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Cd4+cd25+ Regulatory T Cells: Origin, Function and Therapeutic Potential

by B. Kyewski , Elisabeth Suri-Payer
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Current price ₹22,434.00
Original price ₹26,921.00
Original price ₹26,921.00
Original price ₹26,921.00
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₹22,434.00
Current price ₹22,434.00

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Book cover type: Hardcover
  • ISBN13: 9783540244448
  • Binding: Hardcover
  • Subject: N/A
  • Publisher: Springer
  • Publisher Imprint: Springer
  • Publication Date:
  • Pages: 332
  • Original Price: USD 219.99
  • Language: English
  • Edition: 2005
  • Item Weight: 590 grams
  • BISAC Subject(s): Immunology

The vertebrate immune system defends the organism against invading pathogens while at the same time being self-tolerant to the body's own constituentsthuspreservingitsintegrity. Multiplemechanismsactinconcert to ensure self-tolerance. During intrathymic development, the nascent T cell repertoire is purged from autoreactive T cells via negative selection, a process also known as recessive tolerance. Ridding of self-reactivity, however, isnotcomplete, asattestedbythepresenceofself-reactiveTcells intheperipheralTcellrepertoire. Hence, additionaltolerancemechanisms, collectively referred to as dominant tolerance, have been postulated on theoreticalgrounds(seethechapterbyA. Coutinhoetal. inthisvolume)and experimentalprooffortheirexistencehadbeenrepeatedlyclaimedinthepast 40years. Whilesomeoftheseclaims, largelybasedoninvitroexperiments, laterfellintodisrepute(i. e., theinfamousCD8suppressorcellsexpressingI-J molecules), concurrent, butlesswellpublicizedstringsofresearch, provided unremitting evidence for dominant tolerance mechanisms. These include the postnatal thymectomy model pioneered by Nishizuka and Sakakura in 1969, the dominant tolerance model in chicken and quail chimeras introducedbyleDouarinandcolleagues, andstudiesoninfectioustolerance by the Waldmann laboratory. A breakthrough in this ?eld was achieved by the identi?cation and isolation by Sakaguchi's and Shevach's groups of ] + aCD4 CD25 TcellsubsetexertingsuppressiononeffectorTcellsbothin vitroandinvivo. Thisinstigatedanavalancheofpublicationsonsuppressor Tcells. Whilelargelyoverlookedforsomanyyears, thereisnowhardlyany aspectofimmunitythatdoesnotseemtobeaffectedbysuppressorTcells. This volume will hardly be more than a snapshot in thisfast-moving ?eld, yetwehopethatitwillofferinspirationandorientationtothescientistwho wouldliketoenterthis?eld. To date, many different cells have been described that can suppress + + other cells of the immune system: CD4 CD25 regulatory T cells (Treg), + ? CD4 CD25 regulatory T cells, T regulatory 1 cells (Tr1), T-helper 3 cells + ? (Th3), CD8 CD28 Tcells, NKTcells, aswellastolerogenicdendriticcells. Suppressive CD4 T cells fall at least into two categories. So called natural VI Preface + + CD4 CD25 Tregformpartoftheintra-thymicallyselectedTcellrepertoire andapparentlyconstituteadistinctlineage. Incontrast,"adaptive"regulatory Tcellsareinstructedintheperipherytobecomesuppressivecells, theyform + + amoreheterogeneousgroupincludingCD4 CD25 Treg, Tr1, andTh3cells. As natural Treg are so far the best characterized entity, the ?rst three contributionsofthisvolume(C. Cozzoetal., C. -S. Hsiehetal., andL.

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