Category Archives: Stem Cell Therapy

Public release date: 11-Jun-2012 [ | E-mail | Share ]

Contact: Susan Martonik smartonik@snm.org 703-652-6773 Society of Nuclear Medicine

Miami Beach, Fla.Finding a way to restore hair growth after substantial hair loss is something of an obsession worldwide. Investigators at the Society of Nuclear Medicine's 2012 Annual Meeting presented how stem cell research for the development of new hair follicles can be monitored with an optical imaging technique that uses bioluminescence, the same process that allows fireflies to light up.

There is a host of treatments available for hair loss, including creams and drugs, but these have not shown to be very effective for hair growth. Hair stem cells signal the actual regeneration of hair follicles and natural hair. A molecular imaging technique called bioluminescence is used to display processes at the cellular level. Bioluminescent signal is generated in specific chemical substances called substrates. These signals are easily recognized with very sensitive optical imaging systems that can see what is happening in the smallest placesin this case in hair stem cells.

"Hair regeneration using hair stem cells is a promising therapeutic option emerging for hair loss, and molecular imaging can speed up the development of this therapy," saysByeong-Cheol Ahn, M.D., Ph.D., professor and director of the department of nuclear medicine at Kyungpook National University School of Medicine and Hospital in Daegu, South Korea. "This study is the first study of hair follicle regeneration using an in vivo molecular imaging technique."

The current research involves grafting hair stem cells in animal models to investigate if they can grow and proliferate as normal cells do. The progress of hair stem cell therapy is non-invasivelytracked with bioluminescentreporter genes in specialized substrates. There are several bioluminescent reporter genes originating fromnot only fireflies, but also beetles, glowworms and other bioluminescent organisms. The strategy of using bioluminescent reporter genesis ideal for stem cell research, because bioluminescence works only in living cells.

In this study, researchers used bioluminescence imaging usingfirefly luciferase coupled with D-luciferin to monitor the engraftment of hair follicle stem cellscalled newborn fibroblastsin mice to track their viability and development into hair folliclesover time. Bioluminescence imaging was performed five times over the course of 21 days after transplantation of the stem cells.

Results of the study showed successful bioluminescence imaging forhair regeneration with hair stem cell transplantation, and new hair follicles were apparent on the surface of skin samples under microscope. More studies will have to be conducted before clinical trials could be initiated to verify whether this therapy would work for human hair regeneration.

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Scientific Paper 74: Jung Eun Kim, Byeong-Cheol Ahn, Ho Won Lee, Mi-hye Hwang, Sang-Woo Lee and Jaetae Lee, Nuclear Medicine, Kyungpook National University School of Medicine, Daegu, Republic of Korea; Seng Hyun Shin and Young Kwan Sung, Immunology, Kyungpook National University School of Medicine, Daegu, Republic of Korea, "In vivo monitoring of survival and proliferation of hair stem cells in hair follicle regeneration animal model," SNM's 59th Annual Meeting, June 9, 2012, Miami Beach, Fla.

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Bioluminescence imaging lights up stem cell therapy for hair growth

In Early Study, Procedure Helps Teens Halt Insulin Injections

June 11, 2012 (Philadelphia) -- In an early study, an experimental stem cell procedure helped 15 teens with type 1 diabetes stay off of insulin injections for about 1.5 years, on average.

The study was very small, and the procedure is not ready for widespread use. "We now have a unique approach with some positive findings, but it's still early. We need to better understand the biology behind the treatment and follow patients for long-term side effects," Robert E. Ratner, MD, chief scientific and medical officer of the American Diabetes Association, tells WebMD.

This is the latest of several stem cell studies to show promising results for the treatment of type 1 diabetes, Ratner notes.

In the new study, 15 of 28 teens with type 1 diabetes who got an experimental treatment using their own stem cells went into remission and did not need insulin injections for an average of about 1.5 years.

The "cocktail treatment" combines stem cell therapy with drugs that suppress the body's immune system. In type 1 diabetes, the immune system attacks and destroys insulin-producing cells within the pancreas.

The experimental treatment is called autologous nonmyeloablative hematopoietic stem cell transplantation (HSCT). It aims to kill the destructive immune system cells and replace them with immature stem cells not programmed to destroy insulin-producing cells.

First, patients are given drugs to stimulate production of blood stem cells. The blood stem cells are then removed from the body and frozen. Then, patients are hospitalized and given drugs to kill the destructive immune system cells. The harvested blood stem cells are then put back into the patient.

Eight teens who took part in the study have remained insulin-free for two years, on average. One patient has gone without insulin injections for 3.5 years.

"All our patients considered the [treatment] to be worthwhile and beneficial, though some patients experienced side effects," study head Weiqiong Gu, MD, of Ruijin Hospital in Shanghai, tells WebMD.

Read more:
Experimental Stem Cell Treatment Tested for Type 1 Diabetes