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JCI Journals


Drug's potential adverse side effect explained

A new study suggests that PPAR-gamma agonists, used to treat diabetes, may cause heart failure due to fat accumulation and cell dysfunction. Increased activity of the receptor leads to glucolipotoxicity, a condition characterized by deterioration in heart function.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 6, 2007

Hunger hormone fights aging in the thymus

Research suggests that ghrelin improves thymic mass and T cell output with increased diversity of the TCR repertoire in mice, highlighting its potential as a therapeutic approach to boost immune function in elderly or immunocompromised individuals.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 6, 2007

JCI table of contents: Sept. 6, 2007

Researchers discover ghrelin promotes thymopoiesis during aging, boosting T cell output, while also finding PPAR-gamma agonists exacerbate cardiac dysfunction due to glucolipotoxicity. Additionally, a study finds osteopontin deficiency in mice leads to improved insulin sensitivity despite obesity.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 6, 2007

JCI table of contents: Sept. 4, 2007

Researchers found that immunosuppressive drugs suppress beta-cell regeneration in diabetic mice, raising questions about the potential of successful regenerative islet transplantation. Meanwhile, a new study demonstrated that eIF4E-specific antisense oligonucleotides reduce tumor growth without causing damage to normal tissues.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 4, 2007

Inhaling helps heal liver transplant recipients

A new study suggests that inhaling nitric oxide during liver transplantation can decrease hospital stay time and improve liver function. The authors found increased levels of nitrite in circulation, which may mediate the beneficial effects of NO inhalation.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 23, 2007

JCI table of contents: Aug. 23, 2007

Researchers found that FTY720 prevents disease in mouse models of leukemia caused by the cancer protein BCR-ABL. Nitric oxide inhalation also accelerates restoration of liver function after transplantation, reducing hospital stay times.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 23, 2007

New weapon to fight leukemia

Researchers at Ohio State University have identified a new potential treatment for leukemia, FTY720, which prevents disease in mouse models of various leukemias. The drug activates tumor suppressor PP2A, reactivating it in cancer cells.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 23, 2007

Can cancer drugs combine forces?

Researchers suggest treating CML patients with a combination of imatinib and dasatinib to prevent BCR-ABL mutants that are resistant to both drugs. A study found that combining the two drugs can increase time before relapse or decrease chance of cancer return.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 16, 2007

JCI table of contents: Aug. 16, 2007

Researchers investigating chronic myeloid leukemia treatment options suggest combining drugs to combat resistance, while others explore targeting prostaglandin E2 receptor EP1 for hypertension therapy. Additionally, a study reveals that Sphingosine 1-phosphate receptor 2 deficiency prevents abnormal blood vessel formation in the retina.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 16, 2007

Specific antagonism lowers blood pressure

Researchers identified EP1 as a key factor in blood pressure regulation and found that inhibiting it can reduce hypertension. Targeting this receptor subtype may be a viable approach to treating high blood pressure.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 16, 2007

JCI table of contents: Aug. 9, 2007

A study published in JCI reveals that Gq/G11-mediated signaling plays a crucial role in transmitting TSH-induced signals, regulating thyroid gland function. Mice lacking the alpha-subunits of both Gq and G11 exhibited reduced thyroid gland function and symptoms similar to hypothyroidism.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 9, 2007

New molecular regulators of hyperthyroidism and goiter

A study published in JCI Journals reveals that Gq/G11-mediated signaling plays a crucial role in regulating thyroid gland function. Mice lacking these proteins had impaired thyroid function and symptoms similar to hypothyroidism, highlighting their potential as therapeutic targets for hyperthyroidism.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 9, 2007

Developing a more effective vaccine for tuberculosis

Researchers have discovered a new vaccine strategy that effectively protects mice and guinea pigs from tuberculosis, targeting immune cells known as CD8+ T cells. The study suggests a potential breakthrough in developing a more effective vaccine for all individuals, including adolescents and adults.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 1, 2007

JCI table of contents: August 1, 2007

Researchers developed a new vaccine strategy that uses a protein-free M. Tuberculosis strain to activate immune cells, providing increased protection against TB. A study found that vaccination with this strain provided better protection than the existing BCG vaccine.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 1, 2007

JCI table of contents -- July 26, 2007

A study published in JCI found that bacteria residing in the gut boost immune response to tumors after total body irradiation, a common treatment for cancer. The researchers discovered that a specific population of bacteria plays a crucial role in augmenting the function of tumor-specific T cells and resulting in tumor regression.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 26, 2007

JCI table of contents: July 19, 2007

A study on mucins reveals their crucial role in protecting the gut from bacterial infection. In contrast, lupus research identifies shared signaling networks active in B cells from genetically distinct mouse models. Meanwhile, a new study shows that blocking ERK1/2 activation can prevent congenital heart defects in mice with Noonan syn...

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 19, 2007

Mucins stand guard against gut infections

Researchers have discovered that cell surface mucin 1 (Muc1) is a key component of the gut's defense against bacterial infections. Mice infected with Campylobacter jejuni were found to be more susceptible to intestinal damage without Muc1, highlighting its critical role in preventing infection spread.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 19, 2007

Src inhibitors may prove beneficial in breast cancer therapy

Researchers found that Src, a protein that cooperates with estrogen to break down ER-alpha, is overexpressed in ER-alpha–negative breast cancers. Src inhibition was shown to impair estrogen-stimulated ER-alpha proteolysis, suggesting that Src may stimulate estrogen-dependent ER-alpha degradation in these tumors.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 12, 2007

JCI table of contents: July 12, 2007

Researchers found that Src inhibitors can target aggressive breast cancers, which lack estrogen receptors and are more prone to growth. By inhibiting the protein Src, these treatments show promise in improving patient outcomes.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 12, 2007

JCI Table of Contents -- July 2, 2007

Two studies published in JCI uncover regulators of squamous cell carcinoma development, highlighting the critical role of p53 tumor suppressor gene mutations and chemokine receptor D6. The findings suggest that certain p53 mutations accelerate SCC progression and that inflammation sensitizes skin cells to tumor formation.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 2, 2007

p53 gene mutations and inflammation trigger skin cancer

Research reveals that p53 gene mutations can trigger skin cancer, particularly squamous cell carcinoma (SCC), by accelerating malignant progression and sensitizing skin cells to tumor formation. Inflammation also plays a critical role in SCC development, with the chemokine receptor D6 acting as a key regulator.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 2, 2007

JCI table of contents: June 21, 2007

Researchers found that a nutritionally balanced diet high in omega-3 fatty acid reduced prostate tumor growth and increased survival in genetically predisposed mice. Omega-6 fatty acids had the opposite effects. The study suggests a beneficial effect of omega-3 polyunsaturated fatty acids on delaying human prostate cancer.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJun 21, 2007

JCI table of contents: June 14, 2007

Researchers found that TRAIL limits inflammation and brain cell death in bacterial meningitis by regulating the host immune response. In contrast, mice lacking TRAIL exhibited increased inflammation and brain cell death, which was reversed by administering recombinant TRAIL.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJun 14, 2007

JCI table of contents: June 7, 2007

Researchers at Institut Gustave Roussy found that a combination of radiation and angiogenesis inhibitors can overcome HIF-1–dependent tumor radioresistance in mice. This breakthrough suggests a new approach to treating cancer by shifting tumor resistance towards apoptosis, according to the study published online on June 7.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJun 7, 2007

Combination therapy reduces tumor resistance to radiation

Researchers have found that a combination of radiation treatment and angiogenesis inhibitors can overcome tumor radioresistance by inducing apoptosis in tumor cells. This dual therapy approach shows promise in treating tumors resistant to radiation, offering a new potential treatment strategy.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJun 7, 2007

JCI table of contents -- June 1, 2007

Researchers found that pregnant women's exposure to the flu vaccine stimulates the development of immune cells in their babies. The study used a new technique to detect antigen-specific T cells and showed that B and T cell responses occur in utero following maternal vaccination against influenza.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJun 1, 2007

JCI table of contents: May 24, 2007

A study by Arlette Darfeuille-Michaud and colleagues reveals that CEACAM6 expression promotes adherent-invasive E. coli's colonization in intestinal epithelial cells of patients with Crohn's disease, indicating a potential diagnostic marker for the condition. Meanwhile, another study by Andrea Hevener and colleagues shows that macropha...

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMay 24, 2007

Role of TRPM8 in the development of prostate cancer

Research suggests that TRPM8 is overexpressed in prostate cancer cells, indicating its potential as a therapeutic target. The study also found that endoplasmic reticulum TRPM8 retains functional activity regardless of cell differentiation status, which may contribute to cancer cell growth.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMay 17, 2007

JCI table of contents -- May 17, 2007

Researchers found that TRPM8 is expressed in mature, differentiated human prostate primary epithelial luminal cells, but also in prostate cancer cells. The study suggests that inhibiting ER-TRPM8 or PM-TRPM8 may be a potential therapeutic approach for treating prostate cancer. Additionally, the authors propose that blocking aggrecanase...

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMay 17, 2007

JCI table of contents: May 10, 2007

Researchers found that a gene deficiency in CalDAG-GEFI may explain the loss of platelet function leading to recurrent bleeding in patients with leukocyte adhesion deficiency III. Additionally, IL-33 and ST2 signaling was identified as a critical mechanism for protecting the heart from stress, suggesting potential new therapeutic targets.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMay 10, 2007

JCI table of contents: May 1, 2007

Researchers have found that mice lacking organic cation transporter 1 (OCT1) exhibit reduced metformin effects on AMPK phosphorylation and glucose control. Additionally, seven mutations in OCT1 were identified in humans, which reduce metformin uptake, indicating the importance of OCT1 in mediating metformin's therapeutic effects.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMay 1, 2007

Why cisplatin kills breast cancer cells when other drugs fail

Triple-negative breast cancer cells are sensitive to cisplatin due to increased expression of delta-Np63 and TAp73 proteins. Cisplatin releases TAp73 from delta-Np63, leading to cell death. This study suggests using cisplatin as an early treatment option for individuals with triple-negative breast cancer.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateApr 19, 2007

JCI table of contents -- April 19, 2007

Triple-negative breast cancer cells are sensitive to cisplatin, a common chemotherapeutic drug that can be effective in treating the disease. Researchers also found that delta-Np63 and TAp73 proteins play a crucial role in mediating chemosensitivity to cisplatin.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateApr 19, 2007

JCI table of contents: April 12, 2007

A study found that inhibiting the protein ATM can kill cancer cells with dysfunctional DNA repair pathways, offering hope for a new treatment. Additionally, researchers discovered that inhibiting the protein CaMKII can drive leukemic cells to mature and die, providing an alternative strategy for treating acute promyleocytic leukemia.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateApr 12, 2007

Tumors stopped from spreading to new sites

Researchers found that TGF-beta inhibitors can block lung metastases in breast cancer mice treated with radiation or doxorubicin. Monitoring TGF-beta levels could identify at-risk patients for metastatic cancer progression.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateApr 5, 2007

JCI table of contents -- April 5, 2007

Researchers at Vanderbilt University found that treatment with TGF-beta inhibitors may help prevent cancer metastasis in patients. Additionally, a study from the University of Michigan discovered that a negative feedback pathway involving leptin receptor signaling may contribute to leptin resistance in obese individuals.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateApr 5, 2007

Is there such a thing as too much sugar?

A study published in JCI Journals found that glucose reperfusion triggers more extensive neuronal death in hypoglycemic mice than prolonged hypoglycemia itself. Gradual increase of blood glucose levels may be a better approach to treat individuals in hypoglycemic coma, but the findings are subject to further clarification.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateApr 2, 2007

JCI table of contents: April 2, 2007

Researchers found that hypoglycemic neuronal death is triggered by glucose reperfusion and activation of NADPH oxidase. Treatment with CD40Ig allows rats to accept heart grafts from non-genetically identical donors by enhancing regulatory immune cells.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateApr 2, 2007