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Joe DeMasi
United States
Registrace 28. 08. 2011
Biology professor posting science videos explaining topics in immunology, biochemistry, molecular/cellular biology and cancer biology.
Lectin pathway of complement activation
This video presents the role of MBL (mannose-binding lectin) in initiating the lectin pathway of complement activation as well as the role of the classical C3 convertase and classical C5 convertase.
zhlédnutí: 53
Video
Classical pathway of complement activation
zhlédnutí 25Před 9 hodinami
This video covers the classical pathway of complement activation, including the roles of CRP (C-reactive protein), the complement C1 molecule, and the formation of the classical C3 convertase and classical C5 convertase.
Cytokines and their systemic effects
zhlédnutí 42Před 9 hodinami
This video introduces the systemic effects of cytokines such as TNF-alpha, IL-1, and IL-6, especially on the liver in producing acute phase proteins such as CRP (C-reactive protein) and MBL (mannose-binding lectin).
Cytokines and their local effects
zhlédnutí 24Před 9 hodinami
This video introduces the local effects of cytokines such as TNF-alpha, IL-1, IL-6, and CXCL8 that are produced by macrophages upon detecting a pathogen.
Toll-Like Receptors (TLRs) - part 1
zhlédnutí 24Před 9 hodinami
This video introduces TLRs (Toll-like receptors), and their role in immune system signaling,
Macrophages
zhlédnutí 25Před 9 hodinami
This video introduces macrophages, their locations, and receptors involved in phagocytosis,
Anaphylatoxins
zhlédnutí 34Před 14 hodinami
This video covers one of the effector functions of complement activation: the formation of anaphylatoxins C5a and C3a, their effects on cells that express C5a receptor and C3a receptor, and how that triggers inflammation and boosts the immune response.
Complement System - membrane attack complex formation
zhlédnutí 18Před 14 hodinami
One of the effector functions of complement activation is the formation of the membrane attack complex. This video covers the formation of the MAC after complement activation by the alternative pathway, covering the alternative C3 convertase and the alternative C5 convertase
Opsonization and the complement system
zhlédnutí 24Před 14 hodinami
This video covers opsonization, specifically how pathogens can become opsonized after complement fixation.
Alternative pathway of complement activation
zhlédnutí 14Před 14 hodinami
This video introduces the alternative pathway of complement activation, covering how the pathogen is recognized by complement proteins, leading to the formation of both the soluble C3 convertase and and alternative C3 convertase.
Introduction to the Complement System
zhlédnutí 36Před 14 hodinami
This video introduced the complement system, including the three different pathways complement can be activated, complement fixation, and three complement effector functions.
Location of pathogens
zhlédnutí 24Před 14 hodinami
This video introduces the different locations where pathogens can exist in relation to cells, introducing the concept of immune system proteins being able to recognize pathogens in those locations.
Introduction to immune tissues
zhlédnutí 31Před 14 dny
This video introduces the immune tissues, including primary and secondary lymphoid tissues, and structures of the lymphatic system.
Pathogens and immune system themes
zhlédnutí 53Před 14 dny
This video presents the four common types of pathogens that the immune system encounters and three themes discussed throughout learning about the immune system.
Complement introduction and activation of alternative pathway
zhlédnutí 898Před 11 měsíci
Complement introduction and activation of alternative pathway
Result of complement activation - opsonization
zhlédnutí 783Před 11 měsíci
Result of complement activation - opsonization
Types of vaccines, part 3: DNA vaccines, RNA vaccines, viral vectors
zhlédnutí 20KPřed 3 lety
Types of vaccines, part 3: DNA vaccines, RNA vaccines, viral vectors
Types of vaccines, part 1: live vaccines
zhlédnutí 21KPřed 3 lety
Types of vaccines, part 1: live vaccines
Types of vaccines, part 2: killed vaccines, subunit vaccines
zhlédnutí 12KPřed 3 lety
Types of vaccines, part 2: killed vaccines, subunit vaccines
Cell cycle regulation, part 6: Cdki regulation
zhlédnutí 1,5KPřed 3 lety
Cell cycle regulation, part 6: Cdki regulation
Cell cycle regulation, part 5: Cdk Inhibitors
zhlédnutí 3,9KPřed 3 lety
Cell cycle regulation, part 5: Cdk Inhibitors
Cell cycle regulation, part 3: cyclin D, cyclin E, and Rb
zhlédnutí 2,9KPřed 3 lety
Cell cycle regulation, part 3: cyclin D, cyclin E, and Rb
Cell cycle regulation, part 2: the Cyclin D gene
zhlédnutí 2,3KPřed 3 lety
Cell cycle regulation, part 2: the Cyclin D gene
Cell cycle regulation, part 1: Introduction
zhlédnutí 2,7KPřed 3 lety
Cell cycle regulation, part 1: Introduction
PI3K Akt pathway - part 8: Akt substrates (II of II)
zhlédnutí 1,4KPřed 3 lety
PI3K Akt pathway - part 8: Akt substrates (II of II)
PI3K Akt pathway - part 7: Akt substrates (I of II)
zhlédnutí 1,6KPřed 3 lety
PI3K Akt pathway - part 7: Akt substrates (I of II)
Please do a lecture series on porphyrias
Thank you very very much professor for these videos, your approach is a way that the first time I watched I couldn't make connections between concepts and It was unclear, after I studied more, and then watched your video, they perfectly wrapped everything I needed to know for these subjects.
Thank you for your amazing explanation! I have no background in the subject but you made it so clear ☺
You’re welcome!
Very clear explanation.
Very helpful, thank you!
Excellent!!! Superb explanation.
Sir but cip family inhibit E CDK n A CDK not D CDK
Wow, thanks. Your videos are excellent!!!
Thanks .Consice and useful
Thanks you
It’s really good
Joe you are the best, often I come back here to review it and understand it better. What became more clear this time is that once the Rb is off the transcription factor, two things can happen with a certain chance: 1.The transcription factor will encounter a new active non phosphorylated Rb. 2.The transcription factor will encounter rna polymerase and start transcription. Step 1 will become less likely once the concentration of active Rb goes down. Also what is funny is that rna polymerase itself is restricted by active Rb, so once we get a less active Rb there will come more rna polymerase available and step 2 will become more likely.
Great video! What’s the mechanism that the RNA polymerase can ignore the stop codon in the Cu to also transcribe the Cdelta segment?
I think there might be a little mistake in the somatic recombination of light chains: I think there is no deletion or inversion of DNA between the J and C segment(s), the J-C intron is transcribed and then spliced out of the mRNA transcript
Really helpful thank you !
Thanks
wow amazing explanation just subscribed! thank you for making learning free and accessible to all
Your explanations are great! You have no idea how useful these videos are, seriously thank you!!!
Thanks for the feedback! Glad to hear that it was helpful!
Sweet! This is exactly what I was looking for! Well done. Thank you!
Happy I could help!
Amazing
Great explanation. Thanks a lot for such an amazing video.😄
😊😊😊😊😊
very easy to understand, thank you!
Thank you so much. My wife has breast cancer and I am learning a lot from watching your videos. We are in the 21st century and there is science behind something other than chop and burn. Please keep making more.
Am happy
Thank you!
And are all D-type cyclin genes upregulated in cancer.
Could signalpathways PI3K/AKT/PTEN, Ras/Raf and Wnt make CCND2 upregulation ?
Thanks so much for the video! so helpful what textbook should we read to fully understand these topics?
thanks so much
thanks so much You are awesome man
9:55 What are the other signals that could make cell divide other than growth factors?
thanks so much
so if we put one single cell in a culture media without any growth factors, it won't do mitosis?
Great explanation and effective use of sketch models, you definitely know what you’re doing. Thanks for sharing! Just a question: if a mutation on a single allele were to damage the tetramerization domain, what would happen? I’d say that you’d have a reduction in overall production of p53 but the wild type tetramer would still be able to form (and it’d the only homo tetramer to actually assemble) and so in this case we would not be calling about negative dominance effect - the cell would still retain a functional p53 (at least until heterozygosis is kept). Is this correct?
Do you know some article that you can suggest me? Sir!My thesis subject is about Macropinocytosis of regulation system on cancer and the protein we will work about is SHIP2, EPS8, and DYNAMIN2 , So I need the articles and have to understand that. Sorry for my bad english
Thnks alot, Sorry, Whats the name av previous video?
What should you take to eat if you have one good pten gene and one mutated pten gene ?
Thank you so much !!! this makes so much more sense
thank youuu
amazing
Glad you liked it! Please subscribe and share!
thank youu
your videos are great and your voice is so calming. i'm cramming for a stressful exam retake and it finally seems to make sense.
Thanks! All hail hypnotoad! Another futurama fan!
Thanks a lot , This one helped me a lot
You are welcome!
Totally agree- you made this so easy to understand!
Super clear explanation! Thank you!
I can't understand how can antibody of abo attacks hla of donner
Thank you a lot,this really helped me☺️
J
Thanks, profesor🎉🎉