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GABA Explained: The Most Important Neurotransmitter (ft. Dr. Scott Sherr) | SNH Podcast #69

GABA Explained: The Most Important Neurotransmitter (ft. Dr. Scott Sherr) | SNH Podcast #69

Released Wednesday, 1st May 2024
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GABA Explained: The Most Important Neurotransmitter (ft. Dr. Scott Sherr) | SNH Podcast #69

GABA Explained: The Most Important Neurotransmitter (ft. Dr. Scott Sherr) | SNH Podcast #69

GABA Explained: The Most Important Neurotransmitter (ft. Dr. Scott Sherr) | SNH Podcast #69

GABA Explained: The Most Important Neurotransmitter (ft. Dr. Scott Sherr) | SNH Podcast #69

Wednesday, 1st May 2024
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0:01

Welcome, everybody. It's so nice to see so many

0:03

of you here this morning. So I'm gonna be talking about GABA.

0:06

What's GABA got to do with it? R.

0:09

I. P. My name is Dr Scott.

0:11

Sure. I'm the chief operating officer of Health

0:13

Optimization, Medicine and Practice. Our nonprofit organization training

0:16

doctors like you and practitioners

0:19

like you how to optimize health rather than treat disease and treatment.

0:22

I have a lot of fun with this talk.

0:24

I've, this is something that actually Dr.

0:27

Ted and I, but mostly Dr. Ted developed as a strategy for

0:31

our overall understanding that

0:34

nobody remembers the most important neurotransmitter in our opinion, GABA.

0:39

Everybody remembers serotonin and dopamine and norepinephrine.

0:42

These, these are the fancy ones. Everybody knows about these, but

0:45

everybody forgets about GABA.

0:47

So this is going to be a talk on how GABA is made, what GABA

0:50

is and why we should care. Let's talk about top

0:53

symptoms of GABA deficiency.

0:56

So if you have a clinical practice, you probably have some of your

0:59

patients with these symptoms. Anxiety, fear, depression, a short temper,

1:04

phobias, impulsiveness, disorganization,

1:08

addictions, schizophrenia, obsessive compulsive disorder.

1:11

Any of your patients have any of these? Probably, right?

1:13

But you're not thinking about GABA deficiency most of the time.

1:16

And then systemic symptoms, these are also associated with GABA deficiency.

1:20

IBS, diarrhea, high blood pressure,

1:22

tinnitus, chronic pain, migraines,

1:24

allergies, frequent urination, flushing,

1:27

sweating, salt cravings, muscle tension.

1:30

So all of these, could potentially

1:32

be showing you that your patients and clients may have a GABA deficiency.

1:37

It's not the first thing on many of our radars, of course, but maybe

1:39

it should be part of that initial understanding of what might be going on.

1:44

GABA is really important, and now even

1:48

the drug industries are getting the idea.

1:50

So this is the first drug Approved just recently.

1:53

This is a New York Times article. The first pill for postpartum depression.

1:57

And it's called, Zuranolone, I think is how you say it.

2:01

And it is a positive allosteric

2:03

modulator of the GABA receptor. We'll talk about what that is.

2:05

But it's supposed to be used for the first 14 days.

2:08

Only for two weeks. Supposedly, while you're taking another

2:10

drug like an SSRI for that to work, but these work right away because

2:14

it's affecting the GABA receptors s directly and improving depression almost

2:18

immediately, too, which is pretty awesome. You don't have to go directly to drugs, of

2:21

course, but sometimes they're necessary. So, let's talk about GABA synthesis.

2:24

GABA is only made in the brain. Okay, you have to have glutamine,

2:28

which is an amino acid, it's converted into glutamate.

2:32

in the brain. And then glutamate is our

2:34

excitatory neurotransmitter. And you have GABA, which is our

2:37

inhibitory neurotransmitter. So 20 percent of the brain's

2:41

neurotransmission is actually GABA.

2:43

So it's a huge amount. And glutamate in GABA combined

2:46

is about 80 percent actually. So it's the combination of the two is the

2:49

majority of your neurotransmitter system.

2:52

And to make glutamine into GABA, you need.

2:56

You need this enzyme called glutamine synthesase. And then from glutamate to GABA itself,

3:01

you have to convert this, you need vitamin B6, and you need magnesium.

3:04

So you need cofactors along the way to make this conversion happen.

3:08

Some people are really great at converting GABA into GABA.

3:11

Some people are not very good at it. And a lot of times it's related to these

3:14

cofactors, but there's other reasons, too. And see, here are some of those reasons.

3:18

So, If you have a high copper level

3:20

and a low zinc level, you're not going to be able to actually have the

3:23

GABA receptor work as effectively. If you're vitamin B6 deficient, you're

3:27

also not going to convert well from glutamate to GABA, as I mentioned.

3:31

If you have chronic stress, if you have chronic hypercortisolemia, if

3:34

you're always stressed, you're going to deplete your GABA system, and then

3:37

your GABA levels are going to go down. If you're magnesium deficient, and

3:41

most of our clients and patients are magnesium deficient, they're

3:44

not going to convert well either. If you have infection, this

3:47

is going to stress the system and also decrease GABA levels.

3:50

Now, GABA supplementation may help your

3:54

GABA levels, but actually under most circumstances it's not going to because

3:57

GABA itself is a big molecule and doesn't

4:00

go across the blood-brain barrier. Under , certain circumstances, it

4:02

may, and we'll talk about that. And then probiotics can also help with

4:06

this conversion, help with this enzyme. So, you can actually measure, and

4:09

you saw some of these slides with Dr. Ted, you can actually measure

4:12

people's vitamin B6 level, and if

4:14

it's low, it's very likely they're not converting well from glutamate to GABA.

4:18

So this is something to be thinking about, and this is why we do

4:20

metabolomics testing as well.

4:24

You can check their magnesium level. In this patient, in this client, it

4:27

was a normal magnesium level, this is red blood cell magnesium, but a lot

4:30

of our clients, it's going to be low. So if you have a low magnesium

4:33

level, if you have low B6 levels.

4:35

You're not going to convert well from glutamate to GABA. This is the GABA receptor.

4:40

You don't have to worry about this too much. Just to know that it's a pentameric structure.

4:44

It's got five subunits. And these subunits change depending on

4:47

where the GABA receptor is in the brain.

4:49

Sometimes they'll look one way and

4:51

they'll have various combinations depending on what they're doing. GABA is everywhere in the brain.

4:55

These GABA receptors, the subunits change depending on what's required and

4:58

what's going on in that particular area. So this is the mechanism of the

5:02

GABA receptor, so we're going to start with GABA A here.

5:05

So you have activation of the receptor, you have opening of the central pore,

5:09

you have influx of chloride, you have hyperpolarization, you have decreased

5:13

occurrence of the action potential. So this all is saying that you're

5:16

inhibiting the actual firing

5:18

of this particular neuron that has the GABA receptor.

5:21

So you're inhibiting the action potential. So you're stopping things, you're

5:24

calming things down in general. Chloride goes through,

5:28

and it hyperpolarizes. This is the GABA B receptor.

5:32

It's called a G protein couple receptor. It's a little bit different, and it's

5:35

called a metabotropic receptor, and I'll show you what this means in a minute.

5:38

This is GABA B. So, GABA B itself, what it does,

5:41

it's a presynaptic and postsynaptic.

5:43

So, presynaptically, it's preventing, here, the release of an excitatory

5:47

neurotransmitter, glutamate, which is what we've been talking about before,

5:50

is the conversion of glutamate to GABA. And then you have the postsynaptic, here,

5:53

which is increasing potassium outflux,

5:56

which causes the hyperpolarization. It's a little bit different, and

5:59

there's a different distribution of the GABA B receptors in the brain.

6:03

So here's a quick summary. So GABA A is, it's called an ionotropic,

6:07

or it's a ligand gated channel opening, and it's a pentamer structure.

6:10

It's widespread as post synaptic influx.

6:14

It's endogenous agonist is GABA.

6:16

You have other drugs acting on it, which we'll talk about in a minute.

6:19

Pharmacological actions here and then

6:21

GABA B is, as you see here, it's

6:24

also widespread, it's metabotropic, it's presynaptic and postsynaptic,

6:28

and it has these particular, pharmacological actions as well,

6:31

all right. So. There's a couple definitions here.

6:34

So orthosteric ligands, these are chemicals that interact with

6:38

the same binding site as the natural endogenous chemical.

6:41

In this case, we're talking about GABA itself.

6:44

So an allosteric ligand or allosteric

6:46

modulator is something that works by

6:48

modifying how the receptors behave when it's bound to the orthosteric ligand.

6:52

So in this case, we're talking about a separate site.

6:54

away from GABA that binds this

6:56

particular modulator and then makes

6:59

GABA work better or helps the binding or

7:01

improves the chloride channel opening. And then a positive allosteric modulator

7:05

is something that binds and it causes this positive response where you have

7:08

an increased affinity of GABA to bind, you have more chloride going through,

7:12

and you have more hyperpolarization. So this is a picture of the

7:14

GABA receptor and ligand. So here's a couple, examples of

7:17

what it looks like to have where GABA is binding and where some of

7:21

these other drugs will bind to.

7:24

So you have alcohol everybody used

7:26

to love or maybe still loves alcohol. It's got a very high affinity

7:30

for the GABA receptor. Very, very high affinity.

7:33

Benzodiazepines here, very

7:36

high affinity as well. Has anybody ever used Flamazenil before?

7:39

I used it a couple of times in residency, I don't recommend it.

7:42

It causes seizures because it has the opposite effect.

7:45

GABA antagonist, so it prevents the chloride channel from opening.

7:49

Zolpidem, which is the Z drugs, Ambien and others, they bind and bind

7:53

very tightly to the GABA receptor. Quaaludes, anybody ever tried a Quaalude?

7:57

I don't know how everybody, yeah. Dr. Ted, no, no.

8:00

This is back in the 70s. So, but they also were, , A GABA

8:03

binding here, an allosteric site, barbiturates, which we use sometimes

8:07

for alcohol withdrawal, actually. Sometimes we'll still use those,

8:10

but for pretty much not used otherwise, general anesthetics.

8:13

And then finally, the GABA is where it's GABA binding itself.

8:16

So that's where GABA is binding. And so all these other sites on the

8:19

GABA receptor are places where other

8:22

molecules can bind, increase or decrease

8:25

the affinity of GABA binding and increase or decrease chloride channel opening.

8:29

It's on the right side of your screen over there.

8:32

You can see just a top view of the same thing happening.

8:34

Benzos are probably the most common positive allosteric modulator of

8:38

the GABA receptor that we use. Unfortunately, Benzos

8:40

have a very high affinity. We're talking about Ativan,

8:43

Xanax, Valium, those kinds of

8:45

drugs have a very high affinity. affinity for the GABA receptor.

8:48

So when somebody is taking these

8:50

medications for long periods of time, they cause tolerance, they cause withdrawal,

8:53

they can actually cause hallucinations

8:56

and death and all those fun things too. So, but you can see here that what I

9:00

wanted to point out is that there's different subunits of the Alpha

9:02

1 subunit of the GABA receptor is

9:04

associated with sedation hypnosis. So this is actually a lot of

9:06

your Z drugs, like your Ambien's

9:09

and Lunesta's of the world. And then your Alpha 2 subunit is.

9:12

It's more of your anxiolytic and muscle relaxer.

9:15

So this is where your benzo is going to mostly bind.

9:17

So in general, positive allosteric modulators are less addictive overall.

9:23

However, that's not the case obviously for benzos and barbiturates and alcohol.

9:28

And some of the natural equivalents that we'll talk about do have less of affinity,

9:32

but still have significant impact. So drugs that act on the GABA

9:35

B receptor, the most famous being, GHB gamma hydroxybutyrate.

9:39

GHB is well known as the , date rape drug. But it's actually a fantastic drug

9:42

for muscle relaxation, sleep, and

9:45

has lots of great other indications,

9:47

including narcolepsy actually. If anybody lives, listens to our podcast,

9:50

the Smarter Not Harder podcast, I had a

9:52

really great conversation with a guy named Dan Party, who was involved in getting

9:56

GHB to market for pharmaceutical reasons

9:58

with very interesting talk with him. So we're going to switch over here.

10:03

So GABA cell GABA in general.

10:06

The cells that have GABA receptors are mostly what we call inter neurons.

10:10

These are neurons that are between neurons, inter neurons,

10:13

and they're really important for learning, for memory, for behavior.

10:16

They're kind of like the way stations between sensory and motor

10:19

processing, and even though they're

10:21

really small, like if you can't really see here, but it's a tiny one.

10:24

Like, the GABA here, but this is the big dopamine receptor, , neuron, the big

10:27

5 HTP, the big serotonin neuron here. But you have, like, the small GABA.

10:31

This is doing a lot of the processing between them.

10:34

So they're extremely important, and they're actually in these locations

10:37

to make sure that they can actually be those wave stations to prevent signaling.

10:41

Oftentimes, in our brain, it's actually preventing signaling

10:43

that's most important, not propagating, interestingly enough.

10:47

Okay. So we're going to talk about how

10:49

you can dim your GABA switches without a prescription required.

10:52

And, but the first thing to say is that most GABA supplements don't work.

10:55

And we, and I was mentioning that earlier, it's because GABA is such

10:58

a big molecule, it doesn't get across the blood brain barrier.

11:01

If you do have patients that are taking GABA and they are getting an effect,

11:05

it could mean that they have a leaky brain, leaky gut axis, potentially.

11:09

There are some formulations, maybe nanoliposomal, for example, that may work.

11:12

But in general, if they're getting a significant impact from GABA itself,

11:16

at least clinically, I've seen that they often have a leaky gut, and that

11:19

usually means they have a leaky brain. I don't like telling patients

11:22

they have a leaky brain because that doesn't sound that great. I usually say that your

11:25

blood brain barrier may not be as great as it should be.

11:28

But anyway, so you can also, of course, give glutamine and glutamates.

11:32

So glutamine is an amino acid, it's

11:35

in various types of foods, meat,

11:38

Spinach, and fish as well, of course.

11:40

And so you can get glutamine from a lot of different sources, but what we do in

11:43

health optimization medicine and practice, we test for these kinds of things.

11:46

We test vitamin B6, we test for magnesium, we test their

11:50

glutamine levels, and we can tell. And if they have a certain symptomatology

11:53

and they have certain co factor

11:55

deficiencies, well, you know, we know that they're probably GABA deficient too.

11:58

MSG. Everybody loves MSG. Everybody actually doesn't love MSG.

12:01

It's monosodium glutamate, right? This is what you can get

12:04

in Chinese restaurants. They make the food nice and sweet

12:06

for you, but you get a headache. That's because you get all of a sudden

12:09

this huge rise in glutamate, and you have

12:11

to get that conversion over to glutamate, to GABA, and that can take some time.

12:16

And nicotinyl GABA. So this is a really cool form of

12:19

GABA that's attached to a vitamin B3. And when you do this, you actually

12:23

allow this molecule, nicotinyl GABA, to get through the blood

12:26

brain barrier very easily. And then it hydrolyzes

12:28

to vitamin B3 and GABA. And when that happens, you get this

12:31

nice vitamin B3 effect, which is mild vasodilation and mild energy

12:35

production, , At the same time, your

12:37

GABA itself, getting into the brain, increasing, your GABA ability and

12:41

increasing GABA binding to its receptor. So relaxation.

12:44

What's nice about this is it's not very sedating for most people.

12:47

So if you have anxiety and stress during the day, you can take nicotinyl

12:49

GABA and you don't feel tired. You just don't feel stressed, anybody use

12:53

valerian root before for patients, right?

12:55

So very common. This is actually a valerian

12:58

root, something that actually binds to the benzo site.

13:01

So it's a positive allosteric

13:04

modulator of the GABA receptor. Doesn't bind as tightly, but it does work

13:07

really well for some people for sleep. Covain, which is the

13:10

active ingredient in Kava. It's actually a similar binding site.

13:13

Also a positive allosteric modulator of the GABA receptor.

13:16

Honokyl. Anybody used Honokyl as well?

13:19

So this is from Magnolia Bark. Also binds as a positive allosteric

13:23

modulator to the GABA receptor.

13:25

Works really well, for a lot of people. Does anybody know what this is?

13:30

It's a mushroom it's a very famous mushroom. It's called Flyagaric, or

13:34

Amanita muscaria is the other name for it, of Christmas lore.

13:38

Does anybody know about the Christmas tales of Amanita?

13:41

Amanita has two compounds in it, mostly.

13:44

It's got a lot of other things, but two major ones. One is called agarin, otherwise

13:48

named muscimol, and another one is called ibotenic acid.

13:52

Ibotenic acid is neurotoxic. This is the one that mostly causes

13:55

the psychedelic experiences of

13:57

taking this particular mushroom. But, you don't mostly take

14:00

this mushroom directly. The stories were that shamans would

14:04

drink the urine of reindeers, because

14:08

reindeers would be able to tolerate this.

14:10

Okay. And then the shaman would actually then urinate.

14:13

And then other people would drink the urine. This is in Northern.

14:17

You can, this is actually a great New York times article on this with some

14:19

great videos as well, but that's mostly because the toxicity is because of

14:22

ibotenic acid, but agarin or muscimol

14:25

is a fantastic orthosteric ligand of

14:28

the GABA receptor, which means That it

14:31

directly enhances GABA in the system,

14:33

and it does it very effectively. But the key is to have

14:36

it at very low doses. So it's a GABA receptor agonist.

14:39

It easily crosses the blood-brain barrier. It's got a high potency, it's long-acting.

14:42

It's about 6 to 10 hours overall for a half-life.

14:46

It's naturally occurring, or you can make it synthetically, in low doses.

14:49

It's safe and effective. And at high doses it can be

14:52

hallucinogenic, but usually in, in combination with the Ibotenic

14:54

acid and the actual musher. Non pharmacologic, of course, yoga,

14:59

meditation, breathwork, anything that's going to make you more

15:01

parasympathetic is also going to increase GABA tone in the brain.

15:05

Physical activity also helps reset the system and the balance between glutamate

15:08

and GABA, so also being physically

15:10

active is also really important. And then, finally, it's really

15:14

important, and this is kind of the ethos of health optimization medicine

15:18

and practice, is we're detecting and correcting at the metabolomic level.

15:22

And so, you really want to be keeping the GABA deficiency aspect

15:25

of things on your clinical radar. So we test for the nutrients.

15:28

We test for magnesium. We test for vitamin B6. We ensure optimized GABA production.

15:33

And you want to do that as sort of your baseline for everybody.

15:36

So when somebody comes to see me, I'm not looking for GABA deficiency exactly.

15:40

What I'm doing is doing a full metabolic, metabolomic profile,

15:43

correcting as I see, and then you often

15:46

will see these improvements in mood and depression and anxiety because

15:50

you're actually working on that. neurotransmitter system.

15:52

Sometimes you can give herbals and you can give supplements and

15:55

things like that to help right now. That's what the company, the

15:58

transcriptions company is all about. But the key for the long term is to really

16:02

work on that foundation and optimize it. Of course, you want to implement dietary

16:05

and lifestyle measures to boost GABA production, considering herbal and fungal

16:09

GABA agonists and orthosteric ligands to support GABA production as well.

16:13

And then you want to really want to avoid your benzos and your barbiturates,

16:17

obviously, and drugs that are going to

16:19

cause dependence, withdrawal, intolerance. I mean, that's just important

16:22

for us to think about. Sometimes it's unavoidable and I use

16:25

these in my patients when they really need it, but oftentimes we can get

16:28

away with not using them because we have a lot of great options here from

16:31

an herbal and fungal perspective. Thank you guys very much for listening.

16:36

I really appreciate your time.

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