Host-Strain-Specific Responses to Pneumonia Virus of Mice Infection: A Study of Lesions, Viral Load, and Cytokine Expression
Abstract
1. Introduction
2. Material and Methods
2.1. Mice
2.2. Viral Infection
2.3. Clinical Score
2.4. Macroscopic Lesions
2.5. Microscopic Lesions
2.6. qRT-PCR
2.7. Correlation Analyses, Principal Component Analyses (PCA), and Heatmaps
3. Results
3.1. The Genetic Background of Mice Has a Significant Impact on Macroscopic Lesions
3.2. The Genetic Background of Mice Has a Significant Impact on Microscopic Lesions
3.3. The Genetic Background of Mice Has a Significant Impact on PVM Virus Replication
3.4. The Genetic Background of Mice Has a Significant Impact on Cytokine Expression
4. Discussion
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameters | Descriptions | Score |
---|---|---|
Appearance | Bright eyes, shiny and maintained coat | 0 |
Shaggy, dull coat | 1 | |
Hunched, pilo-erection, disheveled (nape) | 2 | |
Hands-off monitoring | Mouse is active, interacts with its environment | 0 |
Slight decrease in activity, less interaction | 1 | |
Pronounced decrease in activity, mouse is isolated | 2 | |
Labored breathing | 2 | |
Tremors | 2 | |
Hyperactivity or immobility | 3 | |
Discordant respiratory pattern | 6 | |
Self-harm | 6 | |
Response to external stimuli | Mouse moves away quickly | 0 |
Mouse moves slowly or reacts excessively | 1 | |
Delayed movement or reaction | 2 | |
No movement, no reaction | 6 | |
Weight | Normal | 0 |
Loss > 10% of base weight | 1 | |
Loss > 20% of base weight | 6 | |
Temperature | <36 °C | 3 |
<32 °C | 6 |
Gene | Reference | Primer1 | Primer2 | Probe |
---|---|---|---|---|
Ccl3 | Mm.PT.58.29283216 | CGATGAATTGGCGTGGAATC | CCTTGCTGTTCTTCTCTGTACC | /5SUN/ACTGCCTGC/ZEN/TGCTTCTCCTACAG/3IABkFQ/ |
Ccl5 | Mm.PT.58.43548565 | CCTCTATCCTAGCTCATCTCCA | GCTCCAATCTTGCAGTCGT | /5SUN/TCTTCTCTG/ZEN/GGTTGGCACACACTT/3IABkFQ/ |
Csf2 | Mm.PT.58.9186111 | CCTTGAGTTTGGTGAAATTGCC | GTCTCTAACGAGTTCTCCTTCA | /56-FAM/CGAATATCT/Zen/TCAGGCGGGTCTGCA/3IABkFQ/ |
Cxcl1 | Mm.PT.58.42076891 | GTGCCATCAGAGCAGTCT | CCAAACCGAAGTCATAGCCA | /56-FAM/AGGTGTCCC/Zen/CAAGTAACGGAGAAAGA/3IABkFQ/ |
Cxcl10 | Mm.PT.58.43575827 | TGATTTCAAGCTTCCCTATGGC | ATTTTCTGCCTCATCCTGCT | /56-FAM/ATCCCTCTC/Zen/GCAAGGACGGTC/3IABkFQ/ |
Cxcl2 | Mm.PT.58.10456839 | CTTTCCAGGTCAGTTAGCCTT | CAGAAGTCATAGCCACTCTCAAG | /56-FAM/CCCCCTGGT/Zen/TCAGAAAATCATCCAAAAG/3IABkFQ/ |
Gapdh | Mm.PT.39a.1 | GTGGAGTCATACTGGAACATGTAG | AATGGTGAAGGTCGGTGTG | /56-FAM/TGCAAATGG/Zen/CAGCCCTGGTG/3IABkFQ/ |
IFNβ | designed in house | AGTTACACTGCCTTTGCCATC | GTCTGCTGGTGGAGTTCATC | /56-FAM/ACAATTTCT/ZEN/CCAGCACTGGGTGGA/3IABkFQ/ |
IFNγ | Mm.PT.58.41769240 | TCCACATCTATGCCACTTGAG | CTGAGACAATGAACGCTACACA | /56-FAM/TCTTGGCTT/Zen/TGCAGCTCTTCCTCA/3IABkFQ/ |
IL-4 | Mm.PT.58.32703659 | TCTTTAGGCTTTCCAGGAAGTC | GAGCTGCAGAGACTCTTTCG | /56-FAM/AGCTGCACC/ZEN/ATGAATGAGTCCAAGT/3IABkFQ/ |
IL-10 | Mm.PT.58.13531087 | ATGGCCTTGTAGACACCTTG | GTCATCGATTTCTCCCCTGTG | /56-FAM/ATCACTCTT/Zen/CACCTGCTCCACTGC/3IABkFQ/ |
IL-12a | Mm.PT.58.13818295 | CTCTCGTTCTTGTGTAGTTCCA | ACAGATGACATGGTGAAGACG | /5SUN/TGGTTTGGT/ZEN/CCCGTGTGATGTCTT/3IABkFQ/ |
IL-1β | Mm.PT.58.41616450 | CTCTTGTTGATGTGCTGCTG | GACCTGTTCTTTGAAGTTGACG | /5SUN/TTCCAAACC/ZEN/TTTGACCTGGGCTGT/3IABkFQ/ |
IL-6 | Mm.PT.58.10005566 | TCCTTAGCCACTCCTTCTGT | AGCCAGAGTCCTTCAGAGA | /56-FAM/CCTACCCCA/Zen/ATTTCCAATGCTCTCCT/3IABkFQ/ |
IL-13 | Mm.PT.58.11338747 | GAATCCAGGGCTACACAGAAC | AACATCACACAAGACCAGACTC | /56-FAM/TCCACACTC/ZEN/CATACCATGCTGCC/3IABkFQ/ |
Rplp0 | Mm.PT.58.43894205 | CGCTTGTACCCATTGATGATG | TTATAACCCTGAAGTGCTCGAC | /56-FAM/AGGCCCTGC/Zen/ACTCTCGCTT/3IABkFQ/ |
Tnf | Mm.PT.58.12575861 | TCTTTGAGATCCATGCCGTTG | AGACCCTCACACTCAGATCA | /5SUN/CCACGTCGT/ZEN/AGCAAACCACCAAGT/3IABkFQ/ |
Lesion | Mock | D1 | D2 | D3 | D4 | D5 | D6 | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Congestion | 0.5 ±0 | 0.5 ±0 | 0.5 ±0 | 0.8 ±0.6 | 0.5 ±0.4 | 0.5 ±0.3 | 1.7 ±0.7 | 1.1 ±0.6 | 0.6 ±0.2 | 1.4 ±0.7 | 1.3 ±0.4 | 0.9 ±0.3 | 2.4 ±0.5 | 1.8 ±0.4 | 2 ±0 | 2.1 ±0.3 | 1.4 ±0.9 | 1.5 ±0.4 | 2.1 ±0.6 | 1.7 ±0.6 | 1.3 ±0.9 | |
Interstitial inflammation | 0 ±0 | 0 ±0 | 0 ±0 | 0.1 ±0.2 | 0.2 ±0.2 | 0 ±0 | 0.8 ±0.2 | 0.6 ±0.2 | 0.6 ±0.2 | 1.1 ±0.4 | 1.2 ±0.5 | 0.7 ±0.2 | 1.6 ±0.5 | 2 ±0.6 | 1 ±0 | 1.3 ±0.2 | 1 ±0.5 | 0.5 ±0 | 1.9 ±0.4 | 1.9 ±0.5 | 1 ±0 | |
Perivascular inflammation | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0.1 ±0.2 | 0.2 ±0.2 | 0.2 ±0.4 | 0.4 ±0.3 | 0.6 ±0.3 | 0.4 ±0.3 | 1.8 ±0.4 | 1.4 ±0.5 | 0 ±0 | 0.9 ±0.2 | 1.2 ±0.2 | 0.3 ±0.2 | 1.4 ±0.7 | 1.7 ±0.6 | 0.6 ±0.8 | |
Perivascular edema | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0.1 ±0.2 | 0.4 ±0.4 | 0.2 ±0.2 | 0.2 ±0.4 | 0.6 ±0.3 | 0.4 ±0.3 | 1 ±0.6 | 1.4 ±0.5 | 0 ±0 | 0.7 ±0.2 | 1.2 ±0.2 | 0.3 ±0.2 | 1.7 ±1 | 2 ±0.5 | 0.2 ±0.4 | |
Parenchymal inflammation | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0.5 ±0.4 | 0.2 ±0.2 | 0 ±0 | 0.4 ±0.5 | 1.4 ±0.8 | 0 ±0 | 1.3 ±0.2 | 1.9 ±0.5 | 0.3 ±0.2 | 1.5 ±0.6 | 1.7 ±0.6 | 0.4 ±0.5 | |
Micro hemorrhages | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0.4 ±0.3 | 0.3 ±0.4 | 0 ±0 | 0.6 ±0.5 | 1.4 ±0.8 | 0 ±0 | 1.3 ±0.2 | 1.9 ±0.5 | 0 ±0 | 1.7 ±0.7 | 1.6 ±0.6 | 0.6 ±0.8 | |
Necrosis | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0 ±0 | 0.3 ±0.4 | 0.3 ±0.4 | 0 ±0 | 0.4 ±0.5 | 1.2 ±0.7 | 0 ±0 | 1 ±0.4 | 1.9 ±0.5 | 0 ±0 | 1.3 ±0.6 | 1.6 ±0.5 | 0.4 ±0.5 | |
TOTAL | Mean | 0.5 | 0.5 | 0.5 | 0.9 | 0.7 | 0.5 | 2.7 | 2.3 | 1.6 | 4.3 | 4.5 | 2.4 | 8.2 | 10.6 | 3 | 8.6 | 10.5 | 2.9 | 11.5 | 12.1 | 4.5 |
SD | ±0 | ±0 | ±0 | ±0.6 | ±0.7 | ±0.3 | ±1.2 | ±1.2 | ±1 | ±2.7 | ±2.4 | ±1.2 | ±1.9 | ±3.9 | ±0 | ±1.4 | ±2.7 | ±0.3 | ±2.1 | ±2.9 | ±2 |
Day p.i. | PC1 | PC2 | PC1—Largest Loadings | PC2—Largest Loadings |
---|---|---|---|---|
1 | 36 | 30.7 | IL-13 (−0.95) | IL-12a (−0.51) |
CCL5 (0.20) | IL-10 (0.45) | |||
IL-10 (−0.14) | IL-4 (−0.43) | |||
2 | 52.3 | 18 | IL-10 (0.65) | IL-12a (−0.66) |
IL-4 (−0.50) | IL-1β (−0.38) | |||
IFNβ (0.45) | CCL5 (−0.34) | |||
3 | 43.8 | 18.7 | IL-10 (−0.68) | IL-12a (−0.59) |
IL-12a (0.41) | CXCL10 (−0.43) | |||
CCL5 (0.26) | IL-10 (−0.41) | |||
4 | 78.4 | 13.1 | CXCL10 (0.55) | IL-13 (−0.71) |
IFNβ (0.50) | IFNβ (0.43) | |||
IL-6 (0.35) | CXCL2 (−0.25) | |||
6 | 60 | 20.2 | IL-10 (−0.54) | IFNβ (−0.94) |
IFNγ (−0.42) | CXCL2 (−0.21) | |||
CXCL2 (0.41) | IL-10 (0.18) |
Micro. | V. load | IFNβ | CCL3 | CCL5 | CXCL1 | CXCL10 | CXCL2 | Csf2 | IL-6 | IL-1β | TNFα | IFNγ | IL-10 | IL-12a | IL-13 | IL-4 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Micro. | 1.3 × 10−18 | 6.8 × 10−3 | 5.5 × 10−5 | 1.4 × 10−2 | 6.6 × 10−12 | 3.4 × 10−12 | 1.9 × 10−5 | 2.1 × 10−1 | 2.0 × 10−10 | 4.4 × 10−9 | 2.9 × 10−10 | 1 | 1 | 9.1 × 10−3 | 1 | 1 | |
V. load | 0.839 | 4.0 × 10−6 | 7.4 × 10−5 | 7.2 × 10−3 | 6.4 × 10−15 | 2.6 × 10−18 | 3.1 × 10−5 | 1.5 × 10−2 | 5.0 × 10−14 | 3.6 × 10−8 | 8.2 × 10−14 | 1 | 1 | 1.4 × 10−2 | 1 | 1 | |
IFNβ | 0.459 | 0.598 | 4.7 × 10−4 | 5.4 × 10−4 | 8.7 × 10−2 | 1.5 × 10−12 | 2.4 × 10−2 | 1 | 6.0 × 10−1 | 2.6 × 10−3 | 7.1 × 10−8 | 1 | 1 | 1 | 1 | 1 | |
CCL3 | 0.549 | 0.544 | 0.516 | 2.2 × 10−13 | 1.8 × 10−6 | 4.6 × 10−15 | 8.5 × 10−3 | 8.7 × 10−1 | 5.3 × 10−6 | 1.3 × 10−8 | 2.9 × 10−16 | 7.5 × 10−20 | 1.3 × 10−15 | 1 | 1 | 5.3 × 10−1 | |
CCL5 | 0.435 | 0.452 | 0.514 | 0.767 | 1.1 × 10−1 | 1.4 × 10−8 | 1 | 1 | 1.7 × 10−1 | 6.0 × 10−4 | 9.0 × 10−8 | 8.2 × 10−7 | 2.4 × 10−5 | 1 | 1 | 1 | |
CXCL1 | 0.74 | 0.791 | 0.393 | 0.603 | 0.382 | 8.8 × 10−14 | 2.3 × 10−14 | 5.4 × 10−9 | 1.0 × 10−38 | 4.4 × 10−12 | 1.7 × 10−20 | 1 | 1 | 4.7 × 10−10 | 1 | 2.8 × 10−1 | |
CXCL10 | 0.746 | 0.836 | 0.759 | 0.794 | 0.665 | 0.774 | 6.5 × 10−6 | 5.1 × 10−2 | 5.9 × 10−12 | 5.8 × 10−10 | 6.8 × 10−24 | 4.4 × 10−3 | 1.7 × 10−1 | 3.0 × 10−2 | 1 | 1 | |
CXCL2 | 0.567 | 0.559 | 0.428 | 0.448 | 0.295 | 0.783 | 0.584 | 3.6 × 10−1 | 4.8 × 10−16 | 2.5 × 10−13 | 7.4 × 10−8 | 1 | 1 | 7.6 × 10−17 | 1 | 1 | |
Csf2 | 0.361 | 0.435 | 0.148 | 0.314 | 0.105 | 0.676 | 0.403 | 0.345 | 9.4 × 10−7 | 1.1 × 10−1 | 1.7 × 10−6 | 1 | 1 | 1 | 1 | 1 | |
IL-6 | 0.71 | 0.778 | 0.332 | 0.587 | 0.368 | 0.958 | 0.741 | 0.808 | 0.612 | 1.0 × 10−10 | 6.5 × 10−16 | 1 | 1 | 2.4 × 10−11 | 1 | 1.8 × 10−2 | |
IL-1β | 0.678 | 0.654 | 0.481 | 0.666 | 0.505 | 0.744 | 0.699 | 0.766 | 0.381 | 0.716 | 3.5 × 10−12 | 1.7 × 10−1 | 1 | 5.9 × 10−5 | 1 | 1 | |
TNFα | 0.709 | 0.777 | 0.656 | 0.814 | 0.646 | 0.862 | 0.891 | 0.649 | 0.607 | 0.809 | 0.749 | 5.6 × 10−3 | 1.3 × 10−1 | 1.9 × 10−3 | 1 | 1 | |
IFNγ | 0.201 | 0.146 | 0.288 | 0.853 | 0.614 | 0.232 | 0.463 | 0.148 | 0.045 | 0.222 | 0.369 | 0.461 | 7.9 × 10−56 | 1 | 1 | 1 | |
IL-10 | 0.147 | 0.068 | 0.155 | 0.802 | 0.563 | 0.167 | 0.369 | 0.066 | 0.032 | 0.165 | 0.299 | 0.38 | 0.986 | 1 | 1 | 1 | |
IL-12a | 0.449 | 0.439 | 0.192 | 0.255 | 0.252 | 0.705 | 0.42 | 0.821 | 0.295 | 0.733 | 0.551 | 0.487 | 0.01 | −0.053 | 1 | 1 | |
IL-13 | 0.197 | 0.108 | 0.054 | 0.005 | 0.002 | 0.019 | 0.071 | −0.038 | 0.024 | −0.069 | 0.156 | 0.014 | −0.012 | −0.014 | −0.140 | 1 | |
IL-4 | −0.141 | −0.204 | 0.027 | −0.334 | −0.128 | −0.355 | −0.247 | −0.259 | −0.265 | −0.433 | −0.237 | −0.313 | −0.238 | −0.254 | −0.186 | 0.181 |
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Levy, E.; Gilliaux, G.; Sarlet, M.; Desmecht, D.; Van Laere, A.-S. Host-Strain-Specific Responses to Pneumonia Virus of Mice Infection: A Study of Lesions, Viral Load, and Cytokine Expression. Viruses 2025, 17, 548. https://doi.org/10.3390/v17040548
Levy E, Gilliaux G, Sarlet M, Desmecht D, Van Laere A-S. Host-Strain-Specific Responses to Pneumonia Virus of Mice Infection: A Study of Lesions, Viral Load, and Cytokine Expression. Viruses. 2025; 17(4):548. https://doi.org/10.3390/v17040548
Chicago/Turabian StyleLevy, Etienne, Gautier Gilliaux, Michaël Sarlet, Daniel Desmecht, and Anne-Sophie Van Laere. 2025. "Host-Strain-Specific Responses to Pneumonia Virus of Mice Infection: A Study of Lesions, Viral Load, and Cytokine Expression" Viruses 17, no. 4: 548. https://doi.org/10.3390/v17040548
APA StyleLevy, E., Gilliaux, G., Sarlet, M., Desmecht, D., & Van Laere, A.-S. (2025). Host-Strain-Specific Responses to Pneumonia Virus of Mice Infection: A Study of Lesions, Viral Load, and Cytokine Expression. Viruses, 17(4), 548. https://doi.org/10.3390/v17040548