Publicações de David GONNELLI (9)

IL-22 and IL-22 binding protein (IL-22BP) regulate fibrosis and cirrhosis in hepatitis C virus and schistosome infections.

Apr, 2015

Interleukin (IL)-22 acts on epithelia, hepatocytes, and pancreatic cells and stimulates innate immunity, tissue protection, and repair. IL-22 may also cause inflammation and abnormal cell proliferation. The binding of IL-22 to its receptor is competed by IL-22 binding protein (IL-22BP), which may limit the deleterious effects of IL-22. The role of IL-22 and IL-22BP in chronic liver diseases is unknown. We addressed this question in individuals chronically infected with schistosomes or hepatitis C virus (HCV). We first demonstrate that schistosome eggs stimulate production of IL-22 transcripts and inhibit accumulation of IL22-BP transcripts in schistosome-infected mice, and that schistosome eggs selectively stimulate production of IL-22 in cultures of blood leukocytes from individuals chronically infected with Schistosoma japonicum. High IL-22 levels in cultures correlated with protection against hepatic fibrosis and portal hypertension. To test further the implication of IL-22/IL-22BP in hepatic disease, we analyzed common genetic variants of IL22RA2, which encodes IL-22BP, and found that the genotypes, AA, GG of rs6570136 (P = 0.003; odds ratio [OR] = 2), and CC, TT of rs2064501 (P = 0.01; OR = 2), were associated with severe fibrosis in Chinese infected with S. japonicum. We confirmed this result in Sudanese (rs6570136 GG [P = 0.0007; OR = 8.2], rs2064501 TT [P = 0.02; OR = 3.1]), and Brazilians (rs6570136 GG [P = 0.003; OR = 26], rs2064501 TC, TT (P = 0.03; OR = 11]) infected with S. mansoni. The aggravating genotypes were associated with high IL22RA2 transcripts levels. Furthermore, these same variants were also associated with HCV-induced fibrosis and cirrhosis (rs6570136 GG, GA [P = 0.007; OR = 1.7], rs2064501 TT, TC (P = 0.004; OR = 2.4]). Ler mais

Hepatology (Baltimore, Md.)

[Hypogastric abdominal wall reconstruction with a pedicled anterolateral thigh flap].

Oct, 2014

Looking at a full-thickness abdominal wall defect, it is necessary to use reconstructive surgery techniques. The authors present an original case of reconstruction of the abdominal wall, using an anterolateral thigh flap (ALT) harvested with vascularised fascia lata. We describe the advantages of this technique, which has rarely been used for this indication. An 80-year-old woman presenting a full-thickness abdominal wall defect of 15×18cm was reconstructed by a pedicled ALT flap. Skin wound healing was obtained within 15 days, with no complication. There was no donor site sequela. The pedicled ALT flap appears to be a good solution for hypogastric abdominal wall defect in a one step procedure. Vacularised fascia lata bring with the cutaneous flap is useful to reconstruct the abdominal fascia. Ler mais

Annales de chirurgie plastique et esthetique

[Differential diagnosis between keloid and hypertrophic scars: a new approach by full-field optical coherence tomography].

Aug, 2014

To evaluate the efficacy of full-field optical coherence tomography to differentiate hypertrophic and keloid scars on ex-vivo tissues. Ler mais

Annales de chirurgie plastique et esthetique Carregar mais  

[Establishment of a keloid model by transplanting human keloid onto the backs of nude mice].

Aug, 2014

Keloid scar is a proliferative healing dysfunction formed by an excessive build-up of collagen fibers on the dermis. It is responsible of aesthetic and functional disabilities. There is no ideal treatment and recurrence occurs very often. Keloid scars occur only to human, that's why animal model needs to be made to study this pathology and new treatments. Few models have been described using human keloid scars implanted into subcutaneous tissue of nude mice or rat. To allow study of topical and laser treatment we have developed a new animal model using human keloid scar fragment with epidermal and dermal tissue implanted into back of nude mice like a full thickness skin graft. Keloid fragments from five donors have been grafted onto 40 nudes mice. Macroscopic and microscopic studies have been made at day 28, 56, 84 and 112. We observed integration of the fragments in all cases. Hyalinized collagen bundles were observed in all implant biopsies confirming the stability of the keloid architecture within 112 days. This model is easily reproducible and allows the study of topical treatment and laser due to the accessibility of the keloid. Ler mais

Annales de chirurgie plastique et esthetique

[Two anomalous muscles of a forearm revealed by ulnar nerve compressions, a Double Crush syndrome].

Jun, 2014

This article describes the concomitant presence of two anomalous muscles on a left forearm in a 40-year-old man. The anconeus epitrochlearis muscle was responsible for a cubital tunnel syndrome and the unusual origin of the flexor digiti minimi brevis muscle was responsible for a compartment syndrome with ulnar nerve compression at the level of Guyon's canal during effort diagnosed by MRI. Resection of these muscles relieved the symptoms and allowed the patient to return to work. Ler mais

Annales de chirurgie plastique et esthetique

[Role of the plastic surgeon in the management of ecthyma gangrenosum in children: clinical example].

Aug, 2012

Ecthyma gangrenosum is a cutaneous infection, which result from a Pseudomonas aeruginosa septicemia, encountered in most of the case in immunocompromised people. Authors demonstrate the important role of the plastic surgeon in the diagnosis and therapeutic management of the disease in children. An eight-month-old infant has been hospitalized for acute leukaemia. She developed an extensive painful macule in the buttocks and perineal area in a septic context. A multidisciplinary management allowed to set up an adapted antibiotherapy, an early escharrotomy, a protection of the wound by digestive and urine derivation and a reconstruction with wound healing by second intention and split thickness skin graft, which lead to a good quality cure and wound healing at the end of 37 days of evolution. This case demonstrates the importance of the surgical management in the treatment of ecthyma gangrenosum. The wound healing associated with a split thickness skin graft seems to be the less invasive solution in a frail patient and the fastest to re-start the chemotherapy. Ler mais

Annales de chirurgie plastique et esthetique

[Driving licence and hand surgery].

Feb, 2011

In hand surgery, the patient often asks his surgeon if he is authorized to drive his car after the intervention. It is very difficult to answer making the distinction between medicolegal reality and misconceptions. Authors try to offer relevant answers. Ler mais

Chirurgie de la main

[Surgical managing of current cutaneous infections in children].

Sep, 2010

The cutaneous infectious pathology of the child is varied and frequent. Authors deal with surgical infections seen in current pediatrics, which often have to appeal to a plastic pediatric surgeon for their treatment. Superficial infections of skin and pilo-sebaceous follicles are common in big children. The folliculitis and the boil are the most frequent. Their treatment is medical and surgical and does not require an antibiotic treatment in most of the cases. The primitive abscesses or following an anterior lesion recover from a similar treatment. Some localizations or risky context need a particular follow-up. The whitlow is a particular example and needs to have a particular follow-up because of the risk of hand cellulitis. Nails embodied of the child require a specialized notice because of their numerous clinical forms, which must be distinguished according to the age. Finally the necrotizing cellulitis and fasciitis are surgical emergencies and have a well-codified treatment. These infections in children must benefit from an attentive care because when they are badly treated, they can involve the aesthetic, functional and vital forecast. Ler mais

Archives de pediatrie : organe officiel de la Societe francaise de pediatrie

Scar prevention using Laser-Assisted Skin Healing (LASH) in plastic surgery.

Aug, 2010

The use of lasers has been proposed for scar revision. A recent pilot clinical study demonstrated that lasers could also be used immediately after surgery to reduce the appearance of scars. The LASH (Laser-Assisted Skin Healing) technique induces a temperature elevation in the skin which modifies the wound-healing process. We report a prospective comparative clinical trial aimed at evaluating an 810-nm diode-laser system to accelerate and improve the healing process in surgical scars immediately after skin closure. Ler mais

Aesthetic plastic surgery