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April 2015 | Volume 14 | Issue 4 | Features | 427 | Copyright © April 2015


higher frequency (all grades) in the combination arm compared to the Zelboraf arm included diarrhea (57 vs. 28 percent), nausea (39 vs. 24 percent), photosensitivity (28 vs. 16 percent), lab value abnormalities (increased alanine aminotransferase [ALT, 24 vs. 18 percent], increased aspartate aminotransferase [AST, 22 vs. 13 percent], increased CPK [30 vs. 3 percent]) and vomiting (21 vs. 12 percent). Common adverse events observed at a lower frequency in the combination arm included hair loss (14 vs. 29 percent), thickening of the outer layer of the skin (10 vs. 29 percent) and joint pain (33 vs. 40 percent). Most instances of each common adverse event were Grade 1 or 2 in severity.
Other select adverse events that were lower in the combination arm included cutaneous squamous cell carcinomas (3 vs. 11 percent; all grades) and keratoacanthomas (<1 vs. 8 percent; all grades). Serous retinopathy (collection of fluid under the retina) was observed at a higher frequency in the combination arm (20 vs. <1 percent) with most of these events either Grade 1 or 2 and temporary in nature. Specific adverse events leading to withdrawal from treatment were similar in both study arms, as was the overall discontinuation rate from treatment (13 vs. 12 percent).

Soligenix and Cutaneous T-Cell Lymphoma

Soligenix, Inc. has announced that its SGX301 (synthetic hypericin) development program for the first-line treatment of cutaneous T-cell lymphoma (CTCL) has received "Fast Track" designation from the FDA.
Fast track is a designation that the FDA reserves for a drug intended to treat a serious or life-threatening condition and one that demonstrates the potential to address an unmet medical need for the condition. Fast track designation is designed to facilitate the development and expedite the review of new drugs. For instance, should events warrant, Soligenix will be eligible to submit a new drug application (NDA) for SGX301 on a rolling basis, permitting the FDA to review sections of the NDA prior to receiving the complete submission. Additionally, NDAs for fast track development programs ordinarily will be eligible for priority review, which imparts an abbreviated review time of approximately six months.
SGX301 is a novel first-in-class photodynamic therapy utilizing safe visible light for activation. The active ingredient in SGX301 is synthetic hypericin, a potent photosensitizer which is topically applied to skin lesions and then activated by fluorescent light 16 to 24 hours later. Combined with photoactivation, hypericin has demonstrated significant anti-proliferative effects on activated normal human lymphoid cells and inhibited growth of malignant T-cells isolated from CTCL patients. In a published Phase 2 clinical study in CTCL, patients experienced a statistically significant (p < 0.04) improvement with topical hypericin treatment whereas the placebo was ineffective: 58.3% compared to 8.3%, respectively. SGX301 has received orphan drug designation from the FDA.

FDA Approves VenaSeal Closure System

The FDA has approved the VenaSeal closure system to permanently treat varicose veins of the legs by sealing the affected superficial veins using an adhesive agent.
The VenaSeal system is intended for patients with superficial varicose veins of the legs that cause symptoms. The sterile kit is made up of an adhesive, a specially formulated n-butyl- 2-cyanoacrylate, and delivery system components that include a catheter, guidewire, dispenser gun, dispenser tips, and syringes.
The device must be used as a system and differs from procedures that use drugs, laser, radio waves or cuts in the skin to close or remove veins. A trained healthcare professional inserts the catheter through the skin into the diseased vein to allow injection of the VenaSeal adhesive, a clear liquid that polymerizes into solid material. The healthcare professional monitors proper placement of the catheter using ultrasound imaging during delivery of the adhesive into the diseased vein to seal it. The FDA reports that because the VenaSeal system does not incorporate heat application or cutting, the in-office procedure can allow patients to quickly return to their normal activities, with less bruising.
The FDA reviewed data for the VenaSeal system in a premarket approval application, the agency’s pathway to evaluate safety and effectiveness of Class III medical devices. Data supporting the FDA approval included results from three clinical studies sponsored by the manufacturer. The U.S. clinical study assessed the safety and effectiveness of the VenaSeal system in 108 participants compared to radio-frequency ablation in 114 participants. The trials showed the device to be safe and effective for vein closure for the treatment of symptomatic superficial varicose veins of the legs.
The VenaSeal system should not be used in patients who have a known hypersensitivity to the VenaSeal adhesive, acute inflammation of the veins due to blood clots or acute whole-body infection. Adverse events observed in the trial—and generally associated with treatments of this condition— included vein inflammation (phlebitis) and burning or tingling (paresthesia) in the treatment zone.

Restylane

Galderma has announced the launch of Restylane® Silk, the first and only dermal filler approved by the FDA for lip enhancement and the treatment of wrinkles and lines around the mouth in people over the age of 21. Restylane® Silk is a smooth gel designed to restore natural youthful definition and symmetry to the lip and mouth area.
In a clinical study involving 221 patients, investigators observed that 77% of patients treated with Restylane® Silk showed an improvement in lip fullness 8 weeks after treatment and 59% of treated patients maintained lip fullness six months after treatment.