) are often not stratified in clinical trials, we sought to evaluate if incidence of irAEs and the baseline NLR were similar between H and non-Hispanic (NH) patients (pts). This was a retrospective review of 70 pts diagnosed with NSCLC and treated with ICPis at our institution between July 2014 and 2017. The electronic medical record was utilized to collect pt demographics, occurrence of irAEs, baseline NLR (categorized as < 5 or > 5), progression free survival (PFS) and overall survival (OS). The data cutoff date was March 31, 2019.
Result
The median age of the pts was 65.5 years (range 51 to 89 years). The male to female ratio was 1.2. There were 19 H and 51 NH pts. Most of the pts were treated with single agent ICPis. The irAEs positive group had increased median PFS (7.5 vs 2.1 months; p-value 0.001) and OS (14.7 vs 4.7 months; p-value 0.001) compared to the irAEs negative group. OS at 12 months was 58.1% in the irAEs positive group compared to 20.5% in the irAEs negative group (p-value 0.001). There was a non-statistically significant trend towards improved outcomes in pts with baseline NLR < 5 vs > 5. The overall incidence of irAEs was similar between H and NH pts; however, hypothyroidism was observed more frequently in H than NH pts (45% vs 20%; p-value 0.020). Baseline NLR < 5 vs > 5 was similar between H and NH pts.
Conclusion
Occurrence of irAEs might be useful in identifying potential responders to ICPis. H pts on ICPis might be at a higher risk for developing hypothyroidism. Since our total number of pts is small, these findings should be further evaluated in prospective studies.
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P2.16 - Treatment in the Real World - Support, Survivorship, Systems Research (ID 187)
- Event: WCLC 2019
- Type: Poster Viewing in the Exhibit Hall
- Track: Treatment in the Real World - Support, Survivorship, Systems Research
- Presentations: 1
- Now Available
- Moderators:
- Coordinates: 9/09/2019, 10:15 - 18:15, Exhibit Hall
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P2.16-15 - Survival and Clinical Immunotherapy Outcomes in Hispanic Patients vs Non-Hispanic White Patients with Non-Small Cell Lung Cancer (Now Available) (ID 1514)
10:15 - 18:15 | Author(s): Paola Izquierdo
- Abstract
Background
The number of Hispanic (HISP) patients (pts) enrolled in immunotherapy (IMMUNO) trials is minimal or non-existent in non-small cell lung cancer (NSCLC). It’s well known that HISP pts with NSCLC have not only a different genomic profile than Non-Hispanic Whites (NHW)- like higher expression of EGFR mutations- but also better outcomes than NHW (“Hispanic Paradox”); thus the need to validate outcomes in HISP pts treated with IMMUNO.
Method
We present data in 436 NSCLC pts treated with IMMUNO at 5 large institutions (3 in the US, 2 in Latin America). The agents evaluated include: nivolumab, pembrolizumab and atezolizumab. 256 pts were HISP and 180 pts were NHW. Most of the pts were treated with single agent therapy as second line or beyond while a small group of pts were treated as first line. The primary endpoints of the study were: response rate (ORR), progression free survival (PFS) and overall survival (OS). Secondary endpoints were disease control rate (DCR), PD-L1 expression and others.
The results are consolidated in the table below.
Hispanics (n=256)
NHW (n=180)
p value
Sex (males)
52%
45%
0.2059
ORR
First Line
35%
30%
0.6590
Second Line
18%
19%
0.3236
Adeno
22%
24%
0.6714
SQCC
24%
23%
1.0000
PDL1 (+)
29%
32%
0.4839
PDL1 (-)
5%
17%
0.3040
Disease Control Rate: ORR+SD (DCR)
Adeno
68%
67%
0.8989
SQCC
67%
46%
0.0777
Median PFS
4m
4m
0.7509
Median OS
22m
22m
0.2004
There were no statistical significant differences among HISP and NHW pts regarding ORR, DCR, PFS, OS, and responses according to PD-L1 status.
Conclusion
No significant differences were found in the clinical outcomes between these 2 ethnic groups despite the “Hispanic Paradox” and expected genomic differences; however pts with actionable mutations were excluded as they usually do not get IMMUNO as first or second line; an approach that might change after IMPOWER 150. This is the largest comparison of NSCLC immunotherapy outcomes in HISP vs NHW pts. These results are comparable to the ones seen in Checkmate and Keynote studies. As expected, higher response rates were seen in first line therapy and pts with PD-L1 (+) status. Further comparisons will be better addressed by a larger prospective study.