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    cd4

    Explore "cd4" with insightful episodes like "Immune 56: Flip flops on the thymic beach with Al Singer", "TWiV 620: Antibodies and T cells in COVID-19 patients", "TWiP 176: Blood schmear", "TWiV 560: CEIRS, influenza and company" and "TWiV 489: CD4 Hunter" from podcasts like ""Immune", "This Week in Virology", "This Week in Parasitism", "This Week in Virology" and "This Week in Virology"" and more!

    Episodes (17)

    Immune 56: Flip flops on the thymic beach with Al Singer

    Immune 56: Flip flops on the thymic beach with Al Singer

    Al Singer joins immune to discuss mice that have their T cell immune system reversed, revealing the molecular basis for T cell lineage fate determination in the thymus.

    Hosts: Vincent Racaniello, Cynthia Leifer, Steph Langel, and Brianne Barker

    Guest: Al Singer

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    Music by Steve Neal.
    Immune logo image by Blausen Medical

    Send your immunology questions and comments to immune@microbe.tv

    TWiV 620: Antibodies and T cells in COVID-19 patients

    TWiV 620: Antibodies and T cells in COVID-19 patients

    Jon Yewdell returns to explain studies on detection of antibodies and T cell epitopes in patients who have recovered from COVID-19.

    Hosts: Vincent Racaniello, Rich Condit, and Brianne Barker

    Guest: Jon Yewdell

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    Intro music is by Ronald Jenkees.

    Send your virology questions and comments to twiv@microbe.tv

    TWiP 176: Blood schmear

    TWiP 176: Blood schmear

    The TWiPpers of the bite fantastic solve the case of the Indian Man Who Hiked, and discuss the effects of schistosome soluble egg antigen on infection of lymphocytes with HIV-1.

    Hosts: Vincent Racaniello, Dickson Despommier, and Daniel Griffin

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    Case Study for TWiP 176

    Recent case, woman in late 20s, schoolteacher. Outer boroughs of NYC. Wakes up on Saturday, completely rash-y, head to toe. Goes to urgent care center, say is allergic, give anti histamines and steroids. Persists after a few days, goes to allergist. Only allergen positive, dust mites. Few days later goes to GP, still itchy and rash-y. He does more thorough exam, notices she has small red lesions on fingers and between fingers. Several children in classes she is teaching has similar malady. Given therapeutic, rash goes away. Otherwise healthy, HIV negative. Partner not around at the time this develops.

    Send your case diagnosis, questions and comments to twip@microbe.tv

    Music by Ronald Jenkees

    TWiV 560: CEIRS, influenza and company

    TWiV 560: CEIRS, influenza and company

    From the meeting of the Centers of Excellence for Influenza Research and Surveillance, Vincent speaks with Alan, Florian and Jennifer about their careers, the purpose of CEIRS, universal influenza vaccines, and cellular responses to infection in pediatric populations.

    Host: Vincent Racaniello

    Guests: Alan Embry, Florian Krammer, and Jennifer Nayak

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    Intro music is by Ronald Jenkees.

    Send your virology questions and comments to twiv@microbe.tv

    TWiV 489: CD4 Hunter

    TWiV 489: CD4 Hunter

     

    Vincent visits Sandra Urdaneta-Hartmann at Drexel University College of Medicine in Philadelphia to talk about the development of the mobile video game 'CD4 Hunter'.

    Host: Vincent Racaniello

    Guest: Sandra Urdaneta-Hartmann

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    Intro music is by Ronald Jenkees.

    Send your virology questions and comments to twiv@microbe.tv

    TWiV 452: Kiss that frog

    TWiV 452: Kiss that frog

    Lynda Coughlan joins the weekly virtual bus companions for a discussion of a host defense peptide from frogs that destroys influenza virus, and mouse models for acute and chronic hepacivirus infection.

    Hosts: Vincent Racaniello, Alan Dove, and Kathy Spindler

    Guest: Lynda Coughlan

     

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    Weekly Science Picks

    Kathy - US rivers as subway map
    Lynda - No Time to Lose: A Life in Pursuit of Deadly Viruses by Peter Piot
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    - Apollo-era computers found in dead engineer’s basement
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    Listener Pick

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    Intro music is by Ronald Jenkees.

    Send your virology questions and comments to twiv@microbe.tv

    TWiP 120: When they die they calcify

    TWiP 120: When they die they calcify

    Hosts: Vincent Racaniello, Dickson Despommier, and Daniel Griffin

    The TWiP triumvirate solve the case of the Thai Woman with Facial Swelling, and explain how Th17 T cells protect against the intracellular parasite Trypanosoma cruzi.

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    This episode is sponsored by CuriosityStreama subscription streaming service that offers over 1,400 documentaries and non­fiction series from the world's best filmmakers. Get unlimited access starting at just $2.99 a month, and for our audience, the first two months are completely free if you sign up at curiositystream.com/microbe and use the promo code MICROBE.

    Case Study for TWiP 120

    A 48 yo man from Mali comes to hospital ER in Washington Heights in NY with profuse watery diarrhea. Born in Mali, came to US at 18, working in US as long haul truck driver for 30 y, frequently visits Mali, recently to attend his father’s funeral. Got symptoms one week after return (was there for 3 weeks). 3 liters diarrhea/day. No past med/surg history, not seen doctor in long time. No allergies. Unknown what father died of, Mother in Mali is ok. No medications. Some alcohol, marijuana use. Does report that has exposure to professional female sex workers, no condoms. Temp of 39 C, bp down 80/40, heart over 110, rapid breathing high 20s, cachectic. Wasted. Fungating lesion perianally. Undergoes HIV testing, clade B. T cells <100. 

    Send your case diagnosis, questions and comments to twip@microbe.tv

    TWiP 86: Worms Loa the immune response to mycobacteria

    TWiP 86: Worms Loa the immune response to mycobacteria

    Vincent, Dickson, and Daniel discuss how filarial infection modulates the immune response to mycobacterial infection, and reveal a new case study.

    Hosts: Vincent RacanielloDickson Despommier, and Daniel Griffin

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    Contact

    Send your questions and comments (email or mp3 file) to twip@twiv.tv

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    Subscribe to TWiP (free) in iTunes, by the RSS feed or by email

    TWiV 326: Giving HIV a flat tyr

    TWiV 326: Giving HIV a flat tyr

    Hosts: Vincent RacanielloAlan Dove, and Rich Condit

    The sternutating TWiVers discuss preventing infection of cells and animals by a soluble CD4-CCR5 molecule that binds to HIV-1 virus particles.

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    Weekly Science Picks

    Alan - Toms River by Dan Fagin
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    Listener Pick of the Week

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    Send your virology questions and comments (email or mp3 file) to twiv@twiv.tv

    TWiV 278: Flushing HIV down the zinc

    TWiV 278: Flushing HIV down the zinc

    Hosts: Vincent RacanielloDickson DespommierAlan Dove, and Kathy Spindler

    Vincent, Dickson, Alan, and Kathy discuss disruption of the ccr5 gene in lymphocytes of patients infected with HIV-1.

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    Send your virology questions and comments (email or mp3 file) to twiv@twiv.tv

    TWiV 266: A pathogenic vicious cycle

    TWiV 266: A pathogenic vicious cycle

    Hosts: Vincent RacanielloAlan Dove, and Kathy Spindler

    Vincent, Alan, and Kathy discuss finding viruses in outer space, varying results obtained from personal genetic testing, and depletion of CD4 cells during HIV infection by pyroptosis.

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    Weekly Science Picks

    Kathy - 17 mundane things, mind blowing views
    Alan - Snowovel
    Vincent - Public's views on human evolution

    Listener Pick of the Week

    Emily - Dengue pillow 

    Send your virology questions and comments (email or mp3 file) to twiv@twiv.tv

    Edição#22: Nova população CD4 reguladora nos ratinhos

    Edição#22: Nova população CD4 reguladora nos ratinhos
    Há as T CD4 reguladoras FOXP3, há as células Tr1, há as células Th3 e ... Num artigo publicado no volume 182 do Journal of Immunology, Han et al da República Popular da China, descreve uma nova subpopulação CD4 com fenótipo imunosupressivo. Estas células sobrerepresentadas em esplenócitos de ratinhos com tumores epiteliais implantados, expressa CD69. Estas células defínidas pelos autores como CD4+ CD69+ e CD25-, não expressam FOXP3 (associado com o fenótipo regulador das células CD4+ CD25+), não produzem citocinas de maneira relevante em repouso ou após activação não específica, não respondem a um estímulo proliferativo alogénico e sobretudo impedem a proliferação de outros linfócitos CD4 específicos de um antigénio. A acção imunosupressiva é transmitida por contacto via TGF-Beta1 presente na membrana celular e modulada pela activação de CD69 e ERK. A ler se tiverem curiosidade... PS: no podcast eu refiro o volume como 189. Peço desculpa pelo erro.

    Edição#21: Quantificação de T regs em melanoma humano.

    Edição#21: Quantificação de T regs em melanoma humano.
    Nesta edição presento-vos um artigo submetido por Jandus et al ao jornal Cancer Immunol. Immunotherapy, 2008, vol 58, pag. 1795, e onde os autores avaliam por citometria de fluxo a presença de células T reguladoras CD4+ FOXP3+ em lesões primárias de melanoma (TIL), Nódulos linfáticos metastisados (TILN) e sangue periférico. Os autores descrevem que a frequência destas células T reguladoras se encontra sobre-representada em doentes em melanoma em relação a indivíduos sem doença aparente; que TIL e TILN apresentam frequências superioes de células T reg em número superior ao sangue periférico e que finalmente, o as células T reguladoras tem um fenótipo memória expressando preferencialmente CCR7 e CD45RA Um artigo de referência pela metodologia aplicada!
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