Neoadjuvant Intratumoral Injection of Dendritic Cells in Breast Cancer

Backround: Autologous intratumoral dendritic cell injections were used to modulate the tumor reduction effects of standard neoadjuvant chemotherapy. Dendritic cells are important in the regulation of T cell immunity and have been shown to have activity in cancer patients. The neoadjuavant combination therapy was designed to expose dendritic cells to tumor cell apoptosis leading to induction of tumor antigen-specific responses.Methods: Seventeen women with stage II or III breast cancer with breast tumors at least 3 cm in size and had a confirmed initial breast biopsy were entered into this trial from August 2007 through 2009. All patients participating in the clinical trial had tumors that expressed either carcinoembryonic antigen (CEA) or survivin and were HER2-neu negative. They received 4 cycles of paclitaxel at 175 mg/m2 followed by 4 cycles of doxorubicin 60 mg/m2 and cyclophosphamide 600 mg/m2 (AC) in a bi-weekly dose dense fashion. Pegfilgrastim 6 mg subcutaneous injection was administered 24 hours after each cycle of chemotherapy. Autologous intratumoral dendritic cell injections were administered one week following the first three paclitaxel treatments. All patients consented to a pre-treatment biopsy and a second tumor biopsy after 4 cycles of paclitaxel to evaluate responses to the intratumoral dendritic cell injections. The endpoints of this trial included assessment of clinical and pathologic response in the breast, safety of the intratumoral dendritic cell injection, evaluation of tumor response, and induction of T cell responses to tumor antigens.Results: Fourteen patients are evaluable for response. The median age was 51.5, the median tumor size was 5.6 cm, and 64 % were estrogen receptor positive. A complete clinical response was observed in 57%, a partial response in 36%, and one stable disease response. A pathologic complete response with no evidence of tumor in the breast was confirmed in 2 patients (14 %). Treatment was well tolerated with no incidence of toxicity observed related to the intratumoral dendritic cell injections. Grade 3/4 hematologic toxicity was as expected for the chemotherapy. Other grade 3/4 toxicity related to the chemotherapy included fatigue, hand-foot, infection, mucositis, and hypocalcemia.Discussion: Combination neoadjuvant therapy with dose-dense paclitaxel followed by AC and autologous intratumoral dendritic cell injections administered between the first three cycles of paclitaxel is safe with no toxicity observed related to the intratumoral dendritic cell injections. Immune response to the treatment is being evaluated by proliferation and interferon-gamma production by peripheral blood mononuclear cells in response to tumor cell lysates, survivin, and CEA. Initial evaluation indicates that treatment resulted in generation of tumor specific responses in more than half of all treated patients.

Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 4128.

First Report of Bursaphelenchus pinophilus on Korean pine (Pinus koraiensis)

The genus Bursaphelenchus Fuchs, 1937 contains approximately 90 species (3) that are morphologically similar. Pine wood nematode, Bursaphelenchus xylophilus (4) Nickle, 1970, is the causal organism of pine wilt disease and accurate identification is essential for diagnosis of the disease. In Korea, pine wilt disease was first reported in 1988 and devastated 6,800 ha of pine forest through 2008. For a survey of trees with pine wilt disease, wood samples were taken randomly from dead Pinus koraiensis in Namyangju, Gyeonggi Province in Korea. The extracted nematodes from dead trees were maintained in culture on Botrytis cinerea and morphological characteristics were observed with an inverted light microscope (Leica DE/DMI 3000B). Identification of Bursaphelenchus spp. based on morphological characteristics is difficult, especially for identification of juveniles that carry few morphological features for species identification. The internal transcribed spacer (ITS) region in ribosomal DNA provides useful molecular diagnostic markers for this genus (1). The nematodes were provisionally identified as Bursaphelenchus pinophilus based on the characteristic long and arcuate body shape, male spicule with distinctive rostrum and small cucullus, female vulval flap, and mucronate conical tail. Other Bursaphelenchus spp. with vulval flaps and spicules with cucullus are B. xylophius, B. mucronatus, B. abruptus, and B. pinophilus. For molecular diagnosis, DNA was extracted from more than 30 individual nematodes with a DNeasy Kit (Qiagen, Valencia, CA) and ITS regions 1, 2, and 5.8S in rDNA were amplified by PCR (US/PTC-0220; Bio Rad, Hercules, CA). The ITS-restriction fragment length polymorphism pattern was consistent with that of B. pinophilus (2). The ITS rDNA sequence of B. pinophilus from Korean pines had a 98% sequence homology to that of B. pinophilus in GenBank (Accession No. AM160664). The pathogenicity of B. pinophilus has not been determined. To our knowledge, this is the first report of B. pinophilus on P. koraiensis, but it was previously reported from Poland, Germany, and Portugal on P. sylvestris and P. pinaster (1). References: (1) H. Braasch. EPPO Bull. 31:127, 2001. (2) W. Burgermeister et al. Russ. J. Nematol. 13:29, 2005. (3) R. Sriwati et al. Nematology 10:1, 2008. (4) G. Steiner and E. M. Buhrer. J. Agric. Res. 48:946, 1934.

First Report of Bursaphelenchus doui on Tulip Tree (Liriodendron tulipifera) in Korea

Tulip tree (Liriodendron tulipifera) is one the major tree species in Korean plantations, but it originated from North America. Bursaphelenchus doui was collected from the wood of dead tulip trees located at Wanju in Chonnam Province, Korea. Nematodes were maintained in fungal medium culture (Botrytis cinerae) on potato dextrose agar. B. doui is morphologically close to B. xylophilus, a causative organism of pine wilt disease, and identification to species is difficult. However, B. doui differs from the other species of the xyophilus group by the larger spicule (33.8 to 43.3 μm) (1). For accurate species identification, both morphology and molecular biological methods were applied. Morphological observations showed lip region 3.7 μm high and offset by a constriction, median bulb well developed, esophageal gland overlapping intestine dorsally, vulval flap present, tail terminus with distinct mucro. Males ventrally curved by fixation, spicules pared, and large with small, cucullus, oval-shaped bursa. Measurements of 20 females and 10 males (female; body length = 901.7 ± 60.5 μm, a = 34.3 ± 3.1, b = 10.4 ± 1.5, c = 23.0 ± 2.3, V = 77.1 ± 2.0, stylet length = 14.3 ± 0.4 μm, tail length = 39.5 ± 4.2 μm, length of postuterine sac = 104.6 ± 7.8: male; body length = 790.4 ± 40.6 μm, a = 34.4 ± 2.7, b = 10.8 ± 1.7, c = 22.7 ± 1.3, stylet length = 14.3 ± 0.3 μm, tail length = 34.8 ± 1.9 μm, spicules length = 39.5 ± 4.1 μm) were close to the original description of B. doui by Braasch et al. (1). For molecular diagnosis, DNA was extracted from more than 30 individual nematodes with a DNeasy Kit (Qiagen, Valencia, CA) and the internal transgenic spacers (ITS) 1, 2, and 5.8S regions in rDNA were amplified by PCR (US/PTC-0220; Bio Rad, Hercules, CA). ITS-restriction fragment length polymorphism (RFLP) can discriminate closely related species by using five different restriction enzymes (2). ITS-RFLP patterns obtained with these enzymes were the same as reported by Braasch et al. (1). B. doui previously has been detected in Korean wooden packages imported to China (1). However, most production of Korean wooden packages depends on imported coniferous trees from other countries. Although B. doui has been reported in Japanese red pine (Pinus densiflora) in Japan (3), the natural distribution of B. doui in Korea is unclear. On the basis of morphological and molecular biological information, we identify this nematode as B. doui. To our knowledge, this is the first report of B. doui on tulip tree and in a natural area in Korea. References: (1) H. Braasch et al. Russ. J. Nematol. 12:19, 2004. (2) W. Burgermeister et al. Russ. J. Nematol. 13:29, 2005. (3) N. Kanzaki et al. Nematology. 10:69, 2008.

Survivin knockdown by short hairpin RNA abrogates the growth of human hepatocellular carcinoma xenografts in nude mice

Abnormal high activation of survivin is involved in carcinogenesis of various types of cancer. Survivin has been shown to promote cell proliferation in human hepatocellular carcinoma (HCC). Survivin-targeting approaches have become a promising strategy for treating HCC. Here, we used a reporter system to screen effective survivin siRNA sequences. The effect of vector-based survivin short hairpin RNA (shRNA) on the malignant phenotype of HCC cells in vitro and in vivo was determined, and an adenovirus-mediated shRNA expression vector was developed to decrease survivin expression of the established HCC tumor in nude mice. In vitro study showed that stable survivin knockdown inhibited cancer cell proliferation, enhanced apoptotic susceptibility, arrested cell cycle in the G1 phase and resulted in apparent mitotic catastrophe. Moreover, cells stably expressing survivin shRNA showed decreased tumorigenicity in nude mice. An additional in vivo study showed that intratumoral injection of adenovirus-delivered survivin shRNA suppressed tumor growth by spontaneous apoptosis of cancer cells and significantly prolonged animal survival. In conclusion, we proved the therapeutic potential of survivin shRNA for the treatment of HCC. And our results indicated that adenovirus-delivered shRNA may serve as a novel therapeutic for HCC.

Fabrication of epitaxial nanostructured ferroelectrics and investigation of their domain structures

Nanostructured ferroelectrics are important objects for studies on ferroelectric size effects as well as for applications to memory devices with ultra-high memory density. In the present article, we introduce several approaches for the synthesis of confined ferroelectrics with sizes in and below the hundreds of nanometer range, including top-down processes like e-beam lithography, self-assembly methods like chemical solution deposition, and growth by pulsed laser deposition using stencil masks. Furthermore, the ferroelectric domain structure of part of these nanostructures is investigated by means of synchrotron X-ray diffraction, and its contribution to the ferroelectric properties is discussed.

Effect of valproic acid on body weight, food intake, physical activity and hormones: results of a randomized controlled trial

The objective of this study was to identify mechanisms through which valproic acid (VPA) causes weight gain. Healthy participants (N = 52) were randomized to VPA or placebo in a double-blind study. Energy intake (EI) was measured in the laboratory at lunch and dinner, and physical activity (PA) was measured with accelerometry. Glucose levels and hormones [Peptide YY(3-36), glucagon-like peptide-1 (GLP-1), leptin, ghrelin, insulin] that regulate EI were measured. Assessments occurred at baseline and week 3. Change from baseline was evaluated with mixed models (alpha = 0.05). Weight significantly increased in the VPA group (+0.49 kg), but not the placebo group. The VPA group increased fast food fats cravings and decreased glucose levels compared with placebo. Change in weight, EI and PA did not differ by group. Within group analyses indicated that the VPA group increased PA, hunger, binge eating, depression and GLP-1. VPA-associated weight gain is not likely due to changes in PA or the gut hormones studied. Although EI did not increase when measured after 3 weeks of treatment, VPA decreased glucose levels and increased motivation to eat; hence, EI might have increased in the short-term. Research testing VPA on short-term (1 week) EI, metabolism, and substrate partitioning is warranted.

Effect of calorie restriction on subjective ratings of appetite

BACKGROUND

Energy or calorie restriction (CR) has consistently been shown to produce weight loss and have beneficial health effects in numerous species, including primates and humans. Most individuals, however, are unable to sustain weight losses induced through reductions in energy intake, potentially due to increased hunger levels. The effects that prolonged CR has on subjective aspects of appetite have not been well studied. Thus, the present study tested the effect of 6 months of caloric restriction on appetite in healthy, overweight men and women.

METHODS

Forty-eight overweight men and women with a body mass index (BMI; kg m(-2)) between 25-29.9 took part in a 6-month study and were randomised into one of four groups: healthy diet (control); 25% CR; 12.5% CR plus exercise (12.5% increased energy expenditure; CR + EX); low-calorie diet [LCD; 3724 kJ day(-1) (890 kcal day(-1)) until 15% of initial body weight was lost, then maintenance]. Appetite markers (i.e. hunger, fullness, desire to eat, etc.) were assessed weekly during a fasting state.

RESULTS

Body weight was significantly reduced in all three energy-restricted groups (CR = -10.4 +/- 0.9%; CR + EX = -10.0 +/- 0.8%; and LCD = -13.9 +/-0.7%), indicating that participants were adherent to their energy restriction regimen, whereas the healthy diet control group remained weight stable (control = -1.0 +/- 1.1%). Despite these significant weight losses, appetite ratings of participants in the three energy-restricted groups at month 6 were similar to the weight stable control group.

CONCLUSIONS

CR regimens with low fat diets producing significant weight losses have similar effects on appetite markers over a 6-month time period compared to a weight stable control group.

The intravertebral cleft in benign vertebral compression fracture: the diagnostic performance of non-enhanced MRI and fat-suppressed contrast-enhanced MRI

We compared the diagnostic performance of non-enhanced MRI and fat-suppressed contrast-enhanced MRI (CEMRI) in diagnosing intravertebral clefts in benign vertebral compression fractures (VCFs). We retrospectively reviewed 99 consecutive patients who had undergone percutaneous vertebroplasty for VCFs. A cleft was defined as a signal void or hyperintense area on non-enhanced MRI (T(1) and T(2) weighted imaging) or as a hypointense area within a diffusely enhanced vertebra on CEMRI. A cleft was confirmed as a solid opacification on post-procedural radiographs. The interobserver reliability and MRI diagnostic performance were evaluated. The interobserver reliability of non-enhanced MRI was substantial (k _ 0.698) and the interobserver reliability of CEMRI was almost perfect (k _ 0.836). Post-procedural radiographs showed solid cleft opacification in 32 out of the 99 cases. The sensitivity and specificity of non-enhanced MRI were 0.72 and 0.82 (observer 1) and 0.63 and 0.87 (observer 2), respectively. The sensitivity and specificity of CEMRI were 0.94 and 0.63 (observer 1) and 0.85 and 0.60 (observer 2), respectively. The sensitivity of CEMRI was significantly higher than that of non-enhanced MRI, and the specificity of non-enhanced MRI was higher than that of CEMRI. CEMRI was highly reliable and sensitive, and non-enhanced MRI was specific for intravertebral clefts. Therefore, spine MRIs, including CEMRI, could provide useful information about intravertebral clefts before percutaneous vertebroplasty.

Identification of a new HLA-A*11 allele, HLA-A*1135, by sequence-based typing in Korean individual

A novel human leukocyte antigen (HLA)-A allele has been identified in the cord blood of a Korean baby. New HLA-A*1135 allele was different from HLA-A*1131 by three nucleotide substitution at codon 142 (ATC-->ACC) and codon 163 (CGG-->ACG), resulting in two amino acid change, Ile 142 Thr and Arg 163 Thr.

Identification of a new HLA-DRB1*14 variant, HLA-DRB1*1478, in a Korean individual

We report the identification of novel allele HLA-DRB1*1478 that was found during routine high-resolution sequence-based typing of the cord blood unit in Korean population. The DRB1*1478 allele shows two nucleotide differences from DRB1*1463 in exon 2 at nucleotide position 344 (G-->T) and 345 (T-->G), resulting in an amino acid change, Gly86Val.

Absence of donor-derived zona pellucida protein C homolog in the inner perivitelline layer of Peking duck (Anas platyrhynchos)-Japanese quail (Coturnix coturnix japonica) chimeras (Duails)

Avian blastodermal cells at stage X are used to produce interspecies chimeras for heterogenous poultry reproduction. However, recipient-derived inner perivitelline layer (IPVL)-enclosed donor-derived ova may affect the efficiency of germline transmission via chimera. Among the proteins in the IPVL, zona pellucida protein C (ZPC) plays an important role in sperm-egg binding and inducing the acrosome reaction. In the present study, Peking duck blastodermal cells at stage X were transferred into subgerminal cavities of Japanese quail embryos at the same stage. Fourteen female duck-quail chimeras (duails) were hatched and raised to sexual maturity. After being screened by PCR, 3 duails were selected for examination of donor-derived ZPC. A total of 152 IPVL protein samples from the individual eggs laid by the 3 duails then underwent a preliminary examination for the presence of donor-derived ZPC by means of SDS-PAGE, periodic acid-Schiff staining, and Western blotting. A novel 35-kDa ZPC, not observed in quail but in duck, was found in the IPVL of the duails. Further analysis of peptide mass fingerprinting of Peking duck ZPC, Japanese quail ZPC, and the 35-kDa duail ZPC by matrix-assisted laser desorption-ionization reflectron time-of-flight mass spectrometry revealed that the novel ZPC was an isoform of quail ZPC. Moreover, comparison of N-terminal amino acid sequences of these 3 ZPC confirmed that the 35-kDa quail ZPC had more amino acids at the N terminus than did native quail ZPC, and none of the donor-derived ZPC was found in the duails. These findings suggest that it would be difficult to obtain donor-derived offspring by natural mating of interspecies chimeras.

First Report of Pine Wilt Disease on Pinus koraiensis in Korea

Pine wilt disease is one of the most important forest tree diseases, especially in the East Asian countries of Japan, China, and Korea. The causal agent, Bursaphelenchus xylophilus (3), is transmitted by the insect vectors, pine sawyer beetles (Monochamus spp.). The vectors mainly attack coniferous trees and the infected trees die within several weeks. In Korea, pine wilt disease was first reported in Busan City in 1988, and now, the damaged area covers 7,820 ha and more than 60 cities in Korea. The main host trees are Pinus densiflora and P. thunbergii, which are the most common pines distributed in Korea. In 2006, however, we found pine wilt disease in a forest of P. koraiensis located in Gwangju City in Gyeonggi Province. Symptoms were systemic and leaves turned brown or yellowish. Wood samples were collected from the affected trees, and nematodes were extracted by a modified Baermann's funnel method. After 24 h, nematodes were collected from wood chips, and morphology was observed with an inverted light microscope (Leica DE/DMI 3000B, Wetzlar, Germany). Morphology was characterized by a typical Aphelenchoid-type esophagus, head constriction, female vulva flap, female tail, and a male spicule shape similar to B. xylophilus. For more accurate identification, DNA was extracted from individual nematodes with a DNeasy Kit (Qiagen, Valencia, CA). The internal transcribed spacers (ITS) 1 and 2 and 5.8S regions were amplified by PCR (1). Sequenced nucleotide information was compared with the sequences of B. xylophilus already reported in GenBank (Accession Nos. AB294736, AB277208, AM 157747, AY 347913, and BXU92464). ITS DNA sequences of the nematode from Korean pine was >99% identical to B. xylophilus in GenBank. The B. xylophilus from Korean pine tree was also successfully cultured in Botrytis cinerea medium and pathogenicity was tested from June to October 2007. More than 95% mortality was observed with the inoculation of 20 replicate 15-year-old trees of P. koraiensis and P. densiflora with 15,000 nematodes per tree. Therefore, we confirmed that pine wilt disease occurred in P. koraiensis in Korea. P. koraiensis is an endemic species in Korea and distribution is limited to the northern Korean Peninsula and some locations in Russia. It has been shown that P. koraiensis is susceptible to the pine wood nematode by an inoculation test in Japan (2); however, to our knowledge, this is the first report of pine wilt disease on P. koraiensis under field conditions in Korea. References: (1) W. K. Burgermeister et al. Russ. J. Nematol. 13:29, 2005. (2) K. Futai and T. Furuno. Bull. Kyoto Univ. For. 51:3, 1979. (3) G. Steiner and E. M. Buhrer. J. Agr. Res. 48:946, 1934.

First Report of the European Type of Bursaphelenchus mucronatus on Korean Pine (Pinus koraiensis) in Korea

More than 70 species of Bursaphelenchus have been reported and they are morphologically very similar. The pine wood nematode (Bursaphelenchus xylophilus) is a causal agent of pine wilt and accurate identification is essential for diagnosis of the disease. However, many other saprophytic nematodes are found in dead trees and some of them have high morphological similarity to B. xylophilus. B. mucronatus is commonly found in dead pine trees and is distinguished from B. xylophilus only by the presence of a distinct mucro in the female tail (3). However, natural populations of B. xylophilus show variation in tail morphology and some of them have a small lump on the end of the tail that looks like a short mucro, which could lead to misidentification. B. mucronatus has been reported to have two genotypes known as the East Asian type and the European type (2). The European type has a more rounded tail with a mucro, which is much more similar to B. xylophilus than the East Asian type. Molecular identification by internal transcribed spacer restriction fragment length polymorphism (ITS-RFLP) can distinguish these two genotypes clearly by using five different restriction enzymes (2). In Korea, we collected wood samples from dead Pinus koraiensis located at Pocheon, Gyeonggi Province in April, 2007 and nematodes were extracted by a modified Baermann funnel method. After 24 h, nematodes were collected and morphology was observed under an inverted light microscope (Leica DE/DMI 3000B, Wetzlar, Germany). Morphology was characterized by a typical Aphelenchoid-type esophagus, head constriction, female vulva flap, post uterine sac, female tail with mucro, and males with arched-shaped spicules. The tail was rounded with a long mucro >4 μm. For molecular diagnosis, DNA was extracted from single individual nematodes by using a DNeasy Kit (Qiagen, Valencia, CA) and the ITS 1 and 2 and 5.8S regions in rDNA were amplified by PCR (US/PTC-0220; Bio-Rad, Hercules, CA). ITS-RFLP patterns were analyzed and nucleotide sequences were compared with sequences of B. mucronatus already reported in GenBank (Accession Nos. AM179514, BMU93554, and DQ841162). The ITS-RFLP pattern of individuals matched the European type of B. mucronatus and was differentiated from the East Asian type by RsaI and HaeIII digestion (2). The ITS DNA sequence of nematodes from Korean pines was >98% identical to B. mucronatus in GenBank. The European type of B. mucronatus was consistently isolated from dead trees, but the pathogenicity of the European type of B. mucronatus on Korean pine is not yet clear. To our knowledge, this is the first report of the European type of B. mucronatus species on P. koraiensis in Korea, but it is already distributed in certain locations of Japan (4), China, and Europe (1). References: (1) H. Braasch et al. Nachrbl. Dtsch. Pflanzenschutzd. 51:312, 1999. (2) W. K. Burgermeister et al. Russ. J. Nematol. 13:29, 2005. (3) Y. Mamiya and N. Enda. Nematologica 25:353, 1979. (4) K. Togashi et al. Jpn. J. For. Res. 13:127, 2008.

Psychosocial and behavioral pre-treatment predictors of weight loss outcomes

This study tested whether baseline behavioral and psychological variables predict weight and fat loss among overweight, non-obese individuals participating in a six-month calorie restriction trial. Participants (N=48) were randomly assigned to four groups, three of which included a calorie restriction program and one of which served as a healthy diet weight maintenance control. For the purposes of this study, data were analyzed only for participants assigned to the three calorie restriction groups (n=36). Ten psychological and behavioral measures were investigated through principal components factor analysis to examine whether these measures were assessing similar or distinct psychological and behavioral constructs. Based on the obtained six-factor solution, one measure from each domain was selected for inclusion in hierarchical regression analyses, which was used to test the relative importance of psychosocial and behavioral variables in predicting percent weight and fat loss over six months. After controlling for demographic and treatment variables, the behavioral and psychological measures of negative mood states, poor psychosocial functioning, and somatic symptoms were associated with less weight loss (R2=0.68, p<0.001) and fat loss (R2=0.65, p<0.001) over six months. Among overweight individuals, poor psychological adjustment, somatic symptoms, and negative mood states appear to form a psychosocial profile that is predictive of less weight and fat loss in calorie restriction programs.

A 37-year-old spinal cord-injured female patient, transplanted of multipotent stem cells from human UC blood, with improved sensory perception and mobility, both functionally and morphologically: a case study

HLA-matched UC blood-derived multipotent stem cells were directly transplanted into the injured spinal cord site of a 37-year-old female patient suffering from spinal cord injury (SPI). In this case, human cord blood (UCB)-derived multipotent stem cells improved sensory perception and movement in the SPI patient's hips and thighs within 41 days of cell transplantation. CT and MRI results also showed regeneration of the spinal cord at the injured site and some of the cauda equina below it. Therefore, it is suggested that UCB multipotent stem cell transplantation could be a good treatment method for SPI patients.

Highly birefringent terahertz polarization maintaining plastic photonic crystal fibers

Guided-wave propagation of sub-ps terahertz (THz) pulses in a highly birefringent plastic photonic crystal fiber was studied by using a THz time domain spectroscopy technique. The plastic photonic crystal fiber was fabricated by using high density polyethylene tubes and solid filaments. The fabricated THz plastic photonic crystal fibers exhibit an extremely large birefringence of ~ 2.1 x 10(-2), which is almost one order of magnitude larger than that of previously reported photonic crystal fibers.