Metastatic neuroendocrine cancer is not all about diarrhoea as you will see below – it’s also about digesting the food to maximize the nutrients in it. Even diarrhoea is not necessarily caused by so-called “carcinoid syndrome” (e.g. oversecreting serotonin).
Somatostatin analogues are a synthetic form of somatostatin hormone and are used to reduce the production of various hormones in the body, particularly hormones produced by tumours. The U.S. Food and Drug Administration approved three drugs, namely, octreotide, Ianreotide, and pasireotide in this drug class.
Some foods are a quicker journey from mouth to the toilet.
Yet in my case it is diarrhoea. When stomach aches increased along with mortifying diarrhoea,
This is a complex topic and consequently, as we know von Hippel-Lindau or VHL is a rare syndrome. VHL may occur in up to 10 organs of the body making you a tumour producing factory also there is a possibility of neuroendocrine cancer.VHL is a genetic form of cancer.
Neuroendocrine tumours (NET) are a group of diverse neoplasms arising from cells of neuroendocrine origin. Neuroendocrine tumours (NETs) are rare tumours that start in neuroendocrine cells.
Most NETs develop slowly over some years. They may not cause symptoms in the early stages. It’s not unusual for people to find that a NET has already spread to another part of the body when they are diagnosed.
When cancer spreads to another part of the body, it is called metastasis. Cancer cells break away from where they began (the primary tumour) and travel through the lymph system or blood.
Amino Acids
Amino – relating to, being, or containing an amine group. Amino acids are molecules that combine to form proteins. Amino acids and proteins are the building blocks of life. When proteins are digested or broken down, amino acids are left. The human body uses amino acids to make proteins which help the body (amongst other tasks) digest foods. Amino acids can also be used as a source of energy by the body.
Amines in food are chemicals that occur naturally, caused by bacteria that break down amino acids. They are related to the inorganic compound ammonia. Higher levels of amines are found in fermented, charred, grilled, overripe, over cooked or decomposing foods. Enzymes found in the human gut, liver and intestine are responsible for breaking down amines. In most people, amines are quickly broken down and cause no problems. However, if your enzymes aren’t functioning properly, amines can build up in the body which can cause allergic symptoms or intolerances in some people. Some medications including antibiotics, older types of antidepressants, and herbal and nutritional supplements can deplete enzymes.
Essential amino acids – cannot be made by the body. As a result, they must come from food, e.g. serotonin.
Nonessential amino acids – our bodies can produce the amino acids, even if we do not get them from the food we eat.
Conditional amino acids – are usually not essential, except in times of illness and stress.
Biogenic Amines – also known as Vasoactive or Pressor Amines – the NET effect
Some amines are also neurotransmitters, such as the established biogenic amine
which cause a host of chronic inflammatory conditions, including migraines.
I was always a woman lying on the couch with a migraine. Migraines have been linked to amines in food.
The most common foods that can cause migraines include
canned soup, processed meats, chocolate, olives, onions, overripe avocados, tomatoes and bananas, soy sauce, smoked and pickled foods.
Experts recommend elimination diets to find the food/s responsible for triggering migraines however it is difficult because symptoms can be delayed and foods have a cumulative effect. We recommend consulting with your doctor rather than just testing your own elimination diet.
- The neurotransmitters, are; the three catecholamines—dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline)— but also histamine and serotonin. Only histamine is found in foods. The others are generated by other sources, for example, serotonin is converted from tryptophan which is an essential amino acid.
Histamines are both produced by the body and consumed in foods.
Histamine helps with communicating messages in the brain, triggering the release of stomach acids for digestion and following an injury or allergic reaction. Histamines can make you sneeze, itch, cough and scratch. An overreaction in the body is the cause of allergic reactions that we use antihistamines to relieve.
Common symptoms include headaches, migraines, nasal congestion, hives, fatigue, nausea and vomiting. Some drugs including opioids, muscle relaxants, and alcohol cause a histamine release from immune cells.
Fish is a risky food for high histamine levels and scombroid poisoning. It occurs when the fish is not kept cold so biogenic amines form.
Fresh, canned or smoked fish may be affected particularly if it is a dark meat fish such as tuna, kahawai, mackerel, bonito, kingfish, WA salmon, sardines or blue marlin. Heating or re-cooling can’t destroy amines once they have formed.
As well as histamine, there are other biogenic amines, including tyramine, putrescine, spermine, spermidine, and cadaverine. These compounds form during microbial fermentation of food (desired or not) or food spoilage.
Classify amines as primary, secondary or tertiary depending on the number of carbon atoms bonded to the nitrogen atom.
There are several types of amines in food. Two amines that can cause health problems are phenylethylamine and tyramine.
Vasoactive is a keyword that explains the reactions some people might have when they already have raised levels of particular hormones such as catecholamines (normally pheochromocytoma/paraganglioma), serotonin (mostly midgut), and histamine (mostly foregut including lung).
Pressor amines are those which can raise your blood pressure, care should be taken where you already suffer from elevated blood pressure (hypertension). Again, this is a common side effect of those with catecholamine secreting NETs (i.e. pheochromocytoma/paraganglioma).
The effect of biogenic/vasoactive/pressor amines in ‘aged food‘. These amines are produced by bacteria during fermentation, storage or food decay.
Some biogenic amines are also hormones – It’s complicated. Obviously this is not just a serotonin problem – it is actually a much wider issue when you consider ‘vasoactive amines’ and ‘pressor amines’. They are precursors for catecholamines such as adrenaline, which trigger some NETs to secrete vasoactive substances, which cause symptoms or in extreme cases, hormonal crisis. Tyramine is the most active of these amines.
Other strongly active vasoactive amines found in food include histamine that can cause strong dilation of capillaries, and also cause hypertensive crisis. Reported reactions from these vasoactive amines are
acute hypertension, headache, palpitations, tachycardia, flushing, and in extreme cases, unconsciousness. As a general rule, tyramine and other pressor amines are usually only present in aged, fermented, spoiled protein products.
What are the trigger foods for those with ‘carcinoid syndrome’?
Most frequently reported trigger foods or habits include:
Eating larger meals
Eating high-fat meals
Drinking alcohol
Eating very spicy foods
Eating raw tomatoes
Eating foods with a high or moderate number of amines (see table).
This abbreviated list should be OK for most.
Foods High in Amines Foods Moderate in Amines
Aged cheeses—cheddar, stilton, camembert, etc.
Alcohol—all types
Smoked, salted, or pickled fish and meats
Yeast extracts and “hydrolyzed” proteins–like marmite/vegemite, or used for flavoring processed foods, brewer’s yeast, nutritional yeast
Fermented foods—tofu, miso, sauerkraut, shrimp paste, fish sauce, soy sauce
Caffeine—coffee, cola
Dark chocolate, milk chocolate, cocoa powder
Peanuts, brazil nuts, coconut
Avocado, banana, raspberries
Soyfoods—tempeh
Fava beans
Certain vegetarian meat substitutes—check the label for ingredients
Better to eat 4 to 6 smaller meals, instead of 3 larger meals.
Choose a diet higher in protein
Best choices include:
fresh fish, chicken, turkey, lean beef; beans and lentils; eggs; low-fat dairy like milk, yogurt, cottage cheese – undeerstanding about the importance of protein for NET patients – is essential
Reduce your fat intake
Which I have experienced to be beneficial for diarrhoea depressions and midnight stomach cramps.
Choose the healthiest fats, including extra virgin olive oil, nuts, seeds (if tolerable)
Cook vegetables for improved digestibility
To minimize exacerbating diarrhea, limit or avoid wheat bran and foods made with wheat bran, prunes, dried fruits, and popcorn
Experiment with foods that are lower in amines (see table)
Foods Lower in Amines
Fresh lean meats, fresh poultry, fresh fish
Most vegetables—but cooked may be better tolerated than raw
Fruits in moderate amounts—but not banana, avocado, raspberries
Grain foods, starchy foods—lower fiber or soft cooked grains may be most tolerated
Un-aged cheeses and dairy—low fat cottage cheese, ricotta cheese, mozzarella cheese; low fat yogurt or kefir; low fat cream cheese; low fat milk or low fat lactose-free milk
Fresh soyfoods—soymilk, edamame
Keeping a food and symptom diary may be helpful. Record your daily food and drink consumption and any symptoms experienced. Like I have start to notice a pattern.
One thing I would say to people is that the amines issue is quite relevant if you have an over-secreting NET where certain amines including vasoactive and pressor kind might cause reactions. In actual fact these reactions to these types of foods are not limited to NETs, anyone can have this type of reaction if eating too much of them.
The issue can be exacerbated in NET patients who have highly elevated levels of (say) serotonin with carcinoid syndrome, and with certain other hormonal syndromes such as catecholamine secreting Pheochromocytoma/ Paraganglioma.
For those who are experiencing digestive issues, are non-syndromic but who have had surgery and /or other therapies, amines might be less of an issue (other than when being tested for 5HIAA) and you may need more focus on other dietary guidance, e.g. if you have had bowel surgery, low and high ‘residue’ foodstuffs (i.e. essentially easy to digest, normal correlates to low and high fibre) may be something to prescribe but they are normally only a temporary solution allowing the bowel to heal gently.
One study revealed about 30% of adult women in the U.S have thyroid nodules that can be diagnosed with ultrasound, making it the most common endocrine problem in the country. Thyroid nodules are abnormal growths in your thyroid gland. You could have one or several nodules and it could either be full of liquid or blood. About 10% of cases are cancerous. It is estimated that women are susceptible to thyroid nodules four times more than men.
Sometimes the tissues of the thyroid gland can get cancerous, forming thyroid cancer. The symptoms are usually a lump in the neck, trouble swallowing or breathing, constant cough or a hoarse voice. If caught early, it can be treated successfully.
A 34-year-old woman was found to have a primary NEN of the brain, and she had recurrence with identical histology 10 years later. Extracranial NENs were excluded. She had routine surveillance for the first 5 years with MRIs and positron emission tomography/CTs after the initial presentation which was treated with radiation followed by cisplatin and etoposide.
the medical records, computed tomography (CT) of magnetic resonance imaging (MRI) of 105 patients with secondary brain tumors. The metastatic lesions noted on CT scans of MRI ere matched with a predetermined standard sheet containing axial images with shading on the border zones. To be included in the border zones, the center on more than 50% of the lesion had to be situated within these zones.
The results demonstrated that brain metastasis occurs in the vascular border zone regions and the gray and white matter junction more frequently than previously recognized, and also supported the notion that metastatic emboli tend to lodge in an area of sudden reduction of vascular caliber (gray/white matter junction) and in the area most distal vascular field (border zone).
Octreotide is a synthetic octapeptide analog of somatostatin. It binds to somatostatin receptors (SSTR) subtypes 2 and 3 found in the pancreas and subtype 5 found in the intestine and inhibits the blood flow, gastric secretions, splanchnic hemodynamics, pancreatic secretions, intestinal motility, and all gastroenteropancreatic (GEP) endocrine secretions; suppresses luteinizing hormone response to gonadotropin-releasing hormone secretion, and decreases growth hormone (GH) and insulin-like growth factor 1 (IGF-I). It is used to treat acromegaly, diarrhea, variceal bleeding, and GEP neuroendocrine tumors.
Lanreotide is a synthetic octapeptide analog of somatostatin that works by binding specifically to SSTR-2 and SSTR-5 with a lesser affinity. Lanreotide inhibits multiple endocrine, neuroendocrine, and exocrine mechanisms such as decreasing circulating total and free IGF-I and treats neuroendocrine tumors that secrete excessive amount of growth hormone (acromegaly) or other active hormones or neuropeptides. Lanreotide is used for the treatment of acromegaly and to relieve the symptoms of neuroendocrine tumors.
Pasireotide is a synthetic long-acting cyclic peptide that binds to human somatostatin receptors 1, 2, 3, 4, and 5 and inhibits the release of human GH, glucagon, and insulin. Pasireotide is used for the treatment of Cushing’s disease and acromegaly. It also acts as an antineoplastic agent.
HOW ARE SOMATOSTATIN ANALOGS USED?
Somatostatin analogs are given as intramuscular and subcutaneous injections and oral tablets to treat the following:
Acromegaly
Carcinoid tumor
VIPoma (a type of pancreatic neuroendocrine tumor)
GEP neuroendocrine tumors
Carcinoid syndrome
Cushing’s disease
Diarrhea
Variceal bleeding
This link has the most complete list of SEs
https://www.rxlist.com/somatostatin_analogs/drug-class.htm
WHAT ARE SIDE EFFECTS OF SOMATOSTATIN ANALOGS?
Side effects of somatostatin analogs may include:
Nausea and vomiting
Injection site reactions
Diarrhea
Headache
Dizziness
Weakness
Fatigue
Sweating
Cholelithiasis
Abdominal discomfort
Indigestion
Constipation
Flatulence
Upper respiratory tract infections
Hyperglycemia (high sugar levels)
Hypertension (high blood pressure)
Arrhythmias (irregular heartbeats)
Conduction abnormalities
Biochemical hypothyroidism
Elevated liver enzymes
Pancreatitis
Muscle and joint pains
Anaphylaxis (life-threatening allergic reactions)
Dopamine is a chemical messenger in the brain that signal other nerve cells. Dopamine is involved in reward, motivation, memory and attention and is blamed for addiction. As well as emotional responses, dopamine controls body movement so it is important for both physical and mental wellbeing.
They have used dopamine to treat Parkinson’s disease, Huntington’s disease, and depression, anxiety disorders, schizophrenia, obsessive-compulsive disorder, and attention deficit hyperactivity disorder (ADHD).
Similar to dopamine, serotonin is a chemical and neurotransmitter that impacts mood, anxiety and happiness. Large amounts of serotonin are released in people using recreational drugs and may damage the nerves that contain serotonin. Produced in the brain and intestines, serotonin can’t cross the blood-brain barrier. The brain must produce any serotonin used in the brain.
The body produces more serotonin after eating something that is toxic or irritating. The increased level of serotonin causes the food to move through the body faster and be expelled in diarrhea.
Schizophrenia is an illness where people experience episodes of delusions and hallucinations. Genetics, substance abuse and trauma, particularly in childhood, can cause schizophrenia. Schizophrenia starts in the late teens to early 30s.
In the last few years there has been research conducted into the role of amino acids and biogenic amines as a potential cause of schizophrenia. One study found people with psychotic symptoms had higher levels of some amino acids and biogenic amines and lower levels of others compared to the control group with no schizophrenic symptoms.
List of Foods High in Amines
Vegetables
Broccoli and cauliflower
Rocket
Tomato
Fruit
Ripe bananas
Papaya and pawpaw
Fig
Custard apple
Mango
Coconut milk and cream
Proteins
Pork and turkey meat
Frozen fish products
Canned salmon and sardines
Nuts and Seeds
Almond, brazil, chestnut, hazelnut, macadamia, peanuts and pistachio nuts
Pumpkin, sesame, sunflower seeds
Oils
Copha
Coconut oil
Olive oil
Peanut oil
Foods that are very high in amines include:
Vegetables
Avocado
Eggplant
Spinach
Tomato (dried, puree, paste, sauce)
Fruit
Berries, cherries, currants
Citrus, grapes, kiwifruit, pineapple, passionfruit, plums
Dried fruit
Proteins
Aged beef
Bacon and ham
Chicken nuggets
Sausages
Canned tuna and anchovies
Meat pies
Cereals
Breakfast cereals with dried fruit and nuts
Condiments
Gravy and sauces
Fish, oyster, soy and miso sauces
Tomato and barbeque sauce
Tomato paste
Curry powder
Vinegar (except malt vinegar)
Nuts and Seeds
Hummus
Almond and hazelnut meal
Peanut paste
Roasted nuts
Sesame and mustard seeds
Coconut
Oils
Packaged salad dressings
Extra virgin, avocado, sesame oils
Drinks
Fruit juices
Soft drink
Chocolate drinks
Fruit cordials
Vegetable juices