Tag: Japan

Possible correlation between Borna disease virus infection and Japanese patients with chronic fatigue syndrome

Abstract:

Borna disease virus (BDV) is a neurotropic, as yet unclassified, non-segmented, negative-sense, single-strand RNA virus. Natural infection with this virus has been reported to occur in horses and sheep. In addition, antibodies to BDV in plasma or BDV RNA in peripheral blood mononuclear cells (PBMCs) were also found in patients with neuropsychiatric diseases. We describe here the possible link between the patients with chronic fatigue syndrome (CFS) and infection with BDV.

 

Source: Kitani T, Kuratsune H, Fuke I, Nakamura Y, Nakaya T, Asahi S, Tobiume M, Yamaguti K, Machii T, Inagi R, Yamanishi K, Ikuta K. Possible correlation between Borna disease virus infection and Japanese patients with chronic fatigue syndrome. Microbiol Immunol. 1996;40(6):459-62. http://www.ncbi.nlm.nih.gov/pubmed/8839433

 

Chronic active Epstein-Barr virus infection in children in Japan

Abstract:

The patients with chronic active Epstein-Barr virus infection (CAEBV) in childhood in Japan are described. Among 39 registered cases, 20 patients were males and 19 were females. Unlike the X-linked lymphoproliferative syndrome, there was no hereditary background.

The incidence of hypersensitivity to mosquito bites was high (31.3%) as a past history. Most patients exhibited hepatomegaly (92.3%), splenomegaly (87.2%) and fever (84.6%). The incidence of absent anti-EB virus nuclear antigen titres was unexpectedly low (17.1%). Lymphoreticular disorders and cardiovascular diseases were major complications.

Twenty-four (61.5%) patients died 6 months to 8 years after the onset, mainly of hepatic failure (eight cases), cardiac failure (five cases), virus-associated haemophagocytic syndrome (three cases) and haematological malignancies (two cases). This study reveals the CAEBV in Japan has several clinical features and should be informative for the pathogenesis of EB virus.

 

Source: Ishihara S, Okada S, Wakiguchi H, Kurashige T, Morishima T, Kawa-Ha K. Chronic active Epstein-Barr virus infection in children in Japan. Acta Paediatr. 1995 Nov;84(11):1271-5. http://www.ncbi.nlm.nih.gov/pubmed/8580625

 

Psychobehavioral and immunological characteristics of adult people with chronic fatigue and patients with chronic fatigue syndrome

Abstract:

The psychobehavioral responses and cellular immune function were investigated in healthy people (control, N = 21), adult people with chronic fatigue (fatigue-non-CFS group, N = 24), and patients with chronic fatigue syndrome (CFS, N = 10).

Based on psychobehavioral responses, the fatigue-non-CFS group had low general activity levels (p < .05) and slightly depressive tendencies (p < .01) compared with the control. They had many life event stresses (p < .05) and sleep disturbances (p < .01), and they could not cope appropriately with stresses.

The fatigue-non-CFS group also showed significantly lower natural killer (NK) cell activity (p < .01) and decreased numbers of CD16+ and CD56+ cells (p < .05). Compared with the fatigue-non-CFS group, patients with CFS had higher degrees of physical fatigue (p < .01) and more life event stresses (p < .05).

They had lower general activity levels and social introversion. They were also in a depressive state. NK cell activity and the numbers of CD16+ and CD56+ cells were significantly reduced in patients with CFS (p < .01).

These findings suggest that adult people with chronic fatigue may be in an intermediate state between the healthy control and patients with CFS in terms of psychobehavioral responses and low NK cell activity. We observed three cases in such an intermediate state in whom CFS subsequently developed.

 

Source: Masuda A, Nozoe SI, Matsuyama T, Tanaka H. Psychobehavioral and immunological characteristics of adult people with chronic fatigue and patients with chronic fatigue syndrome. Psychosom Med. 1994 Nov-Dec;56(6):512-8. http://www.ncbi.nlm.nih.gov/pubmed/7871106

 

Human herpesvirus-7 (HHV-7)

Abstract:

HHV-7 first isolated in 1990 from a healthy individual, is a ubiquitous agent. The second independent isolation of HHV-7 from a chronic fatigue syndrome patient was reported in 1992. The seroepidemiology of HHV-7 suggested that its prevalence rate in the U.S.A. population is > 85%; however, in Japan a low prevalence rate has been reported. HHV-7 can be more readily isolated from the saliva than HHV-6. The primary infection of HHV-7 appears later in life than HHV-6. No disease has been reported that is etiologically linked to HHV-7. HHV-7 is more closely related to HHV-6 and the human cytomegalovirus than other members of the human herpesvirus family.

 

Source: Ablashi DV, Berneman ZN, Kramarsky B, Asano Y, Choudhury S, Pearson GR. Human herpesvirus-7 (HHV-7). In Vivo. 1994 Jul-Aug;8(4):549-54. http://www.ncbi.nlm.nih.gov/pubmed/7893982

 

Chronic fatigue syndrome and psychiatric diseases

Abstract:

The chronic fatigue syndrome consists of a combination of non-specific symptoms. Some believe that the CFS is subcategory of major depression, because the symptoms are similar to those of major depression. We believe that the CFS is quite different from major depression or neurotic depression, since the CFS has no lack of initiative and effort, no inhibition which is seen in endogenous depression, and sharp fluctuations in general fatigue, anxiety, and various persisting somatic symptoms, such as, malaise and mild fever. CFS seems to be similar to the neurasthenia. It is harmful, at least, in aetiology and treatment, to neglect the diagnosis of the CFS.

 

Source: Matsuno T, Hikita K, Matsuo T. Chronic fatigue syndrome and psychiatric diseases. Nihon Rinsho. 1994 May;52(5):1339-44. [Article in Japanese] http://www.ncbi.nlm.nih.gov/pubmed/8007411

 

Acylcarnitine deficiency in chronic fatigue syndrome

Abstract:

One of the characteristic complaints of patients with chronic fatigue syndrome (CFS) is the skeletal muscle-related symptom. However, the abnormalities in the skeletal muscle that explain the symptom are not clear.

Herein, we show that our patients with CFS had a deficiency of serum acylcarnitine. As carnitine has an important role in energy production and modulation of the intramitochondrial coenzyme A (CoA)/acyl-CoA ratio in the skeletal muscle, this deficiency might induce an energy deficit and/or abnormality of the intramitochondrial condition in the skeletal muscle, thus resulting in general fatigue, myalgia, muscle weakness, and postexertional malaise in patients with CFS.

Furthermore, the concentration of serum acylcarnitine in patients with CFS tended to increase to the normal level with the recovery of general fatigue. Therefore, the measurement of acylcarnitine would be a useful tool for the diagnosis and assessment of the degree of clinical manifestation in patients with CFS.

 

Source: Kuratsune H, Yamaguti K, Takahashi M, Misaki H, Tagawa S, Kitani T. Acylcarnitine deficiency in chronic fatigue syndrome. Clin Infect Dis. 1994 Jan;18 Suppl 1:S62-7. http://www.ncbi.nlm.nih.gov/pubmed/8148455

 

Prevalence of human herpesvirus 6 variants A and B in patients with chronic fatigue syndrome

Abstract:

 

Peripheral blood mononuclear cells collected from 13 patients with chronic fatigue syndrome and 13 healthy controls were analyzed for the presence of human herpesvirus 6 (HHV-6) DNA by variant-specific polymerase chain reaction and dot blot hybridization. HHV-6 DNA was detected in 7 of 13 (53%) patients, and of those 7 patients, 4 were positive for HHV-6 variant A DNA and 3 were for variant B. No HHV-6 DNA was detected in the controls. Serum antibody titers to the late antigen and antibody prevalence to the early antigen of HHV-6 were significantly higher in the patient group. These results suggest active replication of HHV-6 in patients with chronic fatigue syndrome.

 

Source: Yalcin S1, Kuratsune H, Yamaguchi K, Kitani T, Yamanishi K. Prevalence of human herpesvirus 6 variants A and B in patients with chronic fatigue syndrome. Microbiol Immunol. 1994;38(7):587-90. http://onlinelibrary.wiley.com/doi/10.1111/j.1348-0421.1994.tb01827.x/pdf (Full article)

 

Japanese patients with chronic fatigue syndrome are negative for known retrovirus infections

Abstract:

Although chronic fatigue syndrome (CFS) is known to be the syndrome that begins with an acute flu-like illness that may be due to the exposure to an infectious agent, there has been no convincing evidence on the causative agents.

Recently, human T-lymphotropic virus type II (HTLV-II)-like virus has been reported to be associated with the CFS by using HTLV Western blot analysis and polymerase chain reaction. However, some investigators could not detect HTLV-II by indirect immunofluorescence analysis.

Lately, CFS patients have been reported in Japan. We detected all 30 tested patients with CFS were seronegative for HTLV-II, HTLV-I and HIV by specific peptide ELISA and Western blot. Further, PCR analysis was negative for HTLV-II and retrovirus was not detected by coculture method with patients’ PBMC. Thus, known human retrovirus infections do not cause a CFS in Japan.

 

Source: Honda M, Kitamura K, Nakasone T, Fukushima Y, Matsuda S, Nishioka K, Matsuda J, Hashimoto N, Yamazaki S. Japanese patients with chronic fatigue syndrome are negative for known retrovirus infections. Microbiol Immunol. 1993;37(10):779-84. http://www.ncbi.nlm.nih.gov/pubmed/7507200

 

Allergy among Japanese patients with chronic fatigue syndrome

Abstract:

Allergy is a common feature of patients with chronic fatigue syndrome (CFS). Because of this strong association, we attempted to explore the prevalence of allergies among Japanese patients with CFS.

Of the present 18 patients, 78% had allergies during their premorbid and/or postmorbid conditions. Their allergies were mainly cutaneous reactions including drug allergies and 43% of the patients had 2 or more allergic reactions.

In the case of a premorbid condition, allergies improved spontaneously after onset of CFS. Clinical manifestations of CFS, however, became worse during the period of an association with allergies.

Immunologic tests, including peripheral blood lymphocyte-subsets, blastogenesis, natural killer-cell functions and cytokine-assays, were not any correlation between both patients with and without allergies.

Source: Matsumoto Y, Ninomiya S. Allergy among Japanese patients with chronic fatigue syndrome. Arerugi. 1992 Dec;41(12):1722-5. [Article in Japanese] http://www.ncbi.nlm.nih.gov/pubmed/1290417

 

A case of chronic fatigue syndrome who showed a beneficial effect by intravenous administration of magnesium sulphate

Abstract:

We have treated a case of chronic fatigue syndrome with atopic diathesis was had suffered general malaise, low grade fever, swelling of the lymph nodes, myalgias and arthralgias for a long time.

A 29-year-old female, who had been treated for atopic dermatitis for 5 years, complained of general malaise in May 1990. She was admitted to the nearest hospital in December 1990 because of low grade fever, swelling of the lymph nodes and an elevation of antinuclear antibody (2520x). She was transferred to our hospital in May 1991.

A diagnosis of collagen disease was not compatible with her condition. In addition to general malaise, fever and lymph node swelling, headache, myalgias, muscle weakness, arthralgias and insomnia were observed, and a diagnosis of chronic fatigue syndrome was made based on the working case definition proposed by Holmes et al.

Although eosinophilia, a high serum level of IgE, and elevation of RAST scores, low NK and ADCC activity, and a reduced level of NK cells in the peripheral blood were detected, serum antibodies to a number of viruses were in the normal range.

Treatments with non-steroid anti-inflammatory drugs, minor tranquilizers and antidepressant drugs were not effective at all. An administration of magnesium sulphate was intravenously performed once a week in order to improve her condition, especially severe general malaise. After about 6-week’s administration of magnesium sulphate, she noticed reduced easy fatigability and an improvement in her impaired daily activities. Finally she was able to leave the hospital in January 1992.(ABSTRACT TRUNCATED AT 250 WORDS)

 

Source: Takahashi H, Imai K, Katanuma A, Sugaya T, Hisano K, Motoya S, Aoki S, Sugiyama T, Yachi. A case of chronic fatigue syndrome who showed a beneficial effect by intravenous administration of magnesium sulphate. Arerugi. 1992 Nov;41(11):1605-10. [Article in Japanese] http://www.ncbi.nlm.nih.gov/pubmed/1492795