Navigation Links
In third-degree burn treatment, hydrogel helps grow new, scar-free skin
Date:12/13/2011

Johns Hopkins researchers have developed a jelly-like material and wound treatment method that, in early experiments on skin damaged by severe burns, appeared to regenerate healthy, scar-free tissue.

In the Dec. 12-16 online Early Edition of Proceedings of the National Academy of Sciences, the researchers reported their promising results from mouse tissue tests. The new treatment has not yet been tested on human patients. But the researchers say the procedure, which promotes the formation of new blood vessels and skin, including hair follicles, could lead to greatly improved healing for injured soldiers, home fire victims and other people with third-degree burns.

The treatment involved a simple wound dressing that included a specially designed hydrogel -- a water-based, three-dimensional framework of polymers. This material was developed by researchers at Johns Hopkins' Whiting School of Engineering, working with clinicians at the Johns Hopkins Bayview Medical Center Burn Center and the Department of Pathology at the university's School of Medicine.

Third-degree burns typically destroy the top layers of skin down to the muscle. They require complex medical care and leave behind ugly scarring. But in the journal article, the Johns Hopkins team reported that their hydrogel method yielded better results. "This treatment promoted the development of new blood vessels and the regeneration of complex layers of skin, including hair follicles and the glands that produce skin oil," said Sharon Gerecht, an assistant professor of chemical and biomolecular engineering who was principal investigator on the study.

Gerecht said the hydrogel could form the basis of an inexpensive burn wound treatment that works better than currently available clinical therapies, adding that it would be easy to manufacture on a large scale. Gerecht suggested that because the hydrogel contains no drugs or biological components to make it work, the Food and Drug Administration would most likely to classify it as a device. Further animal testing is planned before trials on human patients begin. But Gerecht said, "It could be approved for clinical use after just a few years of testing."

John Harmon, a professor of surgery at the Johns Hopkins School of Medicine and director of surgical research at Bayview, described the mouse study results as "absolutely remarkable. We got complete skin regeneration, which never happens in typical burn wound treatment."

If the treatment succeeds in human patients, it could address a serious form of injury. Harmon, a coauthor of the PNAS journal article, pointed out that 100,000 third-degree burns are treated every year in U. S. burn centers like Bayview's. A burn wound dressing using the new hydrogel could have enormous potential for use in applications beyond common burns, including treatment of diabetic patients with foot ulcers, Harmon said.

Guoming Sun, a Maryland Stem Cell Research Postdoctoral Fellow in Gerecht's lab and lead author on the paper, has been working with these hydrogels for the past three years, developing ways to improve the growth of blood vessels, a process called angiogenesis. "Our goal was to induce the growth of functional new blood vessels within the hydrogel to treat wounds and ischemic disease, which reduces blood flow to organs like the heart," Sun said. "These tests on burn injuries just proved its potential."

Gerecht says the hydrogel is constructed in such a way that it allows tissue regeneration and blood vessel formation to occur very quickly. "Inflammatory cells are able to easily penetrate and degrade the hydrogel, enabling blood vessels to fill in and support wound healing and the growth of new tissue," she said. For burns, the faster this process occurs, Gerecht added, the less there is a chance for scarring.

Originally, her team intended to load the gel with stem cells and infuse it with growth factors to trigger and direct the tissue development. Instead, they tested the gel alone. "We were surprised to see such complete regeneration in the absence of any added biological signals," Gerecht said.

Sun added, "Complete skin regeneration is desired for various wound injuries. With further fine-tuning of these kinds of biomaterial frameworks, we may restore normal skin structures for other injuries such as skin ulcers."

Gerecht and Harmon say they don't fully understand how the hydrogel dressing is working. After it is applied, the tissue progresses through the various stages of wound repair, Gerecht said. After 21 days, the gel has been harmlessly absorbed, and the tissue continues to return to the appearance of normal skin.

The hydrogel is mainly made of water with dissolved dextran, a polysaccharide (sugar molecule chains). "It also could be that the physical structure of the hydrogel guides the repair," Gerecht said. Harmon speculates that the hydrogel may recruit circulating bone marrow stem cells in the bloodstream. Stem cells are special cells that can grow into practically any sort of tissue if provided with the right chemical cue. "It's possible the gel is somehow signaling the stem cells to become new skin and blood vessels," Harmon said.


'/>"/>

Contact: Phil Sneiderman
prs@jhu.edu
443-287-9960
Johns Hopkins University
Source:Eurekalert  

Related medicine news :

1. Injection Drug Users Most in Need of Treatment, Study Says
2. Black heart attack patients wait longer for advanced treatment, University of Michigan study shows
3. Depressed, pregnant women receive inconsistent treatment, have longer hospital stays
4. Calorie-burning brown fat is a potential obesity treatment, researchers say
5. Curcumin compound improves effectiveness of head and neck cancer treatment, U-M study finds
6. Study: Most at-risk patients dont adhere to statin treatment, despite real benefits
7. HIV rate in SF could be cut sharply with expanded treatment, study predicts
8. Lung Cancer Evolves With Treatment, Study Finds
9. BNCT, a new-generation radiation treatment, is effective in advanced head and neck cancer
10. Few women seek help for sexual issues after cancer treatment, but many want it
11. Depression drug may relieve pain from breast cancer treatment, U-M study finds
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
In third-degree burn treatment, hydrogel helps grow new, scar-free skin
(Date:2/8/2016)... SC (PRWEB) , ... February 08, 2016 , ... Steve ... areas with a vital new community enrichment program, has teamed up with Citizens Opposed ... and children suffering from intimate abuse. To support all those victimized by the fear ...
(Date:2/8/2016)... ... ... Remember the old saying “rub some dirt on it”? Perhaps you should ... Bentonite Clay” the health benefits of integrating clay into a daily diet are numerous, ... former motivational speaker, Perry A~ has since dedicated her life to learning about the ...
(Date:2/8/2016)... ... February 08, 2016 , ... The ... important news! AHCC and the Home Health and Hospice ICD-10 Transition Workgroup are ... official ICD coding guidance and clarifications, to address concerns over the use of ...
(Date:2/8/2016)... ... 2016 , ... According to research by the National Association ... to be certified or obtain continuing education. To increase patient awareness of the ... Mouth?” campaign to inform dentists and patients about the possible lack of skills ...
(Date:2/6/2016)... ... February 06, 2016 , ... ... NURSES EXPECTED AT AORN SURGICAL CONFERENCE & EXPO , WHAT:     , This ... an estimated 5000 perioperative nurses in attendance to study the latest evidence-based ...
Breaking Medicine News(10 mins):
(Date:2/8/2016)... ANN ARBOR, Mich. , Feb. 8, 2016 /PRNewswire-USNewswire/ ... Ann Arbor announced today that, as part ... will become one of the first hospitals in the ... Karin Muraszko , M.D., U-M,s chair of ... U-M,s chair of neurosurgery. --> The ...
(Date:2/8/2016)... 2016 Velano Vascular, a medical technology company ... and their practitioners, announced today that the company has ... use the proceeds from this financing, an extension of ... 2015, to support the development and commercialization of the ... Philadelphia , and a ...
(Date:2/8/2016)... 2016  HemaFlo Therapeutics, Inc. announced today that the United ... Number 9,119,880 covering the use of NephroFlow to treat acute ... HemaFlo,s founder, said, "We are pleased to secure our rights ... Peterson , PhD, HemaFlo,s founder, said, "We are pleased to ... --> Dale Peterson , PhD, HemaFlo,s founder, said, ...
Breaking Medicine Technology: