Linda Potter

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PURPOSE Wnt ligands play a major role in development and are important in cancer. Expression microarray analysis correlates one member of this family, WNT5A, to a subclass of melanomas with increased motility and invasion. There are no large studies of clinical samples primarily addressing the importance of WNT5A in melanoma progression or outcome.(More)
Cutaneous melanoma (CM) is the most lethal form of skin cancer. Along with some benign melanocytic tumors, the majority shows BRAF or NRAS mutation, but it is not known whether these are essential to all forms of melanocytic neoplasia. We screened 79 melanocytic tumors of different types for BRAF and NRAS mutations and looked at MAPK pathway activity using(More)
The association of Taq 1 and Fok 1 restriction fragment length polymorphisms of the vitamin D receptor with occurrence and outcome of malignant melanoma (MM), as predicted by tumour (Breslow) thickness, has been reported previously. We now report a novel adenine-guanine substitution -1012 bp relative to the exon 1a transcription start site (A-1012G), found(More)
PURPOSE BRAF mutations are present in two thirds of cutaneous melanomas and many of the rest have NRAS mutations. However, cutaneous melanoma is a heterogeneous disease with many clinicopathologic subtypes. Of these, the majority fits into four categories: superficial spreading, nodular, lentigo maligna, and acral lentiginous melanoma (ALM). Thus far, there(More)
BACKGROUND Virtually all BCCs have deregulation of the Hedgehog (Hh) signalling pathway and a proportion show nuclear beta-catenin accumulation. The latter is thought to be due to Hh pathway-directed Wnt expression but this has not been tested. An alternative cause of nuclear beta-catenin accumulation is gene mutation, which stabilizes the protein.(More)
Identification of prognostic biomarkers is timely for melanoma as clinicians seek ways to stratify patients for molecular therapy. MicroRNAs are promising as tissue biomarkers because they can be assayed directly from formalin-fixed paraffin-embedded clinical samples. We previously reported that microRNA-21 (miR-21) was strongly expressed in melanoma(More)
BACKGROUND The relationships between so-called spitzoid tumours have proven difficult to understand. OBJECTIVES To address three questions: does spitzoid tumour morphological similarity reflect molecular similarity? Does Spitz naevus progress into spitzoid melanoma? Are ambiguous spitzoid tumours genuine entities? METHODS BRAF, NRAS and HRAS mutations(More)
An in situ hybridization technique has been developed for the detection of immunoglobulin light chain mRNA in routine pathology specimens. The method detects kappa or lambda constant region sequences using a cocktail of synthetic oligonucleotide probes labelled with biotin or fluorescein 5-isothiocyanate (FITC) reporter molecules. The probes were labelled(More)
The distribution and expression of parathyroid hormone (PTH) were investigated in normal and abnormal parathyroid tissue. PTH was detected using a monoclonal antibody with specificity for the 44-68 region of the PTH molecule. Prominent reactivity for PTH was seen in normal parathyroid with a granular pattern of staining. Active parathyroid tissue (adenoma(More)