Survival

Kumar said:
I am not clear, what you want to tell. Pls make it simple & clear for me.
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The body's signals contain only full excitations so cancer cells do not respond. They respond to partial excitations which the body can't generate.
 
Kumar said:
I have heard that cancer cells do not obey body's signals to suicide and so they keep on growing. This should increase their life. So?
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Yes. What about it?
How some people under same exposure to any infective agent do not get same type of infection?
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What the hell are you talking about? Cancer is not an infection.
I think it was replied in this topic by some other poster.
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If it was, you didn't understand it.
Kumar said:
What do we call to our own body cells who made us & work for us?
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Cells.
Kumar said:
It was quite simple & clear.
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No.
Please tell me about life cycle of cancer cells eg. of prostate.

Please tell me life cycle of normal cells eg of prostate.
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Why? How is this relevant to any of your prior questions?

Asking random garbage is exceedingly rude and insulting to others. Do you have a point at all?
 
paximperium said:
Yes. What about it?
What the hell are you talking about? Cancer is not an infection.

If it was, you didn't understand it.
Cells.
No.

Why? How is this relevant to any of your prior questions?

Asking random garbage is exceedingly rude and insulting to others. Do you have a point at all?
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Where I am telling that cancer is an infection. Since start, we are discussing two aspects, one about pathogens(infection) other about cancer cells. Read OP again.
 
Giggywig said:
Well, sometimes the atoms get stuck with partial excitations under the right conditions of pressure and vibration. You should look it up.
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It is more technical & unclear to me. Please tell clearly.
 
Kumar said:
Where I am telling that cancer is an infection. Since start, we are discussing two aspects, one about pathogens(infection) other about cancer cells. Read OP again.
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Then be more clear in the future.
 
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If cancer cells such as the Hela line are provided with nutrients, they keep dividing and forming new cells, because they lack the "STOP" command.
This is like a computer program stuck in a GOTO loop. Eventually the computer runs out of memory and crashes. In an organism, eventually cancerous cells consume too many resources, create too many waste products, take too much space. The system fails. The organism dies, taking all the cancerous cells with it.

That's not the same thing as culturing cells in vitro.
Viruses can move from body to body, hijacking the body's own systems to produce millions of copies of the virus.
Cancerous cells can't do that, because they have no way to escape the body. When it dies, so do they.
This is why the whole world is not one huge, undifferentiated mass of cancer cells.

Instead, the world is one huge , undifferentiated mass of bacteria and viruses, with some plants and animals for variety.
 
Kumar said:
There is one thought. How cancer cells are immortal. whether they are stem cells or normal cells became cancerous which don't obey body signals to suicide? If later, can it mean that if we take our cells out of body & keep under lab culture they can also be immortal?
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No. Normal cells have a built-in expiry. After a certain number of reproductions, they die. Cancer cells don't. Hence they are kind of immortal.

About pathogens, can it be possible that few or most pathogens unless epidemic infect us due to some imbalance/instability in body-- some biochemical imbalance and that imbalance got treated due to it?
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No.

Hans
 
Once upon a time on a distant planet, the only food available was nectarines from the nectarine tree. On that planet lived geefles and gonks. The gonks were too short to reach the nectarines. The geefles had long arms to reach the nectarines, but had no articulation in their arms, so they couldn't put the nectarines into their mouths. The two species lived in a symbiotic relationship; the geefles would pick the nectarines and drop them on the gonks' heads, and the gonks would then feed half the nectarines to the geefles.

Then one day a geefle was born who had elbows. With no need to share with the gonks, the elbow-geefle ate all the tangerines it wanted, so it grew quickly and began reproducing. Soon hordes of elbow-geefles were consuming so many of the available nectarines that the normal geefles and the gonks began to starve. They declared elbow-geefles a form of cancer and began a genocidal war of annihilation. However, with their advantage of height and elbows, the elbow-geefles won the war, and soon the remaining gonks and elbow-less geefles died out.

The elbow-geefles died out a few years later, because the nectarine seeds could only germinate in gonk poop.

Cancer is kind of like that.

Respectfully,
Myriad

ETA:
Source:
 
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Kumar said:
Sorry this was left.

I have heard that cancer cells do not obey body's signals to suicide and so they keep on growing. This should increase their life. So?

How some people under same exposure to any infective agent do not get same type of infection?
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Some cancer cells indeed do not have a functioning pathway to induce cell death, others just grow faster than the cell death pathway can activate them and others again just do not trigger the cell death pathway because the body is generally incapable of determining the difference between a cancer cell and a healthy cell, as they originated from the healthy cells.
Given the sheer number of different types of cancers possible there is no way to lump them all in the same category or expect the same response. Which is why the disease is so hard to cure, the effective treatment for one type of cancer generally does nothing against all the ohter varieties.
As for immortality of cells, this is a myth. Not even bacteria are truly immortal. While certain cancer derived cell lines are capable of reproducing a lot more than normal human cells eventually they will gather too much mutations and their offspring will be inviable, even under laboratory conditions.

Your second question should be easier to understand. All humans are different and in different conditions. Someone who has a weak immune system for whatever reason will of course respond differently to the same pathogenic infection than someone with a better immune system. It also depends on what previous contact you've had and a million other things. We could fully understand it, provided we fully analyze the total genomic response of an individual the moment said individual comes in contact with a pathogen. Of course, this would mean killing said individual to obtain these data, so ethics might come into play :)
 
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