Articles, Blog

Killer T Cell: The Cancer Assassin

August 21, 2019

Inside all of us lurks a serial killer, a
killer whose primary function is to kill and then kill again. These are cytotoxic
T cells a specialised member of our white blood cells. They patrol our bodies
identifying and destroying virally infected and cancer cells and they do so
with remarkable precision and efficiency. There are about five million T Cells and
a teaspoon of our blood engaged in the ferocious and unrelenting battle to keep
us healthy. These amorphous blobs move around
quite rapidly pushing out there leading edge and probing their environment as
they go. When a cytotoxic T cell finds a cancer
cell, membrane protrusions rapidly explore the surface of the cell, checking for the tell-tale signs of
cancer. They kill their targets using poisonous proteins visible here in red these cytotoxic granules move down
special pathways in the cell called microtubules to the interface
between the T Cell in the cancer cell. The T cell punctures the surface of the
cancer cell and delivers its deadly cytotoxins. This is very important in our
bodies where cells are packed together as it focuses the lethal hit on the
target and minimizes collateral damage to the neighbouring healthy cells. The fate of the cancer cell is sealed.
The T cell then moves on hungry to find another victim.


  • Reply chive davis May 20, 2015 at 1:53 am

    they're quite beautiful arent they. this is not just science, but art. really amazing.

  • Reply M C May 20, 2015 at 1:54 am

    Awwwwe so cute, I want one.

  • Reply kyle hanson May 20, 2015 at 1:58 am

    This is absolutely amazing stuff i don't know why it doesn't have more views. The human body is fascinating!

  • Reply Nadine M May 20, 2015 at 3:17 am

    awesome! Thanks nature <3 you are so perfect.

  • Reply Seahawk4Life May 20, 2015 at 3:19 am

    That's crazy. They look like they're a living organism.

  • Reply Josh Haviland May 20, 2015 at 3:34 am

    Obligatory resident evil joke here.

    Joking aside, an amazing insightful video

  • Reply Gail McGhee May 20, 2015 at 3:34 am

    This is Amazing…..finally moving past 1960!

  • Reply jjjj May 20, 2015 at 4:58 am

    How can this be used to destroy cancers?  I am particularly interested in GBM tumors of the brain.

  • Reply Attila Dr. Csáki May 20, 2015 at 7:54 am

    Amazing video! If i had to pick a favourite from our bodies' cells it definitely would be the CD8+ CT T-cell 🙂

  • Reply Raul G May 20, 2015 at 8:27 am


  • Reply Erikas Rudinskas May 20, 2015 at 8:43 am


  • Reply Rob Humphreys May 20, 2015 at 8:50 am

    It beggars the question though………If this system works so well as illustrated in this clip, then why do e get cancer in the first place? Also, what can we do to maintain our T-cells in optimal health?

  • Reply Buncha May 20, 2015 at 9:32 am

    agar. io irl

  • Reply MittenDj May 20, 2015 at 12:48 pm

    in before this becomes the T-virus at some point in the future

  • Reply Danny Keeley May 20, 2015 at 1:30 pm

    Has dye been used ?

  • Reply UninstallingWindows May 20, 2015 at 4:30 pm

    Who kills a rogue T-cell

  • Reply H A Whyte May 20, 2015 at 6:03 pm

    1 minute and 54 seconds of complete awesomeness!

  • Reply ragrappy99 May 20, 2015 at 6:08 pm HD remake confirmed

  • Reply seffard May 20, 2015 at 6:52 pm

    Holy cell!! It's spetacular how this is all works!! The video itself is amazing too!

  • Reply Messias DSantos May 20, 2015 at 7:35 pm

    vai dar tudo certo, e milhares de vidas serão salvas tenha-mos fé no mundo

  • Reply Ivon Grey May 20, 2015 at 9:16 pm

    Yeah this is kinda how the zombie Apocalypse starts, cure for cancer, months later it evolves into a full blown T-Virus turning 95% of the population into zombies or mutant, yep Resident Evil up in this bitch….

  • Reply Brandon Billeisen May 20, 2015 at 10:08 pm


  • Reply MassDynamic May 21, 2015 at 1:12 am

    so when someone develops full-blown cancer, the T Cells are on strike?

  • Reply NiCoL4x May 21, 2015 at 2:05 am

    You are mixing two kind of cells. The called Cytotoxic T cells are the TCD8+ cells. The Natural Killer cell is another type of T cell. They both kill cells, but they are not the same.

    Plus, these T cells aren't as effective for killing cancer cells as they may seem from what is said in the video. Cancer cells have adaptation methods and many T cells don't even recognise cancer cells as enemies.

  • Reply Konstantin Teslenko May 21, 2015 at 9:12 am

    nice video, thank you guys!

  • Reply Alexandra Forroll May 21, 2015 at 9:54 am

    Главное — не мешать организьме и иногда помогать 🙂 Она разберётся сама, она умеет 🙂

  • Reply Who I May 21, 2015 at 9:56 am

    Очень круто

  • Reply Телесная Психотерапия May 21, 2015 at 10:26 am

    Механизм иммунитета в случае обнаружения Т-киллером раковой клетки (на видео показаны синим) таков: мембранные "щупальца" лимфоцита проверяют подозрительную клетку.
    После такой идентификации, если клетка признается нездоровой, Т-киллер связывается с ней и вводит токсичные белки (показаны красным) в микротрубочки на ее поверхности.
    Впоследствии лимфоцит "прокалывает" эту поверхность, чем позволяет ядовитому содержимому уничтожить раковую клетку.

  • Reply silverfoils May 21, 2015 at 10:46 am

    Astounding footage.

  • Reply Алексей Олейник May 21, 2015 at 1:40 pm

    Awesome video, especially the part at 0:49 when T-cell flickers like a flame.

  • Reply Henry Lynn May 21, 2015 at 3:23 pm

    So i take it that people with cancer have ineffective T-cells or…?

  • Reply Tiltdecker May 22, 2015 at 2:30 am

    Stage 4 Non Hodgkin's T-Cell Lymphoma with CNS involvement survivor here. Very good video.

  • Reply Emperor Zaky May 22, 2015 at 5:08 am

    the GOD must be spent much time to design our body
    i love you GOD :*

  • Reply Ильдар Шайхутдинов May 22, 2015 at 7:34 am

  • Reply Navar Wolfeyes نفار ولفايز May 22, 2015 at 8:34 am

    I سبحان الله

  • Reply r0l0kcs May 22, 2015 at 6:38 pm

    I have two questions. And I hope that someone can answer me at least one of these:


    (2) Realistically how far away is science from the creation of the microbivore or something equally efficient?


  • Reply TMK Films May 23, 2015 at 7:46 am

    That's amazing!

  • Reply Muhammad Basyaruddin May 23, 2015 at 7:54 am

    Good job T killer

  • Reply Ronald de Block May 23, 2015 at 12:57 pm

    Can you imagine then what Garcinia Extra does? Scientifically proven to raise Th17 cells by 500% naturally as confirmed by Biomedical Technology Research Center (BIOTEC), Thailand.

  • Reply Adrian May 23, 2015 at 2:47 pm

    …the video doesn't actually show cancer killed by T cell isn't it… it only show half of the killing without producing the result… what if T cell couldn't kill the cancer and got eaten by cancer? LOL

  • Reply luckyea7 May 24, 2015 at 10:41 am


  • Reply Asad Rehman May 24, 2015 at 8:21 pm

    All praises are for Allah(God) the soul creator.
    The immune killer cells are truly amazing. In my experiance when i eat homeo pills to initiate an immune response i can feel the killer cells flowing around my blood. The killer cells make a hand shake with every cell and if there is a body of cancerous cells then the killer cells create a circle around the tumour and then after some minutes if there is no normal response by the cancerous cells then the immune killer cells start closing in around the tumour from all corners and break it down untill there is nothing left. And the immune cells also fix and leave behind something in place of the cells they have cleared. Truly amazing. SubhanAllah.

    We dont need chemo to kill cancer we need to instead initiate our own immune killer cells. The big pharma wont tell you this..

  • Reply LA Cleveland May 25, 2015 at 6:01 pm

    It looks gud on here but in reality t cells really don't do that much damage to cancer cells bcuz if they did no one would die from cancer and the would b no need for toxic chemotherapy that destroys the good cells along with the cancer and even then in most cases chemo still doesn't stop cancer from claiming lives

  • Reply Jeff The Ripper May 25, 2015 at 9:48 pm

    next : T Cell  VS  T Virus

  • Reply Furkan Gözükara May 26, 2015 at 12:56 pm

    science nothing but discovery of existing things, laws, mechanisms. this another time proves Allah almighty existence without a doubt.

  • Reply Soytu19 May 27, 2015 at 11:40 pm

    Yeah sure whatever, but eventually cancer cells win the battle. It's imposible for those T-cells to defeat cancer cells without our help.

  • Reply askayaska May 29, 2015 at 8:31 am

    Fantastic presentation! Killer T-cells needs to get learned from "messengers", so-called "Dendritic cells" (DC) to now what to kill, and the information is kept for a very long time even after a patient is cured. Ralph Steinmann was awarded Nobel Prize 2011 for explaining DC:s role for the immunesystem, and since then also the very first DC-vaccine, Provenge  was introduced on the market. 

    The method of producing Provenge and other DC-vaccines is very complicated and therefore expensive (around 40-45,000 usd/patient). Today there are some very promising research of other methods to "vaccinate" cancer patients.

  • Reply esmahel20042005 May 29, 2015 at 10:17 pm

    nice kill

  • Reply Cuurt Age June 2, 2015 at 12:55 pm

    Very rarely "Killer T-Cells" activate by itself, probably just 1 times in 1000. But there are ways to "learn" these cells to specificly target cancer cells as Nobel Prize winner 2011 Robert Steinmann showed us by using dendritic cells. The rule of dendritic cells is as messengers and teachers.

  • Reply Rich Hari June 22, 2015 at 12:51 am

    Awesome video! Very Thanks!

  • Reply eyes21st June 29, 2015 at 10:21 pm

    While immunotherapy (Infecting cancer cells so they can be targeted) is one of the promising fields for “truly aggressive” cancers 
    If our Immune cells targeted cancers every day – cancer cells wouldn’t stand a chance.
    Some questions about the cells used in the video
    Immune targeting (Self V’s Non-Self) 
    Were any of the cells modified to promote targeting?
    If not, as cancer cells are “Self” what do you suspect was being targeting on the cancer cell? 
    Could it be a common contamination in the cultured cancer cells used in the video, i.e. viral or mycoplasma?
    Could it be a component of the florescent stain used to label the cancer cells?

  • Reply babyHAWK630 July 29, 2015 at 6:12 am

    what happens to the killer t cell when it doesn't function properly, lets say when a patient has AIDS or developed a form of cancer? Is it the cytotoxic granules that aren't working properly or is it the killer t cells ability to recognize a defective cell?

  • Reply Irish Tactical September 17, 2015 at 4:38 pm

    Can't they just cure things like lukimeia with that

  • Reply J Evans101 October 5, 2015 at 4:17 am


  • Reply Kuya Bleck October 22, 2015 at 2:38 pm

    If we have those cells that kill cancer cells then why do most people still die of cancer and why do they still have to go through treatments?

    If somebody would answer my question i would really appreciate it

  • Reply Johanna-Hypatia Cybeleia November 22, 2015 at 2:44 am

    24 malignant cells watched this video.

  • Reply Patty Ray December 7, 2015 at 11:43 pm

    Go little T-cells, go.

  • Reply Axivate - January 3, 2016 at 8:39 am

    T cells engulf cells that have been marked by other, smaller cells. They're like heavy ordnance! Fun stuff.

  • Reply arianna St.James January 28, 2016 at 1:57 am

    is there something we can do to strengthen our t cells?

  • Reply Protector 95 February 22, 2016 at 5:20 am

    I've always wanted to weaponize killer T cells and modify them like a super cell where they're nearly indestructible and extremely lethal to cancer, and other lethal viruses and diseases. A super immune system.

  • Reply Bryand Zuluaga March 4, 2016 at 3:27 pm

    Is there a way to strengthen the t cells?

  • Reply tubbychubby1 March 12, 2016 at 10:56 pm

    why oh why does existence have to be so predatory, couldent  everyone and everything just get along. its as if the creator has a cruel streak in him/her

  • Reply Hero Sniper April 27, 2016 at 1:15 pm

    Looks like

  • Reply Julian Cechinel May 28, 2016 at 3:30 am

    "If we have those cells that kill cancer cells then why do most people still die of cancer and why do they still have to go through treatments?"

  • Reply Doğu June 4, 2016 at 11:40 am

    Why do some people not survive by getting T-cells though as the last solution to cancer?? I know someone who got T-cells to destroy cancer in the later stage but it didn't work…

  • Reply alo2acs July 16, 2016 at 5:24 am

    What's the difference between cytotoxic T-cells, killer T-cells, and natural killer T-cells?

  • Reply Robert Ostman August 22, 2016 at 5:56 am

    ok I want to see more videos like this one and not artist made representations….

  • Reply MemetosEFX January 21, 2017 at 4:26 am

    are they bad cells also?

  • Reply megzZ January 30, 2017 at 11:34 pm

    I was recently sick so for about a week my killer t-cells were doing this obviously not cancer viruses

  • Reply ruben g February 9, 2017 at 1:42 am

    So we just need to weaken or get rid of the membrane of cancer cells so the T cells can finish the job by destroying the nucleus?

  • Reply KRKRokitMan February 15, 2017 at 12:12 am

    This is the cell id like to take out for a beer

  • Reply Hideo Kuze March 9, 2017 at 4:36 am

    Can't wait for the nonbiological T-cells to hit the market soon, ill inject those suckers into my bloodstream & watch them do their job 10x better than their biological counterparts! Science is beautiful!! /s

  • Reply gone go went March 25, 2017 at 11:00 am

    0:50 amazing

  • Reply Matthew Ferrie June 29, 2017 at 11:26 pm

    Interesting! So is there a kind of chemical marker common to only cancer cells that the T cell can target?

  • Reply Itz Julfi July 24, 2017 at 12:53 pm

    even your body is better than you

  • Reply Jonathan Rios January 15, 2018 at 7:15 am

    Amazing I would love to be a scientist.

  • Reply Gamzer Man March 4, 2018 at 12:57 pm

    31 dislikes from angry cancer cells.

  • Reply Josh Wallace April 7, 2018 at 10:54 pm

    Are T-cells killed by anything?

  • Reply Hircine June 10, 2018 at 1:28 am

    unfortunately, AIDS kills such cells and destroy the Immune system

  • Reply CashOutJay June 12, 2018 at 11:42 pm

    Does this cure cancer

  • Reply myloflex June 13, 2018 at 8:26 pm

    I wonder if there’s any way to extract and multiply these cells and inject them directly into cancerous tumours and if there’s any results in doing so.

  • Reply Shiroski O'charos June 14, 2018 at 10:14 am

    Imagine if 5 billion of them on one teaspoon of your blood.

  • Reply Liliana Carossino July 13, 2018 at 5:15 am

    Wordless …. 🤤

  • Reply PJ Arcellana August 6, 2018 at 3:40 pm

    Only Transfer Factor molecules can help the T-Cells/NK cells

  • Reply Adam Moll August 12, 2018 at 7:09 am

    just came here after watching the last episode of Hataraku Saibou. So, both of NK cells and cancer cells are really a rival ,eh? Nice.

  • Reply Dimitrii August 19, 2018 at 1:06 pm

    so there is a cure for cancer

  • Reply Gogetters August 31, 2018 at 5:25 am

    Cells at Work sent me here.

  • Reply ryanEstandarte September 2, 2018 at 2:04 pm


    Hataraku Saibou Episode 3 brought me here.

  • Reply Buenomars October 1, 2018 at 12:34 pm

    Killer T has already touched that cancer cell. CLICK….BOOM!

  • Reply ?????? Loner October 1, 2018 at 8:57 pm

    T stands for being TOUGH!

  • Reply EyebrowDimension October 5, 2018 at 7:54 pm

    If T-cells kill cancer cells, then why do so many people die from it?

  • Reply אʈɲᏟʈ NATSUMI October 10, 2018 at 11:55 pm

    It’s amazing how I got here that I actually find this entertaining!

  • Reply Seren Ace November 25, 2018 at 12:13 am

    If T cells really do kill cancer cells, then why do people still die from cancer?

  • Reply News Update December 15, 2018 at 10:15 pm

    How come t-cell can kill cancer cells but can’t kill so called HIV cells?

  • Reply Michael Mccollum January 28, 2019 at 12:41 am

    So couldn't we just copy the proteins that they inject into the cancer cells and give a patient a big dose of them?

  • Reply wyattlive83 February 11, 2019 at 10:44 am


  • Reply EllOhhVeeE33 March 17, 2019 at 7:12 am

    The voice-over sounds like a serial killer like the Cytotoxic T cells

  • Reply Mr Niceguy April 2, 2019 at 5:30 pm

    I think it is remarkable how it is possible to make these processes visible these days in such detail and in 3D!

  • Reply Rain pop instagram MsCheddargetter June 5, 2019 at 9:07 pm


  • Reply Liberty4Ever June 6, 2019 at 2:23 am

    I could watch cancer cells die all day long. The only good cancer cell is a dead cancer cell. Rock on, cytotoxic T cells. Rock on.

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