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RecruitingNCT07764133Updated Aug 17, 2026

Whole Body Metabolic Activity as a Reflection of Tumor Metabolic Dysregulation and a Predictor of Treatment Response in Ovarian Cancer

An observational study in Epithelial Ovarian Cancer, sponsored by University of Tennessee Graduate School of Medicine. Recruiting at 1 site in United States. Open to female participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-17.

Sponsored by University of Tennessee Graduate School of Medicine · Observational

From the registry’s dates

  • Started May 2026; still recruiting 5 months later.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
50
Ages
18 Years and older
Sex
Female
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Study summary

The primary objectives of the study are:

  1. To delineate commonly utilized tumor metabolic alterations in ovarian cancer. These metabolic alterations will be explored for potentially targetable pathways to restore chemotherapy responsiveness.
  2. To define the relationship between whole-body metabolic activity as measured via indirect calorimetry with ex vivo measure of tumor metabolic activity.

    The secondary objectives of the study are:

  3. To evaluate longitudinal changes in whole-body metabolic activity over the course of cytotoxic chemotherapy and evaluate these changes as they relate to oncologic outcomes and treatment-free interval.
  4. To examine the impact of tumor metabolic alterations on healthy non-malignant tissues and serum metabolites.
  5. An additional exploratory objective is to collect data that will contribute to a more holistic understanding of the whole-body metabolic effects of ovarian cancer. Based on prior studies, surveys have been an effective method for capturing the social, psychological, and behavioral factors associated with the disease. It is possible that changes in metabolism and inflammation are mediated by these psychosocial factors that ultimately impact response to cancer therapy.

It is hypothesized that whole-body metabolic activity as measured via indirect calorimetry can be utilized as a non-invasive surrogate to reflect tumor metabolic dysregulation in patients with ovarian cancer. Moreover, it is hypothesized that there will be an inverse relationship between treatment-free interval and the metabolic rate when measured at a whole-body level and an increased rate of glycolysis when measured within the tumor microenvironment. To address these hypotheses, the study will pursue the specific aims listed above.

Read the detailed description

The dates of all study visits (seven in total) will be coordinated with each participant according to the anticipated chemotherapy schedule. If a participant enrolled in the study is found to have a non-gynecologic malignancy or benign pathology at the time of surgery, no further postoperative study visits will be completed.

There are a total of seven planned study visits.

Five study visits will include whole-body metabolic assessments:

  1. Prior to initiation of therapy or before surgical debulking (SV1).
  2. Four to six weeks after surgical debulking and before initiation of adjuvant chemotherapy (this timing is part of the standard of care) (SV3).
  3. Prior to cycle 3 of chemotherapy (SV4). This study visit will occur in conjunction with a scheduled chemotherapy visit.
  4. Prior to cycle 6 of chemotherapy (SV5). This study visit will occur in conjunction with a scheduled chemotherapy visit.
  5. Six months after completion of chemotherapy (SV7).

Two additional study visits (SV2 and SV6) will include vital sign and anthropometric assessments and blood collection.

  1. Blood samples will be collected for future ancillary testing, including circulating tumor DNA and serum metabolite analyses. Banked blood samples will be analyzed only after completion of study participation to minimize potential implications for clinical care, as circulating tumor DNA analysis remains experimental in ovarian cancer.
  2. Prior to surgical debulking (SV2). This study visit will be required only for participants who receive neoadjuvant chemotherapy before surgery. For participants who do not receive neoadjuvant chemotherapy, these assessments will be completed during SV1.
  3. Three months after completion of chemotherapy (SV6).

Direct participant involvement in the study ends after completion of the final study visit. The participant's electronic medical record (EMR) will be reviewed every six months until disease recurrence to collect oncologic outcome data, including progression-free survival and treatment-free interval.

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Conditions studied

  • Epithelial Ovarian Cancer
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In context

Carcinoma, Ovarian Epithelial

797 studies on the registry are indexed under Carcinoma, Ovarian Epithelial; 101 are open to participants now.

This study's planned enrollment of 50 is below the median of 200 across 91 observational studies indexed under Carcinoma, Ovarian Epithelial.

Browse Carcinoma, Ovarian Epithelial studies →

Lead sponsor

University of Tennessee Graduate School of Medicine is the lead sponsor of 27 studies on the registry; 13 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Patients with ovarian cancer receiving care at the study institution will be recruited for participation. Potential participants will be identified through their treating physicians and/or clinical care teams during routine clinical encounters, as well as through review of medical records for eligibility. The study population will include adults with ovarian cancer who are undergoing standard-of-care treatment, including surgery and/or chemotherapy, and who meet the study inclusion criteria. Participants will be followed prospectively to assess whole-body metabolic activity, tumor metabolic characteristics, and treatment-related outcomes. Efforts will be made to enroll a diverse group of participants representative of the patient population served by the institution.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Women
  2. Age >18 years
  3. Suspected of having epithelial ovarian cancer by the provider
  4. No prior cytotoxic therapy for ovarian cancer
  5. Surgical debulking is planned
  6. performance status 0-1

Exclusion criteria

Exclusion Criteria:

  1. Inability to provide voluntary
  2. Received medical intervention for adverse effects of chemotherapy
  3. Circumstances and/or medical conditions that would limit compliance with study requirements and protocol, as determined by the principal investigators.
  4. Poorly controlled diabetes, ≥9%
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

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Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
50 participants (estimated)
Patient registry
No

Groups and cohorts

  • Ovarian Cancer Cohort

    Patients with ovarian cancer undergoing standard-of-care treatment who will undergo serial whole-body metabolic assessments, biospecimen collection, and clinical follow-up to evaluate the relationship between systemic metabolic activity, tumor metabolic characteristics, and treatment outcomes.

06

What researchers measure

Primary outcomes

  1. Change in resting metabolic rate

    Time frame: prior to treatment [SV1], after debulking surgery [SV3], prior to cycle #3 chemotherapy [SV4], prior to cycle #6 chemotherapy [SV5], and 6 months after completion of chemotherapy [SV7]

  2. Change in respiratory quotient

    Time frame: prior to treatment [SV1], after debulking surgery [SV3], prior to cycle #3 chemotherapy [SV4], prior to cycle #6 chemotherapy [SV5], and 6 months after completion of chemotherapy [SV7]

  3. Change in carbon dioxide production

    Time frame: prior to treatment [SV1], after debulking surgery [SV3], prior to cycle #3 chemotherapy [SV4], prior to cycle #6 chemotherapy [SV5], and 6 months after completion of chemotherapy [SV7]

  4. Change in oxygen consumption

    Time frame: prior to treatment [SV1], after debulking surgery [SV3], prior to cycle #3 chemotherapy [SV4], prior to cycle #6 chemotherapy [SV5], and 6 months after completion of chemotherapy [SV7]

  5. Change in metabolic flexibility

    Time frame: prior to the treatment [SV1] and six months after completion of chemotherapy [SV7]

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Study locations

1 of 1 sites recruiting
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References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 17, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT07764133
Lead sponsor
University of Tennessee Graduate School of Medicine
Responsible party
Sponsor
First posted
Aug 13, 2026
Start date
May 13, 2026
Primary completion
May 13, 2028 (estimated)
Completion
May 13, 2028 (estimated)
Last update
Aug 17, 2026

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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