Decreased Frequencies of Th17 and Tc17 Cells in Patients Infected with Avian Influenza A (H7N9) Virus

<div>Th17 cells were the principal sources of IL-17A among PBMCs obtained from H7N9 patients and infected with the H7N9 virus in vitro. (a) Isolated PBMCs were initially gated for lymphocytes and IL-17A+ cells, and the proportions of CD4+CD8-, CD4-CD8+, and CD4-CD8- cells were then analyzed. (b) The proportions of IL-17A+CD4+CD8- cells (Th17), IL-17A+CD4-CD8+ cells (Tc17), and IL-17A+CD4-CD8- cells from HC and H7N9 patients in the acute and recovery phases, respectively (<svg height="8.55521pt" id="M43" style="vertical-align:-0.2063904pt" version="1.1" viewbox="-0.0498162 -8.34882 34.1002 8.55521" width="34.1002pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M495 86L479 114C446 82 419 66 409 66C401 66 401 72 406 97C420 166 436 231 453 297C489 435 454 448 428 448C406 448 384 439 354 422C305 394 222 327 161 247H159L183 345C200 415 194 448 173 448C143 448 82 410 23 351L38 325C64 349 95 371 105 371C111 371 116 365 109 336L25 -4L31 -12C50 -4 77 3 107 9C119 69 132 122 145 168C197 254 321 381 370 381C387 381 393 374 378 305L329 95C309 17 320 -12 345 -12C372 -12 430 19 495 86Z"></path></g><g transform="matrix(.013,0,0,-0.013,10.158,0)"><path d="M535 323V373H52V323H535ZM535 138V188H52V138H535Z"></path></g><g transform="matrix(.013,0,0,-0.013,21.421,0)"><path d="M412 140C382 77 369 73 315 73H129L270 222C362 320 402 379 402 466C402 571 322 635 234 635C177 635 130 609 99 576L42 495L64 475C90 514 133 568 201 568C274 568 318 519 318 435C318 349 255 267 193 193C144 135 87 78 32 23V0H405C417 45 427 89 440 131L412 140Z"></path></g><g transform="matrix(.013,0,0,-0.013,27.661,0)"><path d="M241 635C89 635 35 457 35 312C35 153 89 -12 240 -12C390 -12 443 166 443 312C443 466 390 635 241 635ZM238 602C329 602 354 454 354 312C354 172 330 22 240 22C152 22 124 173 124 313S148 602 238 602Z"></path></g></svg>). (c) The proportions of IL-17A+CD4+CD8- cells (Th17), IL-17A+CD4-CD8+ cells (Tc17), and IL-17A+CD4-CD8- cells from healthy volunteers infected with the H7N9 virus in vitro at the indicated time points. <svg height="10.7395pt" id="M44" style="vertical-align:-0.6370001pt" version="1.1" viewbox="-0.0498162 -10.1025 56.4993 10.7395" width="56.4993pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0091,0,0,-0.0091,0,-5.741)"><path d="M486 158C486 177 478 202 466 220C413 228 386 236 336 262C386 288 413 297 466 304C478 323 486 347 485 366C470 376 444 381 422 380C389 338 368 319 321 288C323 345 329 372 349 422C339 442 322 461 305 470C289 461 271 442 262 422C281 372 287 345 290 288C243 319 222 338 189 380C167 381 142 376 125 366C125 347 133 322 145 304C198 296 225 288 275 262C225 236 198 227 145 220C133 201 125 177 126 158C141 148 167 143 189 144C222 186 243 205 290 236C288 179 282 152 262 102C272 82 289 63 306 54C322 63 340 82 350 102C330 152 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Journal of Immunology Research

fig5

Figure 5

Figure 5: Decreased Frequencies of Th17 and Tc17 Cells in Patients Infected with Avian Influenza A (H7N9) Virus 