A New Prostate Cancer Treatment Successfully Finished 1000 Patients Trial, Artery Embolization

TreasureVibe

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Prostate therapy without surgery: Thousands of men to benefit from new technique that uses plastic beads to block blood supply and shrink the enlarged gland
  • Successful trial in Portugal being followed up in UK with results due this year
  • If it is successful the technique could be rolled out for routine use on the NHS
  • Researchers expect it to largely replace surgery as the standard treatment
By BEN SPENCER MEDICAL CORRESPONDENT FOR THE DAILY MAIL

PUBLISHED: 05:00 BST, 8 March 2017 | UPDATED: 08:19 BST, 8 March 2017

Tens of thousands of men could benefit from a breakthrough prostate treatment announced today.

The technique uses tiny plastic beads to block the blood supply and shrink the enlarged gland – all without an operation.

A successful trial in Portugal is being followed up in Britain, with results due back later this year. If successful it could be rolled out for routine use on the NHS.

Half of all men over 50 suffer from an enlarged prostate and every year 45,000 have risky surgery to remove part of it.


As well as being painful and invasive, the operation can cause loss of sexual function and even incontinence.

3E0E704100000578-4291774-image-a-37_1488930535014.jpg


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The technique uses tiny plastic beads to block the blood supply and shrink the enlarged gland – all without an operation

Last night, researchers said they expected the new technique – prostate artery embolisation – to largely replace surgery as the standard treatment.

An enlarged prostate presses on the bladder, while also blocking the urethra. This means sufferers need to make repeated night-time trips to the toilet, often to find they cannot urinate at all.

This can lead to a build-up of toxins that cause severe kidney problems. The bead technique has been tested on 1,000 middle-aged men in Portugal.

Joao Martins Pisco, who led the study at St Louis Hospital in Lisbon, said: 'Within five years I think this will replace surgery as the standard treatment.

'Prostate artery embolisation gives men a treatment option that is less invasive than other therapies and allows them to return to their normal lives sooner.

Time and time again, I see patients who are relieved to find out about prostate artery embolisation because they are not able to tolerate medications due to their side effects.

'These men also don't want traditional surgery because it involves greater risks, has possible sexual side effects, and has a recovery time that is relatively long compared to prostate artery embolisation, which is generally performed under local anaesthesia and on an outpatient basis.'

The Portuguese team, which will present its findings at the Society of Interventional Radiology in Washington DC today, concluded the procedure is as effective as surgery and the benefits may last as long.

Half of all men over 50 suffer from an enlarged prostate and every year 45,000 have risky surgery to remove part of it

Only two patients in the seven-year trial had clinical side effects.

Performed under local anaesthetic, the procedure involves injecting hundreds of 0.2mm plastic beads into an artery in the groin.

The beads are directed with a thin tube into the blood vessels that flow to the prostate, blocking blood supply to the enlarged gland so that it shrinks.

Dr Pisco added: 'I have had nine babies born to men who were able to continue their sex lives after having the treatment.'

His team saw a 89 per cent success rate six months after surgery, 82 per cent success up to three years, and 78 per cent beyond three years.

Two hundred patients in Southampton General, Guy's Hospital in London and 16 other clinics are involved in the British trial, which is part-funded by the clinical watchdog NICE.

Dr Nigel Hacking, who is leading the study, said: 'It is very encouraging. I am always cautious about new techniques but this procedure seems to be showing promise and it seems to be safe.'

Louise de Winter of the Urology Foundation said: 'This research is very exciting.

'As the population ages these problems are going to get even more acute.'

An estimated 45,000 men undergo surgery for enlarged prostates every year in the UK.

Dr Pisco claims most of these could be replaced by prostate artery embolisation – although others say the less invasive procedure is not be suitable for all men, and many will have to continue to have surgery.

Two hundred patients in Southampton General (pictured) Guy's Hospital in London and 16 other clinics are involved in the British trial

Dr Hacking said that in his own experience, roughly 40 per cent of patients who have embolisation later have to undergo operations.

But having initial embolisation may enable them to delay that operation while retaining sexual function, and this usually means that when they do come to have an operation it is less invasive and there is a lower risk of side effects.

'Even if they do need to go back and have surgery it's a smaller operation,' he said.

Dr Hacking said it was unlikely the procedure will completely replace surgery, because it requires a highly trained interventional radiologist.

'It is a fiddly procedure and it would be potentially dangerous for someone without the skills to do it,' he said.

'But I think it may give men another option alongside surgery.'

Surgery, conducted either with a hot wire or lasers, have a high success rate - but they come with side effects which can include loss of sexual function, bleeding and incontinence.

The symptoms of enlarged prostate include a frequent need to urinate, but also difficulty starting to urinate and difficulty fully emptying a bladder.

These symptoms, however, also might be a sign of prostate cancer, so anyone in this way should be seen by a urologist.

British NHS has greenlighted the Prostatic Artery Embolization treatment:
Breakthrough prostate treatment rolled out on the NHS | Daily Mail Online (2018)
Pioneering prostate treatment for tens of thousands of men gets NHS green light (2018)


The studies:

https://www.researchgate.net/public...zation_for_Prostate_Cancer-Initial_Experience
https://www.researchgate.net/publication/321339938_Surgical_Treatment_Prostate_Artery_Embolization
https://www.researchgate.net/public...Embolization_for_Benign_Prostatic_Hyperplasia
https://www.researchgate.net/public...Prostatic_Hyperplasia_Results_in_630_Patients


See here for the studies: https://www.researchgate.net/scientific-contributions/46532827_Joao_Martins_Pisco

More sources:
Nonsurgical treatment for enlarged prostate remains effective for years


We have successful treatment using selective occlusion of veins on the one side:
Reversal Of Benign Prostate Hyperplasia By Selective Occlusion Of Impaired Venous Drainage In Males

And successful treatment using embolization of arteries on the other side:
Surgical Treatment: Prostate Artery Embolization (in a 1,000 patients trial)



Something tells me that the prostatic venous plexus and the prostatic venous drainage system have something to do with this...


From other topic What Would You Suggest For BPH Prostate Trouble?:

Prostatic venous plexus - Wikipedia

Even if there is no varicocele present, theoretically there could still be abnormalities of the prostatic venous plexus which cause proliferative problems with the prostate.
(retrograde flow of hormone-rich blood, etc.)

afp20020501p1834-f1.jpg


Finally I've found a good anatomical picture which shows all the relevant veins in a clear matter.

Source: Neurologic Complications of Prostate Cancer

Hormones cause varicose veins. Varicose veins cause back flow, bypassing of the blood, stagnant blood, leakiness of the veins etcetera. Where are hormones most frequently present? The pelvic area. So it wouldn't be such a strange idea that varicose veins cause BPH. Varicose veins that can't be seen, too. Like those of the prostatic venous plexus.

"3. The arteriosclerotic and varicose vein theory. With arteriosclerosis, or hardening of the arteries, there is a decrease in the caliber or gauge of the blood vessels to the prostate gland, which, receiving a deficient supply of blood, is thus not properly nourished. If varicose veins are present, venous stasis may be combined with deficient nourishment to bring on enlargement of the prostate.

Varicose veins of the urinary bladder are often noted in association with prostatic hypertrophy. These veins drain blood from the vesicoprostatic venous plexus. Bleeding from the prostatic capsule following prostatectomy is most often from enlarged veins. In the area of the prostatic capsule, a tight cover with a sphincter at each end, lymph and venous blood have difficulty circulating even under normal conditions. If the physiology is disturbed in any way, we should expect the development of venous and lymph stasis.

Some hemorrhoids are caused by varicose veins of the hemorrhoidal plexus. Likewise, prostatic hypertrophy may be due to varicose veins of the bladder, prostate, and rectum.

Other causes of prostatic venous stasis may be constipation and the consequent straining to move one's bowels, a prolonged upright position, lifting, habits which do not permit the frequent enough emptying of the bladder, and nervous tension (which produces bladder spasm, rectal spasm, and the retention of gas in the rectum). All of these conditions interfere with the proper venous return from the prostate gland."

Source: How to Stay Out of the Hospital

Also see: Interventional Treatment Of Benign Prostatic Hyperplasia: Embolization Of The Testicular Vein
 
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TreasureVibe

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OVERVIEW
Over 80% of patients with prostate cancer respond to androgen deprivation using drugs or surgery that marked reduce male sex hormone (testosterone) and related androgen levels from the body. Anti-androgens are a class of drugs that specifically block the entry of testosterone into cells of the body, thus preventing its biological effects. Examples of such drugs that are available on the U.S. market include flutamide (Eulexin®), bicalutamide (Casodex®) and nilutamide (Nilandron™). Cyproterone (Androcur) is another anti-androgen that is not available in the U.S.

In approximately 50% of patients whose cancer has started to grow again despite treatment that includes an antiandrogen, the cancer has been noted to regress by simply stopping the anti-androgen. This unusual response is referred to as the Anti-Androgen Withdrawal Response (AAWR). Scientists theorize that prostate cancer cells exposed to antiandrogens for a prolonged time may mutate(undergo genetic change) that paradoxically causes the anti-androgen to stimulate cancer growth.

Although more research is needed, we believe a trial of stopping the anti-androgen for a period of time is warranted in order to determine whether or not an AAWR may occur before considering other types of treatment. A review of the scientific studies that support this treatment approach follows below:

The anti-androgen withdrawal response (AAWR) may be seen, in up to 50% of patients who have PSA relapse while receiving androgen blockade. An AAWR response usually lasts 6 to 8 months, but for some patients, may last as long as 2 years.

Source: " AAWR" THE ANTI-ANDROGEN WITHDRAWAL RESPONSE


A R T I C L E


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"...simultaneous treatment of intact...rats with testosterone and estradiol-17beta for 16 weeks consistenly induced a putative precancerous lesion, termed dysplasia, in the dorsolateral prostate of all animals. Since treatment of rats with androgen alone did not elicit the same response, we concluded that estrogen played a critical role in the genesis of this proliferative lesion." Shuk-mei Ho and M. Yu, in "Selective increase in type II estrogen-binding sites in the dysplastic dorsolateral prostates of Noble rats," Cancer Research 53, 528-532, 1993.

Source: Prostate Cancer

Interesting information: Androgens (DHT, T) Treat Prostate Cancer, Especially When Combined With Vitamin D

The doctor was asked why the avodart prescription, and why "too much testosterone" is the problem when younger men have more. His answer, for the record, was that the swollen prostate provides more testosterone receptors due to its larger size, hence effectively more testosterone reaching and acting on the prostate. He is a leading urologist (spell predictor keeps wanting to say ufologist and maybe that's more accurate) so there's the official line for you. o_O

Source: Summary Of Prostate Improvements
 
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TreasureVibe

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Maybe any hormone or blend of hormones can cause cancer in the prostate, when given enough through failing veins that cause backflow. Or more compounds, perhaps secreted from the prostate itself, flow back into it and accumulate there due to failing veins.

Perhaps these prostate secretions, in combination with aforementioned blend of hormones could even cause cancer.

Function[edit]
Male sexual response[edit]

Main article: Prostate massage
During male seminal emission, sperm is transmitted from the vas deferens into the male urethra via the ejaculatory ducts, which lie within the prostate gland. Ejaculation is the expulsion of semen from the urethra. It is possible for some men to achieve orgasm solely through stimulation of the prostate gland, such as prostate massage or anal intercourse.[18][19][20]

Secretions[edit]
Prostatic secretions vary among species. They are generally composed of simple sugars and are often slightly alkaline.[21] In human prostatic secretions, the protein content is less than 1% and includes proteolytic enzymes, prostatic acid phosphatase, beta-microseminoprotein, and prostate-specific antigen. The secretions also contain zinc with a concentration 500–1,000 times the concentration in blood.

Regulation[edit]
To function properly, the prostate needs male hormones (androgens), which are responsible for male sex characteristics. The main male hormone is testosterone, which is produced mainly by the testicles. It is dihydrotestosterone (DHT), a metabolite of testosterone, that predominantly regulates the prostate.

Source: Prostate - Wikipedia

Also genes could still, as an exception perhaps, play a role in prostate cancer problems:

Gene and protein expression[edit]
Further information: Bioinformatics § Gene and protein expression
About 20,000 protein coding genes are expressed in human cells and almost 75% of these genes are expressed in the normal prostate.[22][23] About 150 of these genes are more specifically expressed in the prostate with about 20 genes being highly prostate specific.[24] The corresponding specific proteins are expressed in the glandular and secretory cells of the prostatic gland and have functions that are important for the characteristics of semen. Examples of some of the most prostate specific proteins are enzymes, such as the prostate specific antigen (PSA), and the ACPP protein.
 
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