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Treatment of an infant with X-linked severe combined immunodeficiency (SCID-X1) by gene therapy in Australia

Identifieur interne : 00A375 ( Main/Exploration ); précédent : 00A374; suivant : 00A376

Treatment of an infant with X-linked severe combined immunodeficiency (SCID-X1) by gene therapy in Australia

Auteurs : Samantha L. Ginn [Australie] ; Julie A. Curtin [Australie] ; Belinda Kramer [Australie] ; Christine M. Smyth [Australie] ; Melanie Wong [Australie] ; Alyson Kakakios [Australie] ; Geoffrey B. Mccowage [Australie] ; Debbie Watson [Australie] ; Stephen I. Alexander [Australie] ; Margot Latham [Australie] ; Sharon C. Cunningham [Australie] ; Maolin Zheng [Australie] ; Linda Hobson [Australie] ; Peter B. Rowe [Australie] ; Alain Fischer [France] ; Marina Cavazzana-Calvo [France] ; Salima Hacein-Bey-Abina [France] ; Ian E. Alexander [Australie]

Source :

RBID : Pascal:05-0226209

Descripteurs français

English descriptors

Abstract

Objective: To report the outcome of gene therapy in an infant with X-linked severe combined immunodeficiency (SCID-X1), which typically causes a lack of T and natural killer (NK) cells. Design and setting: Ex-vivo culture and gene transfer procedures were performed at The Children's Hospital at Westmead, Sydney, NSW, in March 2002. Follow-up to March 2005 (36 months) is available. Patient: A 9-month-old male infant with confirmed SCID-X1 (including complete absence of T cells) with an NK+ phenotype (a less common variant of SCID-X1), and no HLA-identical sibling donor available for conventional bone marrow transplantation. Procedure: CD34+ haemopoietic progenitor cells were isolated from harvested bone marrow and cultured with cytokines to stimulate cellular replication. Cells were then genetically modified by exposure to a retrovirus vector encoding human yc (the common y chain of several interleukin receptors; mutations affecting the yc gene cause SCID-X1). Gene-modified cells (equivalent to 1.3×106 CD34+/γc+ cells/kg) were returned to the infant via a central line. Results: T cells were observed in peripheral blood 75 days after treatment, and levels increased rapidly to 0.46×109 CD3+ cells/L at 5 months. Within 2 weeks of the appearance of T cells, there was a distinct clinical improvement, with early weight gain and clearance of rotavirus from the gut. However, T-cell levels did not reach the reference range, and immune reconstitution remained incomplete. The infant failed to thrive and developed weakness, hypertonia and hyperreflexia in the legs, possibly the result of immune dysregulation. He went on to receive a bone marrow transplant from a matched unrelated donor 26 months after gene therapy. Conclusions: This is the first occasion that gene therapy has been used to treat a genetic disease in Australia. Only partial immunological reconstitution was achieved, most likely because of the relatively low dose of gene-corrected CD34+ cells re-infused, although viral infection during the early phase of T-cell reconstitution and the infant's NK+ phenotype may also have exerted an effect.


Affiliations:


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Le document en format XML

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<name sortKey="Watson, Debbie" sort="Watson, Debbie" uniqKey="Watson D" first="Debbie" last="Watson">Debbie Watson</name>
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<s1>Gene Therapy Research Unit, The Children's Hospital at Westmead and Children's Medical Research Unit</s1>
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<name sortKey="Latham, Margot" sort="Latham, Margot" uniqKey="Latham M" first="Margot" last="Latham">Margot Latham</name>
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<name sortKey="Zheng, Maolin" sort="Zheng, Maolin" uniqKey="Zheng M" first="Maolin" last="Zheng">Maolin Zheng</name>
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<s1>Gene Therapy Research Unit, The Children's Hospital at Westmead and Children's Medical Research Unit</s1>
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<wicri:noRegion>Sydney, NSW</wicri:noRegion>
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<name sortKey="Hobson, Linda" sort="Hobson, Linda" uniqKey="Hobson L" first="Linda" last="Hobson">Linda Hobson</name>
<affiliation wicri:level="1">
<inist:fA14 i1="01">
<s1>Gene Therapy Research Unit, The Children's Hospital at Westmead and Children's Medical Research Unit</s1>
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<author>
<name sortKey="Rowe, Peter B" sort="Rowe, Peter B" uniqKey="Rowe P" first="Peter B." last="Rowe">Peter B. Rowe</name>
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<s1>Gene Therapy Research Unit, The Children's Hospital at Westmead and Children's Medical Research Unit</s1>
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<name sortKey="Fischer, Alain" sort="Fischer, Alain" uniqKey="Fischer A" first="Alain" last="Fischer">Alain Fischer</name>
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<country>France</country>
<placeName>
<region type="region">Île-de-France</region>
<region type="old region">Île-de-France</region>
<settlement type="city">Paris</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Cavazzana Calvo, Marina" sort="Cavazzana Calvo, Marina" uniqKey="Cavazzana Calvo M" first="Marina" last="Cavazzana-Calvo">Marina Cavazzana-Calvo</name>
<affiliation wicri:level="3">
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<s1>Hôpital Necker</s1>
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<country>France</country>
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<region type="region">Île-de-France</region>
<region type="old region">Île-de-France</region>
<settlement type="city">Paris</settlement>
</placeName>
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</author>
<author>
<name sortKey="Hacein Bey Abina, Salima" sort="Hacein Bey Abina, Salima" uniqKey="Hacein Bey Abina S" first="Salima" last="Hacein-Bey-Abina">Salima Hacein-Bey-Abina</name>
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<s1>Hôpital Necker</s1>
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<country>France</country>
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<region type="region">Île-de-France</region>
<region type="old region">Île-de-France</region>
<settlement type="city">Paris</settlement>
</placeName>
</affiliation>
</author>
<author>
<name sortKey="Alexander, Ian E" sort="Alexander, Ian E" uniqKey="Alexander I" first="Ian E." last="Alexander">Ian E. Alexander</name>
<affiliation wicri:level="1">
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<s1>Gene Therapy Research Unit, The Children's Hospital at Westmead and Children's Medical Research Unit</s1>
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<country>Australie</country>
<wicri:noRegion>Sydney, NSW</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1">
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<s1>University of Sydney Department of Paediatrics and Child Health</s1>
<s3>AUS</s3>
<sZ>18 aut.</sZ>
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<country>Australie</country>
<wicri:noRegion>University of Sydney Department of Paediatrics and Child Health</wicri:noRegion>
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</analytic>
<series>
<title level="j" type="main">Medical journal of Australia</title>
<title level="j" type="abbreviated">Med. j. Aust.</title>
<idno type="ISSN">0025-729X</idno>
<imprint>
<date when="2005">2005</date>
</imprint>
</series>
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</sourceDesc>
<seriesStmt>
<title level="j" type="main">Medical journal of Australia</title>
<title level="j" type="abbreviated">Med. j. Aust.</title>
<idno type="ISSN">0025-729X</idno>
</seriesStmt>
</fileDesc>
<profileDesc>
<textClass>
<keywords scheme="KwdEn" xml:lang="en">
<term>Australia</term>
<term>Combined immune deficiency</term>
<term>Gene therapy</term>
<term>Infant</term>
<term>Severe combined immunodeficiency</term>
<term>Sex linked character</term>
<term>Treatment</term>
<term>X-Chromosome</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr">
<term>Immunodéficit combiné sévère</term>
<term>Traitement</term>
<term>Nourrisson</term>
<term>Immunodéficit mixte</term>
<term>Caractère lié au sexe</term>
<term>Chromosome X</term>
<term>Thérapie génique</term>
<term>Australie</term>
</keywords>
<keywords scheme="Wicri" type="geographic" xml:lang="fr">
<term>Australie</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">Objective: To report the outcome of gene therapy in an infant with X-linked severe combined immunodeficiency (SCID-X1), which typically causes a lack of T and natural killer (NK) cells. Design and setting: Ex-vivo culture and gene transfer procedures were performed at The Children's Hospital at Westmead, Sydney, NSW, in March 2002. Follow-up to March 2005 (36 months) is available. Patient: A 9-month-old male infant with confirmed SCID-X1 (including complete absence of T cells) with an NK+ phenotype (a less common variant of SCID-X1), and no HLA-identical sibling donor available for conventional bone marrow transplantation. Procedure: CD34+ haemopoietic progenitor cells were isolated from harvested bone marrow and cultured with cytokines to stimulate cellular replication. Cells were then genetically modified by exposure to a retrovirus vector encoding human yc (the common y chain of several interleukin receptors; mutations affecting the yc gene cause SCID-X1). Gene-modified cells (equivalent to 1.3×10
<sup>6</sup>
CD34+/γc+ cells/kg) were returned to the infant via a central line. Results: T cells were observed in peripheral blood 75 days after treatment, and levels increased rapidly to 0.46×10
<sup>9</sup>
CD3+ cells/L at 5 months. Within 2 weeks of the appearance of T cells, there was a distinct clinical improvement, with early weight gain and clearance of rotavirus from the gut. However, T-cell levels did not reach the reference range, and immune reconstitution remained incomplete. The infant failed to thrive and developed weakness, hypertonia and hyperreflexia in the legs, possibly the result of immune dysregulation. He went on to receive a bone marrow transplant from a matched unrelated donor 26 months after gene therapy. Conclusions: This is the first occasion that gene therapy has been used to treat a genetic disease in Australia. Only partial immunological reconstitution was achieved, most likely because of the relatively low dose of gene-corrected CD34+ cells re-infused, although viral infection during the early phase of T-cell reconstitution and the infant's NK+ phenotype may also have exerted an effect.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Australie</li>
<li>France</li>
</country>
<region>
<li>Île-de-France</li>
</region>
<settlement>
<li>Paris</li>
</settlement>
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<noRegion>
<name sortKey="Ginn, Samantha L" sort="Ginn, Samantha L" uniqKey="Ginn S" first="Samantha L." last="Ginn">Samantha L. Ginn</name>
</noRegion>
<name sortKey="Alexander, Ian E" sort="Alexander, Ian E" uniqKey="Alexander I" first="Ian E." last="Alexander">Ian E. Alexander</name>
<name sortKey="Alexander, Ian E" sort="Alexander, Ian E" uniqKey="Alexander I" first="Ian E." last="Alexander">Ian E. Alexander</name>
<name sortKey="Alexander, Stephen I" sort="Alexander, Stephen I" uniqKey="Alexander S" first="Stephen I." last="Alexander">Stephen I. Alexander</name>
<name sortKey="Cunningham, Sharon C" sort="Cunningham, Sharon C" uniqKey="Cunningham S" first="Sharon C." last="Cunningham">Sharon C. Cunningham</name>
<name sortKey="Curtin, Julie A" sort="Curtin, Julie A" uniqKey="Curtin J" first="Julie A." last="Curtin">Julie A. Curtin</name>
<name sortKey="Hobson, Linda" sort="Hobson, Linda" uniqKey="Hobson L" first="Linda" last="Hobson">Linda Hobson</name>
<name sortKey="Kakakios, Alyson" sort="Kakakios, Alyson" uniqKey="Kakakios A" first="Alyson" last="Kakakios">Alyson Kakakios</name>
<name sortKey="Kakakios, Alyson" sort="Kakakios, Alyson" uniqKey="Kakakios A" first="Alyson" last="Kakakios">Alyson Kakakios</name>
<name sortKey="Kramer, Belinda" sort="Kramer, Belinda" uniqKey="Kramer B" first="Belinda" last="Kramer">Belinda Kramer</name>
<name sortKey="Latham, Margot" sort="Latham, Margot" uniqKey="Latham M" first="Margot" last="Latham">Margot Latham</name>
<name sortKey="Mccowage, Geoffrey B" sort="Mccowage, Geoffrey B" uniqKey="Mccowage G" first="Geoffrey B." last="Mccowage">Geoffrey B. Mccowage</name>
<name sortKey="Rowe, Peter B" sort="Rowe, Peter B" uniqKey="Rowe P" first="Peter B." last="Rowe">Peter B. Rowe</name>
<name sortKey="Smyth, Christine M" sort="Smyth, Christine M" uniqKey="Smyth C" first="Christine M." last="Smyth">Christine M. Smyth</name>
<name sortKey="Watson, Debbie" sort="Watson, Debbie" uniqKey="Watson D" first="Debbie" last="Watson">Debbie Watson</name>
<name sortKey="Wong, Melanie" sort="Wong, Melanie" uniqKey="Wong M" first="Melanie" last="Wong">Melanie Wong</name>
<name sortKey="Zheng, Maolin" sort="Zheng, Maolin" uniqKey="Zheng M" first="Maolin" last="Zheng">Maolin Zheng</name>
</country>
<country name="France">
<region name="Île-de-France">
<name sortKey="Fischer, Alain" sort="Fischer, Alain" uniqKey="Fischer A" first="Alain" last="Fischer">Alain Fischer</name>
</region>
<name sortKey="Cavazzana Calvo, Marina" sort="Cavazzana Calvo, Marina" uniqKey="Cavazzana Calvo M" first="Marina" last="Cavazzana-Calvo">Marina Cavazzana-Calvo</name>
<name sortKey="Hacein Bey Abina, Salima" sort="Hacein Bey Abina, Salima" uniqKey="Hacein Bey Abina S" first="Salima" last="Hacein-Bey-Abina">Salima Hacein-Bey-Abina</name>
</country>
</tree>
</affiliations>
</record>

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