Progranulin induces autophagy disorder in type 2 diabetic nephropathy

ISRCTN ISRCTN18100534
DOI https://doi.org/10.1186/ISRCTN18100534
Secondary identifying numbers 2014074
Submission date
15/01/2017
Registration date
03/02/2017
Last edited
02/02/2017
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Urological and Genital Diseases
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Background and study aims
Type 2 diabetes mellitus (T2DM) is a long term condition where a person is unable to control their blood sugar (glucose) levels as they do not produce enough insulin to function properly (insulin deficiency), or that the body’s cells don’t react to insulin as they should do (insulin resistance). Diabetic kidney disease (nephropathy) develops in nearly 40% of patients with type 2 diabetes (T2DM). Progranulin (PGRN) is a protein which has recently been found to play a role in regulating the breakdown of sugar in the body and the sensitivity of cells to insulin. However there is little known about the role PGRN plays in the development of diabetic nephropathy in people with T2DM. The aim of this study is to investigate the clinical significance and role of PGRN in people with T2DM.

Who can participate?
Adults with T2DM and adults who have normal blood sugar control.

What does the study involve?
All participants attend a single study visit where they have samples of blood taken in order to measure PGRN, blood sugar and insulin levels. Of these participants those who have kidney disease also have small samples taken from their kidneys (biopsy) to look at chemicals indicating cell breakdown.

What are the possible benefits and risks of participating?
There are no direct benefits involved with participating. There is a small risk of complications such as infection for patients having samples of their kidneys taken.

Where is the study run from?
The First Affiliated Hospital of Xi’an Jiaotong University School of Medicine (China)

When is the study starting and how long is it expected to run for?
March 2013 to August 2016

Who is funding the study?
1. National Natural Science Foundation of China (China)
2. The New Century Excellent Talentsin University from the Ministry of Education (China)

Who is the main contact?
Professor Honzhi Sun
sunhongzhi@mail.xjtu.edu.cn

Contact information

Prof Hongzhi Sun
Scientific

Medical School of Xi’an Jiaotong University
76 Yanta West Road
Xi’an
710061
China

Phone +86 29 0826 55046
Email sunhongzhi@mail.xjtu.edu.cn

Study information

Study designObservational cohort study
Primary study designObservational
Secondary study designCohort study
Study setting(s)Hospital
Study typeScreening
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet
Scientific titlePGRN Links Autophagy: Etiology study of Type 2 diabetic nephropathy
Study objectivesThe aim of this study is to investigate the clinical significance and correlations of progranulin (PGRN) and autophagic imbalance in patients with type 2 diabetic nephropathy.
Ethics approval(s)Xi’an Jiao Tong University Ethics Committee, 01/03/2014, ref: 2014074
Health condition(s) or problem(s) studiedDiabetic nephropathy
InterventionA total of 134 patients with type 2 diabetes and 20 participants with normal glucose tolerance are enrolled. Patients with type 2 diabetes are divided into three groups based on their urinary albumin excretion rate (UAER): simple diabetes mellitus (SDM), early diabetic nephropathy (EDN), and clinical diabetic nephropathy (CDN).

All participants one study visit and provide blood samples when they visit to measure serum PGRN, plasma glucose, plasma insulin and HbA1c. Serum concentrations of PGRN are measured using ELISA.

Renal tissue is obtained from six living allograft donors and 12 diabetic nephropathy patients (taken from the existing participant groups). Autophagy indicators Atg7, LC3, and p62 of renal tissue are detected by Real-time PCR and western blotting.
Intervention typeOther
Primary outcome measure1. PGRN serum concentration is measured using ELISAs at baseline and 2 hours after overnight fasting
2. Plasma glucose is measured using glucose oxidase method at baseline and 2 hours after overnight fasting
3. Serum insulin is measured using radioimmunoassay at baseline and 2 hours after overnight fasting
4. HbA1c values are measured using high-performance liquid chromatography at baseline and 2 hours after overnight fasting
Secondary outcome measuresAutophagy indicators Atg7, LC3, and p62 of renal tissue are measured using immunohistochemical examination, real-time PCR and western blotting at baseline, 0, 10, 20 and 40 minutes after overnight fasting.
Overall study start date03/03/2013
Completion date01/08/2016

Eligibility

Participant type(s)All
Age groupAdult
SexBoth
Target number of participants154
Key inclusion criteriaPatients:
1. Aged between 20 and 80 years old
2. Diagnosed with type 2 diabetes mellitus

Controls:
1. Aged between 32 and 72 years
2. Normal glucose control
Key exclusion criteria1. Past history of malignancy
2. Degenerative disease of the nervous system
3. Diabetic macrovascular complications
4. Other endocrine diseases which affect glucose metabolism and lipid metabolism
5. Chronic hepatitis
6. Primary kidney disease
7. Recent inflammatory disease
8. Acute trauma
9. Taking thiazolidinedione drugs in the previous 3 weeks
10. Pregnancy
11. History of drug abuse.
Date of first enrolment01/08/2014
Date of final enrolment01/08/2015

Locations

Countries of recruitment

  • Afghanistan
  • China

Study participating centre

The First Affiliated Hospital of Xi’an Jiaotong University School of Medicine
Key Laboratory of Environment and Genes Related to Diseases
Ministry of Education
Medical School of Xi’an Jiaotong University
Xi’an
710061
China

Sponsor information

National Natural Science Foundation of China
Government

Medical School of Xi’an Jiaotong University
76 Yanta West Road
Xi’an
710061
China

Phone +86 02 90 8265 5046
Email sunhongzhi@mail.xjtu.edu.cn
The New Century Excellent Talentsin University from the Ministry of Education
Government

Medical School of Xi’an Jiaotong University
76 Yanta West Road
Xi’an
710061
China

Phone +86 29 0826 55046
Email sunhongzhi@mail.xjtu.edu.cn
National Natural Science Foundation of China
Government

Funders

Funder type

Government

National Natural Science Foundation of China

No information available

The New Century Excellent Talentsin University from the Ministry of Education

No information available

Results and Publications

Intention to publish date01/08/2017
Individual participant data (IPD) Intention to shareYes
IPD sharing plan summaryAvailable on request
Publication and dissemination planPlanned publication in a peer reviewed journal.
IPD sharing planThe datasets generated during and/or analysed during the current study are/will be available upon request from Lin Xu (irenewayne@126.com)