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Protocol Details

Microneurographic Assessment of Peripheral Nerves in Healthy Volunteers and Individuals with Sensory Dysfunction Caused by Inherited Mutations in the PIEZO2 Gene

This study is NOT currently recruiting participants.

Summary | Eligibility | Citations | Contacts




Sponsoring Institute

National Center for Complementary and Integrative Health (NCCIH)

Recruitment Detail

Type: Recruitment has not started
Gender: Male & Female
Min Age: 18 Years
Max Age: 100 Years

Referral Letter Required


Population Exclusion(s)

Pregnant Women



Recruitment Keyword(s)



PIEZO2-Deficiency Syndrome

Investigational Drug(s)


Investigational Device(s)




Supporting Site

National Center for Complementary and Integrative Health


PIEZO2 Deficiency Syndrome (PDS) is a genetic disorder that affects a person s ability to feel touches and pain. Researchers want to know more about how PDS changes nerve function.


To compare nerve function in people with PDS to that in people without PDS.


People aged 18 years and older with PDS enrolled in protocol 16-AT-0077. Healthy volunteers are also needed.


Participants will have at least 1 clinic visit. They will undergo a test that measures activity in the nerves.

For the test:

Participants will place their arm or leg in a comfortable position.

Ultrasound will be used to locate nerves. A smooth wand will be slid over the skin to capture images of the structures below.

Two thin needles will be inserted through the skin. These needles are much smaller than the kind used to draw blood.

The needles will record nerve activity as different sensations are applied to the skin. These include mild electrical pulses; heat and cold; bending of the knee or elbow; vibration; air puffs; pulling a hair; and tapping, stroking (brushing), stretching, pinching, and pushing on the skin at different levels of force.

Each test takes 5 to 10 minutes. Participants will describe the sensations they feel.

Participants may opt for an additional test that measures how nerves respond after heat pulses are used to create mild redness on the skin.

Researchers would like at least 2 tests from each person. Participants may return for up to 3 additional visits, if desired, to complete all the testing.

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In order to be eligible to participate in this study, an individual must meet all of the following criteria:

All Participants

-Stated willingness to comply with all study procedures and availability for the duration of the study

-Male or female, aged 18 years and over.

-The ability to provide written informed consent.

-Enrolled in 16-AT-0077, Clinical and Scientific Assessment of Pain and Painful Disorders .

PDS Patients

-Clinical and genetic diagnosis of PIEZO2-LOF.

Healthy participants

-In good general health as evidenced by medical evaluation under 16-AT-0077.


All Participants:

-Difficulties with communication that make subjective innocuous and pain assessments impossible or unreliable.

-Unable to comply with study procedures or visits.

-Has a dermatological condition that might influence cutaneous sensitivity.

-Congenital limb deficiency or amputation of any limb.

-Prior history of syncope.

-Peripheral neuropathy or current chronic pain condition or has had chronic pain in the past year (painful condition lasting more than six months), including ongoing treatment with medications for neuropathic pain (e.g. gabapentin, tricyclic antidepressants, pregabalin, tramadol).

-Has a major medical condition, such as kidney, liver, cardiovascular, autonomic, pulmonary, or neurological problems (e.g., epilepsy) or a chronic systemic disease (e.g., diabetes), or Raynaud s Disease.

-Current and untreated diagnosis of depression, post-traumatic stress, syndrome, bipolar disorder, psychosis, anxiety or panic disorder, alcohol or substance use disorders.

-Pregnant (verbal confirmation) or breastfeeding.

-Are participating in other ongoing research protocols involving interventions that would interfere with somatosensation.

-Employees or staff that work at NCCIH.

-Adults who are unable to provide their own consent.

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Principal Investigator

Referral Contact

For more information:

Alexander T. Chesler, Ph.D.
National Center for Complementary and Integrative Health (NCCIH)
BG 35A RM 1E450
35A Convent Dr
Bethesda MD 20892
(301) 594-1049

Hayley M. Hansen
National Center for Complementary and Integrative Health (NCCIH)
BETHESDA MD 20892-1235
(301) 451-2026

Office of Patient Recruitment
National Institutes of Health Clinical Center (CC)
Building 61, 10 Cloister Court
Bethesda, Maryland 20892
Toll Free: 1-800-411-1222
Local Phone: 301-451-4383
TTY: TTY Users Dial 7-1-1

Clinical Trials Number:


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