Tag Archive for: Karmanos Cancer Institute

How Can Advanced Prostate Cancer Care Barriers Be Overcome?

How Can Advanced Prostate Cancer Care Barriers Be Overcome? from Patient Empowerment Network on Vimeo.

How can barriers to advanced prostate cancer care be overcome? Expert Dr. Isaac Powell from Karmanos Cancer Institute discusses medical mistrust in the African American community and advice he gives to patients about prostate cancer screening and prevention.

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Transcript:

Lisa Hatfield:

Are there any challenges unique to minority communities that hinder access to advanced prostate cancer treatments and therapies? And do you have thoughts on how these barriers can be effectively addressed?

Dr. Isaac Powell:

I do. First of all, the diagnosis has to be made. And so that’s made by screening, by the PSA testing and digital rectal exams. Now, some people are talking about, well, we don’t need to do the digital rectal exam. That absolutely is not true. You can have a very aggressive cancer and have a normal PSA. We know that the PSA is not 100 percent accurate in diagnosing, predicting that you may have prostate cancer sometimes.

And I’ve had several patients who had normal PSAs, abnormal rectal exams, and as a result, I’m biased with them. If you don’t do the rectal exam and you have a normal PSA, you may miss aggressive cancers. So definitely have your usual rectal exam, excuse me. And once after that, if you have a biopsy, and if it is positive, then again I think that aggressive therapy is the way to go, if you’re in good shape.

Now, people are afraid of cancer. I mean, afraid of surgery. I’ve had surgery, so I can talk to them about what I’ve had and what you go through. Men are also concerned about losing their sexual function and those kinds of things related to the treatment of prostate cancer. And I can tell them that the quality of life is okay after that because we have ways of treating sexual dysfunction, the pill that everybody knows about, as well as injection and penis and ultimately the penile prosthesis. So that can be fixed.

And the other issue of losing control of the urine, that can be fixed as well. And so those are the things I tell people about not specifically among African Americans. There’s the genetic and the biology that I have to discuss, but one of the things that drives these genetic cells is obesity.

Obesity can produce these pro-inflammatory cytokines. So I always advise them to, if they are obese, to reduce their weight and their fat, particularly belly fat. That’s challenging because people have difficulty losing weight. The other thing is exercise. Exercise is a key that I think it is the most important factor in treating many health conditions, exercise. And what exercise does, and this has been studied in breast cancer, it decreases the expression of the genes that I described earlier. In terms of prior driving the cancer and breast cancer, they’ve found it decreases the pro-inflammatory cytokines. I described the tumor necrosis factors IL-6 and IL-8. So that’s important, exercise. So those are the things that I tell patients. And now in terms of advanced disease there are clinical trials that are there.

And we do these trials to decide what’s the best treatment for cancer, even though we don’t have “a cure.” Now, the problem among African Americans is that they don’t trust these clinical trials because of the abuse that African Americans have suffered through slavery and all the other kinds of things when they’ve been treated as less than human, like animals being operated on without having any anesthesia and many other abuses that have occurred. And so there’s this major distrust now that’s very difficult to eliminate in the Black community, especially if there are very few African American doctors to take care of them. So what I think that we have to fix that question of distrust, and that’s going to take a while, but I talk to them always about this mistrust issue, because I can’t see everybody, although we do need more African American doctors and nurses to take care of them and to encourage them to participate in clinical trials and to be seen as a person who is going to be taking care of them in clinical trials, that’s very important.

Often we talk about access to care, but particularly African Americans that mostly live in large cities where there is access to care. But, in terms of one particular example that’s brought up on occasion is what has occurred in Baltimore and other big cities where I talk to an African American, you know Johns Hopkins is right in the middle of the African American community. So it’s not about access again, it’s about mistrust. And I said, “Well, why don’t African Americans go to Johns Hopkins?” Well, she says, “If you walk past Johns Hopkins, they may steal your bodies.” I said, what? I didn’t believe that, but I’ve been reading literature, particularly one called the Medical Apartheid where they talked about African slavery, where they dug up the bodies of slaves to practice the anatomy.

And so that’s where this idea occurred. At night, they would dig up the bodies and do this, and not only in Baltimore, but other cities as well. So again, the mistrust issue is very difficult to resolve because of those issues. And people talk about that, well, I just don’t trust the white healthcare system, period. And don’t want to go until they’re having symptoms, and then they have no choice. They have to go. And by this time, the cancers are more advanced and cannot even prolong life expectancy in those particular patients. So I’m not sure I answered your question in terms of what a person or what I would do to activate participation in the healthcare of advanced disease.

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Do Prostate Cancer Genetics Differ in African Americans?

Do Prostate Cancer Genetics Differ in African Americans? from Patient Empowerment Network on Vimeo.

Do the genetics of prostate cancer vary in African Americans? Expert Dr. Isaac Powell from Karmanos Cancer Institute discusses what research has shown about gene expression and what occurs in the body in African Americans versus European Americans.

[ACT]IVATION TIP

“…patients need to take charge by asking questions about the therapy. Again, ‘is it going to cure me, and is the chemotherapy going to cure, immunotherapy going to cure? If not, how long do we think that I will live?’ That’s a good question, that I’d like to know if I were a patient.”

See More from [ACT]IVATED Prostate Cancer

Related Resources:

How Can Advanced Prostate Cancer Disparities Be Reduced?

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How Can Prostate Cancer Disparity Gaps Be Overcome?

Advanced Prostate Cancer Outcomes: Addressing Disparities and Exploring Solutions

Advanced Prostate Cancer Outcomes: Addressing Disparities and Exploring Solutions

Transcript:

Lisa Hatfield:

So, Dr. Powell, I just read a bit about your really impressive research, particularly with regard to the biology and genetics of prostate cancer. Can you provide an overview of your research focus on how prostate cancer impacts African Americans in comparison to other ethnic groups?

Dr. Isaac Powell:

Yes, I would certainly love to do that. In 2010, we found that the cancer grows faster among African Americans compared to European Americans. And those are the terms we use now, as opposed to Black and white. In science, we use those terms. And so at that point, I thought that this may be driven by the genetics and biology. So in 2013, we used what now has been considered the artificial intelligence.

We use bioinformatics, which is computational biology, and gene interactive and network analysis to evaluate the cancer tissue. And so at that point, we identified, and we asked the question, are there genetic differences between African Americans and European Americans? And what they found were driver genes, driver genes being the genes that drive the cancer, that make the cancers carry out a function, a mechanistic function, as opposed to passenger genes that are just associated with the cancer, just as in a car, the driver is the one that controls the car, the passenger sits there. These passenger genes, yes, they’re associated with aggressive cancer, but they have minimal or no function. The driver genes are the ones that are controlling the cancer, the function mechanism of the cancer progression. And so we identified in our analysis 21 genes that were different between African Americans compared to European Americans, different in terms of the expression of the disease, not different genes, but different expression of the genes.

What we found is that African Americans have a greater expression of inflammatory genes and transcript genes. And I’ll be more specific about that in a moment. Whereas European Americans had a higher expression of lipid metabolism genes. Those are genes that are associated with fatty acids as well as unsaturated fatty acids, specifically omega-6 as opposed to omega-3. But there is a connection between these two gene interactions at one particular molecule called tumor necrosis factor. And this gene then interacts with both the lipid metabolism genes as well as other inflammatory cytokines. And the genes that we found that were more specific in among the inflammatory genes were the pro-inflammatory cytokines, and those were IL-6 tumor necrosis factor, IL-8, and IL-1B as well as CXCR4.

These are what are called pro-inflammatory cytokines and chemokines. And they carry out functions that cause the cancers to invade. First of all, the cancer initial is cancer cells are stuck together. We call them adherent. They have to come apart before they can spread and go elsewhere. Well, these genes cause that it’s called epithelial mesenchymal transition. And once that happens, they’re capable of being transferred to distant sites such as the bone. And they also cause increased blood flow to the cancer. They also cause the oxidative stress that is driven by a molecule called reactive oxygen species.

And we’ll come back to that particular molecule because that’s important. Once it causes the oxidative stress, this causes DNA damaged repair genes to develop as well as mismatch genes. This mismatch means there are gene molecules that are stuck together, and there is an order. This order is upset by this particular oxidative stress, and those are mutated once they are repaired, and they impact on the mitochondria, which is a molecule in the cell nucleus that controls the chemistry of the cell.

And then this activates cancer stem cells, which is really important. And this is where we are going now with the cancer research. So TNF, the tumor necrosis factor IL-6 and IL-8, and the IL means interleukins. That’s what that stands for. They activate that pathway, the oxidative stress pathway. They also individually activate other pathways that lead to cancer stem cells. And I mentioned cancer stem cells because that’s the reason why chemotherapy and immunotherapy and all the drugs that we’ve used don’t work because the cancer stem cells undergo mutations and these mutations change the character of the cell. 

And that’s why the cancer cells resist that after a certain period of time, now these drugs will work and prolong survival, but they do not cure them because of the cancer stem cells. And so the cancer stem cells, in summary, are driven initially by the pro-inflammatory cytokines. So my research currently is to, well, how do we inhibit these pro-inflammatory cytokines? And that’s where we are now trying to develop a drug. We’re at the stage of mouse at this time, mouse biology and testing the drug in mice, not ready yet for human testing. So that’s where my research is headed, and I believe that that is going to work if the drug works.

Lisa Hatfield:

So just a follow-up question to that is, as a if I were a patient of yours or a family member, I might ask, so with your findings, do you think that this could lead to a cure, for example, for advanced prostate cancer?

Dr. Isaac Powell:

Yeah. I hate to use the word cure. The word I use is that we, our goal is to eliminate death from prostate cancer. That’s the term I prefer, because when we talk about cure, we have to know what causes it in order to really be certain as we are curing it. Because I don’t know whether what we’re doing is going to eliminate death, but that’s our goal. So I don’t like to use the word cure, because that’s the magic word and everybody gets excited. So I don’t want to get people excited too soon. So that’s where I am with my research.

Lisa Hatfield:

Well thank you so much for that. And do you have an activation tip for patients for this question, Dr. Powell?

Dr. Isaac Powell:

Yes. I think that, again, patients need to take charge by asking questions about the therapy. Again, is it going to cure me, and is the chemotherapy going to cure, immunotherapy going to cure? If not, how long do we think that I will live? That’s a good question, that I’d like to know if I were a patient. In fact, I’ve had prostate cancer and bladder cancer, so mine was early, so we didn’t get into those kinds of questions. But I like to know whether is this going to be something soon or later? Nobody can tell you when you may pass away from any cancer. I never give a patient any time. If they ask me, “Well, am I going to live six months or three years?” I don’t know. Because everybody’s different. Everybody responds differently to these particular treatments. So, but ask the questions as specific as possible that you’d like to know about the treatments, because there are several treatments, and there may be many answers.

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