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Clinical Research Directory

Browse clinical research sites, groups, and studies.

16 clinical studies listed.

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Healthy Subjects (HS)

Tundra lists 16 Healthy Subjects (HS) clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

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NOT YET RECRUITING

NCT07516639

First-in-Human Study of ISH0613: Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics

The goal of this clinical trial is to learn about a study drug called ISH0613 and how it behaves in healthy adults. This study will also evaluate the safety and tolerability of ISH0613 after a single intravenous (IV) dose. The main questions this study aims to answer are: I. What medical problems (side effects) may occur after receiving ISH0613? How does ISH0613 move through and get processed in the body? II. Does ISH0613 affect certain biological markers related to the immune system? III. Researchers will compare ISH0613 to a placebo (a look-alike substance that contains no active drug) to better understand its effects. Participants will: I. Receive a single intravenous infusion of either ISH0613 or placebo II. Stay in the clinical unit for several days for close monitoring after dosing III. Return to the clinic for follow-up visits over several weeks IV. Provide blood samples for safety checks and laboratory testing V. Be monitored for any side effects throughout the study

Gender: All

Ages: 18 Years - 45 Years

Updated: 2026-04-08

1 state

Healthy Subjects (HS)
SLE (Systemic Lupus)
RECRUITING

NCT06846658

Exploring the Olfactory Mucosa, Blood and Urine for the Identification of Early Biomarkers of Parkinson's Disease, Atypical Parkinsonisms and Neurocognitive Disorders Due to Lewy Body Disease

Clinical diagnosis of Parkinson's disease (PD), multiple system atrophy (MSA) and dementia with Lewy bodies (DLB) is challenging, especially in the early stages. Each disease is associated with distinct conformers of misfolded alpha-synuclein (maS) which form typical protein aggregates in the brain and represent key disease biomarkers. Thus, detection and characterization of intracerebral maS aggregates allow a definite diagnosis. The recent development of ultrasensitive assays enabled the detection of maS and other potential new biomarkers in peripheral tissues, although with several limitations. Here, the investigators propose to combine the expertise of leading and young researchers in the field of neurology, structural and molecular biology, biophysics and machine learning to perform ultrasensitive and multi-omics analyses of olfactory mucosa (OM), blood and urine of PD, MSA and DLB patients for detecting and characterizing key peripheral biomarkers allowing accurate disease recognition.

Gender: All

Updated: 2026-03-30

1 state

Parkinson Disease
MSA - Multiple System Atrophy
Lewy Body Dementia (LBD)
+2
ENROLLING BY INVITATION

NCT07377994

To Evaluate the Effect of Bacillus Coagulans Based Product in Gut Health and Immunomodulatory Effect in Healthy Adults

This randomized, double-blind, placebo-controlled clinical trial is designed to evaluate the effects of a Bacillus coagulans-based probiotic product on gut health, immunological parameters, and overall tolerability in healthy adult participants. The study aims to generate clinical evidence on the role of Bacillus coagulans in maintaining intestinal homeostasis and modulating immune responses under normal physiological conditions. Gut health will be assessed through both objective and subjective measures. Intestinal inflammation will be evaluated by measuring fecal calprotectin levels, a well-established biomarker of gut mucosal inflammation. Changes in fecal calprotectin from baseline to the end of the intervention period will be compared between the probiotic and placebo groups to determine the impact of the investigational product on gut inflammatory status. The immunomodulatory effects of the study product will be evaluated by analyzing changes in selected immune and inflammatory markers, including immunoglobulins (IgA, IgG, and IgM). These parameters will be measured at baseline and at the end of the study to assess systemic immune responses associated with supplementation and to compare outcomes between the intervention and placebo groups. In addition to laboratory-based assessments, participant-reported outcomes related to gut health and immune status will be captured using validated questionnaires, including the Gut Health Status Questionnaire (GHSQ) and the Immune Status Questionnaire (ISQ). These tools will be used to evaluate perceived overall relief and changes in gastrointestinal and immune-related well-being over the course of the study. Safety and tolerability of the Bacillus coagulans-based product will be evaluated throughout the study duration by monitoring adverse events and other safety parameters in both the intervention and placebo groups, ensuring suitability of the product for use in a healthy population. Participants will be instructed to consume the assigned study product twice daily, once in the morning and once in the evening after meals, for the duration of the intervention period. Compliance with study product intake will be documented by participants in a subject diary.

Gender: All

Ages: 18 Years - 50 Years

Updated: 2026-01-30

1 state

Healthy Subjects (HS)
RECRUITING

NCT07364149

Acute Effects of Structured Exercise and Static Stretching on Vascular Function, Neuromuscular Performance, and Metabolic Regulation in Adults

This experimental study investigates the acute cardiovascular and vascular responses to a single session of resistance training, with and without additional static stretching, compared with a resting control condition. Participants are allocated to one of three groups (control, resistance training, resistance training plus static stretching) and assessed at baseline, immediately after the session, and 30 minutes post-exercise. Primary outcomes include blood pressure and other hemodynamic or functional measures, in order to explore the short-term impact of these exercise modalities on cardiovascular regulation.

Gender: MALE

Ages: 18 Years - 55 Years

Updated: 2026-01-27

Healthy
Healthy Participants
Healthy Subjects (HS)
+3
NOT YET RECRUITING

NCT07263399

Effect of Hydrogen Gas on Hyperbaric Oxygen Toxicity

The goal of this trial is to investigate whether adding a small fraction of hydrogen gas to an oxygen-enriched breathing mixture can reduce pulmonary oxygen toxicity (POT) in healthy and active divers from the Swedish Armed Forces. The main questions it aims to answer are: * Does hydrogen gas reduce oxidative stress and changes in pulmonary function associated with prolonged hyperbaric oxygen exposure? * What are the underlying pathophysiological mechanisms of pulmonary oxygen toxicity? Researchers will compare oxygen-enriched breathing gas with 1-2% hydrogen to oxygen-enriched gas with 1-2% nitrogen (control) to see if hydrogen provides protective effects against POT during hyperbaric exposure. Participants will: * Complete two hyperbaric exposure sessions (hydrogen vs. nitrogen), each lasting 240 minutes at 1.75 ATA * Undergo pulmonary function tests and sampling of blod and urin before and after each session * Serve as their own controls in a double-blind, randomized, crossover study design

Gender: All

Ages: 20 Years - 64 Years

Updated: 2025-12-04

1 state

Oxygen Toxicity
Oxidative Stress
Hyperoxia
+4
RECRUITING

NCT07241923

A Single Ascending Dose Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of SYH2070 Injection

This is a randomized, double-blind, placebo-controlled, single ascending dose (SAD) study of SYH2070 injection when administered subcutaneously to healthy subjects.

Gender: All

Ages: 18 Years - 60 Years

Updated: 2025-12-01

1 state

Healthy Subjects (HS)
ENROLLING BY INVITATION

NCT07195890

Evaluation of the Effectiveness of Teen Mental Health First Aid in Secondary School Students in Hong Kong

Mental health problems in adolescents are on the rise worldwide especially after COVID -19 pandemic. Early detection and intervention should help to reduce the adverse impact of the mental illness on the adolescent. Yet the adolescent may not be able to recognize mental illness, have stigma against the mentally ill and mental health services, and may not seek help even with mental illness. The local situation in Hong Kong has been reviewed and presented in a separate article (Lai, 2024). The high prevalence of psychiatric conditions in Hong Kong adolescents has been reported (Chan et al, 2025). Teen Mental Health First Aid (t MHFA) is a course developed in Australia for the promotion of mental health literacy including awareness of mental illness, reduction of stigmatizing attitudes towards people with mental illness, and increase in appropriate help-seeking attitude and behavior among adolescents with emerging mental health problems (Hart, 2016). Mental Health Association of Hong Kong has run the mental health first aid courses in Hong Kong since 2004. The teen MHFA course has been translated and attuned to the local context recently. MHAHK has been funded by the Hong Kong Jockey Club in a two-year project in the development of a quality mental health campus in twenty secondary schools. In the project there will be mental health education programs for teachers, parents and students and mental health promotion activities in the schools. Teen MHFA will be provided to the students in the schools. It is a three-hour course separated into three separate sessions taught by trained instructors of MHAHK. The study will obtain a baseline information about the awareness of mental illness, the attitude towards the mentally ill and help seeking behavior of secondary school students, and to verify the effectiveness of the teen MHFA course in promotion of mental health literacy of the participants, and to guide the further refinement and development of an effective course. It is hoped that the teen MHFA course can be available to all secondary schools and can help adolescents to develop appropriate mental health literacy at this important phase of development before reaching adulthood.

Gender: All

Ages: 14 Years - 18 Years

Updated: 2025-09-29

1 state

Healthy Subjects (HS)
RECRUITING

NCT07114146

Physiological and Mood Changes After Walking in Green Spaces. A Comparison of Environments.

Natural environments, and more specifically forest environments, have shown in the last decade a growing interest as a protection against the frenetic pace of life of a large part of the urban population in developed countries, where symptoms related to stress and anxiety are associated with an increasingly frequent state of sub-health. The investigators propose to perform a randomized crossover study to analyze the effects of a walk in the forest on physiological and psychological markers related to autonomic nervous system activity in healthy adult. In addition, the investigators intend to observe whether the characteristics and perceptions of the forest environment could affect the results obtained in these markers using a scale created for this purpose. Participants will be healthy adults with no history of serious physical or psychological illnesses, who will be exposed to three forest environments. Physiological markers will be measured, including heart rate variability, which will be measured with a heart rate sensor that will monitor data throughout the exposure period, and heart rate and systolic and diastolic blood pressure, which will be measured with an automated device before and after each exposure. Before and after the walk through each of the forest environments, mood will be measured using the POMS scale, and our scale will be used to measure the perceived environmental quality after exposure to each environment. In addition to the walk through the three forest environments, a control environment on an indoor treadmill will be used as a comparator, where distance, slope and walking speed will be adjusted to replicate the intensity and physical demand of the three outdoor routes. The four interventions will be organized to create three different exposure sequences. Each exposure sequence will be randomly assigned to a different group. In turn, each participant will be randomly assigned to one of the three groups, so that all participants will undergo all four interventions in a repeated measures design. Our hypothesis supports the idea that exposure to forest environments causes changes in physiological parameters and mood associated with positive regulation for health and for the autonomic nervous system in healthy adults compared to a neutral non-forest environment. As a second hypothesis, environmental characteristics as well as the perceived quality of the forest environment would be related to the magnitude of such changes associated with autonomic nervous system regulation and mood in healthy adults.

Gender: All

Ages: 50 Years - Any

Updated: 2025-08-11

1 state

Healthy Subjects (HS)
Forest Therapy
Autonomic Nervous System Activity
+1
NOT YET RECRUITING

NCT07065136

Evaluation of 627 in Healthy Adult Subjects

This is a randomized, double-blind, placebo-controlled, single ascending dose and multiple ascending dose phase I clinical study to evaluate the safety, tolerability, PK and immunogenicity of SSGJ-627 in healthy adult subjects after single subcutaneous injection.

Gender: All

Ages: 18 Years - 45 Years

Updated: 2025-07-15

Healthy Subjects (HS)
NOT YET RECRUITING

NCT07025915

A Phase 1 Mass Balance Study of [¹⁴C]SSS17 in Healthy Chinese Males

This study aims to evaluate the absorption, metabolism, and excretion of a single oral dose of \[¹⁴C\]SSS17 in healthy adult Chinese male subjects, elucidating its overall pharmacokinetic profile in humans to provide essential information for its rational clinical use.

Gender: All

Ages: 18 Years - 45 Years

Updated: 2025-06-25

Healthy Subjects (HS)
RECRUITING

NCT06884488

Aftereffects of PES Preconditioned with RTMS on the Human Pharyngeal Motor Cortex

The goal of this interventional study is to optimize the excitatory brain effects of combined neuromodulatory therapies on swallowing areas of the brain. The main question it aims to answer is: Does preconditioning with 1 Hertz (Hz) repetitive transcranial magnetic stimulation (rTMS) delivered over hemispheric pharyngeal areas enhance the activating effects of pharyngeal electrical stimulation (PES) on cortical excitability? Participants will: * Visit the department three times, with at least a one-week gap between visits. * Undergo baseline measurements for Pharyngeal motor evoked potential (PMEP) and Thenar motor evoked potential (TMEP), involving an electromyography (EMG) pharyngeal catheter inserted into the pharynx and gel electrodes to detect muscle activity. * Be randomly allocated to one of the three preconditioning-conditioning procedures during each visit : 1Hz rTMS followed by 5Hz PES, sham 1Hz rTMS followed by 5Hz PES, and 1Hz rTMS followed by sham 5Hz PES 1. Real rTMS will involve a figure-of-eight coil flat against the head delivering 1Hz stimulation at 90% of the thenar resting motor threshold. 2. Sham rTMS will involve holding the coil perpendicular to the scalp to prevent brain stimulation. 3. PES will involve a catheter delivering 0.2-ms pulses at 5Hz and 75% of the maximal tolerated intensity for 10 minutes. Sham PES will involve deactivating the current generator. * Complete PMEP and TMEP measurements at baseline before intervention and every 15 minutes from 0 - 60 minutes after the rTMS-PES procedure. * Complete a survey regarding tolerability and safety at the end of each visit.

Gender: All

Ages: 18 Years - Any

Updated: 2025-03-19

Healthy Subjects (HS)
RECRUITING

NCT06774833

Self-initiated Perturbation-based Training in Older Adults

This is a single-blinded study. Participants will be randomly assigned to self-initiated perturbation-based balance training (SePBT) group or control (conventional balance training) group. Kinematic and Kinetic changes following SePBT group compared to control will be investigated.

Gender: All

Ages: 60 Years - Any

Updated: 2025-02-24

1 state

Healthy Subjects (HS)
RECRUITING

NCT06674525

Evaluation of 626 in Healthy Adult Subjects

This is a randomized, double-blind, placebo-controlled, single ascending dose phase I clinical study to evaluate the safety, tolerability, PK and immunogenicity of SSGJ-626 in healthy adult subjects after single subcutaneous injection.

Gender: All

Ages: 18 Years - 45 Years

Updated: 2024-12-10

Healthy Subjects (HS)
NOT YET RECRUITING

NCT06641388

A Study Evaluating the Single Subcutaneous Injection of Ebronucimab in Chinese Healthy Male Subjects

This is a phase I clinical study to evaluate the pharmacokinetics (PK) similarity of single dose subcutaneous injection of Ebronucimab with different production processes in Chinese healthy male subjects.

Gender: MALE

Ages: 18 Years - 45 Years

Updated: 2024-10-15

1 state

Healthy Subjects (HS)
NOT YET RECRUITING

NCT06633055

A Phase I Clinical Trial of JH013 Injection

This is a phase I clinical trial with a single dose escalation to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of JH013 injection in healthy subjects

Gender: All

Ages: 18 Years - 55 Years

Updated: 2024-10-09

Healthy Subjects (HS)
NOT YET RECRUITING

NCT06618482

Effects of Kinesiotape or Neuromuscular Taping on the Activation of the Transversus Abdominis Muscle. A Pilot Study

The use of adhesive bandages is a widely practiced technique in both clinical and sports settings. There is a great variety of materials used for bandaging, with multiple objectives: limiting movement, correcting joint positions, reducing pain, enhancing sports performance, and reducing the number of injuries. However, current knowledge about their potential effects is still limited, and more studies are needed to determine the most appropriate application parameters. For this reason, the objective of the study for which we request your collaboration is to determine to what extent the application of an adhesive bandage (neuromuscular tape) can influence muscle facilitation through fiber recruitment and strength development, to improve performance during exercise. The information derived from this research will provide a better understanding of the influence that an adhesive bandage (neuromuscular tape) can have on the neuromuscular system and on strength enhancement.

Gender: All

Ages: 18 Years - 35 Years

Updated: 2024-10-01

Healthy Subjects (HS)