Inhibitor 1 of Protein Phosphatase 1 Regulates Ca<sup>2+</sup>/Calmodulin-Dependent Protein Kinase II to Alleviate Oxidative Stress in Hypoxia-Reoxygenation Injury of Cardiomyocytes

<div>I1PP1 overexpression regulated CaMKII activity and CaMKII<i>δ</i> alternative splicing in cardiomyocytes after H/R injury. After infection of the I1PP1 recombinant adenovirus, the cardiomyocytes were subjected to hypoxia for 4 h followed by 12 h reoxygenation. (a) Expression of p-PLB Thr17 and PLB in the cardiomyocytes was quantified by western blot. <i>β</i>-Tubulin was used as a loading control. (b–d) The mRNA levels of CaMKII<i>δ</i>A, CaMKII<i>δ</i>B, and CaMKII<i>δ</i>C in the cardiomyocytes were detected by quantitative real-time PCR. 18S was serviced as a housekeeping mRNA. 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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="M137 343C167 482 260 545 321 574C357 591 397 603 429 609L423 641C382 634 335 622 295 608C189 570 37 457 37 238C37 84 125 -12 242 -12C362 -12 447 89 447 209C447 311 374 393 267 393C247 393 226 386 204 376L137 343ZM227 337C318 337 361 256 361 173C361 105 336 22 258 22C176 22 126 120 126 240C126 266 127 291 132 310C155 323 189 337 227 337Z"></path></g></svg>.</span> Statistical significance: <svg height="10.7395pt" id="M43" style="vertical-align:-0.6370001pt" version="1.1" viewbox="-0.0498162 -10.1025 56.4993 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Oxidative Medicine and Cellular Longevity

fig4

Figure 4

Figure 4: Inhibitor 1 of Protein Phosphatase 1 Regulates Ca<sup>2+</sup>/Calmodulin-Dependent Protein Kinase II to Alleviate Oxidative Stress in Hypoxia-Reoxygenation Injury of Cardiomyocytes 

Figure 4 | Inhibitor 1 of Protein Phosphatase 1 Regulates Ca2+/Calmodulin-Dependent Protein Kinase II to Alleviate Oxidative Stress in Hypoxia-Reoxygenation Injury of Cardiomyocytes 