StemCell Therapy

(NaturalNews) Many components of the modern western diet – meats, fish, dairy products, most grains, sugars, alcohol and caffeinated drinks (in fact, almost everything except vegetables, millet, most fruits and, as we have just seen, apple cider vinegar) – contribute to one's body becoming too acidic. This in turn can open the door to a variety of problems, some of them (including arthritic complaints) potentially serious if this acidic condition persists for many years.

This is because your body will attempt to compensate by retaining alkaline salts in the bloodstream to offset the increase of tissue acidity. Since your body can only tolerate a small imbalance in blood pH (the acid-alkali balance), it will rob alkaline components from other places – including your body's precious alkaline reserves – in an effort to restore proper pH equilibrium. This can result in heartburn, digestive distress, stomach upset, fatigue and a multitude of other symptoms. Simple, inexpensive kitchen baking soda can fix this. Read more...

Joint Mender for Joint Care

For links to recent news items about CSC, visit this [Topsy] page. Examples of two news items that have received attention in the past week:?

(NaturalNews) Many components of the modern western diet – meats, fish, dairy products, most grains, sugars, alcohol and caffeinated drinks (in fact, almost everything except vegetables, millet, most fruits and, as we have just seen, apple cider vinegar) – contribute to one's body becoming too acidic. This in turn can open the door to a variety of problems, some of them (including arthritic complaints) potentially serious if this acidic condition persists for many years.

This is because your body will attempt to compensate by retaining alkaline salts in the bloodstream to offset the increase of tissue acidity. Since your body can only tolerate a small imbalance in blood pH (the acid-alkali balance), it will rob alkaline components from other places – including your body's precious alkaline reserves – in an effort to restore proper pH equilibrium. This can result in heartburn, digestive distress, stomach upset, fatigue and a multitude of other symptoms. Simple, inexpensive kitchen baking soda can fix this. Read more...

Joint Mender for Joint Care

For links to recent news items about CSC, visit this [Topsy] page. Examples of two news items that have received attention in the past week:?

OCEANSIDE, CA –May 5, 2010 – International Stem Cell Corporation (ISCO.OB), http://www.intlstemcell.com, today announced it has entered into a definitive agreement dated May 4, 2010 (‘the Agreement”) with Socius CG II, Ltd. (“Socius”), pursuant to which Socius has committed to purchase a single tranche of up to $10 million in non-convertible Series F Preferred Stock (the "Preferred Stock") from ISCO. The Company issued a warrant to purchase $13,500,000 worth of the Company’s Common Stock, the exercise price of the warrant being determined by the closing bid price for the Company’s Common Stock on the trading day immediately preceding the date the Company initiates the sale of the Series F Preferred.

The Company anticipates that the Closing of the Preferred Stock sale will take place 20 business days after the issuance of the Warrants. Proceeds from these sales will be used to provide general working capital and to fund additional development of the Company's proprietary Parthenogenetic Stem Cell Lines, development of commercial research products, and other research and development programs and related business activities.

Additional details on the transaction are contained in the Company's Form 8-K filed today with the Securities and Exchange Commission.

A prospectus relating to this offering is available from:
Investor Relations
International Stem Cell Corporation
2595 Jason Court
Oceanside, CA 92056

ABOUT INTERNATIONAL STEM CELL CORPORATION (ISCO.OB):
International Stem Cell Corporation is a California-based biotechnology company focused on therapeutic and research products. ISCO’s core technology, parthenogenesis, results in creation of pluripotent human stem cells from unfertilized oocytes (eggs). ISCO scientists have created the first parthenogenic, homozygous stem cell line that can be a source of therapeutic cells with minimal immune rejection after transplantation into hundreds of millions of individuals of differing sexes, ages and racial groups. This offers the potential to create the first true stem cell bank, UniStemCell™, while avoiding the ethical issue of using fertilized eggs. ISCO also produces and markets specialized cells and growth media for therapeutic research worldwide through its subsidiary Lifeline Cell Technology.

FORWARD-LOOKING STATEMENTS:
Statements pertaining to anticipated future events, including the anticipated closing of the sale of Preferred Stock, along with other statements about the future expectations, beliefs, goals, plans, or prospects expressed by management constitute forward-looking statements. Any statements that are not historical fact (including, but not limited to statements that contain words such as “will,” “believes,” “plans,” “anticipates,” “expects,” “estimates,”) should also be considered to be forward-looking statements. Forward-looking statements involve risks and uncertainties, including, without limitation, risks inherent in satisfying the conditions to closing. Actual results may differ materially from the results anticipated in these forward-looking statements and as such should be evaluated together with the many uncertainties that affect the company's business, particularly those mentioned in the cautionary statements found in the company's Securities and Exchange Commission filings. The company disclaims any intent or obligation to update these forward-looking statements.
Key Words: Stem Cells, Biotechnology, Parthenogenesis

CONTACTS:
International Stem Cell Corporation
Kenneth C. Aldrich, Chairman
760-940-6383
kaldrich@intlstemcell.com
Or
Brian Lundstrom, President
760-940-6383
bl@intlstemcell.com
WEST\21949392.1

OCEANSIDE, CA –May 5, 2010 – International Stem Cell Corporation (ISCO.OB), http://www.intlstemcell.com, today announced it has entered into a definitive agreement dated May 4, 2010 (‘the Agreement”) with Socius CG II, Ltd. (“Socius”), pursuant to which Socius has committed to purchase a single tranche of up to $10 million in non-convertible Series F Preferred Stock (the "Preferred Stock") from ISCO. The Company issued a warrant to purchase $13,500,000 worth of the Company’s Common Stock, the exercise price of the warrant being determined by the closing bid price for the Company’s Common Stock on the trading day immediately preceding the date the Company initiates the sale of the Series F Preferred.

The Company anticipates that the Closing of the Preferred Stock sale will take place 20 business days after the issuance of the Warrants. Proceeds from these sales will be used to provide general working capital and to fund additional development of the Company's proprietary Parthenogenetic Stem Cell Lines, development of commercial research products, and other research and development programs and related business activities.

Additional details on the transaction are contained in the Company's Form 8-K filed today with the Securities and Exchange Commission.

A prospectus relating to this offering is available from:
Investor Relations
International Stem Cell Corporation
2595 Jason Court
Oceanside, CA 92056

ABOUT INTERNATIONAL STEM CELL CORPORATION (ISCO.OB):
International Stem Cell Corporation is a California-based biotechnology company focused on therapeutic and research products. ISCO’s core technology, parthenogenesis, results in creation of pluripotent human stem cells from unfertilized oocytes (eggs). ISCO scientists have created the first parthenogenic, homozygous stem cell line that can be a source of therapeutic cells with minimal immune rejection after transplantation into hundreds of millions of individuals of differing sexes, ages and racial groups. This offers the potential to create the first true stem cell bank, UniStemCell™, while avoiding the ethical issue of using fertilized eggs. ISCO also produces and markets specialized cells and growth media for therapeutic research worldwide through its subsidiary Lifeline Cell Technology.

FORWARD-LOOKING STATEMENTS:
Statements pertaining to anticipated future events, including the anticipated closing of the sale of Preferred Stock, along with other statements about the future expectations, beliefs, goals, plans, or prospects expressed by management constitute forward-looking statements. Any statements that are not historical fact (including, but not limited to statements that contain words such as “will,” “believes,” “plans,” “anticipates,” “expects,” “estimates,”) should also be considered to be forward-looking statements. Forward-looking statements involve risks and uncertainties, including, without limitation, risks inherent in satisfying the conditions to closing. Actual results may differ materially from the results anticipated in these forward-looking statements and as such should be evaluated together with the many uncertainties that affect the company's business, particularly those mentioned in the cautionary statements found in the company's Securities and Exchange Commission filings. The company disclaims any intent or obligation to update these forward-looking statements.
Key Words: Stem Cells, Biotechnology, Parthenogenesis

CONTACTS:
International Stem Cell Corporation
Kenneth C. Aldrich, Chairman
760-940-6383
kaldrich@intlstemcell.com
Or
Brian Lundstrom, President
760-940-6383
bl@intlstemcell.com
WEST21949392.1

While the US government prints money to shore up failing and broken business models which no one likes but are considered simply too big (not too important or significant or even useful) to fail, Google is making money and investing it in start ups who expect nothing less than to create "disruptive, even world-changing technologies".

No suggestion here that GOOG is being altruistic, just that this is the way the new entrepreneur and investor class thinks. Opportunity and money are to be found in technologies that improve the way we live, work, play, eat, and think... and perhaps even improve the world.

To Google Ventures this has already meant wind farms, carbon emission reduction systems, green vehicles, and medical cures. To former Microsoft chief scientist Nathan Myhrvold and his high-level think tank, Intellectual Ventures, this means creating TerraPower - a company intending to revolutionize the nuclear power by developing reactors run on waste uranium - and also actively looking at regenerative medicine technologies.

Having formed the fund a little over a year ago, Google is only now starting to make a splash with the fund. Officially the fund has no specific industry focus saying on the Google Ventures website FAQ:

We are interested in a wide range of industries, including (but not limited to) consumer Internet, software, hardware, clean-tech, biotech, health care and others. First and foremost, we're looking for entrepreneurs who are tackling problems in creative and innovative ways, with the potential for significant financial return.

Unofficially and yet not so quietly, Google has named a few broad areas of interest. An article in Monday's New York Times quoted Google Ventures' managing partner, Bill Maris as saying that while they were not going to name particular investment themes, a few broad ares of interest include:

regenerative medicine, bioinformatics, cloud storage, companies that use large data sets, online monetization and mobile.

There it is. Regenerative medicine right there front and center.

In typical Google tradition, Maris, who looks all of 30 years old on the website, has a successfull and multidisciplinary track record. He was involved in founding Web hosting pioneer Burlee.com (now part of Web.com), where he built much of the key computing, network and technological infrastructure.Prior to that, Bill was a biotechnology and healthcare portfolio manager for Stockholm, Sweden-based Investor AB. Bill’s background also includes research at the Duke University Medical Center, Department of Neurobiology.

Google Ventures is said to be aiming at investing about $100 million a year. Any portion of that for regenerative medicine is more than welcome.

While traditional VC money remains reticent to back RM in any signifant way, Google's move confirms a trend we've been seeing and talking about at the Cell Therapy Group for the past 12 months or so. The multinational lifescience, biopharmaceutical, and healthcare companies along with strategic investors all now have regenerative medicine on their radar. They are all quietly and not-so quietly developing internal and external regenerative medicine strategies.

Please join us in welcoming regenerative medicine to the radar screen. It's bound to be an exciting ride ahead.

http://www.celltherapyblog.com hosted by http://www.celltherapygroup.com

Today the medical mafia struck another devastating blow to the health and freedom of all Americans. With the support of an inarguably corrupt Congress that has simply abandoned the real needs of the American people, the sick-care industry has locked in a high-profit scheme of disease and monopoly-priced pharmaceuticals in a nation that can ill afford either one.

And this Pharma-funded betrayal, it turns out, was led by the Democrats. Passed on a 219-212 vote that was only accomplished thanks to closed-door, last-minute secret meetings among the last holdouts, this new legislation puts America under the stranglehold of the medical mafia while doing absolutely nothing to address real health care reform. There is no mention in the bill Read more...

Youtharia for Anti-Aging & Longevity

Today the medical mafia struck another devastating blow to the health and freedom of all Americans. With the support of an inarguably corrupt Congress that has simply abandoned the real needs of the American people, the sick-care industry has locked in a high-profit scheme of disease and monopoly-priced pharmaceuticals in a nation that can ill afford either one.

And this Pharma-funded betrayal, it turns out, was led by the Democrats. Passed on a 219-212 vote that was only accomplished thanks to closed-door, last-minute secret meetings among the last holdouts, this new legislation puts America under the stranglehold of the medical mafia while doing absolutely nothing to address real health care reform. There is no mention in the bill Read more...

Youtharia for Anti-Aging & Longevity

For links to recent news items, visit these [Twitter] or [FriendFeed] pages. Examples of two news items that have received attention:?

• Distinct expression levels and patterns of stem cell marker, aldehyde dehydrogenase isoform 1 (ALDH1), in human epithelial cancers by Shan Deng and 15 co-authors, including George Coukos and Lin Zhang, PLoS ONE, 2010(Apr 21); 5(4): e10277 [Connbotea bookmark][PubMed Citation][OA full text]. Last sentence of the abstract:
  

  As a novel cancer stem cell marker, ALDH1 can be used for tumors whose corresponding normal tissues express ALDH1 in relatively restricted or limited levels such as breast, lung, ovarian or colon cancer.

• AACR: Are Cancer Stem Cells Vulnerable to Trastuzumab? By Ed Susman, MedPage Today (Apr 19) [FriendFeed entry][AACR10 abstract]. Excerpt:
  

  Mathematical modeling suggests that even in women whose breast cancer does not overexpress the HER-2 gene, treatment with trastuzumab (Herceptin) in the adjuvant setting could wipe out cancer stem cells, researchers reported here.

Five presentations at the 101th annual meeting of the American Association of Cancer Research were highlighted a news release from Geron Corporation (dated March 3, 2010). One presentation that had an explicit focus on CSC was this poster:

Imetelstat, a telomerase inhibitor in phase I trials in solid tumor and hematological malignancies, has broad activity against multiple types of cancer stem cells [Presentation Abstract].

Also mentioned in the news release was an oral presentation by Jerry W Shay, given as part of the Major Symposium entitled: Role of Telomeres and Telomerase in Chromosomal Stability and Disease [Session Detail]. The presentation was:

Role of telomerase in normal and neoplastic stem cells [Presentation Abstract].

Another poster about the telomerase inhibitor imetelstat (GRN163L) was:

Sensitivity and resistance of non-small cell lung cancer to the telomerase inhibitor imetelstat [Presentation Abstract].

Comments: A search of the ClinicalTrials.gov database for GRN163L revealed 6 trials. Four were ongoing, but not recruiting participants. Two were still recruiting: 1) Safety and Dose Study of GRN163L Administered to Patients With Refractory or Relapsed Solid Tumor Malignancies; 2) A Study of GRN163L With Paclitaxel and Bevacizumab to Treat Patients With Locally Recurrent Or Metastatic Breast Cancer.

An analogous search for imetelstat yielded the same 6 trials. All 6 trials have been sponsored by Geron Corporation.

For links to recent news items, visit these [Twitter] or [FriendFeed] pages. Examples of two news items that have received attention:?

• Distinct expression levels and patterns of stem cell marker, aldehyde dehydrogenase isoform 1 (ALDH1), in human epithelial cancers by Shan Deng and 15 co-authors, including George Coukos and Lin Zhang, PLoS ONE, 2010(Apr 21); 5(4): e10277 [Connbotea bookmark][PubMed Citation][OA full text]. Last sentence of the abstract:
  

  As a novel cancer stem cell marker, ALDH1 can be used for tumors whose corresponding normal tissues express ALDH1 in relatively restricted or limited levels such as breast, lung, ovarian or colon cancer.

• AACR: Are Cancer Stem Cells Vulnerable to Trastuzumab? By Ed Susman, MedPage Today (Apr 19) [FriendFeed entry][AACR10 abstract]. Excerpt:
  

  Mathematical modeling suggests that even in women whose breast cancer does not overexpress the HER-2 gene, treatment with trastuzumab (Herceptin) in the adjuvant setting could wipe out cancer stem cells, researchers reported here.

Five presentations at the 101th annual meeting of the American Association of Cancer Research were highlighted a news release from Geron Corporation (dated March 3, 2010). One presentation that had an explicit focus on CSC was this poster:

Imetelstat, a telomerase inhibitor in phase I trials in solid tumor and hematological malignancies, has broad activity against multiple types of cancer stem cells [Presentation Abstract].

Also mentioned in the news release was an oral presentation by Jerry W Shay, given as part of the Major Symposium entitled: Role of Telomeres and Telomerase in Chromosomal Stability and Disease [Session Detail]. The presentation was:

Role of telomerase in normal and neoplastic stem cells [Presentation Abstract].

Another poster about the telomerase inhibitor imetelstat (GRN163L) was:

Sensitivity and resistance of non-small cell lung cancer to the telomerase inhibitor imetelstat [Presentation Abstract].

Comments: A search of the ClinicalTrials.gov database for GRN163L revealed 6 trials. Four were ongoing, but not recruiting participants. Two were still recruiting: 1) Safety and Dose Study of GRN163L Administered to Patients With Refractory or Relapsed Solid Tumor Malignancies; 2) A Study of GRN163L With Paclitaxel and Bevacizumab to Treat Patients With Locally Recurrent Or Metastatic Breast Cancer.

An analogous search for imetelstat yielded the same 6 trials. All 6 trials have been sponsored by Geron Corporation.

It has been a long-time coming. It has been hyped and scoffed, bet against and hoped for, but now none of that matters. It's here. Dendreon has brought Provenge to market. Here, in the word's of the FDA...

FDA NEWS RELEASE

For Immediate Release: April 29, 2010

FDA Approves a Cellular Immunotherapy for Men with Advanced Prostate Cancer

The U.S. Food and Drug Administration today approved Provenge (sipuleucel-T), a new therapy for certain men with advanced prostate cancer that uses their own immune system to fight the disease.

Provenge is indicated for the treatment of asymptomatic or minimally symptomatic prostate cancer that has spread to other parts of the body and is resistant to standard hormone treatment.

Prostate cancer is the second most common type of cancer among men in the United States, behind skin cancer, and usually occurs in older men. In 2009, an estimated 192,000 new cases of prostate cancer were diagnosed and about 27,000 men died from the disease, according to the National Cancer Institute.

“The availability of Provenge provides a new treatment option for men with advanced prostate cancer, who currently have limited effective therapies available,” said Karen Midthun, M.D., acting director of the FDA’s Center for Biologics Evaluation and Research.

Provenge is an autologous cellular immunotherapy, designed to stimulate a patient’s own immune system to respond against the cancer. Each dose of Provenge is manufactured by obtaining a patient’s immune cells from the blood, using a machine in a process known as leukapheresis. To enhance their response against the cancer, the immune cells are then exposed to a protein that is found in most prostate cancers, linked to an immune stimulating substance. After this process, the patient’s own cells are returned to the patient to treat the prostate cancer. Provenge is administered intravenously in a three-dose schedule given at about two-week intervals.

The effectiveness of Provenge was studied in 512 patients with metastatic hormone treatment refractory prostate cancer in a randomized, double-blind, placebo-controlled, multicenter trial, which showed an increase in overall survival of 4.1 months. The median survival for patients receiving Provenge treatments was 25.8 months, as compared to 21.7 months for those who did not receive the treatment.

Almost all of the patients who received Provenge had some type of adverse reaction. Common adverse reactions reported included chills, fatigue, fever, back pain, nausea, joint ache and headache. The majority of adverse reactions were mild or moderate in severity. Serious adverse reactions, reported in approximately one quarter of the patients receiving Provenge, included some acute infusion reactions and stroke. Cerebrovascular events, including hemorrhagic and ischemic strokes, were observed in 3.5 percent of patients in the Provenge group compared with 2.6 percent of patients in the control group.

Provenge is manufactured by Seattle-based Dendreon Corp.

http://www.celltherapyblog.com hosted by http://www.celltherapygroup.com

It has been a long-time coming. It has been hyped and scoffed, bet against and hoped for, but now none of that matters. It's here. Dendreon has brought Provenge to market. Here, in the word's of the FDA...

FDA NEWS RELEASE

For Immediate Release: April 29, 2010

FDA Approves a Cellular Immunotherapy for Men with Advanced Prostate Cancer

The U.S. Food and Drug Administration today approved Provenge (sipuleucel-T), a new therapy for certain men with advanced prostate cancer that uses their own immune system to fight the disease.

Provenge is indicated for the treatment of asymptomatic or minimally symptomatic prostate cancer that has spread to other parts of the body and is resistant to standard hormone treatment.

Prostate cancer is the second most common type of cancer among men in the United States, behind skin cancer, and usually occurs in older men. In 2009, an estimated 192,000 new cases of prostate cancer were diagnosed and about 27,000 men died from the disease, according to the National Cancer Institute.

“The availability of Provenge provides a new treatment option for men with advanced prostate cancer, who currently have limited effective therapies available,” said Karen Midthun, M.D., acting director of the FDA’s Center for Biologics Evaluation and Research.

Provenge is an autologous cellular immunotherapy, designed to stimulate a patient’s own immune system to respond against the cancer. Each dose of Provenge is manufactured by obtaining a patient’s immune cells from the blood, using a machine in a process known as leukapheresis. To enhance their response against the cancer, the immune cells are then exposed to a protein that is found in most prostate cancers, linked to an immune stimulating substance. After this process, the patient’s own cells are returned to the patient to treat the prostate cancer. Provenge is administered intravenously in a three-dose schedule given at about two-week intervals.

The effectiveness of Provenge was studied in 512 patients with metastatic hormone treatment refractory prostate cancer in a randomized, double-blind, placebo-controlled, multicenter trial, which showed an increase in overall survival of 4.1 months. The median survival for patients receiving Provenge treatments was 25.8 months, as compared to 21.7 months for those who did not receive the treatment.

Almost all of the patients who received Provenge had some type of adverse reaction. Common adverse reactions reported included chills, fatigue, fever, back pain, nausea, joint ache and headache. The majority of adverse reactions were mild or moderate in severity. Serious adverse reactions, reported in approximately one quarter of the patients receiving Provenge, included some acute infusion reactions and stroke. Cerebrovascular events, including hemorrhagic and ischemic strokes, were observed in 3.5 percent of patients in the Provenge group compared with 2.6 percent of patients in the control group.

Provenge is manufactured by Seattle-based Dendreon Corp.

http://www.celltherapyblog.com hosted by http://www.celltherapygroup.com

I know I haven't been a very good blogger for quite some time but I wanted to pass on a letter I just received from my friend James Price as a Charter member of the Canadian Stem Cell Foundation. They're going for a Webby award. You don't have to be Canadian to support their cause - you just have to:

• believe in the power of interactive, online network-based activism,
  
• support the potential of stem cells to change people's lives, and
• wanna have a little fun raising awareness for our otherwise-sometimes-stodgy-science!

Go vote - it's good for you and the world! (WARNING: you might find out some things about some pretty cool stuff nominated in the other categories while you're there).

http://www.celltherapyblog.com hosted by http://www.celltherapygroup.com

I know I haven't been a very good blogger for quite some time but I wanted to pass on a letter I just received from my friend James Price as a Charter member of the Canadian Stem Cell Foundation. They're going for a Webby award. You don't have to be Canadian to support their cause - you just have to:

• believe in the power of interactive, online network-based activism,
  
• support the potential of stem cells to change people's lives, and
• wanna have a little fun raising awareness for our otherwise-sometimes-stodgy-science!

Go vote - it's good for you and the world! (WARNING: you might find out some things about some pretty cool stuff nominated in the other categories while you're there).

http://www.celltherapyblog.com hosted by http://www.celltherapygroup.com

(HealthDay News) -- Beetroot juice can boost physical stamina and increase exercise endurance by up to 16 percent, a new British study shows.

The researchers found that nitrate in beetroot juice reduces oxygen uptake to a degree that can't be achieved by any other means. The findings could benefit endurance athletes, elderly people and those with cardiovascular, respiratory or metabolic diseases, the study authors suggest.

The study included eight men, aged 19 to 38, who drank 500 milliliters a day of organic beetroot juice for six consecutive days. They then completed a series of tests on an exercise bike. The same tests were repeated after the men drank the same amount of a placebo (blackcurrant cordial) for six days.

After drinking the beetroot juice, the men were able to cycle for an average of 11.25 minutes -- 92 seconds longer than after consuming the placebo drink. The men also had a lower resting blood pressure after they drank the beetroot juice, the researchers found.

The study was published Aug. 6 in the Journal of Applied Physiology. Read more...

Joint Mender for Joint Care

When President Richard Nixon launched the war on cancer in his January 1971 State of the Union, he called for "the same kind of concentrated effort that split the atom and took man to the moon." Yet nearly 40 years and $100 billion in federally funded cancer research later, it seems the lunar landing was a much less daunting task.

[More]

There were two poster sessions on Cancer Stem Cell Therapeutics at the 101st Annual Meeting of the American Association for Cancer Research (AACR). The sessions, Cancer Stem Cell Therapeutics 1 and Cancer Stem Cell Therapeutics 2, took place on the morning and afternoon of April 20, 2010 [FriendFeed entry].

Two posters presented in the 2nd session have been highlighted in a news release. See: Alchemia’s HyACT Technology Enhances the Killing of Cancer Stem Cell Populations in Breast and Colorectal Cancer, Business Wire, April 20, 2010 [FriendFeed entry]. One of these is Poster #4293: Evaluation of activated CD44 as a biological target in the eradication of breast cancer stem cells, by Vera J Evtimov and Tracey J Brown [Presentation Abstract]. The other is Poster #4278: HA-Irinotecan targeting of activated CD44 is an effective therapy for the eradication of putative colon cancer stem cells [Presentation Abstract].