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“Differenziamento delle cellule del Sistema Immunitario"

“Differenziamento delle cellule del Sistema Immunitario"

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(SUMMARIZING)<br />

DN<br />

(≈ 60%)<br />

Riarrangiamento<br />

locus catena β<br />

DP<br />

CD4+ CD8+<br />

Riarrangiamento<br />

locus catena α<br />

+ livelli TCR<br />

Positive<br />

Selection<br />

20% ϒδ<br />

20% NK<br />

(variabilità<br />

recettoriale )<br />

SP<br />

CD4+/CD8+<br />

+ livelli TCR<br />

α β<br />

Fine maturazione<br />

(CD24, CD62L, CD69)<br />

+ ESPANSIONE<br />

In circolo sanguigno (dopo ≈ 3 settimane)<br />

Negative<br />

Selection<br />

(≈ 2%)

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